# -*- encoding: utf-8 -*-
##############################################################################
#
#    OpenERP, Open Source Management Solution    
#    Copyright (C) 2004-2009 Tiny SPRL (<http://tiny.be>). All Rights Reserved
#    $Id$
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
##############################################################################

from osv import fields,osv

class showdiff(osv.osv_memory):
    _name = 'wizard.wiki.history.show_diff'
    
    def _get_diff(self, cr, uid, ctx):
        history = self.pool.get('wiki.wiki.history')
        ids = ctx.get('active_ids')
        diff = ""
        if len(ids) == 2:
            if ids[0] > ids[1]:
                diff = history.getDiff(cr, uid, ids[1], ids[0])
            else:
                diff = history.getDiff(cr, uid, ids[0], ids[1])

        elif len(ids) == 1:
            old = history.browse(cr, uid, ids[0])
            nids = history.search(cr, uid, [('wiki_id','=',old.wiki_id.id)])
            nids.sort()
            diff = history.getDiff(cr, uid, ids[0], nids[-1])
        else:
            raise osv.except_osv('Warning', "You need to select minimum 1 or maximum 2 history revision!")
        return diff

    _columns = {
        'diff': fields.text('Diff'),
    }
    _defaults = {
        'diff': _get_diff
    }
showdiff()