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118 lines
3.5 KiB
JavaScript
118 lines
3.5 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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window.gapi.client.setApiKey(this.apiKey)
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window.gapi.client.load('drive', 'v2', this._driveApiLoaded.bind(this))
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window.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 = window.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 = window.gapi.auth.getToken().access_token
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var view = new window.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 window.google.picker.PickerBuilder()
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.enableFeature(window.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[window.google.picker.Response.ACTION] === window.google.picker.Action.PICKED) {
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var file = data[window.google.picker.Response.DOCUMENTS][0]
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var id = file[window.google.picker.Document.ID]
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var request = window.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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window.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 || function () {})
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}
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}
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}())
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