implemented favorites on post/show page

public/javascripts/src/app/comments.js

@@ -27,7 +27,6 @@
           body: $(e.target).closest("form").find("textarea").val()
         },
         success: function(data, text_status, xhr) {
-          console.log($(this).closest("div.new-comment").find("div.comment-preview"));
           $(this).closest("div.new-comment").find("div.comment-preview").show().html(data);
         },
         type: "post"

public/javascripts/src/app/favorites.js

@@ -0,0 +1,69 @@
+(function() {
+  Danbooru.Favorite = {};
+  
+  Danbooru.Favorite.initialize_all = function() {
+    this.initialize_add_to_favorites();
+    this.initialize_remove_from_favorites();
+    this.hide_or_remove_add_to_favorites_link();
+  }
+  
+  Danbooru.Favorite.hide_or_remove_add_to_favorites_link = function() {
+    var favorites = $("meta[name=favorites]").attr("content");
+    var current_user = $("meta[name=current-user-id]").attr("content");
+    var regexp = new RegExp("\\bfav:" + current_user + "\\b");
+    if (favorites.match(regexp)) {
+      $("a#add-to-favorites").hide();
+    } else {
+      $("a#remove-from-favorites").hide();      
+    }
+  }
+  
+  Danbooru.Favorite.initialize_add_to_favorites = function() {
+    $("a#add-to-favorites").click(function(e) {
+      e.stopPropagation();
+      
+      $.ajax({
+        url: "/favorites",
+        data: {
+          id: $("meta[name=post-id]").attr("content")
+        },
+        beforeSend: function() {
+          $("img#add-to-favorites-wait").show();
+        },
+        success: function(data, text_status, xhr) {
+          $("a#add-to-favorites").hide();
+          $("a#remove-from-favorites").show();
+          $("img#add-to-favorites-wait").hide();
+        },
+        type: "post"
+      });
+      
+      return false;
+    });
+  }
+  
+  Danbooru.Favorite.initialize_remove_from_favorites = function() {
+    $("a#remove-from-favorites").click(function(e) {
+      e.stopPropagation();
+      
+      $.ajax({
+        url: "/favorites/" + $("meta[name=post-id]").attr("content"),
+        beforeSend: function() {
+          $("img#remove-from-favorites-wait").show();
+        },
+        success: function(data, text_status, xhr) {
+          $("a#add-to-favorites").show();
+          $("a#remove-from-favorites").hide();
+          $("img#remove-from-favorites-wait").hide();
+        },
+        type: "delete"
+      });
+      
+      return false;
+    });
+  }
+})();
+
+$(document).ready(function() {
+  Danbooru.Favorite.initialize_all();
+});