#!/usr/bin/env ruby
################################################################################
#  Copyright 2007 Codehaus Foundation                                          #
#                                                                              #
#  Licensed under the Apache License, Version 2.0 (the "License");             #
#  you may not use this file except in compliance with the License.            #
#  You may obtain a copy of the License at                                     #
#                                                                              #
#     http://www.apache.org/licenses/LICENSE-2.0                               #
#                                                                              #
#  Unless required by applicable law or agreed to in writing, software         #
#  distributed under the License is distributed on an "AS IS" BASIS,           #
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.    #
#  See the License for the specific language governing permissions and         #
#  limitations under the License.                                              #
################################################################################
# This script is extremely useful for migrating users from one group to another
# where you don't want duplicates; i.e. creating an admin group which has a superset
# of the permission of the second group.
$: <<  'lib'
require 'jira4r/jira_tool.rb'

# Will 
if ARGV.length != 5
  puts "Usage: subtract-members URL USER PASS GROUP-A GROUP-B"
  puts "       Removes all members from GROUP-A that are in GROUP-B"
  puts "       subtract-members http://jira.example.com jim password clown-developers clown-dev"
  exit 1
end

url, username, password, group_a, group_b = ARGV
jira =  Jira4R::JiraTool.new(2, url)
jira.login(username, password)


jira_group_a = jira.getGroup(group_a)
jira_group_b = jira.getGroup(group_b)

remote_users = {}
users_a = jira_group_a.users.collect { |u| 
  remote_users[u.name] = u
  u.name 
}
users_b = jira_group_b.users.collect { |u| 
  remote_users[u.name] = u
  u.name 
}

for user in users_a
  if users_b.include?(user)
    puts "Removing #{user} from #{group_a}"
    jira.removeUserFromGroup(jira_group_a, remote_users[user])
  end
end