Flickr Original Link user script

// ==UserScript==
// @name        Flickr Original Link
// @namespace   https://greasyfork.org/scripts/1190-flickr-original-link
// @include   /flickr\.com/
// @version  5.1.0
// @grant       GM_getValue
// @grant       GM_setValue
// @require   http://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js
// @description  Show direct links to download biggest Flickr image available and some other sizes. 
// ==/UserScript==
var postfix = "_d.jpg";
var prefix = "DOWNLOAD ";
var isChecked_openLink = "";
var isChecked_alwaysShow = "";
var key_openLink = "flickr_openLink";
var key_alwaysShow = "flickr_alwaysShow";
var value_openLink = false;
var value_alwaysShow = false;
var imageSizeOrder = [ "o", "k", "h", "l", "c", "z" ];
var globalObserver = null;

function log(s) {
    console.log(s);
}

function getSetting() {
    value_openLink = GM_getValue(key_openLink, false);
    value_alwaysShow = GM_getValue(key_alwaysShow, false);
    if (value_openLink) {
  postfix = ".";
  isChecked_openLink = ' checked="checked" ';
  prefix = "OPEN ";
    }
    else {
  postfix = "_d.";
  isChecked_openLink = "";
  prefix = "DOWNLOAD ";
    }
    if (value_alwaysShow) {
  isChecked_alwaysShow = ' checked="checked" ';
    }
    else {
  isChecked_alwaysShow = "";
    }
}

function checkAlwaysShow() {
    if (value_alwaysShow) {
  $('div.interaction-view').css('opacity', '1');
    }
    $('div.interaction-bar').css('bottom', '1.1em');
}

function action_single_page() {
    if ($('.commonButton').length > 0) return false;
    var action = function(sourceCode) {
  var sizes = sourceCode.match(/modelExport: {.+?"sizes":{.+?}}/i);
  var mSize = sizes[0].match(/"width":"?\d+"?,"height":"?\d+"?,/ig);
  var mLink = sizes[0].match(/"displayUrl":"[^"]+"/ig);
  var length = mLink.length;
  for (var k = 0; k < length; k++) {
      mSize[k] = mSize[k].replace(/"width":(\d+),"height":(\d+),/i, "$1 x $2");
      mLink[k] = "http:" + mLink[k].replace(/"displayUrl":"([^"]+)"/i, "$1").replace(/\\/g, "").replace(/(_[a-z])\.([a-z]{3,4})/i, '$1' + postfix + '$2');
  }
  var insertLocation = $('.sub-photo-right-row1').filter(':first');
  var str = '<a class="commonButton bigButton" href="' + mLink[length - 1] + '">' + prefix + mSize[length - 1] + ' px</a>';
  for (k = length - 2; k > length - 6; --k) {
      str += '<a class="commonButton smallButton" href="' + mLink[k] + '">' + mSize[k] + ' px</a>';
  }
  insertLocation.html(insertLocation.html() + str);
    };
    $.get(document.URL, action);
}

function getLinkFromSource(data) {
    if (data === null) return;// source code is not loaded, or empty, or has nothing good
    var sizes = data.match(/"sizes":.+?}}/ig);
    if (sizes === null) return false; // source code is not loaded, or empty, or has nothing good
    var e2 = $('div.photo-list-photo-view');
    for (var index = 0; index < e2.length; index++) {
  var e = $(e2[index]);
  if (e.find('.myFuckingLink').filter(':first').length > 0) continue;
  e.html(e.html() + '<a class="myFuckingLink"></a>');
  for (var i = 0; i < imageSizeOrder.length; ++i) {
      var photo = sizes[index].match(new RegExp('"' + imageSizeOrder[i] + '":{"displayUrl":"([^"]+)","width":(\\d+),"height":(\\d+)', "i"));
      if (photo === null) continue;
      var b = e.find('.myFuckingLink');
      b.attr('href', "http:" + photo[1].replace(/\\/g, "").replace(/(_[a-z])\.([a-z]{3,4})/i, '$1' + postfix + '$2'));
      b.attr('title', prefix + photo[2] + " x " + photo[3]);
      b.html(prefix + photo[2] + " x " + photo[3]);
      break;
  }
    }
}

function action_normal_page() {
    var target = $('#content')[0];
    var config = {
  childList : true,
  subtree : true,
    };
    var prevUrl = "none";
    var prevThumbLength = 0;
    var sourceCode = null;

    var action = function() {
  var e3 = $('div.photo-list-photo-view');
  if (document.URL == prevUrl) {
      if (e3.length == prevThumbLength) return false; // number of thumbnail is not change, no need to process further
      checkAlwaysShow();
      prevThumbLength = e3.length;
      log("Number of thumb: " + prevThumbLength);
      // source code is get, use it now
      getLinkFromSource(sourceCode);
  }
  else {
      var e1 = e3.find('a').filter(':first');
      if (e1.length < 1) return false; // not found any link to valid single image page
      checkAlwaysShow();
      // get full source code for this page
      sourceCode = null;
      prevUrl = document.URL;
      var link1 = e1.attr('href');
      console.time("GetSource");
      $('#content').append('<div id="loadingIndicator" style="position:fixed;left:5px;bottom:2em;display:block;background-color:pink;border:solid;padding:3px">Getting original link<br>Please wait...</div>');
      log("Begin get source 1: " + link1);
      $.get(link1, function(data) {// process single image page source to get entry-type link
    var link2 = data.match(/<a\s+class=.+?entry-type.+?href='([^']+)/i)[1];
    link2 = link2.replace("/albums/", "/sets/");
    log("Begin get source 2: " + link2);
    $.get(link2, function(data) {// process page source to get image links
        log("Got final source: " + link2);
        console.timeEnd("GetSource");
        $('#loadingIndicator').remove();
        sourceCode = data;
        getLinkFromSource(sourceCode);
    });
      });
  }
    }
    action();
    globalObserver = new MutationObserver(function(mutations, ob) {
  action();
    });
    globalObserver.observe(target, config);
}

function flickr_mouseenter() {
    var e = $(this);
    if (e.find('.myFuckingLink').filter(':first').length > 0) {
  e.off('mouseenter');
  return false;
    }
    var url = e.find('a').filter(':first').attr('href');
    if (typeof url == "undefined" || url === null) return false;
    e.append('<a class="myFuckingLink">(Link loading...)</a>');
    $.get(url, function(data) {
  var photo = data.match(/"displayUrl":"([^"]+)","width":(\d+),"height":(\d+)[^}]+}}/i);
  var link = "http:" + photo[1].replace(/\\/g, "").replace(/(_[a-z])\.([a-z]{3,4})/i, '$1' + postfix + '$2');
  var text = prefix + photo[2] + " x " + photo[3];
  var b = e.find('.myFuckingLink');
  b.attr('href', link);
  b.attr('title', text);
  b.html(text);
    });
}

function action_hover_page() {
    var target = $('body')[0];
    var config = {
  childList : true,
  subtree : true,
    };
    var prevLength = 0;
    globalObserver = new MutationObserver(function(mutations, ob) {
  var e = $('div.photo-list-photo-view');
  if (e.length == prevLength) return false; // no new Thumbnail, don't do anything
  log("Number of thumb: " + e.length);
  prevLength = e.length;
  checkAlwaysShow();
  e.mouseenter(flickr_mouseenter);
    });
    globalObserver.observe(target, config);
}

function pageType() {
    var t = "none";
    var htmlClass = $('html').attr('class');
    console.log("HTML class: " + htmlClass);
    if (htmlClass.match(/html-photo-page.+scrappy-view/i) !== null) t = 'single';
    // else if (htmlClass.match(/html-(search-photos-unified|photostream)-page-view/i) !== null) t = 'hover';
    else if (htmlClass.match(/html-(search-photos-unified|group-pool)-page-view/i) !== null) t = 'hover';
    else if ($('div.photo-list-photo-view').filter(':first').length > 0) t = 'normal';
    console.log("Page type: " + t);
    return t;
}

var prevType = "none";
var type = "none";
var oldUrl = "none";
var count = 0;

var target = $('html')[0];
var config = {
    childList : false,
    attributes : true,
};
var observer = new MutationObserver(
  function(mutations, ob) {
      if (oldUrl == document.URL) return;
      if (globalObserver !== null) globalObserver.disconnect();
      oldUrl = document.URL;
      type = pageType();
      getSetting();
      checkAlwaysShow();
      var strCss = ".myFuckingLink{position:absolute;z-index:999999;left:3px;bottom:0px;width:100%;display:block;color:white!important;} .myFuckingLink:hover{background-color:rgba(100, 100, 255,0.65)!important} .commonButton{display:inline-block;cursor:pointer;border-radius:1.5em;margin:0.3em;font-size:90%} .bigButton{border-width:2px;padding:1em;font-weight:bold;border-style:solid} .smallButton{padding:0.5em;background-color:pink}";
      $('head').append('<style>' + strCss + '</style>');
      $('.myOptionBox').remove();
      $('ul.nav-menu:first').append('<li class="myOptionBox"><div style="color:pink;padding:1px"><input id="optionbox_openLink" type="checkbox"' + isChecked_openLink + 'style="margin:2px"/>Open image link in browser<br><input id="optionbox_alwaysShow" type="checkbox"' + isChecked_alwaysShow + 'style="margin:2px"/>Always show image information in Photostream</div></li>');
      $('#optionbox_openLink').change(function() {
    GM_setValue(key_openLink, $(this).prop('checked'));
      });
      $('#optionbox_alwaysShow').change(function() {
    GM_setValue(key_alwaysShow, $(this).prop('checked'));
      });
      if (type == 'single') action_single_page();
      else if (type == 'normal') action_normal_page();
      else if (type == 'hover') action_hover_page();
  });
observer.observe(target, config);