Stackedit/js/google-helper.js

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define(["jquery", "core", "utils", "async-runner"], function($, core, utils, asyncRunner) {
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var connected = false;
var authenticated = false;
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var googleHelper = {};
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// Try to connect Gdrive by downloading client.js
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function connect(task) {
task.onRun(function() {
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if(core.isOffline === true) {
connected = false;
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task.error(new Error("Operation not available in offline mode.|stopPublish"));
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return;
}
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if (connected === true) {
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task.chain();
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return;
}
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delayedFunction = function() {
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connected = true;
task.chain();
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};
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$.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(jqXHR) {
var error = {
code: jqXHR.status,
message: jqXHR.statusText
};
handleError(error, task);
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});
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});
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}
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// Try to authenticate with Oauth
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function authenticate(task) {
task.onRun(function() {
if (authenticated === true) {
task.chain();
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return;
}
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var immediate = true;
function localAuthenticate() {
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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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// If not immediate we add time for user to enter his credentials
task.timeout = ASYNC_TASK_LONG_TIMEOUT;
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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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gapi.client.load('drive', 'v2', function() {
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if (!authResult || authResult.error) {
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// If immediate did not work retry without immediate flag
if (connected === true && immediate === true) {
immediate = false;
task.chain(localAuthenticate);
return;
}
// Error
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task.error(new Error("Access to Google account is not authorized."));
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return;
}
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// Success
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authenticated = true;
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task.chain();
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});
});
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}
task.chain(localAuthenticate);
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});
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}
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googleHelper.upload = function(fileId, parentId, title, content, etag, callback) {
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callback = callback || core.doNothing;
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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 + '"', };
if(etag !== undefined) {
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// Sometimes we have error 412 from Google even with the correct etag
//headers["If-Match"] = etag;
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}
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var base64Data = utils.encodeBase64(content);
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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;
task.chain();
return;
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}
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var error = response.error;
// Handle error
if(error !== undefined && fileId !== undefined) {
if(error.code === 404) {
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error = 'File ID "' + fileId + '" not found on Google Drive.|removePublish';
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}
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else if(error.code === 412) {
// We may have missed a file update
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localStorage.removeItem("gdrive.lastChangeId");
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error = 'Conflict on file ID "' + fileId + '". Please restart the synchronization.';
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}
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}
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handleError(error, task);
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});
});
task.onSuccess(function() {
callback(undefined, result);
});
task.onError(function(error) {
callback(error);
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});
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asyncRunner.addTask(task);
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};
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googleHelper.checkChanges = function(lastChangeId, callback) {
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callback = callback || core.doNothing;
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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
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handleError(response.error, task);
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return;
}
// Retrieve success
newChangeId = response.largestChangeId;
nextPageToken = response.nextPageToken;
if (response.items !== undefined) {
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changes = changes.concat(response.items);
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}
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if (nextPageToken !== undefined) {
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task.chain(retrievePageOfChanges);
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}
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else {
task.chain();
}
});
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}
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task.chain(retrievePageOfChanges);
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});
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task.onSuccess(function() {
callback(undefined, changes, newChangeId);
});
task.onError(function(error) {
callback(error);
});
asyncRunner.addTask(task);
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};
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googleHelper.downloadMetadata = function(ids, callback, skipAuth) {
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callback = callback || core.doNothing;
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var result = [];
var task = asyncRunner.createTask();
connect(task);
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if(!skipAuth) {
authenticate(task);
}
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task.onRun(function() {
function recursiveDownloadMetadata() {
if(ids.length === 0) {
task.chain();
return;
}
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var id = ids[0];
var headers = {};
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var token = gapi.auth.getToken();
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if(token) {
headers.Authorization = "Bearer " + token.access_token;
}
$.ajax({
url : "https://www.googleapis.com/drive/v2/files/" + id,
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headers : headers,
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data : {key: GOOGLE_API_KEY},
dataType : "json",
timeout : AJAX_TIMEOUT
}).done(function(data, textStatus, jqXHR) {
result.push(data);
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ids.shift();
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task.chain(recursiveDownloadMetadata);
}).fail(function(jqXHR) {
var error = {
code: jqXHR.status,
message: jqXHR.statusText
};
// Handle error
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if(error.code === 404) {
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error = 'File ID "' + id + '" not found on Google Drive.';
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}
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handleError(error, task);
});
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}
task.chain(recursiveDownloadMetadata);
});
task.onSuccess(function() {
callback(undefined, result);
});
task.onError(function(error) {
callback(error);
});
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asyncRunner.addTask(task);
};
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googleHelper.downloadContent = function(objects, callback, skipAuth) {
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callback = callback || core.doNothing;
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var result = [];
var task = asyncRunner.createTask();
// Add some time for user to choose his files
task.timeout = ASYNC_TASK_LONG_TIMEOUT;
connect(task);
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if(!skipAuth) {
authenticate(task);
}
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task.onRun(function() {
function recursiveDownloadContent() {
if(objects.length === 0) {
task.chain();
return;
}
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var object = objects[0];
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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) {
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objects.shift();
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task.chain(recursiveDownloadContent);
return;
}
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var headers = {};
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var token = gapi.auth.getToken();
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if(token) {
headers.Authorization = "Bearer " + token.access_token;
}
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$.ajax({
url : file.downloadUrl,
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headers : headers,
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data : {key: GOOGLE_API_KEY},
dataType : "text",
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timeout : AJAX_TIMEOUT
}).done(function(data, textStatus, jqXHR) {
file.content = data;
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objects.shift();
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task.chain(recursiveDownloadContent);
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}).fail(function(jqXHR) {
var error = {
code: jqXHR.status,
message: jqXHR.statusText
};
// Handle error
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handleError(error, task);
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});
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}
task.chain(recursiveDownloadContent);
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});
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task.onSuccess(function() {
callback(undefined, result);
});
task.onError(function(error) {
callback(error);
});
asyncRunner.addTask(task);
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};
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function handleError(error, task) {
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var errorMsg = undefined;
if (error) {
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console.error(error);
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// Try to analyze the error
if (typeof error === "string") {
errorMsg = error;
}
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else {
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errorMsg = "Google error (" + error.code + ": "
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+ error.message + ").";
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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";
}
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}
}
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task.error(new Error(errorMsg));
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}
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var pickerLoaded = false;
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function loadPicker(task) {
task.onRun(function() {
if (pickerLoaded === true) {
task.chain();
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return;
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}
$.ajax({
url : "//www.google.com/jsapi",
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data : {key: GOOGLE_API_KEY},
dataType : "script",
timeout : AJAX_TIMEOUT
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}).done(function() {
google.load('picker', '1', {callback: task.chain});
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pickerLoaded = true;
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}).fail(function(jqXHR) {
var error = {
code: jqXHR.status,
message: jqXHR.statusText
};
handleError(error, task);
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});
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});
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}
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googleHelper.picker = function(callback) {
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callback = callback || core.doNothing;
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var ids = [];
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var picker = undefined;
function hidePicker() {
if(picker !== undefined) {
picker.setVisible(false);
$(".modal-backdrop, .picker").remove();
}
}
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var task = asyncRunner.createTask();
connect(task);
loadPicker(task);
task.onRun(function() {
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var view = new google.picker.View(google.picker.ViewId.DOCS);
view.setMimeTypes("text/x-markdown,text/plain,application/octet-stream");
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var pickerBuilder = new google.picker.PickerBuilder();
pickerBuilder.enableFeature(google.picker.Feature.NAV_HIDDEN);
pickerBuilder.enableFeature(google.picker.Feature.MULTISELECT_ENABLED);
pickerBuilder.setAppId(GOOGLE_DRIVE_APP_ID);
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var token = gapi.auth.getToken();
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if(token) {
pickerBuilder.setOAuthToken(token.access_token);
}
pickerBuilder.addView(view);
pickerBuilder.addView(new google.picker.DocsUploadView());
pickerBuilder.setCallback(function(data) {
if (data.action == google.picker.Action.PICKED ||
data.action == google.picker.Action.CANCEL) {
if(data.action == google.picker.Action.PICKED) {
for(var i=0; i<data.docs.length; i++) {
ids.push(data.docs[i].id);
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}
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}
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hidePicker();
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task.chain();
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}
});
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picker = pickerBuilder.build();
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$("body").append($("<div>").addClass("modal-backdrop").click(function() {
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hidePicker();
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task.chain();
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}));
picker.setVisible(true);
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});
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task.onSuccess(function() {
callback(undefined, ids);
});
task.onError(function(error) {
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hidePicker();
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callback(error);
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});
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asyncRunner.addTask(task);
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};
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googleHelper.uploadBlogger = function(blogUrl, blogId, postId, labelList, title, content, callback) {
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var task = asyncRunner.createTask();
connect(task);
authenticate(task);
task.onRun(function() {
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var headers = {};
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var token = gapi.auth.getToken();
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if(token) {
headers.Authorization = "Bearer " + token.access_token;
}
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function publish() {
var url = "https://www.googleapis.com/blogger/v3/blogs/" + blogId + "/posts/";
var data = {
kind: "blogger#post",
blog: { id: blogId },
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labels: labelList,
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title: title,
content: content
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};
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var type = "POST";
// If it's an update
if(postId !== undefined) {
url += postId;
data.id = postId;
type = "PUT";
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}
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$.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
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};
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// Handle error
if(error.code === 404 && postId !== undefined) {
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error = 'Post ' + postId + ' not found on Blogger.|removePublish';
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}
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handleError(error, task);
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});
}
function getBlogId() {
if(blogId !== undefined) {
task.chain(publish);
return;
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}
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$.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) {
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error = 'Blog "' + blogUrl + '" not found on Blogger.|removePublish';
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}
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handleError(error, task);
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});
}
task.chain(getBlogId);
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});
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task.onSuccess(function() {
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callback(undefined, blogId, postId);
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});
task.onError(function(error) {
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callback(error);
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});
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asyncRunner.addTask(task);
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};
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return googleHelper;
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});