426 lines
12 KiB
JavaScript
426 lines
12 KiB
JavaScript
define(["jquery", "core", "async-runner"], function($, core, asyncTaskRunner) {
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// Dependencies
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var fileManager = undefined;
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var connected = false;
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var authenticated = false;
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var gdrive = {};
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// Try to connect Gdrive by downloading client.js
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function connect(callback) {
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callback = callback || core.doNothing;
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var asyncTask = {};
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asyncTask.run = function() {
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if (connected === true) {
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asyncTask.success();
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return;
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}
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delayedFunction = function() {
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asyncTask.success();
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};
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$.ajax({
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url : "https://apis.google.com/js/client.js?onload=runDelayedFunction",
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dataType : "script", timeout : AJAX_TIMEOUT
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}).fail(function() {
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asyncTask.error();
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});
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};
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asyncTask.onSuccess = function() {
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delayedFunction = undefined;
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connected = true;
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callback();
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};
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asyncTask.onError = function() {
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delayedFunction = undefined;
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core.setOffline();
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callback();
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};
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asyncTaskRunner.addTask(asyncTask);
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}
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// Try to authenticate with Oauth
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function authenticate(callback, immediate) {
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callback = callback || core.doNothing;
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if (immediate === undefined) {
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immediate = true;
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}
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connect(function() {
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if (connected === false) {
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callback();
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return;
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}
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var asyncTask = {};
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// If not immediate we add time for user to enter his credentials
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if (immediate === false) {
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asyncTask.timeout = AUTH_POPUP_TIMEOUT;
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}
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asyncTask.run = function() {
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if (authenticated === true) {
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asyncTask.success();
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return;
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}
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if (immediate === false) {
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core.showMessage("Please make sure the Google authorization popup is not blocked by your browser.");
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}
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gapi.auth.authorize({ 'client_id' : GOOGLE_CLIENT_ID,
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'scope' : GOOGLE_SCOPES, 'immediate' : immediate }, function(
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authResult) {
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if (!authResult || authResult.error) {
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asyncTask.error();
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return;
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}
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gapi.client.load('drive', 'v2', function() {
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authenticated = true;
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asyncTask.success();
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});
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});
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};
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asyncTask.onSuccess = function() {
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callback();
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};
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asyncTask.onError = function() {
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// If immediate did not work retry without immediate flag
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if (connected === true && immediate === true) {
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authenticate(callback, false);
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return;
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}
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callback();
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};
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asyncTaskRunner.addTask(asyncTask);
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});
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}
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function upload(fileId, parentId, title, content, callback) {
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callback = callback || core.doNothing;
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authenticate(function() {
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if (connected === false) {
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callback();
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return;
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}
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var fileSyncIndex = undefined;
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var asyncTask = {};
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asyncTask.run = function() {
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var boundary = '-------314159265358979323846';
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var delimiter = "\r\n--" + boundary + "\r\n";
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var close_delim = "\r\n--" + boundary + "--";
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var contentType = 'text/x-markdown';
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var metadata = { title : title, mimeType : contentType };
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if (parentId !== undefined) {
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// Specify the directory
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metadata.parents = [ { kind : 'drive#fileLink',
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id : parentId } ];
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}
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var path = '/upload/drive/v2/files';
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var method = 'POST';
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if (fileId !== undefined) {
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// If it's an update
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path += "/" + fileId;
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method = 'PUT';
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}
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var base64Data = core.encodeBase64(content);
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var multipartRequestBody = delimiter
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+ 'Content-Type: application/json\r\n\r\n'
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+ JSON.stringify(metadata) + delimiter + 'Content-Type: '
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+ contentType + '\r\n'
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+ 'Content-Transfer-Encoding: base64\r\n' + '\r\n'
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+ base64Data + close_delim;
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var request = gapi.client
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.request({
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'path' : path,
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'method' : method,
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'params' : { 'uploadType' : 'multipart', },
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'headers' : { 'Content-Type' : 'multipart/mixed; boundary="'
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+ boundary + '"', }, 'body' : multipartRequestBody, });
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request.execute(function(response) {
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if (response && response.id) {
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// Upload success
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fileSyncIndex = SYNC_PROVIDER_GDRIVE + response.id;
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localStorage[fileSyncIndex + ".etag"] = response.etag;
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asyncTask.success();
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return;
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}
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var error = response.error;
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// If it's an update and file has been removed from Google Drive
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if(error !== undefined && fileId !== undefined && error.code === 404) {
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core.showMessage('"' + title + '" has been removed from Google Drive.');
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fileManager.removeSync(SYNC_PROVIDER_GDRIVE + fileId);
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fileManager.updateFileTitles();
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// We assume it's not error
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fileSyncIndex = null;
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asyncTask.success();
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return;
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}
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// Handle error
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handleError(error, asyncTask, callback);
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});
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};
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asyncTask.onSuccess = function() {
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callback(fileSyncIndex);
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};
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asyncTaskRunner.addTask(asyncTask);
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});
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}
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gdrive.checkUpdates = function(lastChangeId, callback) {
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callback = callback || core.doNothing;
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authenticate(function() {
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if (connected === false) {
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callback();
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return;
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}
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var changes = [];
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var newChangeId = lastChangeId || 0;
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function retrievePageOfChanges(request) {
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var nextPageToken = undefined;
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var asyncTask = {};
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asyncTask.run = function() {
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request.execute(function(response) {
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if (response && response.largestChangeId) {
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// Retrieve success
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newChangeId = response.largestChangeId;
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nextPageToken = response.nextPageToken;
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if (response.items !== undefined) {
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for ( var i = 0; i < response.items.length; i++) {
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var item = response.items[i];
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var etag = localStorage[SYNC_PROVIDER_GDRIVE
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+ item.fileId + ".etag"];
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if (etag
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&& (item.deleted === true || item.file.etag != etag)) {
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changes.push(item);
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}
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}
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}
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asyncTask.success();
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return;
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}
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// Handle error
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handleError(response.error, asyncTask, callback);
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});
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};
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asyncTask.onSuccess = function() {
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if (nextPageToken !== undefined) {
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request = gapi.client.drive.changes
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.list({ 'pageToken' : nextPageToken });
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retrievePageOfChanges(request);
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} else {
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callback(changes, newChangeId);
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}
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};
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asyncTaskRunner.addTask(asyncTask);
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}
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var initialRequest = gapi.client.drive.changes
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.list({ 'startChangeId' : newChangeId + 1 });
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retrievePageOfChanges(initialRequest);
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});
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};
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gdrive.downloadMetadata = function(ids, callback, result) {
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callback = callback || core.doNothing;
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result = result || [];
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if(ids.length === 0) {
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callback(result);
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return;
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}
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authenticate(function() {
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if (connected === false) {
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callback();
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return;
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}
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var id = ids.pop();
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var asyncTask = {};
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asyncTask.run = function() {
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var accessToken = gapi.auth.getToken().access_token;
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$.ajax({
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url : "https://www.googleapis.com/drive/v2/files/" + id,
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headers : { "Authorization" : "Bearer " + accessToken },
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dataType : "json",
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timeout : AJAX_TIMEOUT
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}).done(function(data, textStatus, jqXHR) {
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result.push(data);
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asyncTask.success();
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}).fail(function(jqXHR) {
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var error = {
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code: jqXHR.status,
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message: jqXHR.statusText
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};
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// Handle error
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if(error.code === 404) {
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error = "File is not available.";
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}
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handleError(error, asyncTask, callback);
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});
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};
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asyncTask.onSuccess = function() {
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gdrive.downloadMetadata(ids, callback, result);
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};
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asyncTaskRunner.addTask(asyncTask);
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});
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};
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gdrive.downloadContent = function(objects, callback, result) {
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callback = callback || core.doNothing;
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result = result || [];
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if(objects.length === 0) {
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callback(result);
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return;
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}
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var object = objects.pop();
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result.push(object);
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var file = undefined;
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// object may be a file
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if(object.kind == "drive#file") {
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file = object;
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}
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// object may be a change
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else if(object.kind == "drive#change") {
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file = object.file;
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}
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if(file === undefined) {
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this.downloadContent(objects, callback, result);
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return;
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}
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authenticate(function() {
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if (connected === false) {
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callback();
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return;
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}
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var asyncTask = {};
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asyncTask.run = function() {
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var accessToken = gapi.auth.getToken().access_token;
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$.ajax({
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url : file.downloadUrl,
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headers : { "Authorization" : "Bearer " + accessToken },
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dataType : "text",
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timeout : AJAX_TIMEOUT
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}).done(function(data, textStatus, jqXHR) {
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file.content = data;
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asyncTask.success();
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}).fail(function(jqXHR) {
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var error = {
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code: jqXHR.status,
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message: jqXHR.statusText
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};
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// Handle error
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handleError(error, asyncTask, callback);
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});
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};
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asyncTask.onSuccess = function() {
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gdrive.downloadContent(objects, callback, result);
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};
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asyncTaskRunner.addTask(asyncTask);
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});
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};
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function handleError(error, asyncTask, callback) {
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var errorMsg = undefined;
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asyncTask.onError = function() {
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if (errorMsg !== undefined) {
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core.showError(errorMsg);
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}
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callback();
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};
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if (error) {
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// Try to analyze the error
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if (typeof error === "string") {
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errorMsg = error;
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}
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else if (error.code >= 500 && error.code < 600) {
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errorMsg = "Google Drive is not accessible.";
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// Retry as described in Google's best practices
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asyncTask.retry();
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return;
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} else if (error.code === 401 || error.code === 403) {
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authenticated = false;
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errorMsg = "Access to Google Drive is not authorized.";
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} else if (error.code <= 0) {
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connected = false;
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authenticated = false;
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core.setOffline();
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} else {
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errorMsg = "Google Drive error (" + error.code + ": "
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+ error.message + ").";
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}
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}
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asyncTask.error();
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}
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gdrive.createFile = function(title, content, callback) {
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upload(undefined, undefined, title, content, callback);
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};
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gdrive.updateFile = function(id, title, content, callback) {
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upload(id, undefined, title, content, callback);
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};
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gdrive.importFiles = function(ids) {
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gdrive.downloadMetadata(ids, function(result) {
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if(result === undefined) {
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return;
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}
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gdrive.downloadContent(result, function(result) {
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if(result === undefined) {
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return;
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}
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for(var i=0; i<result.length; i++) {
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var file = result[i];
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fileSyncIndex = SYNC_PROVIDER_GDRIVE + file.id;
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localStorage[fileSyncIndex + ".etag"] = file.etag;
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var fileIndex = fileManager.createFile(file.title, file.content, [fileSyncIndex]);
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fileManager.selectFile(fileIndex);
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core.showMessage('"' + file.title + '" imported successfully from Google Drive.');
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}
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});
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});
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};
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gdrive.init = function(fileManagerModule) {
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fileManager = fileManagerModule;
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var state = localStorage["sync.gdrive.state"];
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if(state === undefined) {
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return;
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}
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localStorage.removeItem("sync.gdrive.state");
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state = JSON.parse(state);
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if (state.action == "create") {
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upload(undefined, state.folderId, GDRIVE_DEFAULT_FILE_TITLE,
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"", function(fileSyncIndex) {
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if(fileSyncIndex === undefined) {
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return;
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}
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var fileIndex = fileManager.createFile(GDRIVE_DEFAULT_FILE_TITLE, "", [fileSyncIndex]);
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fileManager.selectFile(fileIndex);
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core.showMessage('"' + GDRIVE_DEFAULT_FILE_TITLE + '" created successfully on Google Drive.');
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});
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}
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else if (state.action == "open") {
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var ids = [];
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for(var i=0; i<state.ids.length; i++) {
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var id = state.ids[i];
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var fileSyncIndex = SYNC_PROVIDER_GDRIVE + id;
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var fileIndex = fileManager.getFileIndexFromSync(fileSyncIndex);
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if(fileIndex !== undefined) {
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fileManager.selectFile(fileIndex);
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} else {
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ids.push(id);
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}
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}
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gdrive.importFiles(ids);
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}
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};
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return gdrive;
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});
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