Stackedit/js/helpers/google-helper.js

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define([
"jquery",
"core",
"utils",
"extension-manager",
"async-runner"
], function($, core, utils, extensionMgr, asyncRunner) {
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var connected = false;
var authenticated = false;
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var googleHelper = {};
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// Try to connect Gdrive by downloading client.js
function connect(task) {
task.onRun(function() {
if(core.isOffline === true) {
connected = false;
task.error(new Error("Operation not available in offline mode.|stopPublish"));
return;
}
if(connected === true) {
task.chain();
return;
}
delayedFunction = function() {
connected = true;
task.chain();
};
$.ajax({
url: "https://apis.google.com/js/client.js?onload=runDelayedFunction",
dataType: "script",
timeout: AJAX_TIMEOUT
}).fail(function(jqXHR) {
var error = {
code: jqXHR.status,
message: jqXHR.statusText
};
handleError(error, task);
});
});
}
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// Try to authenticate with Oauth
function authenticate(task) {
task.onRun(function() {
if(authenticated === true) {
task.chain();
return;
}
var immediate = true;
function localAuthenticate() {
if(immediate === false) {
extensionMgr.onMessage("Please make sure the Google authorization popup is not blocked by your browser.");
// If not immediate we add time for user to enter his
// credentials
task.timeout = ASYNC_TASK_LONG_TIMEOUT;
}
gapi.auth.authorize({
'client_id': GOOGLE_CLIENT_ID,
'scope': GOOGLE_SCOPES,
'immediate': immediate
}, function(authResult) {
gapi.client.load('drive', 'v2', function() {
if(!authResult || authResult.error) {
// If immediate did not work retry without immediate
// flag
if(connected === true && immediate === true) {
immediate = false;
task.chain(localAuthenticate);
return;
}
// Error
task.error(new Error("Access to Google account is not authorized."));
return;
}
// Success
authenticated = true;
task.chain();
});
});
}
task.chain(localAuthenticate);
});
}
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googleHelper.upload = function(fileId, parentId, title, content, etag, callback) {
var result = undefined;
var task = asyncRunner.createTask();
connect(task);
authenticate(task);
task.onRun(function() {
var boundary = '-------314159265358979323846';
var delimiter = "\r\n--" + boundary + "\r\n";
var close_delim = "\r\n--" + boundary + "--";
var contentType = 'text/x-markdown';
var metadata = {
title: title,
mimeType: contentType
};
if(parentId !== undefined) {
// Specify the directory
metadata.parents = [
{
kind: 'drive#fileLink',
id: parentId
}
];
}
var path = '/upload/drive/v2/files';
var method = 'POST';
if(fileId !== undefined) {
// If it's an update
path += "/" + fileId;
method = 'PUT';
}
var headers = {
'Content-Type': 'multipart/mixed; boundary="' + boundary + '"',
};
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// Sometimes we have error 412 from Google even with the correct
// etag
// if(etag !== undefined) {
// headers["If-Match"] = etag;
// }
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var base64Data = utils.encodeBase64(content);
var multipartRequestBody = delimiter + 'Content-Type: application/json\r\n\r\n' + JSON.stringify(metadata) + delimiter + 'Content-Type: ' + contentType + '\r\n' + 'Content-Transfer-Encoding: base64\r\n' + '\r\n' + base64Data + close_delim;
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var request = gapi.client.request({
'path': path,
'method': method,
'params': {
'uploadType': 'multipart',
},
'headers': headers,
'body': multipartRequestBody,
});
request.execute(function(response) {
if(response && response.id) {
// Upload success
result = response;
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result.content = content;
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task.chain();
return;
}
var error = response.error;
// Handle error
if(error !== undefined && fileId !== undefined) {
if(error.code === 404) {
error = 'File ID "' + fileId + '" not found on Google Drive.|removePublish';
}
else if(error.code === 412) {
// We may have missed a file update
localStorage.removeItem("gdrive.lastChangeId");
error = 'Conflict on file ID "' + fileId + '". Please restart the synchronization.';
}
}
handleError(error, task);
});
});
task.onSuccess(function() {
callback(undefined, result);
});
task.onError(function(error) {
callback(error);
});
asyncRunner.addTask(task);
};
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googleHelper.checkChanges = function(lastChangeId, callback) {
var changes = [];
var newChangeId = lastChangeId || 0;
var task = asyncRunner.createTask();
connect(task);
authenticate(task);
task.onRun(function() {
var nextPageToken = undefined;
function retrievePageOfChanges() {
var request = undefined;
if(nextPageToken === undefined) {
request = gapi.client.drive.changes.list({
'startChangeId': newChangeId + 1
});
}
else {
request = gapi.client.drive.changes.list({
'pageToken': nextPageToken
});
}
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request.execute(function(response) {
if(!response || !response.largestChangeId) {
// Handle error
handleError(response.error, task);
return;
}
// Retrieve success
newChangeId = response.largestChangeId;
nextPageToken = response.nextPageToken;
if(response.items !== undefined) {
changes = changes.concat(response.items);
}
if(nextPageToken !== undefined) {
task.chain(retrievePageOfChanges);
}
else {
task.chain();
}
});
}
task.chain(retrievePageOfChanges);
});
task.onSuccess(function() {
callback(undefined, changes, newChangeId);
});
task.onError(function(error) {
callback(error);
});
asyncRunner.addTask(task);
};
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googleHelper.downloadMetadata = function(ids, callback, skipAuth) {
var result = [];
var task = asyncRunner.createTask();
connect(task);
if(!skipAuth) {
authenticate(task);
}
task.onRun(function() {
function recursiveDownloadMetadata() {
if(ids.length === 0) {
task.chain();
return;
}
var id = ids[0];
var headers = {};
var token = gapi.auth.getToken();
if(token) {
headers.Authorization = "Bearer " + token.access_token;
}
$.ajax({
url: "https://www.googleapis.com/drive/v2/files/" + id,
headers: headers,
data: {
key: GOOGLE_API_KEY
},
dataType: "json",
timeout: AJAX_TIMEOUT
}).done(function(data, textStatus, jqXHR) {
result.push(data);
ids.shift();
task.chain(recursiveDownloadMetadata);
}).fail(function(jqXHR) {
var error = {
code: jqXHR.status,
message: jqXHR.statusText
};
// Handle error
if(error.code === 404) {
error = 'File ID "' + id + '" not found on Google Drive.';
}
handleError(error, task);
});
}
task.chain(recursiveDownloadMetadata);
});
task.onSuccess(function() {
callback(undefined, result);
});
task.onError(function(error) {
callback(error);
});
asyncRunner.addTask(task);
};
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googleHelper.downloadContent = function(objects, callback, skipAuth) {
var result = [];
var task = asyncRunner.createTask();
// Add some time for user to choose his files
task.timeout = ASYNC_TASK_LONG_TIMEOUT;
connect(task);
if(!skipAuth) {
authenticate(task);
}
task.onRun(function() {
function recursiveDownloadContent() {
if(objects.length === 0) {
task.chain();
return;
}
var object = objects[0];
result.push(object);
var file = undefined;
// object may be a file
if(object.kind == "drive#file") {
file = object;
}
// object may be a change
else if(object.kind == "drive#change") {
file = object.file;
}
if(!file) {
objects.shift();
task.chain(recursiveDownloadContent);
return;
}
var headers = {};
var token = gapi.auth.getToken();
if(token) {
headers.Authorization = "Bearer " + token.access_token;
}
$.ajax({
url: file.downloadUrl,
headers: headers,
data: {
key: GOOGLE_API_KEY
},
dataType: "text",
timeout: AJAX_TIMEOUT
}).done(function(data, textStatus, jqXHR) {
file.content = data;
objects.shift();
task.chain(recursiveDownloadContent);
}).fail(function(jqXHR) {
var error = {
code: jqXHR.status,
message: jqXHR.statusText
};
// Handle error
handleError(error, task);
});
}
task.chain(recursiveDownloadContent);
});
task.onSuccess(function() {
callback(undefined, result);
});
task.onError(function(error) {
callback(error);
});
asyncRunner.addTask(task);
};
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function handleError(error, task) {
var errorMsg = undefined;
if(error) {
logger.error(error);
// Try to analyze the error
if(typeof error === "string") {
errorMsg = error;
}
else {
errorMsg = "Google error (" + error.code + ": " + error.message + ").";
if(error.code >= 500 && error.code < 600) {
// Retry as described in Google's best practices
task.retry(new Error(errorMsg));
return;
}
else if(error.code === 401 || error.code === 403) {
authenticated = false;
errorMsg = "Access to Google account is not authorized.";
task.retry(new Error(errorMsg), 1);
return;
}
else if(error.code <= 0) {
connected = false;
authenticated = false;
core.setOffline();
errorMsg = "|stopPublish";
}
}
}
task.error(new Error(errorMsg));
}
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var pickerLoaded = false;
function loadPicker(task) {
task.onRun(function() {
if(pickerLoaded === true) {
task.chain();
return;
}
$.ajax({
url: "//www.google.com/jsapi",
data: {
key: GOOGLE_API_KEY
},
dataType: "script",
timeout: AJAX_TIMEOUT
}).done(function() {
google.load('picker', '1', {
callback: task.chain
});
pickerLoaded = true;
}).fail(function(jqXHR) {
var error = {
code: jqXHR.status,
message: jqXHR.statusText
};
handleError(error, task);
});
});
}
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googleHelper.picker = function(callback, isImagePicker) {
var docs = [];
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var picker = undefined;
function hidePicker() {
if(picker !== undefined) {
picker.setVisible(false);
$(".modal-backdrop, .picker").remove();
}
}
var task = asyncRunner.createTask();
connect(task);
loadPicker(task);
task.onRun(function() {
var pickerBuilder = new google.picker.PickerBuilder();
pickerBuilder.setAppId(GOOGLE_DRIVE_APP_ID);
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if(!isImagePicker) {
var view = new google.picker.View(google.picker.ViewId.DOCS);
view.setMimeTypes("text/x-markdown,text/plain,application/octet-stream");
pickerBuilder.enableFeature(google.picker.Feature.NAV_HIDDEN);
pickerBuilder.enableFeature(google.picker.Feature.MULTISELECT_ENABLED);
pickerBuilder.addView(view);
}
else {
pickerBuilder.addView(google.picker.ViewId.PHOTOS);
pickerBuilder.addView(google.picker.ViewId.PHOTO_UPLOAD);
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}
pickerBuilder.setCallback(function(data) {
if(data.action == google.picker.Action.PICKED || data.action == google.picker.Action.CANCEL) {
if(data.action == google.picker.Action.PICKED) {
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docs = data.docs;
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}
hidePicker();
task.chain();
}
});
picker = pickerBuilder.build();
$("body").append($("<div>").addClass("modal-backdrop").click(function() {
hidePicker();
task.chain();
}));
picker.setVisible(true);
});
task.onSuccess(function() {
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callback(undefined, docs);
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});
task.onError(function(error) {
hidePicker();
callback(error);
});
asyncRunner.addTask(task);
};
googleHelper.uploadBlogger = function(blogUrl, blogId, postId, labelList, title, content, callback) {
var task = asyncRunner.createTask();
connect(task);
authenticate(task);
task.onRun(function() {
var headers = {};
var token = gapi.auth.getToken();
if(token) {
headers.Authorization = "Bearer " + token.access_token;
}
function publish() {
var url = "https://www.googleapis.com/blogger/v3/blogs/" + blogId + "/posts/";
var data = {
kind: "blogger#post",
blog: {
id: blogId
},
labels: labelList,
title: title,
content: content
};
var type = "POST";
// If it's an update
if(postId !== undefined) {
url += postId;
data.id = postId;
type = "PUT";
}
$.ajax({
url: url,
data: JSON.stringify(data),
headers: headers,
type: type,
contentType: "application/json",
dataType: "json",
timeout: AJAX_TIMEOUT
}).done(function(post, textStatus, jqXHR) {
postId = post.id;
task.chain();
}).fail(function(jqXHR) {
var error = {
code: jqXHR.status,
message: jqXHR.statusText
};
// Handle error
if(error.code === 404 && postId !== undefined) {
error = 'Post ' + postId + ' not found on Blogger.|removePublish';
}
handleError(error, task);
});
}
function getBlogId() {
if(blogId !== undefined) {
task.chain(publish);
return;
}
$.ajax({
url: "https://www.googleapis.com/blogger/v3/blogs/byurl",
data: {
url: blogUrl
},
headers: headers,
dataType: "json",
timeout: AJAX_TIMEOUT
}).done(function(blog, textStatus, jqXHR) {
blogId = blog.id;
task.chain(publish);
}).fail(function(jqXHR) {
var error = {
code: jqXHR.status,
message: jqXHR.statusText
};
// Handle error
if(error.code === 404) {
error = 'Blog "' + blogUrl + '" not found on Blogger.|removePublish';
}
handleError(error, task);
});
}
task.chain(getBlogId);
});
task.onSuccess(function() {
callback(undefined, blogId, postId);
});
task.onError(function(error) {
callback(error);
});
asyncRunner.addTask(task);
};
return googleHelper;
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});