comment/comment.js

   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  * Comment Helper
  18  * @author Dongsheng Cai <dongsheng@moodle.com>
  19  */
  20 M.core_comment = {
  21     /**
  22      * Initialize commenting system
  23      */
  24     init: function(Y, options) {
  25         var CommentHelper = function(args) {
  26             CommentHelper.superclass.constructor.apply(this, arguments);
  27         };
  28         CommentHelper.NAME = "COMMENT";
  29         CommentHelper.ATTRS = {
  30             options: {},
  31             lang: {}
  32         };
  33         Y.extend(CommentHelper, Y.Base, {
  34             api: M.cfg.wwwroot+'/comment/comment_ajax.php',
  35             initializer: function(args) {
  36                 var scope = this;
  37                 this.client_id = args.client_id;
  38                 this.itemid = args.itemid;
  39                 this.commentarea = args.commentarea;
  40                 this.component = args.component;
  41                 this.courseid = args.courseid;
  42                 this.contextid = args.contextid;
  43                 this.autostart = (args.autostart);
  44                 // expand comments?
  45                 if (this.autostart) {
  46                     this.view(args.page);
  47                 }
  48                 // load comments
  49                 var handle = Y.one('#comment-link-'+this.client_id);
  50                 // hide toggle link
  51                 if (handle) {
  52                     if (args.notoggle) {
  53                         handle.setStyle('display', 'none');
  54                     }
  55                     handle.on('click', function(e) {
  56                         e.preventDefault();
  57                         this.view(0);
  58                         return false;
  59                     }, this);
  60                     // Also handle space/enter key.
  61                     handle.on('key', function(e) {
  62                         e.preventDefault();
  63                         this.view(0);
  64                         return false;
  65                     }, '13,32', this);
  66                 }
  67                 scope.toggle_textarea(false);
  68             },
  69             post: function() {
  70                 var ta = Y.one('#dlg-content-'+this.client_id);
  71                 var scope = this;
  72                 var value = ta.get('value');
  73                 if (value && value != M.util.get_string('addcomment', 'moodle')) {
  74                     ta.set('disabled', true);
  75                     ta.setStyles({
  76                         'backgroundImage': 'url(' + M.util.image_url('i/loading_small', 'core') + ')',
  77                         'backgroundRepeat': 'no-repeat',
  78                         'backgroundPosition': 'center center'
  79                     });
  80                     var params = {'content': value};
  81                     this.request({
  82                         action: 'add',
  83                         scope: scope,
  84                         params: params,
  85                         callback: function(id, obj, args) {
  86                             var scope = args.scope;
  87                             var cid = scope.client_id;
  88                             var ta = Y.one('#dlg-content-'+cid);
  89                             ta.set('value', '');
  90                             ta.set('disabled', false);
  91                             ta.setStyle('backgroundImage', 'none');
  92                             scope.toggle_textarea(false);
  93                             var container = Y.one('#comment-list-'+cid);
  94                             var result = scope.render([obj], true);
  95                             var newcomment = Y.Node.create(result.html);
  96                             container.appendChild(newcomment);
  97                             var ids = result.ids;
  98                             var linkText = Y.one('#comment-link-text-' + cid);
  99                             if (linkText) {
 100                                 linkText.set('innerHTML', M.util.get_string('commentscount', 'moodle', obj.count));
 101                             }
 102                             for(var i in ids) {
 103                                 var attributes = {
 104                                     color: { to: '#06e' },
 105                                     backgroundColor: { to: '#FFE390' }
 106                                 };
 107                                 var anim = new Y.YUI2.util.ColorAnim(ids[i], attributes);
 108                                 anim.animate();
 109                             }
 110                             scope.register_pagination();
 111                             scope.register_delete_buttons();
 112                         }
 113                     }, true);
 114                 } else {
 115                     var attributes = {
 116                         backgroundColor: { from: '#FFE390', to:'#FFFFFF' }
 117                     };
 118                     var anim = new Y.YUI2.util.ColorAnim('dlg-content-'+cid, attributes);
 119                     anim.animate();
 120                 }
 121             },
 122             request: function(args, noloading) {
 123                 var params = {};
 124                 var scope = this;
 125                 if (args['scope']) {
 126                     scope = args['scope'];
 127                 }
 128                 //params['page'] = args.page?args.page:'';
 129                 // the form element only accept certain file types
 130                 params['sesskey']   = M.cfg.sesskey;
 131                 params['action']    = args.action?args.action:'';
 132                 params['client_id'] = this.client_id;
 133                 params['itemid']    = this.itemid;
 134                 params['area']      = this.commentarea;
 135                 params['courseid']  = this.courseid;
 136                 params['contextid'] = this.contextid;
 137                 params['component'] = this.component;
 138                 if (args['params']) {
 139                     for (i in args['params']) {
 140                         params[i] = args['params'][i];
 141                     }
 142                 }
 143                 var cfg = {
 144                     method: 'POST',
 145                     on: {
 146                         complete: function(id,o,p) {
 147                             if (!o) {
 148                                 alert('IO FATAL');
 149                                 return false;
 150                             }
 151                             var data = Y.JSON.parse(o.responseText);
 152                             if (data.error) {
 153                                 if (data.error == 'require_login') {
 154                                     args.callback(id,data,p);
 155                                     return true;
 156                                 }
 157                                 alert(data.error);
 158                                 return false;
 159                             } else {
 160                                 args.callback(id,data,p);
 161                                 return true;
 162                             }
 163                         }
 164                     },
 165                     arguments: {
 166                         scope: scope
 167                     },
 168                     headers: {
 169                         'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8'
 170                     },
 171                     data: build_querystring(params)
 172                 };
 173                 if (args.form) {
 174                     cfg.form = args.form;
 175                 }
 176                 Y.io(this.api, cfg);
 177                 if (!noloading) {
 178                     this.wait();
 179                 }
 180             },
 181             render: function(list, newcmt) {
 182                 var ret = {};
 183                 ret.ids = [];
 184                 var template = Y.one('#cmt-tmpl');
 185                 var html = '';
 186                 for(var i in list) {
 187                     var htmlid = 'comment-'+list[i].id+'-'+this.client_id;
 188                     var val = template.get('innerHTML');
 189                     if (list[i].profileurl) {
 190                         val = val.replace('___name___', '<a href="'+list[i].profileurl+'">'+list[i].fullname+'</a>');
 191                     } else {
 192                         val = val.replace('___name___', list[i].fullname);
 193                     }
 194                     if (list[i]['delete']||newcmt) {
 195                         list[i].content = '<div class="comment-delete"><a href="#" id ="comment-delete-'+this.client_id+'-'+list[i].id+'" title="'+M.util.get_string('deletecomment', 'moodle')+'"><img alt="" src="'+M.util.image_url('t/delete', 'core')+'" /></a></div>' + list[i].content;
 196                     }
 197                     val = val.replace('___time___', list[i].time);
 198                     val = val.replace('___picture___', list[i].avatar);
 199                     val = val.replace('___content___', list[i].content);
 200                     val = '<li id="'+htmlid+'">'+val+'</li>';
 201                     ret.ids.push(htmlid);
 202                     html = (val+html);
 203                 }
 204                 ret.html = html;
 205                 return ret;
 206             },
 207             load: function(page) {
 208                 var scope = this;
 209                 var container = Y.one('#comment-ctrl-'+this.client_id);
 210                 var params = {
 211                     'action': 'get',
 212                     'page': page
 213                 };
 214                 this.request({
 215                     scope: scope,
 216                     params: params,
 217                     callback: function(id, ret, args) {
 218                         var linkText = Y.one('#comment-link-text-' + scope.client_id);
 219                         if (ret.count && linkText) {
 220                             linkText.set('innerHTML', M.util.get_string('commentscount', 'moodle', ret.count));
 221                         }
 222                         var container = Y.one('#comment-list-'+scope.client_id);
 223                         var pagination = Y.one('#comment-pagination-'+scope.client_id);
 224                         if (ret.pagination) {
 225                             pagination.set('innerHTML', ret.pagination);
 226                         } else {
 227                             //empty paging bar
 228                             pagination.set('innerHTML', '');
 229                         }
 230                         if (ret.error == 'require_login') {
 231                             var result = {};
 232                             result.html = M.util.get_string('commentsrequirelogin', 'moodle');
 233                         } else {
 234                             var result = scope.render(ret.list);
 235                         }
 236                         container.set('innerHTML', result.html);
 237                         var img = Y.one('#comment-img-'+scope.client_id);
 238                         if (img) {
 239                             img.set('src', M.util.image_url('t/expanded', 'core'));
 240                         }
 241                         args.scope.register_pagination();
 242                         args.scope.register_delete_buttons();
 243                     }
 244                 });
 245             },
 246
 247             dodelete: function(id) { // note: delete is a reserved word in javascript, chrome and safary do not like it at all here!
 248                 var scope = this,
 249                     cid = scope.client_id,
 250                     params = {'commentid': id};
 251                 function remove_dom(type, anim, cmt) {
 252                     cmt.remove();
 253                     var linkText = Y.one('#comment-link-text-' + cid),
 254                         comments = Y.all('#comment-list-' + cid + ' li');
 255                     if (linkText && comments) {
 256                         linkText.set('innerHTML', M.util.get_string('commentscount', 'moodle', comments.size()));
 257                     }
 258                 }
 259                 this.request({
 260                     action: 'delete',
 261                     scope: scope,
 262                     params: params,
 263                     callback: function(id, resp, args) {
 264                         var htmlid= 'comment-'+resp.commentid+'-'+resp.client_id;
 265                         var attributes = {
 266                             width:{to:0},
 267                             height:{to:0}
 268                         };
 269                         var cmt = Y.one('#'+htmlid);
 270                         cmt.setStyle('overflow', 'hidden');
 271                         var anim = new Y.YUI2.util.Anim(htmlid, attributes, 1, Y.YUI2.util.Easing.easeOut);
 272                         anim.onComplete.subscribe(remove_dom, cmt, this);
 273                         anim.animate();
 274                     }
 275                 }, true);
 276             },
 277             register_actions: function() {
 278                 // add new comment
 279                 var action_btn = Y.one('#comment-action-post-'+this.client_id);
 280                 if (action_btn) {
 281                     action_btn.on('click', function(e) {
 282                         e.preventDefault();
 283                         this.post();
 284                         return false;
 285                     }, this);
 286                 }
 287                 // cancel comment box
 288                 var cancel = Y.one('#comment-action-cancel-'+this.client_id);
 289                 if (cancel) {
 290                     cancel.on('click', function(e) {
 291                         e.preventDefault();
 292                         this.view(0);
 293                         return false;
 294                     }, this);
 295                 }
 296             },
 297             register_delete_buttons: function() {
 298                 var scope = this;
 299                 // page buttons
 300                 Y.all('div.comment-delete a').each(
 301                     function(node, id) {
 302                         var theid = node.get('id');
 303                         var parseid = new RegExp("comment-delete-"+scope.client_id+"-(\\d+)", "i");
 304                         var commentid = theid.match(parseid);
 305                         if (!commentid) {
 306                             return;
 307                         }
 308                         if (commentid[1]) {
 309                             Y.Event.purgeElement('#'+theid, false, 'click');
 310                         }
 311                         node.on('click', function(e) {
 312                             e.preventDefault();
 313                             if (commentid[1]) {
 314                                 scope.dodelete(commentid[1]);
 315                             }
 316                         });
 317                         // Also handle space/enter key.
 318                         node.on('key', function(e) {
 319                             e.preventDefault();
 320                             if (commentid[1]) {
 321                                 scope.dodelete(commentid[1]);
 322                             }
 323                         }, '13,32');
 324                         // 13 and 32 are the keycodes for space and enter.
 325                     }
 326                 );
 327             },
 328             register_pagination: function() {
 329                 var scope = this;
 330                 // page buttons
 331                 Y.all('#comment-pagination-'+this.client_id+' a').each(
 332                     function(node, id) {
 333                         node.on('click', function(e, node) {
 334                             e.preventDefault();
 335                             var id = node.get('id');
 336                             var re = new RegExp("comment-page-"+this.client_id+"-(\\d+)", "i");
 337                             var result = id.match(re);
 338                             this.load(result[1]);
 339                         }, scope, node);
 340                     }
 341                 );
 342             },
 343             view: function(page) {
 344                 var commenttoggler = Y.one('#comment-link-' + this.client_id);
 345                 var container = Y.one('#comment-ctrl-'+this.client_id);
 346                 var ta = Y.one('#dlg-content-'+this.client_id);
 347                 var img = Y.one('#comment-img-'+this.client_id);
 348                 var d = container.getStyle('display');
 349                 if (d=='none'||d=='') {
 350                     // show
 351                     if (!this.autostart) {
 352                         this.load(page);
 353                     } else {
 354                         this.register_delete_buttons();
 355                         this.register_pagination();
 356                     }
 357                     container.setStyle('display', 'block');
 358                     if (img) {
 359                         img.set('src', M.util.image_url('t/expanded', 'core'));
 360                     }
 361                     if (commenttoggler) {
 362                         commenttoggler.setAttribute('aria-expanded', 'true');
 363                     }
 364                 } else {
 365                     // hide
 366                     container.setStyle('display', 'none');
 367                     var collapsedimage = 't/collapsed'; // ltr mode
 368                     if ( Y.one(document.body).hasClass('dir-rtl') ) {
 369                         collapsedimage = 't/collapsed_rtl';
 370                     } else {
 371                         collapsedimage = 't/collapsed';
 372                     }
 373                     img.set('src', M.util.image_url(collapsedimage, 'core'));
 374                     if (ta) {
 375                         ta.set('value','');
 376                     }
 377                     if (commenttoggler) {
 378                         commenttoggler.setAttribute('aria-expanded', 'false');
 379                     }
 380                 }
 381                 if (ta) {
 382                     //toggle_textarea.apply(ta, [false]);
 383                     //// reset textarea size
 384                     ta.on('focus', function() {
 385                         this.toggle_textarea(true);
 386                     }, this);
 387                     //ta.onkeypress = function() {
 388                         //if (this.scrollHeight > this.clientHeight && !window.opera)
 389                             //this.rows += 1;
 390                     //}
 391                     ta.on('blur', function() {
 392                         this.toggle_textarea(false);
 393                     }, this);
 394                 }
 395                 this.register_actions();
 396                 return false;
 397             },
 398             toggle_textarea: function(focus) {
 399                 var t = Y.one('#dlg-content-'+this.client_id);
 400                 if (!t) {
 401                     return false;
 402                 }
 403                 if (focus) {
 404                     if (t.get('value') == M.util.get_string('addcomment', 'moodle')) {
 405                         t.set('value', '');
 406                         t.setStyle('color', 'black');
 407                     }
 408                 }else{
 409                     if (t.get('value') == '') {
 410                         t.set('value', M.util.get_string('addcomment', 'moodle'));
 411                         t.setStyle('color','grey');
 412                         t.set('rows', 2);
 413                     }
 414                 }
 415             },
 416             wait: function() {
 417                 var container = Y.one('#comment-list-'+this.client_id);
 418                 container.set('innerHTML', '<div class="mdl-align"><img src="'+M.util.image_url('i/loading_small', 'core')+'" /></div>');
 419             }
 420         });
 421
 422         new CommentHelper(options);
 423     },
 424     init_admin: function(Y) {
 425         var select_all = Y.one('#comment_select_all');
 426         if (select_all) {
 427             select_all.on('click', function(e) {
 428                 var comments = document.getElementsByName('comments');
 429                 var checked = false;
 430                 for (var i in comments) {
 431                     if (comments[i].checked) {
 432                         checked=true;
 433                     }
 434                 }
 435                 for (i in comments) {
 436                     comments[i].checked = !checked;
 437                 }
 438                 this.set('checked', !checked);
 439             });
 440         }
 441
 442         var comments_delete = Y.one('#comments_delete');
 443         if (comments_delete) {
 444             comments_delete.on('click', function(e) {
 445                 e.preventDefault();
 446                 var list = '';
 447                 var comments = document.getElementsByName('comments');
 448                 for (var i in comments) {
 449                     if (typeof comments[i] == 'object' && comments[i].checked) {
 450                         list += (comments[i].value + '-');
 451                     }
 452                 }
 453                 if (!list) {
 454                     return;
 455                 }
 456                 var args = {};
 457                 args.message = M.util.get_string('confirmdeletecomments', 'admin');
 458                 args.callback = function() {
 459                     var url = M.cfg.wwwroot + '/comment/index.php';
 460
 461                     var data = {
 462                         'commentids': list,
 463                         'sesskey': M.cfg.sesskey,
 464                         'action': 'delete'
 465                     };
 466                     var cfg = {
 467                         method: 'POST',
 468                         on: {
 469                             complete: function(id,o,p) {
 470                                 if (!o) {
 471                                     alert('IO FATAL');
 472                                     return;
 473                                 }
 474                                 if (o.responseText == 'yes') {
 475                                     location.reload();
 476                                 }
 477                             }
 478                         },
 479                         arguments: {
 480                             scope: this
 481                         },
 482                         headers: {
 483                             'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8'
 484                         },
 485                         data: build_querystring(data)
 486                     };
 487                     Y.io(url, cfg);
 488                 };
 489                 M.util.show_confirm_dialog(e, args);
 490             });
 491         }
 492     }
 493 };