#!/usr/local/bin/ruby
#
# USAGE: changeid.rb  %user% %formfile%"
#    Restricts new job creation to P4AUTHUSER
#    changes "new" jobids to be the value in
#    DTG_DTISSUE
#  
# To add the trigger to the Peforce server, add the following line to the
# trigger table:  
# 	jobId form-in job "<path-to>/changeid.rb %user% %formfile%"
#
# Define which user is allowed to create new jobs and edit ro fields
P4AUTHUSER = "p4dtguser"

##############################################
# Everything after this should be fine as is #
##############################################
if ARGV[0] == nil || ARGV[1] == nil then
	print "Trigger Error: Missing argument\n"
	exit 1
end

#
# P4 Form Data Class
#

class P4Form
	#
	# A form is composed of a set of fields interspersed with
	# comments delimited by the # character
	#
	# Fields are of the following two varieties:
	#   ^field: value
	#
	#   ^field:
	#   [\t ]value...
	#

	def initialize( formdata )
	  @fields = {}

	  infield=false
	  curfield=nil
	  curvalue=nil

	  formdata.each do |line|
	    line.chomp!
	    case line
	      when /^#/
	        # ignore comment lines
	      when /^[^\t ]/
	        # begin field
	        if infield && curvalue != nil && curvalue.strip != "" then
	          @fields[curfield] = curvalue
	        end
	        infield=true
	        curfield = line[/^[^:]*/].strip
	        curvalue = line.sub(/^[^:]*:[\t ]*/, "")
	      when /^[\t ]/
	        # continue field
	        if infield then
	          curvalue = "#{curvalue}\n#{line}"
	        else
	          # unknown
	        end
	      else
	        # unknown
	    end
	  end
	  
	  # If in a field, make sure to save it
	  if infield && curvalue != nil && curvalue.strip != "" then
	    @fields[curfield] = curvalue
	  end

	end

	attr_reader :fields

	def print(obj)
	  for f in @fields.keys do
	    obj.printf("%s: %s\n\n", f, fields[f])
	  end
	end

end

user=ARGV[0]
jobfile=ARGV[1]

t_file = File.new(jobfile, "r")
t_form = P4Form.new(t_file)
t_file.close
job = t_form.fields["Job"]
if job == "new" then
  if user != P4AUTHUSER then
    $stdout.printf("You are not authorized to create new jobs\n")
    exit 1 # Not authorized to create new jobs
  else
    t_form.fields["Job"] = t_form.fields["DTG_DTISSUE"]
    t_file = File.new(jobfile, "w")
    t_form.print(t_file)
  end
end
exit 0 # OK to proceed