To save the incident number from a gmail email, in partial pseudocode form.

gmail_save_incident_number.rb

require 'gmail'
require 'base64'
require 'nokogiri'
require 'date'
require 'redis'

redis=Redis.new

#credentials to login
login="change_this"
encrypted="change_this"

#credentials entered and inbox fetched
#username=Base64::decode64(login)
#password=Base64::decode64(encrypted)
username=login
password=encrypted
gmail=Gmail.new(username,password)
boa=gmail.inbox.emails(:from => "email_address_to_check@yourserver.com")

value="none"
boa.each do |email|
  subject_line= email.subject
  if subject_line.match(/substitute_your_regex/) 
    plain_part = email.multipart? ? (email.text_part ? email.text_part.body.decoded : nil) : email.body.decoded
    #with Nokogiri, assuming first value is in strong tag - a demonstration case to be replaced
    #you'll need to get the incident number too
    doc=Nokogiri::HTML(plain_part)
    value = doc.css("strong")[0].text
  end
end
gmail.logout

message_line = "Value is " + value
local_filename="incident.txt"
File.open(local_filename, 'w') {|f| f.write(message_line) }