Add endpoints for removing enterprise images

app/controllers/api/base_controller.rb

@@ -9,5 +9,9 @@ module Api
     include ActionController::UrlFor
     include Rails.application.routes.url_helpers
     use_renderers :json
+
+    def respond_with_conflict(json_hash)
+      render json: json_hash, status: :conflict
+    end
   end
 end

app/controllers/api/enterprise_attachment_controller.rb

@@ -0,0 +1,37 @@
+module Api
+  class EnterpriseAttachmentController < BaseController
+    class MissingImplementationError < StandardError; end
+    class UnknownEnterpriseAuthorizationActionError < StandardError; end
+
+    before_filter :load_enterprise
+
+    respond_to :json
+
+    def destroy
+      return respond_with_conflict(error: destroy_attachment_does_not_exist_error_message) unless @enterprise.public_send("#{attachment_name}?")
+
+      @enterprise.update_attributes!(attachment_name => nil)
+      render json: @enterprise, serializer: Admin::EnterpriseSerializer, spree_current_user: spree_current_user
+    end
+
+    protected
+
+    def attachment_name
+      raise MissingImplementationError, "Method attachment_name should be defined"
+    end
+
+    def enterprise_authorize_action
+      raise MissingImplementationError, "Method enterprise_authorize_action should be defined"
+    end
+
+    def load_enterprise
+      @enterprise = Enterprise.find_by_permalink(params[:enterprise_id].to_s)
+      raise UnknownEnterpriseAuthorizationActionError if enterprise_authorize_action.blank?
+      authorize!(enterprise_authorize_action, @enterprise)
+    end
+
+    def destroy_attachment_does_not_exist_error_message
+      I18n.t("api.enterprise_#{attachment_name}.destroy_attachment_does_not_exist")
+    end
+  end
+end

app/controllers/api/logos_controller.rb

@@ -0,0 +1,16 @@
+module Api
+  class LogosController < EnterpriseAttachmentController
+    private
+
+    def attachment_name
+      :logo
+    end
+
+    def enterprise_authorize_action
+      case action_name.to_sym
+      when :destroy
+        :remove_logo
+      end
+    end
+  end
+end

app/controllers/api/promo_images_controller.rb

@@ -0,0 +1,16 @@
+module Api
+  class PromoImagesController < EnterpriseAttachmentController
+    private
+
+    def attachment_name
+      :promo_image
+    end
+
+    def enterprise_authorize_action
+      case action_name.to_sym
+      when :destroy
+        :remove_promo_image
+      end
+    end
+  end
+end