Synnefo

# Copyright 2011-2012 GRNET S.A. 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 GRNET S.A. ``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 GRNET S.A OR

# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

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# 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.

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# The views and conclusions contained in the software and

# documentation are those of the authors and should not be

# interpreted as representing official policies, either expressed

# or implied, of GRNET S.A.

import calendar

import datetime

import math

from collections import defaultdict

from django import template

from django.core.paginator import Paginator, EmptyPage

from django.db.models.query import QuerySet

from synnefo.lib.ordereddict import OrderedDict

from astakos.im import settings

from astakos.im.models import ProjectResourceGrant

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 to_unicode(s):

    return unicode(s)

@register.filter

def to_string(s):

    return str(s)

@register.filter

def lookup(d, key):

    try:

        return d.get(key)

    except:

        return

@register.filter

def lookup_uni(d, key):

    return d.get(unicode(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):

    l = l or []

    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, settings.PAGINATE_BY)

    try:

        paginator.len

    except AttributeError:

        paginator._count = len(list(l))

    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]

# @register.filter

# def strip_http(value):

#     return value.replace('http://','')[:-1]

from math import log

unit_list = zip(['bytes', 'kB', 'MB', 'GB', 'TB', 'PB'], [0, 0, 0, 0, 0, 0])

@register.filter

def sizeof_fmt(num):

    """Human friendly file size"""

    return ProjectResourceGrant.display_filesize(num)

@register.filter

def truncatename(v, max=18, append="..."):

    length = len(v)

    if length > max:

        return v[:max] + append

    else:

        return v

@register.filter

def resource_groups(project_definition):

    try:

        grants = project_definition.projectresourcegrant_set

        return grants.values_list('resource__group', flat=True)

    except:

        return ()

@register.filter

def resource_grants(project_definition):

    try:

        grants = project_definition.projectresourcegrant_set

        grants = grants.values_list(

            'resource__name',

            'member_capacity'

        )

        return dict((e[0], e[1]) for e in grants)

    except:

        return {}