mirror of
https://github.com/gristlabs/grist-core.git
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d0d3d3d0c9
Summary: This diff discounts indirect changes for access control purposes. A UserAction that updates a cell A, which in turn causes changes in other dependent cells, will be considered a change to cell A for access control purposes. The `engine.apply_user_actions` method now returns a `direct` array, with a boolean for each `stored` action, set to `true` if the action is attributed to the user or `false` if it is attributed to the engine. `GranularAccess` ignores actions attributed to the engine when checking for edit rights. Subtleties: * Removal of references to a removed row are considered direct changes. * Doesn't play well with undos as yet. An action that indirectly modifies a cell the user doesn't have rights to may succeed, but it will not be reversible. Test Plan: added tests, updated tests Reviewers: dsagal Reviewed By: dsagal Differential Revision: https://phab.getgrist.com/D2806
1750 lines
73 KiB
TypeScript
1750 lines
73 KiB
TypeScript
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 { Query } from 'app/common/ActiveDocAPI';
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import { ApiError } from 'app/common/ApiError';
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import { AddRecord, BulkAddRecord, BulkColValues, BulkRemoveRecord, BulkUpdateRecord } 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 { 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 { getSetMapValue, isObject, pruneArray } from 'app/common/gutil';
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import { canView, Role } from 'app/common/roles';
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import { FullUser } from 'app/common/UserAPI';
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import { HomeDBManager } from 'app/gen-server/lib/HomeDBManager';
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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, getDocSessionUser, OptDocSession } from 'app/server/lib/DocSession';
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import * as 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.
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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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// 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.
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const SPECIAL_ACTIONS = new Set(['InitNewDoc',
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'EvalCode',
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'SetDisplayFormula',
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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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'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']);
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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): 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: Query) => 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._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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/**
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* Check whether user can carry out query.
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*/
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public hasQueryAccess(docSession: OptDocSession, query: Query) {
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return this.hasTableAccess(docSession, query.tableId);
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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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/**
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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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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.getTable('_grist_Tables')!.getTableDataAction(),
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_grist_Tables_column: this._docData.getTable('_grist_Tables_column')!.getTableDataAction(),
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_grist_ACLResources: this._docData.getTable('_grist_ACLResources')!.getTableDataAction(),
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_grist_ACLRules: this._docData.getTable('_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(docSession: OptDocSession, actionGroup: ActionGroup): Promise<ActionGroup> {
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if (await this.allowActionGroup(docSession, actionGroup)) { return actionGroup; }
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// For now, if there's any nuance at all, suppress the summary and description.
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// TODO: create an empty action summary, to be sure not to leak anything important.
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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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* Check whether an ActionGroup can be sent to the client. TODO: in future, we'll want
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* to filter acceptible parts of ActionGroup, rather than denying entirely.
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*/
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public async allowActionGroup(docSession: OptDocSession, actionGroup: ActionGroup): Promise<boolean> {
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return this.canReadEverything(docSession);
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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 apply an
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* action, or false if 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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for (const action of actions) {
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if (!await this.assertCanMaybeApplyUserAction(docSession, action)) { return false; }
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}
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return true;
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}
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/**
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* Check if user may be able to apply a given action. Throws if
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* user cannot apply the action. Returns true if a user can apply an
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* action, or false if 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 assertCanMaybeApplyUserAction(docSession: OptDocSession, a: UserAction|DocAction): Promise<boolean> {
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const name = a[0] as string;
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if (OK_ACTIONS.has(name)) { return true; }
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if (SPECIAL_ACTIONS.has(name)) {
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if (await this.hasNuancedAccess(docSession)) {
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throw new ErrorWithCode('ACL_DENY', `Blocked by access rules: '${name}' actions need uncomplicated access`);
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}
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return true;
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}
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if (SURPRISING_ACTIONS.has(name)) {
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if (!await this.hasFullAccess(docSession)) {
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throw new ErrorWithCode('ACL_DENY', `Blocked by access rules: '${name}' actions need full access`);
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}
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return true;
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}
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if (a[0] === 'ApplyUndoActions') {
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return this.assertCanMaybeApplyUserActions(docSession, a[1] as UserAction[]);
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} else if (a[0] === 'ApplyDocActions') {
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return this.assertCanMaybeApplyUserActions(docSession, a[1] as UserAction[]);
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} else if (isDataAction(a)) {
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const tableId = getTableId(a);
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if (tableId.startsWith('_grist_')) {
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return false; // have to look closely
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}
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const tableAccess = await this.getTableAccess(docSession, tableId);
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const accessCheck = await this._getAccessForActionType(docSession, a, 'fatal');
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accessCheck.get(tableAccess); // will throw if access denied.
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return true;
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} else {
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return false; // have to look closely
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}
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}
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/**
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* Check whether access is simple, or there are granular nuances that need to be
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* worked through. Currently if there are no owner-only tables, then everyone's
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* access is simple and without nuance.
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*/
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public async hasNuancedAccess(docSession: OptDocSession): Promise<boolean> {
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if (!this._ruler.haveRules()) { return false; }
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return !await this.hasFullAccess(docSession);
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}
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/**
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* Check if user is explicitly permitted to download/copy document.
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* They may be allowed to download in any case, see canCopyEverything.
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*/
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public async hasFullCopiesPermission(docSession: OptDocSession): Promise<boolean> {
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const permInfo = await this._getAccess(docSession);
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return permInfo.getColumnAccess(SPECIAL_RULES_TABLE_ID, 'FullCopies').perms.read === 'allow';
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}
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/**
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* Check if user may view Access Rules.
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*/
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public async hasAccessRulesPermission(docSession: OptDocSession): Promise<boolean> {
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const permInfo = await this._getAccess(docSession);
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return permInfo.getColumnAccess(SPECIAL_RULES_TABLE_ID, 'AccessRules').perms.read === 'allow';
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}
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|
|
|
/**
|
|
* Check whether user can read everything in document. Checks both home-level and doc-level
|
|
* permissions.
|
|
*/
|
|
public async canReadEverything(docSession: OptDocSession): Promise<boolean> {
|
|
const access = 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 = JSON.parse(JSON.stringify(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> {
|
|
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') {
|
|
await this._filterRowsAndCells(cursor, data, data, readAccessCheck);
|
|
}
|
|
|
|
// 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) {
|
|
readAccessCheck.throwIfDenied(ps);
|
|
}
|
|
|
|
/**
|
|
* Broadcast document changes to all clients, with appropriate filtering.
|
|
*/
|
|
public async sendDocUpdateForBundle(actionGroup: ActionGroup) {
|
|
if (!this._activeBundle) { throw new Error('no active bundle'); }
|
|
const { docActions, docSession } = this._activeBundle;
|
|
const client = docSession && docSession.client || null;
|
|
const message = { actionGroup, docActions };
|
|
await this._docClients.broadcastDocMessage(client, 'docUserAction',
|
|
message,
|
|
(docSession) => this._filterDocUpdate(docSession, message));
|
|
}
|
|
|
|
/**
|
|
* Get the role the session user has for this document. User may be overridden,
|
|
* in which case the role of the override is returned.
|
|
*/
|
|
private async _getNominalAccess(docSession: OptDocSession): Promise<Role> {
|
|
const linkParameters = docSession.authorizer?.getLinkParameters() || {};
|
|
if (linkParameters.aclAsUserId || linkParameters.aclAsUser) {
|
|
const info = await this._getUser(docSession);
|
|
return info.Access as Role;
|
|
}
|
|
return getDocSessionAccess(docSession);
|
|
}
|
|
|
|
/**
|
|
* 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: {
|
|
actionGroup: ActionGroup,
|
|
docActions: DocAction[]
|
|
}) {
|
|
if (!this._activeBundle) { throw new Error('no active bundle'); }
|
|
if (!this._ruler.haveRules() && !this._activeBundle.hasDeliberateRuleChange) {
|
|
return message;
|
|
}
|
|
const result = {
|
|
actionGroup: await this.filterActionGroup(docSession, message.actionGroup),
|
|
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(isObject);
|
|
|
|
// 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.
|
|
for (const action of revisedDocActions) {
|
|
await this._filterRowsAndCells({...cursor, action}, rowsAfter, rowsAfter, readAccessCheck);
|
|
}
|
|
return revisedDocActions;
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
await this._filterRowsAndCells(cursor, rowsBefore, rowsAfter, accessCheck);
|
|
}
|
|
|
|
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};
|
|
}
|
|
|
|
/**
|
|
* Modify action in place, scrubbing any rows and cells to which access is not granted.
|
|
*/
|
|
private async _filterRowsAndCells(cursor: ActionCursor, rowsBefore: TableDataAction, rowsAfter: TableDataAction,
|
|
accessCheck: IAccessCheck) {
|
|
const ruler = await this._getRuler(cursor);
|
|
const {docSession, action} = cursor;
|
|
if (action && isSchemaAction(action)) {
|
|
return [];
|
|
}
|
|
|
|
const rec = new RecordView(rowsBefore, undefined);
|
|
const newRec = new RecordView(rowsAfter, undefined);
|
|
const input: AclMatchInput = {user: await this._getUser(docSession), rec, newRec};
|
|
|
|
const [, tableId, , colValues] = action;
|
|
const rowIds = getRowIdsFromDocAction(action);
|
|
const toRemove: number[] = [];
|
|
|
|
let censorAt: (colId: string, idx: number) => void;
|
|
if (colValues === undefined) {
|
|
censorAt = () => 1;
|
|
} else if (Array.isArray(action[2])) {
|
|
censorAt = (colId, idx) => (colValues as BulkColValues)[colId][idx] = 'CENSORED'; // TODO Pick a suitable value
|
|
} else {
|
|
censorAt = (colId) => (colValues as ColValues)[colId] = 'CENSORED'; // TODO Pick a suitable value
|
|
}
|
|
|
|
// 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 !== rowsBefore) {
|
|
const recIndexes = new Map(rowsBefore[2].map((rowId, idx) => [rowId, idx]));
|
|
getRecIndex = (idx) => recIndexes.get(rowIds[idx]);
|
|
const newRecIndexes = new Map(rowsAfter[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);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (toRemove.length > 0) {
|
|
if (rowsBefore === action) {
|
|
this._removeRowsAt(toRemove, rowsBefore[2], rowsBefore[3]);
|
|
} else {
|
|
// Artificially introduced removals are ok, otherwise this is suspect.
|
|
if (action[0] !== 'RemoveRecord' && action[0] !== 'BulkRemoveRecord') {
|
|
throw new Error('Unexpected row removal');
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// 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|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 aclAsUserId/aclAsUser is set, then override user for acl purposes.
|
|
if (linkParameters.aclAsUserId || linkParameters.aclAsUser) {
|
|
if (access !== 'owners') { throw new Error('only an owner can override user'); }
|
|
if (attrs.override) {
|
|
// Used cached properties.
|
|
access = attrs.override.access;
|
|
fullUser = attrs.override.user;
|
|
} else {
|
|
// 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))) :
|
|
(await this._homeDbManager.getUserByLogin(linkParameters.aclAsUser));
|
|
const docAuth = dbUser && await this._homeDbManager.getDocAuthCached({
|
|
urlId: this._docId,
|
|
userId: dbUser.id
|
|
});
|
|
access = docAuth?.access || null;
|
|
fullUser = dbUser && this._homeDbManager.makeFullUser(dbUser) || null;
|
|
attrs.override = { access, user: fullUser };
|
|
}
|
|
} else {
|
|
fullUser = getDocSessionUser(docSession);
|
|
}
|
|
const user: UserInfo = {};
|
|
user.Access = access;
|
|
user.UserID = 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;
|
|
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
|
|
/**
|
|
* 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 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 (docSession.mode === 'system' || docSession.mode === 'nascent') {
|
|
return dummyAccessCheck;
|
|
}
|
|
const tableId = getTableId(a);
|
|
if (STRUCTURAL_TABLES.has(tableId)) {
|
|
// Special case: 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;
|
|
}
|
|
// Otherwise, access to structural tables currently follows the schemaEdit flag.
|
|
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)}));
|
|
}
|
|
|
|
/**
|
|
* 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 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;
|
|
}
|
|
|
|
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; }
|
|
const memos = ps.getMemos()[this.access];
|
|
throw new ErrorWithCode('ACL_DENY', `Blocked by ${ps.ruleType} access rules`, {
|
|
memos,
|
|
status: 403
|
|
});
|
|
}
|
|
}
|
|
|
|
export const accessChecks = {
|
|
check: fromPairs(ALL_PERMISSION_PROPS.map(prop => [prop, new AccessCheck(prop, 'check')])),
|
|
fatal: fromPairs(ALL_PERMISSION_PROPS.map(prop => [prop, new AccessCheck(prop, 'fatal')])),
|
|
};
|
|
|
|
|
|
// The AccessCheck for the "read" permission is used enough to merit a shortcut.
|
|
const readAccessCheck = accessChecks.check.read;
|
|
|
|
// This AccessCheck allows everything.
|
|
const dummyAccessCheck = { get() { return 'allow'; } }
|
|
|
|
|
|
/**
|
|
* Manage censoring metadata.
|
|
*/
|
|
export class CensorshipInfo {
|
|
public censoredTables = new Set<number>();
|
|
public censoredSections = new Set<number>();
|
|
public censoredViews = new Set<number>();
|
|
public censoredColumns = new Set<number>();
|
|
public censoredFields = new Set<number>();
|
|
public censored = {
|
|
_grist_Tables: this.censoredTables,
|
|
_grist_Tables_column: this.censoredColumns,
|
|
_grist_Views: this.censoredViews,
|
|
_grist_Views_section: this.censoredSections,
|
|
_grist_Views_section_field: this.censoredFields,
|
|
};
|
|
|
|
public constructor(permInfo: PermissionInfo,
|
|
ruleCollection: ACLRuleCollection,
|
|
tables: {[key: string]: TableDataAction},
|
|
private _canViewACLs: boolean) {
|
|
// Collect a list of censored columns (by "<tableRef> <colId>").
|
|
const columnCode = (tableRef: number, colId: string) => `${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') {
|
|
return scanActionsRecursively(a[1] as UserAction[], check);
|
|
} else if (a[0] === 'ApplyDocActions') {
|
|
return scanActionsRecursively(a[1] as UserAction[], check);
|
|
}
|
|
if (check(a)) { return true; }
|
|
}
|
|
return false;
|
|
}
|