upload template from URL

app/controllers/templates_uploads_controller.rb

@@ -3,20 +3,55 @@
 class TemplatesUploadsController < ApplicationController
   load_and_authorize_resource :template, parent: false
 
+  layout 'plain'
+
+  def show; end
+
   def create
+    url_params = create_file_params_from_url if params[:url].present?
+
     @template.account = current_account
     @template.author = current_user
     @template.folder = TemplateFolders.find_or_create_by_name(current_user, params[:folder_name])
-    @template.name = File.basename(params[:files].first.original_filename, '.*')
+    @template.name = File.basename((url_params || params)[:files].first.original_filename, '.*')
 
     @template.save!
 
-    documents = Templates::CreateAttachments.call(@template, params)
+    documents = Templates::CreateAttachments.call(@template, url_params || params)
 
     schema = documents.map { |doc| { attachment_uuid: doc.uuid, name: doc.filename.base } }
 
     @template.update!(schema:)
 
     redirect_to edit_template_path(@template)
+  rescue StandardError => e
+    Rollbar.error(e) if defined?(Rollbar)
+
+    redirect_to root_path, alert: 'Unable to upload file'
+  end
+
+  private
+
+  def create_file_params_from_url
+    tempfile = Tempfile.new
+    tempfile.binmode
+    tempfile.write(conn.get(params[:url]).body)
+    tempfile.rewind
+
+    file = ActionDispatch::Http::UploadedFile.new(
+      tempfile:,
+      filename: File.basename(
+        URI.decode_www_form_component(params[:filename].presence || params[:url])
+      ),
+      type: Marcel::MimeType.for(tempfile)
+    )
+
+    { files: [file] }
+  end
+
+  def conn
+    Faraday.new do |faraday|
+      faraday.response :follow_redirects
+    end
   end
 end