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/**
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* @file js/controllers/UploaderHandler.js
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*
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* Copyright (c) 2014-2021 Simon Fraser University
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* Copyright (c) 2000-2021 John Willinsky
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* Distributed under the GNU GPL v3. For full terms see the file docs/COPYING.
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*
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* @class UploaderHandler
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* @ingroup js_controllers
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*
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* @brief PKP file uploader widget handler.
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*/
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(function($) {
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/**
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* @constructor
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*
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* @extends $.pkp.classes.Handler
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*
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* @param {jQueryObject} $uploader the wrapped HTML uploader element.
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* @param {{
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* uploadUrl: string,
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* baseUrl: string
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* }} options options to be passed
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* into the validator plug-in.
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*/
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$.pkp.controllers.UploaderHandler = function($uploader, options) {
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this.parent($uploader, options);
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// Check whether we really got a div to attach
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// our uploader to.
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if (!$uploader.is('div')) {
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throw new Error(['An uploader widget controller can only be attached',
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' to a div!'].join(''));
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}
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var uploaderOptions,
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pluploaderId,
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$browseButton,
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self;
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// Set up options to pass to plupload
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uploaderOptions = {
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url: options.uploadUrl,
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// Flash settings
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flash_swf_url: options.baseUrl +
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'/lib/pkp/lib/vendor/moxiecode/plupload/js/Moxie.swf',
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// Silverlight settings
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silverlight_xap_url: options.baseUrl +
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'/lib/pkp/lib/vendor/moxiecode/plupload/js/Moxie.xap'
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};
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if (typeof options.filters) {
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uploaderOptions.filters = options.filters;
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}
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if (typeof options.resize) {
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uploaderOptions.resize = options.resize;
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}
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if (typeof options.browse_button) {
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uploaderOptions.browse_button = options.browse_button;
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}
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if (typeof options.multipart_params) {
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uploaderOptions.multipart_params = options.multipart_params;
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}
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uploaderOptions.drop_element = $uploader.first().find('#' +
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$uploader.first().attr('id') +
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'-pkpUploaderDropZone').attr('id');
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uploaderOptions = $.extend(
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{},
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this.self('DEFAULT_PROPERTIES_'),
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uploaderOptions
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);
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// Create the uploader with the puploader plug-in.
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// Setup the upload widget.
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this.pluploader = new plupload.Uploader(uploaderOptions);
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this.pluploader.init();
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this.updateStatus('waiting');
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// Cache re-used DOM references
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this.$progress = $uploader.find('.pkpUploaderProgress .percentage');
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this.$progressBar = $uploader.find('.pkpUploaderProgressBar');
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this.$fileName = $uploader.find('.pkpUploaderFilename');
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// Bind to the pluploader for some configuration
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this.pluploader.bind('FilesAdded',
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this.callbackWrapper(this.startUpload));
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this.pluploader.bind('UploadProgress',
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this.callbackWrapper(this.updateProgress));
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this.pluploader.bind('Error',
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this.callbackWrapper(this.handleError));
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this.pluploader.bind('FileUploaded',
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this.callbackWrapper(this.uploadComplete));
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this.pluploader.bind('QueueChanged',
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this.callbackWrapper(this.refreshUploader));
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// Ensure clicks on the visual button don't attempt to submit the form
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$browseButton = $('#' + uploaderOptions.browse_button, this.getHtmlElement());
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$browseButton.click(function(e) {
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return false;
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});
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this.pluploader.refresh();
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// Fake a focus effect on the visual button when plupload's hidden
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// button is focused
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self = this;
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setTimeout(function() {
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self.getHtmlElement().find('.moxie-shim input')
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.focus(function(e) {
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$browseButton.addClass('in_focus');
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})
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.blur(function(e) {
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$browseButton.removeClass('in_focus');
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});
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}, 100);
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};
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$.pkp.classes.Helper.inherits(
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$.pkp.controllers.UploaderHandler, $.pkp.classes.Handler);
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//
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// Public methods
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//
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/**
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* Initiate upload of a file
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* @param {Object} caller The original context in which the callback was called.
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* @param {Object} pluploader The pluploader object.
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* @param {Object} file The data of the uploaded file.
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*
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*/
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$.pkp.controllers.UploaderHandler.prototype.
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startUpload = function(caller, pluploader, file) {
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// Prevent > 1 files from being added.
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if (pluploader.files.length > 1) {
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pluploader.removeFile(pluploader.files[0]);
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}
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// Initiate the upload process
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this.updateStatus('uploading');
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pluploader.start();
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};
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/**
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* Update the progress indicator for a file
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* @param {Object} caller The original context in which the callback was called.
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* @param {Object} pluploader The pluploader object.
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* @param {Object} file The data of the uploaded file.
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*
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*/
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$.pkp.controllers.UploaderHandler.prototype.
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updateProgress = function(caller, pluploader, file) {
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this.$progress.html(file.percent);
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this.$progressBar.css('width', file.percent + '%');
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};
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/**
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* Indicate the file upload has completed
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* @param {Object} caller The original context in which the callback was called.
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* @param {Object} pluploader The pluploader object.
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* @param {Object} file The data of the uploaded file.
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* @param {{response: string}} response
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*/
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$.pkp.controllers.UploaderHandler.prototype.
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uploadComplete = function(caller, pluploader, file, response) {
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var jsonData = $.parseJSON(response.response), filename = file.name;
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if (!jsonData.status) {
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this.showError(jsonData.content);
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return;
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}
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if (typeof jsonData.uploadedFile !== 'undefined') {
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filename = jsonData.uploadedFile.name || jsonData.uploadedFile.fileLabel;
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// Store uploaded file data so that it can be referenced during
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// other API events. This is used by the submission file wizard
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// to delete files that are uploaded then replaced before submission
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// is complete.
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//
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// See: $.pkp.controllers.wizard.fileUpload.FileUploadWizardHandler.
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// prototype.handleRemovedFiles
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file.storedData = jsonData.uploadedFile;
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}
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this.$fileName.html(filename);
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this.updateStatus('complete');
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this.$progress.html('0');
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this.$progressBar.css('width', 0);
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};
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/**
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* Handle error revents from plupload
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* @param {Object} caller The original context in which the callback was called.
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* @param {Object} pluploader The pluploader object.
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* @param {{message: string}} err An object describing an error condition
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*
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*/
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$.pkp.controllers.UploaderHandler.prototype.
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handleError = function(caller, pluploader, err) {
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this.showError(err.message);
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};
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/**
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* Display an error if encountered during upload
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* @param {string} msg The error message
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*
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*/
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$.pkp.controllers.UploaderHandler.prototype.
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showError = function(msg) {
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this.$progress.html('0');
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this.$progressBar.css('width', 0);
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this.updateStatus('error');
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this.getHtmlElement().find('.pkpUploaderError').html(msg);
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};
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/**
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* Refresh the uploader interface so buttons work correctly.
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* @param {Object} caller The original context in which the callback was called.
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* @param {Object} pluploader The pluploader object.
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* @param {Object} file The data of the uploaded file.
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*
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*/
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$.pkp.controllers.UploaderHandler.prototype.
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refreshUploader = function(caller, pluploader, file) {
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pluploader.refresh();
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};
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/**
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* Update the status of the element in the DOM
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* @param {string} status The new status
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*
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*/
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$.pkp.controllers.UploaderHandler.prototype.
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updateStatus = function(status) {
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this.getHtmlElement().removeClass('loading waiting uploading error complete')
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.addClass(status);
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};
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//
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// Private static properties
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//
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/**
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* Default options
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* @private
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* @type {Object}
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* @const
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*/
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$.pkp.controllers.UploaderHandler.DEFAULT_PROPERTIES_ = {
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runtimes: 'html5,flash,silverlight,html4',
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max_file_size: $.pkp.cons.UPLOAD_MAX_FILESIZE,
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multi_selection: false,
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file_data_name: 'uploadedFile',
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multipart: true,
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headers: {'browser_user_agent': navigator.userAgent},
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browse_button: 'pkpUploaderButton'
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};
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}(jQuery));
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