120 lines
3.1 KiB
JavaScript
120 lines
3.1 KiB
JavaScript
/**!
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* Google Drive File Picker Example
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* By Daniel Lo Nigro (http://dan.cx/)
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*/
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(function() {
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/**
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* Initialise a Google Driver file picker
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*/
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var FilePicker = window.FilePicker = function(options) {
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// Config
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this.apiKey = options.apiKey;
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this.clientId = options.clientId;
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// Elements
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this.buttonEl = options.buttonEl;
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// Events
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this.onSelect = options.onSelect;
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this.buttonEl.on('click', this.open.bind(this));
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// Disable the button until the API loads, as it won't work properly until then.
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this.buttonEl.prop('disabled', true);
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// Load the drive API
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gapi.client.setApiKey(this.apiKey);
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gapi.client.load('drive', 'v2', this._driveApiLoaded.bind(this));
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google.load('picker', '1', { callback: this._pickerApiLoaded.bind(this) });
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}
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FilePicker.prototype = {
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/**
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* Open the file picker.
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*/
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open: function() {
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// Check if the user has already authenticated
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var token = gapi.auth.getToken();
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if (token) {
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this._showPicker();
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} else {
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// The user has not yet authenticated with Google
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// We need to do the authentication before displaying the Drive picker.
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this._doAuth(false, function() { this._showPicker(); }.bind(this));
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}
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},
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/**
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* Show the file picker once authentication has been done.
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* @private
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*/
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_showPicker: function() {
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var accessToken = gapi.auth.getToken().access_token;
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var view = new google.picker.DocsView();
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view.setMimeTypes("text/markdown,text/html");
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view.setIncludeFolders(true);
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view.setOwnedByMe(true);
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this.picker = new google.picker.PickerBuilder().
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enableFeature(google.picker.Feature.NAV_HIDDEN).
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addView(view).
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setAppId(this.clientId).
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setOAuthToken(accessToken).
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setCallback(this._pickerCallback.bind(this)).
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build().
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setVisible(true);
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},
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/**
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* Called when a file has been selected in the Google Drive file picker.
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* @private
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*/
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_pickerCallback: function(data) {
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if (data[google.picker.Response.ACTION] == google.picker.Action.PICKED) {
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var file = data[google.picker.Response.DOCUMENTS][0],
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id = file[google.picker.Document.ID],
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request = gapi.client.drive.files.get({
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fileId: id
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});
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request.execute(this._fileGetCallback.bind(this));
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}
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},
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/**
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* Called when file details have been retrieved from Google Drive.
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* @private
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*/
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_fileGetCallback: function(file) {
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if (this.onSelect) {
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this.onSelect(file);
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}
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},
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/**
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* Called when the Google Drive file picker API has finished loading.
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* @private
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*/
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_pickerApiLoaded: function() {
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this.buttonEl.prop('disabled', false);
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},
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/**
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* Called when the Google Drive API has finished loading.
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* @private
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*/
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_driveApiLoaded: function() {
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this._doAuth(true);
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},
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/**
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* Authenticate with Google Drive via the Google JavaScript API.
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* @private
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*/
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_doAuth: function(immediate, callback) {
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gapi.auth.authorize({
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client_id: this.clientId,
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scope: 'https://www.googleapis.com/auth/drive.readonly',
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immediate: immediate
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}, callback ? callback : function() {});
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}
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};
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}());
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