实现给教师发课程留言邮件时根据教师设置判断是否发送邮件

app/models/mailer.rb

@@ -63,8 +63,11 @@ class Mailer < ActionMailer::Base
       #收件人邮箱
       @recipients ||= []
       @teachers.each do |teacher|
+        if teacher.user.notify_about? journals_for_message
           @recipients << teacher.user.mail
         end
+
+      end
       mail :to => @recipients,
            :subject => "#{l(:label_your_course)}#{journals_for_message.jour.name}#{l(:label_have_message)} "
     else

app/models/user.rb

@@ -645,6 +645,7 @@ class User < Principal
     end
   end
 
+
   # Return true if the user is allowed to do the specified action on a specific context
   # Action can be:
   # * a parameter-like Hash (eg. :controller => 'projects', :action => 'edit')
@@ -748,8 +749,37 @@ class User < Principal
       when News
         # always send to project members except when mail_notification is set to 'none'
         true
+        #判定用户是否接受留言提醒邮件
+      when JournalsForMessage
+        ##如果是直接留言并且留言对象是Project并且Project类型是课程（课程留言）
+        if !object.at_user && object.jour.class.to_s.to_sym == :Project && object.jour.project_type == 1
+            #根据用户设置邮件接收模式判定当前用户是否接受邮件提醒
+          is_notified_project object.jour
+          end
+
+      end
     end
   end
+
+  #用户是否接收project的消息提醒
+  def is_notified_project arg
+    if arg.is_a?(Project)
+      case mail_notification
+        when 'selected'
+          notified_projects_ids.include?(arg.id)
+        when 'only_my_events'
+          projects.include?(arg)
+        when 'only_assigned'
+          false
+        when 'only_owner'
+          course = Course.find_by_extra(arg.identifier)
+          course.teacher == self
+      end
+      #勾选的项目或用户的项目  TODO：需改
+      #notified_projects_ids.include?(arg) || projects.include?(arg)
+    else
+      false
+    end
   end
 
   def self.current=(user)