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-/*
- *
- * 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.
- */
-"use strict";
-
-/*
- * This file is generated from kinto.js - do not modify directly.
- */
-
-// This is required because with Babel compiles ES2015 modules into a
-// require() form that tries to keep its modules on "this", but
-// doesn't specify "this", leaving it to default to the global
-// object. However, in strict mode, "this" no longer defaults to the
-// global object, so expose the global object explicitly. Babel's
-// compiled output will use a variable called "global" if one is
-// present.
-//
-// See https://bugzilla.mozilla.org/show_bug.cgi?id=1394556#c3 for
-// more details.
-const global = this;
-
-var EXPORTED_SYMBOLS = ["Kinto"];
-
-/*
- * Version 13.0.0 - 7fbf95d
- */
-
-(function (global, factory) {
- typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
- typeof define === 'function' && define.amd ? define(factory) :
- (global = global || self, global.Kinto = factory());
-}(this, (function () { 'use strict';
-
- /**
- * Base db adapter.
- *
- * @abstract
- */
- class BaseAdapter {
- /**
- * Deletes every records present in the database.
- *
- * @abstract
- * @return {Promise}
- */
- clear() {
- throw new Error("Not Implemented.");
- }
- /**
- * Executes a batch of operations within a single transaction.
- *
- * @abstract
- * @param {Function} callback The operation callback.
- * @param {Object} options The options object.
- * @return {Promise}
- */
- execute(callback, options = { preload: [] }) {
- throw new Error("Not Implemented.");
- }
- /**
- * Retrieve a record by its primary key from the database.
- *
- * @abstract
- * @param {String} id The record id.
- * @return {Promise}
- */
- get(id) {
- throw new Error("Not Implemented.");
- }
- /**
- * Lists all records from the database.
- *
- * @abstract
- * @param {Object} params The filters and order to apply to the results.
- * @return {Promise}
- */
- list(params = { filters: {}, order: "" }) {
- throw new Error("Not Implemented.");
- }
- /**
- * Store the lastModified value.
- *
- * @abstract
- * @param {Number} lastModified
- * @return {Promise}
- */
- saveLastModified(lastModified) {
- throw new Error("Not Implemented.");
- }
- /**
- * Retrieve saved lastModified value.
- *
- * @abstract
- * @return {Promise}
- */
- getLastModified() {
- throw new Error("Not Implemented.");
- }
- /**
- * Load records in bulk that were exported from a server.
- *
- * @abstract
- * @param {Array} records The records to load.
- * @return {Promise}
- */
- importBulk(records) {
- throw new Error("Not Implemented.");
- }
- /**
- * Load a dump of records exported from a server.
- *
- * @deprecated Use {@link importBulk} instead.
- * @abstract
- * @param {Array} records The records to load.
- * @return {Promise}
- */
- loadDump(records) {
- throw new Error("Not Implemented.");
- }
- saveMetadata(metadata) {
- throw new Error("Not Implemented.");
- }
- getMetadata() {
- throw new Error("Not Implemented.");
- }
- }
-
- const RE_RECORD_ID = /^[a-zA-Z0-9][a-zA-Z0-9_-]*$/;
- /**
- * Checks if a value is undefined.
- * @param {Any} value
- * @return {Boolean}
- */
- function _isUndefined(value) {
- return typeof value === "undefined";
- }
- /**
- * Sorts records in a list according to a given ordering.
- *
- * @param {String} order The ordering, eg. `-last_modified`.
- * @param {Array} list The collection to order.
- * @return {Array}
- */
- function sortObjects(order, list) {
- const hasDash = order[0] === "-";
- const field = hasDash ? order.slice(1) : order;
- const direction = hasDash ? -1 : 1;
- return list.slice().sort((a, b) => {
- if (a[field] && _isUndefined(b[field])) {
- return direction;
- }
- if (b[field] && _isUndefined(a[field])) {
- return -direction;
- }
- if (_isUndefined(a[field]) && _isUndefined(b[field])) {
- return 0;
- }
- return a[field] > b[field] ? direction : -direction;
- });
- }
- /**
- * Test if a single object matches all given filters.
- *
- * @param {Object} filters The filters object.
- * @param {Object} entry The object to filter.
- * @return {Boolean}
- */
- function filterObject(filters, entry) {
- return Object.keys(filters).every(filter => {
- const value = filters[filter];
- if (Array.isArray(value)) {
- return value.some(candidate => candidate === entry[filter]);
- }
- else if (typeof value === "object") {
- return filterObject(value, entry[filter]);
- }
- else if (!Object.prototype.hasOwnProperty.call(entry, filter)) {
- console.error(`The property ${filter} does not exist`);
- return false;
- }
- return entry[filter] === value;
- });
- }
- /**
- * Resolves a list of functions sequentially, which can be sync or async; in
- * case of async, functions must return a promise.
- *
- * @param {Array} fns The list of functions.
- * @param {Any} init The initial value.
- * @return {Promise}
- */
- function waterfall(fns, init) {
- if (!fns.length) {
- return Promise.resolve(init);
- }
- return fns.reduce((promise, nextFn) => {
- return promise.then(nextFn);
- }, Promise.resolve(init));
- }
- /**
- * Simple deep object comparison function. This only supports comparison of
- * serializable JavaScript objects.
- *
- * @param {Object} a The source object.
- * @param {Object} b The compared object.
- * @return {Boolean}
- */
- function deepEqual(a, b) {
- if (a === b) {
- return true;
- }
- if (typeof a !== typeof b) {
- return false;
- }
- if (!(a && typeof a == "object") || !(b && typeof b == "object")) {
- return false;
- }
- if (Object.keys(a).length !== Object.keys(b).length) {
- return false;
- }
- for (const k in a) {
- if (!deepEqual(a[k], b[k])) {
- return false;
- }
- }
- return true;
- }
- /**
- * Return an object without the specified keys.
- *
- * @param {Object} obj The original object.
- * @param {Array} keys The list of keys to exclude.
- * @return {Object} A copy without the specified keys.
- */
- function omitKeys(obj, keys = []) {
- const result = Object.assign({}, obj);
- for (const key of keys) {
- delete result[key];
- }
- return result;
- }
- function arrayEqual(a, b) {
- if (a.length !== b.length) {
- return false;
- }
- for (let i = a.length; i--;) {
- if (a[i] !== b[i]) {
- return false;
- }
- }
- return true;
- }
- function makeNestedObjectFromArr(arr, val, nestedFiltersObj) {
- const last = arr.length - 1;
- return arr.reduce((acc, cv, i) => {
- if (i === last) {
- return (acc[cv] = val);
- }
- else if (Object.prototype.hasOwnProperty.call(acc, cv)) {
- return acc[cv];
- }
- else {
- return (acc[cv] = {});
- }
- }, nestedFiltersObj);
- }
- function transformSubObjectFilters(filtersObj) {
- const transformedFilters = {};
- for (const key in filtersObj) {
- const keysArr = key.split(".");
- const val = filtersObj[key];
- makeNestedObjectFromArr(keysArr, val, transformedFilters);
- }
- return transformedFilters;
- }
-
- const INDEXED_FIELDS = ["id", "_status", "last_modified"];
- /**
- * Small helper that wraps the opening of an IndexedDB into a Promise.
- *
- * @param dbname {String} The database name.
- * @param version {Integer} Schema version
- * @param onupgradeneeded {Function} The callback to execute if schema is
- * missing or different.
- * @return {Promise<IDBDatabase>}
- */
- async function open(dbname, { version, onupgradeneeded }) {
- return new Promise((resolve, reject) => {
- const request = indexedDB.open(dbname, version);
- request.onupgradeneeded = event => {
- const db = event.target.result;
- db.onerror = event => reject(event.target.error);
- // When an upgrade is needed, a transaction is started.
- const transaction = event.target.transaction;
- transaction.onabort = event => {
- const error = event.target.error ||
- transaction.error ||
- new DOMException("The operation has been aborted", "AbortError");
- reject(error);
- };
- // Callback for store creation etc.
- return onupgradeneeded(event);
- };
- request.onerror = event => {
- reject(event.target.error);
- };
- request.onsuccess = event => {
- const db = event.target.result;
- resolve(db);
- };
- });
- }
- /**
- * Helper to run the specified callback in a single transaction on the
- * specified store.
- * The helper focuses on transaction wrapping into a promise.
- *
- * @param db {IDBDatabase} The database instance.
- * @param name {String} The store name.
- * @param callback {Function} The piece of code to execute in the transaction.
- * @param options {Object} Options.
- * @param options.mode {String} Transaction mode (default: read).
- * @return {Promise} any value returned by the callback.
- */
- async function execute(db, name, callback, options = {}) {
- const { mode } = options;
- return new Promise((resolve, reject) => {
- // On Safari, calling IDBDatabase.transaction with mode == undefined raises
- // a TypeError.
- const transaction = mode
- ? db.transaction([name], mode)
- : db.transaction([name]);
- const store = transaction.objectStore(name);
- // Let the callback abort this transaction.
- const abort = e => {
- transaction.abort();
- reject(e);
- };
- // Execute the specified callback **synchronously**.
- let result;
- try {
- result = callback(store, abort);
- }
- catch (e) {
- abort(e);
- }
- transaction.onerror = event => reject(event.target.error);
- transaction.oncomplete = event => resolve(result);
- transaction.onabort = event => {
- const error = event.target.error ||
- transaction.error ||
- new DOMException("The operation has been aborted", "AbortError");
- reject(error);
- };
- });
- }
- /**
- * Helper to wrap the deletion of an IndexedDB database into a promise.
- *
- * @param dbName {String} the database to delete
- * @return {Promise}
- */
- async function deleteDatabase(dbName) {
- return new Promise((resolve, reject) => {
- const request = indexedDB.deleteDatabase(dbName);
- request.onsuccess = event => resolve(event.target);
- request.onerror = event => reject(event.target.error);
- });
- }
- /**
- * IDB cursor handlers.
- * @type {Object}
- */
- const cursorHandlers = {
- all(filters, done) {
- const results = [];
- return event => {
- const cursor = event.target.result;
- if (cursor) {
- const { value } = cursor;
- if (filterObject(filters, value)) {
- results.push(value);
- }
- cursor.continue();
- }
- else {
- done(results);
- }
- };
- },
- in(values, filters, done) {
- const results = [];
- let i = 0;
- return function (event) {
- const cursor = event.target.result;
- if (!cursor) {
- done(results);
- return;
- }
- const { key, value } = cursor;
- // `key` can be an array of two values (see `keyPath` in indices definitions).
- // `values` can be an array of arrays if we filter using an index whose key path
- // is an array (eg. `cursorHandlers.in([["bid/cid", 42], ["bid/cid", 43]], ...)`)
- while (key > values[i]) {
- // The cursor has passed beyond this key. Check next.
- ++i;
- if (i === values.length) {
- done(results); // There is no next. Stop searching.
- return;
- }
- }
- const isEqual = Array.isArray(key)
- ? arrayEqual(key, values[i])
- : key === values[i];
- if (isEqual) {
- if (filterObject(filters, value)) {
- results.push(value);
- }
- cursor.continue();
- }
- else {
- cursor.continue(values[i]);
- }
- };
- },
- };
- /**
- * Creates an IDB request and attach it the appropriate cursor event handler to
- * perform a list query.
- *
- * Multiple matching values are handled by passing an array.
- *
- * @param {String} cid The collection id (ie. `{bid}/{cid}`)
- * @param {IDBStore} store The IDB store.
- * @param {Object} filters Filter the records by field.
- * @param {Function} done The operation completion handler.
- * @return {IDBRequest}
- */
- function createListRequest(cid, store, filters, done) {
- const filterFields = Object.keys(filters);
- // If no filters, get all results in one bulk.
- if (filterFields.length == 0) {
- const request = store.index("cid").getAll(IDBKeyRange.only(cid));
- request.onsuccess = event => done(event.target.result);
- return request;
- }
- // Introspect filters and check if they leverage an indexed field.
- const indexField = filterFields.find(field => {
- return INDEXED_FIELDS.includes(field);
- });
- if (!indexField) {
- // Iterate on all records for this collection (ie. cid)
- const isSubQuery = Object.keys(filters).some(key => key.includes(".")); // (ie. filters: {"article.title": "hello"})
- if (isSubQuery) {
- const newFilter = transformSubObjectFilters(filters);
- const request = store.index("cid").openCursor(IDBKeyRange.only(cid));
- request.onsuccess = cursorHandlers.all(newFilter, done);
- return request;
- }
- const request = store.index("cid").openCursor(IDBKeyRange.only(cid));
- request.onsuccess = cursorHandlers.all(filters, done);
- return request;
- }
- // If `indexField` was used already, don't filter again.
- const remainingFilters = omitKeys(filters, [indexField]);
- // value specified in the filter (eg. `filters: { _status: ["created", "updated"] }`)
- const value = filters[indexField];
- // For the "id" field, use the primary key.
- const indexStore = indexField == "id" ? store : store.index(indexField);
- // WHERE IN equivalent clause
- if (Array.isArray(value)) {
- if (value.length === 0) {
- return done([]);
- }
- const values = value.map(i => [cid, i]).sort();
- const range = IDBKeyRange.bound(values[0], values[values.length - 1]);
- const request = indexStore.openCursor(range);
- request.onsuccess = cursorHandlers.in(values, remainingFilters, done);
- return request;
- }
- // If no filters on custom attribute, get all results in one bulk.
- if (remainingFilters.length == 0) {
- const request = indexStore.getAll(IDBKeyRange.only([cid, value]));
- request.onsuccess = event => done(event.target.result);
- return request;
- }
- // WHERE field = value clause
- const request = indexStore.openCursor(IDBKeyRange.only([cid, value]));
- request.onsuccess = cursorHandlers.all(remainingFilters, done);
- return request;
- }
- class IDBError extends Error {
- constructor(method, err) {
- super(`IndexedDB ${method}() ${err.message}`);
- this.name = err.name;
- this.stack = err.stack;
- }
- }
- /**
- * IndexedDB adapter.
- *
- * This adapter doesn't support any options.
- */
- class IDB extends BaseAdapter {
- /* Expose the IDBError class publicly */
- static get IDBError() {
- return IDBError;
- }
- /**
- * Constructor.
- *
- * @param {String} cid The key base for this collection (eg. `bid/cid`)
- * @param {Object} options
- * @param {String} options.dbName The IndexedDB name (default: `"KintoDB"`)
- * @param {String} options.migrateOldData Whether old database data should be migrated (default: `false`)
- */
- constructor(cid, options = {}) {
- super();
- this.cid = cid;
- this.dbName = options.dbName || "KintoDB";
- this._options = options;
- this._db = null;
- }
- _handleError(method, err) {
- throw new IDBError(method, err);
- }
- /**
- * Ensures a connection to the IndexedDB database has been opened.
- *
- * @override
- * @return {Promise}
- */
- async open() {
- if (this._db) {
- return this;
- }
- // In previous versions, we used to have a database with name `${bid}/${cid}`.
- // Check if it exists, and migrate data once new schema is in place.
- // Note: the built-in migrations from IndexedDB can only be used if the
- // database name does not change.
- const dataToMigrate = this._options.migrateOldData
- ? await migrationRequired(this.cid)
- : null;
- this._db = await open(this.dbName, {
- version: 2,
- onupgradeneeded: event => {
- const db = event.target.result;
- if (event.oldVersion < 1) {
- // Records store
- const recordsStore = db.createObjectStore("records", {
- keyPath: ["_cid", "id"],
- });
- // An index to obtain all the records in a collection.
- recordsStore.createIndex("cid", "_cid");
- // Here we create indices for every known field in records by collection.
- // Local record status ("synced", "created", "updated", "deleted")
- recordsStore.createIndex("_status", ["_cid", "_status"]);
- // Last modified field
- recordsStore.createIndex("last_modified", ["_cid", "last_modified"]);
- // Timestamps store
- db.createObjectStore("timestamps", {
- keyPath: "cid",
- });
- }
- if (event.oldVersion < 2) {
- // Collections store
- db.createObjectStore("collections", {
- keyPath: "cid",
- });
- }
- },
- });
- if (dataToMigrate) {
- const { records, timestamp } = dataToMigrate;
- await this.importBulk(records);
- await this.saveLastModified(timestamp);
- console.log(`${this.cid}: data was migrated successfully.`);
- // Delete the old database.
- await deleteDatabase(this.cid);
- console.warn(`${this.cid}: old database was deleted.`);
- }
- return this;
- }
- /**
- * Closes current connection to the database.
- *
- * @override
- * @return {Promise}
- */
- close() {
- if (this._db) {
- this._db.close(); // indexedDB.close is synchronous
- this._db = null;
- }
- return Promise.resolve();
- }
- /**
- * Returns a transaction and an object store for a store name.
- *
- * To determine if a transaction has completed successfully, we should rather
- * listen to the transaction’s complete event rather than the IDBObjectStore
- * request’s success event, because the transaction may still fail after the
- * success event fires.
- *
- * @param {String} name Store name
- * @param {Function} callback to execute
- * @param {Object} options Options
- * @param {String} options.mode Transaction mode ("readwrite" or undefined)
- * @return {Object}
- */
- async prepare(name, callback, options) {
- await this.open();
- await execute(this._db, name, callback, options);
- }
- /**
- * Deletes every records in the current collection.
- *
- * @override
- * @return {Promise}
- */
- async clear() {
- try {
- await this.prepare("records", store => {
- const range = IDBKeyRange.only(this.cid);
- const request = store.index("cid").openKeyCursor(range);
- request.onsuccess = event => {
- const cursor = event.target.result;
- if (cursor) {
- store.delete(cursor.primaryKey);
- cursor.continue();
- }
- };
- return request;
- }, { mode: "readwrite" });
- }
- catch (e) {
- this._handleError("clear", e);
- }
- }
- /**
- * Executes the set of synchronous CRUD operations described in the provided
- * callback within an IndexedDB transaction, for current db store.
- *
- * The callback will be provided an object exposing the following synchronous
- * CRUD operation methods: get, create, update, delete.
- *
- * Important note: because limitations in IndexedDB implementations, no
- * asynchronous code should be performed within the provided callback; the
- * promise will therefore be rejected if the callback returns a Promise.
- *
- * Options:
- * - {Array} preload: The list of record IDs to fetch and make available to
- * the transaction object get() method (default: [])
- *
- * @example
- * const db = new IDB("example");
- * const result = await db.execute(transaction => {
- * transaction.create({id: 1, title: "foo"});
- * transaction.update({id: 2, title: "bar"});
- * transaction.delete(3);
- * return "foo";
- * });
- *
- * @override
- * @param {Function} callback The operation description callback.
- * @param {Object} options The options object.
- * @return {Promise}
- */
- async execute(callback, options = { preload: [] }) {
- // Transactions in IndexedDB are autocommited when a callback does not
- // perform any additional operation.
- // The way Promises are implemented in Firefox (see https://bugzilla.mozilla.org/show_bug.cgi?id=1193394)
- // prevents using within an opened transaction.
- // To avoid managing asynchronocity in the specified `callback`, we preload
- // a list of record in order to execute the `callback` synchronously.
- // See also:
- // - http://stackoverflow.com/a/28388805/330911
- // - http://stackoverflow.com/a/10405196
- // - https://jakearchibald.com/2015/tasks-microtasks-queues-and-schedules/
- let result;
- await this.prepare("records", (store, abort) => {
- const runCallback = (preloaded = []) => {
- // Expose a consistent API for every adapter instead of raw store methods.
- const proxy = transactionProxy(this, store, preloaded);
- // The callback is executed synchronously within the same transaction.
- try {
- const returned = callback(proxy);
- if (returned instanceof Promise) {
- // XXX: investigate how to provide documentation details in error.
- throw new Error("execute() callback should not return a Promise.");
- }
- // Bring to scope that will be returned (once promise awaited).
- result = returned;
- }
- catch (e) {
- // The callback has thrown an error explicitly. Abort transaction cleanly.
- abort(e);
- }
- };
- // No option to preload records, go straight to `callback`.
- if (!options.preload.length) {
- return runCallback();
- }
- // Preload specified records using a list request.
- const filters = { id: options.preload };
- createListRequest(this.cid, store, filters, records => {
- // Store obtained records by id.
- const preloaded = {};
- for (const record of records) {
- delete record["_cid"];
- preloaded[record.id] = record;
- }
- runCallback(preloaded);
- });
- }, { mode: "readwrite" });
- return result;
- }
- /**
- * Retrieve a record by its primary key from the IndexedDB database.
- *
- * @override
- * @param {String} id The record id.
- * @return {Promise}
- */
- async get(id) {
- try {
- let record;
- await this.prepare("records", store => {
- store.get([this.cid, id]).onsuccess = e => (record = e.target.result);
- });
- return record;
- }
- catch (e) {
- this._handleError("get", e);
- }
- }
- /**
- * Lists all records from the IndexedDB database.
- *
- * @override
- * @param {Object} params The filters and order to apply to the results.
- * @return {Promise}
- */
- async list(params = { filters: {} }) {
- const { filters } = params;
- try {
- let results = [];
- await this.prepare("records", store => {
- createListRequest(this.cid, store, filters, _results => {
- // we have received all requested records that match the filters,
- // we now park them within current scope and hide the `_cid` attribute.
- for (const result of _results) {
- delete result["_cid"];
- }
- results = _results;
- });
- });
- // The resulting list of records is sorted.
- // XXX: with some efforts, this could be fully implemented using IDB API.
- return params.order ? sortObjects(params.order, results) : results;
- }
- catch (e) {
- this._handleError("list", e);
- }
- }
- /**
- * Store the lastModified value into metadata store.
- *
- * @override
- * @param {Number} lastModified
- * @return {Promise}
- */
- async saveLastModified(lastModified) {
- const value = parseInt(lastModified, 10) || null;
- try {
- await this.prepare("timestamps", store => {
- if (value === null) {
- store.delete(this.cid);
- }
- else {
- store.put({ cid: this.cid, value });
- }
- }, { mode: "readwrite" });
- return value;
- }
- catch (e) {
- this._handleError("saveLastModified", e);
- }
- }
- /**
- * Retrieve saved lastModified value.
- *
- * @override
- * @return {Promise}
- */
- async getLastModified() {
- try {
- let entry = null;
- await this.prepare("timestamps", store => {
- store.get(this.cid).onsuccess = e => (entry = e.target.result);
- });
- return entry ? entry.value : null;
- }
- catch (e) {
- this._handleError("getLastModified", e);
- }
- }
- /**
- * Load a dump of records exported from a server.
- *
- * @deprecated Use {@link importBulk} instead.
- * @abstract
- * @param {Array} records The records to load.
- * @return {Promise}
- */
- async loadDump(records) {
- return this.importBulk(records);
- }
- /**
- * Load records in bulk that were exported from a server.
- *
- * @abstract
- * @param {Array} records The records to load.
- * @return {Promise}
- */
- async importBulk(records) {
- try {
- await this.execute(transaction => {
- // Since the put operations are asynchronous, we chain
- // them together. The last one will be waited for the
- // `transaction.oncomplete` callback. (see #execute())
- let i = 0;
- putNext();
- function putNext() {
- if (i == records.length) {
- return;
- }
- // On error, `transaction.onerror` is called.
- transaction.update(records[i]).onsuccess = putNext;
- ++i;
- }
- });
- const previousLastModified = await this.getLastModified();
- const lastModified = Math.max(...records.map(record => record.last_modified));
- if (lastModified > previousLastModified) {
- await this.saveLastModified(lastModified);
- }
- return records;
- }
- catch (e) {
- this._handleError("importBulk", e);
- }
- }
- async saveMetadata(metadata) {
- try {
- await this.prepare("collections", store => store.put({ cid: this.cid, metadata }), { mode: "readwrite" });
- return metadata;
- }
- catch (e) {
- this._handleError("saveMetadata", e);
- }
- }
- async getMetadata() {
- try {
- let entry = null;
- await this.prepare("collections", store => {
- store.get(this.cid).onsuccess = e => (entry = e.target.result);
- });
- return entry ? entry.metadata : null;
- }
- catch (e) {
- this._handleError("getMetadata", e);
- }
- }
- }
- /**
- * IDB transaction proxy.
- *
- * @param {IDB} adapter The call IDB adapter
- * @param {IDBStore} store The IndexedDB database store.
- * @param {Array} preloaded The list of records to make available to
- * get() (default: []).
- * @return {Object}
- */
- function transactionProxy(adapter, store, preloaded = []) {
- const _cid = adapter.cid;
- return {
- create(record) {
- store.add(Object.assign(Object.assign({}, record), { _cid }));
- },
- update(record) {
- return store.put(Object.assign(Object.assign({}, record), { _cid }));
- },
- delete(id) {
- store.delete([_cid, id]);
- },
- get(id) {
- return preloaded[id];
- },
- };
- }
- /**
- * Up to version 10.X of kinto.js, each collection had its own collection.
- * The database name was `${bid}/${cid}` (eg. `"blocklists/certificates"`)
- * and contained only one store with the same name.
- */
- async function migrationRequired(dbName) {
- let exists = true;
- const db = await open(dbName, {
- version: 1,
- onupgradeneeded: event => {
- exists = false;
- },
- });
- // Check that the DB we're looking at is really a legacy one,
- // and not some remainder of the open() operation above.
- exists &=
- db.objectStoreNames.contains("__meta__") &&
- db.objectStoreNames.contains(dbName);
- if (!exists) {
- db.close();
- // Testing the existence creates it, so delete it :)
- await deleteDatabase(dbName);
- return null;
- }
- console.warn(`${dbName}: old IndexedDB database found.`);
- try {
- // Scan all records.
- let records;
- await execute(db, dbName, store => {
- store.openCursor().onsuccess = cursorHandlers.all({}, res => (records = res));
- });
- console.log(`${dbName}: found ${records.length} records.`);
- // Check if there's a entry for this.
- let timestamp = null;
- await execute(db, "__meta__", store => {
- store.get(`${dbName}-lastModified`).onsuccess = e => {
- timestamp = e.target.result ? e.target.result.value : null;
- };
- });
- // Some previous versions, also used to store the timestamps without prefix.
- if (!timestamp) {
- await execute(db, "__meta__", store => {
- store.get("lastModified").onsuccess = e => {
- timestamp = e.target.result ? e.target.result.value : null;
- };
- });
- }
- console.log(`${dbName}: ${timestamp ? "found" : "no"} timestamp.`);
- // Those will be inserted in the new database/schema.
- return { records, timestamp };
- }
- catch (e) {
- console.error("Error occured during migration", e);
- return null;
- }
- finally {
- db.close();
- }
- }
-
- var uuid4 = {};
-
- const RECORD_FIELDS_TO_CLEAN = ["_status"];
- const AVAILABLE_HOOKS = ["incoming-changes"];
- const IMPORT_CHUNK_SIZE = 200;
- /**
- * Compare two records omitting local fields and synchronization
- * attributes (like _status and last_modified)
- * @param {Object} a A record to compare.
- * @param {Object} b A record to compare.
- * @param {Array} localFields Additional fields to ignore during the comparison
- * @return {boolean}
- */
- function recordsEqual(a, b, localFields = []) {
- const fieldsToClean = RECORD_FIELDS_TO_CLEAN.concat(["last_modified"]).concat(localFields);
- const cleanLocal = r => omitKeys(r, fieldsToClean);
- return deepEqual(cleanLocal(a), cleanLocal(b));
- }
- /**
- * Synchronization result object.
- */
- class SyncResultObject {
- /**
- * Public constructor.
- */
- constructor() {
- /**
- * Current synchronization result status; becomes `false` when conflicts or
- * errors are registered.
- * @type {Boolean}
- */
- this.lastModified = null;
- this._lists = {};
- [
- "errors",
- "created",
- "updated",
- "deleted",
- "published",
- "conflicts",
- "skipped",
- "resolved",
- "void",
- ].forEach(l => (this._lists[l] = []));
- this._cached = {};
- }
- /**
- * Adds entries for a given result type.
- *
- * @param {String} type The result type.
- * @param {Array} entries The result entries.
- * @return {SyncResultObject}
- */
- add(type, entries) {
- if (!Array.isArray(this._lists[type])) {
- console.warn(`Unknown type "${type}"`);
- return;
- }
- if (!Array.isArray(entries)) {
- entries = [entries];
- }
- this._lists[type] = this._lists[type].concat(entries);
- delete this._cached[type];
- return this;
- }
- get ok() {
- return this.errors.length + this.conflicts.length === 0;
- }
- get errors() {
- return this._lists["errors"];
- }
- get conflicts() {
- return this._lists["conflicts"];
- }
- get skipped() {
- return this._deduplicate("skipped");
- }
- get resolved() {
- return this._deduplicate("resolved");
- }
- get created() {
- return this._deduplicate("created");
- }
- get updated() {
- return this._deduplicate("updated");
- }
- get deleted() {
- return this._deduplicate("deleted");
- }
- get published() {
- return this._deduplicate("published");
- }
- _deduplicate(list) {
- if (!(list in this._cached)) {
- // Deduplicate entries by id. If the values don't have `id` attribute, just
- // keep all.
- const recordsWithoutId = new Set();
- const recordsById = new Map();
- this._lists[list].forEach(record => {
- if (!record.id) {
- recordsWithoutId.add(record);
- }
- else {
- recordsById.set(record.id, record);
- }
- });
- this._cached[list] = Array.from(recordsById.values()).concat(Array.from(recordsWithoutId));
- }
- return this._cached[list];
- }
- /**
- * Reinitializes result entries for a given result type.
- *
- * @param {String} type The result type.
- * @return {SyncResultObject}
- */
- reset(type) {
- this._lists[type] = [];
- delete this._cached[type];
- return this;
- }
- toObject() {
- // Only used in tests.
- return {
- ok: this.ok,
- lastModified: this.lastModified,
- errors: this.errors,
- created: this.created,
- updated: this.updated,
- deleted: this.deleted,
- skipped: this.skipped,
- published: this.published,
- conflicts: this.conflicts,
- resolved: this.resolved,
- };
- }
- }
- class ServerWasFlushedError extends Error {
- constructor(clientTimestamp, serverTimestamp, message) {
- super(message);
- if (Error.captureStackTrace) {
- Error.captureStackTrace(this, ServerWasFlushedError);
- }
- this.clientTimestamp = clientTimestamp;
- this.serverTimestamp = serverTimestamp;
- }
- }
- function createUUIDSchema() {
- return {
- generate() {
- return uuid4();
- },
- validate(id) {
- return typeof id == "string" && RE_RECORD_ID.test(id);
- },
- };
- }
- function markStatus(record, status) {
- return Object.assign(Object.assign({}, record), { _status: status });
- }
- function markDeleted(record) {
- return markStatus(record, "deleted");
- }
- function markSynced(record) {
- return markStatus(record, "synced");
- }
- /**
- * Import a remote change into the local database.
- *
- * @param {IDBTransactionProxy} transaction The transaction handler.
- * @param {Object} remote The remote change object to import.
- * @param {Array<String>} localFields The list of fields that remain local.
- * @param {String} strategy The {@link Collection.strategy}.
- * @return {Object}
- */
- function importChange(transaction, remote, localFields, strategy) {
- const local = transaction.get(remote.id);
- if (!local) {
- // Not found locally but remote change is marked as deleted; skip to
- // avoid recreation.
- if (remote.deleted) {
- return { type: "skipped", data: remote };
- }
- const synced = markSynced(remote);
- transaction.create(synced);
- return { type: "created", data: synced };
- }
- // Apply remote changes on local record.
- const synced = Object.assign(Object.assign({}, local), markSynced(remote));
- // With pull only, we don't need to compare records since we override them.
- if (strategy === Collection.strategy.PULL_ONLY) {
- if (remote.deleted) {
- transaction.delete(remote.id);
- return { type: "deleted", data: local };
- }
- transaction.update(synced);
- return { type: "updated", data: { old: local, new: synced } };
- }
- // With other sync strategies, we detect conflicts,
- // by comparing local and remote, ignoring local fields.
- const isIdentical = recordsEqual(local, remote, localFields);
- // Detect or ignore conflicts if record has also been modified locally.
- if (local._status !== "synced") {
- // Locally deleted, unsynced: scheduled for remote deletion.
- if (local._status === "deleted") {
- return { type: "skipped", data: local };
- }
- if (isIdentical) {
- // If records are identical, import anyway, so we bump the
- // local last_modified value from the server and set record
- // status to "synced".
- transaction.update(synced);
- return { type: "updated", data: { old: local, new: synced } };
- }
- if (local.last_modified !== undefined &&
- local.last_modified === remote.last_modified) {
- // If our local version has the same last_modified as the remote
- // one, this represents an object that corresponds to a resolved
- // conflict. Our local version represents the final output, so
- // we keep that one. (No transaction operation to do.)
- // But if our last_modified is undefined,
- // that means we've created the same object locally as one on
- // the server, which *must* be a conflict.
- return { type: "void" };
- }
- return {
- type: "conflicts",
- data: { type: "incoming", local: local, remote: remote },
- };
- }
- // Local record was synced.
- if (remote.deleted) {
- transaction.delete(remote.id);
- return { type: "deleted", data: local };
- }
- // Import locally.
- transaction.update(synced);
- // if identical, simply exclude it from all SyncResultObject lists
- const type = isIdentical ? "void" : "updated";
- return { type, data: { old: local, new: synced } };
- }
- /**
- * Abstracts a collection of records stored in the local database, providing
- * CRUD operations and synchronization helpers.
- */
- class Collection {
- /**
- * Constructor.
- *
- * Options:
- * - `{BaseAdapter} adapter` The DB adapter (default: `IDB`)
- *
- * @param {String} bucket The bucket identifier.
- * @param {String} name The collection name.
- * @param {KintoBase} kinto The Kinto instance.
- * @param {Object} options The options object.
- */
- constructor(bucket, name, kinto, options = {}) {
- this._bucket = bucket;
- this._name = name;
- this._lastModified = null;
- const DBAdapter = options.adapter || IDB;
- if (!DBAdapter) {
- throw new Error("No adapter provided");
- }
- const db = new DBAdapter(`${bucket}/${name}`, options.adapterOptions);
- if (!(db instanceof BaseAdapter)) {
- throw new Error("Unsupported adapter.");
- }
- // public properties
- /**
- * The db adapter instance
- * @type {BaseAdapter}
- */
- this.db = db;
- /**
- * The KintoBase instance.
- * @type {KintoBase}
- */
- this.kinto = kinto;
- /**
- * The event emitter instance.
- * @type {EventEmitter}
- */
- this.events = options.events;
- /**
- * The IdSchema instance.
- * @type {Object}
- */
- this.idSchema = this._validateIdSchema(options.idSchema);
- /**
- * The list of remote transformers.
- * @type {Array}
- */
- this.remoteTransformers = this._validateRemoteTransformers(options.remoteTransformers);
- /**
- * The list of hooks.
- * @type {Object}
- */
- this.hooks = this._validateHooks(options.hooks);
- /**
- * The list of fields names that will remain local.
- * @type {Array}
- */
- this.localFields = options.localFields || [];
- }
- /**
- * The HTTP client.
- * @type {KintoClient}
- */
- get api() {
- return this.kinto.api;
- }
- /**
- * The collection name.
- * @type {String}
- */
- get name() {
- return this._name;
- }
- /**
- * The bucket name.
- * @type {String}
- */
- get bucket() {
- return this._bucket;
- }
- /**
- * The last modified timestamp.
- * @type {Number}
- */
- get lastModified() {
- return this._lastModified;
- }
- /**
- * Synchronization strategies. Available strategies are:
- *
- * - `MANUAL`: Conflicts will be reported in a dedicated array.
- * - `SERVER_WINS`: Conflicts are resolved using remote data.
- * - `CLIENT_WINS`: Conflicts are resolved using local data.
- *
- * @type {Object}
- */
- static get strategy() {
- return {
- CLIENT_WINS: "client_wins",
- SERVER_WINS: "server_wins",
- PULL_ONLY: "pull_only",
- MANUAL: "manual",
- };
- }
- /**
- * Validates an idSchema.
- *
- * @param {Object|undefined} idSchema
- * @return {Object}
- */
- _validateIdSchema(idSchema) {
- if (typeof idSchema === "undefined") {
- return createUUIDSchema();
- }
- if (typeof idSchema !== "object") {
- throw new Error("idSchema must be an object.");
- }
- else if (typeof idSchema.generate !== "function") {
- throw new Error("idSchema must provide a generate function.");
- }
- else if (typeof idSchema.validate !== "function") {
- throw new Error("idSchema must provide a validate function.");
- }
- return idSchema;
- }
- /**
- * Validates a list of remote transformers.
- *
- * @param {Array|undefined} remoteTransformers
- * @return {Array}
- */
- _validateRemoteTransformers(remoteTransformers) {
- if (typeof remoteTransformers === "undefined") {
- return [];
- }
- if (!Array.isArray(remoteTransformers)) {
- throw new Error("remoteTransformers should be an array.");
- }
- return remoteTransformers.map(transformer => {
- if (typeof transformer !== "object") {
- throw new Error("A transformer must be an object.");
- }
- else if (typeof transformer.encode !== "function") {
- throw new Error("A transformer must provide an encode function.");
- }
- else if (typeof transformer.decode !== "function") {
- throw new Error("A transformer must provide a decode function.");
- }
- return transformer;
- });
- }
- /**
- * Validate the passed hook is correct.
- *
- * @param {Array|undefined} hook.
- * @return {Array}
- **/
- _validateHook(hook) {
- if (!Array.isArray(hook)) {
- throw new Error("A hook definition should be an array of functions.");
- }
- return hook.map(fn => {
- if (typeof fn !== "function") {
- throw new Error("A hook definition should be an array of functions.");
- }
- return fn;
- });
- }
- /**
- * Validates a list of hooks.
- *
- * @param {Object|undefined} hooks
- * @return {Object}
- */
- _validateHooks(hooks) {
- if (typeof hooks === "undefined") {
- return {};
- }
- if (Array.isArray(hooks)) {
- throw new Error("hooks should be an object, not an array.");
- }
- if (typeof hooks !== "object") {
- throw new Error("hooks should be an object.");
- }
- const validatedHooks = {};
- for (const hook in hooks) {
- if (!AVAILABLE_HOOKS.includes(hook)) {
- throw new Error("The hook should be one of " + AVAILABLE_HOOKS.join(", "));
- }
- validatedHooks[hook] = this._validateHook(hooks[hook]);
- }
- return validatedHooks;
- }
- /**
- * Deletes every records in the current collection and marks the collection as
- * never synced.
- *
- * @return {Promise}
- */
- async clear() {
- await this.db.clear();
- await this.db.saveMetadata(null);
- await this.db.saveLastModified(null);
- return { data: [], permissions: {} };
- }
- /**
- * Encodes a record.
- *
- * @param {String} type Either "remote" or "local".
- * @param {Object} record The record object to encode.
- * @return {Promise}
- */
- _encodeRecord(type, record) {
- if (!this[`${type}Transformers`].length) {
- return Promise.resolve(record);
- }
- return waterfall(this[`${type}Transformers`].map(transformer => {
- return record => transformer.encode(record);
- }), record);
- }
- /**
- * Decodes a record.
- *
- * @param {String} type Either "remote" or "local".
- * @param {Object} record The record object to decode.
- * @return {Promise}
- */
- _decodeRecord(type, record) {
- if (!this[`${type}Transformers`].length) {
- return Promise.resolve(record);
- }
- return waterfall(this[`${type}Transformers`].reverse().map(transformer => {
- return record => transformer.decode(record);
- }), record);
- }
- /**
- * Adds a record to the local database, asserting that none
- * already exist with this ID.
- *
- * Note: If either the `useRecordId` or `synced` options are true, then the
- * record object must contain the id field to be validated. If none of these
- * options are true, an id is generated using the current IdSchema; in this
- * case, the record passed must not have an id.
- *
- * Options:
- * - {Boolean} synced Sets record status to "synced" (default: `false`).
- * - {Boolean} useRecordId Forces the `id` field from the record to be used,
- * instead of one that is generated automatically
- * (default: `false`).
- *
- * @param {Object} record
- * @param {Object} options
- * @return {Promise}
- */
- create(record, options = { useRecordId: false, synced: false }) {
- // Validate the record and its ID (if any), even though this
- // validation is also done in the CollectionTransaction method,
- // because we need to pass the ID to preloadIds.
- const reject = msg => Promise.reject(new Error(msg));
- if (typeof record !== "object") {
- return reject("Record is not an object.");
- }
- if ((options.synced || options.useRecordId) &&
- !Object.prototype.hasOwnProperty.call(record, "id")) {
- return reject("Missing required Id; synced and useRecordId options require one");
- }
- if (!options.synced &&
- !options.useRecordId &&
- Object.prototype.hasOwnProperty.call(record, "id")) {
- return reject("Extraneous Id; can't create a record having one set.");
- }
- const newRecord = Object.assign(Object.assign({}, record), { id: options.synced || options.useRecordId
- ? record.id
- : this.idSchema.generate(record), _status: options.synced ? "synced" : "created" });
- if (!this.idSchema.validate(newRecord.id)) {
- return reject(`Invalid Id: ${newRecord.id}`);
- }
- return this.execute(txn => txn.create(newRecord), {
- preloadIds: [newRecord.id],
- }).catch(err => {
- if (options.useRecordId) {
- throw new Error("Couldn't create record. It may have been virtually deleted.");
- }
- throw err;
- });
- }
- /**
- * Like {@link CollectionTransaction#update}, but wrapped in its own transaction.
- *
- * Options:
- * - {Boolean} synced: Sets record status to "synced" (default: false)
- * - {Boolean} patch: Extends the existing record instead of overwriting it
- * (default: false)
- *
- * @param {Object} record
- * @param {Object} options
- * @return {Promise}
- */
- update(record, options = { synced: false, patch: false }) {
- // Validate the record and its ID, even though this validation is
- // also done in the CollectionTransaction method, because we need
- // to pass the ID to preloadIds.
- if (typeof record !== "object") {
- return Promise.reject(new Error("Record is not an object."));
- }
- if (!Object.prototype.hasOwnProperty.call(record, "id")) {
- return Promise.reject(new Error("Cannot update a record missing id."));
- }
- if (!this.idSchema.validate(record.id)) {
- return Promise.reject(new Error(`Invalid Id: ${record.id}`));
- }
- return this.execute(txn => txn.update(record, options), {
- preloadIds: [record.id],
- });
- }
- /**
- * Like {@link CollectionTransaction#upsert}, but wrapped in its own transaction.
- *
- * @param {Object} record
- * @return {Promise}
- */
- upsert(record) {
- // Validate the record and its ID, even though this validation is
- // also done in the CollectionTransaction method, because we need
- // to pass the ID to preloadIds.
- if (typeof record !== "object") {
- return Promise.reject(new Error("Record is not an object."));
- }
- if (!Object.prototype.hasOwnProperty.call(record, "id")) {
- return Promise.reject(new Error("Cannot update a record missing id."));
- }
- if (!this.idSchema.validate(record.id)) {
- return Promise.reject(new Error(`Invalid Id: ${record.id}`));
- }
- return this.execute(txn => txn.upsert(record), { preloadIds: [record.id] });
- }
- /**
- * Like {@link CollectionTransaction#get}, but wrapped in its own transaction.
- *
- * Options:
- * - {Boolean} includeDeleted: Include virtually deleted records.
- *
- * @param {String} id
- * @param {Object} options
- * @return {Promise}
- */
- get(id, options = { includeDeleted: false }) {
- return this.execute(txn => txn.get(id, options), { preloadIds: [id] });
- }
- /**
- * Like {@link CollectionTransaction#getAny}, but wrapped in its own transaction.
- *
- * @param {String} id
- * @return {Promise}
- */
- getAny(id) {
- return this.execute(txn => txn.getAny(id), { preloadIds: [id] });
- }
- /**
- * Same as {@link Collection#delete}, but wrapped in its own transaction.
- *
- * Options:
- * - {Boolean} virtual: When set to `true`, doesn't actually delete the record,
- * update its `_status` attribute to `deleted` instead (default: true)
- *
- * @param {String} id The record's Id.
- * @param {Object} options The options object.
- * @return {Promise}
- */
- delete(id, options = { virtual: true }) {
- return this.execute(transaction => {
- return transaction.delete(id, options);
- }, { preloadIds: [id] });
- }
- /**
- * Same as {@link Collection#deleteAll}, but wrapped in its own transaction, execulding the parameter.
- *
- * @return {Promise}
- */
- async deleteAll() {
- const { data } = await this.list({}, { includeDeleted: false });
- const recordIds = data.map(record => record.id);
- return this.execute(transaction => {
- return transaction.deleteAll(recordIds);
- }, { preloadIds: recordIds });
- }
- /**
- * The same as {@link CollectionTransaction#deleteAny}, but wrapped
- * in its own transaction.
- *
- * @param {String} id The record's Id.
- * @return {Promise}
- */
- deleteAny(id) {
- return this.execute(txn => txn.deleteAny(id), { preloadIds: [id] });
- }
- /**
- * Lists records from the local database.
- *
- * Params:
- * - {Object} filters Filter the results (default: `{}`).
- * - {String} order The order to apply (default: `-last_modified`).
- *
- * Options:
- * - {Boolean} includeDeleted: Include virtually deleted records.
- *
- * @param {Object} params The filters and order to apply to the results.
- * @param {Object} options The options object.
- * @return {Promise}
- */
- async list(params = {}, options = { includeDeleted: false }) {
- params = Object.assign({ order: "-last_modified", filters: {} }, params);
- const results = await this.db.list(params);
- let data = results;
- if (!options.includeDeleted) {
- data = results.filter(record => record._status !== "deleted");
- }
- return { data, permissions: {} };
- }
- /**
- * Imports remote changes into the local database.
- * This method is in charge of detecting the conflicts, and resolve them
- * according to the specified strategy.
- * @param {SyncResultObject} syncResultObject The sync result object.
- * @param {Array} decodedChanges The list of changes to import in the local database.
- * @param {String} strategy The {@link Collection.strategy} (default: MANUAL)
- * @return {Promise}
- */
- async importChanges(syncResultObject, decodedChanges, strategy = Collection.strategy.MANUAL) {
- // Retrieve records matching change ids.
- try {
- for (let i = 0; i < decodedChanges.length; i += IMPORT_CHUNK_SIZE) {
- const slice = decodedChanges.slice(i, i + IMPORT_CHUNK_SIZE);
- const { imports, resolved } = await this.db.execute(transaction => {
- const imports = slice.map(remote => {
- // Store remote change into local database.
- return importChange(transaction, remote, this.localFields, strategy);
- });
- const conflicts = imports
- .filter(i => i.type === "conflicts")
- .map(i => i.data);
- const resolved = this._handleConflicts(transaction, conflicts, strategy);
- return { imports, resolved };
- }, { preload: slice.map(record => record.id) });
- // Lists of created/updated/deleted records
- imports.forEach(({ type, data }) => syncResultObject.add(type, data));
- // Automatically resolved conflicts (if not manual)
- if (resolved.length > 0) {
- syncResultObject.reset("conflicts").add("resolved", resolved);
- }
- }
- }
- catch (err) {
- const data = {
- type: "incoming",
- message: err.message,
- stack: err.stack,
- };
- // XXX one error of the whole transaction instead of per atomic op
- syncResultObject.add("errors", data);
- }
- return syncResultObject;
- }
- /**
- * Imports the responses of pushed changes into the local database.
- * Basically it stores the timestamp assigned by the server into the local
- * database.
- * @param {SyncResultObject} syncResultObject The sync result object.
- * @param {Array} toApplyLocally The list of changes to import in the local database.
- * @param {Array} conflicts The list of conflicts that have to be resolved.
- * @param {String} strategy The {@link Collection.strategy}.
- * @return {Promise}
- */
- async _applyPushedResults(syncResultObject, toApplyLocally, conflicts, strategy = Collection.strategy.MANUAL) {
- const toDeleteLocally = toApplyLocally.filter(r => r.deleted);
- const toUpdateLocally = toApplyLocally.filter(r => !r.deleted);
- const { published, resolved } = await this.db.execute(transaction => {
- const updated = toUpdateLocally.map(record => {
- const synced = markSynced(record);
- transaction.update(synced);
- return synced;
- });
- const deleted = toDeleteLocally.map(record => {
- transaction.delete(record.id);
- // Amend result data with the deleted attribute set
- return { id: record.id, deleted: true };
- });
- const published = updated.concat(deleted);
- // Handle conflicts, if any
- const resolved = this._handleConflicts(transaction, conflicts, strategy);
- return { published, resolved };
- });
- syncResultObject.add("published", published);
- if (resolved.length > 0) {
- syncResultObject
- .reset("conflicts")
- .reset("resolved")
- .add("resolved", resolved);
- }
- return syncResultObject;
- }
- /**
- * Handles synchronization conflicts according to specified strategy.
- *
- * @param {SyncResultObject} result The sync result object.
- * @param {String} strategy The {@link Collection.strategy}.
- * @return {Promise<Array<Object>>} The resolved conflicts, as an
- * array of {accepted, rejected} objects
- */
- _handleConflicts(transaction, conflicts, strategy) {
- if (strategy === Collection.strategy.MANUAL) {
- return [];
- }
- return conflicts.map(conflict => {
- const resolution = strategy === Collection.strategy.CLIENT_WINS
- ? conflict.local
- : conflict.remote;
- const rejected = strategy === Collection.strategy.CLIENT_WINS
- ? conflict.remote
- : conflict.local;
- let accepted, status, id;
- if (resolution === null) {
- // We "resolved" with the server-side deletion. Delete locally.
- // This only happens during SERVER_WINS because the local
- // version of a record can never be null.
- // We can get "null" from the remote side if we got a conflict
- // and there is no remote version available; see kinto-http.js
- // batch.js:aggregate.
- transaction.delete(conflict.local.id);
- accepted = null;
- // The record was deleted, but that status is "synced" with
- // the server, so we don't need to push the change.
- status = "synced";
- id = conflict.local.id;
- }
- else {
- const updated = this._resolveRaw(conflict, resolution);
- transaction.update(updated);
- accepted = updated;
- status = updated._status;
- id = updated.id;
- }
- return { rejected, accepted, id, _status: status };
- });
- }
- /**
- * Execute a bunch of operations in a transaction.
- *
- * This transaction should be atomic -- either all of its operations
- * will succeed, or none will.
- *
- * The argument to this function is itself a function which will be
- * called with a {@link CollectionTransaction}. Collection methods
- * are available on this transaction, but instead of returning
- * promises, they are synchronous. execute() returns a Promise whose
- * value will be the return value of the provided function.
- *
- * Most operations will require access to the record itself, which
- * must be preloaded by passing its ID in the preloadIds option.
- *
- * Options:
- * - {Array} preloadIds: list of IDs to fetch at the beginning of
- * the transaction
- *
- * @return {Promise} Resolves with the result of the given function
- * when the transaction commits.
- */
- execute(doOperations, { preloadIds = [] } = {}) {
- for (const id of preloadIds) {
- if (!this.idSchema.validate(id)) {
- return Promise.reject(Error(`Invalid Id: ${id}`));
- }
- }
- return this.db.execute(transaction => {
- const txn = new CollectionTransaction(this, transaction);
- const result = doOperations(txn);
- txn.emitEvents();
- return result;
- }, { preload: preloadIds });
- }
- /**
- * Resets the local records as if they were never synced; existing records are
- * marked as newly created, deleted records are dropped.
- *
- * A next call to {@link Collection.sync} will thus republish the whole
- * content of the local collection to the server.
- *
- * @return {Promise} Resolves with the number of processed records.
- */
- async resetSyncStatus() {
- const unsynced = await this.list({ filters: { _status: ["deleted", "synced"] }, order: "" }, { includeDeleted: true });
- await this.db.execute(transaction => {
- unsynced.data.forEach(record => {
- if (record._status === "deleted") {
- // Garbage collect deleted records.
- transaction.delete(record.id);
- }
- else {
- // Records that were synced become «created».
- transaction.update(Object.assign(Object.assign({}, record), { last_modified: undefined, _status: "created" }));
- }
- });
- });
- this._lastModified = null;
- await this.db.saveLastModified(null);
- return unsynced.data.length;
- }
- /**
- * Returns an object containing two lists:
- *
- * - `toDelete`: unsynced deleted records we can safely delete;
- * - `toSync`: local updates to send to the server.
- *
- * @return {Promise}
- */
- async gatherLocalChanges() {
- const unsynced = await this.list({
- filters: { _status: ["created", "updated"] },
- order: "",
- });
- const deleted = await this.list({ filters: { _status: "deleted" }, order: "" }, { includeDeleted: true });
- return await Promise.all(unsynced.data
- .concat(deleted.data)
- .map(this._encodeRecord.bind(this, "remote")));
- }
- /**
- * Fetch remote changes, import them to the local database, and handle
- * conflicts according to `options.strategy`. Then, updates the passed
- * {@link SyncResultObject} with import results.
- *
- * Options:
- * - {String} strategy: The selected sync strategy.
- * - {String} expectedTimestamp: A timestamp to use as a "cache busting" query parameter.
- * - {Array<String>} exclude: A list of record ids to exclude from pull.
- * - {Object} headers: The HTTP headers to use in the request.
- * - {int} retry: The number of retries to do if the HTTP request fails.
- * - {int} lastModified: The timestamp to use in `?_since` query.
- *
- * @param {KintoClient.Collection} client Kinto client Collection instance.
- * @param {SyncResultObject} syncResultObject The sync result object.
- * @param {Object} options The options object.
- * @return {Promise}
- */
- async pullChanges(client, syncResultObject, options = {}) {
- if (!syncResultObject.ok) {
- return syncResultObject;
- }
- const since = this.lastModified
- ? this.lastModified
- : await this.db.getLastModified();
- options = Object.assign({ strategy: Collection.strategy.MANUAL, lastModified: since, headers: {} }, options);
- // Optionally ignore some records when pulling for changes.
- // (avoid redownloading our own changes on last step of #sync())
- let filters;
- if (options.exclude) {
- // Limit the list of excluded records to the first 50 records in order
- // to remain under de-facto URL size limit (~2000 chars).
- // http://stackoverflow.com/questions/417142/what-is-the-maximum-length-of-a-url-in-different-browsers/417184#417184
- const exclude_id = options.exclude
- .slice(0, 50)
- .map(r => r.id)
- .join(",");
- filters = { exclude_id };
- }
- if (options.expectedTimestamp) {
- filters = Object.assign(Object.assign({}, filters), { _expected: options.expectedTimestamp });
- }
- // First fetch remote changes from the server
- const { data, last_modified } = await client.listRecords({
- // Since should be ETag (see https://github.com/Kinto/kinto.js/issues/356)
- since: options.lastModified ? `${options.lastModified}` : undefined,
- headers: options.headers,
- retry: options.retry,
- // Fetch every page by default (FIXME: option to limit pages, see #277)
- pages: Infinity,
- filters,
- });
- // last_modified is the ETag header value (string).
- // For retro-compatibility with first kinto.js versions
- // parse it to integer.
- const unquoted = last_modified ? parseInt(last_modified, 10) : undefined;
- // Check if server was flushed.
- // This is relevant for the Kinto demo server
- // (and thus for many new comers).
- const localSynced = options.lastModified;
- const serverChanged = unquoted > options.lastModified;
- const emptyCollection = data.length === 0;
- if (!options.exclude && localSynced && serverChanged && emptyCollection) {
- const e = new ServerWasFlushedError(localSynced, unquoted, "Server has been flushed. Client Side Timestamp: " +
- localSynced +
- " Server Side Timestamp: " +
- unquoted);
- throw e;
- }
- // Atomic updates are not sensible here because unquoted is not
- // computed as a function of syncResultObject.lastModified.
- // eslint-disable-next-line require-atomic-updates
- syncResultObject.lastModified = unquoted;
- // Decode incoming changes.
- const decodedChanges = await Promise.all(data.map(change => {
- return this._decodeRecord("remote", change);
- }));
- // Hook receives decoded records.
- const payload = { lastModified: unquoted, changes: decodedChanges };
- const afterHooks = await this.applyHook("incoming-changes", payload);
- // No change, nothing to import.
- if (afterHooks.changes.length > 0) {
- // Reflect these changes locally
- await this.importChanges(syncResultObject, afterHooks.changes, options.strategy);
- }
- return syncResultObject;
- }
- applyHook(hookName, payload) {
- if (typeof this.hooks[hookName] == "undefined") {
- return Promise.resolve(payload);
- }
- return waterfall(this.hooks[hookName].map(hook => {
- return record => {
- const result = hook(payload, this);
- const resultThenable = result && typeof result.then === "function";
- const resultChanges = result && Object.prototype.hasOwnProperty.call(result, "changes");
- if (!(resultThenable || resultChanges)) {
- throw new Error(`Invalid return value for hook: ${JSON.stringify(result)} has no 'then()' or 'changes' properties`);
- }
- return result;
- };
- }), payload);
- }
- /**
- * Publish local changes to the remote server and updates the passed
- * {@link SyncResultObject} with publication results.
- *
- * Options:
- * - {String} strategy: The selected sync strategy.
- * - {Object} headers: The HTTP headers to use in the request.
- * - {int} retry: The number of retries to do if the HTTP request fails.
- *
- * @param {KintoClient.Collection} client Kinto client Collection instance.
- * @param {SyncResultObject} syncResultObject The sync result object.
- * @param {Object} changes The change object.
- * @param {Array} changes.toDelete The list of records to delete.
- * @param {Array} changes.toSync The list of records to create/update.
- * @param {Object} options The options object.
- * @return {Promise}
- */
- async pushChanges(client, changes, syncResultObject, options = {}) {
- if (!syncResultObject.ok) {
- return syncResultObject;
- }
- const safe = !options.strategy || options.strategy !== Collection.CLIENT_WINS;
- const toDelete = changes.filter(r => r._status == "deleted");
- const toSync = changes.filter(r => r._status != "deleted");
- // Perform a batch request with every changes.
- const synced = await client.batch(batch => {
- toDelete.forEach(r => {
- // never published locally deleted records should not be pusblished
- if (r.last_modified) {
- batch.deleteRecord(r);
- }
- });
- toSync.forEach(r => {
- // Clean local fields (like _status) before sending to server.
- const published = this.cleanLocalFields(r);
- if (r._status === "created") {
- batch.createRecord(published);
- }
- else {
- batch.updateRecord(published);
- }
- });
- }, {
- headers: options.headers,
- retry: options.retry,
- safe,
- aggregate: true,
- });
- // Store outgoing errors into sync result object
- syncResultObject.add("errors", synced.errors.map(e => (Object.assign(Object.assign({}, e), { type: "outgoing" }))));
- // Store outgoing conflicts into sync result object
- const conflicts = [];
- for (const { type, local, remote } of synced.conflicts) {
- // Note: we ensure that local data are actually available, as they may
- // be missing in the case of a published deletion.
- const safeLocal = (local && local.data) || { id: remote.id };
- const realLocal = await this._decodeRecord("remote", safeLocal);
- // We can get "null" from the remote side if we got a conflict
- // and there is no remote version available; see kinto-http.js
- // batch.js:aggregate.
- const realRemote = remote && (await this._decodeRecord("remote", remote));
- const conflict = { type, local: realLocal, remote: realRemote };
- conflicts.push(conflict);
- }
- syncResultObject.add("conflicts", conflicts);
- // Records that must be deleted are either deletions that were pushed
- // to server (published) or deleted records that were never pushed (skipped).
- const missingRemotely = synced.skipped.map(r => (Object.assign(Object.assign({}, r), { deleted: true })));
- // For created and updated records, the last_modified coming from server
- // will be stored locally.
- // Reflect publication results locally using the response from
- // the batch request.
- const published = synced.published.map(c => c.data);
- const toApplyLocally = published.concat(missingRemotely);
- // Apply the decode transformers, if any
- const decoded = await Promise.all(toApplyLocally.map(record => {
- return this._decodeRecord("remote", record);
- }));
- // We have to update the local records with the responses of the server
- // (eg. last_modified values etc.).
- if (decoded.length > 0 || conflicts.length > 0) {
- await this._applyPushedResults(syncResultObject, decoded, conflicts, options.strategy);
- }
- return syncResultObject;
- }
- /**
- * Return a copy of the specified record without the local fields.
- *
- * @param {Object} record A record with potential local fields.
- * @return {Object}
- */
- cleanLocalFields(record) {
- const localKeys = RECORD_FIELDS_TO_CLEAN.concat(this.localFields);
- return omitKeys(record, localKeys);
- }
- /**
- * Resolves a conflict, updating local record according to proposed
- * resolution — keeping remote record `last_modified` value as a reference for
- * further batch sending.
- *
- * @param {Object} conflict The conflict object.
- * @param {Object} resolution The proposed record.
- * @return {Promise}
- */
- resolve(conflict, resolution) {
- return this.db.execute(transaction => {
- const updated = this._resolveRaw(conflict, resolution);
- transaction.update(updated);
- return { data: updated, permissions: {} };
- });
- }
- /**
- * @private
- */
- _resolveRaw(conflict, resolution) {
- const resolved = Object.assign(Object.assign({}, resolution), {
- // Ensure local record has the latest authoritative timestamp
- last_modified: conflict.remote && conflict.remote.last_modified });
- // If the resolution object is strictly equal to the
- // remote record, then we can mark it as synced locally.
- // Otherwise, mark it as updated (so that the resolution is pushed).
- const synced = deepEqual(resolved, conflict.remote);
- return markStatus(resolved, synced ? "synced" : "updated");
- }
- /**
- * Synchronize remote and local data. The promise will resolve with a
- * {@link SyncResultObject}, though will reject:
- *
- * - if the server is currently backed off;
- * - if the server has been detected flushed.
- *
- * Options:
- * - {Object} headers: HTTP headers to attach to outgoing requests.
- * - {String} expectedTimestamp: A timestamp to use as a "cache busting" query parameter.
- * - {Number} retry: Number of retries when server fails to process the request (default: 1).
- * - {Collection.strategy} strategy: See {@link Collection.strategy}.
- * - {Boolean} ignoreBackoff: Force synchronization even if server is currently
- * backed off.
- * - {String} bucket: The remove bucket id to use (default: null)
- * - {String} collection: The remove collection id to use (default: null)
- * - {String} remote The remote Kinto server endpoint to use (default: null).
- *
- * @param {Object} options Options.
- * @return {Promise}
- * @throws {Error} If an invalid remote option is passed.
- */
- async sync(options = {
- strategy: Collection.strategy.MANUAL,
- headers: {},
- retry: 1,
- ignoreBackoff: false,
- bucket: null,
- collection: null,
- remote: null,
- expectedTimestamp: null,
- }) {
- options = Object.assign(Object.assign({}, options), { bucket: options.bucket || this.bucket, collection: options.collection || this.name });
- const previousRemote = this.api.remote;
- if (options.remote) {
- // Note: setting the remote ensures it's valid, throws when invalid.
- this.api.remote = options.remote;
- }
- if (!options.ignoreBackoff && this.api.backoff > 0) {
- const seconds = Math.ceil(this.api.backoff / 1000);
- return Promise.reject(new Error(`Server is asking clients to back off; retry in ${seconds}s or use the ignoreBackoff option.`));
- }
- const client = this.api
- .bucket(options.bucket)
- .collection(options.collection);
- const result = new SyncResultObject();
- try {
- // Fetch collection metadata.
- await this.pullMetadata(client, options);
- // Fetch last changes from the server.
- await this.pullChanges(client, result, options);
- const { lastModified } = result;
- if (options.strategy != Collection.strategy.PULL_ONLY) {
- // Fetch local changes
- const toSync = await this.gatherLocalChanges();
- // Publish local changes and pull local resolutions
- await this.pushChanges(client, toSync, result, options);
- // Publish local resolution of push conflicts to server (on CLIENT_WINS)
- const resolvedUnsynced = result.resolved.filter(r => r._status !== "synced");
- if (resolvedUnsynced.length > 0) {
- const resolvedEncoded = await Promise.all(resolvedUnsynced.map(resolution => {
- let record = resolution.accepted;
- if (record === null) {
- record = { id: resolution.id, _status: resolution._status };
- }
- return this._encodeRecord("remote", record);
- }));
- await this.pushChanges(client, resolvedEncoded, result, options);
- }
- // Perform a last pull to catch changes that occured after the last pull,
- // while local changes were pushed. Do not do it nothing was pushed.
- if (result.published.length > 0) {
- // Avoid redownloading our own changes during the last pull.
- const pullOpts = Object.assign(Object.assign({}, options), { lastModified, exclude: result.published });
- await this.pullChanges(client, result, pullOpts);
- }
- }
- // Don't persist lastModified value if any conflict or error occured
- if (result.ok) {
- // No conflict occured, persist collection's lastModified value
- this._lastModified = await this.db.saveLastModified(result.lastModified);
- }
- }
- catch (e) {
- this.events.emit("sync:error", Object.assign(Object.assign({}, options), { error: e }));
- throw e;
- }
- finally {
- // Ensure API default remote is reverted if a custom one's been used
- this.api.remote = previousRemote;
- }
- this.events.emit("sync:success", Object.assign(Object.assign({}, options), { result }));
- return result;
- }
- /**
- * Load a list of records already synced with the remote server.
- *
- * The local records which are unsynced or whose timestamp is either missing
- * or superior to those being loaded will be ignored.
- *
- * @deprecated Use {@link importBulk} instead.
- * @param {Array} records The previously exported list of records to load.
- * @return {Promise} with the effectively imported records.
- */
- async loadDump(records) {
- return this.importBulk(records);
- }
- /**
- * Load a list of records already synced with the remote server.
- *
- * The local records which are unsynced or whose timestamp is either missing
- * or superior to those being loaded will be ignored.
- *
- * @param {Array} records The previously exported list of records to load.
- * @return {Promise} with the effectively imported records.
- */
- async importBulk(records) {
- if (!Array.isArray(records)) {
- throw new Error("Records is not an array.");
- }
- for (const record of records) {
- if (!Object.prototype.hasOwnProperty.call(record, "id") ||
- !this.idSchema.validate(record.id)) {
- throw new Error("Record has invalid ID: " + JSON.stringify(record));
- }
- if (!record.last_modified) {
- throw new Error("Record has no last_modified value: " + JSON.stringify(record));
- }
- }
- // Fetch all existing records from local database,
- // and skip those who are newer or not marked as synced.
- // XXX filter by status / ids in records
- const { data } = await this.list({}, { includeDeleted: true });
- const existingById = data.reduce((acc, record) => {
- acc[record.id] = record;
- return acc;
- }, {});
- const newRecords = records.filter(record => {
- const localRecord = existingById[record.id];
- const shouldKeep =
- // No local record with this id.
- localRecord === undefined ||
- // Or local record is synced
- (localRecord._status === "synced" &&
- // And was synced from server
- localRecord.last_modified !== undefined &&
- // And is older than imported one.
- record.last_modified > localRecord.last_modified);
- return shouldKeep;
- });
- return await this.db.importBulk(newRecords.map(markSynced));
- }
- async pullMetadata(client, options = {}) {
- const { expectedTimestamp, headers } = options;
- const query = expectedTimestamp
- ? { query: { _expected: expectedTimestamp } }
- : undefined;
- const metadata = await client.getData(Object.assign(Object.assign({}, query), { headers }));
- return this.db.saveMetadata(metadata);
- }
- async metadata() {
- return this.db.getMetadata();
- }
- }
- /**
- * A Collection-oriented wrapper for an adapter's transaction.
- *
- * This defines the high-level functions available on a collection.
- * The collection itself offers functions of the same name. These will
- * perform just one operation in its own transaction.
- */
- class CollectionTransaction {
- constructor(collection, adapterTransaction) {
- this.collection = collection;
- this.adapterTransaction = adapterTransaction;
- this._events = [];
- }
- _queueEvent(action, payload) {
- this._events.push({ action, payload });
- }
- /**
- * Emit queued events, to be called once every transaction operations have
- * been executed successfully.
- */
- emitEvents() {
- for (const { action, payload } of this._events) {
- this.collection.events.emit(action, payload);
- }
- if (this._events.length > 0) {
- const targets = this._events.map(({ action, payload }) => (Object.assign({ action }, payload)));
- this.collection.events.emit("change", { targets });
- }
- this._events = [];
- }
- /**
- * Retrieve a record by its id from the local database, or
- * undefined if none exists.
- *
- * This will also return virtually deleted records.
- *
- * @param {String} id
- * @return {Object}
- */
- getAny(id) {
- const record = this.adapterTransaction.get(id);
- return { data: record, permissions: {} };
- }
- /**
- * Retrieve a record by its id from the local database.
- *
- * Options:
- * - {Boolean} includeDeleted: Include virtually deleted records.
- *
- * @param {String} id
- * @param {Object} options
- * @return {Object}
- */
- get(id, options = { includeDeleted: false }) {
- const res = this.getAny(id);
- if (!res.data ||
- (!options.includeDeleted && res.data._status === "deleted")) {
- throw new Error(`Record with id=${id} not found.`);
- }
- return res;
- }
- /**
- * Deletes a record from the local database.
- *
- * Options:
- * - {Boolean} virtual: When set to `true`, doesn't actually delete the record,
- * update its `_status` attribute to `deleted` instead (default: true)
- *
- * @param {String} id The record's Id.
- * @param {Object} options The options object.
- * @return {Object}
- */
- delete(id, options = { virtual: true }) {
- // Ensure the record actually exists.
- const existing = this.adapterTransaction.get(id);
- const alreadyDeleted = existing && existing._status == "deleted";
- if (!existing || (alreadyDeleted && options.virtual)) {
- throw new Error(`Record with id=${id} not found.`);
- }
- // Virtual updates status.
- if (options.virtual) {
- this.adapterTransaction.update(markDeleted(existing));
- }
- else {
- // Delete for real.
- this.adapterTransaction.delete(id);
- }
- this._queueEvent("delete", { data: existing });
- return { data: existing, permissions: {} };
- }
- /**
- * Soft delete all records from the local database.
- *
- * @param {Array} ids Array of non-deleted Record Ids.
- * @return {Object}
- */
- deleteAll(ids) {
- const existingRecords = [];
- ids.forEach(id => {
- existingRecords.push(this.adapterTransaction.get(id));
- this.delete(id);
- });
- this._queueEvent("deleteAll", { data: existingRecords });
- return { data: existingRecords, permissions: {} };
- }
- /**
- * Deletes a record from the local database, if any exists.
- * Otherwise, do nothing.
- *
- * @param {String} id The record's Id.
- * @return {Object}
- */
- deleteAny(id) {
- const existing = this.adapterTransaction.get(id);
- if (existing) {
- this.adapterTransaction.update(markDeleted(existing));
- this._queueEvent("delete", { data: existing });
- }
- return { data: Object.assign({ id }, existing), deleted: !!existing, permissions: {} };
- }
- /**
- * Adds a record to the local database, asserting that none
- * already exist with this ID.
- *
- * @param {Object} record, which must contain an ID
- * @return {Object}
- */
- create(record) {
- if (typeof record !== "object") {
- throw new Error("Record is not an object.");
- }
- if (!Object.prototype.hasOwnProperty.call(record, "id")) {
- throw new Error("Cannot create a record missing id");
- }
- if (!this.collection.idSchema.validate(record.id)) {
- throw new Error(`Invalid Id: ${record.id}`);
- }
- this.adapterTransaction.create(record);
- this._queueEvent("create", { data: record });
- return { data: record, permissions: {} };
- }
- /**
- * Updates a record from the local database.
- *
- * Options:
- * - {Boolean} synced: Sets record status to "synced" (default: false)
- * - {Boolean} patch: Extends the existing record instead of overwriting it
- * (default: false)
- *
- * @param {Object} record
- * @param {Object} options
- * @return {Object}
- */
- update(record, options = { synced: false, patch: false }) {
- if (typeof record !== "object") {
- throw new Error("Record is not an object.");
- }
- if (!Object.prototype.hasOwnProperty.call(record, "id")) {
- throw new Error("Cannot update a record missing id.");
- }
- if (!this.collection.idSchema.validate(record.id)) {
- throw new Error(`Invalid Id: ${record.id}`);
- }
- const oldRecord = this.adapterTransaction.get(record.id);
- if (!oldRecord) {
- throw new Error(`Record with id=${record.id} not found.`);
- }
- const newRecord = options.patch ? Object.assign(Object.assign({}, oldRecord), record) : record;
- const updated = this._updateRaw(oldRecord, newRecord, options);
- this.adapterTransaction.update(updated);
- this._queueEvent("update", { data: updated, oldRecord });
- return { data: updated, oldRecord, permissions: {} };
- }
- /**
- * Lower-level primitive for updating a record while respecting
- * _status and last_modified.
- *
- * @param {Object} oldRecord: the record retrieved from the DB
- * @param {Object} newRecord: the record to replace it with
- * @return {Object}
- */
- _updateRaw(oldRecord, newRecord, { synced = false } = {}) {
- const updated = Object.assign({}, newRecord);
- // Make sure to never loose the existing timestamp.
- if (oldRecord && oldRecord.last_modified && !updated.last_modified) {
- updated.last_modified = oldRecord.last_modified;
- }
- // If only local fields have changed, then keep record as synced.
- // If status is created, keep record as created.
- // If status is deleted, mark as updated.
- const isIdentical = oldRecord &&
- recordsEqual(oldRecord, updated, this.collection.localFields);
- const keepSynced = isIdentical && oldRecord._status == "synced";
- const neverSynced = !oldRecord || (oldRecord && oldRecord._status == "created");
- const newStatus = keepSynced || synced ? "synced" : neverSynced ? "created" : "updated";
- return markStatus(updated, newStatus);
- }
- /**
- * Upsert a record into the local database.
- *
- * This record must have an ID.
- *
- * If a record with this ID already exists, it will be replaced.
- * Otherwise, this record will be inserted.
- *
- * @param {Object} record
- * @return {Object}
- */
- upsert(record) {
- if (typeof record !== "object") {
- throw new Error("Record is not an object.");
- }
- if (!Object.prototype.hasOwnProperty.call(record, "id")) {
- throw new Error("Cannot update a record missing id.");
- }
- if (!this.collection.idSchema.validate(record.id)) {
- throw new Error(`Invalid Id: ${record.id}`);
- }
- let oldRecord = this.adapterTransaction.get(record.id);
- const updated = this._updateRaw(oldRecord, record);
- this.adapterTransaction.update(updated);
- // Don't return deleted records -- pretend they are gone
- if (oldRecord && oldRecord._status == "deleted") {
- oldRecord = undefined;
- }
- if (oldRecord) {
- this._queueEvent("update", { data: updated, oldRecord });
- }
- else {
- this._queueEvent("create", { data: updated });
- }
- return { data: updated, oldRecord, permissions: {} };
- }
- }
-
- const DEFAULT_BUCKET_NAME = "default";
- const DEFAULT_REMOTE = "http://localhost:8888/v1";
- const DEFAULT_RETRY = 1;
- /**
- * KintoBase class.
- */
- class KintoBase {
- /**
- * Provides a public access to the base adapter class. Users can create a
- * custom DB adapter by extending {@link BaseAdapter}.
- *
- * @type {Object}
- */
- static get adapters() {
- return {
- BaseAdapter: BaseAdapter,
- };
- }
- /**
- * Synchronization strategies. Available strategies are:
- *
- * - `MANUAL`: Conflicts will be reported in a dedicated array.
- * - `SERVER_WINS`: Conflicts are resolved using remote data.
- * - `CLIENT_WINS`: Conflicts are resolved using local data.
- *
- * @type {Object}
- */
- static get syncStrategy() {
- return Collection.strategy;
- }
- /**
- * Constructor.
- *
- * Options:
- * - `{String}` `remote` The server URL to use.
- * - `{String}` `bucket` The collection bucket name.
- * - `{EventEmitter}` `events` Events handler.
- * - `{BaseAdapter}` `adapter` The base DB adapter class.
- * - `{Object}` `adapterOptions` Options given to the adapter.
- * - `{Object}` `headers` The HTTP headers to use.
- * - `{Object}` `retry` Number of retries when the server fails to process the request (default: `1`)
- * - `{String}` `requestMode` The HTTP CORS mode to use.
- * - `{Number}` `timeout` The requests timeout in ms (default: `5000`).
- *
- * @param {Object} options The options object.
- */
- constructor(options = {}) {
- const defaults = {
- bucket: DEFAULT_BUCKET_NAME,
- remote: DEFAULT_REMOTE,
- retry: DEFAULT_RETRY,
- };
- this._options = Object.assign(Object.assign({}, defaults), options);
- if (!this._options.adapter) {
- throw new Error("No adapter provided");
- }
- this._api = null;
- /**
- * The event emitter instance.
- * @type {EventEmitter}
- */
- this.events = this._options.events;
- }
- /**
- * The kinto HTTP client instance.
- * @type {KintoClient}
- */
- get api() {
- const { events, headers, remote, requestMode, retry, timeout, } = this._options;
- if (!this._api) {
- this._api = new this.ApiClass(remote, {
- events,
- headers,
- requestMode,
- retry,
- timeout,
- });
- }
- return this._api;
- }
- /**
- * Creates a {@link Collection} instance. The second (optional) parameter
- * will set collection-level options like e.g. `remoteTransformers`.
- *
- * @param {String} collName The collection name.
- * @param {Object} [options={}] Extra options or override client's options.
- * @param {Object} [options.idSchema] IdSchema instance (default: UUID)
- * @param {Object} [options.remoteTransformers] Array<RemoteTransformer> (default: `[]`])
- * @param {Object} [options.hooks] Array<Hook> (default: `[]`])
- * @param {Object} [options.localFields] Array<Field> (default: `[]`])
- * @return {Collection}
- */
- collection(collName, options = {}) {
- if (!collName) {
- throw new Error("missing collection name");
- }
- const { bucket, events, adapter, adapterOptions } = Object.assign(Object.assign({}, this._options), options);
- const { idSchema, remoteTransformers, hooks, localFields } = options;
- return new Collection(bucket, collName, this, {
- events,
- adapter,
- adapterOptions,
- idSchema,
- remoteTransformers,
- hooks,
- localFields,
- });
- }
- }
-
- /*
- *
- * 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.
- */
- const { setTimeout, clearTimeout } = ChromeUtils.importESModule("resource://gre/modules/Timer.sys.mjs");
- const { XPCOMUtils } = ChromeUtils.importESModule("resource://gre/modules/XPCOMUtils.sys.mjs");
- XPCOMUtils.defineLazyGlobalGetters(global, ["fetch", "indexedDB"]);
- ChromeUtils.defineESModuleGetters(global, {
- EventEmitter: "resource://gre/modules/EventEmitter.sys.mjs",
- // Use standalone kinto-http module landed in FFx.
- KintoHttpClient: "resource://services-common/kinto-http-client.sys.mjs"
- });
- ChromeUtils.defineLazyGetter(global, "generateUUID", () => {
- const { generateUUID } = Cc["@mozilla.org/uuid-generator;1"].getService(Ci.nsIUUIDGenerator);
- return generateUUID;
- });
- class Kinto extends KintoBase {
- static get adapters() {
- return {
- BaseAdapter,
- IDB,
- };
- }
- get ApiClass() {
- return KintoHttpClient;
- }
- constructor(options = {}) {
- const events = {};
- EventEmitter.decorate(events);
- const defaults = {
- adapter: IDB,
- events,
- };
- super(Object.assign(Object.assign({}, defaults), options));
- }
- collection(collName, options = {}) {
- const idSchema = {
- validate(id) {
- return typeof id == "string" && RE_RECORD_ID.test(id);
- },
- generate() {
- return generateUUID()
- .toString()
- .replace(/[{}]/g, "");
- },
- };
- return super.collection(collName, Object.assign({ idSchema }, options));
- }
- }
-
- return Kinto;
-
-})));
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 19:32:16 +0000