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# Copyright (c) 2011, 2012 Free Software Foundation
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""Template tags and filters for Gstudio"""
from hashlib import md5
from random import sample
from urllib import urlencode
from datetime import datetime
from django.db.models import Q
from django.db import connection
from django.template import Node
from django.template import Library
from django.template import TemplateSyntaxError
from django.contrib.comments.models import CommentFlag
from django.contrib.contenttypes.models import ContentType
from django.utils.encoding import smart_unicode
from django.contrib.comments import get_model as get_comment_model
from tagging.models import Tag
from tagging.utils import calculate_cloud
from gstudio.models import Nodetype
from gstudio.models import Author
from gstudio.models import Metatype
from gstudio.gnowql import get_node
from gstudio.managers import tags_published
from gstudio.comparison import VectorBuilder
from gstudio.comparison import pearson_score
from gstudio.templatetags.zcalendar import GstudioCalendar
from gstudio.templatetags.zbreadcrumbs import retrieve_breadcrumbs
register = Library()
VECTORS = None
VECTORS_FACTORY = lambda: VectorBuilder(Nodetype.published.all(),
['title', 'excerpt', 'content'])
CACHE_NODETYPES_RELATED = {}
@register.inclusion_tag('gstudio/tags/dummy.html')
def get_metatypes(template='gstudio/tags/metatypes.html'):
"""Return the metatypes"""
return {'template': template,
'metatypes': Metatype.tree.all()}
#@register.inclusion_tag('gstudio/tags/dummy.html')
#def get_subtypes(template='gstudio/tags/nodetypes.html'):
# """Return the subtypes"""
# return {'template': template,
# 'subtypes': Nodetype.tree.all()}
@register.inclusion_tag('gstudio/tags/dummy.html')
def get_authors(template='gstudio/tags/authors.html'):
"""Return the published authors"""
return {'template': template,
'authors': Author.published.all()}
@register.inclusion_tag('gstudio/tags/dummy.html')
def get_recent_nodetypes(number=5, template='gstudio/tags/recent_nodetypes.html'):
"""Return the most recent nodetypes"""
return {'template': template,
'nodetypes': Nodetype.published.all()[:number]}
@register.inclusion_tag('gstudio/tags/dummy.html')
def get_featured_nodetypes(number=5,
template='gstudio/tags/featured_nodetypes.html'):
"""Return the featured nodetypes"""
return {'template': template,
'nodetypes': Nodetype.published.filter(featured=True)[:number]}
@register.inclusion_tag('gstudio/tags/dummy.html')
def get_random_nodetypes(number=5, template='gstudio/tags/random_nodetypes.html'):
"""Return random nodetypes"""
nodetypes = Nodetype.published.all()
if number > len(nodetypes):
number = len(nodetypes)
return {'template': template,
'nodetypes': sample(nodetypes, number)}
@register.inclusion_tag('gstudio/tags/dummy.html')
def get_popular_nodetypes(number=5, template='gstudio/tags/popular_nodetypes.html'):
"""Return popular nodetypes"""
ctype = ContentType.objects.get_for_model(Nodetype)
query = """SELECT object_pk, COUNT(*) AS score
FROM %s
WHERE content_type_id = %%s
AND is_public = '1'
GROUP BY object_pk
ORDER BY score DESC""" % get_comment_model()._meta.db_table
cursor = connection.cursor()
cursor.execute(query, [ctype.id])
object_ids = [int(row[0]) for row in cursor.fetchall()]
# Use ``in_bulk`` here instead of an ``id__in`` filter, because ``id__in``
# would clobber the ordering.
object_dict = Nodetype.published.in_bulk(object_ids)
return {'template': template,
'nodetypes': [object_dict[object_id]
for object_id in object_ids
if object_id in object_dict][:number]}
@register.inclusion_tag('gstudio/tags/dummy.html', takes_context=True)
def get_similar_nodetypes(context, number=5,
template='gstudio/tags/similar_nodetypes.html',
flush=False):
"""Return similar nodetypes"""
global VECTORS
global CACHE_NODETYPES_RELATED
if VECTORS is None or flush:
VECTORS = VECTORS_FACTORY()
CACHE_NODETYPES_RELATED = {}
def compute_related(object_id, dataset):
"""Compute related nodetypes to a nodetype with a dataset"""
object_vector = None
for nodetype, e_vector in dataset.items():
if nodetype.pk == object_id:
object_vector = e_vector
if not object_vector:
return []
nodetype_related = {}
for nodetype, e_vector in dataset.items():
if nodetype.pk != object_id:
score = pearson_score(object_vector, e_vector)
if score:
nodetype_related[nodetype] = score
related = sorted(nodetype_related.items(), key=lambda(k, v): (v, k))
return [rel[0] for rel in related]
object_id = context['object'].pk
columns, dataset = VECTORS()
key = '%s-%s' % (object_id, VECTORS.key)
if not key in CACHE_NODETYPES_RELATED.keys():
CACHE_NODETYPES_RELATED[key] = compute_related(object_id, dataset)
nodetypes = CACHE_NODETYPES_RELATED[key][:number]
return {'template': template,
'nodetypes': nodetypes}
@register.inclusion_tag('gstudio/tags/dummy.html')
def get_archives_nodetypes(template='gstudio/tags/archives_nodetypes.html'):
"""Return archives nodetypes"""
return {'template': template,
'archives': Nodetype.published.dates('creation_date', 'month',
order='DESC')}
@register.inclusion_tag('gstudio/tags/dummy.html')
def get_archives_nodetypes_tree(
template='gstudio/tags/archives_nodetypes_tree.html'):
"""Return archives nodetypes as a Tree"""
return {'template': template,
'archives': Nodetype.published.dates('creation_date', 'day',
order='ASC')}
@register.inclusion_tag('gstudio/tags/dummy.html', takes_context=True)
def get_calendar_nodetypes(context, year=None, month=None,
template='gstudio/tags/calendar.html'):
"""Return an HTML calendar of nodetypes"""
if not year or not month:
date_month = context.get('month') or context.get('day') or \
getattr(context.get('object'), 'creation_date', None) or \
datetime.today()
year, month = date_month.timetuple()[:2]
calendar = GstudioCalendar()
current_month = datetime(year, month, 1)
dates = list(Nodetype.published.dates('creation_date', 'month'))
if not current_month in dates:
dates.append(current_month)
dates.sort()
index = dates.index(current_month)
previous_month = index > 0 and dates[index - 1] or None
next_month = index != len(dates) - 1 and dates[index + 1] or None
return {'template': template,
'next_month': next_month,
'previous_month': previous_month,
'calendar': calendar.formatmonth(year, month)}
@register.inclusion_tag('gstudio/tags/dummy.html')
def get_recent_comments(number=5, template='gstudio/tags/recent_comments.html'):
"""Return the most recent comments"""
# Using map(smart_unicode... fix bug related to issue #8554
nodetype_published_pks = map(smart_unicode,
Nodetype.published.values_list('id', flat=True))
content_type = ContentType.objects.get_for_model(Nodetype)
comments = get_comment_model().objects.filter(
Q(flags=None) | Q(flags__flag=CommentFlag.MODERATOR_APPROVAL),
content_type=content_type, object_pk__in=nodetype_published_pks,
is_public=True).order_by('-submit_date')[:number]
return {'template': template,
'comments': comments}
@register.inclusion_tag('gstudio/tags/dummy.html')
def get_recent_linkbacks(number=5,
template='gstudio/tags/recent_linkbacks.html'):
"""Return the most recent linkbacks"""
nodetype_published_pks = map(smart_unicode,
Nodetype.published.values_list('id', flat=True))
content_type = ContentType.objects.get_for_model(Nodetype)
linkbacks = get_comment_model().objects.filter(
content_type=content_type,
object_pk__in=nodetype_published_pks,
flags__flag__in=['pingback', 'trackback'],
is_public=True).order_by(
'-submit_date')[:number]
return {'template': template,
'linkbacks': linkbacks}
@register.inclusion_tag('gstudio/tags/dummy.html', takes_context=True)
def gstudio_pagination(context, page, begin_pages=3, end_pages=3,
before_pages=2, after_pages=2,
template='gstudio/tags/pagination.html'):
"""Return a Digg-like pagination, by splitting long list of page
into 3 blocks of pages"""
GET_string = ''
for key, value in context['request'].GET.items():
if key != 'page':
GET_string += '&%s=%s' % (key, value)
begin = page.paginator.page_range[:begin_pages]
end = page.paginator.page_range[-end_pages:]
middle = page.paginator.page_range[max(page.number - before_pages - 1, 0):
page.number + after_pages]
if set(begin) & set(end): # [1, 2, 3], [...], [2, 3, 4]
begin = sorted(set(begin + end)) # [1, 2, 3, 4]
middle, end = [], []
elif begin[-1] + 1 == end[0]: # [1, 2, 3], [...], [4, 5, 6]
begin += end # [1, 2, 3, 4, 5, 6]
middle, end = [], []
elif set(begin) & set(middle): # [1, 2, 3], [2, 3, 4], [...]
begin = sorted(set(begin + middle)) # [1, 2, 3, 4]
middle = []
elif begin[-1] + 1 == middle[0]: # [1, 2, 3], [4, 5, 6], [...]
begin += middle # [1, 2, 3, 4, 5, 6]
middle = []
elif middle[-1] + 1 == end[0]: # [...], [15, 16, 17], [18, 19, 20]
end = middle + end # [15, 16, 17, 18, 19, 20]
middle = []
elif set(middle) & set(end): # [...], [17, 18, 19], [18, 19, 20]
end = sorted(set(middle + end)) # [17, 18, 19, 20]
middle = []
return {'template': template, 'page': page, 'GET_string': GET_string,
'begin': begin, 'middle': middle, 'end': end}
@register.inclusion_tag('gstudio/tags/dummy.html', takes_context=True)
def gstudio_breadcrumbs(context, separator='/', root_name='Nodetype',
template='gstudio/tags/breadcrumbs.html',):
"""Return a breadcrumb for the application"""
path = context['request'].path
page_object = context.get('object') or context.get('metatype') or \
context.get('tag') or context.get('author')
breadcrumbs = retrieve_breadcrumbs(path, page_object, root_name)
return {'template': template,
'separator': separator,
'breadcrumbs': breadcrumbs}
@register.simple_tag
def get_gravatar(email, size=80, rating='g', default=None):
"""Return url for a Gravatar"""
url = 'http://www.gravatar.com/avatar/%s.jpg' % \
md5(email.strip().lower()).hexdigest()
options = {'s': size, 'r': rating}
if default:
options['d'] = default
url = '%s?%s' % (url, urlencode(options))
return url.replace('&', '&')
@register.simple_tag
def get_type(name):
"""Return the type of node"""
return get_node(name)
class TagsNode(Node):
def __init__(self, context_var):
self.context_var = context_var
def render(self, context):
context[self.context_var] = tags_published()
return ''
@register.tag
def get_tags(parser, token):
"""{% get_tags as var %}"""
bits = token.split_contents()
if len(bits) != 3:
raise TemplateSyntaxError(
'get_tags tag takes exactly two arguments')
if bits[1] != 'as':
raise TemplateSyntaxError(
"first argument to get_tags tag must be 'as'")
return TagsNode(bits[2])
@register.inclusion_tag('gstudio/tags/dummy.html')
def get_tag_cloud(steps=6, template='gstudio/tags/tag_cloud.html'):
"""Return a cloud of published tags"""
tags = Tag.objects.usage_for_queryset(
Nodetype.published.all(), counts=True)
return {'template': template,
'tags': calculate_cloud(tags, steps)}
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