allow ordering categories in the edit category ui

app/assets/javascripts/discourse/models/category.js

@@ -57,7 +57,8 @@ Discourse.Category = Discourse.Model.extend({
         hotness: this.get('hotness'),
         secure: this.get('secure'),
         permissions: this.get('permissionsForUpdate'),
-        auto_close_days: this.get('auto_close_days')
+        auto_close_days: this.get('auto_close_days'),
+        position: this.get('position')
       },
       type: this.get('id') ? 'PUT' : 'POST'
     });

app/assets/javascripts/discourse/templates/modal/edit_category.js.handlebars

@@ -86,6 +86,11 @@
           {{autoCloseForm autoCloseDays=auto_close_days labelKey="category.auto_close_label"}}
         </section>
 
+        <section class='field'>
+          <label>{{i18n category.position}}</label>
+          {{textField value=position}}
+        </section>
+
         <section class='field'>
           <label>{{i18n category.hotness}}</label>
           {{view Discourse.HotnessView hotnessBinding="hotness"}}

app/controllers/categories_controller.rb

@@ -52,12 +52,17 @@ class CategoriesController < ApplicationController
     @category = Category.create(category_params.merge(user: current_user))
     return render_json_error(@category) unless @category.save
 
+    @category.move_to(category_params[:position].to_i) if category_params[:position]
+
     render_serialized(@category, CategorySerializer)
   end
 
   def update
     guardian.ensure_can_edit!(@category)
-    json_result(@category, serializer: CategorySerializer) { |cat| cat.update_attributes(category_params) }
+    json_result(@category, serializer: CategorySerializer) { |cat|
+      cat.update_attributes(category_params)
+      cat.move_to(category_params[:position].to_i) if category_params[:position]
+    }
   end
 
   def destroy
@@ -74,17 +79,19 @@ class CategoriesController < ApplicationController
     end
 
     def category_params
-      required_param_keys.each do |key|
-        params.require(key)
-      end
-
-      if p = params[:permissions]
-        p.each do |k,v|
-          p[k] = v.to_i
+      @category_params ||= begin
+        required_param_keys.each do |key|
+          params.require(key)
         end
-      end
 
-      params.permit(*required_param_keys, :hotness, :auto_close_days, :permissions => [*p.try(:keys)])
+        if p = params[:permissions]
+          p.each do |k,v|
+            p[k] = v.to_i
+          end
+        end
+
+        params.permit(*required_param_keys, :position, :hotness, :auto_close_days, :permissions => [*p.try(:keys)])
+      end
     end
 
     def fetch_category

app/serializers/category_serializer.rb

@@ -1,6 +1,6 @@
 class CategorySerializer < BasicCategorySerializer
 
-  attributes :read_restricted, :available_groups, :auto_close_days, :group_permissions
+  attributes :read_restricted, :available_groups, :auto_close_days, :group_permissions, :position
 
   def group_permissions
     @group_permissions ||= begin

config/locales/client.en.yml

@@ -975,6 +975,7 @@ en:
       edit_permissions: "Edit Permissions"
       add_permission: "Add Permission"
       this_year: "this year"
+      position: "position"
 
     flagging:
       title: 'Why are you flagging this post?'