ytcenter = ytcenter || {};
ytcenter.io = ytcenter.io || {};
(function(self, ytcenter){
  /* Blob.js
   * A Blob implementation.
   * 2013-06-20
   * 
   * By Eli Grey, http://eligrey.com
   * By Devin Samarin, https://github.com/eboyjr
   * License: X11/MIT
   *   See LICENSE.md
   */
  /*! @source http://purl.eligrey.com/github/Blob.js/blob/master/Blob.js */
  try {ytcenter.io.Blob = Blob;} catch (e) {}
  if (typeof Blob !== "function" || typeof URL === "undefined")
  if (typeof Blob === "function" && typeof webkitURL !== "undefined") self.URL = webkitURL;
  else ytcenter.io.Blob = (function (view) {
    "use strict";

    var BlobBuilder = (function(){
      var a = false;
      try {
        a = view.BlobBuilder || view.WebKitBlobBuilder || view.MozBlobBuilder || view.MSBlobBuilder;
      } catch (e) {
        try {
          a = view.WebKitBlobBuilder || view.MozBlobBuilder || view.MSBlobBuilder;
        } catch (e) {
          try {
            a = view.MozBlobBuilder || view.MSBlobBuilder;
          } catch (e) {
            try {
              a = view.MSBlobBuilder;
            } catch (e) {
            }
          }
        }
      }
      return a;
    })() || (function(view) {
      var
          get_class = function(object) {
          return Object.prototype.toString.call(object).match(/^\[object\s(.*)\]$/)[1];
        }
        , FakeBlobBuilder = function BlobBuilder() {
          this.data = [];
        }
        , FakeBlob = function(data, type, encoding) {
          this.data = data;
          this.size = data.length;
          this.type = type;
          this.encoding = encoding;
        }
        , FBB_proto = FakeBlobBuilder.prototype
        , FB_proto = FakeBlob.prototype
        , FileReaderSync = view.FileReaderSync
        , FileException = function(type) {
          this.code = this[this.name = type];
        }
        , file_ex_codes = (
            "NOT_FOUND_ERR SECURITY_ERR ABORT_ERR NOT_READABLE_ERR ENCODING_ERR "
          + "NO_MODIFICATION_ALLOWED_ERR INVALID_STATE_ERR SYNTAX_ERR"
        ).split(" ")
        , file_ex_code = file_ex_codes.length
        , real_URL = view.URL || view.webkitURL || view
        , real_create_object_URL = real_URL.createObjectURL
        , real_revoke_object_URL = real_URL.revokeObjectURL
        , URL = real_URL
        , btoa = view.btoa
        , atob = view.atob

        , ArrayBuffer = view.ArrayBuffer
        , Uint8Array = view.Uint8Array
      ;
      FakeBlob.fake = FB_proto.fake = true;
      while (file_ex_code--) {
        FileException.prototype[file_ex_codes[file_ex_code]] = file_ex_code + 1;
      }
      if (!real_URL.createObjectURL) {
        URL = view.URL = {};
      }
      URL.createObjectURL = function(blob) {
        var
            type = blob.type
          , data_URI_header
        ;
        if (type === null) {
          type = "application/octet-stream";
        }
        if (blob instanceof FakeBlob) {
          data_URI_header = "data:" + type;
          if (blob.encoding === "base64") {
            return data_URI_header + ";base64," + blob.data;
          } else if (blob.encoding === "URI") {
            return data_URI_header + "," + decodeURIComponent(blob.data);
          } if (btoa) {
            return data_URI_header + ";base64," + btoa(blob.data);
          } else {
            return data_URI_header + "," + encodeURIComponent(blob.data);
          }
        } else if (real_create_object_URL) {
          return real_create_object_URL.call(real_URL, blob);
        }
      };
      URL.revokeObjectURL = function(object_URL) {
        if (object_URL.substring(0, 5) !== "data:" && real_revoke_object_URL) {
          real_revoke_object_URL.call(real_URL, object_URL);
        }
      };
      FBB_proto.append = function(data/*, endings*/) {
        var bb = this.data;
        // decode data to a binary string
        if (Uint8Array && (data instanceof ArrayBuffer || data instanceof Uint8Array)) {
          var
              str = ""
            , buf = new Uint8Array(data)
            , i = 0
            , buf_len = buf.length
          ;
          for (; i < buf_len; i++) {
            str += String.fromCharCode(buf[i]);
          }
          bb.push(str);
        } else if (get_class(data) === "Blob" || get_class(data) === "File") {
          if (FileReaderSync) {
            var fr = new FileReaderSync;
            bb.push(fr.readAsBinaryString(data));
          } else {
            // async FileReader won't work as BlobBuilder is sync
            throw new FileException("NOT_READABLE_ERR");
          }
        } else if (data instanceof FakeBlob) {
          if (data.encoding === "base64" && atob) {
            bb.push(atob(data.data));
          } else if (data.encoding === "URI") {
            bb.push(decodeURIComponent(data.data));
          } else if (data.encoding === "raw") {
            bb.push(data.data);
          }
        } else {
          if (typeof data !== "string") {
            data += ""; // convert unsupported types to strings
          }
          // decode UTF-16 to binary string
          bb.push(unescape(encodeURIComponent(data)));
        }
      };
      FBB_proto.getBlob = function(type) {
        if (!arguments.length) {
          type = null;
        }
        return new FakeBlob(this.data.join(""), type, "raw");
      };
      FBB_proto.toString = function() {
        return "[object BlobBuilder]";
      };
      FB_proto.slice = function(start, end, type) {
        var args = arguments.length;
        if (args < 3) {
          type = null;
        }
        return new FakeBlob(
            this.data.slice(start, args > 1 ? end : this.data.length)
          , type
          , this.encoding
        );
      };
      FB_proto.toString = function() {
        return "[object Blob]";
      };
      return FakeBlobBuilder;
    }(view));

    return function(blobParts, options) {
      var type = options ? (options.type || "") : "";
      var builder = new BlobBuilder();
      if (blobParts) {
        for (var i = 0, len = blobParts.length; i < len; i++) {
          builder.append(blobParts[i]);
        }
      }
      return builder.getBlob(type);
    };
  }(self));

  /* FileSaver.js
  * A saveAs() FileSaver implementation.
  * 2013-01-23
  *
  * By Eli Grey, http://eligrey.com
  * License: X11/MIT
  *   See LICENSE.md
  */
  /*! @source http://purl.eligrey.com/github/FileSaver.js/blob/master/FileSaver.js */
  ytcenter.io.saveAs = (self && self.saveAs)
    || (navigator && navigator.msSaveOrOpenBlob && navigator.msSaveOrOpenBlob.bind(navigator))
    || (function(view) {
    "use strict";
    var
        doc = view.document
        // only get URL when necessary in case BlobBuilder.js hasn't overridden it yet
      , get_URL = function() {
        var a;
        try {
          a = view.URL || view.webkitURL || view;
        } catch (e) {
          try {
            a = view.URL || view.webkitURL || view;
          } catch (e) {
            try {
              a = view.webkitURL || view;
            } catch (e) {
              try {
                a = view;
              } catch (e) {
                
              }
            }
          }
        }
        return a;
      }
      , URL = get_URL()
      , save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a")
      , can_use_save_link =  !view.externalHost && "download" in save_link
      , click = function(node) {
        var event = doc.createEvent("MouseEvents");
        event.initMouseEvent(
          "click", true, false, view, 0, 0, 0, 0, 0
          , false, false, false, false, 0, null
        );
        node.dispatchEvent(event);
      }
      , webkit_req_fs = view.webkitRequestFileSystem
      , req_fs = view.requestFileSystem || webkit_req_fs || view.mozRequestFileSystem
      , throw_outside = function (ex) {
        (view.setImmediate || view.setTimeout)(function() {
          throw ex;
        }, 0);
      }
      , force_saveable_type = "application/octet-stream"
      , fs_min_size = 0
      , deletion_queue = []
      , process_deletion_queue = function() {
        var i = deletion_queue.length;
        while (i--) {
          var file = deletion_queue[i];
          if (typeof file === "string") { // file is an object URL
            URL.revokeObjectURL(file);
          } else { // file is a File
            file.remove();
          }
        }
        deletion_queue.length = 0; // clear queue
      }
      , dispatch = function(filesaver, event_types, event) {
        event_types = [].concat(event_types);
        var i = event_types.length;
        while (i--) {
          var listener = filesaver["on" + event_types[i]];
          if (typeof listener === "function") {
            try {
              listener.call(filesaver, event || filesaver);
            } catch (ex) {
              throw_outside(ex);
            }
          }
        }
      }
      , FileSaver = function(blob, name) {
        // First try a.download, then web filesystem, then object URLs
        var
            filesaver = this
          , type = blob.type
          , blob_changed = false
          , object_url
          , target_view
          , get_object_url = function() {
            var object_url = get_URL().createObjectURL(blob);
            deletion_queue.push(object_url);
            return object_url;
          }
          , dispatch_all = function() {
            dispatch(filesaver, "writestart progress write writeend".split(" "));
          }
          // on any filesys errors revert to saving with object URLs
          , fs_error = function() {
            // don't create more object URLs than needed
            if (blob_changed || !object_url) {
              object_url = get_object_url(blob);
            }
            if (target_view) {
              target_view.location.href = object_url;
            } else {
                          window.open(object_url, "_blank");
                      }
            filesaver.readyState = filesaver.DONE;
            dispatch_all();
          }
          , abortable = function(func) {
            return function() {
              if (filesaver.readyState !== filesaver.DONE) {
                return func.apply(this, arguments);
              }
            };
          }
          , create_if_not_found = {create: true, exclusive: false}
          , slice
        ;
        filesaver.readyState = filesaver.INIT;
        if (!name) {
          name = "download";
        }
        if (can_use_save_link) {
          object_url = get_object_url(blob);
          save_link.href = object_url;
          save_link.download = name;
          click(save_link);
          filesaver.readyState = filesaver.DONE;
          dispatch_all();
          return;
        }
        // Object and web filesystem URLs have a problem saving in Google Chrome when
        // viewed in a tab, so I force save with application/octet-stream
        // http://code.google.com/p/chromium/issues/detail?id=91158
        if (view.chrome && type && type !== force_saveable_type) {
          slice = blob.slice || blob.webkitSlice;
          blob = slice.call(blob, 0, blob.size, force_saveable_type);
          blob_changed = true;
        }
        // Since I can't be sure that the guessed media type will trigger a download
        // in WebKit, I append .download to the filename.
        // https://bugs.webkit.org/show_bug.cgi?id=65440
        if (webkit_req_fs && name !== "download") {
          name += ".download";
        }
        if (type === force_saveable_type || webkit_req_fs) {
          target_view = view;
        }
        if (!req_fs) {
          fs_error();
          return;
        }
        fs_min_size += blob.size;
        req_fs(view.TEMPORARY, fs_min_size, abortable(function(fs) {
          fs.root.getDirectory("saved", create_if_not_found, abortable(function(dir) {
            var save = function() {
              dir.getFile(name, create_if_not_found, abortable(function(file) {
                file.createWriter(abortable(function(writer) {
                  writer.onwriteend = function(event) {
                    target_view.location.href = file.toURL();
                    deletion_queue.push(file);
                    filesaver.readyState = filesaver.DONE;
                    dispatch(filesaver, "writeend", event);
                  };
                  writer.onerror = function() {
                    var error = writer.error;
                    if (error.code !== error.ABORT_ERR) {
                      fs_error();
                    }
                  };
                  "writestart progress write abort".split(" ").forEach(function(event) {
                    writer["on" + event] = filesaver["on" + event];
                  });
                  writer.write(blob);
                  filesaver.abort = function() {
                    writer.abort();
                    filesaver.readyState = filesaver.DONE;
                  };
                  filesaver.readyState = filesaver.WRITING;
                }), fs_error);
              }), fs_error);
            };
            dir.getFile(name, {create: false}, abortable(function(file) {
              // delete file if it already exists
              file.remove();
              save();
            }), abortable(function(ex) {
              if (ex.code === ex.NOT_FOUND_ERR) {
                save();
              } else {
                fs_error();
              }
            }));
          }), fs_error);
        }), fs_error);
      }
      , FS_proto = FileSaver.prototype
      , saveAs = function(blob, name) {
        return new FileSaver(blob, name);
      }
    ;
    FS_proto.abort = function() {
      var filesaver = this;
      filesaver.readyState = filesaver.DONE;
      dispatch(filesaver, "abort");
    };
    FS_proto.readyState = FS_proto.INIT = 0;
    FS_proto.WRITING = 1;
    FS_proto.DONE = 2;

    FS_proto.error =
    FS_proto.onwritestart =
    FS_proto.onprogress =
    FS_proto.onwrite =
    FS_proto.onabort =
    FS_proto.onerror =
    FS_proto.onwriteend =
      null;

    view.addEventListener("unload", process_deletion_queue, false);
    return saveAs;
  }(self));
})(self, ytcenter);