Admin interface for listing, adding and removing custom emojis (#5002)

* Admin interface for listing, adding and removing custom emojis

* Only display local ones in the list

app/controllers/admin/custom_emojis_controller.rb

@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+module Admin
+  class CustomEmojisController < BaseController
+    def index
+      @custom_emojis = CustomEmoji.where(uri: nil)
+    end
+
+    def new
+      @custom_emoji = CustomEmoji.new
+    end
+
+    def create
+      @custom_emoji = CustomEmoji.new(resource_params)
+
+      if @custom_emoji.save
+        redirect_to admin_custom_emojis_path, notice: I18n.t('admin.custom_emojis.created_msg')
+      else
+        render :new
+      end
+    end
+
+    def destroy
+      CustomEmoji.find(params[:id]).destroy
+      redirect_to admin_custom_emojis_path, notice: I18n.t('admin.custom_emojis.destroyed_msg')
+    end
+
+    private
+
+    def resource_params
+      params.require(:custom_emoji).permit(:shortcode, :image)
+    end
+  end
+end