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// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Javascript library for enableing a drag and drop upload to courses
*
* @package core
* @subpackage course
* @copyright 2012 Davo Smith
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
M.course_dndupload = {
// YUI object.
Y: null,
// URL for upload requests
url: M.cfg.wwwroot + '/course/dndupload.php',
// maximum size of files allowed in this form
maxbytes: 0,
// ID of the course we are on
courseid: null,
// Data about the different file/data handlers that are available
handlers: null,
// Nasty hack to distinguish between dragenter(first entry),
// dragenter+dragleave(moving between child elements) and dragleave (leaving element)
entercount: 0,
// Used to keep track of the section we are dragging across - to make
// spotting movement between sections more reliable
currentsection: null,
// Used to store the pending uploads whilst the user is being asked for further input
uploadqueue: null,
// True if the there is currently a dialog being shown (asking for a name, or giving a
// choice of file handlers)
uploaddialog: false,
// An array containing the last selected file handler for each file type
lastselected: null,
// The following are used to identify specific parts of the course page
// The type of HTML element that is a course section
sectiontypename: 'li',
// The classes that an element must have to be identified as a course section
sectionclasses: ['section', 'main'],
// The ID of the main content area of the page (for adding the 'status' div)
pagecontentid: 'page',
// The selector identifying the list of modules within a section (note changing this may require
// changes to the get_mods_element function)
modslistselector: 'ul.section',
// Original onbeforeunload event.
originalUnloadEvent: null,
/**
* Initalise the drag and drop upload interface
* Note: one and only one of options.filemanager and options.formcallback must be defined
*
* @param Y the YUI object
* @param object options {
* courseid: ID of the course we are on
* maxbytes: maximum size of files allowed in this form
* handlers: Data about the different file/data handlers that are available
* }
*/
init: function(Y, options) {
this.Y = Y;
if (!this.browser_supported()) {
return; // Browser does not support the required functionality
}
this.maxbytes = options.maxbytes;
this.courseid = options.courseid;
this.handlers = options.handlers;
this.uploadqueue = new Array();
this.lastselected = new Array();
var sectionselector = this.sectiontypename + '.' + this.sectionclasses.join('.');
var sections = this.Y.all(sectionselector);
if (sections.isEmpty()) {
return; // No sections - incompatible course format or front page.
}
sections.each( function(el) {
this.add_preview_element(el);
this.init_events(el);
}, this);
if (options.showstatus) {
this.add_status_div();
}
},
/**
* Add a div element to tell the user that drag and drop upload
* is available (or to explain why it is not available)
*/
add_status_div: function() {
var Y = this.Y,
coursecontents = Y.one('#' + this.pagecontentid),
div,
handlefile = (this.handlers.filehandlers.length > 0),
handletext = false,
handlelink = false,
i = 0,
styletop,
styletopunit;
if (!coursecontents) {
return;
}
div = Y.Node.create('<div id="dndupload-status"></div>').setStyle('opacity', '0.0');
coursecontents.insert(div, 0);
for (i = 0; i < this.handlers.types.length; i++) {
switch (this.handlers.types[i].identifier) {
case 'text':
case 'text/html':
handletext = true;
break;
case 'url':
handlelink = true;
break;
}
}
$msgident = 'dndworking';
if (handlefile) {
$msgident += 'file';
}
if (handletext) {
$msgident += 'text';
}
if (handlelink) {
$msgident += 'link';
}
div.setContent(M.util.get_string($msgident, 'moodle'));
styletop = div.getStyle('top') || '0px';
styletopunit = styletop.replace(/^\d+/, '');
styletop = parseInt(styletop.replace(/\D*$/, ''), 10);
var fadein = new Y.Anim({
node: '#dndupload-status',
from: {
opacity: 0.0,
top: (styletop - 30).toString() + styletopunit
},
to: {
opacity: 1.0,
top: styletop.toString() + styletopunit
},
duration: 0.5
});
var fadeout = new Y.Anim({
node: '#dndupload-status',
from: {
opacity: 1.0,
top: styletop.toString() + styletopunit
},
to: {
opacity: 0.0,
top: (styletop - 30).toString() + styletopunit
},
duration: 0.5
});
fadein.run();
fadein.on('end', function(e) {
Y.later(3000, this, function() {
fadeout.run();
});
});
fadeout.on('end', function(e) {
Y.one('#dndupload-status').remove(true);
});
},
/**
* Check the browser has the required functionality
* @return true if browser supports drag/drop upload
*/
browser_supported: function() {
if (typeof FileReader == 'undefined') {
return false;
}
if (typeof FormData == 'undefined') {
return false;
}
return true;
},
/**
* Initialise drag events on node container, all events need
* to be processed for drag and drop to work
* @param el the element to add events to
*/
init_events: function(el) {
this.Y.on('dragenter', this.drag_enter, el, this);
this.Y.on('dragleave', this.drag_leave, el, this);
this.Y.on('dragover', this.drag_over, el, this);
this.Y.on('drop', this.drop, el, this);
},
/**
* Work out which course section a given element is in
* @param el the child DOM element within the section
* @return the DOM element representing the section
*/
get_section: function(el) {
var sectionclasses = this.sectionclasses;
return el.ancestor( function(test) {
var i;
for (i=0; i<sectionclasses.length; i++) {
if (!test.hasClass(sectionclasses[i])) {
return false;
}
return true;
}
}, true);
},
/**
* Work out the number of the section we have been dropped on to, from the section element
* @param DOMElement section the selected section
* @return int the section number
*/
get_section_number: function(section) {
var sectionid = section.get('id').split('-');
if (sectionid.length < 2 || sectionid[0] != 'section') {
return false;
}
return parseInt(sectionid[1]);
},
/**
* Check if the event includes data of the given type
* @param e the event details
* @param type the data type to check for
* @return true if the data type is found in the event data
*/
types_includes: function(e, type) {
var i;
var types = e._event.dataTransfer.types;
type = type.toLowerCase();
for (i=0; i<types.length; i++) {
if (!types.hasOwnProperty(i)) {
continue;
}
if (types[i].toLowerCase() === type) {
return true;
}
}
return false;
},
/**
* Look through the event data, checking it against the registered data types
* (in order of priority) and return details of the first matching data type
* @param e the event details
* @return object|false - false if not found or an object {
* realtype: the type as given by the browser
* addmessage: the message to show to the user during dragging
* namemessage: the message for requesting a name for the resource from the user
* type: the identifier of the type (may match several 'realtype's)
* }
*/
drag_type: function(e) {
// Check there is some data attached.
if (e._event.dataTransfer === null) {
return false;
}
if (e._event.dataTransfer.types === null) {
return false;
}
if (e._event.dataTransfer.types.length == 0) {
return false;
}
// Check for files first.
if (this.types_includes(e, 'Files')) {
if (e.type != 'drop' || e._event.dataTransfer.files.length != 0) {
if (this.handlers.filehandlers.length == 0) {
return false; // No available file handlers - ignore this drag.
}
return {
realtype: 'Files',
addmessage: M.util.get_string('addfilehere', 'moodle'),
namemessage: null, // Should not be asked for anyway
type: 'Files'
};
}
}
// Check each of the registered types.
var types = this.handlers.types;
for (var i=0; i<types.length; i++) {
// Check each of the different identifiers for this type
var dttypes = types[i].datatransfertypes;
for (var j=0; j<dttypes.length; j++) {
if (this.types_includes(e, dttypes[j])) {
return {
realtype: dttypes[j],
addmessage: types[i].addmessage,
namemessage: types[i].namemessage,
handlermessage: types[i].handlermessage,
type: types[i].identifier,
handlers: types[i].handlers
};
}
}
}
return false; // No types we can handle
},
/**
* Check the content of the drag/drop includes a type we can handle, then, if
* it is, notify the browser that we want to handle it
* @param event e
* @return string type of the event or false
*/
check_drag: function(e) {
var type = this.drag_type(e);
if (type) {
// Notify browser that we will handle this drag/drop
e.stopPropagation();
e.preventDefault();
}
return type;
},
/**
* Handle a dragenter event: add a suitable 'add here' message
* when a drag event occurs, containing a registered data type
* @param e event data
* @return false to prevent the event from continuing to be processed
*/
drag_enter: function(e) {
if (!(type = this.check_drag(e))) {
return false;
}
var section = this.get_section(e.currentTarget);
if (!section) {
return false;
}
if (this.currentsection && this.currentsection != section) {
this.currentsection = section;
this.entercount = 1;
} else {
this.entercount++;
if (this.entercount > 2) {
this.entercount = 2;
return false;
}
}
this.show_preview_element(section, type);
return false;
},
/**
* Handle a dragleave event: remove the 'add here' message (if present)
* @param e event data
* @return false to prevent the event from continuing to be processed
*/
drag_leave: function(e) {
if (!this.check_drag(e)) {
return false;
}
this.entercount--;
if (this.entercount == 1) {
return false;
}
this.entercount = 0;
this.currentsection = null;
this.hide_preview_element();
return false;
},
/**
* Handle a dragover event: just prevent the browser default (necessary
* to allow drag and drop handling to work)
* @param e event data
* @return false to prevent the event from continuing to be processed
*/
drag_over: function(e) {
this.check_drag(e);
return false;
},
/**
* Handle a drop event: hide the 'add here' message, check the attached
* data type and start the upload process
* @param e event data
* @return false to prevent the event from continuing to be processed
*/
drop: function(e) {
this.hide_preview_element();
if (!(type = this.check_drag(e))) {
return false;
}
// Work out the number of the section we are on (from its id)
var section = this.get_section(e.currentTarget);
var sectionnumber = this.get_section_number(section);
// Process the file or the included data
if (type.type == 'Files') {
var files = e._event.dataTransfer.files;
for (var i=0, f; f=files[i]; i++) {
this.handle_file(f, section, sectionnumber);
}
} else {
var contents = e._event.dataTransfer.getData(type.realtype);
if (contents) {
this.handle_item(type, contents, section, sectionnumber);
}
}
return false;
},
/**
* Find or create the 'ul' element that contains all of the module
* instances in this section
* @param section the DOM element representing the section
* @return false to prevent the event from continuing to be processed
*/
get_mods_element: function(section) {
// Find the 'ul' containing the list of mods
var modsel = section.one(this.modslistselector);
if (!modsel) {
// Create the above 'ul' if it doesn't exist
modsel = document.createElement('ul');
modsel.className = 'section img-text';
var contentel = section.get('children').pop();
var brel = contentel.get('children').pop();
contentel.insertBefore(modsel, brel);
modsel = this.Y.one(modsel);
}
return modsel;
},
/**
* Add a new dummy item to the list of mods, to be replaced by a real
* item & link once the AJAX upload call has completed
* @param name the label to show in the element
* @param section the DOM element reperesenting the course section
* @return DOM element containing the new item
*/
add_resource_element: function(name, section, module) {
var modsel = this.get_mods_element(section);
var resel = {
parent: modsel,
li: document.createElement('li'),
div: document.createElement('div'),
indentdiv: document.createElement('div'),
a: document.createElement('a'),
icon: document.createElement('img'),
namespan: document.createElement('span'),
groupingspan: document.createElement('span'),
progressouter: document.createElement('span'),
progress: document.createElement('span')
};
resel.li.className = 'activity ' + module + ' modtype_' + module;
resel.indentdiv.className = 'mod-indent';
resel.li.appendChild(resel.indentdiv);
resel.div.className = 'activityinstance';
resel.indentdiv.appendChild(resel.div);
resel.a.href = '#';
resel.div.appendChild(resel.a);
resel.icon.src = M.util.image_url('i/ajaxloader');
resel.icon.className = 'activityicon iconlarge';
resel.a.appendChild(resel.icon);
resel.namespan.className = 'instancename';
resel.namespan.innerHTML = name;
resel.a.appendChild(resel.namespan);
resel.groupingspan.className = 'groupinglabel';
resel.div.appendChild(resel.groupingspan);
resel.progressouter.className = 'dndupload-progress-outer';
resel.progress.className = 'dndupload-progress-inner';
resel.progress.innerHTML = ' ';
resel.progressouter.appendChild(resel.progress);
resel.div.appendChild(resel.progressouter);
modsel.insertBefore(resel.li, modsel.get('children').pop()); // Leave the 'preview element' at the bottom
return resel;
},
/**
* Hide any visible dndupload-preview elements on the page
*/
hide_preview_element: function() {
this.Y.all('li.dndupload-preview').addClass('dndupload-hidden');
this.Y.all('.dndupload-over').removeClass('dndupload-over');
},
/**
* Unhide the preview element for the given section and set it to display
* the correct message
* @param section the YUI node representing the selected course section
* @param type the details of the data type detected in the drag (including the message to display)
*/
show_preview_element: function(section, type) {
this.hide_preview_element();
var preview = section.one('li.dndupload-preview').removeClass('dndupload-hidden');
section.addClass('dndupload-over');
// Horrible work-around to allow the 'Add X here' text to be a drop target in Firefox.
var node = preview.one('span').getDOMNode();
node.firstChild.nodeValue = type.addmessage;
},
/**
* Add the preview element to a course section. Note: this needs to be done before 'addEventListener'
* is called, otherwise Firefox will ignore events generated when the mouse is over the preview
* element (instead of passing them up to the parent element)
* @param section the YUI node representing the selected course section
*/
add_preview_element: function(section) {
var modsel = this.get_mods_element(section);
var preview = {
li: document.createElement('li'),
div: document.createElement('div'),
icon: document.createElement('img'),
namespan: document.createElement('span')
};
preview.li.className = 'dndupload-preview dndupload-hidden';
preview.div.className = 'mod-indent';
preview.li.appendChild(preview.div);
preview.icon.src = M.util.image_url('t/addfile');
preview.icon.className = 'icon';
preview.div.appendChild(preview.icon);
preview.div.appendChild(document.createTextNode(' '));
preview.namespan.className = 'instancename';
preview.namespan.innerHTML = M.util.get_string('addfilehere', 'moodle');
preview.div.appendChild(preview.namespan);
modsel.appendChild(preview.li);
},
/**
* Find the registered handler for the given file type. If there is more than one, ask the
* user which one to use. Then upload the file to the server
* @param file the details of the file, taken from the FileList in the drop event
* @param section the DOM element representing the selected course section
* @param sectionnumber the number of the selected course section
*/
handle_file: function(file, section, sectionnumber) {
var handlers = new Array();
var filehandlers = this.handlers.filehandlers;
var extension = '';
var dotpos = file.name.lastIndexOf('.');
if (dotpos != -1) {
extension = file.name.substr(dotpos+1, file.name.length).toLowerCase();
}
for (var i=0; i<filehandlers.length; i++) {
if (filehandlers[i].extension == '*' || filehandlers[i].extension == extension) {
handlers.push(filehandlers[i]);
}
}
if (handlers.length == 0) {
// No handlers at all (not even 'resource'?)
return;
}
if (handlers.length == 1) {
this.upload_file(file, section, sectionnumber, handlers[0].module);
return;
}
this.file_handler_dialog(handlers, extension, file, section, sectionnumber);
},
/**
* Show a dialog box, allowing the user to choose what to do with the file they are uploading
* @param handlers the available handlers to choose between
* @param extension the extension of the file being uploaded
* @param file the File object being uploaded
* @param section the DOM element of the section being uploaded to
* @param sectionnumber the number of the selected course section
*/
file_handler_dialog: function(handlers, extension, file, section, sectionnumber) {
if (this.uploaddialog) {
var details = new Object();
details.isfile = true;
details.handlers = handlers;
details.extension = extension;
details.file = file;
details.section = section;
details.sectionnumber = sectionnumber;
this.uploadqueue.push(details);
return;
}
this.uploaddialog = true;
var timestamp = new Date().getTime();
var uploadid = Math.round(Math.random()*100000)+'-'+timestamp;
var content = '';
var sel;
if (extension in this.lastselected) {
sel = this.lastselected[extension];
} else {
sel = handlers[0].module;
}
content += '<p>'+M.util.get_string('actionchoice', 'moodle', file.name)+'</p>';
content += '<div id="dndupload_handlers'+uploadid+'">';
for (var i=0; i<handlers.length; i++) {
var id = 'dndupload_handler'+uploadid+handlers[i].module;
var checked = (handlers[i].module == sel) ? 'checked="checked" ' : '';
content += '<input type="radio" name="handler" value="'+handlers[i].module+'" id="'+id+'" '+checked+'/>';
content += ' <label for="'+id+'">';
content += handlers[i].message;
content += '</label><br/>';
}
content += '</div>';
var Y = this.Y;
var self = this;
var panel = new M.core.dialogue({
bodyContent: content,
width: '350px',
modal: true,
visible: false,
render: true,
align: {
node: null,
points: [Y.WidgetPositionAlign.CC, Y.WidgetPositionAlign.CC]
}
});
panel.show();
// When the panel is hidden - destroy it and then check for other pending uploads
panel.after("visibleChange", function(e) {
if (!panel.get('visible')) {
panel.destroy(true);
self.check_upload_queue();
}
});
// Add the submit/cancel buttons to the bottom of the dialog.
panel.addButton({
label: M.util.get_string('upload', 'moodle'),
action: function(e) {
e.preventDefault();
// Find out which module was selected
var module = false;
var div = Y.one('#dndupload_handlers'+uploadid);
div.all('input').each(function(input) {
if (input.get('checked')) {
module = input.get('value');
}
});
if (!module) {
return;
}
panel.hide();
// Remember this selection for next time
self.lastselected[extension] = module;
// Do the upload
self.upload_file(file, section, sectionnumber, module);
},
section: Y.WidgetStdMod.FOOTER
});
panel.addButton({
label: M.util.get_string('cancel', 'moodle'),
action: function(e) {
e.preventDefault();
panel.hide();
},
section: Y.WidgetStdMod.FOOTER
});
},
/**
* Check to see if there are any other dialog boxes to show, now that the current one has
* been dealt with
*/
check_upload_queue: function() {
this.uploaddialog = false;
if (this.uploadqueue.length == 0) {
return;
}
var details = this.uploadqueue.shift();
if (details.isfile) {
this.file_handler_dialog(details.handlers, details.extension, details.file, details.section, details.sectionnumber);
} else {
this.handle_item(details.type, details.contents, details.section, details.sectionnumber);
}
},
/**
* Do the file upload: show the dummy element, use an AJAX call to send the data
* to the server, update the progress bar for the file, then replace the dummy
* element with the real information once the AJAX call completes
* @param file the details of the file, taken from the FileList in the drop event
* @param section the DOM element representing the selected course section
* @param sectionnumber the number of the selected course section
*/
upload_file: function(file, section, sectionnumber, module) {
// This would be an ideal place to use the Y.io function
// however, this does not support data encoded using the
// FormData object, which is needed to transfer data from
// the DataTransfer object into an XMLHTTPRequest
// This can be converted when the YUI issue has been integrated:
// http://yuilibrary.com/projects/yui3/ticket/2531274
var xhr = new XMLHttpRequest();
var self = this;
if (this.maxbytes > 0 && file.size > this.maxbytes) {
new M.core.alert({message: M.util.get_string('namedfiletoolarge', 'moodle', {filename: file.name})});
return;
}
// Add the file to the display
var resel = this.add_resource_element(file.name, section, module);
// Update the progress bar as the file is uploaded
xhr.upload.addEventListener('progress', function(e) {
if (e.lengthComputable) {
var percentage = Math.round((e.loaded * 100) / e.total);
resel.progress.style.width = percentage + '%';
}
}, false);
// Wait for the AJAX call to complete, then update the
// dummy element with the returned details
xhr.onreadystatechange = function() {
if (xhr.readyState == 1) {
this.originalUnloadEvent = window.onbeforeunload;
self.reportUploadDirtyState(true);
}
if (xhr.readyState == 4) {
if (xhr.status == 200) {
var result = JSON.parse(xhr.responseText);
if (result) {
if (result.error == 0) {
// All OK - replace the dummy element.
resel.li.outerHTML = result.fullcontent;
if (self.Y.UA.gecko > 0) {
// Fix a Firefox bug which makes sites with a '~' in their wwwroot
// log the user out when clicking on the link (before refreshing the page).
resel.li.outerHTML = unescape(resel.li.outerHTML);
}
self.add_editing(result.elementid);
// Fire the content updated event.
require(['core/event', 'jquery'], function(event, $) {
event.notifyFilterContentUpdated($(result.fullcontent));
});
} else {
// Error - remove the dummy element
resel.parent.removeChild(resel.li);
new M.core.alert({message: result.error});
}
}
} else {
new M.core.alert({message: M.util.get_string('servererror', 'moodle')});
}
self.reportUploadDirtyState(false);
}
};
// Prepare the data to send
var formData = new FormData();
try {
formData.append('repo_upload_file', file);
} catch (e) {
// Edge throws an error at this point if we try to upload a folder.
resel.parent.removeChild(resel.li);
new M.core.alert({message: M.util.get_string('filereaderror', 'moodle', file.name)});
return;
}
formData.append('sesskey', M.cfg.sesskey);
formData.append('course', this.courseid);
formData.append('section', sectionnumber);
formData.append('module', module);
formData.append('type', 'Files');
// Try reading the file to check it is not a folder, before sending it to the server.
var reader = new FileReader();
reader.onload = function() {
// File was read OK - send it to the server.
xhr.open("POST", self.url, true);
xhr.send(formData);
};
reader.onerror = function() {
// Unable to read the file (it is probably a folder) - display an error message.
resel.parent.removeChild(resel.li);
new M.core.alert({message: M.util.get_string('filereaderror', 'moodle', file.name)});
};
if (file.size > 0) {
// If this is a non-empty file, try reading the first few bytes.
// This will trigger reader.onerror() for folders and reader.onload() for ordinary, readable files.
reader.readAsText(file.slice(0, 5));
} else {
// If you call slice() on a 0-byte folder, before calling readAsText, then Firefox triggers reader.onload(),
// instead of reader.onerror().
// So, for 0-byte files, just call readAsText on the whole file (and it will trigger load/error functions as expected).
reader.readAsText(file);
}
},
/**
* Show a dialog box to gather the name of the resource / activity to be created
* from the uploaded content
* @param type the details of the type of content
* @param contents the contents to be uploaded
* @section the DOM element for the section being uploaded to
* @sectionnumber the number of the section being uploaded to
*/
handle_item: function(type, contents, section, sectionnumber) {
if (type.handlers.length == 0) {
// Nothing to handle this - should not have got here
return;
}
if (type.handlers.length == 1 && type.handlers[0].noname) {
// Only one handler and it doesn't need a name (i.e. a label).
this.upload_item('', type.type, contents, section, sectionnumber, type.handlers[0].module);
this.check_upload_queue();
return;
}
if (this.uploaddialog) {
var details = new Object();
details.isfile = false;
details.type = type;
details.contents = contents;
details.section = section;
details.setcionnumber = sectionnumber;
this.uploadqueue.push(details);
return;
}
this.uploaddialog = true;
var timestamp = new Date().getTime();
var uploadid = Math.round(Math.random()*100000)+'-'+timestamp;
var nameid = 'dndupload_handler_name'+uploadid;
var content = '';
if (type.handlers.length > 1) {
content += '<p>'+type.handlermessage+'</p>';
content += '<div id="dndupload_handlers'+uploadid+'">';
var sel = type.handlers[0].module;
for (var i=0; i<type.handlers.length; i++) {
var id = 'dndupload_handler'+uploadid+type.handlers[i].module;
var checked = (type.handlers[i].module == sel) ? 'checked="checked" ' : '';
content += '<input type="radio" name="handler" value="'+i+'" id="'+id+'" '+checked+'/>';
content += ' <label for="'+id+'">';
content += type.handlers[i].message;
content += '</label><br/>';
}
content += '</div>';
}
var disabled = (type.handlers[0].noname) ? ' disabled = "disabled" ' : '';
content += '<label for="'+nameid+'">'+type.namemessage+'</label>';
content += ' <input type="text" id="'+nameid+'" value="" '+disabled+' />';
var Y = this.Y;
var self = this;
var panel = new M.core.dialogue({
bodyContent: content,
width: '350px',
modal: true,
visible: true,
render: true,
align: {
node: null,
points: [Y.WidgetPositionAlign.CC, Y.WidgetPositionAlign.CC]
}
});
// When the panel is hidden - destroy it and then check for other pending uploads
panel.after("visibleChange", function(e) {
if (!panel.get('visible')) {
panel.destroy(true);
self.check_upload_queue();
}
});
var namefield = Y.one('#'+nameid);
var submit = function(e) {
e.preventDefault();
var name = Y.Lang.trim(namefield.get('value'));
var module = false;
var noname = false;
if (type.handlers.length > 1) {
// Find out which module was selected
var div = Y.one('#dndupload_handlers'+uploadid);
div.all('input').each(function(input) {
if (input.get('checked')) {
var idx = input.get('value');
module = type.handlers[idx].module;
noname = type.handlers[idx].noname;
}
});
if (!module) {
return;
}
} else {
module = type.handlers[0].module;
noname = type.handlers[0].noname;
}
if (name == '' && !noname) {
return;
}
if (noname) {
name = '';
}
panel.hide();
// Do the upload
self.upload_item(name, type.type, contents, section, sectionnumber, module);
};
// Add the submit/cancel buttons to the bottom of the dialog.
panel.addButton({
label: M.util.get_string('upload', 'moodle'),
action: submit,
section: Y.WidgetStdMod.FOOTER,
name: 'submit'
});
panel.addButton({
label: M.util.get_string('cancel', 'moodle'),
action: function(e) {
e.preventDefault();
panel.hide();
},
section: Y.WidgetStdMod.FOOTER
});
var submitbutton = panel.getButton('submit').button;
namefield.on('key', submit, 'enter'); // Submit the form if 'enter' pressed
namefield.after('keyup', function() {
if (Y.Lang.trim(namefield.get('value')) == '') {
submitbutton.disable();
} else {
submitbutton.enable();
}
});
// Enable / disable the 'name' box, depending on the handler selected.
for (i=0; i<type.handlers.length; i++) {
if (type.handlers[i].noname) {
Y.one('#dndupload_handler'+uploadid+type.handlers[i].module).on('click', function (e) {
namefield.set('disabled', 'disabled');
submitbutton.enable();
});
} else {
Y.one('#dndupload_handler'+uploadid+type.handlers[i].module).on('click', function (e) {
namefield.removeAttribute('disabled');
namefield.focus();
if (Y.Lang.trim(namefield.get('value')) == '') {
submitbutton.disable();
}
});
}
}
// Focus on the 'name' box
Y.one('#'+nameid).focus();
},
/**
* Upload any data types that are not files: display a dummy resource element, send
* the data to the server, update the progress bar for the file, then replace the
* dummy element with the real information once the AJAX call completes
* @param name the display name for the resource / activity to create
* @param type the details of the data type found in the drop event
* @param contents the actual data that was dropped
* @param section the DOM element representing the selected course section
* @param sectionnumber the number of the selected course section
* @param module the module chosen to handle this upload
*/
upload_item: function(name, type, contents, section, sectionnumber, module) {
// This would be an ideal place to use the Y.io function
// however, this does not support data encoded using the
// FormData object, which is needed to transfer data from
// the DataTransfer object into an XMLHTTPRequest
// This can be converted when the YUI issue has been integrated:
// http://yuilibrary.com/projects/yui3/ticket/2531274
var xhr = new XMLHttpRequest();
var self = this;
// Add the item to the display
var resel = this.add_resource_element(name, section, module);
// Wait for the AJAX call to complete, then update the
// dummy element with the returned details
xhr.onreadystatechange = function() {
if (xhr.readyState == 1) {
this.originalUnloadEvent = window.onbeforeunload;
self.reportUploadDirtyState(true);
}
if (xhr.readyState == 4) {
if (xhr.status == 200) {
var result = JSON.parse(xhr.responseText);
if (result) {
if (result.error == 0) {
// All OK - replace the dummy element.
resel.li.outerHTML = result.fullcontent;
if (self.Y.UA.gecko > 0) {
// Fix a Firefox bug which makes sites with a '~' in their wwwroot
// log the user out when clicking on the link (before refreshing the page).
resel.li.outerHTML = unescape(resel.li.outerHTML);
}
self.add_editing(result.elementid);
} else {
// Error - remove the dummy element
resel.parent.removeChild(resel.li);
new M.core.alert({message: result.error});
}
}
} else {
new M.core.alert({message: M.util.get_string('servererror', 'moodle')});
}
self.reportUploadDirtyState(false);
}
};
// Prepare the data to send
var formData = new FormData();
formData.append('contents', contents);
formData.append('displayname', name);
formData.append('sesskey', M.cfg.sesskey);
formData.append('course', this.courseid);
formData.append('section', sectionnumber);
formData.append('type', type);
formData.append('module', module);
// Send the data
xhr.open("POST", this.url, true);
xhr.send(formData);
},
/**
* Call the AJAX course editing initialisation to add the editing tools
* to the newly-created resource link
* @param elementid the id of the DOM element containing the new resource link
* @param sectionnumber the number of the selected course section
*/
add_editing: function(elementid) {
var node = Y.one('#' + elementid);
YUI().use('moodle-course-coursebase', function(Y) {
Y.log("Invoking setup_for_resource", 'debug', 'coursedndupload');
M.course.coursebase.invoke_function('setup_for_resource', node);
});
if (M.core.actionmenu && M.core.actionmenu.newDOMNode) {
M.core.actionmenu.newDOMNode(node);
}
},
/**
* Set the event to prevent user navigate away when upload progress still running.
*
* @param {bool} enable true if upload progress is running, false otherwise
*/
reportUploadDirtyState: function(enable) {
if (!enable) {
window.onbeforeunload = this.originalUnloadEvent;
} else {
window.onbeforeunload = function(e) {
var warningMessage = M.util.get_string('changesmadereallygoaway', 'moodle');
if (e) {
e.returnValue = warningMessage;
}
return warningMessage;
};
}
}
};