# -*- coding: utf-8 -*-
# Copyright (C) 2006 Ashwin Phatak

import re
from trac.core import *
from trac.web.chrome import INavigationContributor, ITemplateProvider
from trac.web.main import IRequestHandler
from trac.perm import IPermissionRequestor        
from trac.ticket.query import QueryModule
from trac.util.html import html
from trac.ticket import TicketSystem
from trac.ticket import Ticket
from trac.mimeview.api import IContentConverter
from trac.wiki import IWikiSyntaxProvider
from trac.wiki.macros import WikiMacroBase
from trac.ticket.query import TicketQueryMacro as Macro

__all__ = ['BatchModifyModule','TicketQueryMacro']

class BatchModifyModule(Component):
    '''Allows batch modification of tickets'''

    implements(INavigationContributor, IRequestHandler, ITemplateProvider, \
            IPermissionRequestor, IContentConverter, IWikiSyntaxProvider)
    
    # INavigationContributor methods

    def get_active_navigation_item(self, req):
        return QueryModule(self.env).get_active_navigation_item(req)

    def get_navigation_items(self, req):
        from trac.ticket.report import ReportModule
        if req.perm.has_permission('TICKET_VIEW') and \
                not self.env.is_component_enabled(ReportModule):
            yield ('mainnav', 'tickets',
                   html.A('View Tickets', href=req.href.query()))
        elif req.perm.has_permission('TICKET_BATCH_MODIFY'):
            yield ('mainnav', 'query',
                   html.A('Custom Query', href=req.href.query()))


    # IRequestHandler methods

    def match_request(self, req):
        return QueryModule(self.env).match_request(req)
    
    def process_request(self, req):
        if req.args.has_key('batchmod'):
            req.perm.assert_permission('TICKET_BATCH_MODIFY')
            self._batch_modify(req)

        QueryModule(self.env).process_request(req)
        self._add_ticket_fields(req)
     
        return 'batchmod.cs', None


    # ITemplateProvider methods

    def get_templates_dirs(self):
        from pkg_resources import resource_filename
        return [resource_filename(__name__, 'templates')]

    def get_htdocs_dirs(self):
        return []
 
    # IPermissionRequestor methods
    def get_permission_actions(self):
        yield 'TICKET_BATCH_MODIFY'


    # IContentConverter methods
    def get_supported_conversions(self):
        return QueryModule(self.env).get_supported_conversions()    

    def convert_content(self, req, mimetype, query, key):
        return QueryModule(self.env).convert_content(req, mimetype, query, key)


    # IWikiSyntaxProvider methods

    def get_wiki_syntax(self):
        return QueryModule(self.env).get_wiki_syntax() 

    def get_link_resolvers(self):
        return QueryModule(self.env).get_link_resolvers()


    # Internal methods 
    def _batch_modify(self, req):
        tickets = req.session['query_tickets'].split(' ')
        comment = req.args.get('comment', '') 
        values = {} 
        
        for field in TicketSystem(self.env).get_ticket_fields():
            name = field['name']
            if name not in ('summary', 'reporter', \
                        'description', 'type', 'status',
                        'resolution', 'owner'):
                if req.args.has_key('bm_' + name):
                    values[name] = req.args.get(name)

        for id in tickets:
            t = Ticket(self.env, id) 
            t.populate(values)
            t.save_changes(req.authname, comment)



    def _add_ticket_fields(self, req):   
        for field in TicketSystem(self.env).get_ticket_fields():
            name = field['name']
            del field['name']
            if name in ('summary', 'reporter', 'description', 'type', 'status',
                        'resolution', 'owner'):
                field['skip'] = True
            req.hdf['ticket.fields.' + name] = field


class TicketQueryMacro(WikiMacroBase):
    __doc__ = Macro.__doc__

    def render_macro(self, req, name, content):
        return Macro(self.env).render_macro(req, name, content)