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.courseid = args.courseid;
  41                 this.contextid = args.contextid;
  42                 this.env = args.env;
  43                 // expand comments?
  44                 if (args.autostart) {
  45                     this.view(args.page);
  46                 }
  47                 // hide toggle link
  48                 if (args.notoggle) {
  49                     Y.one('#comment-link-'+this.client_id).setStyle('display', 'none');
  50                 }
  51                 // load comments
  52                 Y.one('#comment-link-'+this.client_id).on('click', function(e) {
  53                     e.preventDefault();
  54                     this.view(0);
  55                     return false;
  56                 }, this);
  57                 CommentHelper.confirmoverlay = new Y.Overlay({
  58 bodyContent: '<a href="#" id="confirmdelete-'+this.client_id+'">'+M.str.moodle.yes+'</a> <a href="#" id="canceldelete-'+this.client_id+'">'+M.str.moodle.no+'</a>',
  59                                         visible: false
  60                                         });
  61                 CommentHelper.confirmoverlay.render(document.body);
  62             },
  63             post: function() {
  64                 var ta = Y.one('#dlg-content-'+this.client_id);
  65                 var scope = this;
  66                 var value = ta.get('value');
  67                 if (value && value != M.str.moodle.addcomment) {
  68                     var params = {'content': value};
  69                     this.request({
  70                         action: 'add',
  71                         scope: scope,
  72                         params: params,
  73                         callback: function(id, obj, args) {
  74                             var scope = args.scope;
  75                             var cid = scope.client_id;
  76                             var ta = Y.one('#dlg-content-'+cid);
  77                             ta.set('value', '');
  78                             var container = Y.one('#comment-list-'+cid);
  79                             var result = scope.render([obj], true);
  80                             var newcomment = Y.Node.create(result.html);
  81                             container.appendChild(newcomment);
  82                             var ids = result.ids;
  83                             var linktext = Y.one('#comment-link-text-'+cid);
  84                             linktext.set('innerHTML', M.str.moodle.comments + ' ('+obj.count+')');
  85                             for(var i in ids) {
  86                                 var attributes = {
  87                                     color: { to: '#06e' },
  88                                     backgroundColor: { to: '#FFE390' }
  89                                 };
  90                                 var anim = new YAHOO.util.ColorAnim(ids[i], attributes);
  91                                 anim.animate();
  92                             }
  93                             scope.register_pagination();
  94                             scope.register_delete_buttons();
  95                         }
  96                     }, true);
  97                 } else {
  98                     var attributes = {
  99                         backgroundColor: { from: '#FFE390', to:'#FFFFFF' }
 100                     };
 101                     var anim = new YAHOO.util.ColorAnim('dlg-content-'+cid, attributes);
 102                     anim.animate();
 103                 }
 104             },
 105             request: function(args, noloading) {
 106                 var params = {};
 107                 var scope = this;
 108                 if (args['scope']) {
 109                     scope = args['scope'];
 110                 }
 111                 //params['page'] = args.page?args.page:'';
 112                 params['env']       = '';
 113                 // the form element only accept certain file types
 114                 params['sesskey']   = M.cfg.sesskey;
 115                 params['action']    = args.action?args.action:'';
 116                 params['client_id'] = this.client_id;
 117                 params['itemid']    = this.itemid;
 118                 params['area']      = this.commentarea;
 119                 params['courseid']  = this.courseid;
 120                 params['contextid'] = this.contextid;
 121                 if (args['params']) {
 122                     for (i in args['params']) {
 123                         params[i] = args['params'][i];
 124                     }
 125                 }
 126                 var cfg = {
 127                     method: 'POST',
 128                     on: {
 129                         complete: function(id,o,p) {
 130                             if (!o) {
 131                                 alert('IO FATAL');
 132                                 return false;
 133                             }
 134                             var data = Y.JSON.parse(o.responseText);
 135                             if (data.error) {
 136                                 alert(data.error);
 137                                 return false;
 138                             } else {
 139                                 args.callback(id,data,p);
 140                                 return true;
 141                             }
 142                         }
 143                     },
 144                     arguments: {
 145                         scope: scope
 146                     },
 147                     headers: {
 148                         'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
 149                         'User-Agent': 'MoodleComment/3.0'
 150                     },
 151                     data: build_querystring(params)
 152                 };
 153                 if (args.form) {
 154                     cfg.form = args.form;
 155                 }
 156                 Y.io(this.api, cfg);
 157                 if (!noloading) {
 158                     this.wait();
 159                 }
 160             },
 161             render: function(list, newcmt) {
 162                 var ret = {};
 163                 ret.ids = [];
 164                 var template = Y.one('#cmt-tmpl');
 165                 var html = '';
 166                 for(var i in list) {
 167                     var htmlid = 'comment-'+list[i].id+'-'+this.client_id;
 168                     var val = template.get('innerHTML');
 169                     val = val.replace('___name___', list[i].username);
 170                     if (list[i]['delete']||newcmt) {
 171                         list[i].content = '<div class="comment-delete"><a href="#" id ="comment-delete-'+this.client_id+'-'+list[i].id+'" title="'+M.str.moodle.deletecomment+'"><img src="'+M.util.image_url('t/delete', 'core')+'" /></a></div>' + list[i].content;
 172                     }
 173                     val = val.replace('___time___', list[i].time);
 174                     val = val.replace('___picture___', list[i].avatar);
 175                     val = val.replace('___content___', list[i].content);
 176                     val = '<li id="'+htmlid+'">'+val+'</li>';
 177                     ret.ids.push(htmlid);
 178                     html = (val+html);
 179                 }
 180                 ret.html = html;
 181                 return ret;
 182             },
 183             load: function(page) {
 184                 var scope = this;
 185                 var container = Y.one('#comment-ctrl-'+this.client_id);
 186                 var params = {
 187                     'page': page
 188                 }
 189                 this.request({
 190                     scope: scope,
 191                     params: params,
 192                     callback: function(id, ret, args) {
 193                         var linktext = Y.one('#comment-link-text-'+scope.client_id);
 194                         linktext.set('innerHTML', M.str.moodle.comments + ' ('+ret.count+')');
 195                         var container = Y.one('#comment-list-'+scope.client_id);
 196                         var pagination = Y.one('#comment-pagination-'+scope.client_id);
 197                         if (ret.pagination) {
 198                             pagination.set('innerHTML', ret.pagination);
 199                         } else {
 200                             //empty paging bar
 201                             pagination.set('innerHTML', '');
 202                         }
 203                         var result = scope.render(ret.list);
 204                         container.set('innerHTML', result.html);
 205                         args.scope.register_pagination();
 206                         args.scope.register_delete_buttons();
 207                     }
 208                 });
 209             },
 210
 211             dodelete: function(id) { // note: delete is a reserved word in javascript, chrome and safary do not like it at all here!
 212                 var scope = this;
 213                 var params = {'commentid': id};
 214                 scope.cancel_delete();
 215                 function remove_dom(type, anmi, cmt) {
 216                     cmt.remove();
 217                 }
 218                 this.request({
 219                     action: 'delete',
 220                     scope: scope,
 221                     params: params,
 222                     callback: function(id, resp, args) {
 223                         var htmlid= 'comment-'+resp.commentid+'-'+resp.client_id;
 224                         var attributes = {
 225                             width:{to:0},
 226                             height:{to:0}
 227                         };
 228                         var cmt = Y.one('#'+htmlid);
 229                         cmt.setStyle('overflow', 'hidden');
 230                         var anim = new YAHOO.util.Anim(htmlid, attributes, 1, YAHOO.util.Easing.easeOut);
 231                         anim.onComplete.subscribe(remove_dom, cmt, this);
 232                         anim.animate();
 233                     }
 234                 }, true);
 235             },
 236             register_actions: function() {
 237                 // add new comment
 238                 Y.one('#comment-action-post-'+this.client_id).on('click', function(e) {
 239                     e.preventDefault();
 240                     this.post();
 241                     return false;
 242                 }, this);
 243                 // cancel comment box
 244                 var cancel = Y.one('#comment-action-cancel-'+this.client_id);
 245                 if (cancel) {
 246                     cancel.on('click', function(e) {
 247                         e.preventDefault();
 248                         this.view(0);
 249                         return false;
 250                     }, this);
 251                 }
 252             },
 253             register_delete_buttons: function() {
 254                 var scope = this;
 255                 // page buttons
 256                 Y.all('div.comment-delete a').each(
 257                     function(node, id) {
 258                         var theid = node.get('id');
 259                         var parseid = new RegExp("comment-delete-"+scope.client_id+"-(\\d+)", "i");
 260                         var commentid = theid.match(parseid);
 261                         if (commentid[1]) {
 262                             Y.Event.purgeElement('#'+theid, false, 'click');
 263                         }
 264                         node.on('click', function(e, node) {
 265                                                         e.preventDefault();
 266                             var width = CommentHelper.confirmoverlay.bodyNode.getStyle('width');
 267                             var re = new RegExp("(\\d+).*", "i");
 268                             var result = width.match(re);
 269                             if (result[1]) {
 270                                 width = Number(result[1]);
 271                             } else {
 272                                 width = 0;
 273                             }
 274                             CommentHelper.confirmoverlay.set('xy', [e.pageX-(width/2), e.pageY+10]);
 275                             CommentHelper.confirmoverlay.set('visible', true);
 276                                                         // XXX: YUI3 bug, a temp workaround in firefox, still have problem on webkit
 277                                                         CommentHelper.confirmoverlay.bodyNode.setStyle('visibility', 'visible');
 278                             Y.one('#canceldelete-'+scope.client_id).on('click', function(e) {
 279                                                                 e.preventDefault();
 280                                 scope.cancel_delete();
 281                                 });
 282                             Y.Event.purgeElement('#confirmdelete-'+scope.client_id, false, 'click');
 283                             Y.one('#confirmdelete-'+scope.client_id).on('click', function(e) {
 284                                                                         e.preventDefault();
 285                                     if (commentid[1]) {
 286                                         scope.dodelete(commentid[1]);
 287                                     }
 288                                 });
 289                         }, scope, node);
 290                     }
 291                 );
 292             },
 293             cancel_delete: function() {
 294                 CommentHelper.confirmoverlay.set('visible', false);
 295                                 // XXX: YUI3 bug, a temp workaround in firefox, still have problem on webkit
 296                                 CommentHelper.confirmoverlay.bodyNode.setStyle('visibility', 'hidden');
 297             },
 298             register_pagination: function() {
 299                 var scope = this;
 300                 // page buttons
 301                 Y.all('#comment-pagination-'+this.client_id+' a').each(
 302                     function(node, id) {
 303                         node.on('click', function(e, node) {
 304                                                         e.preventDefault();
 305                             var id = node.get('id');
 306                             var re = new RegExp("comment-page-"+this.client_id+"-(\\d+)", "i");
 307                             var result = id.match(re);
 308                             this.load(result[1]);
 309                         }, scope, node);
 310                     }
 311                 );
 312             },
 313             view: function(page) {
 314                 var container = Y.one('#comment-ctrl-'+this.client_id);
 315                 var ta = Y.one('#dlg-content-'+this.client_id);
 316                 var img = Y.one('#comment-img-'+this.client_id);
 317                 var d = container.getStyle('display');
 318                 if (d=='none'||d=='') {
 319                     // show
 320                     if (this.env != 'block_comments') {
 321                         this.load(page);
 322                     } else {
 323                         this.register_delete_buttons();
 324                         this.register_pagination();
 325                     }
 326                     container.setStyle('display', 'block');
 327                     img.src=M.util.image_url('t/expanded', 'core');
 328                 } else {
 329                     // hide
 330                     container.setStyle('display', 'none');
 331                     img.src=M.util.image_url('t/collapsed', 'core');
 332                     ta.set('value','');
 333                 }
 334                 //toggle_textarea.apply(ta, [false]);
 335                 //// reset textarea size
 336                 ta.on('click', function() {
 337                     this.toggle_textarea(true);
 338                 }, this)
 339                 //ta.onkeypress = function() {
 340                     //if (this.scrollHeight > this.clientHeight && !window.opera)
 341                         //this.rows += 1;
 342                 //}
 343                 ta.on('blur', function() {
 344                     this.toggle_textarea(false);
 345                 }, this);
 346                 this.register_actions();
 347                 return false;
 348             },
 349             toggle_textarea: function(focus) {
 350                 var t = Y.one('#dlg-content-'+this.client_id);
 351                 if (focus) {
 352                     if (t.get('value') == M.str.moodle.addcomment) {
 353                         t.set('value', '');
 354                         t.setStyle('color', 'black');
 355                     }
 356                 }else{
 357                     if (t.get('value') == '') {
 358                         t.set('value', M.str.moodle.addcomment);
 359                         t.setStyle('color','grey');
 360                         t.set('rows', 2);
 361                     }
 362                 }
 363             },
 364             wait: function() {
 365                 var container = Y.one('#comment-list-'+this.client_id);
 366                 container.set('innerHTML', '<div class="mdl-align"><img src="'+M.util.image_url('i/loading', 'core')+'" /></div>');
 367             }
 368         });
 369
 370         new CommentHelper(options);
 371     },
 372     init_admin: function(Y) {
 373         var select_all = Y.one('#comment_select_all');
 374         select_all.on('click', function(e) {
 375             var comments = document.getElementsByName('comments');
 376             var checked = false;
 377             for (var i in comments) {
 378                 if (comments[i].checked) {
 379                     checked=true;
 380                 }
 381             }
 382             for (i in comments) {
 383                 comments[i].checked = !checked;
 384             }
 385             this.set('checked', !checked);
 386         });
 387
 388         var comments_delete = Y.one('#comments_delete');
 389         if (comments_delete) {
 390             comments_delete.on('click', function(e) {
 391                 e.preventDefault();
 392                 var list = '';
 393                 var comments = document.getElementsByName('comments');
 394                 for (var i in comments) {
 395                     if (typeof comments[i] == 'object' && comments[i].checked) {
 396                         list += (comments[i].value + '-');
 397                     }
 398                 }
 399                 if (!list) {
 400                     return;
 401                 }
 402                 var args = {};
 403                 args.message = M.str.admin.confirmdeletecomments;
 404                 args.callback = function() {
 405                     var url = M.cfg.wwwroot + '/comment/index.php';
 406
 407                     var data = {
 408                         'commentids': list,
 409                         'sesskey': M.cfg.sesskey,
 410                         'action': 'delete'
 411                     }
 412                     var cfg = {
 413                         method: 'POST',
 414                         on: {
 415                             complete: function(id,o,p) {
 416                                 if (!o) {
 417                                     alert('IO FATAL');
 418                                     return;
 419                                 }
 420                                 if (o.responseText == 'yes') {
 421                                     location.reload();
 422                                 }
 423                             }
 424                         },
 425                         arguments: {
 426                             scope: this
 427                         },
 428                         headers: {
 429                             'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
 430                             'User-Agent': 'MoodleComment/3.0'
 431                         },
 432                         data: build_querystring(data)
 433                     };
 434                     Y.io(url, cfg);
 435                 }
 436                 M.util.show_confirm_dialog(e, args);
 437             });
 438         }
 439     }
 440 };