mirror of
https://github.com/laurent22/joplin.git
synced 2024-12-21 09:38:01 +02:00
684 lines
26 KiB
JavaScript
684 lines
26 KiB
JavaScript
const BaseItem = require('lib/models/BaseItem.js');
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const Folder = require('lib/models/Folder.js');
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const Note = require('lib/models/Note.js');
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const Resource = require('lib/models/Resource.js');
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const MasterKey = require('lib/models/MasterKey.js');
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const BaseModel = require('lib/BaseModel.js');
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const DecryptionWorker = require('lib/services/DecryptionWorker');
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const { sprintf } = require('sprintf-js');
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const { time } = require('lib/time-utils.js');
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const { Logger } = require('lib/logger.js');
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const { _ } = require('lib/locale.js');
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const { shim } = require('lib/shim.js');
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const JoplinError = require('lib/JoplinError');
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class Synchronizer {
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constructor(db, api, appType) {
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this.state_ = 'idle';
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this.db_ = db;
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this.api_ = api;
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this.syncDirName_ = '.sync';
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this.resourceDirName_ = '.resource';
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this.logger_ = new Logger();
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this.appType_ = appType;
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this.cancelling_ = false;
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this.autoStartDecryptionWorker_ = true;
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// Debug flags are used to test certain hard-to-test conditions
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// such as cancelling in the middle of a loop.
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this.testingHooks_ = [];
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this.onProgress_ = function(s) {};
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this.progressReport_ = {};
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this.dispatch = function(action) {};
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}
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state() {
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return this.state_;
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}
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db() {
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return this.db_;
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}
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api() {
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return this.api_;
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}
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setLogger(l) {
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this.logger_ = l;
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}
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logger() {
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return this.logger_;
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}
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setEncryptionService(v) {
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this.encryptionService_ = v;
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}
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encryptionService(v) {
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return this.encryptionService_;
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}
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static reportToLines(report) {
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let lines = [];
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if (report.createLocal) lines.push(_("Created local items: %d.", report.createLocal));
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if (report.updateLocal) lines.push(_("Updated local items: %d.", report.updateLocal));
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if (report.createRemote) lines.push(_("Created remote items: %d.", report.createRemote));
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if (report.updateRemote) lines.push(_("Updated remote items: %d.", report.updateRemote));
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if (report.deleteLocal) lines.push(_("Deleted local items: %d.", report.deleteLocal));
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if (report.deleteRemote) lines.push(_("Deleted remote items: %d.", report.deleteRemote));
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if (report.fetchingTotal && report.fetchingProcessed) lines.push(_("Fetched items: %d/%d.", report.fetchingProcessed, report.fetchingTotal));
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if (!report.completedTime && report.state) lines.push(_('State: %s.', Synchronizer.stateToLabel(report.state)));
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if (report.cancelling && !report.completedTime) lines.push(_("Cancelling..."));
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if (report.completedTime) lines.push(_("Completed: %s", time.formatMsToLocal(report.completedTime)));
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if (report.errors && report.errors.length) lines.push(_("Last error: %s", report.errors[report.errors.length - 1].toString().substr(0, 500)));
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return lines;
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}
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logSyncOperation(action, local = null, remote = null, message = null, actionCount = 1) {
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let line = ['Sync'];
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line.push(action);
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if (message) line.push(message);
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let type = local && local.type_ ? local.type_ : null;
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if (!type) type = remote && remote.type_ ? remote.type_ : null;
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if (type) line.push(BaseItem.modelTypeToClassName(type));
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if (local) {
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let s = [];
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s.push(local.id);
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line.push('(Local ' + s.join(', ') + ')');
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}
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if (remote) {
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let s = [];
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s.push(remote.id ? remote.id : remote.path);
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line.push('(Remote ' + s.join(', ') + ')');
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}
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this.logger().debug(line.join(': '));
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if (!this.progressReport_[action]) this.progressReport_[action] = 0;
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this.progressReport_[action] += actionCount;
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this.progressReport_.state = this.state();
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this.onProgress_(this.progressReport_);
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this.dispatch({ type: 'SYNC_REPORT_UPDATE', report: Object.assign({}, this.progressReport_) });
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}
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async logSyncSummary(report) {
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this.logger().info('Operations completed: ');
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for (let n in report) {
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if (!report.hasOwnProperty(n)) continue;
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if (n == 'errors') continue;
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if (n == 'starting') continue;
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if (n == 'finished') continue;
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if (n == 'state') continue;
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if (n == 'completedTime') continue;
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this.logger().info(n + ': ' + (report[n] ? report[n] : '-'));
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}
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let folderCount = await Folder.count();
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let noteCount = await Note.count();
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let resourceCount = await Resource.count();
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this.logger().info('Total folders: ' + folderCount);
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this.logger().info('Total notes: ' + noteCount);
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this.logger().info('Total resources: ' + resourceCount);
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if (report.errors && report.errors.length) {
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this.logger().warn('There was some errors:');
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for (let i = 0; i < report.errors.length; i++) {
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let e = report.errors[i];
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this.logger().warn(e);
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}
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}
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}
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async cancel() {
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if (this.cancelling_ || this.state() == 'idle') return;
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this.logSyncOperation('cancelling', null, null, '');
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this.cancelling_ = true;
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return new Promise((resolve, reject) => {
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const iid = setInterval(() => {
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if (this.state() == 'idle') {
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clearInterval(iid);
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resolve();
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}
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}, 100);
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});
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}
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cancelling() {
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return this.cancelling_;
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}
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static stateToLabel(state) {
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if (state === "idle") return _("Idle");
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if (state === "in_progress") return _("In progress");
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return state;
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}
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// Synchronisation is done in three major steps:
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//
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// 1. UPLOAD: Send to the sync target the items that have changed since the last sync.
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// 2. DELETE_REMOTE: Delete on the sync target, the items that have been deleted locally.
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// 3. DELTA: Find on the sync target the items that have been modified or deleted and apply the changes locally.
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async start(options = null) {
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if (!options) options = {};
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if (this.state() != 'idle') {
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let error = new Error(_('Synchronisation is already in progress. State: %s', this.state()));
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error.code = 'alreadyStarted';
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throw error;
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}
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this.state_ = 'in_progress';
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this.onProgress_ = options.onProgress ? options.onProgress : function(o) {};
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this.progressReport_ = { errors: [] };
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const lastContext = options.context ? options.context : {};
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const syncSteps = options.syncSteps ? options.syncSteps : ["update_remote", "delete_remote", "delta"];
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const syncTargetId = this.api().syncTargetId();
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this.cancelling_ = false;
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const masterKeysBefore = await MasterKey.count();
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let hasAutoEnabledEncryption = false;
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let synchronizationId = time.unixMs().toString();
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let outputContext = Object.assign({}, lastContext);
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this.dispatch({ type: 'SYNC_STARTED' });
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this.logSyncOperation('starting', null, null, 'Starting synchronisation to target ' + syncTargetId + '... [' + synchronizationId + ']');
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try {
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await this.api().mkdir(this.syncDirName_);
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this.api().setTempDirName(this.syncDirName_);
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await this.api().mkdir(this.resourceDirName_);
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// ========================================================================
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// 1. UPLOAD
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// ------------------------------------------------------------------------
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// First, find all the items that have been changed since the
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// last sync and apply the changes to remote.
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// ========================================================================
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if (syncSteps.indexOf("update_remote") >= 0) {
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let donePaths = [];
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while (true) {
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if (this.cancelling()) break;
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let result = await BaseItem.itemsThatNeedSync(syncTargetId);
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let locals = result.items;
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for (let i = 0; i < locals.length; i++) {
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if (this.cancelling()) break;
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let local = locals[i];
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let ItemClass = BaseItem.itemClass(local);
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let path = BaseItem.systemPath(local);
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// Safety check to avoid infinite loops.
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// In fact this error is possible if the item is marked for sync (via sync_time or force_sync) while synchronisation is in
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// progress. In that case exit anyway to be sure we aren't in a loop and the item will be re-synced next time.
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if (donePaths.indexOf(path) > 0) throw new Error(sprintf("Processing a path that has already been done: %s. sync_time was not updated?", path));
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let remote = await this.api().stat(path);
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let action = null;
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let updateSyncTimeOnly = true;
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let reason = "";
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let remoteContent = null;
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if (!remote) {
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if (!local.sync_time) {
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action = "createRemote";
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reason = "remote does not exist, and local is new and has never been synced";
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} else {
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// Note or item was modified after having been deleted remotely
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// "itemConflict" if for all the items except the notes, which are dealt with in a special way
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action = local.type_ == BaseModel.TYPE_NOTE ? "noteConflict" : "itemConflict";
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reason = "remote has been deleted, but local has changes";
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}
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} else {
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// Note: in order to know the real updated_time value, we need to load the content. In theory we could
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// rely on the file timestamp (in remote.updated_time) but in practice it's not accurate enough and
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// can lead to conflicts (for example when the file timestamp is slightly ahead of it's real
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// updated_time). updated_time is set and managed by clients so it's always accurate.
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// Same situation below for updateLocal.
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//
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// This is a bit inefficient because if the resulting action is "updateRemote" we don't need the whole
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// content, but for now that will do since being reliable is the priority.
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//
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// TODO: assuming a particular sync target is guaranteed to have accurate timestamps, the driver maybe
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// could expose this with a accurateTimestamps() method that returns "true". In that case, the test
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// could be done using the file timestamp and the potentially unnecessary content loading could be skipped.
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// OneDrive does not appear to have accurate timestamps as lastModifiedDateTime would occasionally be
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// a few seconds ahead of what it was set with setTimestamp()
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try {
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remoteContent = await this.api().get(path);
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} catch (error) {
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if (error.code === 'rejectedByTarget') {
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this.progressReport_.errors.push(error);
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this.logger().warn('Rejected by target: ' + path + ': ' + error.message);
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continue;
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} else {
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throw error;
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}
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}
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if (!remoteContent) throw new Error("Got metadata for path but could not fetch content: " + path);
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remoteContent = await BaseItem.unserialize(remoteContent);
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if (remoteContent.updated_time > local.sync_time) {
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// Since, in this loop, we are only dealing with items that require sync, if the
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// remote has been modified after the sync time, it means both items have been
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// modified and so there's a conflict.
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action = local.type_ == BaseModel.TYPE_NOTE ? "noteConflict" : "itemConflict";
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reason = "both remote and local have changes";
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} else {
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action = "updateRemote";
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reason = "local has changes";
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}
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}
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this.logSyncOperation(action, local, remote, reason);
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const handleCannotSyncItem = async (syncTargetId, item, cannotSyncReason) => {
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await ItemClass.saveSyncDisabled(syncTargetId, item, cannotSyncReason);
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this.dispatch({ type: "SYNC_HAS_DISABLED_SYNC_ITEMS" });
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};
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if (local.type_ == BaseModel.TYPE_RESOURCE && (action == "createRemote" || action === "updateRemote" || (action == "itemConflict" && remote))) {
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try {
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const remoteContentPath = this.resourceDirName_ + "/" + local.id;
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const result = await Resource.fullPathForSyncUpload(local);
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local = result.resource;
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const localResourceContentPath = result.path;
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await this.api().put(remoteContentPath, null, { path: localResourceContentPath, source: "file" });
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} catch (error) {
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if (error && ["rejectedByTarget", "fileNotFound"].indexOf(error.code) >= 0) {
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await handleCannotSyncItem(syncTargetId, local, error.message);
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action = null;
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} else {
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throw error;
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}
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}
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}
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if (action == "createRemote" || action == "updateRemote") {
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let canSync = true;
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try {
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if (this.testingHooks_.indexOf("rejectedByTarget") >= 0) throw new JoplinError("Testing rejectedByTarget", "rejectedByTarget");
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const content = await ItemClass.serializeForSync(local);
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await this.api().put(path, content);
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} catch (error) {
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if (error && error.code === "rejectedByTarget") {
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await handleCannotSyncItem(syncTargetId, local, error.message);
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canSync = false;
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} else {
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throw error;
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}
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}
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// Note: Currently, we set sync_time to update_time, which should work fine given that the resolution is the millisecond.
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// In theory though, this could happen:
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//
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// 1. t0: Editor: Note is modified
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// 2. t0: Sync: Found that note was modified so start uploading it
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// 3. t0: Editor: Note is modified again
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// 4. t1: Sync: Note has finished uploading, set sync_time to t0
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//
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// Later any attempt to sync will not detect that note was modified in (3) (within the same millisecond as it was being uploaded)
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// because sync_time will be t0 too.
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//
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// The solution would be to use something like an etag (a simple counter incremented on every change) to make sure each
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// change is uniquely identified. Leaving it like this for now.
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if (canSync) {
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// 2018-01-21: Setting timestamp is not needed because the delta() logic doesn't rely
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// on it (instead it uses a more reliable `context` object) and the itemsThatNeedSync loop
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// above also doesn't use it because it fetches the whole remote object and read the
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// more reliable 'updated_time' property. Basically remote.updated_time is deprecated.
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// await this.api().setTimestamp(path, local.updated_time);
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await ItemClass.saveSyncTime(syncTargetId, local, local.updated_time);
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}
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} else if (action == "itemConflict") {
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// ------------------------------------------------------------------------------
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// For non-note conflicts, we take the remote version (i.e. the version that was
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// synced first) and overwrite the local content.
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// ------------------------------------------------------------------------------
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if (remote) {
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local = remoteContent;
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const syncTimeQueries = BaseItem.updateSyncTimeQueries(syncTargetId, local, time.unixMs());
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await ItemClass.save(local, { autoTimestamp: false, nextQueries: syncTimeQueries });
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} else {
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await ItemClass.delete(local.id);
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}
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} else if (action == "noteConflict") {
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// ------------------------------------------------------------------------------
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// First find out if the conflict matters. For example, if the conflict is on the title or body
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// we want to preserve all the changes. If it's on todo_completed it doesn't really matter
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// so in this case we just take the remote content.
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// ------------------------------------------------------------------------------
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let mustHandleConflict = true;
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if (remoteContent) {
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mustHandleConflict = Note.mustHandleConflict(local, remoteContent);
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}
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// ------------------------------------------------------------------------------
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// Create a duplicate of local note into Conflicts folder
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// (to preserve the user's changes)
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// ------------------------------------------------------------------------------
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if (mustHandleConflict) {
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let conflictedNote = Object.assign({}, local);
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delete conflictedNote.id;
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conflictedNote.is_conflict = 1;
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await Note.save(conflictedNote, { autoTimestamp: false });
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}
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// ------------------------------------------------------------------------------
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// Either copy the remote content to local or, if the remote content has
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// been deleted, delete the local content.
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// ------------------------------------------------------------------------------
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if (remote) {
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local = remoteContent;
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const syncTimeQueries = BaseItem.updateSyncTimeQueries(syncTargetId, local, time.unixMs());
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await ItemClass.save(local, { autoTimestamp: false, nextQueries: syncTimeQueries });
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if (!!local.encryption_applied) this.dispatch({ type: "SYNC_GOT_ENCRYPTED_ITEM" });
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} else {
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// Remote no longer exists (note deleted) so delete local one too
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await ItemClass.delete(local.id);
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}
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}
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donePaths.push(path);
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}
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if (!result.hasMore) break;
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}
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} // UPLOAD STEP
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// ========================================================================
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// 2. DELETE_REMOTE
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// ------------------------------------------------------------------------
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// Delete the remote items that have been deleted locally.
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// ========================================================================
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if (syncSteps.indexOf("delete_remote") >= 0) {
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let deletedItems = await BaseItem.deletedItems(syncTargetId);
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for (let i = 0; i < deletedItems.length; i++) {
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if (this.cancelling()) break;
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let item = deletedItems[i];
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let path = BaseItem.systemPath(item.item_id);
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this.logSyncOperation("deleteRemote", null, { id: item.item_id }, "local has been deleted");
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await this.api().delete(path);
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await BaseItem.remoteDeletedItem(syncTargetId, item.item_id);
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}
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} // DELETE_REMOTE STEP
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// ------------------------------------------------------------------------
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// 3. DELTA
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// ------------------------------------------------------------------------
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// Loop through all the remote items, find those that
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// have been updated, and apply the changes to local.
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// ------------------------------------------------------------------------
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if (syncSteps.indexOf("delta") >= 0) {
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// At this point all the local items that have changed have been pushed to remote
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// or handled as conflicts, so no conflict is possible after this.
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let context = null;
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let newDeltaContext = null;
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let localFoldersToDelete = [];
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let hasCancelled = false;
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if (lastContext.delta) context = lastContext.delta;
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while (true) {
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if (this.cancelling() || hasCancelled) break;
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let listResult = await this.api().delta("", {
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context: context,
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// allItemIdsHandler() provides a way for drivers that don't have a delta API to
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// still provide delta functionality by comparing the items they have to the items
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// the client has. Very inefficient but that's the only possible workaround.
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// It's a function so that it is only called if the driver needs these IDs. For
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// drivers with a delta functionality it's a noop.
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allItemIdsHandler: async () => {
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return BaseItem.syncedItemIds(syncTargetId);
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},
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});
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let remotes = listResult.items;
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this.logSyncOperation("fetchingTotal", null, null, "Fetching delta items from sync target", remotes.length);
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for (let i = 0; i < remotes.length; i++) {
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if (this.cancelling() || this.testingHooks_.indexOf("cancelDeltaLoop2") >= 0) {
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hasCancelled = true;
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break;
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}
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this.logSyncOperation("fetchingProcessed", null, null, "Processing fetched item");
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let remote = remotes[i];
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if (!BaseItem.isSystemPath(remote.path)) continue; // The delta API might return things like the .sync, .resource or the root folder
|
|
|
|
const loadContent = async () => {
|
|
let content = await this.api().get(path);
|
|
if (!content) return null;
|
|
return await BaseItem.unserialize(content);
|
|
};
|
|
|
|
let path = remote.path;
|
|
let action = null;
|
|
let reason = "";
|
|
let local = await BaseItem.loadItemByPath(path);
|
|
let ItemClass = null;
|
|
let content = null;
|
|
|
|
try {
|
|
if (!local) {
|
|
if (remote.isDeleted !== true) {
|
|
action = "createLocal";
|
|
reason = "remote exists but local does not";
|
|
content = await loadContent();
|
|
ItemClass = content ? BaseItem.itemClass(content) : null;
|
|
}
|
|
} else {
|
|
ItemClass = BaseItem.itemClass(local);
|
|
local = ItemClass.filter(local);
|
|
if (remote.isDeleted) {
|
|
action = "deleteLocal";
|
|
reason = "remote has been deleted";
|
|
} else {
|
|
content = await loadContent();
|
|
if (content && content.updated_time > local.updated_time) {
|
|
action = "updateLocal";
|
|
reason = "remote is more recent than local";
|
|
}
|
|
}
|
|
}
|
|
} catch (error) {
|
|
if (error.code === 'rejectedByTarget') {
|
|
this.progressReport_.errors.push(error);
|
|
this.logger().warn('Rejected by target: ' + path + ': ' + error.message);
|
|
action = null;
|
|
} else {
|
|
throw error;
|
|
}
|
|
}
|
|
|
|
if (!action) continue;
|
|
|
|
this.logSyncOperation(action, local, remote, reason);
|
|
|
|
if (action == "createLocal" || action == "updateLocal") {
|
|
if (content === null) {
|
|
this.logger().warn("Remote has been deleted between now and the delta() call? In that case it will be handled during the next sync: " + path);
|
|
continue;
|
|
}
|
|
content = ItemClass.filter(content);
|
|
|
|
// 2017-12-03: This was added because the new user_updated_time and user_created_time properties were added
|
|
// to the items. However changing the database is not enough since remote items that haven't been synced yet
|
|
// will not have these properties and, since they are required, it would cause a problem. So this check
|
|
// if they are present and, if not, set them to a reasonable default.
|
|
// Let's leave these two lines for 6 months, by which time all the clients should have been synced.
|
|
if (!content.user_updated_time) content.user_updated_time = content.updated_time;
|
|
if (!content.user_created_time) content.user_created_time = content.created_time;
|
|
|
|
let options = {
|
|
autoTimestamp: false,
|
|
nextQueries: BaseItem.updateSyncTimeQueries(syncTargetId, content, time.unixMs()),
|
|
};
|
|
if (action == "createLocal") options.isNew = true;
|
|
if (action == "updateLocal") options.oldItem = local;
|
|
|
|
if (content.type_ == BaseModel.TYPE_RESOURCE && action == "createLocal") {
|
|
let localResourceContentPath = Resource.fullPath(content);
|
|
let remoteResourceContentPath = this.resourceDirName_ + "/" + content.id;
|
|
try {
|
|
await this.api().get(remoteResourceContentPath, { path: localResourceContentPath, target: "file" });
|
|
} catch (error) {
|
|
if (error.code === 'rejectedByTarget') {
|
|
this.progressReport_.errors.push(error);
|
|
this.logger().warn('Rejected by target: ' + path + ': ' + error.message);
|
|
continue;
|
|
} else {
|
|
throw error;
|
|
}
|
|
}
|
|
}
|
|
|
|
await ItemClass.save(content, options);
|
|
|
|
if (!hasAutoEnabledEncryption && content.type_ === BaseModel.TYPE_MASTER_KEY && !masterKeysBefore) {
|
|
hasAutoEnabledEncryption = true;
|
|
this.logger().info("One master key was downloaded and none was previously available: automatically enabling encryption");
|
|
this.logger().info("Using master key: ", content);
|
|
await this.encryptionService().enableEncryption(content);
|
|
await this.encryptionService().loadMasterKeysFromSettings();
|
|
this.logger().info(
|
|
"Encryption has been enabled with downloaded master key as active key. However, note that no password was initially supplied. It will need to be provided by user."
|
|
);
|
|
}
|
|
|
|
if (!!content.encryption_applied) this.dispatch({ type: "SYNC_GOT_ENCRYPTED_ITEM" });
|
|
} else if (action == "deleteLocal") {
|
|
if (local.type_ == BaseModel.TYPE_FOLDER) {
|
|
localFoldersToDelete.push(local);
|
|
continue;
|
|
}
|
|
|
|
let ItemClass = BaseItem.itemClass(local.type_);
|
|
await ItemClass.delete(local.id, { trackDeleted: false });
|
|
}
|
|
}
|
|
|
|
// If user has cancelled, don't record the new context (2) so that synchronisation
|
|
// can start again from the previous context (1) next time. It is ok if some items
|
|
// have been synced between (1) and (2) because the loop above will handle the same
|
|
// items being synced twice as an update. If the local and remote items are identical
|
|
// the update will simply be skipped.
|
|
if (!hasCancelled) {
|
|
if (options.saveContextHandler) {
|
|
const deltaToSave = Object.assign({}, listResult.context);
|
|
// Remove these two variables because they can be large and can be rebuilt
|
|
// the next time the sync is started.
|
|
delete deltaToSave.statsCache;
|
|
delete deltaToSave.statIdsCache;
|
|
options.saveContextHandler({ delta: deltaToSave });
|
|
}
|
|
|
|
if (!listResult.hasMore) {
|
|
newDeltaContext = listResult.context;
|
|
break;
|
|
}
|
|
context = listResult.context;
|
|
}
|
|
}
|
|
|
|
outputContext.delta = newDeltaContext ? newDeltaContext : lastContext.delta;
|
|
|
|
// ------------------------------------------------------------------------
|
|
// Delete the folders that have been collected in the loop above.
|
|
// Folders are always deleted last, and only if they are empty.
|
|
// If they are not empty it's considered a conflict since whatever deleted
|
|
// them should have deleted their content too. In that case, all its notes
|
|
// are marked as "is_conflict".
|
|
// ------------------------------------------------------------------------
|
|
|
|
if (!this.cancelling()) {
|
|
for (let i = 0; i < localFoldersToDelete.length; i++) {
|
|
const item = localFoldersToDelete[i];
|
|
const noteIds = await Folder.noteIds(item.id);
|
|
if (noteIds.length) {
|
|
// CONFLICT
|
|
await Folder.markNotesAsConflict(item.id);
|
|
}
|
|
await Folder.delete(item.id, { deleteChildren: false, trackDeleted: false });
|
|
}
|
|
}
|
|
|
|
if (!this.cancelling()) {
|
|
await BaseItem.deleteOrphanSyncItems();
|
|
}
|
|
} // DELTA STEP
|
|
} catch (error) {
|
|
if (error && ["cannotEncryptEncrypted", "noActiveMasterKey"].indexOf(error.code) >= 0) {
|
|
// Only log an info statement for this since this is a common condition that is reported
|
|
// in the application, and needs to be resolved by the user
|
|
this.logger().info(error.message);
|
|
} else {
|
|
this.logger().error(error);
|
|
|
|
// Don't save to the report errors that are due to things like temporary network errors or timeout.
|
|
if (!shim.fetchRequestCanBeRetried(error)) this.progressReport_.errors.push(error);
|
|
}
|
|
}
|
|
|
|
if (this.cancelling()) {
|
|
this.logger().info('Synchronisation was cancelled.');
|
|
this.cancelling_ = false;
|
|
}
|
|
|
|
this.progressReport_.completedTime = time.unixMs();
|
|
|
|
this.logSyncOperation('finished', null, null, 'Synchronisation finished [' + synchronizationId + ']');
|
|
|
|
await this.logSyncSummary(this.progressReport_);
|
|
|
|
this.onProgress_ = function(s) {};
|
|
this.progressReport_ = {};
|
|
|
|
this.dispatch({ type: 'SYNC_COMPLETED' });
|
|
|
|
this.state_ = 'idle';
|
|
|
|
return outputContext;
|
|
}
|
|
|
|
}
|
|
|
|
module.exports = { Synchronizer };
|