platforma/static/js/wiki/wikiapi.js

   1 (function($) {
   2
   3         $.wikiapi = {};
   4
   5         var noop = function() {};
   6         var noops = {'success': noop, 'failure': noop};
   7
   8         /*
   9          * Return absolute reverse path of given named view.
  10          * (at least he have it hard-coded in one place)
  11          *
  12          * TODO: think of a way, not to hard-code it here ;)
  13          *
  14          */
  15         function reverse() {
  16                 var vname = arguments[0];
  17
  18                 if(vname == "ajax_document_text") {
  19                         var path = "/" + arguments[1] + "/text";
  20                         if (arguments[2] !== undefined)
  21                                 path += "/" + arguments[2];
  22                         return path;
  23                 }
  24
  25                 if (vname == "ajax_document_history") {
  26                         return "/" + arguments[1] + "/history";
  27                 }
  28
  29                 if(vname == "ajax_document_diff")
  30                         return "/" + arguments[1] + "/diff/" + arguments[2] + "/" + arguments[3]
  31
  32                 console.log("Couldn't reverse match:", vname);
  33                 return "/404.html";
  34         };
  35
  36         /*
  37          * Document Abstraction
  38          */
  39         function WikiDocument(element_id) {
  40                 var meta = $('#'+element_id);
  41
  42                 this.id = meta.attr('data-document-name');
  43                 this.revision = $("*[data-key='revision']", meta).text();
  44                 this.gallery = $("*[data-key='gallery']", meta).text();
  45
  46                 this.text = null;
  47
  48                 this.has_local_changes = false;
  49                 this._lock = -1;
  50                 this._context_lock = -1;
  51                 this._lock_count = 0;
  52         }
  53
  54 //      WikiDocument.prototype.lock = function() {
  55 //              if(this._lock < 0) {
  56 //                      this._lock = Math.random();
  57 //                      this._context_lock = this._lock;
  58 //                      this._lock_count = 1;
  59 //                      return this._lock;
  60 //              }
  61 //
  62 //              // reentrant locks
  63 //              if(this._context_lock === this._lock) {
  64 //                      this._lock_count += 1;
  65 //                      return this._lock;
  66 //              }
  67 //
  68 //              throw "Document operation in progress. Try again later."
  69 //      };
  70 //
  71 //      WikiDocument.prototype.unlock = function(lockNumber) {
  72 //              if(this.locked === lockNumber) {
  73 //                      this._lock_count -= 1;
  74 //
  75 //                      if(this._lock_count === 0) {
  76 //                              this._lock = -1;
  77 //                              this._context_lock = -1;
  78 //                      };
  79 //                      return;
  80 //              }
  81 //              throw "Trying to unlock with wrong lockNumber";
  82 //      };
  83 //
  84 //      /*
  85 //       * About to leave context of current lock.
  86 //       */
  87 //      WikiDocument.prototype.leaveContext = function() {
  88 //              var old = this._context_lock;
  89 //              this._context_lock = -1;
  90 //              return old;
  91 //      };
  92
  93         /*
  94          * Fetch text of this document.
  95          */
  96         WikiDocument.prototype.fetch = function(params) {
  97                 params = $.extend({}, noops, params);
  98                 var self = this;
  99
 100                 $.ajax({
 101                         method: "GET",
 102                         url: reverse("ajax_document_text", self.id),
 103                         dataType: 'json',
 104                         success: function(data)
 105                         {
 106                                 var changed = false;
 107
 108                                 if (self.text === null || self.revision !== data.revision) {
 109                                         self.text = data.text;
 110                                         self.revision = data.revision;
 111                                         self.gallery = data.gallery;
 112                                         changed = true;
 113                                 }
 114
 115                                 self.has_local_changes = false;
 116                                 params['success'](self, changed);
 117                         },
 118                         error: function() {
 119                                 params['failure'](self, "Nie udało się wczytać treści dokumentu.");
 120                         }
 121                 });
 122         };
 123
 124         /*
 125          * Fetch history of this document.
 126          *
 127          * from - First revision to fetch (default = 0)
 128          * upto - Last revision to fetch (default = tip)
 129          *
 130          */
 131         WikiDocument.prototype.fetchHistory = function(params) {
 132                 /* this doesn't modify anything, so no locks */
 133                 params = $.extend({}, noops, params);
 134                 var self = this;
 135
 136                 $.ajax({
 137                         method: "GET",
 138                         url: reverse("ajax_document_history", self.id),
 139                         dataType: 'json',
 140                         data: {"from": params['from'], "upto": params['upto']},
 141                         success: function(data) {
 142                                 params['success'](self, data);
 143                         },
 144                         error: function() {
 145                                 params['failure'](self, "Nie udało się wczytać treści dokumentu.");
 146                         }
 147                 });
 148         };
 149
 150         /*
 151          * Set document's text
 152          */
 153         WikiDocument.prototype.setText = function(text) {
 154                 this.text = text;
 155                 this.has_local_changes = true;
 156         };
 157
 158         /*
 159          * Set document's gallery link
 160          */
 161         WikiDocument.prototype.setGallery = function(gallery) {
 162                 this.gallery = gallery;
 163                 this.has_local_changes = true;
 164         };
 165
 166         /*
 167          * Save text back to the server
 168          */
 169         WikiDocument.prototype.save = function(comment, success, failure){
 170                 var self = this;
 171
 172                 if (!self.has_local_changes) {
 173                         return success(self, "Nie ma zmian do zapisania.");
 174                 }
 175
 176                 /* you can't set text while some is fetching it (or saving) */
 177                 var metaComment = '<!--';
 178                 metaComment += '\n\tgallery:' + self.gallery;
 179                 metaComment += '\n-->'
 180
 181                 var data = {
 182                         name: self.id,
 183                         text: self.text,
 184                         parent_revision: self.revision,
 185                         comment: comment,
 186                 };
 187
 188                 $.ajax({
 189                         url: reverse("ajax_document_text", self.id),
 190                         type: "POST",
 191                         dataType: "json",
 192                         data: data,
 193                         success: function(data){
 194                                 var changed = false;
 195                                 if (data.text) {
 196                                         self.text = data.text;
 197                                         self.revision = data.revision;
 198                                         self.gallery = data.gallery;
 199                                         changed = true;
 200                                 }
 201                                 success(self, changed);
 202                         },
 203                         error: function(){
 204                                 failure(self, "Nie udało się zapisać.");
 205                         }
 206                 });
 207         }; /* end of save() */
 208
 209         $.wikiapi.WikiDocument = WikiDocument;
 210
 211 })(jQuery);