--- /dev/null
+# -*- 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.
+#
+from functools import wraps
+
+from django.http import (HttpResponse, HttpResponseRedirect,
+ HttpResponseForbidden)
+from django.shortcuts import render_to_response
+from django.template import RequestContext
+from django.utils.encoding import force_unicode
+from django.utils.functional import Promise
+from django.utils.http import urlquote_plus
+import json
+from django.utils.translation import ugettext_lazy as _
+from django.views.decorators.vary import vary_on_headers
+from honeypot.decorators import verify_honeypot_value
+
+
+class LazyEncoder(json.JSONEncoder):
+ def default(self, obj):
+ if isinstance(obj, Promise):
+ return force_unicode(obj)
+ return obj
+
+
+def method_decorator(function_decorator):
+ """Converts a function decorator to a method decorator.
+
+ It just makes it ignore first argument.
+ """
+ def decorator(method):
+ @wraps(method)
+ def wrapped_method(self, *args, **kwargs):
+ def function(*fargs, **fkwargs):
+ return method(self, *fargs, **fkwargs)
+ return function_decorator(function)(*args, **kwargs)
+ return wrapped_method
+ return decorator
+
+
+def require_login(request):
+ """Return 403 if request is AJAX. Redirect to login page if not."""
+ if request.is_ajax():
+ return HttpResponseForbidden('Not logged in')
+ else:
+ return HttpResponseRedirect('/uzytkownicy/zaloguj')# next?=request.build_full_path())
+
+
+def placeholdized(form):
+ for field in form.fields.values():
+ field.widget.attrs['placeholder'] = field.label
+ return form
+
+
+class AjaxableFormView(object):
+ """Subclass this to create an ajaxable view for any form.
+
+ In the subclass, provide at least form_class.
+
+ """
+ form_class = None
+ placeholdize = False
+ # override to customize form look
+ template = "ajaxable/form.html"
+ submit = _('Send')
+
+ title = ''
+ success_message = ''
+ POST_login = False
+ formname = "form"
+ form_prefix = None
+ full_template = "ajaxable/form_on_page.html"
+ honeypot = False
+
+ @method_decorator(vary_on_headers('X-Requested-With'))
+ def __call__(self, request, *args, **kwargs):
+ """A view displaying a form, or JSON if request is AJAX."""
+ obj = self.get_object(request, *args, **kwargs)
+ form_args, form_kwargs = self.form_args(request, obj)
+ if self.form_prefix:
+ form_kwargs['prefix'] = self.form_prefix
+
+ if request.method == "POST":
+ if self.honeypot:
+ response = verify_honeypot_value(request, None)
+ if response:
+ return response
+
+ # do I need to be logged in?
+ if self.POST_login and not request.user.is_authenticated():
+ return require_login(request)
+
+ form_kwargs['data'] = request.POST
+ form = self.form_class(*form_args, **form_kwargs)
+ if form.is_valid():
+ add_args = self.success(form, request)
+ response_data = {
+ 'success': True,
+ 'message': self.success_message,
+ 'redirect': request.GET.get('next')
+ }
+ if add_args:
+ response_data.update(add_args)
+ if not request.is_ajax() and response_data['redirect']:
+ return HttpResponseRedirect(urlquote_plus(
+ response_data['redirect'], safe='/?=&'))
+ elif request.is_ajax():
+ # Form was sent with errors. Send them back.
+ if self.form_prefix:
+ errors = {}
+ for key, value in form.errors.items():
+ errors["%s-%s" % (self.form_prefix, key)] = value
+ else:
+ errors = form.errors
+ response_data = {'success': False, 'errors': errors}
+ else:
+ response_data = None
+ if request.is_ajax():
+ return HttpResponse(LazyEncoder(ensure_ascii=False).encode(response_data))
+ else:
+ if (self.POST_login and not request.user.is_authenticated()
+ and not request.is_ajax()):
+ return require_login(request)
+
+ form = self.form_class(*form_args, **form_kwargs)
+ response_data = None
+
+ title = self.title
+ if request.is_ajax():
+ template = self.template
+ else:
+ template = self.full_template
+ cd = self.context_description(request, obj)
+ if cd:
+ title += ": " + cd
+ if self.placeholdize:
+ form = placeholdized(form)
+ context = {
+ self.formname: form,
+ "title": title,
+ "honeypot": self.honeypot,
+ "placeholdize": self.placeholdize,
+ "submit": self.submit,
+ "response_data": response_data,
+ "ajax_template": self.template,
+ "view_args": args,
+ "view_kwargs": kwargs,
+ }
+ context.update(self.extra_context(request, obj))
+ return render_to_response(template, context,
+ context_instance=RequestContext(request))
+
+ def redirect_or_refresh(self, request, path, message=None):
+ """If the form is AJAX, refresh the page. If not, go to `path`."""
+ if request.is_ajax():
+ output = "<script>window.location.reload()</script>"
+ if message:
+ output = "<div class='normal-text'>" + message + "</div>" + output
+ return HttpResponse(output)
+ else:
+ return HttpResponseRedirect(path)
+
+ def get_object(self, request, *args, **kwargs):
+ """Override to parse view args and get some associated data."""
+ return None
+
+ def form_args(self, request, obj):
+ """Override to parse view args and give additional args to the form."""
+ return (), {}
+
+ def extra_context(self, request, obj):
+ """Override to pass something to template."""
+ return {}
+
+ def context_description(self, request, obj):
+ """Description to appear in standalone form, but not in AJAX form."""
+ return ""
+
+ def success(self, form, request):
+ """What to do when the form is valid.
+
+ By default, just save the form.
+
+ """
+ return form.save(request)
fnp / wolnelektury.git / blobdiff