X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/f29c8cb6c8bb788fe4dcd93f59dee829d1281c69..HEAD:/src/wolnelektury/utils.py diff --git a/src/wolnelektury/utils.py b/src/wolnelektury/utils.py index 971707030..dfa8522f8 100644 --- a/src/wolnelektury/utils.py +++ b/src/wolnelektury/utils.py @@ -1,27 +1,24 @@ -# -*- coding: utf-8 -*- -# This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later. -# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information. +# This file is part of Wolne Lektury, licensed under GNU Affero GPLv3 or later. +# Copyright © Fundacja Wolne Lektury. See NOTICE for more information. # -import json -import os +import codecs +import csv from functools import wraps - -import pytz from inspect import getargspec +from io import BytesIO +import json +import os +import re +from django.conf import settings +from django.contrib import admin +from django.core.cache import cache +from django.core.mail import send_mail from django.http import HttpResponse -from django.template import RequestContext from django.template.loader import render_to_string -from django.utils import timezone +from django.utils.translation import get_language from django.conf import settings - -tz = pytz.timezone(settings.TIME_ZONE) - - -def localtime_to_utc(localtime): - return timezone.utc.normalize( - tz.localize(localtime) - ) +from django.utils.safestring import mark_safe def utc_for_js(dt): @@ -35,7 +32,7 @@ def makedirs(path): def stringify_keys(dictionary): return dict((keyword.encode('ascii'), value) - for keyword, value in dictionary.iteritems()) + for keyword, value in dictionary.items()) def json_encode(obj, sort_keys=True, ensure_ascii=False): @@ -57,7 +54,7 @@ class AjaxError(Exception): pass -def ajax(login_required=True, method=None, template=None, permission_required=None): +def ajax(login_required=False, method=None, template=None, permission_required=None): def decorator(fun): @wraps(fun) def ajax_view(request): @@ -82,11 +79,11 @@ def ajax(login_required=True, method=None, template=None, permission_required=No if request_params: request_params = dict( (key, json_decode_fallback(value)) - for key, value in request_params.iteritems() + for key, value in request_params.items() if fun_kwargs or key in fun_params) kwargs.update(stringify_keys(request_params)) res = None - if login_required and not request.user.is_authenticated(): + if login_required and not request.user.is_authenticated: res = {'result': 'logout'} if (permission_required and not request.user.has_perm(permission_required)): @@ -95,7 +92,7 @@ def ajax(login_required=True, method=None, template=None, permission_required=No try: res = fun(request, **kwargs) if res and template: - res = {'html': render_to_string(template, res, RequestContext(request))} + res = {'html': render_to_string(template, res, request=request)} except AjaxError as e: res = {'result': e.args[0]} if 'result' not in res: @@ -106,3 +103,103 @@ def ajax(login_required=True, method=None, template=None, permission_required=No return ajax_view return decorator + + +def send_noreply_mail(subject, message, recipient_list, **kwargs): + send_mail( + '[WolneLektury] ' + subject, + message + "\n\n-- \nWiadomość wysłana automatycznie. Prosimy nie odpowiadać.", + 'no-reply@wolnelektury.pl', recipient_list, **kwargs) + + +# source: https://docs.python.org/2/library/csv.html#examples +class UnicodeCSVWriter(object): + """ + A CSV writer which will write rows to CSV file "f", + which is encoded in the given encoding. + """ + + def __init__(self, f, dialect=csv.excel, encoding="utf-8", **kwds): + # Redirect output to a queue + self.queue = BytesIO() + self.writer = csv.writer(self.queue, dialect=dialect, **kwds) + self.stream = f + self.encoder = codecs.getincrementalencoder(encoding)() + + def writerow(self, row): + self.writer.writerow([s.encode("utf-8") for s in row]) + # Fetch UTF-8 output from the queue ... + data = self.queue.getvalue() + data = data.decode("utf-8") + # ... and reencode it into the target encoding + data = self.encoder.encode(data) + # write to the target stream + self.stream.write(data) + # empty queue + self.queue.truncate(0) + + def writerows(self, rows): + for row in rows: + self.writerow(row) + + +# the original re.escape messes with unicode +def re_escape(s): + return re.sub(r"[(){}\[\].*?|^$\\+-]", r"\\\g<0>", s) + + +def get_cached_render_key(instance, property_name, language=None): + if language is None: + language = get_language() + return 'cached_render:%s.%s:%s:%s' % ( + type(instance).__name__, + property_name, + instance.pk, + language + ) + + +def cached_render(template_name, timeout=24 * 60 * 60): + def decorator(method): + @wraps(method) + def wrapper(self): + key = get_cached_render_key(self, method.__name__) + content = cache.get(key) + if content is None: + context = method(self) + content = render_to_string(template_name, context) + cache.set(key, str(content), timeout=timeout) + else: + content = mark_safe(content) + return content + return wrapper + return decorator + + +def clear_cached_renders(bound_method): + for lc, ln in settings.LANGUAGES: + cache.delete( + get_cached_render_key( + bound_method.__self__, + bound_method.__name__, + lc + ) + ) + + +class YesNoFilter(admin.SimpleListFilter): + def lookups(self, request, model_admin): + return ( + ('yes', 'Tak'), + ('no', 'Nie'), + ) + + def queryset(self, request, queryset): + if self.value() == 'yes': + return queryset.filter(self.q) + elif self.value() == 'no': + return queryset.exclude(self.q) + + +def is_ajax(request): + return request.headers.get('x-requested-with') == 'XMLHttpRequest'