add code for database restore

close NARKOZ#33

Author: NARKOZ

kumar_asshole.rb

@@ -9,12 +9,21 @@
 GMAIL_PASSWORD = ENV['GMAIL_PASSWORD']
 
 gmail = Gmail.connect(GMAIL_USERNAME, GMAIL_PASSWORD)
+kumars_email = '[email protected]'
 
+DB_NAME_REGEX  = /\S+_staging/
 KEYWORDS_REGEX = /sorry|help|wrong/i
 
-gmail.inbox.find(:unread, from: '[email protected]').each do |email|
-  if email.body[KEYWORDS_REGEX]
-    # Restore DB and send a reply
+gmail.inbox.find(:unread, from: kumars_email).each do |email|
+  if email.body[KEYWORDS_REGEX] && (db_name = email.body[DB_NAME_REGEX])
+    backup_file = "/home/backups/databases/#{db_name}-" + (Date.today - 1).strftime('%Y%m%d') + '.gz'
+    abort 'ERROR: Backup file not found' unless File.exist?(backup_file)
+
+    # Restore DB
+    `gunzip -c #{backup_file} | psql #{db_name}`
+
+    # Mark as read, add label and reply
+    email.read!
     email.label('Database fixes')
     reply = create_reply(email.subject)
     gmail.deliver(reply)
@@ -23,7 +32,7 @@
 
 def create_reply(subject)
   gmail.compose do
-    to "[email protected]"
+    to kumars_email
     subject "RE: #{subject}"
     body "No problem. I've fixed it. \n\n Please be careful next time."
   end