FEATURE: custom emojis

app/controllers/admin/emojis_controller.rb

@@ -0,0 +1,36 @@
+class Admin::EmojisController < Admin::AdminController
+
+  def index
+    render_serialized(Emoji.custom, EmojiSerializer, root: false)
+  end
+
+  def create
+    file = params[:file] || params[:files].first
+    name = params[:name] || File.basename(file.original_filename, ".*")
+
+    # fix the name
+    name = name.gsub(/[^a-z0-9]+/i, '_')
+               .gsub(/_{2,}/, '_')
+               .downcase
+
+    # check the name doesn't already exist
+    if Emoji.all.detect { |e| e.name == name }
+      render json: failed_json.merge(message: I18n.t("emoji.errors.name_already_exists", name: name)), status: 422
+    else
+      if emoji = Emoji.create_for(file, name)
+        render_serialized(emoji, EmojiSerializer, root: false)
+      else
+        render json: failed_json.merge(message: I18n.t("emoji.errors.error_while_storing_emoji")), status: 422
+      end
+    end
+
+  end
+
+  def destroy
+    name = params.require(:id)
+    Emoji.custom.detect { |e| e.name == name }.try(:remove)
+    render nothing: true
+  end
+
+end
+