js/util.js

   1 /*
   2  * StatusNet - a distributed open-source microblogging tool
   3  * Copyright (C) 2008, StatusNet, Inc.
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU Affero General Public License as published by
   7  * the Free Software Foundation, either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU Affero General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Affero General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * @category  UI interaction
  19  * @package   StatusNet
  20  * @author    Sarven Capadisli <csarven@status.net>
  21  * @author    Evan Prodromou <evan@status.net>
  22  * @author    Brion Vibber <brion@status.net>
  23  * @copyright 2009,2010 StatusNet, Inc.
  24  * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
  25  * @link      http://status.net/
  26  */
  27
  28 var SN = { // StatusNet
  29     C: { // Config
  30         I: { // Init
  31             CounterBlackout: false,
  32             MaxLength: 140,
  33             PatternUsername: /^[0-9a-zA-Z\-_.]*$/,
  34             HTTP20x30x: [200, 201, 202, 203, 204, 205, 206, 300, 301, 302, 303, 304, 305, 306, 307],
  35             NoticeFormMaster: null // to be cloned from the one at top
  36         },
  37
  38         /**
  39          * @fixme are these worth the trouble? They seem to mostly just duplicate
  40          * themselves while slightly obscuring the actual selector, so it's hard
  41          * to pop over to the HTML and find something.
  42          *
  43          * In theory, minification could reduce them to shorter variable names,
  44          * but at present that doesn't happen with yui-compressor.
  45          */
  46         S: { // Selector
  47             Disabled: 'disabled',
  48             Warning: 'warning',
  49             Error: 'error',
  50             Success: 'success',
  51             Processing: 'processing',
  52             CommandResult: 'command_result',
  53             FormNotice: 'form_notice',
  54             NoticeDataGeo: 'notice_data-geo',
  55             NoticeDataGeoCookie: 'NoticeDataGeo',
  56             NoticeDataGeoSelected: 'notice_data-geo_selected',
  57             StatusNetInstance: 'StatusNetInstance'
  58         }
  59     },
  60
  61     /**
  62      * Map of localized message strings exported to script from the PHP
  63      * side via Action::getScriptMessages().
  64      *
  65      * Retrieve them via SN.msg(); this array is an implementation detail.
  66      *
  67      * @access private
  68      */
  69     messages: {},
  70
  71     /**
  72      * Grabs a localized string that's been previously exported to us
  73      * from server-side code via Action::getScriptMessages().
  74      *
  75      * @example alert(SN.msg('coolplugin-failed'));
  76      *
  77      * @param {String} key: string key name to pull from message index
  78      * @return matching localized message string
  79      */
  80     msg: function (key) {
  81         if (SN.messages[key] === undefined) {
  82             return '[' + key + ']';
  83         }
  84         return SN.messages[key];
  85     },
  86
  87     U: { // Utils
  88         /**
  89          * Setup function -- DOES NOT trigger actions immediately.
  90          *
  91          * Sets up event handlers on the new notice form.
  92          *
  93          * @param {jQuery} form: jQuery object whose first matching element is the form
  94          * @access private
  95          */
  96         FormNoticeEnhancements: function (form) {
  97             if (jQuery.data(form[0], 'ElementData') === undefined) {
  98                 var MaxLength = form.find('.count').text();
  99                 if (MaxLength === undefined) {
 100                     MaxLength = SN.C.I.MaxLength;
 101                 }
 102                 jQuery.data(form[0], 'ElementData', {MaxLength: MaxLength});
 103
 104                 SN.U.Counter(form);
 105
 106                 var NDT = form.find('.notice_data-text:first');
 107
 108                 NDT.on('keyup', function (e) {
 109                     SN.U.Counter(form);
 110                 });
 111
 112                 var delayedUpdate = function (e) {
 113                     // Cut and paste events fire *before* the operation,
 114                     // so we need to trigger an update in a little bit.
 115                     // This would be so much easier if the 'change' event
 116                     // actually fired every time the value changed. :P
 117                     window.setTimeout(function () {
 118                         SN.U.Counter(form);
 119                     }, 50);
 120                 };
 121                 // Note there's still no event for mouse-triggered 'delete'.
 122                 NDT.on('cut', delayedUpdate)
 123                     .on('paste', delayedUpdate);
 124             } else {
 125                 form.find('.count').text(jQuery.data(form[0], 'ElementData').MaxLength);
 126             }
 127         },
 128
 129         /**
 130          * To be called from event handlers on the notice import form.
 131          * Triggers an update of the remaining-characters counter.
 132          *
 133          * Additional counter updates will be suppressed during the
 134          * next half-second to avoid flooding the layout engine with
 135          * updates, followed by another automatic check.
 136          *
 137          * The maximum length is pulled from data established by
 138          * FormNoticeEnhancements.
 139          *
 140          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 141          * @access private
 142          */
 143         Counter: function (form) {
 144             SN.C.I.FormNoticeCurrent = form;
 145
 146             var MaxLength = jQuery.data(form[0], 'ElementData').MaxLength;
 147
 148             if (MaxLength <= 0) {
 149                 return;
 150             }
 151
 152             var remaining = MaxLength - SN.U.CharacterCount(form);
 153             var counter = form.find('.count');
 154
 155             if (remaining.toString() != counter.text()) {
 156                 if (!SN.C.I.CounterBlackout || remaining === 0) {
 157                     if (counter.text() != String(remaining)) {
 158                         counter.text(remaining);
 159                     }
 160                     if (remaining < 0) {
 161                         form.addClass(SN.C.S.Warning);
 162                     } else {
 163                         form.removeClass(SN.C.S.Warning);
 164                     }
 165                     // Skip updates for the next 500ms.
 166                     // On slower hardware, updating on every keypress is unpleasant.
 167                     if (!SN.C.I.CounterBlackout) {
 168                         SN.C.I.CounterBlackout = true;
 169                         SN.C.I.FormNoticeCurrent = form;
 170                         window.setTimeout("SN.U.ClearCounterBlackout(SN.C.I.FormNoticeCurrent);", 500);
 171                     }
 172                 }
 173             }
 174         },
 175
 176         /**
 177          * Pull the count of characters in the current edit field.
 178          * Plugins replacing the edit control may need to override this.
 179          *
 180          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 181          * @return number of chars
 182          */
 183         CharacterCount: function (form) {
 184             return form.find('.notice_data-text:first').val().length;
 185         },
 186
 187         /**
 188          * Called internally after the counter update blackout period expires;
 189          * runs another update to make sure we didn't miss anything.
 190          *
 191          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 192          * @access private
 193          */
 194         ClearCounterBlackout: function (form) {
 195             // Allow keyup events to poke the counter again
 196             SN.C.I.CounterBlackout = false;
 197             // Check if the string changed since we last looked
 198             SN.U.Counter(form);
 199         },
 200
 201         /**
 202          * Helper function to rewrite default HTTP form action URLs to HTTPS
 203          * so we can actually fetch them when on an SSL page in ssl=sometimes
 204          * mode.
 205          *
 206          * It would be better to output URLs that didn't hardcode protocol
 207          * and hostname in the first place...
 208          *
 209          * @param {String} url
 210          * @return string
 211          */
 212         RewriteAjaxAction: function (url) {
 213             // Quick hack: rewrite AJAX submits to HTTPS if they'd fail otherwise.
 214             if (document.location.protocol === 'https:' && url.substr(0, 5) === 'http:') {
 215                 return url.replace(/^http:\/\/[^:\/]+/, 'https://' + document.location.host);
 216             }
 217             return url;
 218         },
 219
 220         /**
 221          * Grabs form data and submits it asynchronously, with 'ajax=1'
 222          * parameter added to the rest.
 223          *
 224          * If a successful response includes another form, that form
 225          * will be extracted and copied in, replacing the original form.
 226          * If there's no form, the first paragraph will be used.
 227          *
 228          * This will automatically be applied on the 'submit' event for
 229          * any form with the 'ajax' class.
 230          *
 231          * @fixme can sometimes explode confusingly if returnd data is bogus
 232          * @fixme error handling is pretty vague
 233          * @fixme can't submit file uploads
 234          *
 235          * @param {jQuery} form: jQuery object whose first element is a form
 236          * @param function onSuccess: something extra to do on success
 237          *
 238          * @access public
 239          */
 240         FormXHR: function (form, onSuccess) {
 241             $.ajax({
 242                 type: 'POST',
 243                 dataType: 'xml',
 244                 url: SN.U.RewriteAjaxAction(form.attr('action')),
 245                 data: form.serialize() + '&ajax=1',
 246                 beforeSend: function (xhr) {
 247                     form
 248                         .addClass(SN.C.S.Processing)
 249                         .find('.submit')
 250                             .addClass(SN.C.S.Disabled)
 251                             .prop(SN.C.S.Disabled, true);
 252                 },
 253                 error: function (xhr, textStatus, errorThrown) {
 254                     // If the server end reported an error from StatusNet,
 255                     // find it -- otherwise we'll see what was reported
 256                     // from the browser.
 257                     var errorReported = null;
 258                     if (xhr.responseXML) {
 259                         errorReported = $('#error', xhr.responseXML).text();
 260                     }
 261                     window.alert(errorReported || errorThrown || textStatus);
 262
 263                     // Restore the form to original state.
 264                     // Hopefully. :D
 265                     form
 266                         .removeClass(SN.C.S.Processing)
 267                         .find('.submit')
 268                             .removeClass(SN.C.S.Disabled)
 269                             .prop(SN.C.S.Disabled, false);
 270                 },
 271                 success: function (data, textStatus) {
 272                     if ($('form', data)[0] !== undefined) {
 273                         var form_new = document._importNode($('form', data)[0], true);
 274                         form.replaceWith(form_new);
 275                         if (onSuccess) {
 276                             onSuccess();
 277                         }
 278                     } else if ($('p', data)[0] !== undefined) {
 279                         form.replaceWith(document._importNode($('p', data)[0], true));
 280                         if (onSuccess) {
 281                             onSuccess();
 282                         }
 283                     } else {
 284                         window.alert('Unknown error.');
 285                     }
 286                 }
 287             });
 288         },
 289
 290         /**
 291          * Setup function -- DOES NOT trigger actions immediately.
 292          *
 293          * Sets up event handlers for special-cased async submission of the
 294          * notice-posting form, including some pre-post validation.
 295          *
 296          * Unlike FormXHR() this does NOT submit the form immediately!
 297          * It sets up event handlers so that any method of submitting the
 298          * form (click on submit button, enter, submit() etc) will trigger
 299          * it properly.
 300          *
 301          * Also unlike FormXHR(), this system will use a hidden iframe
 302          * automatically to handle file uploads via <input type="file">
 303          * controls.
 304          *
 305          * @fixme tl;dr
 306          * @fixme vast swaths of duplicate code and really long variable names clutter this function up real bad
 307          * @fixme error handling is unreliable
 308          * @fixme cookieValue is a global variable, but probably shouldn't be
 309          * @fixme saving the location cache cookies should be split out
 310          * @fixme some error messages are hardcoded english: needs i18n
 311          * @fixme special-case for bookmarklet is confusing and uses a global var "self". Is this ok?
 312          *
 313          * @param {jQuery} form: jQuery object whose first element is a form
 314          *
 315          * @access public
 316          */
 317         FormNoticeXHR: function (form) {
 318             SN.C.I.NoticeDataGeo = {};
 319             form.append('<input type="hidden" name="ajax" value="1"/>');
 320
 321             // Make sure we don't have a mixed HTTP/HTTPS submission...
 322             form.attr('action', SN.U.RewriteAjaxAction(form.attr('action')));
 323
 324             /**
 325              * Show a response feedback bit under the new-notice dialog.
 326              *
 327              * @param {String} cls: CSS class name to use ('error' or 'success')
 328              * @param {String} text
 329              * @access private
 330              */
 331             var showFeedback = function (cls, text) {
 332                 form.append(
 333                     $('<p class="form_response"></p>')
 334                         .addClass(cls)
 335                         .text(text)
 336                 );
 337             };
 338
 339             /**
 340              * Hide the previous response feedback, if any.
 341              */
 342             var removeFeedback = function () {
 343                 form.find('.form_response').remove();
 344             };
 345
 346             form.ajaxForm({
 347                 dataType: 'xml',
 348                 timeout: '60000',
 349                 beforeSend: function (formData) {
 350                     if (form.find('.notice_data-text:first').val() == '') {
 351                         form.addClass(SN.C.S.Warning);
 352                         return false;
 353                     }
 354                     form
 355                         .addClass(SN.C.S.Processing)
 356                         .find('.submit')
 357                             .addClass(SN.C.S.Disabled)
 358                             .prop(SN.C.S.Disabled, true);
 359
 360                     SN.U.normalizeGeoData(form);
 361
 362                     return true;
 363                 },
 364                 error: function (xhr, textStatus, errorThrown) {
 365                     form
 366                         .removeClass(SN.C.S.Processing)
 367                         .find('.submit')
 368                             .removeClass(SN.C.S.Disabled)
 369                             .prop(SN.C.S.Disabled, false);
 370                     removeFeedback();
 371                     if (textStatus == 'timeout') {
 372                         // @fixme i18n
 373                         showFeedback('error', 'Sorry! We had trouble sending your notice. The servers are overloaded. Please try again, and contact the site administrator if this problem persists.');
 374                     } else {
 375                         var response = SN.U.GetResponseXML(xhr);
 376                         if ($('.' + SN.C.S.Error, response).length > 0) {
 377                             form.append(document._importNode($('.' + SN.C.S.Error, response)[0], true));
 378                         } else {
 379                             if (parseInt(xhr.status) === 0 || jQuery.inArray(parseInt(xhr.status), SN.C.I.HTTP20x30x) >= 0) {
 380                                 form
 381                                     .resetForm()
 382                                     .find('.attach-status').remove();
 383                                 SN.U.FormNoticeEnhancements(form);
 384                             } else {
 385                                 // @fixme i18n
 386                                 showFeedback('error', '(Sorry! We had trouble sending your notice (' + xhr.status + ' ' + xhr.statusText + '). Please report the problem to the site administrator if this happens again.');
 387                             }
 388                         }
 389                     }
 390                 },
 391                 success: function (data, textStatus) {
 392                     removeFeedback();
 393                     var errorResult = $('#' + SN.C.S.Error, data);
 394                     if (errorResult.length > 0) {
 395                         showFeedback('error', errorResult.text());
 396                     } else {
 397                         if ($('body')[0].id == 'bookmarklet') {
 398                             // @fixme self is not referenced anywhere?
 399                             self.close();
 400                         }
 401
 402                         var commandResult = $('#' + SN.C.S.CommandResult, data);
 403                         if (commandResult.length > 0) {
 404                             showFeedback('success', commandResult.text());
 405                         } else {
 406                             // New notice post was successful. If on our timeline, show it!
 407                             var notice = document._importNode($('li', data)[0], true);
 408                             var notices = $('#notices_primary .notices:first');
 409                             var replyItem = form.closest('li.notice-reply');
 410
 411                             if (replyItem.length > 0) {
 412                                 // If this is an inline reply, remove the form...
 413                                 var list = form.closest('.threaded-replies');
 414                                 var placeholder = list.find('.notice-reply-placeholder');
 415                                 replyItem.remove();
 416
 417                                 var id = $(notice).attr('id');
 418                                 if ($('#' + id).length == 0) {
 419                                     $(notice).insertBefore(placeholder);
 420                                 } // else Realtime came through before us...
 421
 422                                 // ...and show the placeholder form.
 423                                 placeholder.show();
 424                             } else if (notices.length > 0 && SN.U.belongsOnTimeline(notice)) {
 425                                 // Not a reply. If on our timeline, show it at the top!
 426
 427                                 if ($('#' + notice.id).length === 0) {
 428                                     var notice_irt_value = form.find('[name=inreplyto]').val();
 429                                     var notice_irt = '#notices_primary #notice-' + notice_irt_value;
 430                                     if ($('body')[0].id == 'conversation') {
 431                                         if (notice_irt_value.length > 0 && $(notice_irt + ' .notices').length < 1) {
 432                                             $(notice_irt).append('<ul class="notices"></ul>');
 433                                         }
 434                                         $($(notice_irt + ' .notices')[0]).append(notice);
 435                                     } else {
 436                                         notices.prepend(notice);
 437                                     }
 438                                     $('#' + notice.id)
 439                                         .css({display: 'none'})
 440                                         .fadeIn(2500);
 441                                     SN.U.NoticeWithAttachment($('#' + notice.id));
 442                                     SN.U.switchInputFormTab("placeholder");
 443                                 }
 444                             } else {
 445                                 // Not on a timeline that this belongs on?
 446                                 // Just show a success message.
 447                                 // @fixme inline
 448                                 showFeedback('success', $('title', data).text());
 449                             }
 450                         }
 451                         form.resetForm();
 452                         form.find('[name=inreplyto]').val('');
 453                         form.find('.attach-status').remove();
 454                         SN.U.FormNoticeEnhancements(form);
 455                     }
 456                 },
 457                 complete: function (xhr, textStatus) {
 458                     form
 459                         .removeClass(SN.C.S.Processing)
 460                         .find('.submit')
 461                             .prop(SN.C.S.Disabled, false)
 462                             .removeClass(SN.C.S.Disabled);
 463
 464                     form.find('[name=lat]').val(SN.C.I.NoticeDataGeo.NLat);
 465                     form.find('[name=lon]').val(SN.C.I.NoticeDataGeo.NLon);
 466                     form.find('[name=location_ns]').val(SN.C.I.NoticeDataGeo.NLNS);
 467                     form.find('[name=location_id]').val(SN.C.I.NoticeDataGeo.NLID);
 468                     form.find('[name=notice_data-geo]').prop('checked', SN.C.I.NoticeDataGeo.NDG);
 469                 }
 470             });
 471         },
 472
 473         FormProfileSearchXHR: function (form) {
 474             $.ajax({
 475                 type: 'POST',
 476                 dataType: 'xml',
 477                 url: form.attr('action'),
 478                 data: form.serialize() + '&ajax=1',
 479                 beforeSend: function (xhr) {
 480                     form
 481                         .addClass(SN.C.S.Processing)
 482                         .find('.submit')
 483                             .addClass(SN.C.S.Disabled)
 484                             .prop(SN.C.S.Disabled, true);
 485                 },
 486                 error: function (xhr, textStatus, errorThrown) {
 487                     window.alert(errorThrown || textStatus);
 488                 },
 489                 success: function (data, textStatus) {
 490                     var results_placeholder = $('#profile_search_results');
 491                     if ($('ul', data)[0] !== undefined) {
 492                         var list = document._importNode($('ul', data)[0], true);
 493                         results_placeholder.replaceWith(list);
 494                     } else {
 495                         var _error = $('<li/>').append(document._importNode($('p', data)[0], true));
 496                         results_placeholder.html(_error);
 497                     }
 498                     form
 499                         .removeClass(SN.C.S.Processing)
 500                         .find('.submit')
 501                             .removeClass(SN.C.S.Disabled)
 502                             .prop(SN.C.S.Disabled, false);
 503                 }
 504             });
 505         },
 506
 507         FormPeopletagsXHR: function (form) {
 508             $.ajax({
 509                 type: 'POST',
 510                 dataType: 'xml',
 511                 url: form.attr('action'),
 512                 data: form.serialize() + '&ajax=1',
 513                 beforeSend: function (xhr) {
 514                     form.find('.submit')
 515                             .addClass(SN.C.S.Processing)
 516                             .addClass(SN.C.S.Disabled)
 517                             .prop(SN.C.S.Disabled, true);
 518                 },
 519                 error: function (xhr, textStatus, errorThrown) {
 520                     window.alert(errorThrown || textStatus);
 521                 },
 522                 success: function (data, textStatus) {
 523                     var results_placeholder = form.parents('.entity_tags');
 524                     if ($('.entity_tags', data)[0] !== undefined) {
 525                         var tags = document._importNode($('.entity_tags', data)[0], true);
 526                         $(tags).find('.editable').append($('<button class="peopletags_edit_button"/>'));
 527                         results_placeholder.replaceWith(tags);
 528                     } else {
 529                         results_placeholder.find('p').remove();
 530                         results_placeholder.append(document._importNode($('p', data)[0], true));
 531                         form.removeClass(SN.C.S.Processing)
 532                             .find('.submit')
 533                                 .removeClass(SN.C.S.Disabled)
 534                                 .prop(SN.C.S.Disabled, false);
 535                     }
 536                 }
 537             });
 538         },
 539
 540         normalizeGeoData: function (form) {
 541             SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val();
 542             SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val();
 543             SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val();
 544             SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val();
 545             SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').prop('checked'); // @fixme (does this still need to be fixed somehow?)
 546
 547             var cookieValue = $.cookie(SN.C.S.NoticeDataGeoCookie);
 548
 549             if (cookieValue !== undefined && cookieValue != 'disabled') {
 550                 cookieValue = JSON.parse(cookieValue);
 551                 SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val(cookieValue.NLat).val();
 552                 SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val(cookieValue.NLon).val();
 553                 if (cookieValue.NLNS) {
 554                     SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val(cookieValue.NLNS).val();
 555                     SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val(cookieValue.NLID).val();
 556                 } else {
 557                     form.find('[name=location_ns]').val('');
 558                     form.find('[name=location_id]').val('');
 559                 }
 560             }
 561             if (cookieValue == 'disabled') {
 562                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').prop('checked', false).prop('checked');
 563             } else {
 564                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').prop('checked', true).prop('checked');
 565             }
 566
 567         },
 568
 569         /**
 570          * Fetch an XML DOM from an XHR's response data.
 571          *
 572          * Works around unavailable responseXML when document.domain
 573          * has been modified by Meteor or other tools, in some but not
 574          * all browsers.
 575          *
 576          * @param {XMLHTTPRequest} xhr
 577          * @return DOMDocument
 578          */
 579         GetResponseXML: function (xhr) {
 580             try {
 581                 return xhr.responseXML;
 582             } catch (e) {
 583                 return (new DOMParser()).parseFromString(xhr.responseText, "text/xml");
 584             }
 585         },
 586
 587         /**
 588          * Setup function -- DOES NOT trigger actions immediately.
 589          *
 590          * Sets up event handlers on all visible notice's reply buttons to
 591          * tweak the new-notice form with needed variables and focus it
 592          * when pushed.
 593          *
 594          * (This replaces the default reply button behavior to submit
 595          * directly to a form which comes back with a specialized page
 596          * with the form data prefilled.)
 597          *
 598          * @access private
 599          */
 600         NoticeReply: function () {
 601             $(document).on('click', '#content .notice_reply', function (e) {
 602                 e.preventDefault();
 603                 var notice = $(this).closest('li.notice');
 604                 SN.U.NoticeInlineReplyTrigger(notice);
 605                 return false;
 606             });
 607         },
 608
 609         /**
 610          * Stub -- kept for compat with plugins for now.
 611          * @access private
 612          */
 613         NoticeReplyTo: function (notice) {
 614         },
 615
 616         /**
 617          * Open up a notice's inline reply box.
 618          *
 619          * @param {jQuery} notice: jQuery object containing one notice
 620          * @param {String} initialText
 621          */
 622         NoticeInlineReplyTrigger: function (notice, initialText) {
 623             // Find the notice we're replying to...
 624             var id = $($('.notice_id', notice)[0]).text();
 625             var replyForm, placeholder;
 626             var parentNotice = notice;
 627             var stripForm = true; // strip a couple things out of reply forms that are inline
 628
 629             // Find the threaded replies view we'll be adding to...
 630             var list = notice.closest('.notices');
 631             if (list.closest('.old-school').length) {
 632                 // We're replying to an old-school conversation thread;
 633                 // use the old-style ping into the top form.
 634                 SN.U.switchInputFormTab("status");
 635                 replyForm = $('#input_form_status').find('form');
 636                 stripForm = false;
 637             } else if (list.hasClass('threaded-replies')) {
 638                 // We're replying to a reply; use reply form on the end of this list.
 639                 // We'll add our form at the end of this; grab the root notice.
 640                 parentNotice = list.closest('.notice');
 641
 642                 // See if the form's already open...
 643                 replyForm = $('.notice-reply-form', list);
 644             } else {
 645                 // We're replying to a parent notice; pull its threaded list
 646                 // and we'll add on the end of it. Will add if needed.
 647                 list = $('ul.threaded-replies', notice);
 648                 if (list.length == 0) {
 649                     SN.U.NoticeInlineReplyPlaceholder(notice);
 650                     list = $('ul.threaded-replies', notice);
 651                 } else {
 652                     placeholder = $('li.notice-reply-placeholder', notice);
 653                     if (placeholder.length == 0) {
 654                         SN.U.NoticeInlineReplyPlaceholder(notice);
 655                     }
 656                 }
 657
 658                 // See if the form's already open...
 659                 replyForm = $('.notice-reply-form', list);
 660             }
 661
 662             var nextStep = function () {
 663                 // Override...?
 664                 replyForm.find('input[name=inreplyto]').val(id);
 665                 if (stripForm) {
 666                     // Don't do this for old-school reply form, as they don't come back!
 667                     replyForm.find('#notice_to').prop('disabled', true).hide();
 668                     replyForm.find('#notice_private').prop('disabled', true).hide();
 669                     replyForm.find('label[for=notice_to]').hide();
 670                     replyForm.find('label[for=notice_private]').hide();
 671                 }
 672
 673                 // Set focus...
 674                 var text = replyForm.find('textarea');
 675                 if (text.length == 0) {
 676                     throw "No textarea";
 677                 }
 678                 var replyto = '';
 679                 if (initialText) {
 680                     replyto = initialText + ' ';
 681                 }
 682                 text.val(replyto + text.val().replace(new RegExp(replyto, 'i'), ''));
 683                 text.data('initialText', $.trim(initialText));
 684                 text.focus();
 685                 if (text[0].setSelectionRange) {
 686                     var len = text.val().length;
 687                     text[0].setSelectionRange(len, len);
 688                 }
 689             };
 690             if (replyForm.length > 0) {
 691                 // Update the existing form...
 692                 nextStep();
 693             } else {
 694                 // Hide the placeholder...
 695                 placeholder = list.find('li.notice-reply-placeholder').hide();
 696
 697                 // Create the reply form entry at the end
 698                 var replyItem = $('li.notice-reply', list);
 699                 if (replyItem.length == 0) {
 700                     replyItem = $('<li class="notice-reply"></li>');
 701
 702                     var intermediateStep = function (formMaster) {
 703                         var formEl = document._importNode(formMaster, true);
 704                         replyItem.append(formEl);
 705                         list.append(replyItem); // *after* the placeholder
 706
 707                         var form = $(formEl);
 708                         replyForm = form;
 709                         SN.Init.NoticeFormSetup(form);
 710
 711                         nextStep();
 712                     };
 713                     if (SN.C.I.NoticeFormMaster) {
 714                         // We've already saved a master copy of the form.
 715                         // Clone it in!
 716                         intermediateStep(SN.C.I.NoticeFormMaster);
 717                     } else {
 718                         // Fetch a fresh copy of the notice form over AJAX.
 719                         // Warning: this can have a delay, which looks bad.
 720                         // @fixme this fallback may or may not work
 721                         var url = $('#form_notice').attr('action');
 722                         $.get(url, {ajax: 1}, function (data, textStatus, xhr) {
 723                             intermediateStep($('form', data)[0]);
 724                         });
 725                     }
 726                 }
 727             }
 728         },
 729
 730         NoticeInlineReplyPlaceholder: function (notice) {
 731             var list = notice.find('ul.threaded-replies');
 732             if (list.length == 0) {
 733                 list = $('<ul class="notices threaded-replies xoxo"></ul>');
 734                 notice.append(list);
 735                 list = notice.find('ul.threaded-replies');
 736             }
 737             var placeholder = $('<li class="notice-reply-placeholder">' +
 738                                     '<input class="placeholder" />' +
 739                                 '</li>');
 740             placeholder.find('input')
 741                 .val(SN.msg('reply_placeholder'));
 742             list.append(placeholder);
 743         },
 744
 745         /**
 746          * Setup function -- DOES NOT apply immediately.
 747          *
 748          * Sets up event handlers for inline reply mini-form placeholders.
 749          * Uses 'on' rather than 'live' or 'bind', so applies to future as well as present items.
 750          */
 751         NoticeInlineReplySetup: function () {
 752             $('li.notice-reply-placeholder input')
 753                 .on('focus', function () {
 754                     var notice = $(this).closest('li.notice');
 755                     SN.U.NoticeInlineReplyTrigger(notice);
 756                     return false;
 757                 });
 758             $('li.notice-reply-comments a')
 759                 .on('click', function () {
 760                     var url = $(this).attr('href');
 761                     var area = $(this).closest('.threaded-replies');
 762                     $.get(url, {ajax: 1}, function (data, textStatus, xhr) {
 763                         var replies = $('.threaded-replies', data);
 764                         if (replies.length) {
 765                             area.replaceWith(document._importNode(replies[0], true));
 766                         }
 767                     });
 768                     return false;
 769                 });
 770         },
 771
 772         /**
 773          * Setup function -- DOES NOT trigger actions immediately.
 774          *
 775          * Sets up event handlers for repeat forms to toss up a confirmation
 776          * popout before submitting.
 777          *
 778          * Uses 'on' rather than 'live' or 'bind', so applies to future as well as present items.
 779          *
 780          */
 781         NoticeRepeat: function () {
 782             $('.form_repeat').on('click', function (e) {
 783                 e.preventDefault();
 784
 785                 SN.U.NoticeRepeatConfirmation($(this));
 786                 return false;
 787             });
 788         },
 789
 790         /**
 791          * Shows a confirmation dialog box variant of the repeat button form.
 792          * This seems to use a technique where the repeat form contains
 793          * _both_ a standalone button _and_ text and buttons for a dialog.
 794          * The dialog will close after its copy of the form is submitted,
 795          * or if you click its 'close' button.
 796          *
 797          * The dialog is created by duplicating the original form and changing
 798          * its style; while clever, this is hard to generalize and probably
 799          * duplicates a lot of unnecessary HTML output.
 800          *
 801          * @fixme create confirmation dialogs through a generalized interface
 802          * that can be reused instead of hardcoded text and styles.
 803          *
 804          * @param {jQuery} form
 805          */
 806         NoticeRepeatConfirmation: function (form) {
 807             var submit_i = form.find('.submit');
 808
 809             var submit = submit_i.clone();
 810             submit
 811                 .addClass('submit_dialogbox')
 812                 .removeClass('submit');
 813             form.append(submit);
 814             submit.on('click', function () { SN.U.FormXHR(form); return false; });
 815
 816             submit_i.hide();
 817
 818             form
 819                 .addClass('dialogbox')
 820                 .append('<button class="close">&#215;</button>')
 821                 .closest('.notice-options')
 822                     .addClass('opaque');
 823
 824             form.find('button.close').click(function () {
 825                 $(this).remove();
 826
 827                 form
 828                     .removeClass('dialogbox')
 829                     .closest('.notice-options')
 830                         .removeClass('opaque');
 831
 832                 form.find('.submit_dialogbox').remove();
 833                 form.find('.submit').show();
 834
 835                 return false;
 836             });
 837         },
 838
 839         /**
 840          * Setup function -- DOES NOT trigger actions immediately.
 841          *
 842          * Goes through all notices currently displayed and sets up attachment
 843          * handling if needed.
 844          */
 845         NoticeAttachments: function () {
 846             $('.notice a.attachment').each(function () {
 847                 SN.U.NoticeWithAttachment($(this).closest('.notice'));
 848             });
 849         },
 850
 851         /**
 852          * Setup function -- DOES NOT trigger actions immediately.
 853          *
 854          * Sets up special attachment link handling if needed. Currently this
 855          * consists only of making the "more" button used for OStatus message
 856          * cropping turn into an auto-expansion button that loads the full
 857          * text from an attachment file.
 858          *
 859          * @param {jQuery} notice
 860          */
 861         NoticeWithAttachment: function (notice) {
 862             if (notice.find('.attachment').length === 0) {
 863                 return;
 864             }
 865
 866             var attachment_more = notice.find('.attachment.more');
 867             if (attachment_more.length > 0) {
 868                 $(attachment_more[0]).click(function () {
 869                     var m = $(this);
 870                     m.addClass(SN.C.S.Processing);
 871                     $.get(m.attr('href') + '/ajax', null, function (data) {
 872                         m.parent('.entry-content').html($(data).find('#attachment_view .entry-content').html());
 873                     });
 874
 875                     return false;
 876                 }).attr('title', SN.msg('showmore_tooltip'));
 877             }
 878         },
 879
 880         /**
 881          * Setup function -- DOES NOT trigger actions immediately.
 882          *
 883          * Sets up event handlers for the file-attachment widget in the
 884          * new notice form. When a file is selected, a box will be added
 885          * below the text input showing the filename and, if supported
 886          * by the browser, a thumbnail preview.
 887          *
 888          * This preview box will also allow removing the attachment
 889          * prior to posting.
 890          *
 891          * @param {jQuery} form
 892          */
 893         NoticeDataAttach: function (form) {
 894             var i;
 895             var NDA = form.find('input[type=file]');
 896             NDA.change(function (event) {
 897                 form.find('.attach-status').remove();
 898
 899                 var filename = $(this).val();
 900                 if (!filename) {
 901                     // No file -- we've been tricked!
 902                     return false;
 903                 }
 904
 905                 var attachStatus = $('<div class="attach-status ' + SN.C.S.Success + '"><code></code> <button class="close">&#215;</button></div>');
 906                 attachStatus.find('code').text(filename);
 907                 attachStatus.find('button').click(function () {
 908                     attachStatus.remove();
 909                     NDA.val('');
 910
 911                     return false;
 912                 });
 913                 form.append(attachStatus);
 914
 915                 if (typeof this.files === "object") {
 916                     // Some newer browsers will let us fetch the files for preview.
 917                     for (i = 0; i < this.files.length; i++) {
 918                         SN.U.PreviewAttach(form, this.files[i]);
 919                     }
 920                 }
 921             });
 922         },
 923
 924         /**
 925          * Get PHP's MAX_FILE_SIZE setting for this form;
 926          * used to apply client-side file size limit checks.
 927          *
 928          * @param {jQuery} form
 929          * @return int max size in bytes; 0 or negative means no limit
 930          */
 931         maxFileSize: function (form) {
 932             var max = $(form).find('input[name=MAX_FILE_SIZE]').attr('value');
 933             if (max) {
 934                 return parseInt(max);
 935             }
 936             return 0;
 937         },
 938
 939         /**
 940          * For browsers with FileAPI support: make a thumbnail if possible,
 941          * and append it into the attachment display widget.
 942          *
 943          * Known good:
 944          * - Firefox 3.6.6, 4.0b7
 945          * - Chrome 8.0.552.210
 946          *
 947          * Known ok metadata, can't get contents:
 948          * - Safari 5.0.2
 949          *
 950          * Known fail:
 951          * - Opera 10.63, 11 beta (no input.files interface)
 952          *
 953          * @param {jQuery} form
 954          * @param {File} file
 955          *
 956          * @todo use configured thumbnail size
 957          * @todo detect pixel size?
 958          * @todo should we render a thumbnail to a canvas and then use the smaller image?
 959          */
 960         PreviewAttach: function (form, file) {
 961             var tooltip = file.type + ' ' + Math.round(file.size / 1024) + 'KB';
 962             var preview = true;
 963
 964             var blobAsDataURL;
 965             if (window.createObjectURL !== undefined) {
 966                 /**
 967                  * createObjectURL lets us reference the file directly from an <img>
 968                  * This produces a compact URL with an opaque reference to the file,
 969                  * which we can reference immediately.
 970                  *
 971                  * - Firefox 3.6.6: no
 972                  * - Firefox 4.0b7: no
 973                  * - Safari 5.0.2: no
 974                  * - Chrome 8.0.552.210: works!
 975                  */
 976                 blobAsDataURL = function (blob, callback) {
 977                     callback(window.createObjectURL(blob));
 978                 };
 979             } else if (window.FileReader !== undefined) {
 980                 /**
 981                  * FileAPI's FileReader can build a data URL from a blob's contents,
 982                  * but it must read the file and build it asynchronously. This means
 983                  * we'll be passing a giant data URL around, which may be inefficient.
 984                  *
 985                  * - Firefox 3.6.6: works!
 986                  * - Firefox 4.0b7: works!
 987                  * - Safari 5.0.2: no
 988                  * - Chrome 8.0.552.210: works!
 989                  */
 990                 blobAsDataURL = function (blob, callback) {
 991                     var reader = new FileReader();
 992                     reader.onload = function (event) {
 993                         callback(reader.result);
 994                     };
 995                     reader.readAsDataURL(blob);
 996                 };
 997             } else {
 998                 preview = false;
 999             }
1000
1001             var imageTypes = ['image/png', 'image/jpeg', 'image/gif', 'image/svg+xml'];
1002             if ($.inArray(file.type, imageTypes) == -1) {
1003                 // We probably don't know how to show the file.
1004                 preview = false;
1005             }
1006
1007             var maxSize = 8 * 1024 * 1024;
1008             if (file.size > maxSize) {
1009                 // Don't kill the browser trying to load some giant image.
1010                 preview = false;
1011             }
1012
1013             if (preview) {
1014                 blobAsDataURL(file, function (url) {
1015                     var img = $('<img>')
1016                         .attr('title', tooltip)
1017                         .attr('alt', tooltip)
1018                         .attr('src', url)
1019                         .attr('style', 'height: 120px');
1020                     form.find('.attach-status').append(img);
1021                 });
1022             } else {
1023                 var img = $('<div></div>').text(tooltip);
1024                 form.find('.attach-status').append(img);
1025             }
1026         },
1027
1028         /**
1029          * Setup function -- DOES NOT trigger actions immediately.
1030          *
1031          * Initializes state for the location-lookup features in the
1032          * new-notice form. Seems to set up some event handlers for
1033          * triggering lookups and using the new values.
1034          *
1035          * @param {jQuery} form
1036          *
1037          * @fixme tl;dr
1038          * @fixme there's not good visual state update here, so users have a
1039          *        hard time figuring out if it's working or fixing if it's wrong.
1040          *
1041          */
1042         NoticeLocationAttach: function (form) {
1043             // @fixme this should not be tied to the main notice form, as there may be multiple notice forms...
1044             var NLat = form.find('[name=lat]');
1045             var NLon = form.find('[name=lon]');
1046             var NLNS = form.find('[name=location_ns]').val();
1047             var NLID = form.find('[name=location_id]').val();
1048             var NLN = ''; // @fixme
1049             var NDGe = form.find('[name=notice_data-geo]');
1050             var check = form.find('[name=notice_data-geo]');
1051             var label = form.find('label.notice_data-geo');
1052
1053             function removeNoticeDataGeo(error) {
1054                 label
1055                     .attr('title', jQuery.trim(label.text()))
1056                     .removeClass('checked');
1057
1058                 form.find('[name=lat]').val('');
1059                 form.find('[name=lon]').val('');
1060                 form.find('[name=location_ns]').val('');
1061                 form.find('[name=location_id]').val('');
1062                 form.find('[name=notice_data-geo]').prop('checked', false);
1063
1064                 $.cookie(SN.C.S.NoticeDataGeoCookie, 'disabled', { path: '/' });
1065
1066                 if (error) {
1067                     form.find('.geo_status_wrapper').removeClass('success').addClass('error');
1068                     form.find('.geo_status_wrapper .geo_status').text(error);
1069                 } else {
1070                     form.find('.geo_status_wrapper').remove();
1071                 }
1072             }
1073
1074             function getJSONgeocodeURL(geocodeURL, data) {
1075                 SN.U.NoticeGeoStatus(form, 'Looking up place name...');
1076                 $.getJSON(geocodeURL, data, function (location) {
1077                     var lns, lid, NLN_text;
1078
1079                     if (location.location_ns !== undefined) {
1080                         form.find('[name=location_ns]').val(location.location_ns);
1081                         lns = location.location_ns;
1082                     }
1083
1084                     if (location.location_id !== undefined) {
1085                         form.find('[name=location_id]').val(location.location_id);
1086                         lid = location.location_id;
1087                     }
1088
1089                     if (location.name === undefined) {
1090                         NLN_text = data.lat + ';' + data.lon;
1091                     } else {
1092                         NLN_text = location.name;
1093                     }
1094
1095                     SN.U.NoticeGeoStatus(form, NLN_text, data.lat, data.lon, location.url);
1096                     label
1097                         .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + NLN_text + ')');
1098
1099                     form.find('[name=lat]').val(data.lat);
1100                     form.find('[name=lon]').val(data.lon);
1101                     form.find('[name=location_ns]').val(lns);
1102                     form.find('[name=location_id]').val(lid);
1103                     form.find('[name=notice_data-geo]').prop('checked', true);
1104
1105                     var cookieValue = {
1106                         NLat: data.lat,
1107                         NLon: data.lon,
1108                         NLNS: lns,
1109                         NLID: lid,
1110                         NLN: NLN_text,
1111                         NLNU: location.url,
1112                         NDG: true
1113                     };
1114
1115                     $.cookie(SN.C.S.NoticeDataGeoCookie, JSON.stringify(cookieValue), { path: '/' });
1116                 });
1117             }
1118
1119             if (check.length > 0) {
1120                 if ($.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1121                     check.prop('checked', false);
1122                 } else {
1123                     check.prop('checked', true);
1124                 }
1125
1126                 var NGW = form.find('.notice_data-geo_wrap');
1127                 var geocodeURL = NGW.attr('data-api');
1128
1129                 label.attr('title', label.text());
1130
1131                 check.change(function () {
1132                     if (check.prop('checked') === true || $.cookie(SN.C.S.NoticeDataGeoCookie) === null) {
1133                         label
1134                             .attr('title', NoticeDataGeo_text.ShareDisable)
1135                             .addClass('checked');
1136
1137                         if ($.cookie(SN.C.S.NoticeDataGeoCookie) === null || $.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1138                             if (navigator.geolocation) {
1139                                 SN.U.NoticeGeoStatus(form, 'Requesting location from browser...');
1140                                 navigator.geolocation.getCurrentPosition(
1141                                     function (position) {
1142                                         form.find('[name=lat]').val(position.coords.latitude);
1143                                         form.find('[name=lon]').val(position.coords.longitude);
1144
1145                                         var data = {
1146                                             lat: position.coords.latitude,
1147                                             lon: position.coords.longitude,
1148                                             token: $('#token').val()
1149                                         };
1150
1151                                         getJSONgeocodeURL(geocodeURL, data);
1152                                     },
1153
1154                                     function (error) {
1155                                         switch(error.code) {
1156                                             case error.PERMISSION_DENIED:
1157                                                 removeNoticeDataGeo('Location permission denied.');
1158                                                 break;
1159                                             case error.TIMEOUT:
1160                                                 //$('#' + SN.C.S.NoticeDataGeo).prop('checked', false);
1161                                                 removeNoticeDataGeo('Location lookup timeout.');
1162                                                 break;
1163                                         }
1164                                     },
1165
1166                                     {
1167                                         timeout: 10000
1168                                     }
1169                                 );
1170                             } else {
1171                                 if (NLat.length > 0 && NLon.length > 0) {
1172                                     var data = {
1173                                         lat: NLat,
1174                                         lon: NLon,
1175                                         token: $('#token').val()
1176                                     };
1177
1178                                     getJSONgeocodeURL(geocodeURL, data);
1179                                 } else {
1180                                     removeNoticeDataGeo();
1181                                     check.remove();
1182                                     label.remove();
1183                                 }
1184                             }
1185                         } else {
1186                             var cookieValue = JSON.parse($.cookie(SN.C.S.NoticeDataGeoCookie));
1187
1188                             form.find('[name=lat]').val(cookieValue.NLat);
1189                             form.find('[name=lon]').val(cookieValue.NLon);
1190                             form.find('[name=location_ns]').val(cookieValue.NLNS);
1191                             form.find('[name=location_id]').val(cookieValue.NLID);
1192                             form.find('[name=notice_data-geo]').prop('checked', cookieValue.NDG);
1193
1194                             SN.U.NoticeGeoStatus(form, cookieValue.NLN, cookieValue.NLat, cookieValue.NLon, cookieValue.NLNU);
1195                             label
1196                                 .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + cookieValue.NLN + ')')
1197                                 .addClass('checked');
1198                         }
1199                     } else {
1200                         removeNoticeDataGeo();
1201                     }
1202                 }).change();
1203             }
1204         },
1205
1206         /**
1207          * Create or update a geolocation status widget in this notice posting form.
1208          *
1209          * @param {jQuery} form
1210          * @param {String} status
1211          * @param {String} lat (optional)
1212          * @param {String} lon (optional)
1213          * @param {String} url (optional)
1214          */
1215         NoticeGeoStatus: function (form, status, lat, lon, url)
1216         {
1217             var wrapper = form.find('.geo_status_wrapper');
1218             if (wrapper.length == 0) {
1219                 wrapper = $('<div class="' + SN.C.S.Success + ' geo_status_wrapper"><button class="close" style="float:right">&#215;</button><div class="geo_status"></div></div>');
1220                 wrapper.find('button.close').click(function () {
1221                     form.find('[name=notice_data-geo]').prop('checked', false).change();
1222                     return false;
1223                 });
1224                 form.append(wrapper);
1225             }
1226             var label;
1227             if (url) {
1228                 label = $('<a></a>').attr('href', url);
1229             } else {
1230                 label = $('<span></span>');
1231             }
1232             label.text(status);
1233             if (lat || lon) {
1234                 var latlon = lat + ';' + lon;
1235                 label.attr('title', latlon);
1236                 if (!status) {
1237                     label.text(latlon)
1238                 }
1239             }
1240             wrapper.find('.geo_status').empty().append(label);
1241         },
1242
1243         /**
1244          * Setup function -- DOES NOT trigger actions immediately.
1245          *
1246          * Initializes event handlers for the "Send direct message" link on
1247          * profile pages, setting it up to display a dialog box when clicked.
1248          *
1249          * Unlike the repeat confirmation form, this appears to fetch
1250          * the form _from the original link target_, so the form itself
1251          * doesn't need to be in the current document.
1252          *
1253          * @fixme breaks ability to open link in new window?
1254          */
1255         NewDirectMessage: function () {
1256             NDM = $('.entity_send-a-message a');
1257             NDM.attr({'href': NDM.attr('href') + '&ajax=1'});
1258             NDM.on('click', function () {
1259                 var NDMF = $('.entity_send-a-message form');
1260                 if (NDMF.length === 0) {
1261                     $(this).addClass(SN.C.S.Processing);
1262                     $.get(NDM.attr('href'), null, function (data) {
1263                         $('.entity_send-a-message').append(document._importNode($('form', data)[0], true));
1264                         NDMF = $('.entity_send-a-message .form_notice');
1265                         SN.U.FormNoticeXHR(NDMF);
1266                         SN.U.FormNoticeEnhancements(NDMF);
1267                         NDMF.append('<button class="close">&#215;</button>');
1268                         $('.entity_send-a-message button').click(function () {
1269                             NDMF.hide();
1270                             return false;
1271                         });
1272                         NDM.removeClass(SN.C.S.Processing);
1273                     });
1274                 } else {
1275                     NDMF.show();
1276                     $('.entity_send-a-message textarea').focus();
1277                 }
1278                 return false;
1279             });
1280         },
1281
1282         /**
1283          * Return a date object with the current local time on the
1284          * given year, month, and day.
1285          *
1286          * @param {number} year: 4-digit year
1287          * @param {number} month: 0 == January
1288          * @param {number} day: 1 == 1
1289          * @return {Date}
1290          */
1291         GetFullYear: function (year, month, day) {
1292             var date = new Date();
1293             date.setFullYear(year, month, day);
1294
1295             return date;
1296         },
1297
1298         /**
1299          * Some sort of object interface for storing some structured
1300          * information in a cookie.
1301          *
1302          * Appears to be used to save the last-used login nickname?
1303          * That's something that browsers usually take care of for us
1304          * these days, do we really need to do it? Does anything else
1305          * use this interface?
1306          *
1307          * @fixme what is this?
1308          * @fixme should this use non-cookie local storage when available?
1309          */
1310         StatusNetInstance: {
1311             /**
1312              * @fixme what is this?
1313              */
1314             Set: function (value) {
1315                 var SNI = SN.U.StatusNetInstance.Get();
1316                 if (SNI !== null) {
1317                     value = $.extend(SNI, value);
1318                 }
1319
1320                 $.cookie(
1321                     SN.C.S.StatusNetInstance,
1322                     JSON.stringify(value),
1323                     {
1324                         path: '/',
1325                         expires: SN.U.GetFullYear(2029, 0, 1)
1326                     });
1327             },
1328
1329             /**
1330              * @fixme what is this?
1331              */
1332             Get: function () {
1333                 var cookieValue = $.cookie(SN.C.S.StatusNetInstance);
1334                 if (cookieValue !== undefined) {
1335                     return JSON.parse(cookieValue);
1336                 }
1337                 return null;
1338             },
1339
1340             /**
1341              * @fixme what is this?
1342              */
1343             Delete: function () {
1344                 $.cookie(SN.C.S.StatusNetInstance, null);
1345             }
1346         },
1347
1348         /**
1349          * Check if the current page is a timeline where the current user's
1350          * posts should be displayed immediately on success.
1351          *
1352          * @fixme this should be done in a saner way, with machine-readable
1353          * info about what page we're looking at.
1354          *
1355          * @param {DOMElement} notice: HTML chunk with formatted notice
1356          * @return boolean
1357          */
1358         belongsOnTimeline: function (notice) {
1359             var action = $("body").attr('id');
1360             if (action == 'public') {
1361                 return true;
1362             }
1363
1364             var profileLink = $('#nav_profile a').attr('href');
1365             if (profileLink) {
1366                 var authorUrl = $(notice).find('.vcard.author a.url').attr('href');
1367                 if (authorUrl == profileLink) {
1368                     if (action == 'all' || action == 'showstream') {
1369                         // Posts always show on your own friends and profile streams.
1370                         return true;
1371                     }
1372                 }
1373             }
1374
1375             // @fixme tag, group, reply timelines should be feasible as well.
1376             // Mismatch between id-based and name-based user/group links currently complicates
1377             // the lookup, since all our inline mentions contain the absolute links but the
1378             // UI links currently on the page use malleable names.
1379
1380             return false;
1381         },
1382
1383         /**
1384          * Switch to another active input sub-form.
1385          * This will hide the current form (if any), show the new one, and
1386          * update the input type tab selection state.
1387          *
1388          * @param {String} tag
1389          */
1390     switchInputFormTab: function (tag) {
1391         // The one that's current isn't current anymore
1392         $('.input_form_nav_tab.current').removeClass('current');
1393             if (tag == 'placeholder') {
1394                 // Hack: when showing the placeholder, mark the tab
1395                 // as current for 'Status'.
1396                 $('#input_form_nav_status').addClass('current');
1397             } else {
1398                 $('#input_form_nav_' + tag).addClass('current');
1399             }
1400
1401             // Don't remove 'current' if we also have the "nonav" class.
1402             // An example would be the message input form. removing
1403             // 'current' will cause the form to vanish from the page.
1404             var nonav = $('.input_form.current.nonav');
1405             if (nonav.length > 0) {
1406                 return;
1407             }
1408
1409         $('.input_form.current').removeClass('current');
1410         $('#input_form_' + tag)
1411                 .addClass('current')
1412                 .find('.ajax-notice').each(function () {
1413                     var form = $(this);
1414                     SN.Init.NoticeFormSetup(form);
1415                 })
1416                 .find('.notice_data-text').focus();
1417
1418         return false;
1419     },
1420
1421         showMoreMenuItems: function (menuid) {
1422             $('#' + menuid + ' .more_link').remove();
1423             var selector = '#' + menuid + ' .extended_menu';
1424             var extended = $(selector);
1425             extended.removeClass('extended_menu');
1426             return void(0);
1427         }
1428     },
1429
1430     Init: {
1431         /**
1432          * If user is logged in, run setup code for the new notice form:
1433          *
1434          *  - char counter
1435          *  - AJAX submission
1436          *  - location events
1437          *  - file upload events
1438          */
1439         NoticeForm: function () {
1440             if ($('body.user_in').length > 0) {
1441                 // SN.Init.NoticeFormSetup() will get run
1442                 // when forms get displayed for the first time...
1443
1444                 // Hack to initialize the placeholder at top
1445                 $('#input_form_placeholder input.placeholder').focus(function () {
1446                     SN.U.switchInputFormTab("status");
1447                 });
1448
1449                 // Make inline reply forms self-close when clicking out.
1450                 $('body').on('click', function (e) {
1451                     var currentForm = $('#content .input_forms div.current');
1452                     if (currentForm.length > 0) {
1453                         if ($('#content .input_forms').has(e.target).length == 0) {
1454                             // If all fields are empty, switch back to the placeholder.
1455                             var fields = currentForm.find('textarea, input[type=text], input[type=""]');
1456                             var anything = false;
1457                             fields.each(function () {
1458                                 anything = anything || $(this).val();
1459                             });
1460                             if (!anything) {
1461                                 SN.U.switchInputFormTab("placeholder");
1462                             }
1463                         }
1464                     }
1465
1466                     var openReplies = $('li.notice-reply');
1467                     if (openReplies.length > 0) {
1468                         var target = $(e.target);
1469                         openReplies.each(function () {
1470                             // Did we click outside this one?
1471                             var replyItem = $(this);
1472                             if (replyItem.has(e.target).length == 0) {
1473                                 var textarea = replyItem.find('.notice_data-text:first');
1474                                 var cur = $.trim(textarea.val());
1475                                 // Only close if there's been no edit.
1476                                 if (cur == '' || cur == textarea.data('initialText')) {
1477                                     var parentNotice = replyItem.closest('li.notice');
1478                                     replyItem.remove();
1479                                     parentNotice.find('li.notice-reply-placeholder').show();
1480                                 }
1481                             }
1482                         });
1483                     }
1484                 });
1485
1486                 // Infield labels for notice form inputs.
1487                 $('.input_forms fieldset fieldset label').inFieldLabels({ fadeOpacity:0 });
1488
1489             }
1490         },
1491
1492         /**
1493          * Encapsulate notice form setup for a single form.
1494          * Plugins can add extra setup by monkeypatching this
1495          * function.
1496          *
1497          * @param {jQuery} form
1498          */
1499         NoticeFormSetup: function (form) {
1500             if (!form.data('NoticeFormSetup')) {
1501                 SN.U.NoticeLocationAttach(form);
1502                 SN.U.FormNoticeXHR(form);
1503                 SN.U.FormNoticeEnhancements(form);
1504                 SN.U.NoticeDataAttach(form);
1505                 form.data('NoticeFormSetup', true);
1506             }
1507         },
1508
1509         /**
1510          * Run setup code for notice timeline views items:
1511          *
1512          * - AJAX submission for fave/repeat/reply (if logged in)
1513          * - Attachment link extras ('more' links)
1514          */
1515         Notices: function () {
1516             if ($('body.user_in').length > 0) {
1517                 var masterForm = $('.form_notice:first');
1518                 if (masterForm.length > 0) {
1519                     SN.C.I.NoticeFormMaster = document._importNode(masterForm[0], true);
1520                 }
1521                 SN.U.NoticeRepeat();
1522                 SN.U.NoticeReply();
1523                 SN.U.NoticeInlineReplySetup();
1524             }
1525
1526             SN.U.NoticeAttachments();
1527         },
1528
1529         /**
1530          * Run setup code for user & group profile page header area if logged in:
1531          *
1532          * - AJAX submission for sub/unsub/join/leave/nudge
1533          * - AJAX form popup for direct-message
1534          */
1535         EntityActions: function () {
1536             if ($('body.user_in').length > 0) {
1537                 $(document).on('click', '.form_user_subscribe', function () { SN.U.FormXHR($(this)); return false; });
1538                 $(document).on('click', '.form_user_unsubscribe', function () { SN.U.FormXHR($(this)); return false; });
1539                 $(document).on('click', '.form_group_join', function () { SN.U.FormXHR($(this)); return false; });
1540                 $(document).on('click', '.form_group_leave', function () { SN.U.FormXHR($(this)); return false; });
1541                 $(document).on('click', '.form_user_nudge', function () { SN.U.FormXHR($(this)); return false; });
1542                 $(document).on('click', '.form_peopletag_subscribe', function () { SN.U.FormXHR($(this)); return false; });
1543                 $(document).on('click', '.form_peopletag_unsubscribe', function () { SN.U.FormXHR($(this)); return false; });
1544                 $(document).on('click', '.form_user_add_peopletag', function () { SN.U.FormXHR($(this)); return false; });
1545                 $(document).on('click', '.form_user_remove_peopletag', function () { SN.U.FormXHR($(this)); return false; });
1546
1547                 SN.U.NewDirectMessage();
1548             }
1549         },
1550
1551         ProfileSearch: function () {
1552             if ($('body.user_in').length > 0) {
1553                 $(document).on('click', '.form_peopletag_edit_user_search input.submit', function () {
1554                     SN.U.FormProfileSearchXHR($(this).parents('form')); return false;
1555                 });
1556             }
1557         },
1558
1559         /**
1560          * Run setup code for login form:
1561          *
1562          * - loads saved last-used-nickname from cookie
1563          * - sets event handler to save nickname to cookie on submit
1564          *
1565          * @fixme is this necessary? Browsers do their own form saving these days.
1566          */
1567         Login: function () {
1568             if (SN.U.StatusNetInstance.Get() !== null) {
1569                 var nickname = SN.U.StatusNetInstance.Get().Nickname;
1570                 if (nickname !== null) {
1571                     $('#form_login #nickname').val(nickname);
1572                 }
1573             }
1574
1575             $('#form_login').on('submit', function () {
1576                 SN.U.StatusNetInstance.Set({Nickname: $('#form_login #nickname').val()});
1577                 return true;
1578             });
1579         },
1580
1581         /**
1582          * Called when a people tag edit box is shown in the interface
1583          *
1584          * - loads the jQuery UI autocomplete plugin
1585          * - sets event handlers for tag completion
1586          *
1587          */
1588         PeopletagAutocomplete: function (txtBox) {
1589             var split = function (val) {
1590                 return val.split( /\s+/ );
1591             }
1592             var extractLast = function (term) {
1593                 return split(term).pop();
1594             }
1595
1596             // don't navigate away from the field on tab when selecting an item
1597             txtBox.on( "keydown", function ( event ) {
1598                 if ( event.keyCode === $.ui.keyCode.TAB &&
1599                         $(this).data( "autocomplete" ).menu.active ) {
1600                     event.preventDefault();
1601                 }
1602             }).autocomplete({
1603                 minLength: 0,
1604                 source: function (request, response) {
1605                     // delegate back to autocomplete, but extract the last term
1606                     response($.ui.autocomplete.filter(
1607                         SN.C.PtagACData, extractLast(request.term)));
1608                 },
1609                 focus: function () {
1610                     return false;
1611                 },
1612                 select: function (event, ui) {
1613                     var terms = split(this.value);
1614                     terms.pop();
1615                     terms.push(ui.item.value);
1616                     terms.push("");
1617                     this.value = terms.join(" ");
1618                     return false;
1619                 }
1620             }).data('autocomplete')._renderItem = function (ul, item) {
1621                     // FIXME: with jQuery UI you cannot have it highlight the match
1622                     var _l = '<a class="ptag-ac-line-tag">' + item.tag
1623                           + ' <em class="privacy_mode">' + item.mode + '</em>'
1624                           + '<span class="freq">' + item.freq + '</span></a>'
1625
1626                     return $("<li/>")
1627                             .addClass('mode-' + item.mode)
1628                             .addClass('ptag-ac-line')
1629                             .data("item.autocomplete", item)
1630                             .append(_l)
1631                             .appendTo(ul);
1632                 }
1633         },
1634
1635         /**
1636          * Run setup for the ajax people tags editor
1637          *
1638          * - show edit button
1639          * - set event handle for click on edit button
1640          *   - loads people tag autocompletion data if not already present
1641          *     or if it is stale.
1642          *
1643          */
1644         PeopleTags: function () {
1645             $('.user_profile_tags .editable').append($('<button class="peopletags_edit_button"/>'));
1646
1647             $(document).on('click', '.peopletags_edit_button', function () {
1648                 var form = $(this).parents('dd').eq(0).find('form');
1649                 // We can buy time from the above animation
1650
1651                 $.ajax({
1652                     url: _peopletagAC,
1653                     dataType: 'json',
1654                     data: {token: $('#token').val()},
1655                     ifModified: true,
1656                     success: function (data) {
1657                         // item.label is used to match
1658                         for (i=0; i < data.length; i++) {
1659                             data[i].label = data[i].tag;
1660                         }
1661
1662                         SN.C.PtagACData = data;
1663                         SN.Init.PeopletagAutocomplete(form.find('#tags'));
1664                     }
1665                 });
1666
1667                 $(this).parents('ul').eq(0).fadeOut(200, function () {form.fadeIn(200).find('input#tags')});
1668             });
1669
1670             $(document).on('click', '.user_profile_tags form .submit', function () {
1671                 SN.U.FormPeopletagsXHR($(this).parents('form')); return false;
1672             });
1673         },
1674
1675         /**
1676          * Set up any generic 'ajax' form so it submits via AJAX with auto-replacement.
1677          */
1678         AjaxForms: function () {
1679             $(document).on('submit', 'form.ajax', function () {
1680                 SN.U.FormXHR($(this));
1681                 return false;
1682             });
1683             $(document).on('click', 'form.ajax input[type=submit]', function () {
1684                 // Some forms rely on knowing which submit button was clicked.
1685                 // Save a hidden input field which'll be picked up during AJAX
1686                 // submit...
1687                 var button = $(this);
1688                 var form = button.closest('form');
1689                 form.find('.hidden-submit-button').remove();
1690                 $('<input class="hidden-submit-button" type="hidden" />')
1691                     .attr('name', button.attr('name'))
1692                     .val(button.val())
1693                     .appendTo(form);
1694             });
1695         },
1696
1697         /**
1698          * Add logic to any file upload forms to handle file size limits,
1699          * on browsers that support basic FileAPI.
1700          */
1701         UploadForms: function () {
1702             $('input[type=file]').change(function (event) {
1703                 if (typeof this.files === "object" && this.files.length > 0) {
1704                     var size = 0;
1705                     for (var i = 0; i < this.files.length; i++) {
1706                         size += this.files[i].size;
1707                     }
1708
1709                     var max = SN.U.maxFileSize($(this.form));
1710                     if (max > 0 && size > max) {
1711                         var msg = 'File too large: maximum upload size is %d bytes.';
1712                         alert(msg.replace('%d', max));
1713
1714                         // Clear the files.
1715                         $(this).val('');
1716                         event.preventDefault();
1717                         return false;
1718                     }
1719                 }
1720             });
1721         },
1722
1723         CheckBoxes: function () {
1724             $("span[class='checkbox-wrapper']").addClass("unchecked");
1725             $(".checkbox-wrapper").click(function () {
1726                 if ($(this).children("input").prop("checked")) {
1727                     // uncheck
1728                     $(this).children("input").prop("checked", false);
1729                     $(this).removeClass("checked");
1730                     $(this).addClass("unchecked");
1731                     $(this).children("label").text("Private?");
1732                 } else {
1733                     // check
1734                     $(this).children("input").prop("checked", true);
1735                     $(this).removeClass("unchecked");
1736                     $(this).addClass("checked");
1737                     $(this).children("label").text("Private");
1738                 }
1739             });
1740         }
1741     }
1742 };
1743
1744 /**
1745  * Run initialization functions on DOM-ready.
1746  *
1747  * Note that if we're waiting on other scripts to load, this won't happen
1748  * until that's done. To load scripts asynchronously without delaying setup,
1749  * don't start them loading until after DOM-ready time!
1750  */
1751 $(function () {
1752     SN.Init.AjaxForms();
1753     SN.Init.UploadForms();
1754     SN.Init.CheckBoxes();
1755     if ($('.' + SN.C.S.FormNotice).length > 0) {
1756         SN.Init.NoticeForm();
1757     }
1758     if ($('#content .notices').length > 0) {
1759         SN.Init.Notices();
1760     }
1761     if ($('#content .entity_actions').length > 0) {
1762         SN.Init.EntityActions();
1763     }
1764     if ($('#form_login').length > 0) {
1765         SN.Init.Login();
1766     }
1767     if ($('#profile_search_results').length > 0) {
1768         SN.Init.ProfileSearch();
1769     }
1770     if ($('.user_profile_tags .editable').length > 0) {
1771         SN.Init.PeopleTags();
1772     }
1773 });
1774