Check daily if there are new users who need to be approved and send a pm to moderators

app/services/group_message.rb

@@ -42,10 +42,16 @@ class GroupMessage
   end
 
   def message_params
-    @message_params ||= {
-      username: @opts[:user].username,
-      user_url: admin_user_path(@opts[:user].username)
-    }
+    @message_params ||= begin
+      h = @opts[:message_params]||{}
+      if @opts[:user]
+        h.merge!({
+          username: @opts[:user].username,
+          user_url: admin_user_path(@opts[:user].username)
+        })
+      end
+      h
+    end
   end
 
   def sent_recently?

config/locales/server.en.yml

@@ -952,6 +952,15 @@ en:
 
         You can now create new replies and topics again.
 
+    pending_users_reminder:
+      subject_template:
+        one: "There is 1 unapproved user"
+        other: "There are %{count} unapproved users"
+      text_body_template: |
+        There are new users waiting to be approved.
+
+        [Please review them in the admin section](/admin/users/list/pending).
+
   unsubscribe_link: "To unsubscribe from these emails, visit your [user preferences](%{user_preferences_url})."
 
   user_notifications:

lib/jobs/pending_users_reminder.rb

@@ -0,0 +1,20 @@
+require_dependency 'admin_user_index_query'
+
+module Jobs
+
+  class PendingUsersReminder < Jobs::Scheduled
+
+    recurrence { daily.hour_of_day(9) }
+
+    def execute(args)
+      if SiteSetting.must_approve_users
+        count = AdminUserIndexQuery.new({query: 'pending'}).find_users_query.count
+        if count > 0
+          GroupMessage.create(Group[:moderators].name, :pending_users_reminder, {limit_once_per: false, message_params: {count: count}})
+        end
+      end
+    end
+
+  end
+
+end

spec/components/jobs/pending_users_reminder_spec.rb

@@ -0,0 +1,34 @@
+require 'spec_helper'
+
+describe Jobs::PendingUsersReminder do
+
+  context 'must_approve_users is true' do
+    before do
+      SiteSetting.stubs(:must_approve_users).returns(true)
+    end
+
+    it "doesn't send a message to anyone when there are no pending users" do
+      AdminUserIndexQuery.any_instance.stubs(:find_users_query).returns(stub_everything(count: 0))
+      GroupMessage.any_instance.expects(:create).never
+      Jobs::PendingUsersReminder.new.execute({})
+    end
+
+    it "sends a message to moderators when there are pending users" do
+      AdminUserIndexQuery.any_instance.stubs(:find_users_query).returns(stub_everything(count: 1))
+      GroupMessage.expects(:create).with(Group[:moderators].name, :pending_users_reminder, anything)
+      Jobs::PendingUsersReminder.new.execute({})
+    end
+  end
+
+  context 'must_approve_users is false' do
+    before do
+      SiteSetting.stubs(:must_approve_users).returns(false)
+    end
+
+    it "doesn't send a message to anyone when there are pending users" do
+      AdminUserIndexQuery.any_instance.stubs(:find_users_query).returns(stub_everything(count: 1))
+      GroupMessage.any_instance.expects(:create).never
+      Jobs::PendingUsersReminder.new.execute({})
+    end
+  end
+end