gristlabs_grist-core/app/plugin/TableOperationsImpl.ts
2022-10-26 10:41:38 -04:00

217 lines
9.2 KiB
TypeScript

import * as Types from "./DocApiTypes";
import { BulkColValues } from './GristData';
import { OpOptions, TableOperations, UpsertOptions } from './TableOperations';
import { arrayRepeat } from './gutil';
import flatMap = require('lodash/flatMap');
import isEqual = require('lodash/isEqual');
import pick = require('lodash/pick');
import groupBy = require('lodash/groupBy');
/**
* An implementation of the TableOperations interface, given a platform
* capable of applying user actions. Used by REST API server, and by the
* Grist plugin API that is embedded in custom widgets.
*/
export class TableOperationsImpl implements TableOperations {
public constructor(private _platform: TableOperationsPlatform,
private _defaultOptions: OpOptions) {
}
public getTableId() {
return this._platform.getTableId();
}
public create(records: Types.NewRecord, options?: OpOptions): Promise<Types.MinimalRecord>;
public create(records: Types.NewRecord[], options?: OpOptions): Promise<Types.MinimalRecord[]>;
public async create(recordsOrRecord: Types.NewRecord[]|Types.NewRecord,
options?: OpOptions): Promise<Types.MinimalRecord[]|Types.MinimalRecord> {
return await withRecords(recordsOrRecord, async (records) => {
const postRecords = convertToBulkColValues(records);
// postRecords can be an empty object, in that case we will create empty records.
const ids = await this.addRecords(records.length, postRecords, options);
return ids.map(id => ({id}));
});
}
public async update(recordOrRecords: Types.Record|Types.Record[], options?: OpOptions) {
await withRecords(recordOrRecords, async (records) => {
if (!areSameFields(records)) {
this._platform.throwError('PATCH', 'requires all records to have same fields', 400);
}
const rowIds = records.map(r => r.id);
const columnValues = convertToBulkColValues(records);
if (!rowIds.length || !columnValues) {
// For patch method, we require at least one valid record.
this._platform.throwError('PATCH', 'requires a valid record object', 400);
}
await this.updateRecords(columnValues, rowIds, options);
return [];
});
}
public async upsert(recordOrRecords: Types.AddOrUpdateRecord|Types.AddOrUpdateRecord[],
upsertOptions?: UpsertOptions): Promise<void> {
await withRecords(recordOrRecords, async (records) => {
const tableId = await this._platform.getTableId();
const options = {
add: upsertOptions?.add,
update: upsertOptions?.update,
on_many: upsertOptions?.onMany,
allow_empty_require: upsertOptions?.allowEmptyRequire
};
const recordOptions: OpOptions = pick(upsertOptions, 'parseStrings');
// Group records based on having the same keys in `require` and `fields`.
// A single bulk action will be applied to each group.
// We don't want one bulk action for all records that might have different shapes,
// because that would require filling arrays with null values.
const recGroups = groupBy(records, rec => {
const requireKeys = Object.keys(rec.require).sort().join(',');
const fieldsKeys = Object.keys(rec.fields || {}).sort().join(',');
return `${requireKeys}:${fieldsKeys}`;
});
const actions = Object.values(recGroups).map(group => {
const require = convertToBulkColValues(group.map(r => ({fields: r.require})));
const fields = convertToBulkColValues(group.map(r => ({fields: r.fields || {}})));
return ["BulkAddOrUpdateRecord", tableId, require, fields, options];
});
await this._applyUserActions(tableId, [...fieldNames(records)],
actions, recordOptions);
return [];
});
}
public async destroy(recordIdOrRecordIds: Types.RecordId|Types.RecordId[]): Promise<void> {
await withRecords(recordIdOrRecordIds, async (recordIds) => {
const tableId = await this._platform.getTableId();
const actions = [['BulkRemoveRecord', tableId, recordIds]];
await this._applyUserActions(tableId, [], actions);
return [];
});
}
// Update records identified by rowIds. Any invalid id fails
// the request and returns a 400 error code.
// This is exposed as a public method to support the older /data endpoint.
public async updateRecords(columnValues: BulkColValues, rowIds: number[],
options?: OpOptions) {
await this._addOrUpdateRecords(columnValues, rowIds, 'BulkUpdateRecord', options);
}
/**
* Adds records to a table. If columnValues is an empty object (or not provided) it will create empty records.
* This is exposed as a public method to support the older /data endpoint.
* @param columnValues Optional values for fields (can be an empty object to add empty records)
* @param count Number of records to add
*/
public async addRecords(
count: number, columnValues: BulkColValues, options?: OpOptions
): Promise<number[]> {
// user actions expect [null, ...] as row ids
const rowIds = arrayRepeat(count, null);
return this._addOrUpdateRecords(columnValues, rowIds, 'BulkAddRecord', options);
}
private async _addOrUpdateRecords(
columnValues: BulkColValues, rowIds: (number | null)[],
actionType: 'BulkUpdateRecord' | 'BulkAddRecord',
options?: OpOptions
) {
const tableId = await this._platform.getTableId();
const colNames = Object.keys(columnValues);
const sandboxRes = await this._applyUserActions(
tableId, colNames,
[[actionType, tableId, rowIds, columnValues]],
options
);
return sandboxRes.retValues[0];
}
// Apply the supplied actions with the given options. The tableId and
// colNames are just to improve error reporting.
private async _applyUserActions(tableId: string, colNames: string[], actions: any[][],
options: OpOptions = {}): Promise<any> {
return handleSandboxErrorOnPlatform(tableId, colNames, this._platform.applyUserActions(
actions, {...this._defaultOptions, ...options}
), this._platform);
}
}
/**
* The services needed by TableOperationsImpl.
*/
export interface TableOperationsPlatform {
// Get the tableId of the table upon which we are supposed to operate.
getTableId(): Promise<string>;
// Throw a platform-specific error.
throwError(verb: string, text: string, status: number): never;
// Apply the supplied actions with the given options.
applyUserActions(actions: any[][], opts: any): Promise<any>;
}
export function convertToBulkColValues(records: Array<Types.Record | Types.NewRecord>): BulkColValues {
// User might want to create empty records, without providing a field name, for example for requests:
// { records: [{}] }; { records: [{fields:{}}] }
// Retrieve all field names from fields property.
const result: BulkColValues = {};
for (const fieldName of fieldNames(records)) {
result[fieldName] = records.map(record => record.fields?.[fieldName] ?? null);
}
return result;
}
export function fieldNames(records: any[]) {
return new Set<string>(flatMap(records, r => Object.keys({...r.fields, ...r.require})));
}
export function areSameFields(records: Array<Types.Record | Types.NewRecord>) {
const recordsFields = records.map(r => new Set(Object.keys(r.fields || {})));
return recordsFields.every(s => isEqual(recordsFields[0], s));
}
/**
* Adapt an operation that takes a list and returns a list to an input that may
* be a single object or a list. If input is empty list, return the empty list.
* If input is a single object, return a single object. Otherwise return a list.
*/
async function withRecords<T, T2>(recordsOrRecord: T[]|T, op: (records: T[]) => Promise<T2[]>): Promise<T2|T2[]> {
const records = Array.isArray(recordsOrRecord) ? recordsOrRecord : [recordsOrRecord];
const result = records.length == 0 ? [] : await op(records);
return Array.isArray(recordsOrRecord) ? result : result[0];
}
/**
* Catches the errors thrown by the sandbox, and converts to more descriptive ones (such as for
* invalid table names, columns, or rowIds) with better status codes. Accepts the table name, a
* list of column names in that table, and a promise for the result of the sandbox call.
*/
export async function handleSandboxErrorOnPlatform<T>(
tableId: string, colNames: string[], p: Promise<T>, platform: TableOperationsPlatform
): Promise<T> {
try {
return await p;
} catch (err) {
const message = ((err instanceof Error) && err.message?.startsWith('[Sandbox] ')) ? err.message : undefined;
if (message) {
let match = message.match(/non-existent record #([0-9]+)/);
if (match) {
platform.throwError('', `Invalid row id ${match[1]}`, 400);
}
match = message.match(
/\[Sandbox] (?:KeyError u?'(?:Table \w+ has no column )?|ValueError No such table: )(\w+)/
);
if (match) {
if (match[1] === tableId) {
platform.throwError('', `Table not found "${tableId}"`, 404);
} else if (colNames.includes(match[1])) {
platform.throwError('', `Invalid column "${match[1]}"`, 400);
}
}
platform.throwError('', `Error manipulating data: ${message}`, 400);
}
throw err;
}
}