# encoding:utf-8
import os.path
import time, datetime, random
import logging
from django.core.files.storage import default_storage
from django.shortcuts import render_to_response, get_object_or_404
from django.contrib.auth.decorators import login_required
from django.http import HttpResponseRedirect, HttpResponse, HttpResponseForbidden, Http404
from django.template import RequestContext
from django.utils.html import * #todo: remove import * in favor of explicit imports
from django.utils import simplejson
from django.utils.translation import ugettext as _
from django.core.urlresolvers import reverse
from django.core.exceptions import PermissionDenied
from forum.forms import *
from forum.models import *
from forum.auth import *
from forum.const import *
from forum import auth
from forum.utils.forms import get_next_url
from forum.views.readers import _get_tags_cache_json
# used in index page
INDEX_PAGE_SIZE = 20
INDEX_AWARD_SIZE = 15
INDEX_TAGS_SIZE = 100
# used in tags list
DEFAULT_PAGE_SIZE = 60
# used in questions
QUESTIONS_PAGE_SIZE = 10
# used in answers
ANSWERS_PAGE_SIZE = 10
def upload(request):#ajax upload file to a question or answer
class FileTypeNotAllow(Exception):
pass
class FileSizeNotAllow(Exception):
pass
class UploadPermissionNotAuthorized(Exception):
pass
#%s
xml_template = "%s"
try:
f = request.FILES['file-upload']
# check upload permission
if not auth.can_upload_files(request.user):
raise UploadPermissionNotAuthorized
# check file type
file_name_suffix = os.path.splitext(f.name)[1].lower()
if not file_name_suffix in settings.ALLOW_FILE_TYPES:
raise FileTypeNotAllow
# generate new file name
new_file_name = str(time.time()).replace('.', str(random.randint(0,100000))) + file_name_suffix
# use default storage to store file
default_storage.save(new_file_name, f)
# check file size
# byte
size = default_storage.size(new_file_name)
if size > settings.ALLOW_MAX_FILE_SIZE:
default_storage.delete(new_file_name)
raise FileSizeNotAllow
result = xml_template % ('Good', '', default_storage.url(new_file_name))
except UploadPermissionNotAuthorized:
result = xml_template % ('', _('uploading images is limited to users with >60 reputation points'), '')
except FileTypeNotAllow:
result = xml_template % ('', _("allowed file types are 'jpg', 'jpeg', 'gif', 'bmp', 'png', 'tiff'"), '')
except FileSizeNotAllow:
result = xml_template % ('', _("maximum upload file size is %sK") % settings.ALLOW_MAX_FILE_SIZE / 1024, '')
except Exception:
result = xml_template % ('', _('Error uploading file. Please contact the site administrator. Thank you. %s' % Exception), '')
return HttpResponse(result, mimetype="application/xml")
#@login_required #actually you can post anonymously, but then must register
def ask(request):#view used to ask a new question
"""a view to ask a new question
gives space for q title, body, tags and checkbox for to post as wiki
user can start posting a question anonymously but then
must login/register in order for the question go be shown
"""
if request.method == "POST":
form = AskForm(request.POST)
if form.is_valid():
added_at = datetime.datetime.now()
#todo: move this to clean_title
title = form.cleaned_data['title'].strip()
wiki = form.cleaned_data['wiki']
#todo: move this to clean_tagnames
tagnames = form.cleaned_data['tags'].strip()
text = form.cleaned_data['text']
#todo: move this to AskForm.clean_text
#todo: make custom MarkDownField
text = form.cleaned_data['text']
if request.user.is_authenticated():
author = request.user
question = Question.objects.create_new(
title = title,
author = author,
added_at = added_at,
wiki = wiki,
tagnames = tagnames,
text = text,
)
return HttpResponseRedirect(question.get_absolute_url())
else:
request.session.flush()
session_key = request.session.session_key
summary = strip_tags(text)[:120]
question = AnonymousQuestion(
session_key = session_key,
title = title,
tagnames = tagnames,
wiki = wiki,
text = text,
summary = summary,
added_at = added_at,
ip_addr = request.META['REMOTE_ADDR'],
)
question.save()
return HttpResponseRedirect(reverse('user_signin_new_question'))
else:
#this branch is for the initial load of ask form
form = AskForm()
if 'title' in request.GET:
#normally this title is inherited from search query
#but it is possible to ask with a parameter title in the url query
form.initial['title'] = request.GET['title']
else:
#attempt to extract title from previous search query
search_state = request.session.get('search_state',None)
if search_state:
query = search_state.query
form.initial['title'] = query
tags = _get_tags_cache_json()
return render_to_response('ask.html', {
'active_tab': 'ask',
'form' : form,
'tags' : tags,
'email_validation_faq_url':reverse('faq') + '#validate',
}, context_instance=RequestContext(request))
@login_required
def edit_question(request, id):#edit or retag a question
"""view to edit question
"""
question = get_object_or_404(Question, id=id)
if question.deleted and not auth.can_view_deleted_post(request.user, question):
raise Http404
if auth.can_edit_post(request.user, question):
return _edit_question(request, question)
elif auth.can_retag_questions(request.user):
return _retag_question(request, question)
else:
raise Http404
def _retag_question(request, question):#non-url subview of edit question - just retag
"""retag question sub-view used by
view "edit_question"
"""
if request.method == 'POST':
form = RetagQuestionForm(question, request.POST)
if form.is_valid():
if form.has_changed():
question.retag(
retagged_by = request.user,
retagged_at = datetime.datetime.now(),
tagnames = form.cleaned_data['tags'],
)
return HttpResponseRedirect(question.get_absolute_url())
else:
form = RetagQuestionForm(question)
return render_to_response('question_retag.html', {
'active_tab': 'questions',
'question': question,
'form' : form,
'tags' : _get_tags_cache_json(),
}, context_instance=RequestContext(request))
def _edit_question(request, question):#non-url subview of edit_question - just edit the body/title
latest_revision = question.get_latest_revision()
revision_form = None
if request.method == 'POST':
if 'select_revision' in request.POST:#revert-type edit
# user has changed revistion number
revision_form = RevisionForm(question, latest_revision, request.POST)
if revision_form.is_valid():
# Replace with those from the selected revision
form = EditQuestionForm(question,
QuestionRevision.objects.get(question=question,
revision=revision_form.cleaned_data['revision']))
else:
form = EditQuestionForm(question, latest_revision, request.POST)
else:#new content edit
# Always check modifications against the latest revision
form = EditQuestionForm(question, latest_revision, request.POST)
if form.is_valid():
if form.has_changed():
edited_at = datetime.datetime.now()
edited_by = request.user
question.apply_edit(
edited_at = edited_at,
edited_by = edited_by,
title = form.cleaned_data['title'],
text = form.cleaned_data['text'],
#todo: summary name clash in question and question revision
comment = form.cleaned_data['summary'],
tags = form.cleaned_data['tags'],
wiki = form.cleaned_data.get('wiki',False),
)
return HttpResponseRedirect(question.get_absolute_url())
else:
revision_form = RevisionForm(question, latest_revision)
form = EditQuestionForm(question, latest_revision)
return render_to_response('question_edit.html', {
'active_tab': 'questions',
'question': question,
'revision_form': revision_form,
'form' : form,
'tags' : _get_tags_cache_json()
}, context_instance=RequestContext(request))
@login_required
def edit_answer(request, id):
answer = get_object_or_404(Answer, id=id)
if answer.deleted and not auth.can_view_deleted_post(request.user, answer):
raise Http404
elif not auth.can_edit_post(request.user, answer):
raise Http404
else:
latest_revision = answer.get_latest_revision()
if request.method == "POST":
if 'select_revision' in request.POST:
# user has changed revistion number
revision_form = RevisionForm(answer, latest_revision, request.POST)
if revision_form.is_valid():
# Replace with those from the selected revision
form = EditAnswerForm(answer,
AnswerRevision.objects.get(answer=answer,
revision=revision_form.cleaned_data['revision']))
else:
form = EditAnswerForm(answer, latest_revision, request.POST)
else:
form = EditAnswerForm(answer, latest_revision, request.POST)
if form.is_valid():
if form.has_changed():
edited_at = datetime.datetime.now()
answer.apply_edit(
edited_at = edited_at,
edited_by = request.user,
text = form.cleaned_data['text'],
comment = form.cleaned_data['summary'],
wiki = False,#todo: fix this there is no "wiki" field on "edit answer"
)
return HttpResponseRedirect(answer.get_absolute_url())
else:
revision_form = RevisionForm(answer, latest_revision)
form = EditAnswerForm(answer, latest_revision)
return render_to_response('answer_edit.html', {
'active_tab': 'questions',
'answer': answer,
'revision_form': revision_form,
'form': form,
}, context_instance=RequestContext(request))
def answer(request, id):#process a new answer
question = get_object_or_404(Question, id=id)
if request.method == "POST":
form = AnswerForm(question, request.user, request.POST)
if form.is_valid():
wiki = form.cleaned_data['wiki']
text = form.cleaned_data['text']
update_time = datetime.datetime.now()
if request.user.is_authenticated():
Answer.objects.create_new(
question=question,
author=request.user,
added_at=update_time,
wiki=wiki,
text=text,
email_notify=form.cleaned_data['email_notify']
)
else:
request.session.flush()
anon = AnonymousAnswer(
question=question,
wiki=wiki,
text=text,
summary=strip_tags(text)[:120],
session_key=request.session.session_key,
ip_addr=request.META['REMOTE_ADDR'],
)
anon.save()
return HttpResponseRedirect(reverse('user_signin_new_answer'))
return HttpResponseRedirect(question.get_absolute_url())
def __generate_comments_json(obj, user):#non-view generates json data for the post comments
comments = obj.comments.all().order_by('id')
# {"Id":6,"PostId":38589,"CreationDate":"an hour ago","Text":"hello there!","UserDisplayName":"Jarrod Dixon","UserUrl":"/users/3/jarrod-dixon","DeleteUrl":null}
json_comments = []
from forum.templatetags.extra_tags import diff_date
for comment in comments:
comment_user = comment.user
delete_url = ""
if user != None and auth.can_delete_comment(user, comment):
#/posts/392845/comments/219852/delete
#todo translate this url
if isinstance(comment.content_object, Answer):
delete_comment_view = 'delete_answer_comment'
elif isinstance(comment.content_object, Question):
delete_comment_view = 'delete_question_comment'
delete_url = reverse(
delete_comment_view,
kwargs = {
'object_id': obj.id,
'comment_id': comment.id
}
)
json_comments.append({"id" : comment.id,
"object_id" : obj.id,
"comment_age" : diff_date(comment.added_at),
"text" : comment.comment,
"user_display_name" : comment_user.username,
"user_url" : comment_user.get_profile_url(),
"delete_url" : delete_url
})
data = simplejson.dumps(json_comments)
return HttpResponse(data, mimetype="application/json")
def question_comments(request, id):#ajax handler for loading comments to question
question = get_object_or_404(Question, id=id)
user = request.user
return __comments(request, question)
def answer_comments(request, id):#ajax handler for loading comments on answer
answer = get_object_or_404(Answer, id=id)
user = request.user
return __comments(request, answer)
def __comments(request, obj):#non-view generic ajax handler to load comments to an object
# only support get post comments by ajax now
user = request.user
if request.is_ajax():
if request.method == "GET":
response = __generate_comments_json(obj, user)
elif request.method == "POST":
if auth.can_add_comments(user,obj):
obj.add_comment(
comment = request.POST.get('comment'),
user = request.user,
)
response = __generate_comments_json(obj, user)
else:
response = HttpResponseForbidden(mimetype="application/json")
return response
def delete_comment(request, object_id='', comment_id='', commented_object_type=None):#ajax handler to delete comment
response = None
commented_object = None
if commented_object_type == 'question':
commented_object = Question
elif commented_object_type == 'answer':
commented_object = Answer
if request.is_ajax():
comment = get_object_or_404(Comment, id=comment_id)
if auth.can_delete_comment(request.user, comment):
obj = get_object_or_404(commented_object, id=object_id)
obj.comments.remove(comment)
obj.comment_count = obj.comment_count - 1
obj.save()
user = request.user
return __generate_comments_json(obj, user)
raise PermissionDenied()