root / snf-astakos-app / astakos / im / templatetags / filters.py @ 5841646f
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# Copyright 2011-2012 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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#
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# 1. Redistributions of source code must retain the above
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# copyright notice, this list of conditions and the following
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# disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials
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# provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and
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# documentation are those of the authors and should not be
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# interpreted as representing official policies, either expressed
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# or implied, of GRNET S.A.
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import calendar |
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import datetime |
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import math |
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from collections import defaultdict |
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from django import template |
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from django.core.paginator import Paginator, EmptyPage |
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from django.db.models.query import QuerySet |
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from astakos.im.settings import PAGINATE_BY |
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register = template.Library() |
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DELIM = ','
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@register.filter
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def monthssince(joined_date): |
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now = datetime.datetime.now() |
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date = datetime.datetime( |
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year=joined_date.year, month=joined_date.month, day=1)
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months = [] |
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month = date.month |
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year = date.year |
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timestamp = calendar.timegm(date.utctimetuple()) |
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while date < now:
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months.append((year, month, timestamp)) |
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if date.month < 12: |
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month = date.month + 1
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year = date.year |
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else:
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month = 1
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year = date.year + 1
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date = datetime.datetime(year=year, month=month, day=1)
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timestamp = calendar.timegm(date.utctimetuple()) |
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return months
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@register.filter
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def lookup(d, key): |
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print d, key
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return d.get(key)
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@register.filter
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def lookup_uni(d, key): |
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return d.get(unicode(key)) |
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@register.filter
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def dkeys(d): |
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return d.keys()
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@register.filter
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def month_name(month_number): |
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return calendar.month_name[month_number]
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@register.filter
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def todate(value, arg=''): |
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secs = int(value) / 1000 |
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return datetime.datetime.fromtimestamp(secs)
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@register.filter
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def rcut(value, chars='/'): |
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return value.rstrip(chars)
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@register.filter
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def paginate(l, args): |
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l = l or []
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page, delim, sorting = args.partition(DELIM) |
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if sorting:
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if isinstance(l, QuerySet): |
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l = l.order_by(sorting) |
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elif isinstance(l, list): |
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default = ''
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if sorting.endswith('_date'): |
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default = datetime.datetime.utcfromtimestamp(0)
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l.sort(key=lambda i: getattr(i, sorting) |
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if getattr(i, sorting) else default) |
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paginator = Paginator(l, PAGINATE_BY) |
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try:
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paginator.len |
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except AttributeError: |
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paginator._count = len(list(l)) |
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try:
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page_number = int(page)
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except ValueError: |
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if page == 'last': |
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page_number = paginator.num_pages |
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else:
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page_number = 1
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try:
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page = paginator.page(page_number) |
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except EmptyPage:
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page = paginator.page(1)
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return page
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@register.filter
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def concat(str1, str2): |
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if not str2: |
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return str(str1) |
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return '%s%s%s' % (str1, DELIM, str2) |
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@register.filter
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def items(d): |
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if isinstance(d, defaultdict): |
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return d.iteritems()
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return d
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@register.filter
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def get_value_after_dot(value): |
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return value.split(".")[1] |
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@register.filter
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def strip_http(value): |
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return value.replace('http://','')[:-1] |
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from math import log |
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unit_list = zip(['bytes', 'kB', 'MB', 'GB', 'TB', 'PB'], [0, 0, 0, 0, 0, 0]) |
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@register.filter
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def sizeof_fmt(num): |
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"""Human friendly file size"""
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if math.isinf(num):
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return 'Unlimited' |
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if num > 1: |
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exponent = min(int(log(num, 1024)), len(unit_list) - 1) |
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quotient = float(num) / 1024**exponent |
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unit, num_decimals = unit_list[exponent] |
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format_string = '{0:.%sf} {1}' % (num_decimals)
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return format_string.format(quotient, unit)
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if num == 0: |
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return '0 bytes' |
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if num == 1: |
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return '1 byte' |
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else:
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return '0'; |
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@register.filter
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def isinf(v): |
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if math.isinf(v):
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return 'Unlimited' |
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else:
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return v
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