nmbug.js

   1 var nmbug_server = 'http://localhost:5000';
   2
   3 nmbug = {
   4         show: function (message_id) {
   5                 this._get_tags(message_id, this._edit_tags.bind(this));
   6         },
   7         _get_tags: function (message_id, callback) {
   8                 var url = [
   9                         nmbug_server,
  10                         'mid',
  11                         encodeURIComponent(message_id),
  12                         ].join('/');
  13                 console.log('nmbug: get tags from ' + url);
  14                 var request = new XMLHttpRequest();
  15                 request.onload = function () {
  16                         if (this.status == 200) {
  17                                 var tags = JSON.parse(this.response);
  18                                 console.log('nmbug: got tags', tags);
  19                                 callback(message_id, tags);
  20                         } else {
  21                                 throw 'Error fetching ' + url + ' (status ' + this.status + ')';
  22                         }
  23                 };
  24                 request.open('get', url, true);
  25                 request.send();
  26         },
  27         _edit_tags: function (message_id, tags) {
  28                 var dialog = document.createElement('dialog');
  29
  30                 var content = document.createElement('p');
  31                 content.innerHTML = 'Edit tags for ' + message_id;
  32                 dialog.appendChild(content);
  33
  34                 var ul = document.createElement('ul');
  35                 dialog.appendChild(ul);
  36                 for (var i = 0; i < tags.length; i++) {
  37                         var li = document.createElement('li');
  38                         li.innerHTML = tags[i];
  39                         ul.appendChild(li);
  40                 }
  41                 var close = document.createElement('button');
  42                 close.innerHTML = 'Close';
  43                 close.onclick = function () {
  44                         dialog.close();
  45                 };
  46                 dialog.appendChild(close);
  47
  48                 document.body.appendChild(dialog);
  49
  50                 dialog.show();
  51         },
  52 };
  53
  54 var _gmane_handler = {
  55         regexp: /gmane[.]org/,
  56         handle: function (callback) {
  57                 var article = this._get_article();
  58                 this._get_message_id(article, callback);
  59         },
  60         _article_from_url: function (url) {
  61                 var regexp = new RegExp('http://article.gmane.org/([^/]+)/([0-9]+)');
  62                 var match = regexp.exec(url);
  63                 console.log('nmbug: get article from ' + url, match);
  64                 if (match) {
  65                         return {'group': match[1], 'id': parseInt(match[2])};
  66                 }
  67         },
  68         _get_article: function () {
  69                 var article = this._article_from_url(document.URL);
  70                 var i = 0;
  71                 for (var i = 0; !article && i < window.frames.length; i++) {
  72                         article = this._article_from_url(window.frames[i].document.URL);
  73                 }
  74                 if (!article) {
  75                         throw "Cannot extract an article from Gmane's " + document.URL;
  76                 }
  77                 return article;
  78         },
  79         _get_message_id: function (article, callback) {
  80                 var url = [
  81                         nmbug_server,
  82                         'gmane',
  83                         article.group,
  84                         article.id,
  85                 ].join('/');
  86                 console.log('nmbug: get Message-ID from ' + url);
  87                 var request = new XMLHttpRequest();
  88                 request.onload = function () {
  89                         var message_id = this.responseText;
  90                         callback(message_id);
  91                 };
  92                 request.open('get', url, true);
  93                 request.send();
  94         },
  95 };
  96
  97 var handlers = [
  98         _gmane_handler,
  99 ];
 100
 101 function _check_handler(handler) {
 102         var match = handler.regexp.test(document.URL);
 103         console.log('nmbug: testing', handler, match);
 104         if (match) {
 105                 console.log('nmbug: matched', handler);
 106                 handler.handle(nmbug.show.bind(nmbug));
 107         }
 108         return match;  /* break after the first match */
 109 }
 110
 111 function run() {
 112         var matched = handlers.some(_check_handler);
 113         if (!matched) {
 114                 throw 'No handler for ' + document.URL;
 115         }
 116 }