FEATURE: Export customizations as JSON files

app/assets/javascripts/admin/models/site_customization.js

@@ -84,7 +84,11 @@ Discourse.SiteCustomization = Discourse.Model.extend({
   destroy: function() {
     if (!this.id) return;
     return Discourse.ajax("/admin/site_customizations/" + this.id, { type: 'DELETE' });
-  }
+  },
+
+  download_url: function() {
+    return Discourse.getURL('/admin/site_customizations/' + this.id);
+  }.property('id')
 });
 
 var SiteCustomizations = Ember.ArrayProxy.extend({

app/assets/javascripts/admin/templates/customize_css_html.hbs

@@ -14,6 +14,7 @@
   <div {{bind-attr class=":current-style view.maximized:maximized"}}>
     <div class='wrapper'>
       {{text-field class="style-name" value=selectedItem.name}}
+      <a class="btn export" download target="_blank" href={{selectedItem.download_url}}>{{fa-icon "download"}} {{i18n 'admin.export_json.button_text'}}</a>
 
       <div class='admin-controls'>
         <ul class="nav nav-pills">

app/assets/stylesheets/common/admin/admin_base.scss

@@ -545,6 +545,9 @@ section.details {
     .preview-link {
       margin-left: 15px;
     }
+    .export {
+      float: right;
+    }
     padding-left: 10px;
     width: 70%;
     .style-name {

app/controllers/admin/site_customizations_controller.rb

@@ -2,6 +2,8 @@ class Admin::SiteCustomizationsController < Admin::AdminController
 
   before_filter :enable_customization
 
+  skip_before_filter :check_xhr, only: [:show]
+
   def index
     @site_customizations = SiteCustomization.order(:name)
 
@@ -48,6 +50,26 @@ class Admin::SiteCustomizationsController < Admin::AdminController
     end
   end
 
+  def show
+    @site_customization = SiteCustomization.find(params[:id])
+
+    respond_to do |format|
+      format.json do
+        check_xhr
+        render json: SiteCustomizationSerializer.new(@site_customization)
+      end
+
+      format.any(:html, :text) do
+        raise RenderEmpty.new if request.xhr?
+
+        response.headers['Content-Disposition'] = "attachment; filename=#{@site_customization.name.parameterize}.dcstyle.json"
+        response.sending_file = true
+        render json: SiteCustomizationSerializer.new(@site_customization)
+      end
+    end
+
+  end
+
   private
 
     def site_customization_params

app/serializers/site_customization_serializer.rb

@@ -0,0 +1,7 @@
+class SiteCustomizationSerializer < ApplicationSerializer
+
+  attributes :name, :enabled, :created_at, :updated_at,
+             :stylesheet, :header, :footer, :top,
+             :mobile_stylesheet, :mobile_header, :mobile_footer, :mobile_top,
+             :head_tag, :body_tag
+end

config/locales/client.en.yml

@@ -1863,6 +1863,8 @@ en:
           screened_email: "Export full screened email list in CSV format."
           screened_ip: "Export full screened IP list in CSV format."
           screened_url: "Export full screened URL list in CSV format."
+      export_json:
+        button_text: "Export"
 
       invite:
         button_text: "Send Invites"