/*******************************************************************************
 * ***** BEGIN LICENSE BLOCK Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with the
 * License. You may obtain a copy of the License at http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
 * the specific language governing rights and limitations under the License.
 *
 * The Original Code is Bugzilla Tweaks.
 *
 * The Initial Developer of the Original Code is Mozilla Foundation. Portions
 * created by the Initial Developer are Copyright (C) 2010 the Initial
 * Developer. All Rights Reserved.
 *
 * Contributor(s): Johnathan Nightingale <johnath@mozilla.com> Ehsan Akhgari
 * <ehsan@mozilla.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or the
 * GNU Lesser General Public License Version 2.1 or later (the "LGPL"), in which
 * case the provisions of the GPL or the LGPL are applicable instead of those
 * above. If you wish to allow use of your version of this file only under the
 * terms of either the GPL or the LGPL, and not to allow others to use your
 * version of this file under the terms of the MPL, indicate your decision by
 * deleting the provisions above and replace them with the notice and other
 * provisions required by the GPL or the LGPL. If you do not delete the
 * provisions above, a recipient may use your version of this file under the
 * terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK *****
 */

function TweakOnMessageHandler(msg, nextHandler) {
  switch (msg.cmd) {
  case "Unhandled":
    break;
  case "returnedHistory":
    processHistory(msg.data);
    break;
  default:
    if (nextHandler) {
      nextHandler(msg);
    }
    else {
      console.error("Error: unknown RPC call " + msg.toSource());
    }
  break;
  }
}

/**
 * generate XML-RPC call to collect complete history of the bug
 * @param XMLRPCURL URL of the XML-RPC gateway on the particular bugzilla
 * @returns nothing
 *
 * As part of the message is name of the signal "returnedHistory"
 */
function collectHistory(rpcURL) {
  // https://bugzilla.redhat.com/docs/en/html/api/Bugzilla\
  // /WebService/Bug.html#Bug_Information
  var bugId = getBugNo();
  self.postMessage(new Message("MakeJSONRPCall", {
    url : rpcURL.replace("xmlrpc.cgi","jsonrpc.cgi"),
    login : getLogin(),
    method : "Bug.history",
    params : { "ids": [ bugId ] },
    callRPC : "returnedHistory"
  }));
}

function tweakBugzilla(atts, cData) {
  // Add links for creating new bug in the same product
  // and same component
  addNewLinks();

  viewAttachmentSource(atts);

  // Mark up history along right hand edge
  var historyLink = document.querySelector("link[title='Bug Activity']");
  if (!historyLink)
    return;

  // Add our own style for bugzilla-tweaks
  var style = document.createElement("style");
  style.setAttribute("type", "text/css");
  style.appendChild(document.createTextNode(
      ".bztw_history { border: none; font-weight: normal; width: 58em; margin-left: 5em; }" +
      ".bztw_inlinehistory { font-weight: normal; width: 56em; }" +
      ".bztw_history .old, .bztw_inlinehistory .old { text-decoration: line-through; }" +
      ".bztw_history .sep:before { content: \" \"; }" +
      ".bztw_unconfirmed { font-style: italic; }" +
      "tr.bz_tr_obsolete.bztw_plusflag { display: table-row !important; }" +
      '.bztw_historyitem + .bztw_historyitem:before { content: "; "; }'
  ));
  document.getElementsByTagName("head")[0].appendChild(style);
  style = document.createElement("style");
  style.setAttribute("type", "text/css");
  style.id = "bztw_cc";
  style.appendChild(document.createTextNode(
      ".bztw_cc { display: none; }" +
      '.bztw_historyitem.bztw_cc + .bztw_historyitem:before { content: ""; }' +
      '.bztw_historyitem:not([class~="bztw_cc"]) ~ .bztw_historyitem.bztw_cc + .bztw_historyitem:before { content: "; "; }'
  ));
  document.getElementsByTagName("head")[0].appendChild(style);

  // collect the flag names
  var flagNames = [], flags = {}, flagOccurrences = {};
  var flagRows = document.querySelectorAll("#flags tr");
  for (var i = 0; i < flagRows.length; ++i) {
    var item = flagRows[i].querySelectorAll("td");
    if (!item[1])
      continue;
    var name = trimContent(item[1]).replace('\u2011', '-', 'g');
    flagNames.push(name);
    flags[name] = item[1];
  }
  flagRows = document.querySelectorAll(".field_label[id^=field_label_cf_]");
  for (var i = 0; i < flagRows.length; ++i) {
    var name = trimContent(flagRows[i]).replace(/\:$/, '')
    .replace('\u2011', '-', 'g');
    flagNames.push(name);
    flags[name] = flagRows[i];
  }
  var flagCounter = 1;

  // =================================================
  function findFlag(item) {
    function lookup(name) {
      name = name.replace('\u2011', '-', 'g');
      for (var i = 0; i < flagNames.length; ++i) {
        var quotedFlagName = flagNames[i].replace('.', '\\.', 'g')
        .replace('\u2011', '-', 'g');
        if ((new RegExp('^' + quotedFlagName)).test(name)) {
          return [flagNames[i]];
        }
      }
      return [];
    }
    var base = item[4] ? 2 : 0;
    // handle normal flags
    if (trimContent(item[base]) == 'Flag') {
      var result = [];
      var tmp = lookup(trimContent(item[base + 1]));
      if (tmp.length) {
        result.push(tmp[0]);
      }
      tmp = lookup(trimContent(item[base + 2]));
      if (tmp.length) {
        result.push(tmp[0]);
      }
      return result;
    }
    // handle special pseudo-flags
    return lookup(trimContent(item[base]));
  }

  var DataStore = new DataStoreCtor();

  var AttachmentFlagHandler = new AttachmentFlagHandlerCtor();
  AttachmentFlagHandler.determineInterestingFlags();

  var CheckinComment = new CheckinCommentCtor();
  CheckinComment.initialize(AttachmentFlagHandler._interestingFlags);

  if (document.location.hostname in cData.XMLRPCData) {
    var XMLRPCUrl = cData.XMLRPCData[document.location.hostname].url;
    collectHistory(XMLRPCUrl);
  }

  tbplbotSpamCollapser();
}

// ===================================================
function processHistory(history) {
  // FIXME Remove remaining code to special function ... callback
//  preprocessDuplicateMarkers(document, iframe.contentDocument);

/*
This is an example of the history we get:
{
    "version": "1.1",
    "result": {
        "bugs": [
            {
                "history": [
                    {
                        "when": "2011-04-04T00:19:04Z",
                        "who": "cebbert@redhat.com",
                        "changes": [
                            {
                                "removed": "",
                                "added": "xgl-maint@redhat.com",
                                "field_name": "cc",
                                "field": "CC"
                            },
                            {
                                "removed": "kernel",
                                "added": "xorg-x11-drv-ati",
                                "field_name": "component",
                                "field": "Component"
                            },
                            {
                                "removed": "kernel-maint@redhat.com",
                                "added": "xgl-maint@redhat.com",
                                "field_name": "assigned_to",
                                "field": "AssignedTo"
                            }
                        ]
                    },
                    {
                        "when": "2011-04-12T22:48:22Z",
                        "who": "mcepl@redhat.com",
                        "changes": [
                            {
                                "attachment_id": 488889,
                                "removed": "application/octet-stream",
                                "added": "text/plain",
                                "field_name": "attachments.mimetype",
                                "field": "Attachment mime type"
                            }
                        ]
                    },
                    {
                        "when": "2011-04-13T17:07:04Z",
                        "who": "mcepl@redhat.com",
                        "changes": [
                            {
                                "removed": "",
                                "added": "needinfo?(suckfish@ihug.co.nz)",
                                "field_name": "flagtypes.name",
                                "field": "Flags"
                            }
                        ]
                    },
                    {
                        "when": "2011-04-21T12:17:33Z",
                        "who": "mcepl@redhat.com",
                        "changes": [
                            {
                                "removed": "xgl-maint@redhat.com",
                                "added": "jglisse@redhat.com",
                                "field_name": "assigned_to",
                                "field": "AssignedTo"
                            }
                        ]
                    },
                    {
                        "when": "2011-04-28T22:53:58Z",
                        "who": "mcepl@redhat.com",
                        "changes": [
                            {
                                "attachment_id": 488889,
                                "removed": "text/plain",
                                "added": "application/octet-stream",
                                "field_name": "attachments.mimetype",
                                "field": "Attachment mime type"
                            }
                        ]
                    },
                    {
                        "when": "2011-04-28T22:59:18Z",
                        "who": "mcepl@redhat.com",
                        "changes": [
                            {
                                "attachment_id": 488889,
                                "removed": "application/octet-stream",
                                "added": "text/plain",
                                "field_name": "attachments.mimetype",
                                "field": "Attachment mime type"
                            }
                        ]
                    }
                ],
                "id": 692250,
                "alias": [
                    
                ]
            }
        ],
        "faults": [
            
        ]
    }
}
 */

  // UserNameCache
  var userNameCache = {};
  function getUserName(email) {
    if (email in userNameCache) {
      return userNameCache[email];
    }
    var emailLink = document.querySelectorAll("a.email");
    for (var i = 0; i < emailLink.length; ++i) {
      if (emailLink[i].href == "mailto:" + email) {
        return userNameCache[email] = htmlEncode(trimContent(emailLink[i]));
      }
    }
    return email;
  }

  if (history) {
//    console.log("processHistory: history = " + history.toSource());
    return ;
  }

//  var historyItems = iframe.contentDocument.querySelectorAll('#bugzilla-body tr');
//  var cmtTimes = document.querySelectorAll('.bz_comment_time');

  // Sometimes the history will stack several changes together,
  // and we'll want to append the data from the Nth item to the
  // div created in N-1
  var i=0, j=0, flagsFound;
  if (history) {
    Array.forEach(history, function (item) {
        processHistoryItem(cmtTimes, item);
    });
  }
  
  handleEmptyCollapsedBoxes(document);

//  // Set the latest flag links if necessary
//  for (var flagName in flagOccurrences) {
//    flags[flagName].innerHTML = '<a href="#' + flagOccurrences[flagName] + '">'
//    + flags[flagName].innerHTML + '</a>';
//  }

//  AttachmentFlagHandler.setupLinks(document);
  // END OF load event handler

}


function processHistoryItem(commentTimes, itemRaw) {
  var item = itemRaw.querySelectorAll("td");
  if (!item[1])
    return;

  var reachedEnd = false;
  for (; j < commentTimes.length; j++) {
    if (trimContent(item[1]) > trimContent(commentTimes[j])) {
      if (j < commentTimes.length - 1) {
        return;
      } else {
        reachedEnd = true;
      }
    }

    var commentHead = commentTimes[j].parentNode;

    var mainUser = commentHead.querySelector(".bz_comment_user a.email")
    .href
    .substr(7);
    var user = trimContent(item[0]);
    var mainTime = trimContent(commentTimes[j]);
    var time = trimContent(item[1]);
    var inline = (mainUser == user && time == mainTime);

    var currentDiv = document.createElement("div");
    var userPrefix = '';
    if (inline) {
      // assume that the change was made by the same user
      commentHead.appendChild(currentDiv);
      currentDiv.setAttribute("class", "bztw_inlinehistory");
    } else {
      // the change was made by another user
      if (!reachedEnd) {
        var parentDiv = commentHead.parentNode;
        if (parentDiv.previousElementSibling &&
            parentDiv.previousElementSibling.className.indexOf("bztw_history") >= 0) {
          currentDiv = parentDiv.previousElementSibling;
        } else {
          parentDiv.parentNode.insertBefore(currentDiv, parentDiv);
        }
      } else {
        var parentDiv = commentHead.parentNode;
        if (parentDiv.nextElementSibling &&
            parentDiv.nextElementSibling.className.indexOf("bztw_history") >= 0) {
          currentDiv = parentDiv.nextElementSibling;
        } else {
          parentDiv.parentNode.appendChild(currentDiv);
        }
      }
      currentDiv.setAttribute("class", "bz_comment bztw_history");
      userPrefix += "<a class=\"email\" href=\"mailto:" +
      htmlEncode(trimContent(item[0])) + "\" title=\"" +
      htmlEncode(trimContent(item[1])) +"\">" +
      getUserName(trimContent(item[0])) + "</a>: ";
    }
    // check to see if this is a flag setting
    flagsFound = findFlag(item);
    for (var idx = 0; idx < flagsFound.length; ++idx) {
      var flag = flagsFound[idx];
      flagOccurrences[flag] = 'flag' + flagCounter;
      if (inline) {
        var anchor = document.createElement("a");
        anchor.setAttribute("name", "flag" + flagCounter);
        commentHead.insertBefore(anchor, commentHead.firstChild);
      } else {
        userPrefix += '<a name="flag' + flagCounter + '"></a>';
      }
      ++flagCounter;
    }

    var attachmentFlagAnchors = AttachmentFlagHandler.handleItem(user, item);
    if (inline) {
      for (var idx = 0; idx < attachmentFlagAnchors.length; ++idx) {
        var anchor = document.createElement("a");
        anchor.setAttribute("name", attachmentFlagAnchors[idx]);
        commentHead.insertBefore(anchor, commentHead.firstChild);
      }
    } else {
      userPrefix += attachmentFlagAnchors.map(function(name) '<a name="' + name + '"></a>').join("");
    }

    var ccOnly = (trimContent(item[2]) == 'CC');
    var ccPrefix = ccOnly ? '<span class="bztw_cc bztw_historyitem">' :
      '<span class="bztw_historyitem">',
      ccSuffix = '</span>';
    var html = userPrefix +
    ccPrefix +
    transformType(trimContent(item[2]), trimContent(item[3]),
        trimContent(item[4])) + ": " +
        formatTransition(trimContent(item[3]), trimContent(item[4]),
            trimContent(item[2]), iframe.contentDocument);

    var nextItemsCount = item[0].rowSpan;
    for (var k = 1; k < nextItemsCount; ++k) {
      ccOnly = false;
      item = historyItems[++i].querySelectorAll("td")
      ccPrefix = (trimContent(item[0]) == 'CC') ?
          '<span class="bztw_cc bztw_historyitem">' : '<span class="bztw_historyitem">';
      // avoid showing a trailing semicolon if the previous entry
      // wasn't a CC and this one is
      var prefix = ccSuffix + ccPrefix;
      // check to see if this is a flag setting
      flagsFound = findFlag(item);
      for (var idx = 0; idx < flagsFound.length; ++idx) {
        var flag = flagsFound[idx];
        flagOccurrences[flag] = 'flag' + flagCounter;
        if (inline) {
          var anchor = document.createElement("a");
          anchor.setAttribute("name", "flag" + flagCounter);
          commentHead.insertBefore(anchor, commentHead.firstChild);
        } else {
          prefix += '<a name="flag' + flagCounter + '"></a>';
        }
        ++flagCounter;
      }

      var attachmentFlagAnchors = AttachmentFlagHandler.handleItem(user, item);
      if (inline) {
        for (var idx = 0; idx < attachmentFlagAnchors.length; ++idx) {
          var anchor = document.createElement("a");
          anchor.setAttribute("name", attachmentFlagAnchors[idx]);
          commentHead.insertBefore(anchor, commentHead.firstChild);
        }
      } else {
        prefix += attachmentFlagAnchors.map(function(name) '<a name="' + name + '"></a>').join("");
      }

      html += prefix +
      transformType(trimContent(item[0]), trimContent(item[1]),
          trimContent(item[2])) + ": " +
          formatTransition(trimContent(item[1]), trimContent(item[2]),
              trimContent(item[0]), iframe.contentDocument);
    }
    html += ccSuffix;
    if (ccOnly) {
      html = '<div class="bztw_cc">' + html + '</div>';
    } else {
      html = '<div>' + html + '</div>';
    }
    currentDiv.innerHTML += html;
    break;
  }
}

// ===================================================
var TransformValues = {
    linkifyURLs: function (str) {
      return str.replace(/((https?|ftp)\:\/\/[\S]+)/g, '<a href="$1">$1</a>');
    },
    linkifyBugAndCommentNumbers: function (str) {
      return str.replace(/(bug )(\d+) (comment )(\d+)/gi, '<a href="show_bug.cgi?id=$2#c$4">$1\n$2 $3\n$4</a>');
    },
    linkifyCommentNumbers: function (str) {
      return str.replace(/(comment (\d+))/gi, '<a href="#c$2">$1</a>');
    },
    linkifyBugNumbers: function (str) {
      return str.replace(/(bug (\d+))/gi, '<a href="show_bug.cgi?id=$2">$1</a>');
    },
    linkifyDependencies: function (str, type, histDoc) {
      switch (type) {
      case "Blocks":
      case "Depends on":
      case "Duplicate":
        str = str.replace(/\d+/g, function(str) {
          var link = histDoc.querySelector("a[href='show_bug.cgi?id=" + str + "']");
          if (link) {
            var class_ = '';
            if (/bz_closed/i.test(link.className)) {
              class_ += 'bz_closed ';
            } else if (/bztw_unconfirmed/i.test(link.className)) {
              class_ += 'bztw_unconfirmed ';
            }
            var parent = link.parentNode;
            if (parent) {
              if (parent.tagName.toLowerCase() == "i") {
                class_ += 'bztw_unconfirmed ';
              }
              if (/bz_closed/i.test(parent.className)) {
                class_ += 'bz_closed ';
              }
            }
            str = applyClass(class_,
                '<a title="' + htmlEncode(link.title) + '" href="show_bug.cgi?id=' + htmlEncode(str) + '"' +
                (link.hasAttribute("name") ? (' name="' + htmlEncode(link.getAttribute("name")) + '"') : '') +
                '>' + htmlEncode(str) + '</a>');
          }
          return str;
        });
      }
      return str;
    }
};

// ===============================================================================

function transform(str, type, histDoc) {
  for (var funcname in TransformValues) {
    var func = TransformValues[funcname];
    str = func.call(null, str, type, histDoc);
  }
  return str
}

var TransformTypes = {
    linkifyAttachments: function (str) {
      return str.replace(/(Attachment #(\d+))/g, function (str, x, id) {
        var link = document.querySelector("a[href='attachment.cgi?id=" + id + "']");
        if (link) {
          var class_ = '';
          if (/bz_obsolete/i.test(link.className)) {
            class_ += 'bz_obsolete ';
          }
          var parent = link.parentNode;
          if (parent && /bz_obsolete/i.test(parent.className)) {
            class_ += 'bz_obsolete ';
          }
          if (link.querySelector(".bz_obsolete")) {
            class_ += 'bz_obsolete ';
          }
          str = applyClass(class_,
              '<a title="' + htmlEncode(trimContent(link)) + '" href="attachment.cgi?id=' +
              htmlEncode(id) + '&action=edit">' + htmlEncode(str) + '</a>');
        }
        return str;
      });
    },
    changeDependencyLinkTitles: function (str, old, new_) {
      switch (str) {
      case "Blocks":
      case "Depends on":
        if (old.length && !new_.length) { // if the dependency was removed
          str = "No longer " + str[0].toLowerCase() + str.substr(1);
        }
        break;
      }
      return str;
    }
};

// =======================================================================

function transformType(str, old, new_) {
  for (var funcname in TransformTypes) {
    var func = TransformTypes[funcname];
    str = func.call(null, str, old, new_);
  }
  return str;
}

// new is a keyword, which makes this function uglier than I'd like
function formatTransition(old, new_, type, histDoc) {
  if (old.length) {
    old = transform(htmlEncode(old), type, histDoc);
    var setOldStyle = true;
    switch (type) {
    case "Blocks":
    case "Depends on":
      setOldStyle = false;
      break;
    }
    if (setOldStyle) {
      old = '<span class="old">' + old + '</span>';
    }
  }
  if (new_.length) {
    new_ = '<span class="new">' + transform(htmlEncode(new_), type, histDoc) + '</span>';
  }
  var mid = '';
  if (old.length && new_.length) {
    mid = ' <span style="font-size: 150%;">&rArr;</span> ';
  }
  return old + mid + new_;
}

// =========================================================================

function trimContent(el) {
  return el.textContent.trim();
}

function AttachmentFlag(flag) {
  for (var name in flag)
    this[name] = flag[name];
}
AttachmentFlag.prototype = {
    equals: function(flag) {
      if (this.type != flag.type ||
          this.name != flag.name ||
          this.setter != flag.setter ||
          ("requestee" in this && !("requestee" in flag)) ||
          ("requestee" in flag && !("requestee" in this)))
        return false;
      return this.requestee == flag.requestee;
    }
};

var reAttachmentDiff = /attachment\.cgi\?id=(\d+)&action=diff$/i;
var reviewBoardUrlBase = "http://reviews.visophyte.org/";

// ===============================================================================

function AttachmentFlagHandlerCtor() {
  this._db = {};
  this._interestingFlags = {};
}
AttachmentFlagHandlerCtor.prototype = {
    determineInterestingFlags: function () {
      var table = document.getElementById("attachment_table");
      if (!table)
        return;
      var rows = table.querySelectorAll("tr");
      for (var i = 0; i < rows.length; ++i) {
        var item = rows[i].querySelectorAll("td");
        if (item.length != 3 ||
            item[1].className.indexOf("bz_attach_flags") < 0 ||
            trimContent(item[1]) == "no flags")
          continue;
        // get the ID of the attachment
        var link = item[0].querySelector("a");
        if (!link)
          continue;
        var match = this._reAttachmentHref.exec(link.href);
        if (match) {
          var attachmentID = match[1];
          if (!(attachmentID in this._interestingFlags)) {
            this._interestingFlags[attachmentID] = [];
          }
          for (var el = item[1].firstChild; el.nextSibling; el = el.nextSibling) {
            if (el.nodeType != el.TEXT_NODE)
              continue;
            var text = trimContent(el).replace('\u2011', '-', 'g');
            if (!text)
              continue;
            match = this._reParseInterestingFlag.exec(text);
            if (match) {
              var flag = {};
              flag.setter = match[1];
              flag.name = match[2];
              if (match[4] == "+" || match[4] == "-") {
                flag.type = match[4];
              } else {
                flag.type = "?";
                if (match[7]) {
                  flag.requestee = match[7];
                }
              }

              // always show the obsolete attachments with a + flag
              if (flag.type == "+") {
                var parent = link.parentNode;
                while (parent) {
                  if (parent.tagName.toLowerCase() == "tr") {
                    if (/bz_tr_obsolete/i.test(parent.className)) {
                      parent.className += " bztw_plusflag";
                    }
                    break;
                  }
                  parent = parent.parentNode;
                }
              }

              // try to put the flag name and type part in a span
              // which we will
              // use in setupLinks to inject links into.
              match = this._reLinkifyInterestingFlag.exec(text);
              if (match) {
                el.textContent = match[1];
                if (match[3]) {
                  var textNode = document.createTextNode(match[3]);
                  el.parentNode.insertBefore(textNode, el.nextSibling);
                }
                var span = document.createElement("span");
                span.textContent = match[2];
                el.parentNode.insertBefore(span, el.nextSibling);

                flag.placeholder = span;
              }

              this._interestingFlags[attachmentID].push(new AttachmentFlag(flag));
            }
          }
        }
      }
    },
    handleItem: function (name, item) {
      var anchorsCreated = [];
      var base = item[4] ? 2 : 0;
      var what = trimContent(item[base]);
      var match = this._reAttachmentFlagName.exec(what);
      if (match) {
        var id = match[1];
        if (!(id in this._db)) {
          this._db[id] = [];
        }
        name = name.split('@')[0]; // convert the name to the fraction
        // before the @
        var added = this._parseData(name, trimContent(item[base + 2]));
        for (var i = 0; i < added.length; ++i) {
          var flag = added[i];
          if (!(id in this._interestingFlags))
            continue;
          for (var j = 0; j < this._interestingFlags[id].length; ++j) {
            if (flag.equals(this._interestingFlags[id][j])) {
              // found an interesting flag
              this._interestingFlags[id][j].anchor = this.anchorName;
              anchorsCreated.push(this.anchorName);
              this._counter++;
              break;
            }
          }
        }
      }
      return anchorsCreated;
    },
    setupLinks: function () {
      for (var id in this._interestingFlags) {
        for (var i = 0; i < this._interestingFlags[id].length; ++i) {
          var flag = this._interestingFlags[id][i];
          if ("placeholder" in flag &&
              "anchor" in flag) {
            var link = document.createElement("a");
            link.href = "#" + flag.anchor;
            link.textContent = flag.placeholder.textContent;
            flag.placeholder.replaceChild(link, flag.placeholder.firstChild);
          }
        }
      }
    },
    _parseData: function (name, str) {
      var items = str.replace('\u2011', '-', 'g').split(', '), flags = [];
      for (var i = 0; i < items.length; ++i) {
        if (!items[i].length)
          continue;

        var match = this._reParseRequest.exec(items[i]);
        if (match) {
          var flag = {};
          flag.name = match[1];
          flag.setter = name;
          if (match[4]) {
            flag.requestee = match[4];
          }
          flag.type = match[2];
          flags.push(new AttachmentFlag(flag));
        }
      }
      return flags;
    },
    _counter: 1,
    get anchorName() {
      return "attachflag" + this._counter;
    },
    _reParseRequest: /^(.+)([\?\-\+])(\((.+)@.+\))?$/,
    _reParseInterestingFlag: /^(.+):\s+(.+)(([\-\+])|\?(\s+(\((.+)\)))?)$/,
    _reLinkifyInterestingFlag: /^(.+:\s+)(.+[\-\+\?])(\s+\(.+\))?$/,
    _reAttachmentHref: /attachment\.cgi\?id=(\d+)$/i,
    _reAttachmentFlagName: /^Attachment\s+#(\d+)\s+Flags$/i
};

function CheckinCommentCtor() {
  this.bugNumber = null;
  this.summarySpan = null;
  this.checkinFlags = "";
}
CheckinCommentCtor.prototype = {
    initialize: function(flags) {
      this.bugNumber = getBugNo();
      var summarySpan = document.getElementById("short_desc_nonedit_display");
      if (summarySpan) {
        this.summary = summarySpan.textContent;
      }
      var checkinFlagsMap = {};
      for (var id in flags) {
        for (var i = 0; i < flags[id].length; ++i) {
          var flag = flags[id][i];
          if (flag.type == "+") {
            var name = flag.name;
            if (name == "review") {
              name = "r";
            } else if (name == "superreview") {
              name = "sr";
            } else if (name == "ui-review") {
              name = "ui-r";
            } else if (name == "feedback") {
              name = "f";
            }
            if (!(name in checkinFlagsMap)) {
              checkinFlagsMap[name] = {};
            }
            checkinFlagsMap[name][flag.setter]++;
          }
        }
      }
      var flagsOrdered = [];
      for (var name in checkinFlagsMap) {
        flagsOrdered.push(name);
      }
      flagsOrdered.sort(function (a, b) {
        function convertToNumber(x) {
          switch (x) {
          case "f":
            return -4;
          case "r":
            return -3;
          case "sr":
            return -2;
          case "ui-r":
            return -1;
          default:
            return 0;
          }
        }
        var an = convertToNumber(a);
        var bn = convertToNumber(b);
        if (an == 0 && bn == 0) {
          return a < b ? -1 : (a = b ? 0 : 1);
        } else {
          return an - bn;
        }
      });
      var checkinFlags = [];
      for (var i = 0; i < flagsOrdered.length; ++i) {
        var name = flagsOrdered[i];
        var flag = name + "=";
        var setters = [];
        for (var setter in checkinFlagsMap[name]) {
          setters.push(setter);
        }
        flag += setters.join(",");
        checkinFlags.push(flag);
      }
      this.checkinFlags = checkinFlags.join(" ");
      if (this.isValid()) {
        var div = document.createElement("div");
        div.setAttribute("style", "display: none;");
        div.id = "__bz_tw_checkin_comment";
        div.appendChild(document.createTextNode(this.toString()));
        document.body.appendChild(div);
      }
    },
    isValid: function() {
      return this.bugNumber != null &&
      this.summary != null;
    },
    toString: function() {
      if (!this.isValid()) {
        return "";
      }
      var message = "Bug " + this.bugNumber + " - " + this.summary;
      if (this.checkinFlags.length) {
        message += "; " + this.checkinFlags;
      }
      return message;
    }
};

function DataStoreCtor() {
  this.storage = document.defaultView.localStorage;
  this.data = {};
  this.bugNumber = null;
  function visualizeStoredData() {
    var data = "";
    for (var i = 0; i < window.localStorage.length; ++i) {
      var key = window.localStorage.key(i);
      data += key + ": " + JSON.parse(window.localStorage.getItem(key).toString()).toSource() + "\n";
    }
    open("data:text/html,<pre>" + escape(htmlEncode(data)) + "</pre>");
  }
  function clearStoredData() {
    var count = window.localStorage.length;
    if (count > 0) {
      if (window.confirm("You currently have data stored for " + count + " bugs.\n\n" +
      "Are you sure you want to clear this data?  This action cannot be undone.")) {
        window.localStorage.clear();
      }
    } else {
      alert("You don't have any data stored about your bugs");
    }
  }
  var script = document.createElement("script");
  script.appendChild(document.createTextNode(visualizeStoredData.toSource() +
      clearStoredData.toSource() +
      htmlEncode.toSource()));
  document.body.appendChild(script);
  this.initialize();
}

DataStoreCtor.prototype = {
    initialize: function() {
      this.bugNumber = getBugNo();
      var data = this._ensureEntry(this.bugNumber, this.data);
      // last visited date
      data.visitedTime = (new Date()).getTime();
      // last comment count
      data.commentCount = document.querySelectorAll(".bz_comment").length;
      // last status of bug flags
      var flags = this._ensureEntry("flags", data);
      var flagRows = document.querySelectorAll("#flags tr");
      for (var i = 0; i < flagRows.length; ++i) {
        var flagCols = flagRows[i].querySelectorAll("td");
        if (flagCols.length != 3) {
          continue;
        }
        var flagName = trimContent(flagCols[1]);
        var flagValue = flagCols[2].querySelector("select");
        if (flagValue) {
          flagValue = flagValue.value;
        } else {
          continue;
        }
        flags[flagName] = flagValue;
      }
      flagRows = document.querySelectorAll(".field_label[id^=field_label_cf_]");
      for (var i = 0; i < flagRows.length; ++i) {
        var flagName = trimContent(flagRows[i]).replace(/:$/, "");
        var flagValue = flagRows[i].parentNode.querySelector("select");
        if (flagValue) {
          flagValue = flagValue.value;
        } else {
          continue;
        }
        flags[flagName] = flagValue;
      }
      // last attachments
      var attachmentTable = document.getElementById("attachment_table");
      var attachmentRows = attachmentTable.querySelectorAll("tr");
      for (var i = 0; i < attachmentRows.length; ++i) {
        var attachmentCells = attachmentRows[i].querySelectorAll("td");
        if (attachmentCells.length != 3) {
          continue;
        }
        var link = attachmentCells[0].querySelector("a");
        var match = this._reAttachmentHref.exec(link.href);
        if (match) {
          var attachmentID = match[1];
          var attachment = this._ensureEntry("attachments", data);
          var attachmentFlags = this._ensureArray(attachmentID, attachment);
          for (var el = attachmentCells[1].firstChild; el.nextSibling; el = el.nextSibling) {
            if (el.nodeType != el.TEXT_NODE) {
              continue;
            }
            var text = trimContent(el);
            if (!text) {
              continue;
            }
            match = this._reParseInterestingFlag.exec(text);
            if (match) {
              var flag = {};
              flag.setter = match[1];
              flag.name = match[2];
              if (match[4] == "+" || match[4] == "-") {
                flag.type = match[4];
              } else {
                flag.type = "?";
                if (match[7]) {
                  flag.requestee = match[7];
                }
              }
              attachmentFlags.push(flag);
            }
          }
        }
      }
      // Write data to storage
      for (var key in this.data) {
        this._ensure(key, this.storage, JSON.stringify(this.data[key]));
      }
    },
    _ensure: function(entry, obj, val) {
      if (obj.toString().indexOf("[object Storage") >= 0) {
        obj.setItem(entry, val);
      } else {
        if (typeof obj[entry] == "undefined")
          obj[entry]  = val;
        return obj[entry];
      }
    },
    _ensureEntry: function(entry, obj) {
      return this._ensure(entry, obj, {});
    },
    _ensureArray: function(entry, obj) {
      return this._ensure(entry, obj, []);
    },
    _reParseInterestingFlag: /^(.+):\s+(.+)(([\-\+])|\?(\s+(\((.+)\)))?)$/,
    _reAttachmentHref: /attachment\.cgi\?id=(\d+)$/i
};


function handleEmptyCollapsedBoxes() {
  // first, try to get the display style of a CC field (any would do)
  var historyBoxes = document.querySelectorAll(".bztw_history");
  for (var i = 0; i < historyBoxes.length; ++i) {
    var box = historyBoxes[i];
    for (var j = 0; j < box.childNodes.length; ++j) {
      var child = box.childNodes[j], found = true;
      if (child.nodeType != child.ELEMENT_NODE)
        continue;
      if (child.className == "sep") {
        // separators are insignificant
        continue;
      } else if (!/bztw_cc/.test(child.className)) {
        found = false;
        break;
      }
    }
    if (found) {
      box.className += " bztw_cc";
    }
  }
}

function applyClass(class_, html) {
  return '<span class="' + class_ + '">' + html + '</span>';
}

function htmlEncode(str) {
  return str.replace('&', '&amp;', 'g')
  .replace('<', '&lt;', 'g')
  .replace('>', '&gt;', 'g')
  .replace('"', '&quot;', 'g');
}

function tbplbotSpamCollapser() {
  var collapseExpandBox = document.querySelector(".bz_collapse_expand_comments");
  if (!collapseExpandBox) {
    return;
  }
  var a = document.createElement("a");
  a.href = "#";
  a.addEventListener("click", function(e) {
    e.preventDefault();
    var win = document.defaultView.wrappedJSObject;
    var comments = document.querySelectorAll(".bz_comment");
    for (var i = 0; i < comments.length; ++i) {
      var comment = comments[i];
      try {
        if (comment.querySelector(".bz_comment_user a.email").href.substr(7) ==
        "tbplbot@gmail.com") {
          win.collapse_comment(comment.querySelector(".bz_collapse_comment"),
              comment.querySelector(".bz_comment_text"));
        }
      } catch (e) {
        continue;
      }
    }
    return false;
  }, false);
  a.appendChild(document.createTextNode("Collapse All tbplbot Comments"));
  var li = document.createElement("li");
  li.appendChild(a);
  collapseExpandBox.appendChild(li);
}