closet hangers page gets serious ajax action

app/controllers/closet_hangers_controller.rb

@@ -22,16 +22,35 @@ class ClosetHangersController < ApplicationController
 
     unless @closet_hanger.quantity == 0 # save the hanger, new record or not
       if @closet_hanger.save
+        respond_to do |format|
+          format.html {
             flash[:success] = "Success! You own #{@closet_hanger.quantity} #{@item.name.pluralize}."
+            redirect_back!
+          }
+
+          format.json { render :json => true }
+        end
       else
+        respond_to do |format|
+          format.html {
             flash[:alert] = "We couldn't save how many of this item you own: #{@closet_hanger.errors.full_messages.to_sentence}"
+            redirect_back!
+          }
+
+          format.json { render :json => {:errors => @closet_hanger.errors.full_messages}, :status => :unprocessable_entity }
+        end
       end
     else # delete the hanger since the user doesn't want it
       @closet_hanger.destroy
+      respond_to do |format|
+        format.html {
           flash[:success] = "Success! You do not own #{@item.name}."
-    end
+          redirect_back!
+        }
 
-    redirect_to params[:return_to] || @item
+        format.json { render :json => true }
+      end
+    end
   end
 
   alias_method :create, :update
@@ -41,5 +60,9 @@ class ClosetHangersController < ApplicationController
   def authorize_user!
     raise AccessDenied unless user_signed_in? && current_user.id == params[:user_id].to_i
   end
+
+  def redirect_back!
+    redirect_to params[:return_to] || @item
+  end
 end
 

app/stylesheets/_layout.sass

@@ -157,8 +157,8 @@ ul.buttons
 
 .object
   +inline-block
-  margin: .5em 0
-  padding: 0 .5em
+  margin: $object-padding 0
+  padding: 0 $object-padding
   position: relative
   text-align: center
   vertical-align: top

app/stylesheets/closet_hangers/_index.sass

@@ -24,8 +24,9 @@ body.closet_hangers-index
         padding: 2px 4px
         position: absolute
         left: ($object-width - $object-img-size) / 2 + $object-padding
+        line-height: 1
         text-align: left
-        top: $object-img-size - 24px
+        top: $object-img-size - 20px
 
         form
           display: none
@@ -35,11 +36,10 @@ body.closet_hangers-index
           font-weight: bold
 
     &.current-user
-      .object:hover
-        .quantity
+      .object:hover .quantity
         +opacity(1)
         background: transparent
-          top: $object-img-size - 25px
+        top: $object-img-size - 24px
         padding: 0
 
         span
@@ -55,3 +55,18 @@ body.closet_hangers-index
         input[type=submit]
           font-size: 85%
 
+      &.js
+        .object:hover .quantity
+          input[type=number]
+            width: 2.5em
+
+          input[type=submit]
+            display: none
+
+        .object.loading
+          background: $module-bg-color
+          outline: 1px solid $module-border-color
+
+          .quantity span:after
+            content: "…"
+

app/stylesheets/partials/clean/_constants.sass

@@ -24,7 +24,8 @@ $text-font:    "Droid Serif", Georgia, "Times New Roman", Times, serif
 
 $object-img-size:  80px
 $object-width:     100px
-$object-padding:   6px
+$object-padding:   8px
 $nc-icon-size:     16px
 
 $container-top-padding: 3em
+

app/views/closet_hangers/index.html.haml

@@ -4,8 +4,13 @@
     = link_to "Import closet from Neopets", new_closet_page_path, :id => 'import-link'
 - else
   - title "#{@user.name}'s Items"
+
 #closet-hangers{:class => user_is?(@user) ? 'current-user' : nil}
   - if !@closet_hangers.empty?
+    - if user_is?(@user)
+      %p
+        These are the items you own. Hover over an item to remove it from the
+        list or to change the quantity.
     = render @closet_hangers
   - else
     - if user_is?(@user)
@@ -22,3 +27,7 @@
     - else
       %p #{@user.name} hasn't tracked any items on Dress to Impress.
 
+- content_for :javascripts do
+  = include_javascript_libraries :jquery
+  = javascript_include_tag 'jquery.jgrowl.js', 'closet_hangers/index'
+

public/javascripts/closet_hangers/index.js

@@ -0,0 +1,70 @@
+(function () {
+  var hangersEl = $('#closet-hangers.current-user');
+  hangersEl.addClass('js');
+
+  $.fn.hasChanged = function () {
+    return this.data('previousValue') != this.val();
+  }
+
+  $.fn.revertValue = function () {
+    this.each(function () {
+      var el = $(this);
+      el.val(el.data('previousValue'));
+    });
+  }
+
+  $.fn.storeValue = function () {
+    this.each(function () {
+      var el = $(this);
+      el.data('previousValue', el.val());
+    });
+  }
+
+  function submitForm(form) {
+    if(form.data('loading')) return false;
+    var input = form.children("input[type=number]");
+    if(input.hasChanged()) {
+      var objectWrapper = form.closest(".object").addClass("loading");
+      var span = objectWrapper.find("span").text(input.val());
+      form.data('loading', true);
+
+      $.ajax({
+        url: form.attr("action") + ".json",
+        type: "post",
+        data: form.serialize(),
+        dataType: "json",
+        complete: function (data) {
+          objectWrapper.removeClass("loading");
+          form.data('loading', false);
+        },
+        success: function () {
+          input.storeValue();
+        },
+        error: function (xhr) {
+          var data = $.parseJSON(xhr.responseText);
+          input.revertValue();
+          span.text(input.val());
+          if(typeof data.errors != 'undefined') {
+            $.jGrowl("Error updating quantity: " + data.errors.join(", "));
+          } else {
+            $.jGrowl("We had trouble updating the quantity just now. Try again?");
+          }
+        }
+      });
+    }
+  }
+
+  hangersEl.find('form').submit(function (e) {
+    e.preventDefault();
+    submitForm($(this));
+  });
+
+  hangersEl.find('input[type=number]').change(function () {
+    submitForm($(this).parent());
+  }).storeValue();
+
+  hangersEl.find('div.object').mouseleave(function () {
+    submitForm($(this).find('form'));
+  });
+})();
+

public/stylesheets/compiled/screen.css

@@ -271,8 +271,8 @@ ul.buttons li, ul.buttons li form {
   vertical-align: middle;
   *display: inline;
   *vertical-align: auto;
-  margin: 0.5em 0;
-  padding: 0 0.5em;
+  margin: 8px 0;
+  padding: 0 8px;
   position: relative;
   text-align: center;
   vertical-align: top;
@@ -323,11 +323,11 @@ ul.buttons li, ul.buttons li form {
 }
 /* line 190, ../../../app/stylesheets/_layout.sass */
 .object .nc-icon {
-  right: 16px;
+  right: 18px;
 }
 /* line 193, ../../../app/stylesheets/_layout.sass */
 .object .closeted-icon {
-  left: 16px;
+  left: 18px;
 }
 
 /* line 196, ../../../app/stylesheets/_layout.sass */
@@ -610,15 +610,16 @@ body.closet_hangers-index #closet-hangers .object .quantity {
   background: white;
   padding: 2px 4px;
   position: absolute;
-  left: 16px;
+  left: 18px;
+  line-height: 1;
   text-align: left;
-  top: 56px;
+  top: 60px;
 }
-/* line 30, ../../../app/stylesheets/closet_hangers/_index.sass */
+/* line 31, ../../../app/stylesheets/closet_hangers/_index.sass */
 body.closet_hangers-index #closet-hangers .object .quantity form {
   display: none;
 }
-/* line 33, ../../../app/stylesheets/closet_hangers/_index.sass */
+/* line 34, ../../../app/stylesheets/closet_hangers/_index.sass */
 body.closet_hangers-index #closet-hangers .object .quantity span, body.closet_hangers-index #closet-hangers .object .quantity input[type=number] {
   font-size: 16px;
   font-weight: bold;
@@ -630,7 +631,7 @@ body.closet_hangers-index #closet-hangers.current-user .object:hover .quantity {
   -o-opacity: 1;
   -khtml-opacity: 1;
   background: transparent;
-  top: 55px;
+  top: 56px;
   padding: 0;
 }
 /* line 45, ../../../app/stylesheets/closet_hangers/_index.sass */
@@ -642,7 +643,7 @@ body.closet_hangers-index #closet-hangers.current-user .object:hover .quantity f
   display: inline;
 }
 /* line 51, ../../../app/stylesheets/closet_hangers/_index.sass */
-body.closet_hangers-index #closet-hangers.current-user .object:hover .quantity form input[type=number] {
+body.closet_hangers-index #closet-hangers.current-user .object:hover .quantity input[type=number] {
   padding: 2px;
   width: 2em;
 }
@@ -650,6 +651,23 @@ body.closet_hangers-index #closet-hangers.current-user .object:hover .quantity f
 body.closet_hangers-index #closet-hangers.current-user .object:hover .quantity input[type=submit] {
   font-size: 85%;
 }
+/* line 60, ../../../app/stylesheets/closet_hangers/_index.sass */
+body.closet_hangers-index #closet-hangers.current-user.js .object:hover .quantity input[type=number] {
+  width: 2.5em;
+}
+/* line 63, ../../../app/stylesheets/closet_hangers/_index.sass */
+body.closet_hangers-index #closet-hangers.current-user.js .object:hover .quantity input[type=submit] {
+  display: none;
+}
+/* line 66, ../../../app/stylesheets/closet_hangers/_index.sass */
+body.closet_hangers-index #closet-hangers.current-user.js .object.loading {
+  background: #eeffee;
+  outline: 1px solid #006600;
+}
+/* line 70, ../../../app/stylesheets/closet_hangers/_index.sass */
+body.closet_hangers-index #closet-hangers.current-user.js .object.loading .quantity span:after {
+  content: "…";
+}
 
 /* line 3, ../../../app/stylesheets/closet_pages/_new.sass */
 body.closet_pages-new #closet-page-form, body.closet_pages-create #closet-page-form {