# This file is part of Buildbot.  Buildbot 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, version 2.
#
# 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, write to the Free Software Foundation, Inc., 51
# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Copyright Buildbot Team Members
#
# code inspired/copied from contrib/github_buildbot
#  and inspired from code from the Chromium project
# otherwise, Andrew Melo <andrew.melo@gmail.com> wrote the rest
# but "the rest" is pretty minimal
from buildbot.util import json


def getChanges(request, options=None):
    """
    Consumes a naive build notification (the default for now)
    basically, set POST variables to match commit object parameters:
    revision, revlink, comments, branch, who, files, links

    files, links and properties will be de-json'd, the rest are interpreted as strings
    """

    def firstOrNothing(value):
        """
        Small helper function to return the first value (if value is a list)
        or return the whole thing otherwise
        """
        if (isinstance(value, type([]))):
            return value[0]
        else:
            return value

    args = request.args

    # first, convert files, links and properties
    files = None
    if args.get('files'):
        files = json.loads(args.get('files')[0])
    else:
        files = []

    properties = None
    if args.get('properties'):
        properties = json.loads(args.get('properties')[0])
    else:
        properties = {}

    revision = firstOrNothing(args.get('revision'))
    when = firstOrNothing(args.get('when'))
    if when is not None:
        when = float(when)
    author = firstOrNothing(args.get('author'))
    if not author:
        author = firstOrNothing(args.get('who'))
    comments = firstOrNothing(args.get('comments')).decode('utf-8')
    branch = firstOrNothing(args.get('branch'))
    category = firstOrNothing(args.get('category'))
    revlink = firstOrNothing(args.get('revlink'))
    repository = firstOrNothing(args.get('repository'))
    project = firstOrNothing(args.get('project'))
    codebase = firstOrNothing(args.get('codebase'))

    chdict = dict(author=author, files=files, comments=comments,
                  revision=revision, when=when,
                  branch=branch, category=category, revlink=revlink,
                  properties=properties, repository=repository,
                  project=project, codebase=codebase)
    return ([chdict], None)
