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[osqa.git] / forum / views / writers.py
1 # encoding:utf-8
2 import os.path
3 import time, datetime, random
4 import logging
5 from django.core.files.storage import FileSystemStorage
6 from django.shortcuts import render_to_response, get_object_or_404
7 from django.http import HttpResponseRedirect, HttpResponse, Http404
8 from django.template import RequestContext
9 from django.utils.html import *
10 from django.utils import simplejson
11 from django.utils.translation import ugettext as _
12 from django.core.urlresolvers import reverse
13 from django.core.exceptions import PermissionDenied
14
15 from forum.actions import AskAction, AnswerAction, ReviseAction, RollbackAction, RetagAction
16 from forum.forms import *
17 from forum.models import *
18 from forum.forms import get_next_url
19 from forum.utils import html
20
21
22 def upload(request):#ajax upload file to a question or answer
23     class FileTypeNotAllow(Exception):
24         pass
25     class FileSizeNotAllow(Exception):
26         pass
27     class UploadPermissionNotAuthorized(Exception):
28         pass
29
30     xml_template = "<result><msg><![CDATA[%s]]></msg><error><![CDATA[%s]]></error><file_url>%s</file_url></result>"
31
32     try:
33         f = request.FILES['file-upload']
34         # check upload permission
35         if not request.user.can_upload_files():
36             raise UploadPermissionNotAuthorized()
37
38         # check file type
39         try:
40             file_name_suffix = os.path.splitext(f.name)[1].lower()
41         except KeyError:
42             raise FileTypeNotAllow()
43
44         if not file_name_suffix in ('.jpg', '.jpeg', '.gif', '.png', '.bmp', '.tiff', '.ico'):
45             raise FileTypeNotAllow()
46
47         storage = FileSystemStorage(str(settings.UPFILES_FOLDER), str(settings.UPFILES_ALIAS))
48         new_file_name = storage.save("_".join(f.name.split()), f)
49         # check file size
50         # byte
51         size = storage.size(new_file_name)
52
53         if size > float(settings.ALLOW_MAX_FILE_SIZE) * 1024 * 1024:
54             storage.delete(new_file_name)
55             raise FileSizeNotAllow()
56
57         result = xml_template % ('Good', '', str(settings.UPFILES_ALIAS) + new_file_name)
58     except UploadPermissionNotAuthorized:
59         result = xml_template % ('', _('uploading images is limited to users with >60 reputation points'), '')
60     except FileTypeNotAllow:
61         result = xml_template % ('', _("allowed file types are 'jpg', 'jpeg', 'gif', 'bmp', 'png', 'tiff'"), '')
62     except FileSizeNotAllow:
63         result = xml_template % ('', _("maximum upload file size is %sM") % settings.ALLOW_MAX_FILE_SIZE, '')
64     except Exception, e:
65         result = xml_template % ('', _('Error uploading file. Please contact the site administrator. Thank you. %s' % e), '')
66
67     return HttpResponse(result, mimetype="application/xml")
68
69 def ask(request):
70     form = None
71
72     if request.POST:
73         if request.session.pop('reviewing_pending_data', False):
74             form = AskForm(initial=request.POST, user=request.user)
75         elif "text" in request.POST:
76             form = AskForm(request.POST, user=request.user)
77             if form.is_valid():
78                 if request.user.is_authenticated() and request.user.email_valid_and_can_ask():
79                     ask_action = AskAction(user=request.user, ip=request.META['REMOTE_ADDR']).save(data=form.cleaned_data)
80                     question = ask_action.node
81
82                     if settings.WIKI_ON and request.POST.get('wiki', False):
83                         question.nstate.wiki = ask_action
84
85                     return HttpResponseRedirect(question.get_absolute_url())
86                 else:
87                     request.session['pending_submission_data'] = {
88                         'POST': request.POST,
89                         'data_name': _("question"),
90                         'type': 'ask',
91                         'submission_url': reverse('ask'),
92                         'time': datetime.datetime.now()
93                     }
94
95                     if request.user.is_authenticated():
96                         request.user.message_set.create(message=_("Your question is pending until you %s.") % html.hyperlink(
97                             reverse('send_validation_email'), _("validate your email")
98                         ))
99                         return HttpResponseRedirect(reverse('index'))
100                     else:
101                         return HttpResponseRedirect(reverse('auth_signin'))
102         elif "go" in request.POST:
103             form = AskForm({'title': request.POST['q']}, user=request.user)
104             
105     if not form:
106         form = AskForm(user=request.user)
107
108     return render_to_response('ask.html', {
109         'form' : form,
110         'tab' : 'ask'
111         }, context_instance=RequestContext(request))
112
113 def edit_question(request, id):
114     question = get_object_or_404(Question, id=id)
115     if question.nis.deleted and not request.user.can_view_deleted_post(question):
116         raise Http404
117     if request.user.can_edit_post(question):
118         return _edit_question(request, question)
119     elif request.user.can_retag_questions():
120         return _retag_question(request, question)
121     else:
122         raise Http404
123
124 def _retag_question(request, question):
125     if request.method == 'POST':
126         form = RetagQuestionForm(question, request.POST)
127         if form.is_valid():
128             if form.has_changed():
129                 RetagAction(user=request.user, node=question, ip=request.META['REMOTE_ADDR']).save(data=dict(tagnames=form.cleaned_data['tags']))
130
131             return HttpResponseRedirect(question.get_absolute_url())
132     else:
133         form = RetagQuestionForm(question)
134     return render_to_response('question_retag.html', {
135         'question': question,
136         'form' : form,
137         #'tags' : _get_tags_cache_json(),
138     }, context_instance=RequestContext(request))
139
140 def _edit_question(request, question):
141     if request.method == 'POST':
142         revision_form = RevisionForm(question, data=request.POST)
143         revision_form.is_valid()
144         revision = question.revisions.get(revision=revision_form.cleaned_data['revision'])
145
146         if 'select_revision' in request.POST:
147             form = EditQuestionForm(question, request.user, revision)
148         else:
149             form = EditQuestionForm(question, request.user, revision, data=request.POST)
150
151         if not 'select_revision' in request.POST and form.is_valid():
152             if form.has_changed():
153                 action = ReviseAction(user=request.user, node=question, ip=request.META['REMOTE_ADDR']).save(data=form.cleaned_data)
154
155                 if settings.WIKI_ON:
156                     if request.POST.get('wiki', False) and not question.nis.wiki:
157                         question.nstate.wiki = action
158                     elif question.nis.wiki and (not request.POST.get('wiki', False)) and request.user.can_cancel_wiki(question):
159                         question.nstate.wiki = None
160             else:
161                 if not revision == question.active_revision:
162                     RollbackAction(user=request.user, node=question).save(data=dict(activate=revision))
163
164             return HttpResponseRedirect(question.get_absolute_url())
165     else:
166         revision_form = RevisionForm(question)
167         form = EditQuestionForm(question, request.user)
168
169     return render_to_response('question_edit.html', {
170         'question': question,
171         'revision_form': revision_form,
172         'form' : form,
173         #'tags' : _get_tags_cache_json()
174     }, context_instance=RequestContext(request))
175
176 def edit_answer(request, id):
177     answer = get_object_or_404(Answer, id=id)
178     if answer.deleted and not request.user.can_view_deleted_post(answer):
179         raise Http404
180     elif not request.user.can_edit_post(answer):
181         raise Http404
182
183     if request.method == "POST":
184         revision_form = RevisionForm(answer, data=request.POST)
185         revision_form.is_valid()
186         revision = answer.revisions.get(revision=revision_form.cleaned_data['revision'])
187
188         if 'select_revision' in request.POST:
189             form = EditAnswerForm(answer, request.user, revision)
190         else:
191             form = EditAnswerForm(answer, request.user, revision, data=request.POST)
192
193         if not 'select_revision' in request.POST and form.is_valid():
194             if form.has_changed():
195                 action = ReviseAction(user=request.user, node=answer, ip=request.META['REMOTE_ADDR']).save(data=form.cleaned_data)
196
197                 if settings.WIKI_ON:
198                     if request.POST.get('wiki', False) and not answer.nis.wiki:
199                         answer.nstate.wiki = action
200                     elif answer.nis.wiki and (not request.POST.get('wiki', False)) and request.user.can_cancel_wiki(answer):
201                         answer.nstate.wiki = None
202             else:
203                 if not revision == answer.active_revision:
204                     RollbackAction(user=request.user, node=answer, ip=request.META['REMOTE_ADDR']).save(data=dict(activate=revision))
205
206             return HttpResponseRedirect(answer.get_absolute_url())
207
208     else:
209         revision_form = RevisionForm(answer)
210         form = EditAnswerForm(answer, request.user)
211     return render_to_response('answer_edit.html', {
212                               'answer': answer,
213                               'revision_form': revision_form,
214                               'form': form,
215                               }, context_instance=RequestContext(request))
216
217 def answer(request, id):
218     question = get_object_or_404(Question, id=id)
219
220     if request.POST:
221         form = AnswerForm(question, request.POST)
222
223         if request.session.pop('reviewing_pending_data', False) or not form.is_valid():
224             request.session['redirect_POST_data'] = request.POST
225             return HttpResponseRedirect(question.get_absolute_url() + '#fmanswer')
226
227         if request.user.is_authenticated() and request.user.email_valid_and_can_answer():
228             answer_action = AnswerAction(user=request.user, ip=request.META['REMOTE_ADDR']).save(dict(question=question, **form.cleaned_data))
229             answer = answer_action.node
230
231             if settings.WIKI_ON and request.POST.get('wiki', False):
232                 answer.nstate.wiki = answer_action
233
234             return HttpResponseRedirect(answer.get_absolute_url())
235         else:
236             request.session['pending_submission_data'] = {
237                 'POST': request.POST,
238                 'data_name': _("answer"),
239                 'type': 'answer',
240                 'submission_url': reverse('answer', kwargs={'id': id}),
241                 'time': datetime.datetime.now()
242             }
243
244             if request.user.is_authenticated():
245                 request.user.message_set.create(message=_("Your answer is pending until you %s.") % html.hyperlink(
246                     reverse('send_validation_email'), _("validate your email")
247                 ))
248                 return HttpResponseRedirect(question.get_absolute_url())
249             else:
250                 return HttpResponseRedirect(reverse('auth_signin'))
251
252     return HttpResponseRedirect(question.get_absolute_url())
253
254
255 def manage_pending_data(request, action, forward=None):
256     pending_data = request.session.pop('pending_submission_data', None)
257
258     if not pending_data:
259         raise Http404
260
261     if action == _("cancel"):
262         return HttpResponseRedirect(forward or request.META.get('HTTP_REFERER', '/'))
263     else:
264         if action == _("review"):
265             request.session['reviewing_pending_data'] = True
266
267         request.session['redirect_POST_data'] = pending_data['POST']
268         return HttpResponseRedirect(pending_data['submission_url'])
269
270