src/main/resources/static/javascript/sone.js

   1 /* Sone JavaScript functions. */
   2
   3 /* jQuery overrides. */
   4 oldGetJson = jQuery.prototype.getJSON;
   5 jQuery.prototype.getJSON = function(url, data, successCallback, errorCallback) {
   6         if (typeof errorCallback == "undefined") {
   7                 return oldGetJson(url, data, successCallback);
   8         }
   9         if (jQuery.isFunction(data)) {
  10                 errorCallback = successCallback;
  11                 successCallback = data;
  12                 data = null;
  13         }
  14         return jQuery.ajax({
  15                 data: data,
  16                 error: errorCallback,
  17                 success: successCallback,
  18                 url: url
  19         });
  20 }
  21
  22 function isOnline() {
  23         return $("#sone").hasClass("online");
  24 }
  25
  26 function registerInputTextareaSwap(inputElement, defaultText, inputFieldName, optional, dontUseTextarea) {
  27         $(inputElement).each(function() {
  28                 textarea = $(dontUseTextarea ? "<input type=\"text\" name=\"" + inputFieldName + "\">" : "<textarea name=\"" + inputFieldName + "\"></textarea>").blur(function() {
  29                         if ($(this).val() == "") {
  30                                 $(this).hide();
  31                                 inputField = $(this).data("inputField");
  32                                 inputField.show().removeAttr("disabled").addClass("default");
  33                                 inputField.val(defaultText);
  34                         }
  35                 }).hide().data("inputField", $(this)).val($(this).val());
  36                 $(this).after(textarea);
  37                 (function(inputField, textarea) {
  38                         inputField.focus(function() {
  39                                 $(this).hide().attr("disabled", "disabled");
  40                                 textarea.show().focus();
  41                         });
  42                         if (inputField.val() == "") {
  43                                 inputField.addClass("default");
  44                                 inputField.val(defaultText);
  45                         } else {
  46                                 inputField.hide().attr("disabled", "disabled");
  47                                 textarea.show();
  48                         }
  49                         $(inputField.get(0).form).submit(function() {
  50                                 if (!optional && (textarea.val() == "")) {
  51                                         return false;
  52                                 }
  53                         });
  54                 })($(this), textarea);
  55         });
  56 }
  57
  58 /**
  59  * Adds a “comment” link to all status lines contained in the given element.
  60  *
  61  * @param postId
  62  *            The ID of the post
  63  * @param element
  64  *            The element to add a “comment” link to
  65  */
  66 function addCommentLink(postId, element, insertAfterThisElement) {
  67         if ($(element).find(".show-reply-form").length > 0) {
  68                 return;
  69         }
  70         commentElement = (function(postId) {
  71                 var commentElement = $("<div><span>Comment</span></div>").addClass("show-reply-form").click(function() {
  72                         markPostAsKnown(getPostElement(this));
  73                         replyElement = $("#sone .post#" + postId + " .create-reply");
  74                         replyElement.removeClass("hidden");
  75                         replyElement.removeClass("light");
  76                         (function(replyElement) {
  77                                 replyElement.find("input.reply-input").blur(function() {
  78                                         if ($(this).hasClass("default")) {
  79                                                 replyElement.addClass("light");
  80                                         }
  81                                 }).focus(function() {
  82                                         replyElement.removeClass("light");
  83                                 });
  84                         })(replyElement);
  85                         replyElement.find("input.reply-input").focus();
  86                 });
  87                 return commentElement;
  88         })(postId);
  89         $(insertAfterThisElement).after(commentElement.clone(true));
  90 }
  91
  92 var translations = {};
  93
  94 /**
  95  * Retrieves the translation for the given key and calls the callback function.
  96  * The callback function takes a single parameter, the translated string.
  97  *
  98  * @param key
  99  *            The key of the translation string
 100  * @param callback
 101  *            The callback function
 102  */
 103 function getTranslation(key, callback) {
 104         if (key in translations) {
 105                 callback(translations[key]);
 106                 return;
 107         }
 108         $.getJSON("getTranslation.ajax", {"key": key}, function(data, textStatus) {
 109                 if ((data != null) && data.success) {
 110                         translations[key] = data.value;
 111                         callback(data.value);
 112                 }
 113         }, function(xmlHttpRequest, textStatus, error) {
 114                 /* ignore error. */
 115         });
 116 }
 117
 118 /**
 119  * Filters the given Sone ID, replacing all “~” characters by an underscore.
 120  *
 121  * @param soneId
 122  *            The Sone ID to filter
 123  * @returns The filtered Sone ID
 124  */
 125 function filterSoneId(soneId) {
 126         return soneId.replace(/[^a-zA-Z0-9-]/g, "_");
 127 }
 128
 129 /**
 130  * Updates the status of the given Sone.
 131  *
 132  * @param soneId
 133  *            The ID of the Sone to update
 134  * @param status
 135  *            The status of the Sone (“idle”, “unknown”, “inserting”,
 136  *            “downloading”)
 137  * @param modified
 138  *            Whether the Sone is modified
 139  * @param locked
 140  *            Whether the Sone is locked
 141  * @param lastUpdated
 142  *            The date and time of the last update (formatted for display)
 143  */
 144 function updateSoneStatus(soneId, name, status, modified, locked, lastUpdated) {
 145         $("#sone .sone." + filterSoneId(soneId)).
 146                 toggleClass("unknown", status == "unknown").
 147                 toggleClass("idle", status == "idle").
 148                 toggleClass("inserting", status == "inserting").
 149                 toggleClass("downloading", status == "downloading").
 150                 toggleClass("modified", modified);
 151         $("#sone .sone." + filterSoneId(soneId) + " .lock").toggleClass("hidden", locked);
 152         $("#sone .sone." + filterSoneId(soneId) + " .unlock").toggleClass("hidden", !locked);
 153         $("#sone .sone." + filterSoneId(soneId) + " .last-update span.time").text(lastUpdated);
 154         $("#sone .sone." + filterSoneId(soneId) + " .profile-link a").text(name);
 155 }
 156
 157 /**
 158  * Enhances a “delete” button so that the confirmation is done on the same page.
 159  *
 160  * @param button
 161  *            The button element
 162  * @param text
 163  *            The text to show on the button
 164  * @param deleteCallback
 165  *            The callback that actually deletes something
 166  */
 167 function enhanceDeleteButton(button, text, deleteCallback) {
 168         (function(button) {
 169                 newButton = $("<button></button>").addClass("confirm").hide().text(text).click(function() {
 170                         $(this).fadeOut("slow");
 171                         deleteCallback();
 172                         return false;
 173                 }).insertAfter(button);
 174                 (function(button, newButton) {
 175                         button.click(function() {
 176                                 button.fadeOut("slow", function() {
 177                                         newButton.fadeIn("slow");
 178                                         $(document).one("click", function() {
 179                                                 if (this != newButton.get(0)) {
 180                                                         newButton.fadeOut(function() {
 181                                                                 button.fadeIn();
 182                                                         });
 183                                                 }
 184                                         });
 185                                 });
 186                                 return false;
 187                         });
 188                 })(button, newButton);
 189         })($(button));
 190 }
 191
 192 /**
 193  * Enhances a post’s “delete” button.
 194  *
 195  * @param button
 196  *            The button element
 197  * @param postId
 198  *            The ID of the post to delete
 199  * @param text
 200  *            The text to replace the button with
 201  */
 202 function enhanceDeletePostButton(button, postId, text) {
 203         enhanceDeleteButton(button, text, function() {
 204                 $.getJSON("deletePost.ajax", { "post": postId, "formPassword": getFormPassword() }, function(data, textStatus) {
 205                         if (data == null) {
 206                                 return;
 207                         }
 208                         if (data.success) {
 209                                 $("#sone .post#" + postId).slideUp();
 210                         } else if (data.error == "invalid-post-id") {
 211                                 alert("Invalid post ID given!");
 212                         } else if (data.error == "auth-required") {
 213                                 alert("You need to be logged in.");
 214                         } else if (data.error == "not-authorized") {
 215                                 alert("You are not allowed to delete this post.");
 216                         }
 217                 }, function(xmlHttpRequest, textStatus, error) {
 218                         /* ignore error. */
 219                 });
 220         });
 221 }
 222
 223 /**
 224  * Enhances a reply’s “delete” button.
 225  *
 226  * @param button
 227  *            The button element
 228  * @param replyId
 229  *            The ID of the reply to delete
 230  * @param text
 231  *            The text to replace the button with
 232  */
 233 function enhanceDeleteReplyButton(button, replyId, text) {
 234         enhanceDeleteButton(button, text, function() {
 235                 $.getJSON("deleteReply.ajax", { "reply": replyId, "formPassword": $("#sone #formPassword").text() }, function(data, textStatus) {
 236                         if (data == null) {
 237                                 return;
 238                         }
 239                         if (data.success) {
 240                                 $("#sone .reply#" + replyId).slideUp();
 241                         } else if (data.error == "invalid-reply-id") {
 242                                 alert("Invalid reply ID given!");
 243                         } else if (data.error == "auth-required") {
 244                                 alert("You need to be logged in.");
 245                         } else if (data.error == "not-authorized") {
 246                                 alert("You are not allowed to delete this reply.");
 247                         }
 248                 }, function(xmlHttpRequest, textStatus, error) {
 249                         /* ignore error. */
 250                 });
 251         });
 252 }
 253
 254 function getFormPassword() {
 255         return $("#sone #formPassword").text();
 256 }
 257
 258 function getSoneElement(element) {
 259         return $(element).closest(".sone");
 260 }
 261
 262 /**
 263  * Generates a list of Sones by concatening the names of the given sones with a
 264  * new line character (“\n”).
 265  *
 266  * @param sones
 267  *            The sones to format
 268  * @returns {String} The created string
 269  */
 270 function generateSoneList(sones) {
 271         var soneList = "";
 272         $.each(sones, function() {
 273                 if (soneList != "") {
 274                         soneList += ", ";
 275                 }
 276                 soneList += this.name;
 277         });
 278         return soneList;
 279 }
 280
 281 /**
 282  * Returns the ID of the Sone that this element belongs to.
 283  *
 284  * @param element
 285  *            The element to locate the matching Sone ID for
 286  * @returns The ID of the Sone, or undefined
 287  */
 288 function getSoneId(element) {
 289         return getSoneElement(element).find(".id").text();
 290 }
 291
 292 function getPostElement(element) {
 293         return $(element).closest(".post");
 294 }
 295
 296 function getPostId(element) {
 297         return getPostElement(element).attr("id");
 298 }
 299
 300 function getPostTime(element) {
 301         return getPostElement(element).find(".post-time").text();
 302 }
 303
 304 function getReplyElement(element) {
 305         return $(element).closest(".reply");
 306 }
 307
 308 function getReplyId(element) {
 309         return getReplyElement(element).attr("id");
 310 }
 311
 312 function getReplyTime(element) {
 313         return getReplyElement(element).find(".reply-time").text();
 314 }
 315
 316 function likePost(postId) {
 317         $.getJSON("like.ajax", { "type": "post", "post" : postId, "formPassword": getFormPassword() }, function(data, textStatus) {
 318                 if ((data == null) || !data.success) {
 319                         return;
 320                 }
 321                 $("#sone .post#" + postId + " > .inner-part > .status-line .like").addClass("hidden");
 322                 $("#sone .post#" + postId + " > .inner-part > .status-line .unlike").removeClass("hidden");
 323                 updatePostLikes(postId);
 324         }, function(xmlHttpRequest, textStatus, error) {
 325                 /* ignore error. */
 326         });
 327 }
 328
 329 function unlikePost(postId) {
 330         $.getJSON("unlike.ajax", { "type": "post", "post" : postId, "formPassword": getFormPassword() }, function(data, textStatus) {
 331                 if ((data == null) || !data.success) {
 332                         return;
 333                 }
 334                 $("#sone .post#" + postId + " > .inner-part > .status-line .unlike").addClass("hidden");
 335                 $("#sone .post#" + postId + " > .inner-part > .status-line .like").removeClass("hidden");
 336                 updatePostLikes(postId);
 337         }, function(xmlHttpRequest, textStatus, error) {
 338                 /* ignore error. */
 339         });
 340 }
 341
 342 function updatePostLikes(postId) {
 343         $.getJSON("getLikes.ajax", { "type": "post", "post": postId }, function(data, textStatus) {
 344                 if ((data != null) && data.success) {
 345                         $("#sone .post#" + postId + " > .inner-part > .status-line .likes").toggleClass("hidden", data.likes == 0)
 346                         $("#sone .post#" + postId + " > .inner-part > .status-line .likes span.like-count").text(data.likes);
 347                         $("#sone .post#" + postId + " > .inner-part > .status-line .likes > span").attr("title", generateSoneList(data.sones));
 348                 }
 349         }, function(xmlHttpRequest, textStatus, error) {
 350                 /* ignore error. */
 351         });
 352 }
 353
 354 function likeReply(replyId) {
 355         $.getJSON("like.ajax", { "type": "reply", "reply" : replyId, "formPassword": getFormPassword() }, function(data, textStatus) {
 356                 if ((data == null) || !data.success) {
 357                         return;
 358                 }
 359                 $("#sone .reply#" + replyId + " .status-line .like").addClass("hidden");
 360                 $("#sone .reply#" + replyId + " .status-line .unlike").removeClass("hidden");
 361                 updateReplyLikes(replyId);
 362         }, function(xmlHttpRequest, textStatus, error) {
 363                 /* ignore error. */
 364         });
 365 }
 366
 367 function unlikeReply(replyId) {
 368         $.getJSON("unlike.ajax", { "type": "reply", "reply" : replyId, "formPassword": getFormPassword() }, function(data, textStatus) {
 369                 if ((data == null) || !data.success) {
 370                         return;
 371                 }
 372                 $("#sone .reply#" + replyId + " .status-line .unlike").addClass("hidden");
 373                 $("#sone .reply#" + replyId + " .status-line .like").removeClass("hidden");
 374                 updateReplyLikes(replyId);
 375         }, function(xmlHttpRequest, textStatus, error) {
 376                 /* ignore error. */
 377         });
 378 }
 379
 380 function updateReplyLikes(replyId) {
 381         $.getJSON("getLikes.ajax", { "type": "reply", "reply": replyId }, function(data, textStatus) {
 382                 if ((data != null) && data.success) {
 383                         $("#sone .reply#" + replyId + " .status-line .likes").toggleClass("hidden", data.likes == 0)
 384                         $("#sone .reply#" + replyId + " .status-line .likes span.like-count").text(data.likes);
 385                         $("#sone .reply#" + replyId + " .status-line .likes > span").attr("title", generateSoneList(data.sones));
 386                 }
 387         }, function(xmlHttpRequest, textStatus, error) {
 388                 /* ignore error. */
 389         });
 390 }
 391
 392 /**
 393  * Posts a reply and calls the given callback when the request finishes.
 394  *
 395  * @param postId
 396  *            The ID of the post the reply refers to
 397  * @param text
 398  *            The text to post
 399  * @param callbackFunction
 400  *            The callback function to call when the request finishes (takes 3
 401  *            parameters: success, error, replyId)
 402  */
 403 function postReply(postId, text, callbackFunction) {
 404         $.getJSON("createReply.ajax", { "formPassword" : getFormPassword(), "post" : postId, "text": text }, function(data, textStatus) {
 405                 if (data == null) {
 406                         /* TODO - show error */
 407                         return;
 408                 }
 409                 if (data.success) {
 410                         callbackFunction(true, null, data.reply);
 411                 } else {
 412                         callbackFunction(false, data.error);
 413                 }
 414         }, function(xmlHttpRequest, textStatus, error) {
 415                 /* ignore error. */
 416         });
 417 }
 418
 419 /**
 420  * Requests information about the reply with the given ID.
 421  *
 422  * @param replyId
 423  *            The ID of the reply
 424  * @param callbackFunction
 425  *            A callback function (parameters soneId, soneName, replyTime,
 426  *            replyDisplayTime, text, html)
 427  */
 428 function getReply(replyId, callbackFunction) {
 429         $.getJSON("getReply.ajax", { "reply" : replyId }, function(data, textStatus) {
 430                 if ((data != null) && data.success) {
 431                         callbackFunction(data.soneId, data.soneName, data.time, data.displayTime, data.text, data.html);
 432                 }
 433         }, function(xmlHttpRequest, textStatus, error) {
 434                 /* ignore error. */
 435         });
 436 }
 437
 438 /**
 439  * Ajaxifies the given post by enhancing all eligible elements with AJAX.
 440  *
 441  * @param postElement
 442  *            The post element to ajaxify
 443  */
 444 function ajaxifyPost(postElement) {
 445         $(postElement).find("form").submit(function() {
 446                 return false;
 447         });
 448         $(postElement).find(".create-reply button:submit").click(function() {
 449                 inputField = $(this.form).find(":input:enabled").get(0);
 450                 postId = getPostId(this);
 451                 text = $(inputField).val();
 452                 (function(postId, text, inputField) {
 453                         postReply(postId, text, function(success, error, replyId) {
 454                                 if (success) {
 455                                         $(inputField).val("");
 456                                         loadNewReply(replyId);
 457                                         markPostAsKnown(getPostElement(inputField));
 458                                         $("#sone .post#" + postId + " .create-reply").addClass("hidden");
 459                                 } else {
 460                                         alert(error);
 461                                 }
 462                         });
 463                 })(postId, text, inputField);
 464                 return false;
 465         });
 466
 467         /* replace all “delete” buttons with javascript. */
 468         (function(postElement) {
 469                 getTranslation("WebInterface.Confirmation.DeletePostButton", function(deletePostText) {
 470                         postId = getPostId(postElement);
 471                         enhanceDeletePostButton($(postElement).find(".delete-post button"), postId, deletePostText);
 472                 });
 473         })(postElement);
 474
 475         /* convert all “like” buttons to javascript functions. */
 476         $(postElement).find(".like-post").submit(function() {
 477                 likePost(getPostId(this));
 478                 markPostAsKnown(getPostElement(this));
 479                 return false;
 480         });
 481         $(postElement).find(".unlike-post").submit(function() {
 482                 unlikePost(getPostId(this));
 483                 markPostAsKnown(getPostElement(this));
 484                 return false;
 485         });
 486
 487         /* add “comment” link. */
 488         addCommentLink(getPostId(postElement), postElement, $(postElement).find(".post-status-line .time"));
 489
 490         /* process all replies. */
 491         $(postElement).find(".reply").each(function() {
 492                 ajaxifyReply(this);
 493         });
 494
 495         /* process reply input fields. */
 496         getTranslation("WebInterface.DefaultText.Reply", function(text) {
 497                 $(postElement).find("input.reply-input").each(function() {
 498                         registerInputTextareaSwap(this, text, "text", false, false);
 499                 });
 500         });
 501
 502         /* mark everything as known on click. */
 503         $(postElement).click(function() {
 504                 markPostAsKnown(this);
 505         });
 506
 507         /* hide reply input field. */
 508         $(postElement).find(".create-reply").addClass("hidden");
 509 }
 510
 511 /**
 512  * Ajaxifies the given reply element.
 513  *
 514  * @param replyElement
 515  *            The reply element to ajaxify
 516  */
 517 function ajaxifyReply(replyElement) {
 518         $(replyElement).find(".like-reply").submit(function() {
 519                 likeReply(getReplyId(this));
 520                 markPostAsKnown(getPostElement(this));
 521                 return false;
 522         });
 523         $(replyElement).find(".unlike-reply").submit(function() {
 524                 unlikeReply(getReplyId(this));
 525                 markPostAsKnown(getPostElement(this));
 526                 return false;
 527         });
 528         (function(replyElement) {
 529                 getTranslation("WebInterface.Confirmation.DeleteReplyButton", function(deleteReplyText) {
 530                         $(replyElement).find(".delete-reply button").each(function() {
 531                                 enhanceDeleteReplyButton(this, getReplyId(replyElement), deleteReplyText);
 532                         });
 533                 });
 534         })(replyElement);
 535         addCommentLink(getPostId(replyElement), replyElement, $(replyElement).find(".reply-status-line .time"));
 536
 537         /* mark post and all replies as known on click. */
 538         $(replyElement).click(function() {
 539                 markPostAsKnown(getPostElement(this));
 540         });
 541 }
 542
 543 /**
 544  * Ajaxifies the given notification by replacing the form with AJAX.
 545  *
 546  * @param notification
 547  *            jQuery object representing the notification.
 548  */
 549 function ajaxifyNotification(notification) {
 550         notification.find("form.dismiss").submit(function() {
 551                 return false;
 552         });
 553         notification.find("form.dismiss button").click(function() {
 554                 $.getJSON("dismissNotification.ajax", { "formPassword" : getFormPassword(), "notification" : notification.attr("id") }, function(data, textStatus) {
 555                         /* dismiss in case of error, too. */
 556                         notification.slideUp();
 557                 }, function(xmlHttpRequest, textStatus, error) {
 558                         /* ignore error. */
 559                 });
 560         });
 561         return notification;
 562 }
 563
 564 function getStatus() {
 565         $.getJSON("getStatus.ajax", {"loadAllSones": isKnownSonesPage()}, function(data, textStatus) {
 566                 if ((data != null) && data.success) {
 567                         /* process Sone information. */
 568                         $.each(data.sones, function(index, value) {
 569                                 updateSoneStatus(value.id, value.name, value.status, value.modified, value.locked, value.lastUpdated);
 570                         });
 571                         /* process notifications. */
 572                         $.each(data.notifications, function(index, value) {
 573                                 oldNotification = $("#sone #notification-area .notification#" + value.id);
 574                                 notification = ajaxifyNotification(createNotification(value.id, value.text, value.dismissable)).hide();
 575                                 if (oldNotification.length != 0) {
 576                                         oldNotification.replaceWith(notification.show());
 577                                 } else {
 578                                         $("#sone #notification-area").append(notification);
 579                                         notification.slideDown();
 580                                 }
 581                                 setActivity();
 582                         });
 583                         $.each(data.removedNotifications, function(index, value) {
 584                                 $("#sone #notification-area .notification#" + value.id).slideUp();
 585                         });
 586                         /* process new posts. */
 587                         $.each(data.newPosts, function(index, value) {
 588                                 loadNewPost(value);
 589                         });
 590                         /* process new replies. */
 591                         $.each(data.newReplies, function(index, value) {
 592                                 loadNewReply(value);
 593                         });
 594                         /* do it again in 5 seconds. */
 595                         setTimeout(getStatus, 5000);
 596                 } else {
 597                         /* data.success was false, wait 30 seconds. */
 598                         setTimeout(getStatus, 30000);
 599                 }
 600         }, function(xmlHttpRequest, textStatus, error) {
 601                 /* something really bad happend, wait a minute. */
 602                 setTimeout(getStatus, 60000);
 603         })
 604 }
 605
 606 /**
 607  * Returns the content of the page-id attribute.
 608  *
 609  * @returns The page ID
 610  */
 611 function getPageId() {
 612         return $("#sone .page-id").text();
 613 }
 614
 615 /**
 616  * Returns whether the current page is the index page.
 617  *
 618  * @returns {Boolean} <code>true</code> if the current page is the index page,
 619  *          <code>false</code> otherwise
 620  */
 621 function isIndexPage() {
 622         return getPageId() == "index";
 623 }
 624
 625 /**
 626  * Returns whether the current page is a “view Sone” page.
 627  *
 628  * @returns {Boolean} <code>true</code> if the current page is a “view Sone”
 629  *          page, <code>false</code> otherwise
 630  */
 631 function isViewSonePage() {
 632         return getPageId() == "view-sone";
 633 }
 634
 635 /**
 636  * Returns the ID of the currently shown Sone. This will only return a sensible
 637  * value if isViewSonePage() returns <code>true</code>.
 638  *
 639  * @returns The ID of the currently shown Sone
 640  */
 641 function getShownSoneId() {
 642         return $("#sone .sone-id").text();
 643 }
 644
 645 /**
 646  * Returns whether the current page is a “view post” page.
 647  *
 648  * @returns {Boolean} <code>true</code> if the current page is a “view post”
 649  *          page, <code>false</code> otherwise
 650  */
 651 function isViewPostPage() {
 652         return getPageId() == "view-post";
 653 }
 654
 655 /**
 656  * Returns the ID of the currently shown post. This will only return a sensible
 657  * value if isViewPostPage() returns <code>true</code>.
 658  *
 659  * @returns The ID of the currently shown post
 660  */
 661 function getShownPostId() {
 662         return $("#sone .post-id").text();
 663 }
 664
 665 /**
 666  * Returns whether the current page is the “known Sones” page.
 667  *
 668  * @returns {Boolean} <code>true</code> if the current page is the “known
 669  *          Sones” page, <code>false</code> otherwise
 670  */
 671 function isKnownSonesPage() {
 672         return getPageId() == "known-sones";
 673 }
 674
 675 /**
 676  * Returns whether a post with the given ID exists on the current page.
 677  *
 678  * @param postId
 679  *            The post ID to check for
 680  * @returns {Boolean} <code>true</code> if a post with the given ID already
 681  *          exists on the page, <code>false</code> otherwise
 682  */
 683 function hasPost(postId) {
 684         return $(".post#" + postId).length > 0;
 685 }
 686
 687 /**
 688  * Returns whether a reply with the given ID exists on the current page.
 689  *
 690  * @param replyId
 691  *            The reply ID to check for
 692  * @returns {Boolean} <code>true</code> if a reply with the given ID already
 693  *          exists on the page, <code>false</code> otherwise
 694  */
 695 function hasReply(replyId) {
 696         return $("#sone .reply#" + replyId).length > 0;
 697 }
 698
 699 function loadNewPost(postId) {
 700         if (hasPost(postId)) {
 701                 return;
 702         }
 703         $.getJSON("getPost.ajax", { "post" : postId }, function(data, textStatus) {
 704                 if ((data != null) && data.success) {
 705                         if (hasPost(data.post.id)) {
 706                                 return;
 707                         }
 708                         if (!isIndexPage() && !(isViewSonePage() && ((getShownSoneId() == data.post.sone) || (getShownSoneId() == data.post.recipient)))) {
 709                                 return;
 710                         }
 711                         var firstOlderPost = null;
 712                         $("#sone .post").each(function() {
 713                                 if (getPostTime(this) < data.post.time) {
 714                                         firstOlderPost = $(this);
 715                                         return false;
 716                                 }
 717                         });
 718                         newPost = $(data.post.html).addClass("hidden");
 719                         if (firstOlderPost != null) {
 720                                 newPost.insertBefore(firstOlderPost);
 721                         } else {
 722                                 $("#sone #posts").append(newPost);
 723                         }
 724                         ajaxifyPost(newPost);
 725                         newPost.slideDown();
 726                         setActivity();
 727                 }
 728         });
 729 }
 730
 731 function loadNewReply(replyId) {
 732         if (hasReply(replyId)) {
 733                 return;
 734         }
 735         $.getJSON("getReply.ajax", { "reply": replyId }, function(data, textStatus) {
 736                 /* find post. */
 737                 if ((data != null) && data.success) {
 738                         if (hasReply(data.reply.id)) {
 739                                 return;
 740                         }
 741                         $("#sone .post#" + data.reply.postId).each(function() {
 742                                 var firstNewerReply = null;
 743                                 $(this).find(".replies .reply").each(function() {
 744                                         if (getReplyTime(this) > data.reply.time) {
 745                                                 firstNewerReply = $(this);
 746                                                 return false;
 747                                         }
 748                                 });
 749                                 newReply = $(data.reply.html).addClass("hidden");
 750                                 if (firstNewerReply != null) {
 751                                         newReply.insertBefore(firstNewerReply);
 752                                 } else {
 753                                         if ($(this).find(".replies .create-reply")) {
 754                                                 $(this).find(".replies .create-reply").before(newReply);
 755                                         } else {
 756                                                 $(this).find(".replies").append(newReply);
 757                                         }
 758                                 }
 759                                 ajaxifyReply(newReply);
 760                                 newReply.slideDown();
 761                                 setActivity();
 762                                 return false;
 763                         });
 764                 }
 765         });
 766 }
 767
 768 function markPostAsKnown(postElements) {
 769         $(postElements).each(function() {
 770                 postElement = this;
 771                 if ($(postElement).hasClass("new")) {
 772                         (function(postElement) {
 773                                 $.getJSON("markPostAsKnown.ajax", {"formPassword": getFormPassword(), "post": getPostId(postElement)}, function(data, textStatus) {
 774                                         $(postElement).removeClass("new");
 775                                 });
 776                         })(postElement);
 777                 }
 778         });
 779         markReplyAsKnown($(postElements).find(".reply"));
 780 }
 781
 782 function markReplyAsKnown(replyElements) {
 783         $(replyElements).each(function() {
 784                 replyElement = this;
 785                 if ($(replyElement).hasClass("new")) {
 786                         (function(replyElement) {
 787                                 $.getJSON("markReplyAsKnown.ajax", {"formPassword": getFormPassword(), "reply": getReplyId(replyElement)}, function(data, textStatus) {
 788                                         $(replyElement).removeClass("new");
 789                                 });
 790                         })(replyElement);
 791                 }
 792         });
 793 }
 794
 795 function resetActivity() {
 796         title = document.title;
 797         if (title.indexOf('(') == 0) {
 798                 document.title = title.substr(title.indexOf(' ') + 1);
 799         }
 800 }
 801
 802 function setActivity() {
 803         if (!focus) {
 804                 title = document.title;
 805                 if (title.indexOf('(') != 0) {
 806                         document.title = "(!) " + title;
 807                 }
 808         }
 809 }
 810
 811 /**
 812  * Creates a new notification.
 813  *
 814  * @param id
 815  *            The ID of the notificaiton
 816  * @param text
 817  *            The text of the notification
 818  * @param dismissable
 819  *            <code>true</code> if the notification can be dismissed by the
 820  *            user
 821  */
 822 function createNotification(id, text, dismissable) {
 823         notification = $("<div></div>").addClass("notification").attr("id", id);
 824         if (dismissable) {
 825                 dismissForm = $("#sone #notification-area #notification-dismiss-template").clone().removeClass("hidden").removeAttr("id")
 826                 dismissForm.find("input[name=notification]").val(id);
 827                 notification.append(dismissForm);
 828         }
 829         notification.append(text);
 830         return notification;
 831 }
 832
 833 //
 834 // EVERYTHING BELOW HERE IS EXECUTED AFTER LOADING THE PAGE
 835 //
 836
 837 var focus = true;
 838
 839 $(document).ready(function() {
 840
 841         /* this initializes the status update input field. */
 842         getTranslation("WebInterface.DefaultText.StatusUpdate", function(defaultText) {
 843                 registerInputTextareaSwap("#sone #update-status .status-input", defaultText, "text", false, false);
 844                 $("#sone #update-status").submit(function() {
 845                         if (!$(this).find(":input.default").hasAttr("disabled")) {
 846                                 return false;
 847                         }
 848                         text = $(this).find(":input:enabled").val();
 849                         $.getJSON("createPost.ajax", { "formPassword": getFormPassword(), "text": text }, function(data, textStatus) {
 850                                 if ((data != null) && data.success) {
 851                                         loadNewPost(data.postId);
 852                                 }
 853                         });
 854                         $(this).find(":input:enabled").val("").blur();
 855                         return false;
 856                 });
 857         });
 858
 859         /* ajaxify input field on “view Sone” page. */
 860         getTranslation("WebInterface.DefaultText.Message", function(defaultText) {
 861                 registerInputTextareaSwap("#sone #post-message input[name=text]", defaultText, "text", false, false);
 862                 $("#sone #post-message").submit(function() {
 863                         text = $(this).find(":input:enabled").val();
 864                         $.getJSON("createPost.ajax", { "formPassword": getFormPassword(), "recipient": getShownSoneId(), "text": text }, function(data, textStatus) {
 865                                 if ((data != null) && data.success) {
 866                                         loadNewPost(data.postId);
 867                                 }
 868                         });
 869                         $(this).find(":input:enabled").val("").blur();
 870                         return false;
 871                 });
 872         });
 873
 874         /* Ajaxifies all posts. */
 875         /* calling getTranslation here will cache the necessary values. */
 876         getTranslation("WebInterface.Confirmation.DeletePostButton", function(text) {
 877                 getTranslation("WebInterface.Confirmation.DeleteReplyButton", function(text) {
 878                         getTranslation("WebInterface.DefaultText.Reply", function(text) {
 879                                 $("#sone .post").each(function() {
 880                                         ajaxifyPost(this);
 881                                 });
 882                         });
 883                 });
 884         });
 885
 886         /* hides all replies but the latest two. */
 887         if (!isViewPostPage()) {
 888                 getTranslation("WebInterface.ClickToShow.Replies", function(text) {
 889                         $("#sone .post .replies").each(function() {
 890                                 allReplies = $(this).find(".reply");
 891                                 if (allReplies.length > 2) {
 892                                         newHidden = false;
 893                                         for (replyIndex = 0; replyIndex < (allReplies.length - 2); ++replyIndex) {
 894                                                 $(allReplies[replyIndex]).addClass("hidden");
 895                                                 newHidden |= $(allReplies[replyIndex]).hasClass("new");
 896                                         }
 897                                         clickToShowElement = $("<div></div>").addClass("click-to-show");
 898                                         if (newHidden) {
 899                                                 clickToShowElement.addClass("new");
 900                                         }
 901                                         (function(clickToShowElement, allReplies, text) {
 902                                                 clickToShowElement.text(text);
 903                                                 clickToShowElement.click(function() {
 904                                                         allReplies.removeClass("hidden");
 905                                                         clickToShowElement.addClass("hidden");
 906                                                 });
 907                                         })(clickToShowElement, allReplies, text);
 908                                         $(allReplies[0]).before(clickToShowElement);
 909                                 }
 910                         });
 911                 });
 912         }
 913
 914         /*
 915          * convert all “follow”, “unfollow”, “lock”, and “unlock” links to something
 916          * nicer.
 917          */
 918         $("#sone .follow").submit(function() {
 919                 var followElement = this;
 920                 $.getJSON("followSone.ajax", { "sone": getSoneId(this), "formPassword": getFormPassword() }, function() {
 921                         $(followElement).addClass("hidden");
 922                         $(followElement).parent().find(".unfollow").removeClass("hidden");
 923                 });
 924                 return false;
 925         });
 926         $("#sone .unfollow").submit(function() {
 927                 var unfollowElement = this;
 928                 $.getJSON("unfollowSone.ajax", { "sone": getSoneId(this), "formPassword": getFormPassword() }, function() {
 929                         $(unfollowElement).addClass("hidden");
 930                         $(unfollowElement).parent().find(".follow").removeClass("hidden");
 931                 });
 932                 return false;
 933         });
 934         $("#sone .lock").submit(function() {
 935                 var lockElement = this;
 936                 $.getJSON("lockSone.ajax", { "sone" : getSoneId(this), "formPassword" : getFormPassword() }, function() {
 937                         $(lockElement).addClass("hidden");
 938                         $(lockElement).parent().find(".unlock").removeClass("hidden");
 939                 });
 940                 return false;
 941         });
 942         $("#sone .unlock").submit(function() {
 943                 var unlockElement = this;
 944                 $.getJSON("unlockSone.ajax", { "sone" : getSoneId(this), "formPassword" : getFormPassword() }, function() {
 945                         $(unlockElement).addClass("hidden");
 946                         $(unlockElement).parent().find(".lock").removeClass("hidden");
 947                 });
 948                 return false;
 949         });
 950
 951         /* process all existing notifications, ajaxify dismiss buttons. */
 952         $("#sone #notification-area .notification").each(function() {
 953                 ajaxifyNotification($(this));
 954         });
 955
 956         /* activate status polling. */
 957         setTimeout(getStatus, 5000);
 958
 959         /* reset activity counter when the page has focus. */
 960         $(window).focus(function() {
 961                 focus = true;
 962                 resetActivity();
 963         }).blur(function() {
 964                 focus = false;
 965         })
 966
 967 });