#
# Copyright (c) 2005-2006, John Mettraux, OpenWFE.org
# All rights reserved.
# 
# Redistribution and use in source and binary forms, with or without 
# modification, are permitted provided that the following conditions are met:
# 
# . Redistributions of source code must retain the above copyright notice, this
#   list of conditions and the following disclaimer.  
# 
# . Redistributions in binary form must reproduce the above copyright notice, 
#   this list of conditions and the following disclaimer in the documentation 
#   and/or other materials provided with the distribution.
# 
# . Neither the name of the "OpenWFE" nor the names of its contributors may be
#   used to endorse or promote products derived from this software without
#   specific prior written permission.
# 
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
# POSSIBILITY OF SUCH DAMAGE.
#
# $Id: restclient.rb 3454 2006-10-08 16:51:00Z jmettraux $
#

#
# "hecho en Costa Rica"
#

require 'base64'
require 'net/http'
require 'rexml/document'


module OpenWFE

    class RestClient

        attr_reader :host, :port, :resource, :sessionId

        def initialize (url, username, password)

            splitUrl(url)
            @username = username

            connect(password)
        end

        #
        # Closes this REST client
        #
        def close ()

            post('endWorkSession', nil, {}, nil)
        end

        protected

            def get (action, subResourceName, params)

                return @httpclient\
                    .get(computeResource(action, subResourceName, params))
            end

            def post (action, subResourceName, params, data)

                data = data.to_s()

                return @httpclient\
                    .post(computeResource(action, subResourceName, params), data)
            end

        private

            def splitUrl (url)

                @host = nil
                @port = nil
                @resource = nil

                url = url[7..-1] if url[0..6] == 'http://'

                i = url.index('/')
                if i < 0
                    @resource = '/defaultrestresource'
                else
                    @resource = url[i..-1]
                    url = url[0..i]
                end

                @host, @port = url.split(':')

                if @port == nil
                    @port = 5080
                else
                    @port = Integer(@port[0..-2])
                end
            end

            def connect (password)

                @httpclient = Net::HTTP.new(@host, @port)

                hs = {}
                hs['Authorization'] = \
                    'Basic ' + Base64.encode64(@username+":"+password)
                hs['RestClient'] = 'openwfe-ruby'

                r = @httpclient.get(@resource, hs)

                xml = REXML::Document.new(r.body)

                @sessionId = Integer(xml.root.attributes["id"])
            end

            def computeResource (action, subResourceName, params)

                resource = @resource
                resource = resource+'/'+subResourceName if subResourceName

                resource = resource+\
                    '?session='+@sessionId.to_s()+'&action='+action

                if params
                    params.keys.each do |k|
                        resource = resource+'&'+k.to_s()+'='+params[k].to_s()
                    end
                end

                return resource
            end
    end
end


# for test purposes
#
#client = RestClient::RestClient\
#   .new("127.0.0.1:5080/worklist", "alice", "alice")
#client = OpenWFE::RestClient\
#   .new("http://127.0.0.1:5080/worklist", "alice", "alice")
#
#puts "sessionId : #{client.sessionId}"
#
#puts client.get('getstorenames', nil, nil)
#puts client.get('getheaders', 'Store.alpha', nil)