(function($TD, $TDX, $, TD){
  //
  // Variable: Array of functions called after the website app is loaded.
  //
  let onAppReady = [];
  
  //
  // Variable: DOM HTML element.
  //
  const doc = document.documentElement;
  
  //
  // Variable: DOM object containing the main app element.
  //
  const app = typeof $ === "function" && $(document.body).children(".js-app");
  
  //
  // Constant: Column icon classes mapped to their titles.
  //
  const columnTitles = {
    "icon-home": "Home",
    "icon-mention": "Mentions",
    "icon-message": "Messages",
    "icon-notifications": "Notifications",
    "icon-follow": "Followers",
    "icon-activity": "Activity",
    "icon-favorite": "Likes",
    "icon-user": "User",
    "icon-search": "Search",
    "icon-list": "List",
    "icon-custom-timeline": "Timeline",
    "icon-dataminr": "Dataminr",
    "icon-play-video": "Live video",
    "icon-schedule": "Scheduled"
  };
  
  //
  // Function: Prepends code at the beginning of a function. If the prepended function returns true, execution of the original function is cancelled.
  //
  const prependToFunction = function(func, extension){
    return function(){
      return extension.apply(this, arguments) === true ? undefined : func.apply(this, arguments);
    };
  };
  
  //
  // Function: Appends code at the end of a function.
  //
  const appendToFunction = function(func, extension){
    return function(){
      let res = func.apply(this, arguments);
      extension.apply(this, arguments);
      return res;
    };
  };
  
  //
  // Function: Returns true if an object has a specified property, otherwise returns false with a debug-only error message.
  //
  const ensurePropertyExists = function(obj, ...chain){
    for(let index = 0; index < chain.length; index++){
      if (!obj.hasOwnProperty(chain[index])){
        debugger;
        $TD.crashDebug("Missing property "+chain[index]+" in chain [obj]."+chain.join("."));
        return false;
      }
      
      obj = obj[chain[index]];
    }
    
    return true;
  };
  
  //
  // Function: Returns a jQuery object but also shows a debug-only error message if no elements are found.
  //
  const $$ = function(selector, context){
    let result = $(selector, context);
    
    if (!result.length){
      debugger;
      $TD.crashDebug("No elements were found for selector "+selector);
    }
    
    return result;
  };
  
  //
  // Function: Executes a function inside a try-catch to stop it from crashing everything.
  //
  const execSafe = function(func, fail){
    try{
      func();
    }catch(err){
      console.error(err);
      
      debugger;
      $TD.crashDebug("Caught error in function "+func.name)
      
      fail && fail();
    }
  };
  
  //
  // Function: Returns an object containing data about the column below the cursor.
  //
  const getHoveredColumn = function(){
    let hovered = document.querySelectorAll(":hover");
    
    for(let index = hovered.length-1; index >= 0; index--){
      let ele = hovered[index];
      
      if (ele.tagName === "SECTION" && ele.classList.contains("js-column")){
        let obj = TD.controller.columnManager.get(ele.getAttribute("data-column"));
        
        if (obj){
          return { ele, obj };
        }
      }
    }
    
    return null;
  };
  
  //
  // Function: Returns an object containing data about the tweet below the cursor.
  //
  const getHoveredTweet = function(){
    let hovered = document.querySelectorAll(":hover");
    
    for(let index = hovered.length-1; index >= 0; index--){
      let ele = hovered[index];
      
      if (ele.tagName === "ARTICLE" && ele.classList.contains("js-stream-item") && ele.hasAttribute("data-account-key")){
        let column = getHoveredColumn();
        
        if (column){
          let wrap = column.obj.findChirp(ele.getAttribute("data-key"));
          let obj = column.obj.findChirp(ele.getAttribute("data-tweet-id")) || wrap;
          
          if (obj){
            return { ele, obj, wrap, column };
          }
        }
      }
    }
    
    return null;
  };
  
  //
  // Function: Retrieves a property of an element with a specified class.
  //
  const getClassStyleProperty = function(cls, property){
    let column = document.createElement("div");
    column.classList.add(cls);
    column.style.display = "none";
    
    document.body.appendChild(column);
    let value = window.getComputedStyle(column).getPropertyValue(property);
    document.body.removeChild(column);
    
    return value;
  };
  
  //
  // Block: Fix columns missing any identifiable attributes to allow individual styles.
  //
  execSafe(function setupColumnAttrIdentifiers(){
    $(document).on("uiColumnRendered", function(e, data){
      let icon = data.$column.find(".column-type-icon").first();
      return if icon.length !== 1;
      
      let name = Array.prototype.find.call(icon[0].classList, cls => cls.startsWith("icon-"));
      return if !name;
      
      data.$column.attr("data-td-icon", name);
      data.column._tduck_icon = name;
    });
  });
  
  //
  // Block: Setup global function to retrieve the column name.
  //
  window.TDGF_getColumnName = function(column){
    return columnTitles[column._tduck_icon] || "";
  };
  
  //
  // Function: Event callback for a new tweet.
  //
  const onNewTweet = (function(){
    let recentMessages = new Set();
    let recentTweets = new Set();
    let recentTweetTimer = null;
    
    const resetRecentTweets = () => {
      recentTweetTimer = null;
      recentTweets.clear();
    };
    
    const startRecentTweetTimer = () => {
      recentTweetTimer && window.clearTimeout(recentTweetTimer);
      recentTweetTimer = window.setTimeout(resetRecentTweets, 20000);
    };
    
    const checkTweetCache = (set, id) => {
      return true if set.has(id);
      
      if (set.size > 50){
        set.clear();
      }
      
      set.add(id);
      return false;
    };
    
    const isSensitive = (tweet) => {
      let main = tweet.getMainTweet && tweet.getMainTweet();
      return true if main && main.possiblySensitive; // TODO these don't show media badges when hiding sensitive media
      
      let related = tweet.getRelatedTweet && tweet.getRelatedTweet();
      return true if related && related.possiblySensitive;
      
      let quoted = tweet.quotedTweet;
      return true if quoted && quoted.possiblySensitive;
      
      return false;
    };
    
    const fixMedia = (html, media) => {
      return html.find("a[data-media-entity-id='"+media.mediaId+"'], .media-item").first().removeClass("is-zoomable").css("background-image", 'url("'+media.small()+'")');
    };
    
    return function(column, tweet){
      if (tweet instanceof TD.services.TwitterConversation || tweet instanceof TD.services.TwitterConversationMessageEvent){
        return if checkTweetCache(recentMessages, tweet.id);
      }
      else{
        return if checkTweetCache(recentTweets, tweet.id);
      }
      
      startRecentTweetTimer();
      
      if (column.model.getHasNotification()){
        let sensitive = isSensitive(tweet);
        let previews = $TDX.notificationMediaPreviews && (!sensitive || TD.settings.getDisplaySensitiveMedia());
        
        let html = $(tweet.render({
          withFooter: false,
          withTweetActions: false,
          withMediaPreview: true,
          isMediaPreviewOff: !previews,
          isMediaPreviewSmall: previews,
          isMediaPreviewLarge: false,
          isMediaPreviewCompact: false,
          isMediaPreviewInQuoted: previews,
          thumbSizeClass: "media-size-medium",
          mediaPreviewSize: "medium"
        }));
        
        html.find("footer").last().remove(); // apparently withTweetActions breaks for certain tweets, nice
        html.find(".js-quote-detail").removeClass("is-actionable margin-b--8"); // prevent quoted tweets from changing the cursor and reduce bottom margin
        
        if (previews){
          html.find(".reverse-image-search").remove();
          
          let container = html.find(".js-media");
          
          for(let media of tweet.getMedia()){
            fixMedia(container, media);
          }
          
          if (tweet.quotedTweet){
            for(let media of tweet.quotedTweet.getMedia()){
              fixMedia(container, media).addClass("media-size-medium");
            }
          }
        }
        else if (tweet instanceof TD.services.TwitterActionOnTweet){
          html.find(".js-media").remove();
        }
        
        html.find("a[data-full-url]").each(function(){ // bypass t.co on all links
          this.href = this.getAttribute("data-full-url");
        });
        
        html.find("a[href='#']").each(function(){ // remove <a> tags around links that don't lead anywhere (such as account names the tweet replied to)
          this.outerHTML = this.innerHTML;
        });
        
        html.find("p.link-complex-target").filter(function(){
          return $(this).text() === "Show this thread";
        }).first().each(function(){
          this.id = "tduck-show-thread";
          
          let moveBefore = html.find(".tweet-body > .js-media, .tweet-body > .js-media-preview-container, .quoted-tweet");
          
          if (moveBefore){
            $(this).css("margin-top", "5px").removeClass("margin-b--5").parent("span").detach().insertBefore(moveBefore);
          }
        });
        
        if (tweet.quotedTweet){
          html.find("p.txt-mute").filter(function(){
            return $(this).text() === "Show this thread";
          }).first().remove();
        }
        
        let type = tweet.getChirpType();
        
        if (type === "follow"){
          html.find(".js-user-actions-menu").parent().remove();
          html.find(".account-bio").removeClass("padding-t--5").css("padding-top", "2px");
        }
        else if ((type.startsWith("favorite") || type.startsWith("retweet")) && tweet.isAboutYou()){
          html.children().first().addClass("td-notification-padded");
        }
        else if (type.includes("list_member")){
          html.children().first().addClass("td-notification-padded td-notification-padded-alt");
          html.find(".activity-header").css("margin-top", "2px");
          html.find(".avatar").first().css("margin-bottom", "0");
        }
        
        if (sensitive){
          html.find(".media-badge").each(function(){
            $(this)[0].lastChild.textContent += " (possibly sensitive)";
          });
        }
        
        let source = tweet.getRelatedTweet();
        let duration = source ? source.text.length+(source.quotedTweet ? source.quotedTweet.text.length : 0) : tweet.text.length;
        
        let chirpId = source ? source.id : "";
        let tweetUrl = source ? source.getChirpURL() : "";
        let quoteUrl = source && source.quotedTweet ? source.quotedTweet.getChirpURL() : "";
        
        $TD.onTweetPopup(column.model.privateState.apiid, chirpId, window.TDGF_getColumnName(column), html.html(), duration, tweetUrl, quoteUrl);
      }
      
      if (column.model.getHasSound()){
        $TD.onTweetSound();
      }
    };
  })();
  
  //
  // Function: Shows tweet detail, used in notification context menu.
  //
  execSafe(function setupShowTweetDetail(){
    throw 1 if !ensurePropertyExists(TD, "ui", "updates", "showDetailView");
    throw 2 if !ensurePropertyExists(TD, "controller", "columnManager", "showColumn");
    throw 3 if !ensurePropertyExists(TD, "controller", "columnManager", "getByApiid");
    throw 4 if !ensurePropertyExists(TD, "controller", "clients", "getPreferredClient");
    
    const showTweetDetailInternal = function(column, chirp){
      TD.ui.updates.showDetailView(column, chirp, column.findChirp(chirp) || chirp);
      TD.controller.columnManager.showColumn(column.model.privateState.key);
      
      $(document).trigger("uiGridClearSelection");
    };
    
    window.TDGF_showTweetDetail = function(columnId, chirpId, fallbackUrl){
      if (!TD.ready){
        onAppReady.push(function(){
          window.TDGF_showTweetDetail(columnId, chirpId, fallbackUrl);
        });
        
        return;
      }
      
      let column = TD.controller.columnManager.getByApiid(columnId);
      
      if (!column){
        if (confirm("error|The column which contained the tweet no longer exists. Would you like to open the tweet in your browser instead?")){
          $TD.openBrowser(fallbackUrl);
        }
        
        return;
      }
      
      let chirp = column.findMostInterestingChirp(chirpId);
      
      if (chirp){
        showTweetDetailInternal(column, chirp);
      }
      else{
        TD.controller.clients.getPreferredClient().show(chirpId, function(chirp){
          showTweetDetailInternal(column, chirp);
        }, function(){
          if (confirm("error|Could not retrieve the requested tweet. Would you like to open the tweet in your browser instead?")){
            $TD.openBrowser(fallbackUrl);
          }
        });
      }
    };
  }, function(){
    window.TDGF_showTweetDetail = function(){
      alert("error|This feature is not available due to an internal error.");
    };
  });
  
  //
  // Block: Hook into settings object to detect when the settings change, and update html attributes and notification layout.
  //
  execSafe(function hookTweetDeckSettings(){
    throw 1 if !ensurePropertyExists(TD, "settings", "getFontSize");
    throw 2 if !ensurePropertyExists(TD, "settings", "setFontSize");
    throw 3 if !ensurePropertyExists(TD, "settings", "getTheme");
    throw 4 if !ensurePropertyExists(TD, "settings", "setTheme");
    
    const refreshSettings = function(){
      let fontSizeName = TD.settings.getFontSize();
      let themeName = TD.settings.getTheme();
      
      let columnBackground = getClassStyleProperty("column", "background-color");
      
      let tags = [
        "<html "+Array.prototype.map.call(document.documentElement.attributes, ele => `${ele.name}="${ele.value}"`).join(" ")+"><head>"
      ];
      
      $(document.head).children("link[rel='stylesheet'],meta[charset]").each(function(){
        tags.push($(this)[0].outerHTML);
      });
      
      tags.push("<style type='text/css'>body { background: "+columnBackground+" !important }</style>");
      
      doc.setAttribute("data-td-font", fontSizeName);
      doc.setAttribute("data-td-theme", themeName);
      $TD.loadNotificationLayout(fontSizeName, tags.join(""));
    };
    
    TD.settings.setFontSize = appendToFunction(TD.settings.setFontSize, function(name){
      setTimeout(refreshSettings, 0);
    });
    
    TD.settings.setTheme = appendToFunction(TD.settings.setTheme, function(name){
      setTimeout(refreshSettings, 0);
    });
    
    onAppReady.push(refreshSettings);
  });
  
  //
  // Block: Fix OS name and add ID to the document for priority CSS selectors.
  //
  if (ensurePropertyExists(TD, "util", "getOSName")){
    TD.util.getOSName = function(){
      return "windows";
    };
    
    doc.classList.remove("os-");
    doc.classList.add("os-windows");
  }
  
  doc.id = "tduck";
  
  //
  // Block: Enable popup notifications.
  //
  execSafe(function hookDesktopNotifications(){
    throw 1 if !ensurePropertyExists(TD, "controller", "notifications");
    
    TD.controller.notifications.hasNotifications = function(){
      return true;
    };
    
    TD.controller.notifications.isPermissionGranted = function(){
      return true;
    };
    
    $.subscribe("/notifications/new", function(obj){
      for(let index = obj.items.length-1; index >= 0; index--){
        onNewTweet(obj.column, obj.items[index]);
      }
    });
  });
  
  //
  // Block: Add TweetDuck buttons to the settings menu.
  //
  onAppReady.push(function setupSettingsDropdown(){
    $$("[data-action='settings-menu']").click(function(){
      setTimeout(function(){
        let menu = $(".js-dropdown-content").children("ul").first();
        return if menu.length === 0;
        
        let button = $('<li class="is-selectable" data-tweetduck><a href="#" data-action>TweetDuck</a></li>');
        button.insertBefore(menu.children(".drp-h-divider").last());
        
        button.on("click", "a", function(){
          $TD.openContextMenu();
        });
        
        button.hover(function(){
          $(this).addClass("is-selected");
        }, function(){
          $(this).removeClass("is-selected");
        });
      }, 0);
    });
  });
  
  //
  // Block: Expand shortened links on hover or display tooltip.
  //
  execSafe(function setupLinkExpansionOrTooltip(){
    let prevMouseX = -1, prevMouseY = -1;
    let tooltipTimer, tooltipDisplayed;
    
    $(document.body).delegate("a[data-full-url]", {
      mouseenter: function(){
        let me = $(this);
        let text = me.text();
        return if text.charCodeAt(text.length-1) !== 8230 && text.charCodeAt(0) !== 8230; // horizontal ellipsis
        
        if ($TDX.expandLinksOnHover){
          tooltipTimer = window.setTimeout(function(){
            me.attr("td-prev-text", text);
            me.text(me.attr("data-full-url").replace(/^https?:\/\/(www\.)?/, ""));
          }, 200);
        }
        else{
          tooltipTimer = window.setTimeout(function(){
            $TD.displayTooltip(me.attr("data-full-url"));
            tooltipDisplayed = true;
          }, 400);
        }
      },
      
      mouseleave: function(){
        let me = $(this);
        
        if (me[0].hasAttribute("td-prev-text")){
          me.text(me.attr("td-prev-text"));
        }
        
        window.clearTimeout(tooltipTimer);
        
        if (tooltipDisplayed){
          tooltipDisplayed = false;
          $TD.displayTooltip(null);
        }
      },
      
      mousemove: function(e){
        if (tooltipDisplayed && (prevMouseX !== e.clientX || prevMouseY !== e.clientY)){
          $TD.displayTooltip($(this).attr("data-full-url"));
          prevMouseX = e.clientX;
          prevMouseY = e.clientY;
        }
      }
    });
  });
  
  //
  // Block: Bypass t.co when clicking/dragging links and media.
  //
  execSafe(function setupShortenerBypass(){
    $(document.body).delegate("a[data-full-url]", "click auxclick", function(e){
      if (e.button === 0 || e.button === 1){ // event.which seems to be borked in auxclick
        $TD.openBrowser($(this).attr("data-full-url"));
        e.preventDefault();
      }
    });
    
    $(document.body).delegate("a[data-full-url]", "dragstart", function(e){
      let url = $(this).attr("data-full-url");
      let data = e.originalEvent.dataTransfer;
      
      data.clearData();
      data.setData("text/uri-list", url);
      data.setData("text/plain", url);
      data.setData("text/html", `<a href="${url}">${url}</a>`);
    });
    
    if (ensurePropertyExists(TD, "services", "TwitterMedia", "prototype", "fromMediaEntity")){
      const prevFunc = TD.services.TwitterMedia.prototype.fromMediaEntity;
      
      TD.services.TwitterMedia.prototype.fromMediaEntity = function(){
        let obj = prevFunc.apply(this, arguments);
        let e = arguments[0];
        
        if (e.expanded_url){
          if (obj.url === obj.shortUrl){
            obj.shortUrl = e.expanded_url;
          }
          
          obj.url = e.expanded_url;
        }
        
        return obj;
      };
    }
  });
  
  //
  // Block: Bypass t.co in user profiles and setup a top tier account bamboozle scheme.
  //
  execSafe(function setupAccountLoadHook(){
    const realDisplayName = "TweetDuck";
    const realAvatar = "https://ton.twimg.com/tduck/avatar";
    const accountId = "957608948189880320";
    
    if (ensurePropertyExists(TD, "services", "TwitterUser", "prototype", "fromJSONObject")){
      const prevFunc = TD.services.TwitterUser.prototype.fromJSONObject;
      
      TD.services.TwitterUser.prototype.fromJSONObject = function(){
        let obj = prevFunc.apply(this, arguments);
        let e = arguments[0].entities;
        
        if (obj.id === accountId){
          obj.name = realDisplayName;
          obj.emojifiedName = realDisplayName;
          obj.profileImageURL = realAvatar;
          obj.url = "https://tweetduck.chylex.com";
          
          if (obj.entities && obj.entities.url){
            obj.entities.url.urls = [{
              url: obj.url,
              expanded_url: obj.url,
              display_url: "tweetduck.chylex.com",
              indices: [ 0, 23 ]
            }];
          }
        }
        else if (e && e.url && e.url.urls && e.url.urls.length && e.url.urls[0].expanded_url){
          obj.url = e.url.urls[0].expanded_url;
        }
        
        return obj;
      };
    }
    
    if (ensurePropertyExists(TD, "services", "TwitterClient", "prototype", "typeaheadSearch")){
      const prevFunc = TD.services.TwitterClient.prototype.typeaheadSearch;
      
      TD.services.TwitterClient.prototype.typeaheadSearch = function(data, onSuccess, onError){
        if (data.query && data.query.toLowerCase().endsWith("tweetduck")){
          data.query = "TryMyAwesomeApp";
        }
        
        return prevFunc.call(this, data, function(result){
          for(let user of result.users){
            if (user.id_str === accountId){
              user.name = realDisplayName;
              user.profile_image_url = realAvatar;
              user.profile_image_url_https = realAvatar;
              break;
            }
          }
          
          onSuccess.apply(this, arguments);
        }, onError);
      };
    }
  });
  
  //
  // Block: Include additional information in context menus.
  //
  execSafe(function setupContextMenuInfo(){
    $(document.body).delegate("a", "contextmenu", function(){
      let me = $(this)[0];
      
      if (me.classList.contains("js-media-image-link")){
        let hovered = getHoveredTweet();
        return if !hovered;
        
        let tweet = hovered.obj.hasMedia() ? hovered.obj : hovered.obj.quotedTweet;
        let media = tweet.getMedia().find(media => media.mediaId === me.getAttribute("data-media-entity-id"));
        
        if ((media.isVideo && media.service === "twitter") || media.isAnimatedGif){
          $TD.setRightClickedLink("video", media.chooseVideoVariant().url);
        }
        else{
          $TD.setRightClickedLink("image", media.large());
        }
      }
      else if (me.classList.contains("js-gif-play")){
        $TD.setRightClickedLink("video", $(this).closest(".js-media-gif-container").find("video").attr("src"));
      }
      else if (me.hasAttribute("data-full-url")){
        $TD.setRightClickedLink("link", me.getAttribute("data-full-url"));
      }
    });
  });
  
  //
  // Block: Hook into the notification sound effect.
  //
  HTMLAudioElement.prototype.play = prependToFunction(HTMLAudioElement.prototype.play, function(){
    return $TDX.muteNotifications;
  });
  
  window.TDGF_setSoundNotificationData = function(custom, volume){
    let audio = document.getElementById("update-sound");
    audio.volume = volume/100;
    
    const sourceId = "tduck-custom-sound-source";
    let source = document.getElementById(sourceId);
    
    if (custom && !source){
      source = document.createElement("source");
      source.id = sourceId;
      source.src = "https://ton.twimg.com/tduck/updatesnd";
      audio.prepend(source);
    }
    else if (!custom && source){
      audio.removeChild(source);
    }
    
    audio.load();
  };
  
  window.TDGF_playSoundNotification = function(){
    document.getElementById("update-sound").play();
  };
  
  //
  // Block: Add tweet-related options to the context menu.
  //
  execSafe(function setupTweetContextMenu(){
    throw 1 if !ensurePropertyExists(TD, "controller", "columnManager", "get");
    throw 2 if !ensurePropertyExists(TD, "services", "ChirpBase", "TWEET");
    throw 3 if !ensurePropertyExists(TD, "services", "TwitterActionFollow");
    
    const processMedia = function(chirp){
      return chirp.getMedia().filter(item => !item.isAnimatedGif).map(item => item.entity.media_url_https+":small").join(";");
    };
    
    app.delegate("section.js-column", {
      contextmenu: function(){
        let hovered = getHoveredTweet();
        return if !hovered;
        
        let tweet = hovered.obj;
        let quote = tweet.quotedTweet;
        
        if (tweet.chirpType === TD.services.ChirpBase.TWEET){
          let tweetUrl = tweet.getChirpURL();
          let quoteUrl = quote && quote.getChirpURL();
          
          let chirpAuthors = quote ? [ tweet.getMainUser().screenName, quote.getMainUser().screenName ].join(";") : tweet.getMainUser().screenName;
          let chirpImages = tweet.hasImage() ? processMedia(tweet) : quote && quote.hasImage() ? processMedia(quote) : "";
          
          $TD.setRightClickedChirp(tweetUrl || "", quoteUrl || "", chirpAuthors, chirpImages);
        }
        else if (tweet instanceof TD.services.TwitterActionFollow){
          $TD.setRightClickedLink("link", tweet.following.getProfileURL());
        }
      }
    });
  });
  
  //
  // Block: Screenshot tweet to clipboard.
  //
  execSafe(function setupTweetScreenshot(){
    window.TDGF_triggerScreenshot = function(){
      let hovered = getHoveredTweet();
      return if !hovered;
      
      let columnWidth = $(hovered.column.ele).width();
      let tweet = hovered.wrap || hovered.obj;
      
      let html = $(tweet.render({
        withFooter: false,
        withTweetActions: false,
        isInConvo: false,
        isFavorite: false,
        isRetweeted: false, // keeps retweet mark above tweet
        isPossiblySensitive: false,
        mediaPreviewSize: hovered.column.obj.getMediaPreviewSize()
      }));
      
      html.find("footer").last().remove(); // apparently withTweetActions breaks for certain tweets, nice
      html.find(".td-screenshot-remove").remove();
      
      html.find("p.link-complex-target,p.txt-mute").filter(function(){
        return $(this).text() === "Show this thread";
      }).remove();
      
      html.addClass($(document.documentElement).attr("class"));
      html.addClass($(document.body).attr("class"));
      
      html.css("background-color", getClassStyleProperty("column", "background-color"));
      html.css("border", "none");
      
      for(let selector of [ ".js-quote-detail", ".js-media-preview-container", ".js-media" ]){
        let ele = html.find(selector);
        
        if (ele.length){
          ele[0].style.setProperty("margin-bottom", "2px", "important");
          break;
        }
      }
      
      let gif = html.find(".js-media-gif-container");
      
      if (gif.length){
        gif.css("background-image", 'url("'+tweet.getMedia()[0].small()+'")');
      }
      
      let type = tweet.getChirpType();
      
      if ((type.startsWith("favorite") || type.startsWith("retweet")) && tweet.isAboutYou()){
        html.addClass("td-notification-padded");
      }
      
      $TD.screenshotTweet(html[0].outerHTML, columnWidth);
    };
  }, function(){
    window.TDGF_triggerScreenshot = function(){
      alert("error|This feature is not available due to an internal error.");
    };
  });
  
  //
  // Block: Paste images when tweeting.
  //
  onAppReady.push(function supportImagePaste(){
    const uploader = $._data(document, "events")["uiComposeAddImageClick"][0].handler.context;
    
    app.delegate(".js-compose-text,.js-reply-tweetbox,.td-detect-image-paste", "paste", function(e){
      for(let item of e.originalEvent.clipboardData.items){
        if (item.type.startsWith("image/")){
          if (!$(this).closest(".rpl").find(".js-reply-popout").click().length){ // popout direct messages
            return if $(".js-add-image-button").is(".is-disabled"); // tweetdeck does not check upload count properly
          }
          
          uploader.addFilesToUpload([ item.getAsFile() ]);
          
          $(".js-compose-text", ".js-docked-compose").focus();
          break;
        }
      }
    });
  });
  
  //
  // Block: Setup a global function to reorder event priority.
  //
  window.TDGF_prioritizeNewestEvent = function(element, event){
    let events = $._data(element, "events");
    
    let handlers = events[event];
    let newHandler = handlers[handlers.length-1];
    
    for(let index = handlers.length-1; index > 0; index--){
      handlers[index] = handlers[index-1];
    }
    
    handlers[0] = newHandler;
  };
  
  //
  // Block: Support for extra mouse buttons.
  //
  execSafe(function supportExtraMouseButtons(){
    const tryClickSelector = function(selector, parent){
      return $(selector, parent).click().length;
    };
    
    const tryCloseModal1 = function(){
      let modal = $("#open-modal");
      return modal.is(":visible") && tryClickSelector("a.mdl-dismiss", modal);
    };
    
    const tryCloseModal2 = function(){
      let modal = $(".js-modals-container");
      return modal.length && tryClickSelector("a.mdl-dismiss", modal);
    };
    
    const tryCloseHighlightedColumn = function(){
      let column = getHoveredColumn();
      return false if !column;
      
      let ele = $(column.ele);
      return ((ele.is(".is-shifted-2") && tryClickSelector(".js-tweet-social-proof-back", ele)) || (ele.is(".is-shifted-1") && tryClickSelector(".js-column-back", ele)));
    };
    
    window.TDGF_onMouseClickExtra = function(button){
      if (button === 1){ // back button
        tryClickSelector(".is-shifted-2 .js-tweet-social-proof-back", ".js-modal-panel") ||
        tryClickSelector(".is-shifted-1 .js-column-back", ".js-modal-panel") ||
        tryCloseModal1() ||
        tryCloseModal2() ||
        tryClickSelector(".js-inline-compose-close") ||
        tryCloseHighlightedColumn() ||
        tryClickSelector(".js-app-content.is-open .js-drawer-close:visible") ||
        tryClickSelector(".is-shifted-2 .js-tweet-social-proof-back, .is-shifted-2 .js-dm-participants-back") ||
        $(".is-shifted-1 .js-column-back").click();
      }
      else if (button === 2){ // forward button
        let hovered = getHoveredTweet();
        
        if (hovered){
          $(hovered.ele).children().first().click();
        }
      }
    };
  });
  
  //
  // Block: Allow drag & drop behavior for dropping links on columns to open their detail view.
  //
  execSafe(function supportDragDropOverColumns(){
    const tweetRegex = /^https?:\/\/twitter\.com\/[A-Za-z0-9_]+\/status\/(\d+)\/?\??/;
    const selector = "section.js-column";
    
    let isDraggingValid = false;
    
    const events = {
      dragover: function(e){
        e.originalEvent.dataTransfer.dropEffect = isDraggingValid ? "all" : "none";
        e.preventDefault();
        e.stopPropagation();
      },
      
      drop: function(e){
        let match = tweetRegex.exec(e.originalEvent.dataTransfer.getData("URL"));
        
        if (match.length === 2){
          let column = TD.controller.columnManager.get($(this).attr("data-column"));
          
          if (column){
            TD.controller.clients.getPreferredClient().show(match[1], function(chirp){
              TD.ui.updates.showDetailView(column, chirp, column.findChirp(chirp) || chirp);
              $(document).trigger("uiGridClearSelection");
            }, function(){
              alert("error|Could not retrieve the requested tweet.");
            });
          }
        }
        
        e.preventDefault();
        e.stopPropagation();
      }
    };
    
    window.TDGF_onGlobalDragStart = function(type, data){
      if (type === "link"){
        isDraggingValid = tweetRegex.test(data);
        app.delegate(selector, events);
      }
      else{
        app.undelegate(selector, events);
      }
    };
  });
  
  //
  // Block: Fix scheduled tweets not showing up sometimes.
  //
  execSafe(function fixScheduledTweets(){
    throw 1 if !ensurePropertyExists(TD, "controller", "columnManager", "getAll");
    
    $(document).on("dataTweetSent", function(e, data){
      if (data.response.state && data.response.state === "scheduled"){
        let column = Object.values(TD.controller.columnManager.getAll()).find(column => column.model.state.type === "scheduled");
        
        if (column){
          setTimeout(function(){
            column.reloadTweets();
          }, 1000);
        }
      }
    });
  });
  
  //
  // Block: Hold Shift to restore cleared column.
  //
  execSafe(function supportShiftToClearColumn(){
    throw 1 if !ensurePropertyExists(TD, "vo", "Column", "prototype", "clear");
    
    let holdingShift = false;
    
    const updateShiftState = (pressed) => {
      if (pressed != holdingShift){
        holdingShift = pressed;
        $("button[data-action='clear']").children("span").text(holdingShift ? "Restore" : "Clear");
      }
    };
    
    const resetActiveFocus = () => {
      document.activeElement.blur();
    };
    
    $(document).keydown(function(e){
      if (e.shiftKey && (document.activeElement === null || !("value" in document.activeElement))){
        updateShiftState(true);
      }
    }).keyup(function(e){
      if (!e.shiftKey){
        updateShiftState(false);
      }
    });
    
    TD.vo.Column.prototype.clear = prependToFunction(TD.vo.Column.prototype.clear, function(){
      window.setTimeout(resetActiveFocus, 0); // unfocuses the Clear button, otherwise it steals keyboard input
      
      if (holdingShift){
        this.model.setClearedTimestamp(0);
        this.reloadTweets();
        return true;
      }
    });
  });
  
  //
  // Block: Refocus the textbox after switching accounts.
  //
  onAppReady.push(function setupAccountSwitchRefocus(){
    const composeInput = $$(".js-compose-text", ".js-docked-compose");
    
    const refocusInput = function(){
      composeInput.focus();
    };
    
    $$(".js-account-list", ".js-docked-compose").delegate(".js-account-item", "click", function(e){
      setTimeout(refocusInput, 0);
    });
  });
  
  //
  // Block: Make middle click on tweet reply icon open the compose drawer, retweet icon trigger a quote, and favorite icon open a 'Like from accounts...' modal.
  //
  execSafe(function supportMiddleClickTweetActions(){
    app.delegate(".tweet-action,.tweet-detail-action", "auxclick", function(e){
      return if e.which !== 2;
      
      let column = TD.controller.columnManager.get($(this).closest("section.js-column").attr("data-column"));
      return if !column;
      
      let ele = $(this).closest("article");
      let tweet = column.findChirp(ele.attr("data-tweet-id")) || column.findChirp(ele.attr("data-key"));
      return if !tweet;
      
      switch($(this).attr("rel")){
        case "reply":
          let main = tweet.getMainTweet();
          
          $(document).trigger("uiDockedComposeTweet", {
            type: "reply",
            from: [ tweet.account.getKey() ],
            inReplyTo: {
              id: tweet.id,
              htmlText: main.htmlText,
              user: {
                screenName: main.user.screenName,
                name: main.user.name,
                profileImageURL: main.user.profileImageURL
              }
            },
            mentions: tweet.getReplyUsers(),
            element: ele
          });
          
          break;
          
        case "favorite":
          $(document).trigger("uiShowFavoriteFromOptions", { tweet });
          break;
          
        case "retweet":
          TD.controller.stats.quoteTweet();
          
          $(document).trigger("uiComposeTweet", {
            type: "tweet",
            from: [ tweet.account.getKey() ],
            quotedTweet: tweet.getMainTweet(),
            element: ele // triggers reply-account plugin
          });
          
          break;
        
        default:
          return;
      }
      
      e.preventDefault();
      e.stopPropagation();
      e.stopImmediatePropagation();
    });
  });
  
  //
  // Block: Work around clipboard HTML formatting.
  //
  document.addEventListener("copy", function(){
    window.setTimeout($TD.fixClipboard, 0);
  });
  
  //
  // Block: Inject custom CSS and layout into the page.
  //
  execSafe(function setupStyleInjection(){
    const createStyle = function(id, styles){
      let ele = document.createElement("style");
      ele.id = id;
      ele.innerText = styles;
      document.head.appendChild(ele);
    };
    
    window.TDGF_injectBrowserCSS = function(styles){
      if (!document.getElementById("tweetduck-browser-css")){
        createStyle("tweetduck-browser-css", styles);
      }
    };
    
    window.TDGF_reinjectCustomCSS = function(styles){
      $("#tweetduck-custom-css").remove();
      
      if (styles && styles.length){
        createStyle("tweetduck-custom-css", styles);
      }
    };
  });
  
  //
  // Block: Setup global function to inject custom HTML into mustache templates.
  //
  window.TDGF_injectMustache = function(name, operation, search, custom){
    let replacement;
    
    switch(operation){
      case "replace": replacement = custom; break;
      case "append": replacement = search+custom; break;
      case "prepend": replacement = custom+search; break;
      default: throw "Invalid mustache injection operation. Only 'replace', 'append', 'prepend' are supported.";
    }
    
    let prev = TD.mustaches && TD.mustaches[name];
    
    if (!prev){
      $TD.crashDebug("Mustache injection is referencing an invalid mustache: "+name);
      return false;
    }
    
    TD.mustaches[name] = prev.replace(search, replacement);
    
    if (prev === TD.mustaches[name]){
      $TD.crashDebug("Mustache injection had no effect: "+name);
      return false;
    }
    
    return true;
  };
  
  //
  // Block: Let's make retweets lowercase again.
  //
  window.TDGF_injectMustache("status/tweet_single.mustache", "replace", "{{_i}} Retweeted{{/i}}", "{{_i}} retweeted{{/i}}");
  
  if (ensurePropertyExists(TD, "services", "TwitterActionRetweet", "prototype", "generateText")){
    TD.services.TwitterActionRetweet.prototype.generateText = appendToFunction(TD.services.TwitterActionRetweet.prototype.generateText, function(){
      this.text = this.text.replace(" Retweeted", " retweeted");
      this.htmlText = this.htmlText.replace(" Retweeted", " retweeted");
    });
  }
  
  if (ensurePropertyExists(TD, "services", "TwitterActionRetweetedInteraction", "prototype", "generateText")){
    TD.services.TwitterActionRetweetedInteraction.prototype.generateText = appendToFunction(TD.services.TwitterActionRetweetedInteraction.prototype.generateText, function(){
      this.htmlText = this.htmlText.replace(" Retweeted", " retweeted").replace(" Retweet", " retweet");
    });
  }
  
  //
  // Block: Setup video player hooks.
  //
  execSafe(function setupVideoPlayer(){
    window.TDGF_playVideo = function(url, username){
      $('<div id="td-video-player-overlay" class="ovl" style="display:block"></div>').on("click contextmenu", function(){
        $TD.playVideo(null, null);
      }).appendTo(app);
      
      $TD.playVideo(url, username || null);
    };
    
    const getGifLink = function(ele){
      return ele.attr("src") || ele.children("source[video-src]").first().attr("video-src");
    };
    
    const getVideoTweetLink = function(obj){
      let parent = obj.closest(".js-tweet").first();
      let link = (parent.hasClass("tweet-detail") ? parent.find("a[rel='url']") : parent.find("time").first().children("a")).first();
      return link.attr("href");
    };
    
    const getUsername = function(tweet){
      return tweet && (tweet.quotedTweet || tweet).getMainUser().screenName;
    };
    
    app.delegate(".js-gif-play", {
      click: function(e){
        let src = !e.ctrlKey && getGifLink($(this).closest(".js-media-gif-container").find("video"));
        
        if (src){
          let hovered = getHoveredTweet();
          window.TDGF_playVideo(src, getUsername(hovered && hovered.obj));
        }
        else{
          $TD.openBrowser(getVideoTweetLink($(this)));
        }
        
        e.stopPropagation();
      },
      
      mousedown: function(e){
        if (e.button === 1){
          e.preventDefault();
        }
      },
      
      mouseup: function(e){
        if (e.button === 1){
          $TD.openBrowser(getVideoTweetLink($(this)));
          e.preventDefault();
        }
      }
    });
    
    window.TDGF_injectMustache("status/media_thumb.mustache", "append", "is-gif", " is-paused");
    
    TD.mustaches["media/native_video.mustache"] = '<div class="js-media-gif-container media-item nbfc is-video" style="background-image:url({{imageSrc}})"><video class="js-media-gif media-item-gif full-width block {{#isPossiblySensitive}}is-invisible{{/isPossiblySensitive}}" loop src="{{videoUrl}}"></video><a class="js-gif-play pin-all is-actionable">{{> media/video_overlay}}</a></div>';
    
    throw 1 if !ensurePropertyExists(TD, "components", "MediaGallery", "prototype", "_loadTweet");
    throw 2 if !ensurePropertyExists(TD, "components", "BaseModal", "prototype", "setAndShowContainer");
    throw 3 if !ensurePropertyExists(TD, "ui", "Column", "prototype", "playGifIfNotManuallyPaused");
    
    let cancelModal = false;
    
    TD.components.MediaGallery.prototype._loadTweet = appendToFunction(TD.components.MediaGallery.prototype._loadTweet, function(){
      let media = this.chirp.getMedia().find(media => media.mediaId === this.clickedMediaEntityId);
      
      if (media && media.isVideo && media.service === "twitter"){
        window.TDGF_playVideo(media.chooseVideoVariant().url, getUsername(this.chirp));
        cancelModal = true;
      }
    });
    
    TD.components.BaseModal.prototype.setAndShowContainer = prependToFunction(TD.components.BaseModal.prototype.setAndShowContainer, function(){
      if (cancelModal){
        cancelModal = false;
        return true;
      }
    });
    
    TD.ui.Column.prototype.playGifIfNotManuallyPaused = function(){};
  }, function(){
    window.TDGF_playVideo = function(){
      alert("error|This feature is not available due to an internal error.");
    };
  });
  
  //
  // Block: Fix youtu.be previews not showing up for https links.
  //
  if (ensurePropertyExists(TD, "services", "TwitterMedia")){
    let media = TD.services.TwitterMedia;
    
    return if !ensurePropertyExists(media, "YOUTUBE_TINY_RE");
    return if !ensurePropertyExists(media, "YOUTUBE_LONG_RE");
    return if !ensurePropertyExists(media, "YOUTUBE_RE");
    return if !ensurePropertyExists(media, "SERVICES", "youtube");
    
    media.YOUTUBE_TINY_RE = new RegExp(media.YOUTUBE_TINY_RE.source.replace("http:", "https?:"));
    media.YOUTUBE_RE = new RegExp(media.YOUTUBE_LONG_RE.source+"|"+media.YOUTUBE_TINY_RE.source);
    media.SERVICES["youtube"] = media.YOUTUBE_RE;
  }
  
  //
  // Block: Add a pin icon to make tweet compose drawer stay open.
  //
  onAppReady.push(function setupStayOpenPin(){
    let ele = $(`
<svg id="td-compose-drawer-pin" viewBox="0 0 24 24" class="icon js-show-tip" data-original-title="Stay open" data-tooltip-position="left">
 <path d="M9.884,16.959l3.272,0.001l-0.82,4.568l-1.635,0l-0.817,-4.569Z"/>
 <rect x="8.694" y="7.208" width="5.652" height="7.445"/>
 <path d="M16.877,17.448c0,-1.908 -1.549,-3.456 -3.456,-3.456l-3.802,0c-1.907,0 -3.456,1.548 -3.456,3.456l10.714,0Z"/>
 <path d="M6.572,5.676l2.182,2.183l5.532,0l2.182,-2.183l0,-1.455l-9.896,0l0,1.455Z"/>
</svg>`).appendTo(".js-docked-compose .js-compose-header");
    
    ele.click(function(){
      if (TD.settings.getComposeStayOpen()){
        ele.css("transform", "rotate(0deg)");
        TD.settings.setComposeStayOpen(false);
      }
      else{
        ele.css("transform", "rotate(90deg)");
        TD.settings.setComposeStayOpen(true);
      }
    });
    
    if (TD.settings.getComposeStayOpen()){
      ele.css("transform", "rotate(90deg)");
    }
  });
  
  //
  // Block: Make temporary search column appear as the first one and clear the input box.
  //
  execSafe(function setupSearchColumnHook(){
    throw 1 if !ensurePropertyExists(TD, "controller", "columnManager", "_columnOrder");
    throw 2 if !ensurePropertyExists(TD, "controller", "columnManager", "move");
    
    $(document).on("uiSearchNoTemporaryColumn", function(e, data){
      if (data.query && data.searchScope !== "users" && !data.columnKey){
        if ($TDX.openSearchInFirstColumn){
          let order = TD.controller.columnManager._columnOrder;
          
          if (order.length > 1){
            let columnKey = order[order.length-1];
            
            order.splice(order.length-1, 1);
            order.splice(1, 0, columnKey);
            TD.controller.columnManager.move(columnKey, "left");
          }
        }
        
        if (!("tweetduck" in data)){
          $(".js-app-search-input").val("");
          $(".js-perform-search").blur();
        }
      }
    });
  });
  
  //
  // Block: Setup global function to add a search column with the specified query.
  //
  onAppReady.push(() => execSafe(function setupSearchFunction(){
    let context = $._data(document, "events")["uiSearchInputSubmit"][0].handler.context;
    
    window.TDGF_performSearch = function(query){
      context.performSearch({ query, tweetduck: true });
    };
  }, function(){
    window.TDGF_performSearch = function(){
      alert("error|This feature is not available due to an internal error.");
    };
  }));
  
  //
  // Block: Reorder search results to move accounts above hashtags.
  //
  onAppReady.push(function reorderSearchResults(){
    let container = $(".js-search-in-popover");
    let hashtags = $$(".js-typeahead-topic-list", container);
    
    $$(".js-typeahead-user-list", container).insertBefore(hashtags);
    hashtags.addClass("list-divider");
  });
  
  //
  // Block: Make submitting search queries while holding Ctrl or middle-clicking the search icon open the search externally.
  //
  onAppReady.push(function setupSearchTriggerHook(){
    const openSearchExternally = function(event, input){
      $TD.openBrowser("https://twitter.com/search/?q="+encodeURIComponent(input.val() || ""));
      event.preventDefault();
      event.stopPropagation();
      
      input.val("").blur();
      app.click(); // unfocus everything
    };
    
    $$(".js-app-search-input").keydown(function(e){
      (e.ctrlKey && e.keyCode === 13) && openSearchExternally(e, $(this)); // enter
    });
    
    $$(".js-perform-search").on("click auxclick", function(e){
      (e.ctrlKey || e.button === 1) && openSearchExternally(e, $(".js-app-search-input:visible"));
    }).each(function(){
      window.TDGF_prioritizeNewestEvent($(this)[0], "click");
    });
    
    $$("[data-action='show-search']").on("click auxclick", function(e){
      (e.ctrlKey || e.button === 1) && openSearchExternally(e, $());
    });
  });
  
  //
  // Block: Override language used for translations.
  //
  if (ensurePropertyExists(TD, "languages", "getSystemLanguageCode")){
    const prevFunc = TD.languages.getSystemLanguageCode;
    
    TD.languages.getSystemLanguageCode = function(returnShortCode){
      return returnShortCode ? ($TDX.translationTarget || "en") : prevFunc.apply(this, arguments);
    };
  }
  
  //
  // Block: Setup global function to refresh all columns.
  //
  if (ensurePropertyExists(TD, "controller", "columnManager", "getAll")){
    window.TDGF_reloadColumns = function(){
      Object.values(TD.controller.columnManager.getAll()).forEach(column => column.reloadTweets());
    };
  }
  else{
    window.TDGF_reloadColumns = function(){};
  }
  
  //
  // Block: Allow applying ROT13 to input selection.
  //
  window.TDGF_applyROT13 = function(){
    let ele = document.activeElement;
    return if !ele || !ele.value;
    
    let selection = ele.value.substring(ele.selectionStart, ele.selectionEnd);
    return if !selection;
    
    document.execCommand("insertText", false, selection.replace(/[a-zA-Z]/g, function(chr){
      let code = chr.charCodeAt(0);
      let start = code <= 90 ? 65 : 97;
      return String.fromCharCode(start+(code-start+13)%26);
    }));
  };
  
  //
  // Block: Revert Like/Follow dialogs being closed after clicking an action.
  //
  execSafe(function setupLikeFollowDialogRevert(){
    const prevSetTimeout = window.setTimeout;
    
    const overrideState = function(){
      return if !$TDX.keepLikeFollowDialogsOpen;
      
      window.setTimeout = function(func, timeout){
        return timeout !== 500 && prevSetTimeout.apply(this, arguments);
      };
    };
    
    const restoreState = function(context, key){
      window.setTimeout = prevSetTimeout;
      
      if ($TDX.keepLikeFollowDialogsOpen && key in context.state){
        context.state[key] = false;
      }
    };
    
    $(document).on("uiShowFavoriteFromOptions", function(){
      $(".js-btn-fav", ".js-modal-inner").each(function(){
        let event = $._data(this, "events").click[0];
        let handler = event.handler;
        
        event.handler = function(){
          overrideState();
          handler.apply(this, arguments);
          restoreState($._data(document, "events").dataFavoriteState[0].handler.context, "stopSubsequentLikes");
        };
      });
    });
    
    $(document).on("uiShowFollowFromOptions", function(){
      $(".js-component", ".js-modal-inner").each(function(){
        let event = $._data(this, "events").click[0];
        let handler = event.handler;
        let context = handler.context;
        
        event.handler = function(){
          overrideState();
          handler.apply(this, arguments);
          restoreState(context, "stopSubsequentFollows");
        };
      });
    });
  });
  
  //
  // Block: Fix DM reply input box not getting focused after opening a conversation.
  //
  if (ensurePropertyExists(TD, "components", "ConversationDetailView", "prototype", "showChirp")){
    TD.components.ConversationDetailView.prototype.showChirp = appendToFunction(TD.components.ConversationDetailView.prototype.showChirp, function(){
      setTimeout(function(){
        $(".js-reply-tweetbox").first().focus();
      }, 100);
    });
  }
  
  //
  // Block: Fix DM notifications not showing if the conversation is open.
  //
  if (ensurePropertyExists(TD, "vo", "Column", "prototype", "mergeMissingChirps")){
    TD.vo.Column.prototype.mergeMissingChirps = prependToFunction(TD.vo.Column.prototype.mergeMissingChirps, function(e){
      let model = this.model;
      
      if (model && model.state && model.state.type === "privateMe" && !this.notificationsDisabled && e.poller.feed.managed){
        let unread = [];
        
        for(let chirp of e.chirps){
          if (Array.isArray(chirp.messages)){
            Array.prototype.push.apply(unread, chirp.messages.filter(message => message.read === false));
          }
        }
        
        if (unread.length > 0){
          if (ensurePropertyExists(TD, "util", "chirpReverseColumnSort")){
            unread.sort(TD.util.chirpReverseColumnSort);
          }
          
          for(let message of unread){
            onNewTweet(this, message);
          }
          
          // TODO sound notifications are borked as well
          // TODO figure out what to do with missed notifications at startup
        }
      }
    });
  }
  
  //
  // Block: Fix DMs not being marked as read when replying to them.
  //
  execSafe(function markRepliedDMsAsRead(){
    throw 1 if !ensurePropertyExists(TD, "controller", "clients", "getClient");
    throw 2 if !ensurePropertyExists(TD, "services", "Conversations", "prototype", "getConversation");
    
    $(document).on("dataDmSent", function(e, data){
      let client = TD.controller.clients.getClient(data.request.accountKey);
      return if !client;
      
      let conversation = client.conversations.getConversation(data.request.conversationId);
      return if !conversation;
      
      conversation.markAsRead();
    });
  });
  
  //
  // Block: Limit amount of loaded DMs to avoid massive lag from re-opening them several times.
  //
  if (ensurePropertyExists(TD, "services", "TwitterConversation", "prototype", "renderThread")){
    const prevFunc = TD.services.TwitterConversation.prototype.renderThread;
    
    TD.services.TwitterConversation.prototype.renderThread = function(){
      let prevMessages = this.messages;
      
      this.messages = prevMessages.slice(0, 100);
      let result = prevFunc.apply(this, arguments);
      this.messages = prevMessages;
      
      return result;
    };
  }
  
  //
  // Block: Fix broken horizontal scrolling of column container when holding Shift. TODO Fix broken smooth scrolling.
  //
  if (ensurePropertyExists(TD, "ui", "columns", "setupColumnScrollListeners")){
    TD.ui.columns.setupColumnScrollListeners = appendToFunction(TD.ui.columns.setupColumnScrollListeners, function(column){
      let ele = $(".js-column[data-column='"+column.model.getKey()+"']");
      return if !ele.length;
      
      ele.off("onmousewheel").on("mousewheel", ".scroll-v", function(e){
        if (e.shiftKey){
          e.stopImmediatePropagation();
        }
      });
      
      window.TDGF_prioritizeNewestEvent(ele[0], "mousewheel");
    });
  }
  
  //
  // Block: Detect and notify about connection issues.
  //
  (function(){
    const onConnectionError = function(){
      return if $("#tweetduck-conn-issues").length;
      
      let ele = $(`
<div id="tweetduck-conn-issues" class="Layer NotificationListLayer">
  <ul class="NotificationList">
    <li class="Notification Notification--red" style="height:63px;">
      <div class="Notification-inner">
        <div class="Notification-icon"><span class="Icon Icon--medium Icon--circleError"></span></div>
        <div class="Notification-content"><div class="Notification-body">Experiencing connection issues</div></div>
        <button type="button" class="Notification-closeButton" aria-label="Close"><span class="Icon Icon--smallest Icon--close" aria-hidden="true"></span></button>
      </div>
    </li>
  </ul>
</div>`).appendTo(document.body);
      
      ele.find("button").click(function(){
        ele.fadeOut(200);
      });
    };
    
    const onConnectionFine = function(){
      let ele = $("#tweetduck-conn-issues");
      
      ele.fadeOut(200, function(){
        ele.remove();
      });
    };
    
    window.addEventListener("offline", onConnectionError);
    window.addEventListener("online", onConnectionFine);
  })();
  
  //
  // Block: Custom reload function with memory cleanup.
  //
  window.TDGF_reload = function(){
    window.gc && window.gc();
    window.location.reload();
    
    window.TDGF_reload = function(){}; // redefine to prevent reloading multiple times
  };
  
  //
  // Block: Disable default TweetDeck update notification.
  //
  execSafe(function disableTweetDeckUpdates(){
    $(document).on("uiSuggestRefreshToggle", function(e){
      e.stopImmediatePropagation();
    });
  });
  
  //
  // Block: Disable TweetDeck metrics.
  //
  if (ensurePropertyExists(TD, "metrics")){
    const noop = function(){};
    TD.metrics.inflate = noop;
    TD.metrics.inflateMetricTriple = noop;
    TD.metrics.log = noop;
    TD.metrics.makeKey = noop;
    TD.metrics.send = noop;
  }
  
  onAppReady.push(function disableMetrics(){
    let data = $._data(window);
    delete data.events["metric"];
    delete data.events["metricsFlush"];
  });
  
  //
  // Block: Register the TD.ready event, finish initialization, and load plugins.
  //
  $(document).one("TD.ready", function(){
    onAppReady.forEach(func => execSafe(func));
    onAppReady = null;
    
    if (window.TD_PLUGINS){
      window.TD_PLUGINS.onReady();
    }
  });
  
  //
  // Block: Skip the initial pre-login page.
  //
  if (ensurePropertyExists(TD, "controller", "init", "showLogin")){
    TD.controller.init.showLogin = function(){
      location.href = "https://twitter.com/login?hide_message=true&redirect_after_login=https%3A%2F%2Ftweetdeck.twitter.com%2F%3Fvia_twitter_login%3Dtrue";
    };
  }
})($TD, $TDX, window.$, window.TD || {});