// ==UserScript==
// @name        Stack Exchange Deleted Question Viewer
// @version     1.3
// @description Allows you to view some deleted questions on Stack Exchange.
// @namespace   http://jeremybanks.ca/
// @include     http://stackoverflow.com/questions/*
// @include     http://*.stackoverflow.com/questions/*
// @include     http://superuser.com/questions/*
// @include     http://*.superuser.com/questions/*
// @include     http://serverfault.com/questions/*
// @include     http://*.serverfault.com/questions/*
// @include     http://stackexchange.com/questions/*
// @include     http://*.stackexchange.com/questions/*
// @include     http://answers.onstartups.com/questions/*
// ==/UserScript==
;

var inject;
var __slice = Array.prototype.slice;

inject = function(f) {
  var script;
  script = document.createElement('script');
  script.textContent = "(" + f + ")();";
  return document.body.appendChild(script);
};

inject(function() {
  var DeferringThrottle, POST_TEMPLATE, answerFrame, commentsThrottle, continueWithjQuery, deletedPost, editPageThrottle, from, knownIds, markdownLoaded, myVotesThrottle, showAnswerIfNew, siteName, start, updateTitle, voteCountThrottle;
  start = function() {
    var script;
    if (!(location.pathname.match(/^\/questions\/\d+[\/$]/) && document.title.match(/^Page Not Found - /) && document.querySelector(".revision-comment"))) {
      return;
    }
    console.log('Deleted question detected, attempting to retrieve...');
    if (typeof $ !== "undefined" && $ !== null) {
      return continueWithjQuery();
    } else {
      script = document.createElement('script');
      script.src = 'http://ajax.googleapis.com/ajax/libs/jquery/1.5.2/jquery.min.js';
      script.addEventListener('load', continueWithjQuery);
      return document.body.appendChild(script);
    }
  };
  markdownLoaded = void 0;
  answerFrame = null;
  continueWithjQuery = function() {
    var m, question;
    markdownLoaded = $.ajax({
      dataType: 'script',
      cache: true,
      url: '/content/js/wmd.js'
    });
    question = deletedPost(location.pathname.match(/^\/questions\/(\d+)[\/$]/)[1]);
    knownIds[question.id] = true;
    updateTitle('[deleted]');
    $('.leftcol').remove();
    $('.rightcol').remove();
    $('#mainbar-full').append(question.element);
    if (m = location.hash.match(/^#(\d+)$/)) showAnswerIfNew(m[1]);
    return question.title.then(function(title) {
      return updateTitle("" + title + " [deleted]");
    });
  };
  knownIds = {};
  showAnswerIfNew = function(id) {
    var answer;
    if (!(String(id) in knownIds)) {
      knownIds[String(id)] = true;
      if (answerFrame == null) {
        answerFrame = $('<div id="answers">\n  <div id="answers-header">\n    <div class="subheader answers-subheader">\n      <h2>Known Answers</h2>\n    </div>\n  </div>\n</div>').appendTo($('#mainbar-full'));
      }
      answer = deletedPost(id);
      answerFrame.append(answer.element);
      return answer.element.addClass('answer');
    }
  };
  deletedPost = function(id) {
    var comments, editDoc, editPage, element, html, html_, myVotes, revisions, source, title, voteCounts;
    id = Number(id);
    editPage = editPageThrottle.throttle(function() {
      return $.ajax({
        dataType: 'text',
        cache: true,
        url: "/posts/" + id + "/edit"
      });
    });
    myVotes = myVotesThrottle.throttle(function() {
      return $.ajax({
        dataType: 'json',
        cache: true,
        url: "/posts/" + id + "/votes"
      });
    });
    comments = commentsThrottle.throttle(function() {
      return $.ajax({
        dataType: 'html',
        cache: true,
        url: "/posts/" + id + "/comments"
      });
    });
    voteCounts = voteCountThrottle.throttle(function() {
      return $.ajax({
        dataType: 'json',
        cache: true,
        url: "/posts/" + id + "/vote-counts"
      });
    });
    editDoc = from(editPage, function() {
      return $(this.split(/<!doctype [^>]+>/i)[1]);
    });
    title = from(editDoc, function() {
      return this.find("input[name=title]").val();
    });
    source = from(editDoc, function() {
      return $(this).find("textarea").val();
    });
    revisions = from(editDoc, function() {
      return this.find('#revisions-list option').map(function() {
        var comment, date, id_, isCurrent, name, _, _ref;
        _ref = $(this).text().match(/^(.*?) \((.*?)\)(?: (.+))?/), _ = _ref[0], name = _ref[1], date = _ref[2], comment = _ref[3];
        id_ = +$(this).attr('value');
        isCurrent = $(this).is(':selected');
        return {
          name: name,
          date: date,
          comment: comment,
          id: id_,
          isCurrent: isCurrent
        };
      });
    });
    html_ = new $.Deferred;
    source.then(function(s) {
      return markdownLoaded.then(function() {
        return html_.resolve((new Markdown.Converter).makeHtml(s));
      }, function() {
        return html_.reject();
      });
    }, function() {
      return html_.reject();
    });
    html = html_.promise();
    element = $(POST_TEMPLATE);
    source.then(function(sourcep) {
      element.find('.post-text').empty().append($('<pre></pre>').text(sourcep));
      return html.then(function(htmlp) {
        console.log('Displaying rendered HTML.');
        return element.find('.post-text').html(htmlp);
      });
    }, function() {
      return element.find('.post-text').html('<p><em>\n  This deleted post couldn\'t be retrieved.\n  This will occur if you have less than 500 reputation or the post has been locked.\n</em></p>');
    });
    voteCounts.then(function(_arg) {
      var down, up;
      up = _arg.up, down = _arg.down;
      element.find('.JB_upvotes').text(up);
      return element.find('.JB_downvotes').text(down);
    }, function() {
      element.find('.JB_upvotes').text('?');
      return element.find('.JB_downvotes').text('?');
    });
    myVotes.then(function(votes) {
      var vote, _i, _len;
      for (_i = 0, _len = votes.length; _i < _len; _i++) {
        vote = votes[_i];
        showAnswerIfNew(vote.PostId);
        if (vote.PostId === id) {
          switch (vote.VoteTypeId) {
            case 1:
              element.find('.JB_accepted').show();
              break;
            case 2:
              element.find('.JB_vote_up').removeClass('vote-up-off').addClass('vote-up-on');
              break;
            case 3:
              element.find('.JB_vote_down').removeClass('vote-down-off').addClass('vote-down-on');
              break;
            case 5:
              element.find('.JB_star').show().addClass('star-on');
          }
        }
      }
      return;
    });
    revisions.then(function(revisionsp) {
      var latest, original;
      latest = revisionsp[0];
      original = revisionsp[revisionsp.length - 1];
      element.find('.post-signature-owner .user-action-time').text('Posted ').append($('<strong></strong>').text(original.date));
      element.find('.post-signature-owner .user-details').text(original.name);
      if (latest !== original) {
        element.find('.post-signature .user-action-time').text('Edited ').append($('<strong></strong>').text(latest.date));
        return element.find('.post-signature .user-details').text(latest.name);
      } else {
        return element.find('.post-signature').remove();
      }
    }, function() {
      element.find('.post-signature-owner').remove();
      return element.find('.post-signature').remove();
    });
    comments.then(function(commentsp) {
      if (commentsp.length > 0) {
        return element.find('.comments').html(commentsp);
      } else {
        return element.find('.comments').remove();
      }
    });
    return {
      id: id,
      editPage: editPage,
      voteCounts: voteCounts,
      myVotes: myVotes,
      comments: comments,
      title: title,
      source: source,
      html: html,
      revisions: revisions,
      element: element
    };
  };
  siteName = $('title').text().match(/.* - (.+)$/)[1];
  from = function(promise, f) {
    var result;
    result = new $.Deferred;
    promise.then(function(x) {
      var filterResult;
      filterResult = f.call(x, x);
      if ((filterResult != null ? filterResult.length : void 0) !== 0) {
        return result.resolve(filterResult);
      } else {
        return result.reject('no elements selected');
      }
    }, function() {
      return result.reject();
    });
    return result.promise();
  };
  updateTitle = function(title) {
    $('title').text("" + title + " - " + siteName);
    return $('h1').text(title);
  };
  DeferringThrottle = (function() {

    function DeferringThrottle(interval, initialDelay) {
      this._queue = [];
      this.interval = interval;
      if (initialDelay != null) {
        this.last = (Number(new Date)) - (this.interval - initialDelay);
      } else {
        this.last = 0;
      }
      this.awake = false;
    }

    DeferringThrottle.prototype._process = function() {
      var now;
      var _this = this;
      if (this._queue.length > 0) {
        now = Number(new Date);
        if (now > this.last + this.interval) {
          this._resolve.apply(this, this._queue.shift());
          this.last = now;
        }
        return setTimeout(function() {
          return _this._process();
        }, this.last + this.interval - now);
      }
    };

    DeferringThrottle.prototype._resolve = function(deferred, f, args) {
      var secondaryValue;
      secondaryValue = f.apply(deferred, args);
      if (!(deferred.isResolved() || deferred.isRejected())) {
        $.when(secondaryValue).then((function() {
          return deferred.resolve.apply(deferred, arguments);
        }), (function() {
          return deferred.reject.apply(deferred, arguments);
        }));
      }
      return deferred;
    };

    DeferringThrottle.prototype.throttle = function() {
      var args, f, result;
      f = arguments[0], args = 2 <= arguments.length ? __slice.call(arguments, 1) : [];
      result = new $.Deferred;
      this._queue.push([result, f, args]);
      this._process();
      return result.promise();
    };

    return DeferringThrottle;

  })();
  editPageThrottle = new DeferringThrottle(700);
  commentsThrottle = new DeferringThrottle(500, 500);
  myVotesThrottle = new DeferringThrottle(5000, 1000);
  voteCountThrottle = new DeferringThrottle(1700);
  POST_TEMPLATE = '<div><table>\n<tr>\n  <td class="votecell"><div class="vote">\n    <span class="vote-up-off JB_vote_up"></span>\n    <span class="vote-count-post">\n      <div style="color: green;" class="JB_upvotes">\n        ...\n      </div>\n      <div class="vote-count-separator"></div>\n      <div style="color: maroon;" class="JB_downvotes">\n        ...\n      </div>\n    </span>\n    <span class="vote-down-off JB_vote_down"></span>\n    <span class="star-off JB_star" style="display: none;"></span>\n    <span class="vote-accepted-on JB_accepted" style="display: none;"></span>\n  </div></td>\n  <td class="postcell"><div>\n    <div class="post-text">\n      <p><em>Attempting to load deleted post...</em></p>\n    </div>\n    <div class="post-taglist"></div>\n    <table class="fw">\n      <tbody><tr>\n        <td class="vt" width="50%"><div class="post-menu"></div></td>\n        <td align="right" class="post-signature">\n          <div class="user-info">\n            <div class="user-action-time"></div>\n            <div class="user-details" style="color: black;"></div>\n          </div>\n        </td>\n        <td class="post-signature-owner">\n          <div class="user-info">\n            <div class="user-action-time"></div>\n            <div class="user-details" style="color: black;"></div>\n          </div>\n        </td>\n      </tr></tbody>\n    </table>\n  </div></td>\n</tr>\n<tr>\n  <td class="votecell"></td>\n  <td><div class="comments">\n    <em>Attempting to load comments...</em>\n  </div></td>\n</tr>\n</table></div>';
  return start();
});