tinybase/@types/persisters/persister-cr-sqlite-wasm/index.d.ts

A reactive data store and sync engine.

/**
 * The persister-cr-sqlite-wasm module of the TinyBase project lets you save and
 * load Store data to and from a local CR-SQLite database (in an appropriate
 * environment).
 * @see Database Persistence guide
 * @packageDocumentation
 * @module persister-cr-sqlite-wasm
 * @since v4.0.0
 */
import type {Store} from '../../store/index.d.ts';
import type {DatabasePersisterConfig, Persister} from '../index.d.ts';
import type {DB} from '@vlcn.io/crsqlite-wasm';

/**
 * The CrSqliteWasmPersister interface represents a Persister that lets you save
 * and load Store data to and from a local CR-SQLite database.
 *
 * You should use the createCrSqliteWasmPersister function to create a
 * CrSqliteWasmPersister object.
 *
 * It is a minor extension to the Persister interface and simply provides an
 * extra getDb method for accessing a reference to the database instance the
 * Store is being persisted to.
 * @category Persister
 * @since v4.3.14
 */
export interface CrSqliteWasmPersister extends Persister {
  /**
   * The getDb method returns a reference to the database instance the Store is
   * being persisted to.
   * @returns A reference to the database instance.
   * @example
   * This example creates a Persister object against a newly-created Store and
   * then gets the database instance back out again.
   *
   * ```js
   * import initWasm from '@vlcn.io/crsqlite-wasm';
   * import {createStore} from 'tinybase';
   * import {createCrSqliteWasmPersister} from 'tinybase/persisters/persister-cr-sqlite-wasm';
   *
   * const crSqlite3 = await initWasm();
   * const db = await crSqlite3.open();
   * const store = createStore().setTables({pets: {fido: {species: 'dog'}}});
   * const persister = createCrSqliteWasmPersister(store, db, 'my_tinybase');
   *
   * console.log(persister.getDb() == db);
   * // -> true
   *
   * persister.destroy();
   * ```
   * @category Getter
   * @since v4.3.14
   */
  getDb(): DB;
}

/**
 * The createCrSqliteWasmPersister function creates a CrSqliteWasmPersister
 * object that can persist the Store to a local CR-SQLite database.
 *
 * A CrSqliteWasmPersister only supports regular Store objects, and cannot be
 * used to persist the metadata of a MergeableStore.
 *
 * As well as providing a reference to the Store to persist, you must provide a
 * `db` parameter which identifies the database instance.
 *
 * A database Persister uses one of two modes: either a JSON serialization of
 * the whole Store stored in a single row of a table (the default), or a tabular
 * mapping of Table Ids to database table names and vice-versa).
 *
 * The third argument is a DatabasePersisterConfig object that configures which
 * of those modes to use, and settings for each. If the third argument is simply
 * a string, it is used as the `storeTableName` property of the JSON
 * serialization.
 *
 * See the documentation for the DpcJson and DpcTabular types for more
 * information on how both of those modes can be configured.
 * @param store The Store to persist.
 * @param db The database instance that was returned from `crSqlite3.open(...)`.
 * @param configOrStoreTableName A DatabasePersisterConfig to configure the
 * persistence mode (or a string to set the `storeTableName` property of the
 * JSON serialization).
 * @param onSqlCommand An optional handler called every time the Persister
 * executes a SQL command or query. This is suitable for logging persistence
 * behavior in a development environment, since v4.0.4.
 * @param onIgnoredError An optional handler for the errors that the Persister
 * would otherwise ignore when trying to save or load data. This is suitable for
 * debugging persistence issues in a development environment, since v4.0.4.
 * @returns A reference to the new CrSqliteWasmPersister object.
 * @example
 * This example creates a CrSqliteWasmPersister object and persists the Store to
 * a local CR-SQLite database as a JSON serialization into the `my_tinybase`
 * table. It makes a change to the database directly and then reloads it back
 * into the Store.
 *
 * ```js
 * import initWasm from '@vlcn.io/crsqlite-wasm';
 * import {createStore} from 'tinybase';
 * import {createCrSqliteWasmPersister} from 'tinybase/persisters/persister-cr-sqlite-wasm';
 *
 * const crSqlite3 = await initWasm();
 * const db = await crSqlite3.open();
 * const store = createStore().setTables({pets: {fido: {species: 'dog'}}});
 * const persister = createCrSqliteWasmPersister(store, db, 'my_tinybase');
 *
 * await persister.save();
 * // Store will be saved to the database.
 *
 * console.log(await db.execO('SELECT * FROM my_tinybase;'));
 * // -> [{_id: '_', store: '[{"pets":{"fido":{"species":"dog"}}},{}]'}]
 *
 * await db.exec(
 *   'UPDATE my_tinybase SET store = ' +
 *     `'[{"pets":{"felix":{"species":"cat"}}},{}]' WHERE _id = '_';`,
 * );
 * await persister.load();
 * console.log(store.getTables());
 * // -> {pets: {felix: {species: 'cat'}}}
 *
 * persister.destroy();
 * ```
 * @example
 * This example creates a CrSqliteWasmPersister object and persists the Store to
 * a local SQLite database with tabular mapping.
 *
 * ```js
 * import initWasm from '@vlcn.io/crsqlite-wasm';
 * import {createStore} from 'tinybase';
 * import {createCrSqliteWasmPersister} from 'tinybase/persisters/persister-cr-sqlite-wasm';
 *
 * const crSqlite3 = await initWasm();
 * const db = await crSqlite3.open();
 * const store = createStore().setTables({pets: {fido: {species: 'dog'}}});
 * const persister = createCrSqliteWasmPersister(store, db, {
 *   mode: 'tabular',
 *   tables: {load: {pets: 'pets'}, save: {pets: 'pets'}},
 * });
 *
 * await persister.save();
 * console.log(await db.execO('SELECT * FROM pets;'));
 * // -> [{_id: 'fido', species: 'dog'}]
 *
 * await db.exec(`INSERT INTO pets (_id, species) VALUES ('felix', 'cat')`);
 * await persister.load();
 * console.log(store.getTables());
 * // -> {pets: {fido: {species: 'dog'}, felix: {species: 'cat'}}}
 *
 * persister.destroy();
 * ```
 * @category Creation
 * @since v4.0.0
 */
export function createCrSqliteWasmPersister(
  store: Store,
  db: DB,
  configOrStoreTableName?: DatabasePersisterConfig | string,
  onSqlCommand?: (sql: string, params?: any[]) => void,
  onIgnoredError?: (error: any) => void,
): CrSqliteWasmPersister;