MDL-33946 mod_label - create label from text dragged and dropped into the course
[moodle.git] / course / dndupload.js
CommitLineData
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1// This file is part of Moodle - http://moodle.org/
2//
3// Moodle is free software: you can redistribute it and/or modify
4// it under the terms of the GNU General Public License as published by
5// the Free Software Foundation, either version 3 of the License, or
6// (at your option) any later version.
7//
8// Moodle is distributed in the hope that it will be useful,
9// but WITHOUT ANY WARRANTY; without even the implied warranty of
10// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11// GNU General Public License for more details.
12//
13// You should have received a copy of the GNU General Public License
14// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
15
16/**
17 * Javascript library for enableing a drag and drop upload to courses
18 *
a0a06d05 19 * @package core
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20 * @subpackage course
21 * @copyright 2012 Davo Smith
22 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
23 */
24M.course_dndupload = {
25 // YUI object.
26 Y: null,
27 // URL for upload requests
33b24bdd 28 url: M.cfg.wwwroot + '/course/dndupload.php',
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29 // maximum size of files allowed in this form
30 maxbytes: 0,
31 // ID of the course we are on
32 courseid: null,
33 // Data about the different file/data handlers that are available
34 handlers: null,
35 // Nasty hack to distinguish between dragenter(first entry),
36 // dragenter+dragleave(moving between child elements) and dragleave (leaving element)
37 entercount: 0,
38 // Used to keep track of the section we are dragging across - to make
39 // spotting movement between sections more reliable
40 currentsection: null,
41 // Used to store the pending uploads whilst the user is being asked for further input
42 uploadqueue: null,
43 // True if the there is currently a dialog being shown (asking for a name, or giving a
44 // choice of file handlers)
45 uploaddialog: false,
46 // An array containing the last selected file handler for each file type
47 lastselected: null,
48
49 // The following are used to identify specific parts of the course page
50
51 // The type of HTML element that is a course section
52 sectiontypename: 'li',
53 // The classes that an element must have to be identified as a course section
54 sectionclasses: ['section', 'main'],
55 // The ID of the main content area of the page (for adding the 'status' div)
6c0ae99b 56 pagecontentid: 'page',
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57 // The selector identifying the list of modules within a section (note changing this may require
58 // changes to the get_mods_element function)
59 modslistselector: 'ul.section',
60
61 /**
62 * Initalise the drag and drop upload interface
63 * Note: one and only one of options.filemanager and options.formcallback must be defined
64 *
65 * @param Y the YUI object
66 * @param object options {
67 * courseid: ID of the course we are on
68 * maxbytes: maximum size of files allowed in this form
69 * handlers: Data about the different file/data handlers that are available
70 * }
71 */
72 init: function(Y, options) {
73 this.Y = Y;
74
75 if (!this.browser_supported()) {
76 return; // Browser does not support the required functionality
77 }
78
79 this.maxbytes = options.maxbytes;
80 this.courseid = options.courseid;
81 this.handlers = options.handlers;
82 this.uploadqueue = new Array();
83 this.lastselected = new Array();
84
85 var sectionselector = this.sectiontypename + '.' + this.sectionclasses.join('.');
86 var sections = this.Y.all(sectionselector);
87 if (sections.isEmpty()) {
88 return; // No sections - incompatible course format or front page.
89 }
90 sections.each( function(el) {
91 this.add_preview_element(el);
92 this.init_events(el);
93 }, this);
94
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95 if (options.showstatus) {
96 this.add_status_div();
97 }
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98 },
99
100 /**
101 * Add a div element to tell the user that drag and drop upload
102 * is available (or to explain why it is not available)
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103 */
104 add_status_div: function() {
32528f94 105 var coursecontents = document.getElementById(this.pagecontentid);
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106 if (!coursecontents) {
107 return;
32528f94 108 }
b64300fc 109
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110 var div = document.createElement('div');
111 div.id = 'dndupload-status';
112 div.style.opacity = 0.0;
113 coursecontents.insertBefore(div, coursecontents.firstChild);
114
115 var Y = this.Y;
116 div = Y.one(div);
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117 var handlefile = (this.handlers.filehandlers.length > 0);
118 var handletext = false;
119 var handlelink = false;
120 var i;
121 for (i=0; i<this.handlers.types.length; i++) {
122 switch (this.handlers.types[i].identifier) {
123 case 'text':
124 case 'text/html':
125 handletext = true;
126 break;
127 case 'url':
128 handlelink = true;
129 break;
130 }
131 }
132 $msgident = 'dndworking';
133 if (handlefile) {
134 $msgident += 'file';
135 }
136 if (handletext) {
137 $msgident += 'text';
138 }
139 if (handlelink) {
140 $msgident += 'link';
141 }
142 div.setContent(M.util.get_string($msgident, 'moodle'));
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143
144 var fadeanim = new Y.Anim({
145 node: '#dndupload-status',
146 from: {
147 opacity: 0.0,
148 top: '-30px'
149 },
150
151 to: {
152 opacity: 1.0,
153 top: '0px'
154 },
155 duration: 0.5
156 });
157 fadeanim.once('end', function(e) {
158 this.set('reverse', 1);
159 Y.later(3000, this, 'run', null, false);
160 });
161 fadeanim.run();
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162 },
163
164 /**
165 * Check the browser has the required functionality
166 * @return true if browser supports drag/drop upload
167 */
168 browser_supported: function() {
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169 if (typeof FileReader == 'undefined') {
170 return false;
171 }
172 if (typeof FormData == 'undefined') {
173 return false;
174 }
175 return true;
176 },
177
178 /**
179 * Initialise drag events on node container, all events need
180 * to be processed for drag and drop to work
181 * @param el the element to add events to
182 */
183 init_events: function(el) {
184 this.Y.on('dragenter', this.drag_enter, el, this);
185 this.Y.on('dragleave', this.drag_leave, el, this);
186 this.Y.on('dragover', this.drag_over, el, this);
187 this.Y.on('drop', this.drop, el, this);
188 },
189
190 /**
191 * Work out which course section a given element is in
192 * @param el the child DOM element within the section
193 * @return the DOM element representing the section
194 */
195 get_section: function(el) {
196 var sectionclasses = this.sectionclasses;
197 return el.ancestor( function(test) {
198 var i;
199 for (i=0; i<sectionclasses.length; i++) {
200 if (!test.hasClass(sectionclasses[i])) {
201 return false;
202 }
203 return true;
204 }
205 }, true);
206 },
207
208 /**
209 * Work out the number of the section we have been dropped on to, from the section element
210 * @param DOMElement section the selected section
211 * @return int the section number
212 */
213 get_section_number: function(section) {
214 var sectionid = section.get('id').split('-');
215 if (sectionid.length < 2 || sectionid[0] != 'section') {
216 return false;
217 }
218 return parseInt(sectionid[1]);
219 },
220
221 /**
222 * Check if the event includes data of the given type
223 * @param e the event details
224 * @param type the data type to check for
225 * @return true if the data type is found in the event data
226 */
227 types_includes: function(e, type) {
228 var i;
229 var types = e._event.dataTransfer.types;
230 for (i=0; i<types.length; i++) {
231 if (types[i] == type) {
232 return true;
233 }
234 }
235 return false;
236 },
237
238 /**
239 * Look through the event data, checking it against the registered data types
240 * (in order of priority) and return details of the first matching data type
241 * @param e the event details
242 * @return mixed false if not found or an object {
243 * realtype: the type as given by the browser
244 * addmessage: the message to show to the user during dragging
245 * namemessage: the message for requesting a name for the resource from the user
246 * type: the identifier of the type (may match several 'realtype's)
247 * }
248 */
249 drag_type: function(e) {
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250 // Check there is some data attached.
251 if (e._event.dataTransfer === null) {
252 return false;
253 }
254 if (e._event.dataTransfer.types === null) {
255 return false;
256 }
257 if (e._event.dataTransfer.types.length == 0) {
258 return false;
259 }
260
261 // Check for files first.
32528f94 262 if (this.types_includes(e, 'Files')) {
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263 if (e.type != 'drop' || e._event.dataTransfer.files.length != 0) {
264 if (this.handlers.filehandlers.length == 0) {
265 return false; // No available file handlers - ignore this drag.
266 }
267 return {
268 realtype: 'Files',
269 addmessage: M.util.get_string('addfilehere', 'moodle'),
270 namemessage: null, // Should not be asked for anyway
271 type: 'Files'
272 };
5103b5e6 273 }
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274 }
275
b64300fc 276 // Check each of the registered types.
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277 var types = this.handlers.types;
278 for (var i=0; i<types.length; i++) {
279 // Check each of the different identifiers for this type
280 var dttypes = types[i].datatransfertypes;
281 for (var j=0; j<dttypes.length; j++) {
282 if (this.types_includes(e, dttypes[j])) {
283 return {
284 realtype: dttypes[j],
285 addmessage: types[i].addmessage,
286 namemessage: types[i].namemessage,
287 type: types[i].identifier,
288 handlers: types[i].handlers
289 };
290 }
291 }
292 }
293 return false; // No types we can handle
294 },
295
296 /**
297 * Check the content of the drag/drop includes a type we can handle, then, if
298 * it is, notify the browser that we want to handle it
299 * @param event e
300 * @return string type of the event or false
301 */
302 check_drag: function(e) {
303 var type = this.drag_type(e);
304 if (type) {
305 // Notify browser that we will handle this drag/drop
306 e.stopPropagation();
307 e.preventDefault();
308 }
309 return type;
310 },
311
312 /**
313 * Handle a dragenter event: add a suitable 'add here' message
314 * when a drag event occurs, containing a registered data type
315 * @param e event data
316 * @return false to prevent the event from continuing to be processed
317 */
318 drag_enter: function(e) {
319 if (!(type = this.check_drag(e))) {
320 return false;
321 }
322
323 var section = this.get_section(e.currentTarget);
324 if (!section) {
325 return false;
326 }
327
328 if (this.currentsection && this.currentsection != section) {
329 this.currentsection = section;
330 this.entercount = 1;
331 } else {
332 this.entercount++;
333 if (this.entercount > 2) {
334 this.entercount = 2;
335 return false;
336 }
337 }
338
339 this.show_preview_element(section, type);
340
341 return false;
342 },
343
344 /**
345 * Handle a dragleave event: remove the 'add here' message (if present)
346 * @param e event data
347 * @return false to prevent the event from continuing to be processed
348 */
349 drag_leave: function(e) {
350 if (!this.check_drag(e)) {
351 return false;
352 }
353
354 this.entercount--;
355 if (this.entercount == 1) {
356 return false;
357 }
358 this.entercount = 0;
359 this.currentsection = null;
360
361 this.hide_preview_element();
362 return false;
363 },
364
365 /**
366 * Handle a dragover event: just prevent the browser default (necessary
367 * to allow drag and drop handling to work)
368 * @param e event data
369 * @return false to prevent the event from continuing to be processed
370 */
371 drag_over: function(e) {
372 this.check_drag(e);
373 return false;
374 },
375
376 /**
377 * Handle a drop event: hide the 'add here' message, check the attached
378 * data type and start the upload process
379 * @param e event data
380 * @return false to prevent the event from continuing to be processed
381 */
382 drop: function(e) {
383 if (!(type = this.check_drag(e))) {
384 return false;
385 }
386
387 this.hide_preview_element();
388
389 // Work out the number of the section we are on (from its id)
390 var section = this.get_section(e.currentTarget);
391 var sectionnumber = this.get_section_number(section);
392
393 // Process the file or the included data
394 if (type.type == 'Files') {
395 var files = e._event.dataTransfer.files;
396 for (var i=0, f; f=files[i]; i++) {
397 this.handle_file(f, section, sectionnumber);
398 }
399 } else {
400 var contents = e._event.dataTransfer.getData(type.realtype);
401 if (contents) {
402 this.handle_item(type, contents, section, sectionnumber);
403 }
404 }
405
406 return false;
407 },
408
409 /**
410 * Find or create the 'ul' element that contains all of the module
411 * instances in this section
412 * @param section the DOM element representing the section
413 * @return false to prevent the event from continuing to be processed
414 */
415 get_mods_element: function(section) {
416 // Find the 'ul' containing the list of mods
417 var modsel = section.one(this.modslistselector);
418 if (!modsel) {
419 // Create the above 'ul' if it doesn't exist
420 var modsel = document.createElement('ul');
421 modsel.className = 'section img-text';
422 var contentel = section.get('children').pop();
423 var brel = contentel.get('children').pop();
424 contentel.insertBefore(modsel, brel);
425 modsel = this.Y.one(modsel);
426 }
427
428 return modsel;
429 },
430
431 /**
432 * Add a new dummy item to the list of mods, to be replaced by a real
433 * item & link once the AJAX upload call has completed
434 * @param name the label to show in the element
435 * @param section the DOM element reperesenting the course section
436 * @return DOM element containing the new item
437 */
785e09a7 438 add_resource_element: function(name, section, module) {
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439 var modsel = this.get_mods_element(section);
440
441 var resel = {
442 parent: modsel,
443 li: document.createElement('li'),
444 div: document.createElement('div'),
eacc63ab 445 indentdiv: document.createElement('div'),
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446 a: document.createElement('a'),
447 icon: document.createElement('img'),
448 namespan: document.createElement('span'),
bc3f5bca 449 groupingspan: document.createElement('span'),
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450 progressouter: document.createElement('span'),
451 progress: document.createElement('span')
452 };
453
785e09a7 454 resel.li.className = 'activity ' + module + ' modtype_' + module;
32528f94 455
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456 resel.indentdiv.className = 'mod-indent';
457 resel.li.appendChild(resel.indentdiv);
458
459 resel.div.className = 'activityinstance';
460 resel.indentdiv.appendChild(resel.div);
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461
462 resel.a.href = '#';
463 resel.div.appendChild(resel.a);
464
465 resel.icon.src = M.util.image_url('i/ajaxloader');
eacc63ab 466 resel.icon.className = 'activityicon iconlarge';
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467 resel.a.appendChild(resel.icon);
468
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469 resel.namespan.className = 'instancename';
470 resel.namespan.innerHTML = name;
471 resel.a.appendChild(resel.namespan);
472
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473 resel.groupingspan.className = 'groupinglabel';
474 resel.div.appendChild(resel.groupingspan);
475
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476 resel.progressouter.className = 'dndupload-progress-outer';
477 resel.progress.className = 'dndupload-progress-inner';
478 resel.progress.innerHTML = '&nbsp;';
479 resel.progressouter.appendChild(resel.progress);
480 resel.div.appendChild(resel.progressouter);
481
482 modsel.insertBefore(resel.li, modsel.get('children').pop()); // Leave the 'preview element' at the bottom
483
484 return resel;
485 },
486
487 /**
488 * Hide any visible dndupload-preview elements on the page
489 */
490 hide_preview_element: function() {
491 this.Y.all('li.dndupload-preview').addClass('dndupload-hidden');
492 },
493
494 /**
495 * Unhide the preview element for the given section and set it to display
496 * the correct message
497 * @param section the YUI node representing the selected course section
498 * @param type the details of the data type detected in the drag (including the message to display)
499 */
500 show_preview_element: function(section, type) {
501 this.hide_preview_element();
502 var preview = section.one('li.dndupload-preview').removeClass('dndupload-hidden');
503 preview.one('span').setContent(type.addmessage);
504 },
505
506 /**
507 * Add the preview element to a course section. Note: this needs to be done before 'addEventListener'
508 * is called, otherwise Firefox will ignore events generated when the mouse is over the preview
509 * element (instead of passing them up to the parent element)
510 * @param section the YUI node representing the selected course section
511 */
512 add_preview_element: function(section) {
513 var modsel = this.get_mods_element(section);
514 var preview = {
515 li: document.createElement('li'),
516 div: document.createElement('div'),
517 icon: document.createElement('img'),
518 namespan: document.createElement('span')
519 };
520
4d40dc92 521 preview.li.className = 'dndupload-preview dndupload-hidden';
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522
523 preview.div.className = 'mod-indent';
524 preview.li.appendChild(preview.div);
525
526 preview.icon.src = M.util.image_url('t/addfile');
8a3b8918 527 preview.icon.className = 'icon';
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528 preview.div.appendChild(preview.icon);
529
530 preview.div.appendChild(document.createTextNode(' '));
531
532 preview.namespan.className = 'instancename';
33b24bdd 533 preview.namespan.innerHTML = M.util.get_string('addfilehere', 'moodle');
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534 preview.div.appendChild(preview.namespan);
535
536 modsel.appendChild(preview.li);
537 },
538
539 /**
540 * Find the registered handler for the given file type. If there is more than one, ask the
541 * user which one to use. Then upload the file to the server
542 * @param file the details of the file, taken from the FileList in the drop event
543 * @param section the DOM element representing the selected course section
544 * @param sectionnumber the number of the selected course section
545 */
546 handle_file: function(file, section, sectionnumber) {
547 var handlers = new Array();
548 var filehandlers = this.handlers.filehandlers;
549 var extension = '';
550 var dotpos = file.name.lastIndexOf('.');
551 if (dotpos != -1) {
04a38bd3 552 extension = file.name.substr(dotpos+1, file.name.length).toLowerCase();
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553 }
554
555 for (var i=0; i<filehandlers.length; i++) {
556 if (filehandlers[i].extension == '*' || filehandlers[i].extension == extension) {
557 handlers.push(filehandlers[i]);
558 }
559 }
560
561 if (handlers.length == 0) {
562 // No handlers at all (not even 'resource'?)
563 return;
564 }
565
566 if (handlers.length == 1) {
567 this.upload_file(file, section, sectionnumber, handlers[0].module);
568 return;
569 }
570
571 this.file_handler_dialog(handlers, extension, file, section, sectionnumber);
572 },
573
574 /**
575 * Show a dialog box, allowing the user to choose what to do with the file they are uploading
576 * @param handlers the available handlers to choose between
577 * @param extension the extension of the file being uploaded
578 * @param file the File object being uploaded
579 * @param section the DOM element of the section being uploaded to
580 * @param sectionnumber the number of the selected course section
581 */
582 file_handler_dialog: function(handlers, extension, file, section, sectionnumber) {
583 if (this.uploaddialog) {
584 var details = new Object();
585 details.isfile = true;
586 details.handlers = handlers;
587 details.extension = extension;
588 details.file = file;
589 details.section = section;
590 details.sectionnumber = sectionnumber;
591 this.uploadqueue.push(details);
592 return;
593 }
594 this.uploaddialog = true;
595
596 var timestamp = new Date().getTime();
597 var uploadid = Math.round(Math.random()*100000)+'-'+timestamp;
598 var content = '';
599 var sel;
600 if (extension in this.lastselected) {
601 sel = this.lastselected[extension];
602 } else {
603 sel = handlers[0].module;
604 }
33b24bdd 605 content += '<p>'+M.util.get_string('actionchoice', 'moodle', file.name)+'</p>';
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606 content += '<div id="dndupload_handlers'+uploadid+'">';
607 for (var i=0; i<handlers.length; i++) {
608 var id = 'dndupload_handler'+uploadid+handlers[i].module;
609 var checked = (handlers[i].module == sel) ? 'checked="checked" ' : '';
610 content += '<input type="radio" name="handler" value="'+handlers[i].module+'" id="'+id+'" '+checked+'/>';
611 content += ' <label for="'+id+'">';
612 content += handlers[i].message;
613 content += '</label><br/>';
614 }
615 content += '</div>';
616
617 var Y = this.Y;
618 var self = this;
619 var panel = new Y.Panel({
620 bodyContent: content,
621 width: 350,
622 zIndex: 5,
623 centered: true,
624 modal: true,
625 visible: true,
626 render: true,
627 buttons: [{
a0a06d05 628 value: M.util.get_string('upload', 'moodle'),
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629 action: function(e) {
630 e.preventDefault();
631 // Find out which module was selected
632 var module = false;
633 var div = Y.one('#dndupload_handlers'+uploadid);
634 div.all('input').each(function(input) {
635 if (input.get('checked')) {
636 module = input.get('value');
637 }
638 });
639 if (!module) {
640 return;
641 }
642 panel.hide();
643 // Remember this selection for next time
644 self.lastselected[extension] = module;
645 // Do the upload
646 self.upload_file(file, section, sectionnumber, module);
647 },
648 section: Y.WidgetStdMod.FOOTER
649 },{
a0a06d05 650 value: M.util.get_string('cancel', 'moodle'),
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651 action: function(e) {
652 e.preventDefault();
653 panel.hide();
654 },
655 section: Y.WidgetStdMod.FOOTER
656 }]
657 });
658 // When the panel is hidden - destroy it and then check for other pending uploads
659 panel.after("visibleChange", function(e) {
660 if (!panel.get('visible')) {
661 panel.destroy(true);
662 self.check_upload_queue();
663 }
664 });
665 },
666
667 /**
668 * Check to see if there are any other dialog boxes to show, now that the current one has
669 * been dealt with
670 */
671 check_upload_queue: function() {
672 this.uploaddialog = false;
673 if (this.uploadqueue.length == 0) {
674 return;
675 }
676
677 var details = this.uploadqueue.shift();
678 if (details.isfile) {
679 this.file_handler_dialog(details.handlers, details.extension, details.file, details.section, details.sectionnumber);
680 } else {
681 this.handle_item(details.type, details.contents, details.section, details.sectionnumber);
682 }
683 },
684
685 /**
686 * Do the file upload: show the dummy element, use an AJAX call to send the data
687 * to the server, update the progress bar for the file, then replace the dummy
688 * element with the real information once the AJAX call completes
689 * @param file the details of the file, taken from the FileList in the drop event
690 * @param section the DOM element representing the selected course section
691 * @param sectionnumber the number of the selected course section
692 */
693 upload_file: function(file, section, sectionnumber, module) {
694
695 // This would be an ideal place to use the Y.io function
696 // however, this does not support data encoded using the
697 // FormData object, which is needed to transfer data from
698 // the DataTransfer object into an XMLHTTPRequest
699 // This can be converted when the YUI issue has been integrated:
700 // http://yuilibrary.com/projects/yui3/ticket/2531274
701 var xhr = new XMLHttpRequest();
702 var self = this;
703
704 if (file.size > this.maxbytes) {
33b24bdd 705 alert("'"+file.name+"' "+M.util.get_string('filetoolarge', 'moodle'));
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706 return;
707 }
708
709 // Add the file to the display
785e09a7 710 var resel = this.add_resource_element(file.name, section, module);
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711
712 // Update the progress bar as the file is uploaded
713 xhr.upload.addEventListener('progress', function(e) {
714 if (e.lengthComputable) {
715 var percentage = Math.round((e.loaded * 100) / e.total);
716 resel.progress.style.width = percentage + '%';
717 }
718 }, false);
719
720 // Wait for the AJAX call to complete, then update the
721 // dummy element with the returned details
722 xhr.onreadystatechange = function() {
723 if (xhr.readyState == 4) {
724 if (xhr.status == 200) {
725 var result = JSON.parse(xhr.responseText);
726 if (result) {
727 if (result.error == 0) {
728 // All OK - update the dummy element
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729 if (result.content) {
730 // A label
731 resel.indentdiv.innerHTML = '<div class="activityinstance" ></div>' + result.content + result.commands;
bc3f5bca 732 } else {
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733 // Not a label
734 resel.icon.src = result.icon;
735 resel.a.href = result.link;
736 resel.namespan.innerHTML = result.name;
737
738 if (!parseInt(result.visible, 10)) {
739 resel.a.className = 'dimmed';
740 }
741
742 if (result.groupingname) {
743 resel.groupingspan.innerHTML = '(' + result.groupingname + ')';
744 } else {
745 resel.div.removeChild(resel.groupingspan);
746 }
747
748 resel.div.removeChild(resel.progressouter);
749 resel.indentdiv.innerHTML += result.commands;
750 if (result.onclick) {
751 resel.a.onclick = result.onclick;
752 }
753 if (self.Y.UA.gecko > 0) {
754 // Fix a Firefox bug which makes sites with a '~' in their wwwroot
755 // log the user out when clicking on the link (before refreshing the page).
756 resel.div.innerHTML = unescape(resel.div.innerHTML);
757 }
bc3f5bca 758 }
32528f94 759 resel.li.id = result.elementid;
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760 self.add_editing(result.elementid);
761 } else {
762 // Error - remove the dummy element
763 resel.parent.removeChild(resel.li);
764 alert(result.error);
765 }
766 }
767 } else {
33b24bdd 768 alert(M.util.get_string('servererror', 'moodle'));
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769 }
770 }
771 };
772
773 // Prepare the data to send
774 var formData = new FormData();
775 formData.append('repo_upload_file', file);
776 formData.append('sesskey', M.cfg.sesskey);
777 formData.append('course', this.courseid);
778 formData.append('section', sectionnumber);
779 formData.append('module', module);
780 formData.append('type', 'Files');
781
782 // Send the AJAX call
783 xhr.open("POST", this.url, true);
784 xhr.send(formData);
785 },
786
787 /**
788 * Show a dialog box to gather the name of the resource / activity to be created
789 * from the uploaded content
790 * @param type the details of the type of content
791 * @param contents the contents to be uploaded
792 * @section the DOM element for the section being uploaded to
793 * @sectionnumber the number of the section being uploaded to
794 */
795 handle_item: function(type, contents, section, sectionnumber) {
796 if (type.handlers.length == 0) {
797 // Nothing to handle this - should not have got here
798 return;
799 }
800
801 if (this.uploaddialog) {
802 var details = new Object();
803 details.isfile = false;
804 details.type = type;
805 details.contents = contents;
806 details.section = section;
807 details.setcionnumber = sectionnumber;
808 this.uploadqueue.push(details);
809 return;
810 }
811 this.uploaddialog = true;
812
813 var timestamp = new Date().getTime();
814 var uploadid = Math.round(Math.random()*100000)+'-'+timestamp;
815 var nameid = 'dndupload_handler_name'+uploadid;
816 var content = '';
817 content += '<label for="'+nameid+'">'+type.namemessage+'</label>';
818 content += ' <input type="text" id="'+nameid+'" value="" />';
819 if (type.handlers.length > 1) {
820 content += '<div id="dndupload_handlers'+uploadid+'">';
821 var sel = type.handlers[0].module;
822 for (var i=0; i<type.handlers.length; i++) {
823 var id = 'dndupload_handler'+uploadid;
824 var checked = (type.handlers[i].module == sel) ? 'checked="checked" ' : '';
825 content += '<input type="radio" name="handler" value="'+type.handlers[i].module+'" id="'+id+'" '+checked+'/>';
826 content += ' <label for="'+id+'">';
827 content += type.handlers[i].message;
828 content += '</label><br/>';
829 }
830 content += '</div>';
831 }
832
833 var Y = this.Y;
834 var self = this;
835 var panel = new Y.Panel({
836 bodyContent: content,
837 width: 350,
838 zIndex: 5,
839 centered: true,
840 modal: true,
841 visible: true,
842 render: true,
843 buttons: [{
a0a06d05 844 value: M.util.get_string('upload', 'moodle'),
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845 action: function(e) {
846 e.preventDefault();
847 var name = Y.one('#dndupload_handler_name'+uploadid).get('value');
848 name = name.replace(/^\s\s*/, '').replace(/\s\s*$/, ''); // Trim
849 if (name == '') {
850 return;
851 }
852 var module = false;
853 if (type.handlers.length > 1) {
854 // Find out which module was selected
855 var div = Y.one('#dndupload_handlers'+uploadid);
856 div.all('input').each(function(input) {
857 if (input.get('checked')) {
858 module = input.get('value');
859 }
860 });
861 if (!module) {
862 return;
863 }
864 } else {
865 module = type.handlers[0].module;
866 }
867 panel.hide();
868 // Do the upload
869 self.upload_item(name, type.type, contents, section, sectionnumber, module);
870 },
871 section: Y.WidgetStdMod.FOOTER
872 },{
a0a06d05 873 value: M.util.get_string('cancel', 'moodle'),
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874 action: function(e) {
875 e.preventDefault();
876 panel.hide();
877 },
878 section: Y.WidgetStdMod.FOOTER
879 }]
880 });
881 // When the panel is hidden - destroy it and then check for other pending uploads
882 panel.after("visibleChange", function(e) {
883 if (!panel.get('visible')) {
884 panel.destroy(true);
885 self.check_upload_queue();
886 }
887 });
888 // Focus on the 'name' box
889 Y.one('#'+nameid).focus();
890 },
891
892 /**
893 * Upload any data types that are not files: display a dummy resource element, send
894 * the data to the server, update the progress bar for the file, then replace the
895 * dummy element with the real information once the AJAX call completes
896 * @param name the display name for the resource / activity to create
897 * @param type the details of the data type found in the drop event
898 * @param contents the actual data that was dropped
899 * @param section the DOM element representing the selected course section
900 * @param sectionnumber the number of the selected course section
5a4decbc 901 * @param module the module chosen to handle this upload
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902 */
903 upload_item: function(name, type, contents, section, sectionnumber, module) {
904
905 // This would be an ideal place to use the Y.io function
906 // however, this does not support data encoded using the
907 // FormData object, which is needed to transfer data from
908 // the DataTransfer object into an XMLHTTPRequest
909 // This can be converted when the YUI issue has been integrated:
910 // http://yuilibrary.com/projects/yui3/ticket/2531274
911 var xhr = new XMLHttpRequest();
912 var self = this;
913
914 // Add the item to the display
785e09a7 915 var resel = this.add_resource_element(name, section, module);
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916
917 // Wait for the AJAX call to complete, then update the
918 // dummy element with the returned details
919 xhr.onreadystatechange = function() {
920 if (xhr.readyState == 4) {
921 if (xhr.status == 200) {
922 var result = JSON.parse(xhr.responseText);
923 if (result) {
924 if (result.error == 0) {
925 // All OK - update the dummy element
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926 if (result.content) {
927 // A label
928 resel.indentdiv.innerHTML = '<div class="activityinstance" ></div>' + result.content + result.commands;
bc3f5bca 929 } else {
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930 // Not a label
931 resel.icon.src = result.icon;
932 resel.a.href = result.link;
933 resel.namespan.innerHTML = result.name;
934
935 if (!parseInt(result.visible, 10)) {
936 resel.a.className = 'dimmed';
937 }
938
939 if (result.groupingname) {
940 resel.groupingspan.innerHTML = '(' + result.groupingname + ')';
941 } else {
942 resel.div.removeChild(resel.groupingspan);
943 }
944
945 resel.div.removeChild(resel.progressouter);
946 resel.div.innerHTML += result.commands;
947 if (result.onclick) {
948 resel.a.onclick = result.onclick;
949 }
950 if (self.Y.UA.gecko > 0) {
951 // Fix a Firefox bug which makes sites with a '~' in their wwwroot
952 // log the user out when clicking on the link (before refreshing the page).
953 resel.div.innerHTML = unescape(resel.div.innerHTML);
954 }
d022f632 955 }
32528f94 956 resel.li.id = result.elementid;
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957 self.add_editing(result.elementid, sectionnumber);
958 } else {
959 // Error - remove the dummy element
960 resel.parent.removeChild(resel.li);
961 alert(result.error);
962 }
963 }
964 } else {
33b24bdd 965 alert(M.util.get_string('servererror', 'moodle'));
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966 }
967 }
968 };
969
970 // Prepare the data to send
971 var formData = new FormData();
972 formData.append('contents', contents);
973 formData.append('displayname', name);
974 formData.append('sesskey', M.cfg.sesskey);
975 formData.append('course', this.courseid);
976 formData.append('section', sectionnumber);
977 formData.append('type', type);
978 formData.append('module', module);
979
980 // Send the data
981 xhr.open("POST", this.url, true);
982 xhr.send(formData);
983 },
984
985 /**
986 * Call the AJAX course editing initialisation to add the editing tools
987 * to the newly-created resource link
988 * @param elementid the id of the DOM element containing the new resource link
989 * @param sectionnumber the number of the selected course section
990 */
991 add_editing: function(elementid) {
992 YUI().use('moodle-course-coursebase', function(Y) {
993 M.course.coursebase.invoke_function('setup_for_resource', '#' + elementid);
994 });
995 }
996};