// (C) Copyright 2015 Moodle Pty Ltd. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. import { Injectable } from '@angular/core'; import { CoreApp } from '@services/app'; import { makeSingleton } from '@singletons'; import { CONFIG_TABLE_NAME, APP_SCHEMA, ConfigDBEntry } from '@services/database/config'; import { CoreDatabaseTable } from '@classes/database-table'; import { CorePromisedValue } from '@classes/promised-value'; /** * Factory to provide access to dynamic and permanent config and settings. * It should not be abused into a temporary storage. */ @Injectable({ providedIn: 'root' }) export class CoreConfigProvider { protected dbTable: CorePromisedValue; constructor() { this.dbTable = new CorePromisedValue(); } /** * Initialize database. */ async initializeDatabase(): Promise { try { await CoreApp.createTablesFromSchema(APP_SCHEMA); } catch (e) { // Ignore errors. } const db = CoreApp.getDB(); const table = await CoreConfigTable.create(db); this.dbTable.resolve(table); } /** * Deletes an app setting. * * @param name The config name. * @return Promise resolved when done. */ async delete(name: string): Promise { const table = await this.dbTable; await table.deleteByPrimaryKey({ name }); } /** * Get an app setting. * * @param name The config name. * @param defaultValue Default value to use if the entry is not found. * @return Resolves upon success along with the config data. Reject on failure. */ async get(name: string, defaultValue?: T): Promise { const table = await this.dbTable; const record = table.findByPrimaryKey({ name }); if (record !== null) { return record.value; } if (defaultValue !== undefined) { return defaultValue; } throw new Error(`Couldn't get config with name '${name}'`); } /** * Set an app setting. * * @param name The config name. * @param value The config value. Can only store number or strings. * @return Promise resolved when done. */ async set(name: string, value: number | string): Promise { const table = await this.dbTable; await table.insert({ name, value }); } } export const CoreConfig = makeSingleton(CoreConfigProvider); /** * Config database table. */ class CoreConfigTable extends CoreDatabaseTable { protected table = CONFIG_TABLE_NAME; protected primaryKeys = ['name']; }