Log mail delivery errors to database and add an UI for it

app/controllers/admin/mail_delivery_status_controller.rb

@@ -0,0 +1,30 @@
+class Admin::MailDeliveryStatusController < Admin::BaseController
+  inherit_resources
+
+  def index
+    @maildeliverystatus = MailDeliveryStatus.order(created_at: :desc)
+    @maildeliverystatus = @maildeliverystatus.where(email: params[:email]) unless params[:email].blank?
+    @maildeliverystatus = @maildeliverystatus.page(params[:page]).per(@per_page)
+  end
+
+  def show
+    @maildeliverystatus = MailDeliveryStatus.find(params[:id])
+    filename = "maildeliverystatus_#{params[:id]}.#{MIME::Types[@maildeliverystatus.attachment_mime].first.preferred_extension}"
+    send_data(@maildeliverystatus.attachment_data, :filename => filename, :type => @maildeliverystatus.attachment_mime)
+  end
+
+  def destroy_all
+    @maildeliverystatus = MailDeliveryStatus.delete_all
+    redirect_to admin_mail_delivery_status_index_path, notice: t('.notice')
+  rescue => error
+    redirect_to admin_mail_delivery_status_index_path, alert: I18n.t('errors.general_msg', msg: error.message)
+  end
+
+  def destroy
+    @maildeliverystatus = MailDeliveryStatus.find(params[:id])
+    @maildeliverystatus.destroy
+    redirect_to admin_mail_delivery_status_index_path, notice: t('.notice')
+  rescue => error
+    redirect_to admin_mail_delivery_status_index_path, I18n.t('errors.general_msg', msg: error.message)
+  end
+end

app/controllers/admin/users_controller.rb

@@ -3,6 +3,7 @@ class Admin::UsersController < Admin::BaseController
 
   def index
     @users = params[:show_deleted] ? User.deleted : User.undeleted
+    @users = @users.includes(:mail_delivery_status)
 
     # if somebody uses the search field:
     @users = @users.natural_search(params[:user_name]) unless params[:user_name].blank?

app/mailers/mailer.rb

@@ -102,7 +102,7 @@ class Mailer < ActionMailer::Base
     message = yield
     message.deliver_now
   rescue => error
-    Rails.logger.warn "Can't deliver mail to #{message.to[0]}: #{error.message}"
+    MailDeliveryStatus.create email: message.to[0], message: error.message
   end
 
 end

app/models/mail_delivery_status.rb

@@ -0,0 +1,5 @@
+class MailDeliveryStatus < ActiveRecord::Base
+  self.table_name = 'mail_delivery_status'
+
+  belongs_to :user, foreign_key: 'email', primary_key: 'email'
+end

app/models/user.rb

@@ -18,6 +18,7 @@ class User < ActiveRecord::Base
   has_many :tasks, :through => :assignments
   has_many :send_messages, :class_name => "Message", :foreign_key => "sender_id"
   has_many :created_orders, :class_name => 'Order', :foreign_key => 'created_by_user_id', :dependent => :nullify
+  has_many :mail_delivery_status, :class_name => 'MailDeliveryStatus', :foreign_key => 'email', :primary_key => 'email'
   
   attr_accessor :password, :settings_attributes
 

app/views/admin/mail_delivery_status/_maildeliverystatus.html.haml

@@ -0,0 +1,26 @@
+- if MailDeliveryStatus.count > 20
+  = items_per_page
+= pagination_links_remote @maildeliverystatus
+%table.table.table-striped
+  %thead
+    %tr
+      %th= heading_helper MailDeliveryStatus, :created_at
+      %th= heading_helper MailDeliveryStatus, :email
+      %th= heading_helper MailDeliveryStatus, :message
+      %th= t 'ui.actions'
+  %tbody
+    - for maildeliverystatus in @maildeliverystatus
+      %tr{:class => cycle('even','odd', :name => 'groups')}
+        %td= format_time maildeliverystatus.created_at
+        %td
+          - if user = maildeliverystatus.user
+            = link_to maildeliverystatus.email, [:admin, user]
+          - else
+            = maildeliverystatus.email
+        %td
+          - if maildeliverystatus.attachment_data
+            = link_to maildeliverystatus.message, [:admin, maildeliverystatus]
+          - else
+            = maildeliverystatus.message
+        %td
+          = link_to t('ui.delete'), [:admin, maildeliverystatus], :method => :delete, class: 'btn btn-mini btn-danger'

app/views/admin/mail_delivery_status/index.html.haml

@@ -0,0 +1,7 @@
+- title t('.title')
+
+- content_for :actionbar do
+  = link_to t('.destroy_all'), admin_mail_delivery_status_index_path, :method => :delete, class: 'btn btn-danger'
+
+#maildeliverystatus
+  = render "maildeliverystatus"

app/views/admin/mail_delivery_status/index.js.haml

@@ -0,0 +1 @@
+$('#maildeliverystatus').html('#{escape_javascript(render("maildeliverystatus"))}');

app/views/admin/users/_users.html.haml

@@ -17,7 +17,10 @@
         %td= link_to show_user(user), [:admin, user]
         - if FoodsoftConfig[:use_nick]
           %td= user.name
-        %td= user.email
+        %td
+          = user.email
+          - if user.mail_delivery_status.any?
+            = link_to t('.show_email_problems'), admin_mail_delivery_status_index_path(email: user.email), class: 'btn btn-warning btn-mini'
         %td= format_roles(user, true)
         %td= format_time(user.last_activity)
         %td= link_to t('ui.edit'), edit_admin_user_path(user), class: 'btn btn-mini'

app/views/admin/users/show.html.haml

@@ -12,7 +12,10 @@
         %dt= heading_helper User, :name
         %dd= h @user.name
         %dt= heading_helper User, :email
-        %dd= @user.email
+        %dd
+          = @user.email
+          - if @user.mail_delivery_status.any?
+            = link_to t('.show_email_problems'), admin_mail_delivery_status_index_path(email: @user.email), class: 'btn btn-warning btn-mini'
         %dt= heading_helper User, :phone
         %dd= @user.phone
         %dt= heading_helper User, :last_login