""" Apache Log Reader.
"""
#
# Copyright (c) 2005 Satoshi Fukutomi <info@fuktommy.com>.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#

import csv
from time import time, localtime, strftime

__all__ = ["read", "read_day", "read_today", "make_day"]

class ApacheDialect(csv.Dialect):
    delimiter = " "
    quotechar = '"'
    lineterminator = "\n"
    doublequote = False
    skipinitialspace = False
    quoting = csv.QUOTE_MINIMAL

def ssv_input(fp):
    for line in fp:
        yield line.replace("[", '"', 1).replace("]", '"', 1)

def apache_log(fp):
    return csv.reader(ssv_input(fp), dialect=ApacheDialect())

def apache_log_day(csvin, day):
    for row in csvin:
        if row[3].startswith(day):
            yield row

def read(fp):
    return apache_log(fp)

def read_day(fp, day):
    return apache_log_day(read(fp), day)

def read_today(fp):
    return read_day(fp, make_day(time()))

def make_day(t):
    return strftime("%d/%b/%Y", localtime(t))