Move sync target info handling to separate class

.eslintignore

@@ -1424,6 +1424,9 @@ packages/lib/services/synchronizer/LockHandler.js.map
 packages/lib/services/synchronizer/MigrationHandler.d.ts
 packages/lib/services/synchronizer/MigrationHandler.js
 packages/lib/services/synchronizer/MigrationHandler.js.map
+packages/lib/services/synchronizer/SyncTargetInfoHandler.d.ts
+packages/lib/services/synchronizer/SyncTargetInfoHandler.js
+packages/lib/services/synchronizer/SyncTargetInfoHandler.js.map
 packages/lib/services/synchronizer/Synchronizer.basics.test.d.ts
 packages/lib/services/synchronizer/Synchronizer.basics.test.js
 packages/lib/services/synchronizer/Synchronizer.basics.test.js.map

.gitignore

@@ -1410,6 +1410,9 @@ packages/lib/services/synchronizer/LockHandler.js.map
 packages/lib/services/synchronizer/MigrationHandler.d.ts
 packages/lib/services/synchronizer/MigrationHandler.js
 packages/lib/services/synchronizer/MigrationHandler.js.map
+packages/lib/services/synchronizer/SyncTargetInfoHandler.d.ts
+packages/lib/services/synchronizer/SyncTargetInfoHandler.js
+packages/lib/services/synchronizer/SyncTargetInfoHandler.js.map
 packages/lib/services/synchronizer/Synchronizer.basics.test.d.ts
 packages/lib/services/synchronizer/Synchronizer.basics.test.js
 packages/lib/services/synchronizer/Synchronizer.basics.test.js.map

packages/lib/Synchronizer.ts

@@ -21,6 +21,7 @@ import ShareService from './services/share/ShareService';
 import TaskQueue from './TaskQueue';
 import ItemUploader from './services/synchronizer/ItemUploader';
 import { FileApi } from './file-api';
+import SyncTargetInfoHandler from './services/synchronizer/SyncTargetInfoHandler';
 const { sprintf } = require('sprintf-js');
 const { Dirnames } = require('./services/synchronizer/utils/types');
 
@@ -73,6 +74,7 @@ export default class Synchronizer {
 	private clientId_: string;
 	private lockHandler_: LockHandler;
 	private migrationHandler_: MigrationHandler;
+	private syncTargetInfoHandler_: SyncTargetInfoHandler;
 	private encryptionService_: EncryptionService = null;
 	private resourceService_: ResourceService = null;
 	private syncTargetIsLocked_: boolean = false;
@@ -125,18 +127,24 @@ export default class Synchronizer {
 		return this.logger_;
 	}
 
-	lockHandler() {
+	public lockHandler() {
 		if (this.lockHandler_) return this.lockHandler_;
 		this.lockHandler_ = new LockHandler(this.api());
 		return this.lockHandler_;
 	}
 
-	migrationHandler() {
+	private migrationHandler() {
 		if (this.migrationHandler_) return this.migrationHandler_;
-		this.migrationHandler_ = new MigrationHandler(this.api(), this.lockHandler(), this.appType_, this.clientId_);
+		this.migrationHandler_ = new MigrationHandler(this.api(), this.syncTargetInfoHandler(), this.lockHandler(), this.appType_, this.clientId_);
 		return this.migrationHandler_;
 	}
 
+	public syncTargetInfoHandler() {
+		if (this.syncTargetInfoHandler_) return this.syncTargetInfoHandler_;
+		this.syncTargetInfoHandler_ = new SyncTargetInfoHandler(this.api());
+		return this.syncTargetInfoHandler_;
+	}
+
 	maxResourceSize() {
 		if (this.maxResourceSize_ !== null) return this.maxResourceSize_;
 		return this.appType_ === 'mobile' ? 100 * 1000 * 1000 : Infinity;
@@ -415,7 +423,11 @@ export default class Synchronizer {
 			this.api().setTempDirName(Dirnames.Temp);
 
 			try {
-				const syncTargetInfo = await this.migrationHandler().checkCanSync();
+				const syncTargetInfoService = new SyncTargetInfoHandler(this.api());
+
+				await this.migrationHandler().checkCanSync();
+
+				const syncTargetInfo = await syncTargetInfoService.info();
 
 				this.logger().info('Sync target info:', syncTargetInfo);
 

packages/lib/services/synchronizer/MigrationHandler.ts

@@ -16,50 +16,29 @@ const migrations = [
 import Setting from '../../models/Setting';
 const { sprintf } = require('sprintf-js');
 import JoplinError from '../../JoplinError';
-
-interface SyncTargetInfo {
-	version: number;
-}
+import SyncTargetInfoHandler from './SyncTargetInfoHandler';
+import { FileApi } from '../../file-api';
 
 export default class MigrationHandler extends BaseService {
 
-	private api_: any = null;
+	private api_: FileApi = null;
 	private lockHandler_: LockHandler = null;
+	private syncTargetInfoHandler_: SyncTargetInfoHandler = null;
 	private clientType_: string;
 	private clientId_: string;
 
-	constructor(api: any, lockHandler: LockHandler, clientType: string, clientId: string) {
+	constructor(api: FileApi, syncTargetInfoHandler: SyncTargetInfoHandler, lockHandler: LockHandler, clientType: string, clientId: string) {
 		super();
 		this.api_ = api;
+		this.syncTargetInfoHandler_ = syncTargetInfoHandler;
 		this.lockHandler_ = lockHandler;
 		this.clientType_ = clientType;
 		this.clientId_ = clientId;
 	}
 
-	public async fetchSyncTargetInfo(): Promise<SyncTargetInfo> {
-		const syncTargetInfoText = await this.api_.get('info.json');
-
-		// Returns version 0 if the sync target is empty
-		let output: SyncTargetInfo = { version: 0 };
-
-		if (syncTargetInfoText) {
-			output = JSON.parse(syncTargetInfoText);
-			if (!output.version) throw new Error('Missing "version" field in info.json');
-		} else {
-			const oldVersion = await this.api_.get('.sync/version.txt');
-			if (oldVersion) output = { version: 1 };
-		}
-
-		return output;
-	}
-
-	private serializeSyncTargetInfo(info: SyncTargetInfo) {
-		return JSON.stringify(info);
-	}
-
-	async checkCanSync(): Promise<SyncTargetInfo> {
+	public async checkCanSync(): Promise<void> {
 		const supportedSyncTargetVersion = Setting.value('syncVersion');
-		const syncTargetInfo = await this.fetchSyncTargetInfo();
+		const syncTargetInfo = await this.syncTargetInfoHandler_.info();
 
 		if (syncTargetInfo.version) {
 			if (syncTargetInfo.version > supportedSyncTargetVersion) {
@@ -68,13 +47,11 @@ export default class MigrationHandler extends BaseService {
 				throw new JoplinError(sprintf('Sync version of the target (%d) is lower than the version supported by the client (%d). Please upgrade the sync target.', syncTargetInfo.version, supportedSyncTargetVersion), 'outdatedSyncTarget');
 			}
 		}
-
-		return syncTargetInfo;
 	}
 
-	async upgrade(targetVersion: number = 0) {
+	public async upgrade(targetVersion: number = 0) {
 		const supportedSyncTargetVersion = Setting.value('syncVersion');
-		const syncTargetInfo = await this.fetchSyncTargetInfo();
+		const syncTargetInfo = await this.syncTargetInfoHandler_.info();
 
 		if (syncTargetInfo.version > supportedSyncTargetVersion) {
 			throw new JoplinError(sprintf('Sync version of the target (%d) is greater than the version supported by the client (%d). Please upgrade your client.', syncTargetInfo.version, supportedSyncTargetVersion), 'outdatedClient');
@@ -122,10 +99,10 @@ export default class MigrationHandler extends BaseService {
 					await migration(this.api_);
 					if (autoLockError) throw autoLockError;
 
-					await this.api_.put('info.json', this.serializeSyncTargetInfo({
+					await this.syncTargetInfoHandler_.setInfo({
 						...syncTargetInfo,
 						version: newVersion,
-					}));
+					});
 
 					this.logger().info(`MigrationHandler: Done migrating from version ${fromVersion} to version ${newVersion}`);
 				} catch (error) {

packages/lib/services/synchronizer/SyncTargetInfoHandler.ts

@@ -0,0 +1,52 @@
+import { FileApi } from '../../file-api';
+
+interface SyncTargetInfo {
+	version: number;
+}
+
+export default class SyncTargetInfoHandler {
+
+	private api_: FileApi = null;
+	private info_: SyncTargetInfo = null;
+
+	public constructor(api: FileApi) {
+		this.api_ = api;
+	}
+
+	public async info(): Promise<SyncTargetInfo> {
+		if (this.info_) return this.info_;
+		this.info_ = await this.fetchSyncTargetInfo();
+		return this.info_;
+	}
+
+	private serializeSyncTargetInfo(info: SyncTargetInfo): string {
+		return JSON.stringify(info);
+	}
+
+	private unserializeSyncTargetInfo(info: string): SyncTargetInfo {
+		return JSON.parse(info);
+	}
+
+	public async setInfo(info: SyncTargetInfo): Promise<void> {
+		this.info_ = info;
+		await this.api_.put('info.json', this.serializeSyncTargetInfo(info));
+	}
+
+	private async fetchSyncTargetInfo(): Promise<SyncTargetInfo> {
+		const syncTargetInfoText = await this.api_.get('info.json');
+
+		// Returns version 0 if the sync target is empty
+		let output: SyncTargetInfo = { version: 0 };
+
+		if (syncTargetInfoText) {
+			output = this.unserializeSyncTargetInfo(syncTargetInfoText);
+			if (!output.version) throw new Error('Missing "version" field in info.json');
+		} else {
+			const oldVersion = await this.api_.get('.sync/version.txt');
+			if (oldVersion) output = { version: 1 };
+		}
+
+		return output;
+	}
+
+}

packages/lib/services/synchronizer/gui/useSyncTargetUpgrade.ts

@@ -3,6 +3,7 @@ import MigrationHandler from '../MigrationHandler';
 const { useEffect, useState } = shim.react();
 import Setting from '../../../models/Setting';
 import { reg } from '../../../registry';
+import Synchronizer from '../../../Synchronizer';
 
 export interface SyncTargetUpgradeResult {
 	done: boolean;
@@ -21,11 +22,12 @@ export default function useSyncTargetUpgrade(): SyncTargetUpgradeResult {
 		let error = null;
 		try {
 			reg.logger().info('useSyncTargetUpgrade: Acquire synchronizer...');
-			const synchronizer = await reg.syncTarget().synchronizer();
+			const synchronizer: Synchronizer = await reg.syncTarget().synchronizer();
 
 			reg.logger().info('useSyncTargetUpgrade: Create migration handler...');
 			const migrationHandler = new MigrationHandler(
 				synchronizer.api(),
+				synchronizer.syncTargetInfoHandler(),
 				synchronizer.lockHandler(),
 				Setting.value('appType'),
 				Setting.value('clientId')

packages/lib/services/synchronizer/synchronizer_MigrationHandler.test.ts

@@ -8,15 +8,23 @@ import { Dirnames } from '../../services/synchronizer/utils/types';
 // gulp buildTests -L && node tests-build/support/createSyncTargetSnapshot.js normal && node tests-build/support/createSyncTargetSnapshot.js e2ee
 
 
-const { setSyncTargetName, fileApi, synchronizer, decryptionWorker, encryptionService, setupDatabaseAndSynchronizer, switchClient, expectThrow, expectNotThrow } = require('../../testing/test-utils.js');
+import { setSyncTargetName, fileApi, synchronizer, decryptionWorker, encryptionService, setupDatabaseAndSynchronizer, switchClient, expectThrow, expectNotThrow } from '../../testing/test-utils';
 const { deploySyncTargetSnapshot, testData, checkTestData } = require('../../testing/syncTargetUtils');
 import Setting from '../../models/Setting';
 import MasterKey from '../../models/MasterKey';
+import SyncTargetInfoHandler from './SyncTargetInfoHandler';
 
 const specTimeout = 60000 * 10; // Nextcloud tests can be slow
 
 let lockHandler_: LockHandler = null;
 let migrationHandler_: MigrationHandler = null;
+let syncTargetInfo_: SyncTargetInfoHandler = null;
+
+function syncTargetInfoHandler(): SyncTargetInfoHandler {
+	if (syncTargetInfo_) return syncTargetInfo_;
+	syncTargetInfo_ = new SyncTargetInfoHandler(fileApi());
+	return syncTargetInfo_;
+}
 
 function lockHandler(): LockHandler {
 	if (lockHandler_) return lockHandler_;
@@ -26,7 +34,7 @@ function lockHandler(): LockHandler {
 
 function migrationHandler(clientId: string = 'abcd'): MigrationHandler {
 	if (migrationHandler_) return migrationHandler_;
-	migrationHandler_ = new MigrationHandler(fileApi(), lockHandler(), 'desktop', clientId);
+	migrationHandler_ = new MigrationHandler(fileApi(), syncTargetInfoHandler(), lockHandler(), 'desktop', clientId);
 	return migrationHandler_;
 }
 
@@ -66,6 +74,7 @@ describe('synchronizer_MigrationHandler', function() {
 		previousSyncTargetName = setSyncTargetName('filesystem');
 		lockHandler_ = null;
 		migrationHandler_ = null;
+		syncTargetInfo_ = null;
 		await setupDatabaseAndSynchronizer(1);
 		await setupDatabaseAndSynchronizer(2);
 		await switchClient(1);
@@ -103,14 +112,14 @@ describe('synchronizer_MigrationHandler', function() {
 		it(`should migrate (${migrationVersion})`, (async () => {
 			await deploySyncTargetSnapshot('normal', migrationVersion - 1);
 
-			const info = await migrationHandler().fetchSyncTargetInfo();
+			const info = await syncTargetInfoHandler().info();
 			expect(info.version).toBe(migrationVersion - 1);
 
 			// Now, migrate to the new version
 			await migrationHandler().upgrade(migrationVersion);
 
 			// Verify that it has been upgraded
-			const newInfo = await migrationHandler().fetchSyncTargetInfo();
+			const newInfo = await syncTargetInfoHandler().info();
 			expect(newInfo.version).toBe(migrationVersion);
 			await migrationTests[migrationVersion]();
 
@@ -137,7 +146,7 @@ describe('synchronizer_MigrationHandler', function() {
 			await migrationHandler().upgrade(migrationVersion);
 
 			// Verify that it has been upgraded
-			const newInfo = await migrationHandler().fetchSyncTargetInfo();
+			const newInfo = await syncTargetInfoHandler().info();
 			expect(newInfo.version).toBe(migrationVersion);
 			await migrationTests[migrationVersion]();
 

packages/lib/testing/test-utils.ts

@@ -28,7 +28,6 @@ import NoteTag from '../models/NoteTag';
 import Revision from '../models/Revision';
 import MasterKey from '../models/MasterKey';
 import BaseItem from '../models/BaseItem';
-const { FileApi } = require('../file-api.js');
 const FileApiDriverMemory = require('../file-api-driver-memory').default;
 const { FileApiDriverLocal } = require('../file-api-driver-local.js');
 const { FileApiDriverWebDav } = require('../file-api-driver-webdav.js');
@@ -52,6 +51,7 @@ import JoplinServerApi from '../JoplinServerApi';
 import { FolderEntity } from '../services/database/types';
 import { credentialFile, readCredentialFile } from '../utils/credentialFiles';
 import SyncTargetJoplinCloud from '../SyncTargetJoplinCloud';
+import { FileApi } from '../file-api';
 const { loadKeychainServiceAndSettings } = require('../services/SettingUtils');
 const md5 = require('md5');
 const S3 = require('aws-sdk/clients/s3');
@@ -602,7 +602,7 @@ async function initFileApi() {
 	fileApis_[syncTargetId_] = fileApi;
 }
 
-function fileApi() {
+function fileApi(): FileApi {
 	return fileApis_[syncTargetId_];
 }