#!/usr/bin/ruby -w
#
# Gmail supports filters, but the interface provided doesn't make it appear
# to support filtering multiple addresses at the same time. It does,
# and given multiple addresses, this script will return a filter string
# that matches multiple sources. 
#
# Author: Robert Peaslee
# ...I know the multiple exit points are bad style, but this was quick.
#

if $*.length < 3
	p "Usage: filters.rb <from | to> <address1> <address2>...<addressN>"
	exit( 1 )
end

case $*[0]
	when "from"
		# Get rid of first element
		$*.shift
		
		string = "from:(" 
		$*.each { |addr|
			string << "#{addr}) OR from:("
		}
		string.slice!( -8, string.length )	
		p "Copy this into the filter:"
		p "#{string}"
		exit( 0 )
	when "to"
		# Get rid of first element
		$*.shift
		
		string = "to:(" 
		$*.each { |addr|
			string << "#{addr}) OR to:("
		}
		string.slice!( -8, string.length )	
		
		p "Copy this into the filter:"
		p "#{string}"
		exit( 0 )
	else
		p "Please supply either from or to as the first argument."
		exit( 1 )
end