Synnefo

# Copyright 2011-2012 GRNET S.A. All rights reserved.

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#      disclaimer.

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#      provided with the distribution.

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import calendar

import datetime

from collections import defaultdict

from django import template

from django.core.paginator import Paginator, EmptyPage

from django.db.models.query import QuerySet

from astakos.im.settings import PAGINATE_BY

register = template.Library()

DELIM = ','

@register.filter

def monthssince(joined_date):

    now = datetime.datetime.now()

    date = datetime.datetime(

        year=joined_date.year, month=joined_date.month, day=1)

    months = []

    month = date.month

    year = date.year

    timestamp = calendar.timegm(date.utctimetuple())

    while date < now:

        months.append((year, month, timestamp))

        if date.month < 12:

            month = date.month + 1

            year = date.year

        else:

            month = 1

            year = date.year + 1

        date = datetime.datetime(year=year, month=month, day=1)

        timestamp = calendar.timegm(date.utctimetuple())

    return months

@register.filter

def lookup(d, key):

    return d.get(key)

@register.filter

def dkeys(d):

    return d.keys()

@register.filter

def month_name(month_number):

    return calendar.month_name[month_number]

@register.filter

def todate(value, arg=''):

    secs = int(value) / 1000

    return datetime.datetime.fromtimestamp(secs)

@register.filter

def rcut(value, chars='/'):

    return value.rstrip(chars)

@register.filter

def paginate(l, args):

    page, delim, sorting = args.partition(DELIM)

    if sorting:

        if isinstance(l, QuerySet):

            l = l.order_by(sorting)

        elif isinstance(l, list):

            default = ''

            if sorting.endswith('_date'):

                default = datetime.datetime.utcfromtimestamp(0)

            l.sort(key=lambda i: getattr(i, sorting)

                   if getattr(i, sorting) else default)

    paginator = Paginator(l, PAGINATE_BY)

    try:

        page_number = int(page)

    except ValueError:

        if page == 'last':

            page_number = paginator.num_pages

        else:

            page_number = 1

    try:

        page = paginator.page(page_number)

    except EmptyPage:

        page = paginator.page(1)

    return page

@register.filter

def concat(str1, str2):

    if not str2:

        return str(str1)

    return '%s%s%s' % (str1, DELIM, str2)

@register.filter

def items(d):

    if isinstance(d, defaultdict):

        return d.iteritems()

    return d

@register.filter

def get_value_after_dot(value):

    return value.split(".")[1]