# This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
#
-from __future__ import with_statement
-
+from collections import defaultdict
+import hashlib
import random
import re
import time
from django.core.files.uploadedfile import UploadedFile
from django.core.files.storage import DefaultStorage
from django.utils.encoding import force_unicode
-from django.utils.hashcompat import sha_constructor
from django.conf import settings
from os import mkdir, path, unlink
from errno import EEXIST, ENOENT
def get_random_hash(seed):
- sha_digest = sha_constructor('%s%s%s%s' %
+ sha_digest = hashlib.sha1('%s%s%s%s' %
(randrange(0, MAX_SESSION_KEY), time.time(), unicode(seed).encode('utf-8', 'replace'),
settings.SECRET_KEY)).digest()
return urlsafe_b64encode(sha_digest).replace('=', '').replace('_', '-').lower()
-def split_tags(tags):
- result = {}
- for tag in tags:
- result.setdefault(tag.category, []).append(tag)
+def split_tags(*tag_lists):
+ if len(tag_lists) == 1:
+ result = defaultdict(list)
+ for tag in tag_lists[0]:
+ result[tag.category].append(tag)
+ else:
+ result = defaultdict(dict)
+ for tag_list in tag_lists:
+ for tag in tag_list:
+ try:
+ result[tag.category][tag.pk].count += tag.count
+ except KeyError:
+ result[tag.category][tag.pk] = tag
+ for k, v in result.items():
+ result[k] = sorted(v.values(), key=lambda tag: tag.sort_key)
return result
try:
unlink(self.lockname)
except OSError as oe:
- if oe.errno != oe.EEXIST:
+ if oe.errno != EEXIST:
raise oe
self.lock.close()
class AttachmentHttpResponse(HttpResponse):
"""Response serving a file to be downloaded.
"""
- def __init__ (self, file_path, file_name, mimetype):
+ def __init__(self, file_path, file_name, mimetype):
super(AttachmentHttpResponse, self).__init__(mimetype=mimetype)
self['Content-Disposition'] = 'attachment; filename=%s' % file_name
self.file_path = file_path
def __init__(self, *args, **kwargs):
self.querysets = args
self._count = None
-
+
def count(self):
if not self._count:
self._count = sum(len(qs) for qs in self.querysets)
return self._count
-
+
def __len__(self):
return self.count()
-
+
def __getitem__(self, item):
try:
- indices = (offset, stop, step) = item.indices(self.count())
+ (offset, stop, step) = item.indices(self.count())
except AttributeError:
# it's not a slice - make it one
return self[item : item + 1][0]
stop = total_len - len(items)
continue
+class SortedMultiQuerySet(MultiQuerySet):
+ def __init__(self, *args, **kwargs):
+ self.order_by = kwargs.pop('order_by', None)
+ self.sortfn = kwargs.pop('sortfn', None)
+ if self.order_by is not None:
+ self.sortfn = lambda a, b: cmp((getattr(a, f) for f in self.order_by),
+ (getattr(b, f) for f in self.order_by))
+ super(SortedMultiQuerySet, self).__init__(*args, **kwargs)
+
+ def __getitem__(self, item):
+ sort_heads = [0] * len(self.querysets)
+ try:
+ (offset, stop, step) = item.indices(self.count())
+ except AttributeError:
+ # it's not a slice - make it one
+ return self[item : item + 1][0]
+ items = []
+ total_len = stop - offset
+ skipped = 0
+ i_s = range(len(sort_heads))
+
+ while len(items) < total_len:
+ candidate = None
+ candidate_i = None
+ for i in i_s:
+ def get_next():
+ return self.querysets[i][sort_heads[i]]
+ try:
+ if candidate is None:
+ candidate = get_next()
+ candidate_i = i
+ else:
+ competitor = get_next()
+ if self.sortfn(candidate, competitor) > 0:
+ candidate = competitor
+ candidate_i = i
+ except IndexError:
+ continue # continue next sort_head
+ # we have no more elements:
+ if candidate is None:
+ break
+ sort_heads[candidate_i] += 1
+ if skipped < offset:
+ skipped += 1
+ continue # continue next item
+ items.append(candidate)
+
+ return items
+
def truncate_html_words(s, num, end_text='...'):
"""Truncates HTML to a certain number of words (not counting tags and
"""
from waiter.utils import clear_cache
clear_cache('book/%s' % book.slug)
+
+
+class AppSettings(object):
+ """Allows specyfying custom settings for an app, with default values.
+
+ Just subclass, set some properties and instantiate with a prefix.
+ Getting a SETTING from an instance will check for prefix_SETTING
+ in project settings if set, else take the default. The value will be
+ then filtered through _more_SETTING method, if there is one.
+
+ """
+ def __init__(self, prefix):
+ self._prefix = prefix
+
+ def __getattribute__(self, name):
+ if name.startswith('_'):
+ return object.__getattribute__(self, name)
+ value = getattr(settings,
+ "%s_%s" % (self._prefix, name),
+ object.__getattribute__(self, name))
+ more = "_more_%s" % name
+ if hasattr(self, more):
+ value = getattr(self, more)(value)
+ return value
+
+
+def trim_query_log(trim_to=25):
+ """
+connection.queries includes all SQL statements -- INSERTs, UPDATES, SELECTs, etc. Each time your app hits the database, the query will be recorded.
+This can sometimes occupy lots of memory, so trim it here a bit.
+ """
+ if settings.DEBUG:
+ from django.db import connection
+ connection.queries = trim_to > 0 \
+ and connection.queries[-trim_to:] \
+ or []
+
+
+def delete_from_cache_by_language(cache, key_template):
+ cache.delete_many([key_template % lc for lc, ln in settings.LANGUAGES])
fnp / wolnelektury.git / blobdiff