From 53b27a76279dec2b1b4519b88ab83f86b22892a8 Mon Sep 17 00:00:00 2001
From: Ilya Zhitomirskiy <iz268@nyu.edu>
Date: Wed, 26 Oct 2011 16:27:28 -0700
Subject: [PATCH] added a rake task to email retention to admins

---
 app/mailers/notifier.rb | 16 +++++++++++-----
 lib/tasks/stats.rake    | 21 +++++++++++++++++++++
 2 files changed, 32 insertions(+), 5 deletions(-)
 create mode 100644 lib/tasks/stats.rake

diff --git a/app/mailers/notifier.rb b/app/mailers/notifier.rb
index bee70b83f..30d58056b 100644
--- a/app/mailers/notifier.rb
+++ b/app/mailers/notifier.rb
@@ -6,17 +6,23 @@ class Notifier < ActionMailer::Base
   def self.admin(string, recipients, opts = {})
     mails = []
     recipients.each do |rec|
-      mail = single_admin(string, rec)
+      mail = single_admin(string, rec, opts)
       mails << mail
     end
     mails
   end
 
-  def single_admin(string, recipient)
+  def single_admin(string, recipient, opts={})
     @receiver = recipient
     @string = string.html_safe
-    mail(:to => @receiver.email,
-         :subject => I18n.t('notifier.single_admin.subject'), :host => AppConfig[:pod_uri].host)
+
+    default_opts = {:to => @receiver.email,
+         :from => AppConfig[:smtp_sender_address],
+         :subject => I18n.t('notifier.single_admin.subject'),  :host => AppConfig[:pod_uri].host}
+    default_opts.merge!(opts)
+
+
+    mail(default_opts)
   end
 
   def started_sharing(recipient_id, sender_id)
@@ -63,4 +69,4 @@ class Notifier < ActionMailer::Base
   def with_recipient_locale(&block)
     I18n.with_locale(@notification.recipient.language, &block)
   end
-end
\ No newline at end of file
+end
diff --git a/lib/tasks/stats.rake b/lib/tasks/stats.rake
new file mode 100644
index 000000000..2a55f665b
--- /dev/null
+++ b/lib/tasks/stats.rake
@@ -0,0 +1,21 @@
+require File.join(Rails.root, 'lib', 'statistics' )
+
+namespace :stats do
+  desc 'Emails recent engagement statistics the admins'
+  task :email_retention => :environment do
+
+    return unless AppConfig[:admins].present? 
+
+    admins =  User.find_all_by_username( AppConfig[:admins])
+
+    require 'fastercsv'
+
+    string = FasterCSV.generate do |csv|
+      (0..32).each do |i|
+        csv << [i.to_s, Statistics.new.retention(i)]
+      end
+    end
+
+    Notifier.admin(string, admins, {:subject => "retention numbers #{Time.now.to_s}"})
+  end
+end