# phabdiff.py
#
# Copyright 2013 Facebook, Inc.
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

from mercurial import registrar, templatekw
from mercurial.node import hex
from hgext.extlib.phabricator import diffprops
import re

templatekeyword = registrar.templatekeyword()

@templatekeyword('phabdiff')
def showphabdiff(repo, ctx, templ, **args):
    """String. Return the phabricator diff id for a given hg rev."""
    descr = ctx.description()
    revision = diffprops.parserevfromcommitmsg(descr)
    return 'D' + revision if revision else ''

@templatekeyword('tasks')
def showtasks(**args):
    """String. Return the tasks associated with given hg rev."""
    tasks = []
    descr = args['ctx'].description()
    match = re.search('(Tasks?|Task ID):(.*)', descr)
    if match:
        tasks = re.findall('\d+', match.group(0))
    return templatekw.showlist('task', tasks, args)

@templatekeyword('singlepublicbase')
def singlepublicbase(repo, ctx, templ, **args):
    """String. Return the public base commit hash."""
    base = repo.revs('last(::%d - not public())', ctx.rev())
    if len(base):
        return hex(repo[base.first()].node())
    return ""