#!/usr/bin/env python

# encoding: utf-8

# changelog controller for pylons

# Copyright (C) 2009-2010 Marcin Kuzminski <marcin@python-works.com>

from json import dumps

from pylons import request, session, tmpl_context as c

from pylons_app.lib.auth import LoginRequired

from pylons_app.lib.base import BaseController, render

from pylons_app.model.hg_model import HgModel

from webhelpers.paginate import Page

import logging

# 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; version 2

# of the License or (at your opinion) any later version of the license.

# 

# 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.

"""

Created on April 21, 2010

changelog controller for pylons

@author: marcink

"""

log = logging.getLogger(__name__)     

class ChangelogController(BaseController):

    @LoginRequired()

    def __before__(self):

        super(ChangelogController, self).__before__()

    def index(self):

        limit = 100

        default = 20

        if request.params.get('size'):

            try:

                int_size = int(request.params.get('size'))

            except ValueError:

                int_size = default

            int_size = int_size if int_size <= limit else limit 

            c.size = int_size

            session['changelog_size'] = c.size

            session.save()

        else:

            c.size = int(session.get('changelog_size', default))

        changesets = HgModel().get_repo(c.repo_name)

        p = int(request.params.get('page', 1))

        c.total_cs = len(changesets)

        c.pagination = Page(changesets, page=p, item_count=c.total_cs,

                            items_per_page=c.size)

        self._graph(changesets, c.size, p)

        return render('changelog/changelog.html')

    def _graph(self, repo, size, p):

        revcount = size

        if not repo.revisions:return dumps([]), 0

        max_rev = repo.revisions[-1]

        offset = 1 if p == 1 else  ((p - 1) * revcount)

        rev_start = repo.revisions[(-1 * offset)]

        revcount = min(max_rev, revcount)

        rev_end = max(0, rev_start - revcount)

        dag = graph_rev(repo.repo, rev_start, rev_end)

        c.dag = tree = list(colored(dag))

        data = []

        for (id, type, ctx, vtx, edges) in tree:

            if type != CHANGESET:

                continue

        c.jsdata = dumps(data)