#!/usr/local/Python25/bin/python
# _*_ coding: utf-8 _*_
# Copyright (C)  2007 Ayukawa Hiroshi
from operator import and_
import urllib2
import re

from django.core.cache import cache
from django import template

URLPAT = "http://coderepos.org/share/browser%s?rev=%d&format=txt"

def get_coderepos_src(fname, rev, sline=None, eline=None):
    try:
        rev = int(rev)
        if sline:
            sline = int(sline)
        if eline:
            eline = int(eline)
    except ValueError:
        #引数が数字ではないので
        return None
    if not fname:
        return None

    cachekey = "coderepossrc_%d_%s" % (rev, fname)
    lines = cache.get(cachekey)
    if not lines:
        try:
            up = urllib2.urlopen(URLPAT % (fname, rev))
        except urllib2.URLError, e:
            #エラー時のメッセージ
            return u"(*_*;) 。oO ( CodeRepos returned URL ERROR %d )\nソースコードを取得できませんでした。\n%s" % (e.code, URLPAT % (fname, rev))
        lines = [unicode(l, "utf-8", "ignore") for l in up.readlines()]
        cache.set(cachekey, lines, 7*24*3600)  #1週間保存
        
    if sline or eline:        
        if not eline:
            lines = lines[sline-1:]
        elif not sline:
            lines = lines[:eline]
        else:
            lines = lines[sline-1:eline]
    contents = "".join(lines)
    return contents

TAGPAT = re.compile(ur"\[CODEREPOS:([^:]+):([0-9]+)(?::([0-9]+):([0-9]+))?\]")
def henkan(g):
    return u"<pre>%s</pre>" % get_coderepos_src(g.group(1), g.group(2), g.group(3), g.group(4))
def codereposfilter(value):
    return TAGPAT.sub(henkan, value)

register = template.Library()
register.filter("coderepos", codereposfilter)