All: Added backend for Dropbox support

ReactNativeClient/lib/SyncTargetDropbox.js

@@ -0,0 +1,54 @@
+const BaseSyncTarget = require('lib/BaseSyncTarget.js');
+const { _ } = require('lib/locale.js');
+const DropboxApi = require('lib/DropboxApi');
+const Setting = require('lib/models/Setting.js');
+const { parameters } = require('lib/parameters.js');
+const { FileApi } = require('lib/file-api.js');
+const { Synchronizer } = require('lib/synchronizer.js');
+const { FileApiDriverDropbox } = require('lib/file-api-driver-dropbox.js');
+
+class SyncTargetDropbox extends BaseSyncTarget {
+
+	static id() {
+		return 7;
+	}
+
+	constructor(db, options = null) {
+		super(db, options);
+		this.api_ = null;
+	}
+
+	static targetName() {
+		return 'dropbox';
+	}
+
+	static label() {
+		return _('Dropbox');
+	}
+
+	isAuthenticated() {
+		const f = this.fileApiSync();
+		return f && f.driver().api().authToken();
+	}
+
+	syncTargetId() {
+		return SyncTargetDropbox.id();
+	}
+
+	async initFileApi() {
+		const api = new DropboxApi();
+		const appDir = '';
+		const fileApi = new FileApi(appDir, new FileApiDriverDropbox(api));
+		fileApi.setSyncTargetId(this.syncTargetId());
+		fileApi.setLogger(this.logger());
+		return fileApi;
+	}
+
+	async initSynchronizer() {
+		if (!this.isAuthenticated()) throw new Error('User is not authentified');
+		return new Synchronizer(this.db(), await this.fileApi(), Setting.value('appType'));
+	}
+
+}
+
+module.exports = SyncTargetDropbox;