preview.rb in actionmailer-5.2.0.beta1

- old
+ new

@@ -1,5 +1,7 @@
+# frozen_string_literal: true
+
 require "active_support/descendants_tracker"
 
 module ActionMailer
   module Previews #:nodoc:
     extend ActiveSupport::Concern
@@ -13,28 +15,27 @@
 
       # Enable or disable mailer previews through app configuration:
       #
       #     config.action_mailer.show_previews = true
       #
-      # Defaults to true for development environment
+      # Defaults to +true+ for development environment
       #
       mattr_accessor :show_previews, instance_writer: false
 
       # :nodoc:
-      mattr_accessor :preview_interceptors, instance_writer: false
-      self.preview_interceptors = [ActionMailer::InlinePreviewInterceptor]
+      mattr_accessor :preview_interceptors, instance_writer: false, default: [ActionMailer::InlinePreviewInterceptor]
     end
 
     module ClassMethods
       # Register one or more Interceptors which will be called before mail is previewed.
       def register_preview_interceptors(*interceptors)
         interceptors.flatten.compact.each { |interceptor| register_preview_interceptor(interceptor) }
       end
 
       # Register an Interceptor which will be called before mail is previewed.
       # Either a class or a string can be passed in as the Interceptor. If a
-      # string is passed in it will be <tt>constantize</tt>d.
+      # string is passed in it will be constantized.
       def register_preview_interceptor(interceptor)
         preview_interceptor = \
           case interceptor
           when String, Symbol
             interceptor.to_s.camelize.constantize
@@ -50,38 +51,44 @@
   end
 
   class Preview
     extend ActiveSupport::DescendantsTracker
 
+    attr_reader :params
+
+    def initialize(params = {})
+      @params = params
+    end
+
     class << self
       # Returns all mailer preview classes.
       def all
         load_previews if descendants.empty?
         descendants
       end
 
       # Returns the mail object for the given email name. The registered preview
       # interceptors will be informed so that they can transform the message
       # as they would if the mail was actually being delivered.
-      def call(email)
-        preview = new
+      def call(email, params = {})
+        preview = new(params)
         message = preview.public_send(email)
         inform_preview_interceptors(message)
         message
       end
 
       # Returns all of the available email previews.
       def emails
         public_instance_methods(false).map(&:to_s).sort
       end
 
-      # Returns true if the email exists.
+      # Returns +true+ if the email exists.
       def email_exists?(email)
         emails.include?(email)
       end
 
-      # Returns true if the preview exists.
+      # Returns +true+ if the preview exists.
       def exists?(preview)
         all.any? { |p| p.preview_name == preview }
       end
 
       # Find a mailer preview by its underscored class name.
@@ -95,10 +102,10 @@
       end
 
       private
         def load_previews
           if preview_path
-            Dir["#{preview_path}/**/*_preview.rb"].each { |file| require_dependency file }
+            Dir["#{preview_path}/**/*_preview.rb"].sort.each { |file| require_dependency file }
           end
         end
 
         def preview_path
           Base.preview_path