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2403 lines
100 KiB
2403 lines
100 KiB
import { ALL_PERMISSION_PROPS } from 'app/common/ACLPermissions';
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import { ACLRuleCollection, SPECIAL_RULES_TABLE_ID } from 'app/common/ACLRuleCollection';
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import { ActionGroup } from 'app/common/ActionGroup';
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import { createEmptyActionSummary } from 'app/common/ActionSummary';
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import { ServerQuery } from 'app/common/ActiveDocAPI';
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import { ApiError } from 'app/common/ApiError';
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import {
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AddRecord,
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BulkAddRecord,
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BulkColValues,
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BulkRemoveRecord,
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BulkUpdateRecord,
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} from 'app/common/DocActions';
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import { RemoveRecord, ReplaceTableData, UpdateRecord } from 'app/common/DocActions';
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import { CellValue, ColValues, DocAction, getTableId, isSchemaAction } from 'app/common/DocActions';
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import { TableDataAction, UserAction } from 'app/common/DocActions';
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import { DocData } from 'app/common/DocData';
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import { UserOverride } from 'app/common/DocListAPI';
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import { DocUsageSummary, FilteredDocUsageSummary } from 'app/common/DocUsage';
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import { normalizeEmail } from 'app/common/emails';
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import { ErrorWithCode } from 'app/common/ErrorWithCode';
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import { AclMatchInput, InfoEditor, InfoView } from 'app/common/GranularAccessClause';
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import { UserInfo } from 'app/common/GranularAccessClause';
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import { isCensored } from 'app/common/gristTypes';
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import { getSetMapValue, isNonNullish, pruneArray } from 'app/common/gutil';
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import { canEdit, canView, isValidRole, Role } from 'app/common/roles';
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import { FullUser, UserAccessData } from 'app/common/UserAPI';
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import { HomeDBManager } from 'app/gen-server/lib/HomeDBManager';
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import { GristObjCode } from 'app/plugin/GristData';
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import { compileAclFormula } from 'app/server/lib/ACLFormula';
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import { DocClients } from 'app/server/lib/DocClients';
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import { getDocSessionAccess, getDocSessionAltSessionId, getDocSessionUser,
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OptDocSession } from 'app/server/lib/DocSession';
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import log from 'app/server/lib/log';
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import { IPermissionInfo, PermissionInfo, PermissionSetWithContext } from 'app/server/lib/PermissionInfo';
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import { TablePermissionSetWithContext } from 'app/server/lib/PermissionInfo';
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import { integerParam } from 'app/server/lib/requestUtils';
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import { getRelatedRows, getRowIdsFromDocAction } from 'app/server/lib/RowAccess';
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import cloneDeep = require('lodash/cloneDeep');
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import fromPairs = require('lodash/fromPairs');
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import get = require('lodash/get');
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// tslint:disable:no-bitwise
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// Actions that add/update/remove/replace rows (DocActions only - UserActions
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// may also result in row changes but are not in this list).
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const ACTION_WITH_TABLE_ID = new Set(['AddRecord', 'BulkAddRecord', 'UpdateRecord', 'BulkUpdateRecord',
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'RemoveRecord', 'BulkRemoveRecord',
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'ReplaceTableData', 'TableData',
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]);
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type DataAction = AddRecord | BulkAddRecord | UpdateRecord | BulkUpdateRecord |
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RemoveRecord | BulkRemoveRecord | ReplaceTableData | TableDataAction;
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// Check if action adds/updates/removes/replaces rows.
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function isDataAction(a: UserAction): a is DataAction {
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return ACTION_WITH_TABLE_ID.has(String(a[0]));
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}
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function isAddRecordAction(a: DataAction): a is AddRecord | BulkAddRecord {
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return ['AddRecord', 'BulkAddRecord'].includes(a[0]);
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}
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function isRemoveRecordAction(a: DataAction): a is RemoveRecord | BulkRemoveRecord {
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return ['RemoveRecord', 'BulkRemoveRecord'].includes(a[0]);
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}
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function isBulkAction(a: DataAction): a is BulkAddRecord | BulkUpdateRecord |
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BulkRemoveRecord | ReplaceTableData | TableDataAction {
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return Array.isArray(a[2]);
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}
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// Check if a tableId is that of an ACL table. Currently just _grist_ACLRules and
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// _grist_ACLResources are accepted.
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function isAclTable(tableId: string): boolean {
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return ['_grist_ACLRules', '_grist_ACLResources'].includes(tableId);
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}
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// A list of key metadata tables that need special handling. Other metadata tables may
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// refer to material in some of these tables but don't need special handling.
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// TODO: there are other metadata tables that would need access control, or redesign -
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// specifically _grist_Attachments.
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const STRUCTURAL_TABLES = new Set(['_grist_Tables', '_grist_Tables_column', '_grist_Views',
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'_grist_Views_section', '_grist_Views_section_field',
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'_grist_ACLResources', '_grist_ACLRules']);
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// Actions that won't be allowed (yet) for a user with nuanced access to a document.
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// A few may be innocuous, but generally I've put them in this list if there are problems
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// tracking down what table the refer to, or they could allow creation/modification of a
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// formula, and are not handled elsewhere.
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const SPECIAL_ACTIONS = new Set(['InitNewDoc',
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'EvalCode',
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'UpdateSummaryViewSection',
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'DetachSummaryViewSection',
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'GenImporterView',
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'TransformAndFinishImport',
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'AddView',
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'CopyFromColumn',
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'ConvertFromColumn',
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'AddHiddenColumn',
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]);
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// Odd-ball actions marked as deprecated or which seem unlikely to be used.
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const SURPRISING_ACTIONS = new Set([
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'RemoveView',
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'AddViewSection',
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]);
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// Actions we'll allow unconditionally for now.
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const OK_ACTIONS = new Set(['Calculate', 'UpdateCurrentTime']);
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interface DocUpdateMessage {
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actionGroup: ActionGroup;
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docActions: DocAction[];
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docUsage: DocUsageSummary;
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}
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/**
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* Granular access for a single bundle, in different phases.
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*/
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export interface GranularAccessForBundle {
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canApplyBundle(): Promise<void>;
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appliedBundle(): Promise<void>;
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finishedBundle(): Promise<void>;
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sendDocUpdateForBundle(actionGroup: ActionGroup, docUsage: DocUsageSummary): Promise<void>;
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}
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/**
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*
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* Manage granular access to a document. This allows nuances other than the coarse
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* owners/editors/viewers distinctions. Nuances are stored in the _grist_ACLResources
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* and _grist_ACLRules tables.
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*
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* When the document is being modified, the object's GranularAccess is called at various
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* steps of the process to check access rights. The GranularAccess object stores some
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* state for an in-progress modification, to allow some caching of calculations across
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* steps and clients. We expect modifications to be serialized, and the following
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* pattern of calls for modifications:
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*
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* - assertCanMaybeApplyUserActions(), called with UserActions for an initial access check.
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* Since not all checks can be done without analyzing UserActions into DocActions,
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* it is ok for this call to pass even if a more definitive test later will fail.
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* - getGranularAccessForBundle(), called once a possible bundle has been prepared
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* (the UserAction has been compiled to DocActions).
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* - canApplyBundle(), called when DocActions have been produced from UserActions,
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* but before those DocActions have been applied to the DB. If fails, the modification
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* will be abandoned.
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* - appliedBundle(), called when DocActions have been applied to the DB, but before
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* those changes have been sent to clients.
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* - sendDocUpdateforBundle() is called once a bundle has been applied, to notify
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* client of changes.
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* - finishedBundle(), called when completely done with modification and any needed
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* client notifications, whether successful or failed.
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*
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*
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*/
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export class GranularAccess implements GranularAccessForBundle {
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// The collection of all rules.
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private _ruler = new Ruler(this);
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// Cache of user attributes associated with the given docSession. It's a WeakMap, to allow
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// garbage-collection once docSession is no longer in use.
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private _userAttributesMap = new WeakMap<OptDocSession, UserAttributes>();
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private _prevUserAttributesMap: WeakMap<OptDocSession, UserAttributes>|undefined;
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// When broadcasting a sequence of DocAction[]s, this contains the state of
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// affected rows for the relevant table before and after each DocAction. It
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// may contain some unaffected rows as well.
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private _steps: Promise<ActionStep[]>|null = null;
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// Intermediate metadata and rule state, if needed.
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private _metaSteps: Promise<MetaStep[]>|null = null;
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// Access control is done sequentially, bundle by bundle. This is the current bundle.
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private _activeBundle: {
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docSession: OptDocSession,
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userActions: UserAction[],
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docActions: DocAction[],
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isDirect: boolean[],
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undo: DocAction[],
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// Flag tracking whether a set of actions have been applied to the database or not.
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applied: boolean,
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// Flag for whether user actions mention a rule change (clients are asked to reload
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// in this case).
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hasDeliberateRuleChange: boolean,
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// Flag for whether doc actions mention a rule change, even if passive due to
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// schema changes.
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hasAnyRuleChange: boolean,
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}|null;
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public constructor(
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private _docData: DocData,
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private _docClients: DocClients,
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private _fetchQueryFromDB: (query: ServerQuery) => Promise<TableDataAction>,
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private _recoveryMode: boolean,
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private _homeDbManager: HomeDBManager | null,
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private _docId: string) {
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}
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public getGranularAccessForBundle(docSession: OptDocSession, docActions: DocAction[], undo: DocAction[],
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userActions: UserAction[], isDirect: boolean[]): void {
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if (this._activeBundle) { throw new Error('Cannot start a bundle while one is already in progress'); }
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// This should never happen - attempts to write to a pre-fork session should be
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// caught by an Authorizer. But let's be paranoid, since we may be pretending to
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// be an owner for granular access purposes, and owners can write if we're not
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// careful!
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if (docSession.forkingAsOwner) { throw new Error('Should never modify a prefork'); }
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this._activeBundle = {
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docSession, docActions, undo, userActions, isDirect,
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applied: false, hasDeliberateRuleChange: false, hasAnyRuleChange: false
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};
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this._activeBundle.hasDeliberateRuleChange =
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scanActionsRecursively(userActions, (a) => isAclTable(String(a[1])));
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this._activeBundle.hasAnyRuleChange =
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scanActionsRecursively(docActions, (a) => isAclTable(String(a[1])));
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}
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/**
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* Update granular access from DocData.
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*/
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public async update() {
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await this._ruler.update(this._docData);
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// Also clear the per-docSession cache of user attributes.
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this._userAttributesMap = new WeakMap();
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}
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public getUser(docSession: OptDocSession): Promise<UserInfo> {
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return this._getUser(docSession);
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}
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public async getCachedUser(docSession: OptDocSession): Promise<UserInfo> {
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const access = await this._getAccess(docSession);
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return access.getUser();
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}
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/**
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* Check whether user has any access to table.
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*/
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public async hasTableAccess(docSession: OptDocSession, tableId: string) {
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const pset = await this.getTableAccess(docSession, tableId);
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return this.getReadPermission(pset) !== 'deny';
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}
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/**
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* Called after UserAction[]s have been applied in the sandbox, and DocAction[]s have been
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* computed, but before we have committed those DocAction[]s to the database. If this
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* throws an exception, the sandbox changes will be reverted.
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*/
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public async canApplyBundle() {
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if (!this._activeBundle) { throw new Error('no active bundle'); }
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const {docActions, docSession, isDirect} = this._activeBundle;
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if (this._activeBundle.hasDeliberateRuleChange && !await this.isOwner(docSession)) {
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throw new ErrorWithCode('ACL_DENY', 'Only owners can modify access rules');
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}
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// Normally, viewer requests would never reach this point, but they can happen
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// using the "view as" functionality where user is an owner wanting to preview the
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// access level of another. And again, the default access rules would normally
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// forbid edit access to a viewer - but that can be overridden.
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// An alternative to this check would be to sandwich user-defined access rules
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// between some defaults. Currently the defaults have lower priority than
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// user-defined access rules.
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if (!canEdit(await this.getNominalAccess(docSession))) {
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throw new ErrorWithCode('ACL_DENY', 'Only owners or editors can modify documents');
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}
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if (this._ruler.haveRules()) {
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await Promise.all(
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docActions.map((action, actionIdx) => {
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if (isDirect[actionIdx]) {
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return this._checkIncomingDocAction({docSession, action, actionIdx});
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}
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}));
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}
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if (this._recoveryMode) {
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// Don't do any further checking in recovery mode.
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return;
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}
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// If the actions change any rules, verify that we'll be able to handle the changed rules. If
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// they are to cause an error, reject the action to avoid forcing user into recovery mode.
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// WATCH OUT - this will trigger for "passive" changes caused by tableId/colId renames.
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if (docActions.some(docAction => isAclTable(getTableId(docAction)))) {
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// Create a tmpDocData with just the tables we care about, then update docActions to it.
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const tmpDocData: DocData = new DocData(
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(tableId) => { throw new Error("Unexpected DocData fetch"); }, {
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_grist_Tables: this._docData.getMetaTable('_grist_Tables').getTableDataAction(),
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_grist_Tables_column: this._docData.getMetaTable('_grist_Tables_column').getTableDataAction(),
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_grist_ACLResources: this._docData.getMetaTable('_grist_ACLResources').getTableDataAction(),
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_grist_ACLRules: this._docData.getMetaTable('_grist_ACLRules').getTableDataAction(),
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});
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for (const da of docActions) {
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tmpDocData.receiveAction(da);
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}
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// Use the post-actions data to process the rules collection, and throw error if that fails.
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const ruleCollection = new ACLRuleCollection();
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await ruleCollection.update(tmpDocData, {log, compile: compileAclFormula});
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if (ruleCollection.ruleError) {
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throw new ApiError(ruleCollection.ruleError.message, 400);
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}
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try {
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ruleCollection.checkDocEntities(tmpDocData);
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} catch (err) {
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throw new ApiError(err.message, 400);
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}
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}
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}
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/**
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* This should be called after each action bundle has been applied to the database,
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* but before the actions are broadcast to clients. It will set us up to be able
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* to efficiently filter those broadcasts.
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*
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* We expect actions bundles for a document to be applied+broadcast serially (the
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* broadcasts can be parallelized, but should complete before moving on to further
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* document mutation).
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*/
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public async appliedBundle() {
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if (!this._activeBundle) { throw new Error('no active bundle'); }
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const {docActions} = this._activeBundle;
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this._activeBundle.applied = true;
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if (!this._ruler.haveRules()) { return; }
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// Check if a table that affects user attributes has changed. If so, put current
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// attributes aside for later comparison, and clear cache.
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const attrs = new Set([...this._ruler.ruleCollection.getUserAttributeRules().values()].map(r => r.tableId));
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const attrChange = docActions.some(docAction => attrs.has(getTableId(docAction)));
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if (attrChange) {
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this._prevUserAttributesMap = this._userAttributesMap;
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this._userAttributesMap = new WeakMap();
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}
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// If there's a schema change, zap permission cache.
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const schemaChange = docActions.some(docAction => isSchemaAction(docAction));
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if (attrChange || schemaChange) {
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this._ruler.clearCache();
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}
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}
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/**
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* This should be called once an action bundle has been broadcast to
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* all clients (or the bundle has been denied). It will clean up
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* any temporary state cached for filtering those broadcasts.
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*/
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public async finishedBundle() {
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if (!this._activeBundle) { return; }
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if (this._activeBundle.applied) {
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const {docActions} = this._activeBundle;
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await this._updateRules(docActions);
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}
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this._steps = null;
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this._metaSteps = null;
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this._prevUserAttributesMap = undefined;
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this._activeBundle = null;
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}
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/**
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* Filter DocActions to be sent to a client.
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*/
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public async filterOutgoingDocActions(docSession: OptDocSession, docActions: DocAction[]): Promise<DocAction[]> {
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// If the user requested a rule change, trigger a reload.
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if (this._activeBundle?.hasDeliberateRuleChange) {
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// TODO: could avoid reloading in many cases, especially for an owner who has full
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// document access.
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throw new ErrorWithCode('NEED_RELOAD', 'document needs reload, access rules changed');
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}
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// Optimize case where there are no rules to enforce.
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if (!this._ruler.haveRules()) { return docActions; }
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// If user attributes have changed, trigger a reload.
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await this._checkUserAttributes(docSession);
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const actions = await Promise.all(
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docActions.map((action, actionIdx) => this._filterOutgoingDocAction({docSession, action, actionIdx})));
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return ([] as DocAction[]).concat(...actions);
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}
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/**
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* Filter an ActionGroup to be sent to a client.
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*/
|
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public async filterActionGroup(
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docSession: OptDocSession,
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actionGroup: ActionGroup,
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options: {role?: Role | null} = {}
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): Promise<ActionGroup> {
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if (await this.allowActionGroup(docSession, actionGroup, options)) { return actionGroup; }
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// For now, if there's any nuance at all, suppress the summary and description.
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const result: ActionGroup = { ...actionGroup };
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result.actionSummary = createEmptyActionSummary();
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result.desc = '';
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return result;
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}
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|
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/**
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* Check whether an ActionGroup can be sent to the client. TODO: in future, we'll want
|
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* to filter acceptable parts of ActionGroup, rather than denying entirely.
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*/
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public async allowActionGroup(
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docSession: OptDocSession,
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_actionGroup: ActionGroup,
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options: {role?: Role | null} = {}
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): Promise<boolean> {
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return this.canReadEverything(docSession, options);
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}
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|
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/**
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|
* Filter DocUsageSummary to be sent to a client.
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|
*/
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|
public async filterDocUsageSummary(
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docSession: OptDocSession,
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docUsage: DocUsageSummary,
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options: {role?: Role | null} = {}
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): Promise<FilteredDocUsageSummary> {
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const result: FilteredDocUsageSummary = { ...docUsage };
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const role = options.role ?? await this.getNominalAccess(docSession);
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const hasEditRole = canEdit(role);
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if (!hasEditRole) { result.dataLimitStatus = null; }
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const hasFullReadAccess = await this.canReadEverything(docSession);
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if (!hasEditRole || !hasFullReadAccess) {
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result.rowCount = 'hidden';
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result.dataSizeBytes = 'hidden';
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result.attachmentsSizeBytes = 'hidden';
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}
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return result;
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}
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|
|
/**
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|
* Check if user may be able to apply a list of actions. Throws if
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|
* user cannot apply an action. Returns true if a user can perhaps apply an
|
|
* action, or false if we know we need to defer making that determination
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|
* until the data engine translates the user actions to doc actions.
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|
*/
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public async assertCanMaybeApplyUserActions(docSession: OptDocSession, actions: UserAction[]): Promise<boolean> {
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|
if (this._hasExceptionalFullAccess(docSession)) { return true; }
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|
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let canMaybeApply = true;
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for (const action of actions) {
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if (!await this.assertCanMaybeApplyUserAction(docSession, action)) {
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canMaybeApply = false;
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break;
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}
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}
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await this._checkPossiblePythonFormulaModification(docSession, actions);
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await this._checkAddOrUpdateAccess(docSession, actions);
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return canMaybeApply;
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}
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|
|
/**
|
|
* Called when it is permissible to partially fulfill the requested actions.
|
|
* Will remove forbidden actions in a very limited set of recognized circumstances.
|
|
* In fact, currently in only one circumstance:
|
|
*
|
|
* - If there is a single requested action, and it is an ApplyUndoActions.
|
|
* The goal being to let a user undo their action to the extent that it
|
|
* is possible to do so.
|
|
*
|
|
* In this case, the list of actions nested in ApplyUndoActions will be extracted,
|
|
* treated as DocActions, and filtered to remove any component parts (at action,
|
|
* column, row, or individual cell level) that would be forbidden.
|
|
*
|
|
* Beyond pure data changes, there are no heroics - any schema change will
|
|
* result in prefiltering being skipped.
|
|
*
|
|
* Any filtering done here is NOT a security measure, and the output should
|
|
* not be granted any level of automatic trust.
|
|
*/
|
|
public async prefilterUserActions(docSession: OptDocSession, actions: UserAction[]): Promise<UserAction[]> {
|
|
// Currently we only attempt prefiltering for an ApplyUndoActions.
|
|
if (actions.length !== 1) { return actions; }
|
|
const userAction = actions[0];
|
|
if (userAction[0] !== 'ApplyUndoActions') { return actions; }
|
|
|
|
// Ok, this is an undo. Unpack the requested undo actions. For a bona
|
|
// fide ApplyUndoActions, these would be doc actions generated by the
|
|
// data engine and stored in action history. But there is no actual
|
|
// restriction in how ApplyUndoActions could be generated. Security
|
|
// is enforced separately, so we don't need to be paranoid here.
|
|
const docActions = userAction[1] as DocAction[];
|
|
|
|
// Bail out if there is any hint of a schema change.
|
|
// TODO: may want to also bail if an action we'd need to filter would
|
|
// affect a row id used later in the bundle. Perhaps prefiltering
|
|
// should be restricted to bundles of updates only for that reason.
|
|
for (const action of docActions) {
|
|
if (!isDataAction(action) || getTableId(action).startsWith('_grist')) {
|
|
return actions;
|
|
}
|
|
}
|
|
|
|
// Run through a simulation of access control on these actions,
|
|
// retaining only permitted material.
|
|
const proposedActions: UserAction[] = [];
|
|
try {
|
|
// Establish our doc actions as the current context for access control.
|
|
// We don't have undo information for them, but don't need to because
|
|
// they have not been applied to the db. Treat all actions as "direct"
|
|
// since we could not trust claims of indirectness currently in
|
|
// any case (though we could rearrange to limit how undo actions are
|
|
// requested).
|
|
this.getGranularAccessForBundle(docSession, docActions, [], docActions,
|
|
docActions.map(() => true));
|
|
for (const [actionIdx, action] of docActions.entries()) {
|
|
// A single action might contain forbidden material at cell, row, column,
|
|
// or table level. Retaining permitted material may require refactoring the
|
|
// single action into a series of actions.
|
|
try {
|
|
await this._checkIncomingDocAction({docSession, action, actionIdx});
|
|
// Nothing forbidden! Keep this action unchanged.
|
|
proposedActions.push(action);
|
|
} catch (e) {
|
|
if (String(e.code) !== 'ACL_DENY') { throw e; }
|
|
const acts = await this._prefilterDocAction({docSession, action, actionIdx});
|
|
proposedActions.push(...acts);
|
|
// Presumably we've changed the action. Zap our cache of intermediate
|
|
// states, since it is stale now. TODO: reorganize cache to so can avoid wasting
|
|
// time repeating work unnecessarily. The cache was designed with all-or-nothing
|
|
// operations in mind, and is poorly suited to prefiltering.
|
|
// Note: the meaning of newRec is slippery in prefiltering, since it depends on
|
|
// state at the end of the bundle, but that state is unstable now.
|
|
// TODO look into prefiltering in cases using newRec in a many-action bundle.
|
|
this._steps = null;
|
|
this._metaSteps = null;
|
|
}
|
|
}
|
|
} finally {
|
|
await this.finishedBundle();
|
|
}
|
|
return [['ApplyUndoActions', proposedActions]];
|
|
}
|
|
|
|
/**
|
|
* Check if user may be able to apply a given action. Throws if
|
|
* user cannot apply the action. Returns true if a user can apply an
|
|
* action, or false if we need to defer making that determination
|
|
* until the data engine translates the user actions to doc actions.
|
|
*/
|
|
public async assertCanMaybeApplyUserAction(docSession: OptDocSession, a: UserAction|DocAction): Promise<boolean> {
|
|
const name = a[0] as string;
|
|
if (this._hasExceptionalFullAccess(docSession)) { return true; }
|
|
if (OK_ACTIONS.has(name)) { return true; }
|
|
if (SPECIAL_ACTIONS.has(name)) {
|
|
if (await this.hasNuancedAccess(docSession)) {
|
|
throw new ErrorWithCode('ACL_DENY', `Blocked by access rules: '${name}' actions need uncomplicated access`);
|
|
}
|
|
return true;
|
|
}
|
|
if (SURPRISING_ACTIONS.has(name)) {
|
|
if (!await this.hasFullAccess(docSession)) {
|
|
throw new ErrorWithCode('ACL_DENY', `Blocked by access rules: '${name}' actions need full access`);
|
|
}
|
|
return true;
|
|
}
|
|
if (name === 'ApplyUndoActions') {
|
|
return this.assertCanMaybeApplyUserActions(docSession, a[1] as UserAction[]);
|
|
} else if (name === 'ApplyDocActions') {
|
|
return this.assertCanMaybeApplyUserActions(docSession, a[1] as UserAction[]);
|
|
} else if (name === 'AddOrUpdateRecord') {
|
|
// This case is a bit tricky.
|
|
// Access is checked separately in _checkAddOrUpdateAccess.
|
|
return true;
|
|
} else if (isDataAction(a)) {
|
|
const tableId = getTableId(a);
|
|
if (tableId.startsWith('_grist_')) {
|
|
return false; // have to look closely
|
|
}
|
|
const tableAccess = await this.getTableAccess(docSession, tableId);
|
|
const accessCheck = await this._getAccessForActionType(docSession, a, 'fatal');
|
|
accessCheck.get(tableAccess); // will throw if access denied.
|
|
return true;
|
|
} else {
|
|
return false; // have to look closely
|
|
}
|
|
}
|
|
|
|
/**
|
|
* For changes that could include Python formulas, check for schema access early.
|
|
*/
|
|
public needEarlySchemaPermission(a: UserAction|DocAction): boolean {
|
|
const name = a[0] as string;
|
|
if (name === 'ModifyColumn' || name === 'SetDisplayFormula') {
|
|
return true;
|
|
} else if (isDataAction(a)) {
|
|
const tableId = getTableId(a);
|
|
if (tableId === '_grist_Tables_column' || tableId === '_grist_Validations') {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Check whether access is simple, or there are granular nuances that need to be
|
|
* worked through. Currently if there are no owner-only tables, then everyone's
|
|
* access is simple and without nuance.
|
|
*/
|
|
public async hasNuancedAccess(docSession: OptDocSession): Promise<boolean> {
|
|
if (!this._ruler.haveRules()) { return false; }
|
|
return !await this.hasFullAccess(docSession);
|
|
}
|
|
|
|
/**
|
|
* Check if user is explicitly permitted to download/copy document.
|
|
* They may be allowed to download in any case, see canCopyEverything.
|
|
*/
|
|
public async hasFullCopiesPermission(docSession: OptDocSession): Promise<boolean> {
|
|
const permInfo = await this._getAccess(docSession);
|
|
return permInfo.getColumnAccess(SPECIAL_RULES_TABLE_ID, 'FullCopies').perms.read === 'allow';
|
|
}
|
|
|
|
/**
|
|
* Check if user may view Access Rules.
|
|
*/
|
|
public async hasAccessRulesPermission(docSession: OptDocSession): Promise<boolean> {
|
|
const permInfo = await this._getAccess(docSession);
|
|
return permInfo.getColumnAccess(SPECIAL_RULES_TABLE_ID, 'AccessRules').perms.read === 'allow';
|
|
}
|
|
|
|
/**
|
|
* Check whether user can read everything in document. Checks both home-level and doc-level
|
|
* permissions.
|
|
*/
|
|
public async canReadEverything(
|
|
docSession: OptDocSession,
|
|
options: {role?: Role | null} = {}
|
|
): Promise<boolean> {
|
|
const access = options.role ?? await this.getNominalAccess(docSession);
|
|
if (!canView(access)) { return false; }
|
|
const permInfo = await this._getAccess(docSession);
|
|
return this.getReadPermission(permInfo.getFullAccess()) === 'allow';
|
|
}
|
|
|
|
/**
|
|
* An odd little right for findColFromValues and autocomplete. Allow if user can read
|
|
* all data, or is an owner. Might be worth making a special permission.
|
|
*/
|
|
public async canScanData(docSession: OptDocSession): Promise<boolean> {
|
|
return await this.isOwner(docSession) || await this.canReadEverything(docSession);
|
|
}
|
|
|
|
/**
|
|
* Check whether user can copy everything in document. Owners can always copy
|
|
* everything, even if there are rules that specify they cannot.
|
|
*
|
|
* There's a small wrinkle about access rules. The content
|
|
* of _grist_ACLRules and Resources are only send to clients that are owners,
|
|
* but could be copied by others by other means (e.g. download) as long as all
|
|
* tables or columns are readable. This seems ok (no private info involved),
|
|
* just a bit inconsistent.
|
|
*/
|
|
public async canCopyEverything(docSession: OptDocSession): Promise<boolean> {
|
|
return await this.hasFullCopiesPermission(docSession) ||
|
|
await this.canReadEverything(docSession);
|
|
}
|
|
|
|
/**
|
|
* Check whether user has full access to the document. Currently that is interpreted
|
|
* as equivalent owner-level access to the document.
|
|
* TODO: uses of this method should be checked to see if they can be fleshed out
|
|
* now we have more of the ACL implementation done.
|
|
*/
|
|
public hasFullAccess(docSession: OptDocSession): Promise<boolean> {
|
|
return this.isOwner(docSession);
|
|
}
|
|
|
|
/**
|
|
* Check whether user has owner-level access to the document.
|
|
*/
|
|
public async isOwner(docSession: OptDocSession): Promise<boolean> {
|
|
const access = await this.getNominalAccess(docSession);
|
|
return access === 'owners';
|
|
}
|
|
|
|
/**
|
|
*
|
|
* If the user does not have access to the full document, we need to filter out
|
|
* parts of the document metadata. For simplicity, we overwrite rather than
|
|
* filter for now, so that the overall structure remains consistent. We overwrite:
|
|
*
|
|
* - names, textual ids, formulas, and other textual options
|
|
* - foreign keys linking columns/views/sections back to a forbidden table
|
|
*
|
|
* On the client, a page with a blank name will be marked gracefully as unavailable.
|
|
*
|
|
* Some information leaks, for example the existence of private tables and how
|
|
* many columns they had, and something of the relationships between them. Long term,
|
|
* it could be better to zap rows entirely, and do the work of cleaning up any cross
|
|
* references to them.
|
|
*
|
|
*/
|
|
public async filterMetaTables(docSession: OptDocSession,
|
|
tables: {[key: string]: TableDataAction}): Promise<{[key: string]: TableDataAction}> {
|
|
// If user has right to read everything, return immediately.
|
|
if (await this.canReadEverything(docSession)) { return tables; }
|
|
// If we are going to modify metadata, make a copy.
|
|
tables = cloneDeep(tables);
|
|
|
|
const permInfo = await this._getAccess(docSession);
|
|
const censor = new CensorshipInfo(permInfo, this._ruler.ruleCollection, tables,
|
|
await this.hasAccessRulesPermission(docSession));
|
|
|
|
for (const tableId of STRUCTURAL_TABLES) {
|
|
censor.apply(tables[tableId]);
|
|
}
|
|
return tables;
|
|
}
|
|
|
|
/**
|
|
* Distill the clauses for the given session and table, to figure out the
|
|
* access level and any row-level access functions needed.
|
|
*/
|
|
public async getTableAccess(docSession: OptDocSession, tableId: string): Promise<TablePermissionSetWithContext> {
|
|
if (this._hasExceptionalFullAccess(docSession)) {
|
|
return {
|
|
perms: {read: 'allow', create: 'allow', delete: 'allow', update: 'allow', schemaEdit: 'allow'},
|
|
ruleType: 'table',
|
|
getMemos() { throw new Error('never needed'); }
|
|
};
|
|
}
|
|
return (await this._getAccess(docSession)).getTableAccess(tableId);
|
|
}
|
|
|
|
/**
|
|
* Modify table data in place, removing any rows or columns to which access
|
|
* is not granted.
|
|
*/
|
|
public async filterData(docSession: OptDocSession, data: TableDataAction) {
|
|
const permInfo = await this._getAccess(docSession);
|
|
const cursor: ActionCursor = {docSession, action: data, actionIdx: null};
|
|
const tableId = getTableId(data);
|
|
if (this.getReadPermission(permInfo.getTableAccess(tableId)) === 'mixed') {
|
|
const readAccessCheck = this._readAccessCheck(docSession);
|
|
await this._filterRowsAndCells(cursor, data, data, readAccessCheck, {allowRowRemoval: true});
|
|
}
|
|
|
|
// Filter columns, omitting any to which the user has no access, regardless of rows.
|
|
this._filterColumns(
|
|
data[3],
|
|
(colId) => this.getReadPermission(permInfo.getColumnAccess(tableId, colId)) !== 'deny');
|
|
}
|
|
|
|
public async getUserOverride(docSession: OptDocSession): Promise<UserOverride|undefined> {
|
|
await this._getUser(docSession);
|
|
return this._getUserAttributes(docSession).override;
|
|
}
|
|
|
|
public getReadPermission(ps: PermissionSetWithContext) {
|
|
return ps.perms.read;
|
|
}
|
|
|
|
public assertCanRead(ps: PermissionSetWithContext) {
|
|
accessChecks.fatal.read.get(ps);
|
|
}
|
|
|
|
/**
|
|
* Broadcast document changes to all clients, with appropriate filtering.
|
|
*/
|
|
public async sendDocUpdateForBundle(actionGroup: ActionGroup, docUsage: DocUsageSummary) {
|
|
if (!this._activeBundle) { throw new Error('no active bundle'); }
|
|
const { docActions, docSession } = this._activeBundle;
|
|
const client = docSession && docSession.client || null;
|
|
const message: DocUpdateMessage = { actionGroup, docActions, docUsage };
|
|
await this._docClients.broadcastDocMessage(client, 'docUserAction',
|
|
message,
|
|
(_docSession) => this._filterDocUpdate(_docSession, message));
|
|
}
|
|
|
|
// Remove cached access information for a given session.
|
|
public flushAccess(docSession: OptDocSession) {
|
|
this._ruler.flushAccess(docSession);
|
|
this._userAttributesMap.delete(docSession);
|
|
this._prevUserAttributesMap?.delete(docSession);
|
|
}
|
|
|
|
// Get a set of example users for playing with access control.
|
|
// We use the example.com domain, which is reserved for uses like this.
|
|
public getExampleViewAsUsers(): UserAccessData[] {
|
|
return [
|
|
{id: 0, email: 'owner@example.com', name: 'Owner', access: 'owners'},
|
|
{id: 0, email: 'editor1@example.com', name: 'Editor 1', access: 'editors'},
|
|
{id: 0, email: 'editor2@example.com', name: 'Editor 2', access: 'editors'},
|
|
{id: 0, email: 'viewer@example.com', name: 'Viewer', access: 'viewers'},
|
|
{id: 0, email: 'unknown@example.com', name: 'Unknown User', access: null},
|
|
];
|
|
}
|
|
|
|
// Compile a list of users mentioned in user attribute tables keyed by email.
|
|
// If there is a Name column or an Access column, in the table, we use them.
|
|
public async collectViewAsUsersFromUserAttributeTables(): Promise<Array<Partial<UserAccessData>>> {
|
|
const result: Array<Partial<UserAccessData>> = [];
|
|
for (const clause of this._ruler.ruleCollection.getUserAttributeRules().values()) {
|
|
if (clause.charId !== 'Email') { continue; }
|
|
try {
|
|
const users = await this._fetchQueryFromDB({
|
|
tableId: clause.tableId,
|
|
filters: {},
|
|
});
|
|
const user = new RecordView(users, undefined);
|
|
const count = users[2].length;
|
|
for (let i = 0; i < count; i++) {
|
|
user.index = i;
|
|
const email = user.get(clause.lookupColId);
|
|
const name = user.get('Name') || String(email).split('@')[0];
|
|
const access = user.has('Access') ? String(user.get('Access')) : 'editors';
|
|
result.push({
|
|
email: email ? String(email) : undefined,
|
|
name: name ? String(name) : undefined,
|
|
access: isValidRole(access) ? access : null, // 'null' -> null a bit circuitously
|
|
});
|
|
}
|
|
} catch (e) {
|
|
log.warn(`User attribute ${clause.name} failed`, e);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Get the role the session user has for this document. User may be overridden,
|
|
* in which case the role of the override is returned.
|
|
* The forkingAsOwner flag of docSession should not be respected for non-owners,
|
|
* so that the pseudo-ownership it offers is restricted to granular access within a
|
|
* document (as opposed to document-level operations).
|
|
*/
|
|
public async getNominalAccess(docSession: OptDocSession): Promise<Role|null> {
|
|
const linkParameters = docSession.authorizer?.getLinkParameters() || {};
|
|
const baseAccess = getDocSessionAccess(docSession);
|
|
if ((linkParameters.aclAsUserId || linkParameters.aclAsUser) && baseAccess === 'owners') {
|
|
const info = await this._getUser(docSession);
|
|
return info.Access;
|
|
}
|
|
return baseAccess;
|
|
}
|
|
|
|
// AddOrUpdateRecord requires broad read access to a table.
|
|
// But tables can be renamed, and access can be granted and removed
|
|
// within a bundle.
|
|
//
|
|
// For now, we forbid the combination of AddOrUpdateRecord and
|
|
// with actions other than other AddOrUpdateRecords, or simple data
|
|
// changes.
|
|
//
|
|
// Access rules and user attributes might change during the bundle.
|
|
// We deny based on access rights at the beginning of the bundle,
|
|
// as for _checkPossiblePythonFormulaModification. This is on the
|
|
// theory that someone who can change access rights can do anything.
|
|
//
|
|
// There might be uses for applying AddOrUpdateRecord in a nuanced
|
|
// way within the scope of what a user can read, but there's no easy
|
|
// way to do that within the data engine as currently
|
|
// formulated. Could perhaps be done for on-demand tables though.
|
|
private async _checkAddOrUpdateAccess(docSession: OptDocSession, actions: UserAction[]) {
|
|
if (!scanActionsRecursively(actions, (a) => a[0] === 'AddOrUpdateRecord')) {
|
|
// Don't need to apply this particular check.
|
|
return;
|
|
}
|
|
// Fail if being combined with anything fancy.
|
|
if (scanActionsRecursively(actions, (a) => {
|
|
const name = a[0];
|
|
return !['ApplyUndoActions', 'ApplyDocActions', 'AddOrUpdateRecord'].includes(String(name)) &&
|
|
!(isDataAction(a) && !getTableId(a).startsWith('_grist_'));
|
|
})) {
|
|
throw new Error('Can only combine AddOrUpdate with simple data changes');
|
|
}
|
|
// Check for read access, and that we're not touching metadata.
|
|
await applyToActionsRecursively(actions, async (a) => {
|
|
if (a[0] !== 'AddOrUpdateRecord') { return; }
|
|
const tableId = validTableIdString(a[1]);
|
|
if (tableId.startsWith('_grist_')) {
|
|
throw new Error(`AddOrUpdate cannot yet be used on metadata tables`);
|
|
}
|
|
const tableAccess = await this.getTableAccess(docSession, tableId);
|
|
accessChecks.fatal.read.throwIfNotFullyAllowed(tableAccess);
|
|
accessChecks.fatal.update.throwIfDenied(tableAccess);
|
|
accessChecks.fatal.create.throwIfDenied(tableAccess);
|
|
});
|
|
}
|
|
|
|
private async _checkPossiblePythonFormulaModification(docSession: OptDocSession, actions: UserAction[]) {
|
|
// If changes could include Python formulas, then user must have
|
|
// +S before we even consider passing these to the data engine.
|
|
// Since we don't track rule or schema changes at this stage, we
|
|
// approximate with the user's access rights at beginning of
|
|
// bundle.
|
|
if (scanActionsRecursively(actions, (a) => this.needEarlySchemaPermission(a))) {
|
|
await this._assertSchemaAccess(docSession);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Asserts that user has schema access.
|
|
*/
|
|
private async _assertSchemaAccess(docSession: OptDocSession) {
|
|
if (this._hasExceptionalFullAccess(docSession)) { return; }
|
|
const permInfo = await this._getAccess(docSession);
|
|
accessChecks.fatal.schemaEdit.throwIfDenied(permInfo.getFullAccess());
|
|
}
|
|
|
|
// The AccessCheck for the "read" permission is used enough to merit a shortcut.
|
|
// We just need to be careful to retain unfettered access for exceptional sessions.
|
|
private _readAccessCheck(docSession: OptDocSession): IAccessCheck {
|
|
return this._hasExceptionalFullAccess(docSession) ? dummyAccessCheck : accessChecks.check.read;
|
|
}
|
|
|
|
// Return true for special system sessions or document-creation sessions, where
|
|
// unfettered access is appropriate.
|
|
private _hasExceptionalFullAccess(docSession: OptDocSession): Boolean {
|
|
return docSession.mode === 'system' || docSession.mode === 'nascent';
|
|
}
|
|
|
|
/**
|
|
* This filters a message being broadcast to all clients to be appropriate for one
|
|
* particular client, if that client may need some material filtered out.
|
|
*/
|
|
private async _filterDocUpdate(docSession: OptDocSession, message: DocUpdateMessage) {
|
|
if (!this._activeBundle) { throw new Error('no active bundle'); }
|
|
const role = await this.getNominalAccess(docSession);
|
|
const result = {
|
|
...message,
|
|
docUsage: await this.filterDocUsageSummary(docSession, message.docUsage, {role}),
|
|
};
|
|
if (!this._ruler.haveRules() && !this._activeBundle.hasDeliberateRuleChange) {
|
|
return result;
|
|
}
|
|
result.actionGroup = await this.filterActionGroup(docSession, message.actionGroup, {role});
|
|
result.docActions = await this.filterOutgoingDocActions(docSession, message.docActions);
|
|
if (result.docActions.length === 0) { return null; }
|
|
return result;
|
|
}
|
|
|
|
private async _updateRules(docActions: DocAction[]) {
|
|
// If there is a rule change, redo from scratch for now.
|
|
// TODO: this is placeholder code. Should deal with connected clients.
|
|
if (docActions.some(docAction => isAclTable(getTableId(docAction)))) {
|
|
await this.update();
|
|
return;
|
|
}
|
|
if (!this._ruler.haveRules()) { return; }
|
|
// If there is a schema change, redo from scratch for now.
|
|
if (docActions.some(docAction => isSchemaAction(docAction))) {
|
|
await this.update();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Strip out any denied columns from an action. Returns null if nothing is left.
|
|
* accessCheck may throw if denials are fatal.
|
|
*/
|
|
private _pruneColumns(a: DocAction, permInfo: IPermissionInfo, tableId: string,
|
|
accessCheck: IAccessCheck): DocAction|null {
|
|
if (a[0] === 'RemoveRecord' || a[0] === 'BulkRemoveRecord') {
|
|
return a;
|
|
} else if (a[0] === 'AddRecord' || a[0] === 'BulkAddRecord' || a[0] === 'UpdateRecord' ||
|
|
a[0] === 'BulkUpdateRecord' || a[0] === 'ReplaceTableData' || a[0] === 'TableData') {
|
|
const na = cloneDeep(a);
|
|
this._filterColumns(na[3], (colId) => accessCheck.get(permInfo.getColumnAccess(tableId, colId)) !== 'deny');
|
|
if (Object.keys(na[3]).length === 0) { return null; }
|
|
return na;
|
|
} else if (a[0] === 'AddColumn' || a[0] === 'RemoveColumn' || a[0] === 'RenameColumn' ||
|
|
a[0] === 'ModifyColumn') {
|
|
const colId: string = a[2];
|
|
if (accessCheck.get(permInfo.getColumnAccess(tableId, colId)) === 'deny') { return null; }
|
|
} else {
|
|
// Remaining cases of AddTable, RemoveTable, RenameTable should have
|
|
// been handled at the table level.
|
|
}
|
|
return a;
|
|
}
|
|
|
|
/**
|
|
* Strip out any denied rows from an action. The action may be rewritten if rows
|
|
* become allowed or denied during the action. An action to add newly-allowed
|
|
* rows may be included, or an action to remove newly-forbidden rows. The result
|
|
* is a list rather than a single action. It may be the empty list.
|
|
*/
|
|
private async _pruneRows(cursor: ActionCursor): Promise<DocAction[]> {
|
|
const {action} = cursor;
|
|
// This only deals with Record-related actions.
|
|
if (!isDataAction(action)) { return [action]; }
|
|
|
|
// Get before/after state for this action. Broadcasts to other users can make use of the
|
|
// same state, so we share it (and only compute it if needed).
|
|
const {rowsBefore, rowsAfter} = await this._getRowsBeforeAndAfter(cursor);
|
|
|
|
// Figure out which rows were forbidden to this session before this action vs
|
|
// after this action. We need to know both so that we can infer the state of the
|
|
// client and send the correct change.
|
|
const orderedIds = getRowIdsFromDocAction(action);
|
|
const ids = new Set(orderedIds);
|
|
const forbiddenBefores = new Set(await this._getForbiddenRows(cursor, rowsBefore, ids));
|
|
const forbiddenAfters = new Set(await this._getForbiddenRows(cursor, rowsAfter, ids));
|
|
|
|
/**
|
|
* For rows forbidden before and after: just remove them.
|
|
* For rows allowed before and after: just leave them unchanged.
|
|
* For rows that were allowed before and are now forbidden:
|
|
* - strip them from the current action.
|
|
* - add a BulkRemoveRecord for them.
|
|
* For rows that were forbidden before and are now allowed:
|
|
* - remove them from the current action.
|
|
* - add a BulkAddRecord for them.
|
|
*/
|
|
|
|
const removals = new Set<number>(); // rows to remove from current action.
|
|
const forceAdds = new Set<number>(); // rows to add, that were previously stripped.
|
|
const forceRemoves = new Set<number>(); // rows to remove, that have become forbidden.
|
|
for (const id of ids) {
|
|
const forbiddenBefore = forbiddenBefores.has(id);
|
|
const forbiddenAfter = forbiddenAfters.has(id);
|
|
if (!forbiddenBefore && !forbiddenAfter) { continue; }
|
|
if (forbiddenBefore && forbiddenAfter) {
|
|
removals.add(id);
|
|
continue;
|
|
}
|
|
// If we reach here, then access right to the row changed and we have fancy footwork to do.
|
|
if (forbiddenBefore) {
|
|
// The row was forbidden and now is allowed. That's trivial if the row was just added.
|
|
if (action[0] === 'AddRecord' || action[0] === 'BulkAddRecord' ||
|
|
action[0] === 'ReplaceTableData' || action[0] === 'TableData') {
|
|
continue;
|
|
}
|
|
// Otherwise, strip the row from the current action.
|
|
removals.add(id);
|
|
if (action[0] === 'UpdateRecord' || action[0] === 'BulkUpdateRecord') {
|
|
// For updates, we need to send the entire row as an add, since the client
|
|
// doesn't know anything about it yet.
|
|
forceAdds.add(id);
|
|
} else {
|
|
// Remaining cases are [Bulk]RemoveRecord.
|
|
}
|
|
} else {
|
|
// The row was allowed and now is forbidden.
|
|
// If the action is a removal, that is just right.
|
|
if (action[0] === 'RemoveRecord' || action[0] === 'BulkRemoveRecord') { continue; }
|
|
// Otherwise, strip the row from the current action.
|
|
removals.add(id);
|
|
if (action[0] === 'UpdateRecord' || action[0] === 'BulkUpdateRecord') {
|
|
// For updates, we need to remove the entire row.
|
|
forceRemoves.add(id);
|
|
} else {
|
|
// Remaining cases are add-like actions.
|
|
}
|
|
}
|
|
}
|
|
// Execute our cunning plans for DocAction revisions.
|
|
const revisedDocActions = [
|
|
this._makeAdditions(rowsAfter, forceAdds),
|
|
this._removeRows(action, removals),
|
|
this._makeRemovals(rowsAfter, forceRemoves),
|
|
].filter(isNonNullish);
|
|
|
|
// Check whether there are column rules for this table, and if so whether they are row
|
|
// dependent. If so, we may need to update visibility of cells not mentioned in the
|
|
// original DocAction.
|
|
// No censorship is done here, all we do at this point is pull in any extra cells that need
|
|
// to be updated for the current client. Censorship for these cells, and any cells already
|
|
// present in the DocAction, is done by _filterRowsAndCells.
|
|
const ruler = await this._getRuler(cursor);
|
|
const tableId = getTableId(action);
|
|
const ruleSets = ruler.ruleCollection.getAllColumnRuleSets(tableId);
|
|
const colIds = new Set(([] as string[]).concat(
|
|
...ruleSets.map(ruleSet => ruleSet.colIds === '*' ? [] : ruleSet.colIds)
|
|
));
|
|
const access = await ruler.getAccess(cursor.docSession);
|
|
// Check columns in a consistent order, for determinism (easier testing).
|
|
// TODO: could pool some work between columns by doing them together rather than one by one.
|
|
for (const colId of [...colIds].sort()) {
|
|
// If the column is already in the DocAction, we can skip checking if we need to add it.
|
|
if (!action[3] || (colId in action[3])) { continue; }
|
|
// If the column is not row dependent, we have nothing to do.
|
|
if (access.getColumnAccess(tableId, colId).perms.read !== 'mixed') { continue; }
|
|
// Check column accessibility before and after.
|
|
const _forbiddenBefores = new Set(await this._getForbiddenRows(cursor, rowsBefore, ids, colId));
|
|
const _forbiddenAfters = new Set(await this._getForbiddenRows(cursor, rowsAfter, ids, colId));
|
|
// For any column that is in a visible row and for which accessibility has changed,
|
|
// pull it into the doc actions. We don't censor cells yet, that happens later
|
|
// (if that's what needs doing).
|
|
const changedIds = orderedIds.filter(id => !forceRemoves.has(id) && !removals.has(id) &&
|
|
(_forbiddenBefores.has(id) !== _forbiddenAfters.has(id)));
|
|
if (changedIds.length > 0) {
|
|
revisedDocActions.push(this._makeColumnUpdate(rowsAfter, colId, new Set(changedIds)));
|
|
}
|
|
}
|
|
|
|
// Return the results, also applying any cell-level access control.
|
|
const readAccessCheck = this._readAccessCheck(cursor.docSession);
|
|
const filteredDocActions: DocAction[] = [];
|
|
for (const a of revisedDocActions) {
|
|
const {filteredAction} =
|
|
await this._filterRowsAndCells({...cursor, action: a}, rowsAfter, rowsAfter, readAccessCheck,
|
|
{allowRowRemoval: false, copyOnModify: true});
|
|
if (filteredAction) { filteredDocActions.push(filteredAction); }
|
|
}
|
|
return filteredDocActions;
|
|
}
|
|
|
|
/**
|
|
* Like _pruneRows, but fails immediately if access to any row is forbidden.
|
|
* The accessCheck supplied should throw an error on denial.
|
|
*/
|
|
private async _checkRows(cursor: ActionCursor, accessCheck: IAccessCheck): Promise<void> {
|
|
const {action} = cursor;
|
|
// This check applies to data changes only.
|
|
if (!isDataAction(action)) { return; }
|
|
const {rowsBefore, rowsAfter} = await this._getRowsForRecAndNewRec(cursor);
|
|
// If any change is needed, this call will fail immediately because we are using
|
|
// access checks that throw.
|
|
await this._filterRowsAndCells(cursor, rowsBefore, rowsAfter, accessCheck,
|
|
{allowRowRemoval: false});
|
|
}
|
|
|
|
private async _getRowsBeforeAndAfter(cursor: ActionCursor) {
|
|
const {rowsBefore, rowsAfter} = await this._getStep(cursor);
|
|
if (!rowsBefore || !rowsAfter) { throw new Error('Logic error: no rows available'); }
|
|
return {rowsBefore, rowsAfter};
|
|
}
|
|
|
|
private async _getRowsForRecAndNewRec(cursor: ActionCursor) {
|
|
const steps = await this._getSteps();
|
|
if (cursor.actionIdx === null) { throw new Error('No step available'); }
|
|
const {rowsBefore, rowsLast} = steps[cursor.actionIdx];
|
|
if (!rowsBefore) { throw new Error('Logic error: no previous rows available'); }
|
|
if (rowsLast) {
|
|
return {rowsBefore, rowsAfter: rowsLast};
|
|
}
|
|
// When determining whether to apply an action, we choose to make newRec refer to the
|
|
// state at the end of the entire bundle. So we look for the last pair of row snapshots
|
|
// for the same table.
|
|
// TODO: there's a problem that this could alias rows if row ids were reused within the
|
|
// same bundle. It is kind of a slippery idea. Likewise, column renames are slippery.
|
|
// We could solve a lot of slipperiness by having newRec not transition across schema
|
|
// changes, but we don't really have the option because formula updates happen late.
|
|
let tableId = getTableId(rowsBefore);
|
|
let last = cursor.actionIdx;
|
|
for (let i = last + 1; i < steps.length; i++) {
|
|
const act = steps[i].action;
|
|
if (getTableId(act) !== tableId) { continue; }
|
|
if (act[0] === 'RenameTable') {
|
|
tableId = act[2];
|
|
continue;
|
|
}
|
|
last = i;
|
|
}
|
|
const rowsAfter = steps[cursor.actionIdx].rowsLast = steps[last].rowsAfter;
|
|
if (!rowsAfter) { throw new Error('Logic error: no next rows available'); }
|
|
return {rowsBefore, rowsAfter};
|
|
}
|
|
|
|
/**
|
|
* Scrub any rows and cells to which access is not granted from an
|
|
* action. Returns filteredAction, which is the provided action, a
|
|
* modified copy of the provided action, or null. It is null if the
|
|
* action was entirely eliminated (and was not a bulk action). It is
|
|
* a modified copy if any scrubbing was needed and copyOnModify is
|
|
* set, otherwise the original is modified in place.
|
|
*
|
|
* Also returns censoredRows, a set of indexes of rows that have a
|
|
* censored value in them.
|
|
*
|
|
* If allowRowRemoval is false, then rows will not be removed, and if the user
|
|
* does not have access to a row and the action itself is not a remove action, then
|
|
* an error will be thrown. This flag setting is used when filtering outgoing
|
|
* actions, where actions need rewriting elsewhere to reflect access changes to
|
|
* rows for each individual client.
|
|
*/
|
|
private async _filterRowsAndCells(cursor: ActionCursor, rowsBefore: TableDataAction, rowsAfter: TableDataAction,
|
|
accessCheck: IAccessCheck,
|
|
options: {
|
|
allowRowRemoval?: boolean,
|
|
copyOnModify?: boolean,
|
|
}): Promise<{
|
|
filteredAction: DocAction | null,
|
|
censoredRows: Set<number>
|
|
}> {
|
|
const censoredRows = new Set<number>();
|
|
const ruler = await this._getRuler(cursor);
|
|
const {docSession, action} = cursor;
|
|
if (action && isSchemaAction(action)) {
|
|
return {filteredAction: action, censoredRows};
|
|
}
|
|
let filteredAction: DocAction | null = action;
|
|
|
|
// For user convenience, for creations and deletions we equate rec and newRec.
|
|
// This makes writing rules that control multiple permissions easier to write in
|
|
// practice.
|
|
let rowsRec = rowsBefore;
|
|
let rowsNewRec = rowsAfter;
|
|
if (isAddRecordAction(action)) {
|
|
rowsRec = rowsAfter;
|
|
} else if (isRemoveRecordAction(action)) {
|
|
rowsNewRec = rowsBefore;
|
|
}
|
|
|
|
const rec = new RecordView(rowsRec, undefined);
|
|
const newRec = new RecordView(rowsNewRec, undefined);
|
|
const input: AclMatchInput = {user: await this._getUser(docSession), rec, newRec};
|
|
|
|
const [, tableId, , colValues] = action;
|
|
let filteredColValues: ColValues | BulkColValues | undefined | null = null;
|
|
const rowIds = getRowIdsFromDocAction(action);
|
|
const toRemove: number[] = [];
|
|
|
|
// Call this to make sure we are modifying a copy, not the original, if copyOnModify is set.
|
|
const copyOnNeed = () => {
|
|
if (filteredColValues === null) {
|
|
filteredAction = options?.copyOnModify ? cloneDeep(action) : action;
|
|
filteredColValues = filteredAction[3];
|
|
}
|
|
return filteredColValues;
|
|
};
|
|
let censorAt: (colId: string, idx: number) => void;
|
|
if (colValues === undefined) {
|
|
censorAt = () => 1;
|
|
} else if (Array.isArray(action[2])) {
|
|
censorAt = (colId, idx) => (copyOnNeed() as BulkColValues)[colId][idx] = [GristObjCode.Censored];
|
|
} else {
|
|
censorAt = (colId) => (copyOnNeed() as ColValues)[colId] = [GristObjCode.Censored];
|
|
}
|
|
|
|
// These map an index of a row in the action to its index in rowsBefore and in rowsAfter.
|
|
let getRecIndex: (idx: number) => number|undefined = (idx) => idx;
|
|
let getNewRecIndex: (idx: number) => number|undefined = (idx) => idx;
|
|
if (action !== rowsRec) {
|
|
const recIndexes = new Map(rowsRec[2].map((rowId, idx) => [rowId, idx]));
|
|
getRecIndex = (idx) => recIndexes.get(rowIds[idx]);
|
|
}
|
|
if (action !== rowsNewRec) {
|
|
const newRecIndexes = new Map(rowsNewRec[2].map((rowId, idx) => [rowId, idx]));
|
|
getNewRecIndex = (idx) => newRecIndexes.get(rowIds[idx]);
|
|
}
|
|
|
|
for (let idx = 0; idx < rowIds.length; idx++) {
|
|
rec.index = getRecIndex(idx);
|
|
newRec.index = getNewRecIndex(idx);
|
|
|
|
const rowPermInfo = new PermissionInfo(ruler.ruleCollection, input);
|
|
// getTableAccess() evaluates all column rules for THIS record. So it's really rowAccess.
|
|
const rowAccess = rowPermInfo.getTableAccess(tableId);
|
|
const access = accessCheck.get(rowAccess);
|
|
if (access === 'deny') {
|
|
toRemove.push(idx);
|
|
} else if (access !== 'allow' && colValues) {
|
|
// Go over column rules.
|
|
for (const colId of Object.keys(colValues)) {
|
|
const colAccess = rowPermInfo.getColumnAccess(tableId, colId);
|
|
if (accessCheck.get(colAccess) === 'deny') {
|
|
censorAt(colId, idx);
|
|
censoredRows.add(idx);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (toRemove.length > 0) {
|
|
if (options.allowRowRemoval) {
|
|
copyOnNeed();
|
|
if (Array.isArray(filteredAction[2])) {
|
|
this._removeRowsAt(toRemove, filteredAction[2], filteredAction[3]);
|
|
} else {
|
|
filteredAction = null;
|
|
}
|
|
} else {
|
|
// Artificially introduced removals are ok, otherwise this is suspect.
|
|
if (filteredAction[0] !== 'RemoveRecord' && filteredAction[0] !== 'BulkRemoveRecord') {
|
|
throw new Error('Unexpected row removal');
|
|
}
|
|
}
|
|
}
|
|
return {filteredAction, censoredRows};
|
|
}
|
|
|
|
// Compute which of the row ids supplied are for rows forbidden for this session.
|
|
// If colId is supplied, check instead whether that specific column is forbidden.
|
|
private async _getForbiddenRows(cursor: ActionCursor, data: TableDataAction, ids: Set<number>,
|
|
colId?: string): Promise<number[]> {
|
|
const ruler = await this._getRuler(cursor);
|
|
const rec = new RecordView(data, undefined);
|
|
const input: AclMatchInput = {user: await this._getUser(cursor.docSession), rec};
|
|
|
|
const [, tableId, rowIds] = data;
|
|
const toRemove: number[] = [];
|
|
for (let idx = 0; idx < rowIds.length; idx++) {
|
|
rec.index = idx;
|
|
if (!ids.has(rowIds[idx])) { continue; }
|
|
|
|
const rowPermInfo = new PermissionInfo(ruler.ruleCollection, input);
|
|
// getTableAccess() evaluates all column rules for THIS record. So it's really rowAccess.
|
|
const rowAccess = rowPermInfo.getTableAccess(tableId);
|
|
if (!colId) {
|
|
if (this.getReadPermission(rowAccess) === 'deny') {
|
|
toRemove.push(rowIds[idx]);
|
|
}
|
|
} else {
|
|
const colAccess = rowPermInfo.getColumnAccess(tableId, colId);
|
|
if (this.getReadPermission(colAccess) === 'deny') {
|
|
toRemove.push(rowIds[idx]);
|
|
}
|
|
}
|
|
}
|
|
return toRemove;
|
|
}
|
|
|
|
/**
|
|
* Removes the toRemove rows (indexes, not row ids) from the rowIds list and from
|
|
* the colValues structure.
|
|
*
|
|
* toRemove must be sorted, lowest to highest.
|
|
*/
|
|
private _removeRowsAt(toRemove: number[], rowIds: number[], colValues: BulkColValues|ColValues|undefined) {
|
|
if (toRemove.length > 0) {
|
|
pruneArray(rowIds, toRemove);
|
|
if (colValues) {
|
|
for (const values of Object.values(colValues)) {
|
|
pruneArray(values, toRemove);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Remove columns from a ColumnValues parameter of certain DocActions, using a predicate for
|
|
* which columns to keep.
|
|
* Will retain manualSort columns regardless of wildcards.
|
|
*/
|
|
private _filterColumns(data: BulkColValues|ColValues, shouldInclude: (colId: string) => boolean) {
|
|
for (const colId of Object.keys(data)) {
|
|
if (colId !== 'manualSort' && !shouldInclude(colId)) {
|
|
delete data[colId];
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get PermissionInfo for the user represented by the given docSession. The returned object
|
|
* allows evaluating access level as far as possible without considering specific records.
|
|
*
|
|
* The result is cached in a WeakMap, and PermissionInfo does its own caching, so multiple calls
|
|
* to this._getAccess(docSession).someMethod() will reuse already-evaluated results.
|
|
*/
|
|
private async _getAccess(docSession: OptDocSession): Promise<PermissionInfo> {
|
|
// TODO The intent of caching is to avoid duplicating rule evaluations while processing a
|
|
// single request. Caching based on docSession is riskier since those persist across requests.
|
|
return this._ruler.getAccess(docSession);
|
|
}
|
|
|
|
private _getUserAttributes(docSession: OptDocSession): UserAttributes {
|
|
// TODO Same caching intent and caveat as for _getAccess
|
|
return getSetMapValue(this._userAttributesMap as Map<OptDocSession, UserAttributes>, docSession,
|
|
() => new UserAttributes());
|
|
}
|
|
|
|
/**
|
|
* Check whether user attributes have changed. If so, prompt client
|
|
* to reload the document, since we aren't sophisticated enough to
|
|
* figure out the changes to send.
|
|
*/
|
|
private async _checkUserAttributes(docSession: OptDocSession) {
|
|
if (!this._prevUserAttributesMap) { return; }
|
|
const userAttrBefore = this._prevUserAttributesMap.get(docSession);
|
|
if (!userAttrBefore) { return; }
|
|
await this._getAccess(docSession); // Makes sure user attrs have actually been computed.
|
|
const userAttrAfter = this._getUserAttributes(docSession);
|
|
for (const [tableId, rec] of Object.entries(userAttrAfter.rows)) {
|
|
const prev = userAttrBefore.rows[tableId];
|
|
if (!prev || JSON.stringify(prev.toJSON()) !== JSON.stringify(rec.toJSON())) {
|
|
throw new ErrorWithCode('NEED_RELOAD', 'document needs reload, user attributes changed');
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Construct the UserInfo needed for evaluating rules. This also enriches the user with values
|
|
* created by user-attribute rules.
|
|
*/
|
|
private async _getUser(docSession: OptDocSession): Promise<UserInfo> {
|
|
const linkParameters = docSession.authorizer?.getLinkParameters() || {};
|
|
let access: Role | null;
|
|
let fullUser: FullUser | null;
|
|
const attrs = this._getUserAttributes(docSession);
|
|
access = getDocSessionAccess(docSession);
|
|
|
|
if (docSession.forkingAsOwner) {
|
|
// For granular access purposes, we become an owner.
|
|
// It is a bit of a bluff, done on the understanding that this session will
|
|
// never be used to edit the document, and that any edits will be done on a
|
|
// fork.
|
|
access = 'owners';
|
|
}
|
|
|
|
// If aclAsUserId/aclAsUser is set, then override user for acl purposes.
|
|
if (linkParameters.aclAsUserId || linkParameters.aclAsUser) {
|
|
if (access !== 'owners') { throw new ErrorWithCode('ACL_DENY', 'only an owner can override user'); }
|
|
if (attrs.override) {
|
|
// Used cached properties.
|
|
access = attrs.override.access;
|
|
fullUser = attrs.override.user;
|
|
} else {
|
|
attrs.override = await this._getViewAsUser(linkParameters);
|
|
fullUser = attrs.override.user;
|
|
}
|
|
} else {
|
|
fullUser = getDocSessionUser(docSession);
|
|
}
|
|
const user = new User();
|
|
user.Access = access;
|
|
const isAnonymous = fullUser?.id === this._homeDbManager?.getAnonymousUserId() ||
|
|
fullUser?.id === null;
|
|
user.UserID = (!isAnonymous && fullUser?.id) || null;
|
|
user.Email = fullUser?.email || null;
|
|
user.Name = fullUser?.name || null;
|
|
// If viewed from a websocket, collect any link parameters included.
|
|
// TODO: could also get this from rest api access, just via a different route.
|
|
user.LinkKey = linkParameters;
|
|
// Include origin info if accessed via the rest api.
|
|
// TODO: could also get this for websocket access, just via a different route.
|
|
user.Origin = docSession.req?.get('origin') || null;
|
|
user.SessionID = isAnonymous ? `a${getDocSessionAltSessionId(docSession)}` : `u${user.UserID}`;
|
|
user.IsLoggedIn = !isAnonymous;
|
|
|
|
if (this._ruler.ruleCollection.ruleError && !this._recoveryMode) {
|
|
// It is important to signal that the doc is in an unexpected state,
|
|
// and prevent it opening.
|
|
throw this._ruler.ruleCollection.ruleError;
|
|
}
|
|
|
|
for (const clause of this._ruler.ruleCollection.getUserAttributeRules().values()) {
|
|
if (clause.name in user) {
|
|
log.warn(`User attribute ${clause.name} ignored; conflicts with an existing one`);
|
|
continue;
|
|
}
|
|
if (attrs.rows[clause.name]) {
|
|
user[clause.name] = attrs.rows[clause.name];
|
|
continue;
|
|
}
|
|
let rec = new EmptyRecordView();
|
|
let rows: TableDataAction|undefined;
|
|
try {
|
|
// Use lodash's get() that supports paths, e.g. charId of 'a.b' would look up `user.a.b`.
|
|
// TODO: add indexes to db.
|
|
rows = await this._fetchQueryFromDB({
|
|
tableId: clause.tableId,
|
|
filters: { [clause.lookupColId]: [get(user, clause.charId)] }
|
|
});
|
|
} catch (e) {
|
|
log.warn(`User attribute ${clause.name} failed`, e);
|
|
}
|
|
if (rows && rows[2].length > 0) { rec = new RecordView(rows, 0); }
|
|
user[clause.name] = rec;
|
|
attrs.rows[clause.name] = rec;
|
|
}
|
|
return user;
|
|
}
|
|
|
|
/**
|
|
* Get the "View As" user specified in link parameters.
|
|
* If aclAsUserId is set, we get the user with the specified id.
|
|
* If aclAsUser is set, we get the user with the specified email,
|
|
* from the database if possible, otherwise from user attribute
|
|
* tables or examples.
|
|
*/
|
|
private async _getViewAsUser(linkParameters: Record<string, string>): Promise<UserOverride> {
|
|
// Look up user information in database.
|
|
if (!this._homeDbManager) { throw new Error('database required'); }
|
|
const dbUser = linkParameters.aclAsUserId ?
|
|
(await this._homeDbManager.getUser(integerParam(linkParameters.aclAsUserId, 'aclAsUserId'))) :
|
|
(await this._homeDbManager.getExistingUserByLogin(linkParameters.aclAsUser));
|
|
if (!dbUser && linkParameters.aclAsUser) {
|
|
// Look further for the user, in user attribute tables or examples.
|
|
const otherUsers = (await this.collectViewAsUsersFromUserAttributeTables())
|
|
.concat(this.getExampleViewAsUsers());
|
|
const email = normalizeEmail(linkParameters.aclAsUser);
|
|
const dummyUser = otherUsers.find(user => normalizeEmail(user?.email || '') === email);
|
|
if (dummyUser) {
|
|
return {
|
|
access: dummyUser.access || null,
|
|
user: {
|
|
id: -1,
|
|
email: dummyUser.email!,
|
|
name: dummyUser.name || dummyUser.email!,
|
|
}
|
|
};
|
|
}
|
|
}
|
|
const docAuth = dbUser && await this._homeDbManager.getDocAuthCached({
|
|
urlId: this._docId,
|
|
userId: dbUser.id
|
|
});
|
|
const access = docAuth?.access || null;
|
|
const user = dbUser && this._homeDbManager.makeFullUser(dbUser) || null;
|
|
return { access, user };
|
|
}
|
|
|
|
/**
|
|
* Remove a set of rows from a DocAction. If the DocAction ends up empty, null is returned.
|
|
* If the DocAction needs modification, it is copied first - the original is never
|
|
* changed.
|
|
*/
|
|
private _removeRows(a: DocAction, rowIds: Set<number>): DocAction|null {
|
|
// If there are no rows, there's nothing to do.
|
|
if (isSchemaAction(a)) { return a; }
|
|
if (a[0] === 'AddRecord' || a[0] === 'UpdateRecord' || a[0] === 'RemoveRecord') {
|
|
return rowIds.has(a[2]) ? null : a;
|
|
}
|
|
const na = cloneDeep(a);
|
|
const [, , oldIds, bulkColValues] = na;
|
|
const mask = oldIds.map((id, idx) => rowIds.has(id) ? idx : false).filter(v => v !== false) as number[];
|
|
this._removeRowsAt(mask, oldIds, bulkColValues);
|
|
if (oldIds.length === 0) { return null; }
|
|
return na;
|
|
}
|
|
|
|
/**
|
|
* Make a BulkAddRecord for a set of rows.
|
|
*/
|
|
private _makeAdditions(data: TableDataAction, rowIds: Set<number>): BulkAddRecord|null {
|
|
if (rowIds.size === 0) { return null; }
|
|
// TODO: optimize implementation, this does an unnecessary clone.
|
|
const notAdded = data[2].filter(id => !rowIds.has(id));
|
|
const partialData = this._removeRows(data, new Set(notAdded)) as TableDataAction|null;
|
|
if (partialData === null) { return partialData; }
|
|
return ['BulkAddRecord', partialData[1], partialData[2], partialData[3]];
|
|
}
|
|
|
|
/**
|
|
* Make a BulkRemoveRecord for a set of rows.
|
|
*/
|
|
private _makeRemovals(data: TableDataAction, rowIds: Set<number>): BulkRemoveRecord|null {
|
|
if (rowIds.size === 0) { return null; }
|
|
return ['BulkRemoveRecord', getTableId(data), [...rowIds]];
|
|
}
|
|
|
|
/**
|
|
* Make a BulkUpdateRecord for a particular column across a set of rows.
|
|
*/
|
|
private _makeColumnUpdate(data: TableDataAction, colId: string, rowIds: Set<number>): BulkUpdateRecord {
|
|
const dataRowIds = data[2];
|
|
const selectedRowIds = dataRowIds.filter(r => rowIds.has(r));
|
|
const colData = data[3][colId].filter((value, idx) => rowIds.has(dataRowIds[idx]));
|
|
return ['BulkUpdateRecord', getTableId(data), selectedRowIds, {[colId]: colData}];
|
|
}
|
|
|
|
private async _getSteps(): Promise<Array<ActionStep>> {
|
|
if (!this._steps) {
|
|
this._steps = this._getUncachedSteps().catch(e => {
|
|
log.error('step computation failed:', e);
|
|
throw e;
|
|
});
|
|
}
|
|
return this._steps;
|
|
}
|
|
|
|
private async _getMetaSteps(): Promise<Array<MetaStep>> {
|
|
if (!this._metaSteps) {
|
|
this._metaSteps = this._getUncachedMetaSteps().catch(e => {
|
|
log.error('meta step computation failed:', e);
|
|
throw e;
|
|
});
|
|
}
|
|
return this._metaSteps;
|
|
}
|
|
|
|
/**
|
|
* Prepare to compute intermediate states of rows, as
|
|
* this._steps. The computation should happen only if
|
|
* needed, which depends on the rules and actions. The computation
|
|
* uses the state of the database, and so depends on whether the
|
|
* docActions have already been applied to the database or not, as
|
|
* determined by the this._applied flag, which should never be
|
|
* changed during any possible use of this._steps.
|
|
*/
|
|
private async _getUncachedSteps(): Promise<Array<ActionStep>> {
|
|
if (!this._activeBundle) { throw new Error('no active bundle'); }
|
|
const {docActions, undo, applied} = this._activeBundle;
|
|
// For row access work, we'll need to know the state of affected rows before and
|
|
// after the actions.
|
|
// First figure out what rows in which tables are touched during the actions.
|
|
const rows = new Map(getRelatedRows(applied ? [...undo].reverse() : docActions));
|
|
// Populate a minimal in-memory version of the database with these rows.
|
|
const docData = new DocData(
|
|
(tableId) => this._fetchQueryFromDB({tableId, filters: {id: [...rows.get(tableId)!]}}),
|
|
null,
|
|
);
|
|
// Load pre-existing rows touched by the bundle.
|
|
await Promise.all([...rows.keys()].map(tableId => docData.syncTable(tableId)));
|
|
if (applied) {
|
|
// Apply the undo actions, since the docActions have already been applied to the db.
|
|
for (const docAction of [...undo].reverse()) { docData.receiveAction(docAction); }
|
|
}
|
|
|
|
// Now step forward, storing the before and after state for the table
|
|
// involved in each action. We'll use this to compute row access changes.
|
|
// For simple changes, the rows will be just the minimal set needed.
|
|
// This could definitely be optimized. E.g. for pure table updates, these
|
|
// states could be extracted while applying undo actions, with no need for
|
|
// a forward pass. And for a series of updates to the same table, there'll
|
|
// be duplicated before/after states that could be optimized.
|
|
const steps = new Array<ActionStep>();
|
|
for (const docAction of docActions) {
|
|
const tableId = getTableId(docAction);
|
|
const tableData = docData.getTable(tableId);
|
|
const rowsBefore = cloneDeep(tableData?.getTableDataAction() || ['TableData', '', [], {}] as TableDataAction);
|
|
docData.receiveAction(docAction);
|
|
// If table is deleted, state afterwards doesn't matter.
|
|
const rowsAfter = docData.getTable(tableId) ?
|
|
cloneDeep(tableData?.getTableDataAction() || ['TableData', '', [], {}] as TableDataAction) :
|
|
rowsBefore;
|
|
const step: ActionStep = {action: docAction, rowsBefore, rowsAfter};
|
|
steps.push(step);
|
|
}
|
|
return steps;
|
|
}
|
|
|
|
/**
|
|
* Prepare to compute intermediate metadata and rules, as this._metaSteps.
|
|
*/
|
|
private async _getUncachedMetaSteps(): Promise<Array<MetaStep>> {
|
|
if (!this._activeBundle) { throw new Error('no active bundle'); }
|
|
const {docActions, undo, applied} = this._activeBundle;
|
|
|
|
const needMeta = docActions.some(a => isSchemaAction(a) || getTableId(a).startsWith('_grist_'));
|
|
if (!needMeta) {
|
|
// Sometimes, the intermediate states are trivial.
|
|
return docActions.map(action => ({action}));
|
|
}
|
|
const metaDocData = new DocData(
|
|
async (tableId) => {
|
|
const result = this._docData.getTable(tableId)?.getTableDataAction();
|
|
if (!result) { throw new Error('surprising load'); }
|
|
return result;
|
|
},
|
|
null,
|
|
);
|
|
// Read the structural tables.
|
|
await Promise.all([...STRUCTURAL_TABLES].map(tableId => metaDocData.syncTable(tableId)));
|
|
if (applied) {
|
|
for (const docAction of [...undo].reverse()) { metaDocData.receiveAction(docAction); }
|
|
}
|
|
let meta = {} as {[key: string]: TableDataAction};
|
|
// Metadata is stored as a hash of TableDataActions.
|
|
for (const tableId of STRUCTURAL_TABLES) {
|
|
meta[tableId] = cloneDeep(metaDocData.getTable(tableId)!.getTableDataAction());
|
|
}
|
|
|
|
// Now step forward, tracking metadata and rules through any changes that occur.
|
|
const steps = new Array<MetaStep>();
|
|
let ruler = this._ruler;
|
|
if (applied) {
|
|
// Rules may have changed - back them off to a copy of their original state.
|
|
ruler = new Ruler(this);
|
|
await ruler.update(metaDocData);
|
|
}
|
|
let replaceRuler = false;
|
|
for (const docAction of docActions) {
|
|
const tableId = getTableId(docAction);
|
|
const step: MetaStep = {action: docAction};
|
|
step.metaBefore = meta;
|
|
if (STRUCTURAL_TABLES.has(tableId)) {
|
|
metaDocData.receiveAction(docAction);
|
|
// make shallow copy of all tables
|
|
meta = {...meta};
|
|
// replace table just modified with a deep copy
|
|
meta[tableId] = cloneDeep(metaDocData.getTable(tableId)!.getTableDataAction());
|
|
}
|
|
step.metaAfter = meta;
|
|
// replaceRuler logic avoids updating rules between paired changes of resources and rules.
|
|
if (isAclTable(tableId)) {
|
|
replaceRuler = true;
|
|
} else if (replaceRuler) {
|
|
ruler = new Ruler(this);
|
|
await ruler.update(metaDocData);
|
|
replaceRuler = false;
|
|
}
|
|
step.ruler = ruler;
|
|
steps.push(step);
|
|
}
|
|
return steps;
|
|
}
|
|
|
|
/**
|
|
* Return any permitted parts of an action. A completely forbidden
|
|
* action results in an empty list. Forbidden columns and rows will
|
|
* be stripped from a returned action. Rows with forbidden cells are
|
|
* extracted and returned in distinct actions (since they will have
|
|
* a distinct set of columns).
|
|
*
|
|
* This method should only be called with data actions, and will throw
|
|
* for anything else.
|
|
*/
|
|
private async _prefilterDocAction(cursor: ActionCursor): Promise<DocAction[]> {
|
|
const {action, docSession} = cursor;
|
|
const tableId = getTableId(action);
|
|
const permInfo = await this._getStepAccess(cursor);
|
|
const tableAccess = permInfo.getTableAccess(tableId);
|
|
const accessCheck = await this._getAccessForActionType(docSession, action, 'check');
|
|
const access = accessCheck.get(tableAccess);
|
|
if (access === 'deny') {
|
|
// Filter out this action entirely.
|
|
return [];
|
|
} else if (access === 'allow') {
|
|
// Retain this action entirely.
|
|
return [action];
|
|
} else if (access === 'mixedColumns') {
|
|
// Retain some or all columns entirely.
|
|
const act = this._pruneColumns(action, permInfo, tableId, accessCheck);
|
|
return act ? [act] : [];
|
|
}
|
|
// The remainder is the mixed condition.
|
|
|
|
const {rowsBefore, rowsAfter} = await this._getRowsForRecAndNewRec(cursor);
|
|
const {censoredRows, filteredAction} = await this._filterRowsAndCells({...cursor, action: cloneDeep(action)},
|
|
rowsBefore, rowsAfter, accessCheck,
|
|
{allowRowRemoval: true});
|
|
if (filteredAction === null) {
|
|
return [];
|
|
}
|
|
if (!isDataAction(filteredAction)) {
|
|
throw new Error('_prefilterDocAction called with unexpected action');
|
|
}
|
|
if (isRemoveRecordAction(filteredAction)) {
|
|
// removals do not mention columns or cells, so no further complications.
|
|
return [filteredAction];
|
|
}
|
|
|
|
// Strip any forbidden columns.
|
|
this._filterColumns(
|
|
filteredAction[3],
|
|
(colId) => accessCheck.get(permInfo.getColumnAccess(tableId, colId)) !== 'deny');
|
|
if (censoredRows.size === 0) {
|
|
// no cell censorship, so no further complications.
|
|
return [filteredAction];
|
|
}
|
|
|
|
return filterColValues(filteredAction, (idx) => censoredRows.has(idx), isCensored);
|
|
}
|
|
|
|
/**
|
|
* Tailor the information about a change reported to a given client. The action passed in
|
|
* is never modified. The actions output may differ in the following ways:
|
|
* - Tables, columns or rows may be omitted if the client does not have access to them.
|
|
* - Columns in structural metadata tables may be cleared if the client does not have
|
|
* access to the resources they relate to.
|
|
* - Columns in the _grist_Views table may be cleared or uncleared depending on changes
|
|
* in other metadata tables.
|
|
* - Rows may be inserted if the client newly acquires access to them via an update.
|
|
* TODO: I think that column rules controlling READ access using rec are not fully supported
|
|
* yet. They work on first load, but if READ access is lost/gained updates won't be made.
|
|
*/
|
|
private async _filterOutgoingDocAction(cursor: ActionCursor): Promise<DocAction[]> {
|
|
const {action} = cursor;
|
|
const tableId = getTableId(action);
|
|
const permInfo = await this._getStepAccess(cursor);
|
|
const tableAccess = permInfo.getTableAccess(tableId);
|
|
const access = this.getReadPermission(tableAccess);
|
|
const readAccessCheck = this._readAccessCheck(cursor.docSession);
|
|
const results: DocAction[] = [];
|
|
if (access === 'deny') {
|
|
// filter out this data.
|
|
} else if (access === 'allow') {
|
|
results.push(action);
|
|
} else if (access === 'mixedColumns') {
|
|
const act = this._pruneColumns(action, permInfo, tableId, readAccessCheck);
|
|
if (act) { results.push(act); }
|
|
} else {
|
|
// The remainder is the mixed condition.
|
|
for (const act of await this._pruneRows(cursor)) {
|
|
const prunedAct = this._pruneColumns(act, permInfo, tableId, readAccessCheck);
|
|
if (prunedAct) { results.push(prunedAct); }
|
|
}
|
|
}
|
|
const secondPass: DocAction[] = [];
|
|
for (const act of results) {
|
|
if (STRUCTURAL_TABLES.has(getTableId(act)) && isDataAction(act)) {
|
|
await this._filterOutgoingStructuralTables(cursor, act, secondPass);
|
|
} else {
|
|
secondPass.push(act);
|
|
}
|
|
}
|
|
return secondPass;
|
|
}
|
|
|
|
private async _filterOutgoingStructuralTables(cursor: ActionCursor, act: DataAction, results: DocAction[]) {
|
|
// Filter out sensitive columns from tables.
|
|
const permissionInfo = await this._getStepAccess(cursor);
|
|
const step = await this._getMetaStep(cursor);
|
|
if (!step.metaAfter) { throw new Error('missing metadata'); }
|
|
act = cloneDeep(act); // Don't change original action.
|
|
const ruler = await this._getRuler(cursor);
|
|
const censor = new CensorshipInfo(permissionInfo,
|
|
ruler.ruleCollection,
|
|
step.metaAfter,
|
|
await this.hasAccessRulesPermission(cursor.docSession));
|
|
if (censor.apply(act)) {
|
|
results.push(act);
|
|
}
|
|
|
|
// There's a wrinkle to deal with. If we just added or removed a section, we need to
|
|
// reconsider whether the view containing it is visible.
|
|
if (getTableId(act) === '_grist_Views_section') {
|
|
if (!step.metaBefore) { throw new Error('missing prior metadata'); }
|
|
const censorBefore = new CensorshipInfo(permissionInfo,
|
|
ruler.ruleCollection,
|
|
step.metaBefore,
|
|
await this.hasAccessRulesPermission(cursor.docSession));
|
|
// For all views previously censored, if they are now uncensored,
|
|
// add an UpdateRecord to expose them.
|
|
for (const v of censorBefore.censoredViews) {
|
|
if (!censor.censoredViews.has(v)) {
|
|
const table = step.metaAfter._grist_Views;
|
|
const idx = table[2].indexOf(v);
|
|
const name = table[3].name[idx];
|
|
results.push(['UpdateRecord', '_grist_Views', v, {name}]);
|
|
}
|
|
}
|
|
// For all views currently censored, if they were previously uncensored,
|
|
// add an UpdateRecord to censor them.
|
|
for (const v of censor.censoredViews) {
|
|
if (!censorBefore.censoredViews.has(v)) {
|
|
results.push(['UpdateRecord', '_grist_Views', v, {name: ''}]);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
private async _checkIncomingDocAction(cursor: ActionCursor): Promise<void> {
|
|
const {action, docSession} = cursor;
|
|
const accessCheck = await this._getAccessForActionType(docSession, action, 'fatal');
|
|
const tableId = getTableId(action);
|
|
const permInfo = await this._getStepAccess(cursor);
|
|
const tableAccess = permInfo.getTableAccess(tableId);
|
|
const access = accessCheck.get(tableAccess);
|
|
if (access === 'allow') { return; }
|
|
if (access === 'mixed') {
|
|
// Deal with row-level access for the mixed condition.
|
|
await this._checkRows(cursor, accessCheck);
|
|
}
|
|
// Somewhat abusing prune method by calling it with an access function that
|
|
// throws on denial.
|
|
this._pruneColumns(action, permInfo, tableId, accessCheck);
|
|
}
|
|
|
|
private async _getRuler(cursor: ActionCursor) {
|
|
if (cursor.actionIdx === null) { return this._ruler; }
|
|
const step = await this._getMetaStep(cursor);
|
|
return step.ruler || this._ruler;
|
|
}
|
|
|
|
private async _getStepAccess(cursor: ActionCursor) {
|
|
if (!this._activeBundle) { throw new Error('no active bundle'); }
|
|
if (this._activeBundle.hasAnyRuleChange) {
|
|
const step = await this._getMetaStep(cursor);
|
|
if (step.ruler) { return step.ruler.getAccess(cursor.docSession); }
|
|
}
|
|
// No rule changes!
|
|
return this._getAccess(cursor.docSession);
|
|
}
|
|
|
|
private async _getStep(cursor: ActionCursor) {
|
|
if (cursor.actionIdx === null) { throw new Error('No step available'); }
|
|
const steps = await this._getSteps();
|
|
return steps[cursor.actionIdx];
|
|
}
|
|
|
|
private async _getMetaStep(cursor: ActionCursor) {
|
|
if (cursor.actionIdx === null) { throw new Error('No step available'); }
|
|
const steps = await this._getMetaSteps();
|
|
return steps[cursor.actionIdx];
|
|
}
|
|
|
|
// Get an AccessCheck appropriate for the specific action.
|
|
// TODO: deal with ReplaceTableData, which both deletes and creates rows.
|
|
private async _getAccessForActionType(docSession: OptDocSession, a: DocAction,
|
|
severity: 'check'|'fatal'): Promise<IAccessCheck> {
|
|
if (this._hasExceptionalFullAccess(docSession)) {
|
|
return dummyAccessCheck;
|
|
}
|
|
const tableId = getTableId(a);
|
|
if (tableId.startsWith('_grist') && tableId !== '_grist_Attachments') {
|
|
// Actions on any metadata table currently require the schemaEdit flag.
|
|
// Exception: the attachments table, which needs to be reworked to be compatible
|
|
// with granular access.
|
|
|
|
// Another exception: ensure owners always have full access to ACL tables, so they
|
|
// can change rules and don't get stuck.
|
|
if (isAclTable(tableId) && await this.isOwner(docSession)) {
|
|
return dummyAccessCheck;
|
|
}
|
|
return accessChecks[severity].schemaEdit;
|
|
} else if (a[0] === 'UpdateRecord' || a[0] === 'BulkUpdateRecord') {
|
|
return accessChecks[severity].update;
|
|
} else if (a[0] === 'RemoveRecord' || a[0] === 'BulkRemoveRecord') {
|
|
return accessChecks[severity].delete;
|
|
} else if (a[0] === 'AddRecord' || a[0] === 'BulkAddRecord') {
|
|
return accessChecks[severity].create;
|
|
} else {
|
|
return accessChecks[severity].schemaEdit;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A snapshots of rules and permissions at during one of more steps within a bundle.
|
|
*/
|
|
export class Ruler {
|
|
// The collection of all rules, with helpful accessors.
|
|
public ruleCollection = new ACLRuleCollection();
|
|
|
|
// Cache of PermissionInfo associated with the given docSession. It's a WeakMap, so should allow
|
|
// both to be garbage-collected once docSession is no longer in use.
|
|
private _permissionInfoMap = new WeakMap<OptDocSession, Promise<PermissionInfo>>();
|
|
|
|
public constructor(private _owner: RulerOwner) {}
|
|
|
|
public async getAccess(docSession: OptDocSession): Promise<PermissionInfo> {
|
|
// TODO The intent of caching is to avoid duplicating rule evaluations while processing a
|
|
// single request. Caching based on docSession is riskier since those persist across requests.
|
|
return getSetMapValue(this._permissionInfoMap as Map<OptDocSession, Promise<PermissionInfo>>, docSession,
|
|
async () => new PermissionInfo(this.ruleCollection, {user: await this._owner.getUser(docSession)}));
|
|
}
|
|
|
|
public flushAccess(docSession: OptDocSession) {
|
|
this._permissionInfoMap.delete(docSession);
|
|
}
|
|
|
|
/**
|
|
* Update granular access from DocData.
|
|
*/
|
|
public async update(docData: DocData) {
|
|
await this.ruleCollection.update(docData, {log, compile: compileAclFormula});
|
|
|
|
// Also clear the per-docSession cache of rule evaluations.
|
|
this.clearCache();
|
|
}
|
|
|
|
public clearCache() {
|
|
this._permissionInfoMap = new WeakMap();
|
|
}
|
|
|
|
public haveRules() {
|
|
return this.ruleCollection.haveRules();
|
|
}
|
|
}
|
|
|
|
export interface RulerOwner {
|
|
getUser(docSession: OptDocSession): Promise<UserInfo>;
|
|
}
|
|
|
|
/**
|
|
* Information about a single step within a bundle. We cache this information to share
|
|
* when filtering output to several clients.
|
|
*/
|
|
export interface ActionStep {
|
|
action: DocAction;
|
|
rowsBefore: TableDataAction|undefined; // only defined for actions modifying rows
|
|
rowsAfter: TableDataAction|undefined; // only defined for actions modifying rows
|
|
rowsLast?: TableDataAction; // cached calculation of where to point "newRec"
|
|
}
|
|
export interface MetaStep {
|
|
action: DocAction;
|
|
metaBefore?: {[key: string]: TableDataAction}; // cached structural metadata before action
|
|
metaAfter?: {[key: string]: TableDataAction}; // cached structural metadata after action
|
|
ruler?: Ruler; // rules at this step
|
|
}
|
|
|
|
/**
|
|
* A pointer to a particular step within a bundle for a particular session.
|
|
*/
|
|
interface ActionCursor {
|
|
action: DocAction;
|
|
docSession: OptDocSession;
|
|
actionIdx: number|null;
|
|
}
|
|
|
|
/**
|
|
* A row-like view of TableDataAction, which is columnar in nature. If index value
|
|
* is undefined, acts as an EmptyRecordRow.
|
|
*/
|
|
export class RecordView implements InfoView {
|
|
public constructor(public data: TableDataAction, public index: number|undefined) {
|
|
}
|
|
|
|
public get(colId: string): CellValue {
|
|
if (this.index === undefined) { return null; }
|
|
if (colId === 'id') {
|
|
return this.data[2][this.index];
|
|
}
|
|
return this.data[3][colId]?.[this.index];
|
|
}
|
|
|
|
public has(colId: string) {
|
|
return colId === 'id' || colId in this.data[3];
|
|
}
|
|
|
|
public toJSON() {
|
|
if (this.index === undefined) { return {}; }
|
|
const results: {[key: string]: any} = {};
|
|
for (const key of Object.keys(this.data[3])) {
|
|
results[key] = this.data[3][key]?.[this.index];
|
|
}
|
|
return results;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A read-write view of a DataAction, for use in censorship.
|
|
*/
|
|
class RecordEditor implements InfoEditor {
|
|
private _rows: number[];
|
|
private _bulk: boolean;
|
|
private _data: ColValues | BulkColValues;
|
|
public constructor(public data: DataAction, public index: number|undefined,
|
|
public optional: boolean) {
|
|
const rows = data[2];
|
|
this._bulk = Array.isArray(rows);
|
|
this._rows = Array.isArray(rows) ? rows : [rows];
|
|
this._data = data[3] || {};
|
|
}
|
|
|
|
public get(colId: string): CellValue {
|
|
if (this.index === undefined) { return null; }
|
|
if (colId === 'id') {
|
|
return this._rows[this.index];
|
|
}
|
|
return this._bulk ?
|
|
(this._data as BulkColValues)[colId][this.index] :
|
|
(this._data as ColValues)[colId];
|
|
}
|
|
|
|
public set(colId: string, val: CellValue): this {
|
|
if (this.index === undefined) { throw new Error('cannot set value of non-existent cell'); }
|
|
if (colId === 'id') { throw new Error('cannot change id'); }
|
|
if (this.optional && !(colId in this._data)) { return this; }
|
|
if (this._bulk) {
|
|
(this._data as BulkColValues)[colId][this.index] = val;
|
|
} else {
|
|
(this._data as ColValues)[colId] = val;
|
|
}
|
|
return this;
|
|
}
|
|
|
|
public toJSON() {
|
|
if (this.index === undefined) { return {}; }
|
|
const results: {[key: string]: any} = {};
|
|
for (const key of Object.keys(this._data)) {
|
|
results[key] = this.get(key);
|
|
}
|
|
return results;
|
|
}
|
|
}
|
|
|
|
class EmptyRecordView implements InfoView {
|
|
public get(colId: string): CellValue { return null; }
|
|
public toJSON() { return {}; }
|
|
}
|
|
|
|
/**
|
|
* Cache information about user attributes.
|
|
*/
|
|
class UserAttributes {
|
|
public rows: {[clauseName: string]: InfoView} = {};
|
|
public override?: UserOverride;
|
|
}
|
|
|
|
interface IAccessCheck {
|
|
get(ps: PermissionSetWithContext): string;
|
|
throwIfDenied(ps: PermissionSetWithContext): void;
|
|
throwIfNotFullyAllowed(ps: PermissionSetWithContext): void;
|
|
}
|
|
|
|
class AccessCheck implements IAccessCheck {
|
|
constructor(public access: 'update'|'delete'|'create'|'schemaEdit'|'read',
|
|
public severity: 'check'|'fatal') {
|
|
}
|
|
|
|
public get(ps: PermissionSetWithContext): string {
|
|
const result = ps.perms[this.access];
|
|
if (result !== 'deny' || this.severity !== 'fatal') { return result; }
|
|
this.throwIfDenied(ps);
|
|
return result;
|
|
}
|
|
|
|
public throwIfDenied(ps: PermissionSetWithContext): void {
|
|
const result = ps.perms[this.access];
|
|
if (result !== 'deny') { return; }
|
|
this._throwError(ps);
|
|
}
|
|
|
|
public throwIfNotFullyAllowed(ps: PermissionSetWithContext): void {
|
|
const result = ps.perms[this.access];
|
|
if (result === 'allow') { return; }
|
|
this._throwError(ps);
|
|
}
|
|
|
|
private _throwError(ps: PermissionSetWithContext): void {
|
|
const memos = ps.getMemos()[this.access];
|
|
const label =
|
|
this.access === 'schemaEdit' ? 'structure' :
|
|
this.access;
|
|
throw new ErrorWithCode('ACL_DENY', `Blocked by ${ps.ruleType} ${label} access rules`, {
|
|
memos,
|
|
status: 403
|
|
});
|
|
}
|
|
}
|
|
|
|
export const accessChecks = {
|
|
check: fromPairs(ALL_PERMISSION_PROPS.map(prop => [prop, new AccessCheck(prop, 'check')])),
|
|
fatal: fromPairs(ALL_PERMISSION_PROPS.map(prop => [prop, new AccessCheck(prop, 'fatal')])),
|
|
};
|
|
|
|
|
|
// This AccessCheck allows everything.
|
|
const dummyAccessCheck: IAccessCheck = {
|
|
get() { return 'allow'; },
|
|
throwIfDenied() {},
|
|
throwIfNotFullyAllowed() {}
|
|
};
|
|
|
|
|
|
/**
|
|
* Manage censoring metadata.
|
|
*/
|
|
export class CensorshipInfo {
|
|
public censoredTables = new Set<number>();
|
|
public censoredSections = new Set<number>();
|
|
public censoredViews = new Set<number>();
|
|
public censoredColumns = new Set<number>();
|
|
public censoredFields = new Set<number>();
|
|
public censored = {
|
|
_grist_Tables: this.censoredTables,
|
|
_grist_Tables_column: this.censoredColumns,
|
|
_grist_Views: this.censoredViews,
|
|
_grist_Views_section: this.censoredSections,
|
|
_grist_Views_section_field: this.censoredFields,
|
|
};
|
|
|
|
public constructor(permInfo: PermissionInfo,
|
|
ruleCollection: ACLRuleCollection,
|
|
tables: {[key: string]: TableDataAction},
|
|
private _canViewACLs: boolean) {
|
|
// Collect a list of censored columns (by "<tableRef> <colId>").
|
|
const columnCode = (tableRef: number, colId: string) => `${tableRef} ${colId}`;
|
|
const censoredColumnCodes: Set<string> = new Set();
|
|
const tableRefToTableId: Map<number, string> = new Map();
|
|
const uncensoredTables: Set<number> = new Set();
|
|
// Scan for forbidden tables.
|
|
let rec = new RecordView(tables._grist_Tables, undefined);
|
|
let ids = getRowIdsFromDocAction(tables._grist_Tables);
|
|
for (let idx = 0; idx < ids.length; idx++) {
|
|
rec.index = idx;
|
|
const tableId = rec.get('tableId') as string;
|
|
const tableRef = ids[idx];
|
|
tableRefToTableId.set(tableRef, tableId);
|
|
const tableAccess = permInfo.getTableAccess(tableId);
|
|
if (tableAccess.perms.read === 'deny') {
|
|
this.censoredTables.add(tableRef);
|
|
} else if (tableAccess.perms.read === 'allow') {
|
|
uncensoredTables.add(tableRef);
|
|
}
|
|
}
|
|
// Scan for forbidden columns.
|
|
ids = getRowIdsFromDocAction(tables._grist_Tables_column);
|
|
rec = new RecordView(tables._grist_Tables_column, undefined);
|
|
for (let idx = 0; idx < ids.length; idx++) {
|
|
rec.index = idx;
|
|
const tableRef = rec.get('parentId') as number;
|
|
if (uncensoredTables.has(tableRef)) { continue; }
|
|
const tableId = tableRefToTableId.get(tableRef);
|
|
if (!tableId) { throw new Error('table not found'); }
|
|
const colId = rec.get('colId') as string;
|
|
if (this.censoredTables.has(tableRef) ||
|
|
(colId !== 'manualSort' && permInfo.getColumnAccess(tableId, colId).perms.read === 'deny')) {
|
|
censoredColumnCodes.add(columnCode(tableRef, colId));
|
|
}
|
|
}
|
|
// Collect a list of all sections and views containing a table to which the user has no access.
|
|
rec = new RecordView(tables._grist_Views_section, undefined);
|
|
ids = getRowIdsFromDocAction(tables._grist_Views_section);
|
|
for (let idx = 0; idx < ids.length; idx++) {
|
|
rec.index = idx;
|
|
if (!this.censoredTables.has(rec.get('tableRef') as number)) { continue; }
|
|
const parentId = rec.get('parentId') as number;
|
|
if (parentId) { this.censoredViews.add(parentId); }
|
|
this.censoredSections.add(ids[idx]);
|
|
}
|
|
// Collect a list of all columns from tables to which the user has no access.
|
|
rec = new RecordView(tables._grist_Tables_column, undefined);
|
|
ids = getRowIdsFromDocAction(tables._grist_Tables_column);
|
|
for (let idx = 0; idx < ids.length; idx++) {
|
|
rec.index = idx;
|
|
const parentId = rec.get('parentId') as number;
|
|
if (this.censoredTables.has(parentId) ||
|
|
censoredColumnCodes.has(columnCode(parentId, rec.get('colId') as string))) {
|
|
this.censoredColumns.add(ids[idx]);
|
|
}
|
|
}
|
|
// Collect a list of all fields from sections to which the user has no access.
|
|
rec = new RecordView(tables._grist_Views_section_field, undefined);
|
|
ids = getRowIdsFromDocAction(tables._grist_Views_section_field);
|
|
for (let idx = 0; idx < ids.length; idx++) {
|
|
rec.index = idx;
|
|
if (!this.censoredSections.has(rec.get('parentId') as number) &&
|
|
!this.censoredColumns.has(rec.get('colRef') as number)) { continue; }
|
|
this.censoredFields.add(ids[idx]);
|
|
}
|
|
}
|
|
|
|
public apply(a: DataAction) {
|
|
const tableId = getTableId(a);
|
|
const ids = getRowIdsFromDocAction(a);
|
|
if (!STRUCTURAL_TABLES.has(tableId)) { return true; }
|
|
if (!(tableId in this.censored)) {
|
|
if (!this._canViewACLs && a[0] === 'TableData') {
|
|
a[2] = [];
|
|
a[3] = {};
|
|
}
|
|
return this._canViewACLs;
|
|
}
|
|
const rec = new RecordEditor(a, undefined, true);
|
|
const method = getCensorMethod(getTableId(a));
|
|
const censoredRows = (this.censored as any)[tableId] as Set<number>;
|
|
for (const [index, id] of ids.entries()) {
|
|
if (censoredRows.has(id)) {
|
|
rec.index = index;
|
|
method(rec);
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
}
|
|
|
|
function getCensorMethod(tableId: string): (rec: RecordEditor) => void {
|
|
switch (tableId) {
|
|
case '_grist_Tables':
|
|
return rec => rec.set('tableId', '');
|
|
case '_grist_Views':
|
|
return rec => rec.set('name', '');
|
|
case '_grist_Views_section':
|
|
return rec => rec.set('title', '').set('tableRef', 0);
|
|
case '_grist_Tables_column':
|
|
return rec => rec.set('label', '').set('colId', '').set('widgetOptions', '')
|
|
.set('formula', '').set('type', 'Any').set('parentId', 0);
|
|
case '_grist_Views_section_field':
|
|
return rec => rec.set('widgetOptions', '').set('filter', '').set('parentId', 0);
|
|
case '_grist_ACLResources':
|
|
return rec => rec;
|
|
case '_grist_ACLRules':
|
|
return rec => rec;
|
|
default:
|
|
throw new Error(`cannot censor ${tableId}`);
|
|
}
|
|
}
|
|
|
|
function scanActionsRecursively(actions: (DocAction|UserAction)[],
|
|
check: (action: DocAction|UserAction) => boolean): boolean {
|
|
for (const a of actions) {
|
|
if (a[0] === 'ApplyUndoActions' || a[0] === 'ApplyDocActions') {
|
|
return scanActionsRecursively(a[1] as UserAction[], check);
|
|
}
|
|
if (check(a)) { return true; }
|
|
}
|
|
return false;
|
|
}
|
|
|
|
async function applyToActionsRecursively(actions: (DocAction|UserAction)[],
|
|
op: (action: DocAction|UserAction) => Promise<void>): Promise<void> {
|
|
for (const a of actions) {
|
|
if (a[0] === 'ApplyUndoActions' || a[0] === 'ApplyDocActions') {
|
|
await applyToActionsRecursively(a[1] as UserAction[], op);
|
|
}
|
|
await op(a);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Takes an action, and removes certain cells from it. The action
|
|
* passed in is modified in place, and also returned as part of a list
|
|
* of derived actions.
|
|
*
|
|
* For a non-bulk action, any cell values that return true for
|
|
* shouldFilterCell are removed. For a bulk action, there's no way to
|
|
* express that in general in a single action. For a bulk action, for
|
|
* any row (identified by row index, not rowId) that returns true for
|
|
* shouldFilterRow, we remove cell values based on shouldFilterCell
|
|
* and add the row to an action with just the remaining cell values.
|
|
*
|
|
* This is by no means a general-purpose function. It is used only in
|
|
* the implementation of partial undos. If is factored out for
|
|
* testing purposes.
|
|
*
|
|
* This method could be made unnecessary if a way were created to have
|
|
* unambiguous "holes" in column value arrays, where values for some
|
|
* rows are omitted.
|
|
*/
|
|
export function filterColValues(action: DataAction,
|
|
shouldFilterRow: (idx: number) => boolean,
|
|
shouldFilterCell: (value: CellValue) => boolean): DataAction[] {
|
|
if (isRemoveRecordAction(action)) {
|
|
// removals do not have cells, so nothing to do.
|
|
return [action];
|
|
}
|
|
|
|
const colIds = Object.keys(action[3]).sort();
|
|
const colValues = action[3];
|
|
|
|
if (!isBulkAction(action)) {
|
|
for (const colId of colIds) {
|
|
if (shouldFilterCell((colValues as ColValues)[colId])) {
|
|
delete colValues[colId];
|
|
}
|
|
}
|
|
return [action];
|
|
}
|
|
|
|
const rowIds = action[2];
|
|
|
|
// For bulk operations, censored cells require us to reorganize into a set of actions
|
|
// with different columns.
|
|
const parts: Map<string, typeof action> = new Map();
|
|
let at = 0;
|
|
for (let idx = 0; idx < rowIds.length; idx++) {
|
|
if (!shouldFilterRow(idx)) {
|
|
if (idx !== at) {
|
|
// Shuffle columnar data up as we remove rows.
|
|
rowIds[at] = rowIds[idx];
|
|
for (const colId of colIds) {
|
|
(colValues as BulkColValues)[colId][at] = (colValues as BulkColValues)[colId][idx];
|
|
}
|
|
}
|
|
at++;
|
|
continue;
|
|
}
|
|
// Some censored data in this row, so move the row to an action specialized
|
|
// for the set of columns this row has.
|
|
const keys: string[] = [];
|
|
const values: BulkColValues = {};
|
|
for (const colId of colIds) {
|
|
const value = (colValues as BulkColValues)[colId][idx];
|
|
if (!shouldFilterCell(value)) {
|
|
values[colId] = [value];
|
|
keys.push(colId);
|
|
}
|
|
}
|
|
const mergedKey = keys.join(' ');
|
|
const peers = parts.get(mergedKey);
|
|
if (!peers) {
|
|
parts.set(mergedKey, [action[0], action[1], [rowIds[idx]], values]);
|
|
} else {
|
|
peers[2].push(rowIds[idx]);
|
|
for (const key of keys) {
|
|
peers[3][key].push(values[key][0]);
|
|
}
|
|
}
|
|
}
|
|
// Truncate columnar data.
|
|
rowIds.length = at;
|
|
for (const colId of colIds) {
|
|
(colValues as BulkColValues)[colId].length = at;
|
|
}
|
|
// Return all actions, in a consistent order for test purposes.
|
|
return [action, ...[...parts.keys()].sort().map(key => parts.get(key)!)];
|
|
}
|
|
|
|
/**
|
|
* Information about a user, including any user attributes.
|
|
*
|
|
* Serializes into a more compact JSON form that excludes full
|
|
* row data, only keeping user info and table/row ids for any
|
|
* user attributes.
|
|
*
|
|
* See `user.py` for the sandbox equivalent that deserializes objects of this class.
|
|
*/
|
|
export class User implements UserInfo {
|
|
public Name: string | null = null;
|
|
public UserID: number | null = null;
|
|
public Access: Role | null = null;
|
|
public Origin: string | null = null;
|
|
public LinkKey: Record<string, string | undefined> = {};
|
|
public Email: string | null = null;
|
|
[attribute: string]: any;
|
|
|
|
constructor(_info: Record<string, unknown> = {}) {
|
|
Object.assign(this, _info);
|
|
}
|
|
|
|
public toJSON() {
|
|
const results: {[key: string]: any} = {};
|
|
for (const [key, value] of Object.entries(this)) {
|
|
if (value instanceof RecordView) {
|
|
// Only include the table id and first matching row id.
|
|
results[key] = [getTableId(value.data), value.get('id')];
|
|
} else if (value instanceof EmptyRecordView) {
|
|
results[key] = null;
|
|
} else {
|
|
results[key] = value;
|
|
}
|
|
}
|
|
return results;
|
|
}
|
|
}
|
|
|
|
export function validTableIdString(tableId: any): string {
|
|
if (typeof tableId !== 'string') { throw new Error(`Expected tableId to be a string`); }
|
|
return tableId;
|
|
}
|