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annotate comments/views.py @ 1089:64fb0d6933a4

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author Brian Neal <bgneal@gmail.com>
date Sun, 08 May 2016 21:03:09 -0500
parents e932f2ecd4a7
children 110bbc78a482
rev   line source
gremmie@1 1 """
gremmie@1 2 Views for the comments application.
bgneal@693 3
gremmie@1 4 """
gremmie@1 5 from django.contrib.auth.decorators import login_required
gremmie@1 6 from django.core.exceptions import ObjectDoesNotExist
gremmie@1 7 from django.http import HttpResponse
gremmie@1 8 from django.http import HttpResponseBadRequest
gremmie@1 9 from django.http import HttpResponseForbidden
gremmie@1 10 from django.db.models import get_model
bgneal@1032 11 from django.shortcuts import render
gremmie@1 12 from django.utils.html import escape
gremmie@1 13 from django.views.decorators.http import require_POST
gremmie@1 14
gremmie@1 15 from core.functions import email_admins
bgneal@974 16 from core.html import image_check, ImageCheckError
bgneal@136 17 from core.markup import site_markup
gremmie@1 18 from comments.forms import CommentForm
gremmie@1 19 from comments.models import Comment
gremmie@1 20 from comments.models import CommentFlag
bgneal@215 21 import antispam
bgneal@215 22 import antispam.utils
bgneal@215 23
gremmie@1 24
bgneal@974 25 PREVIEW_UNAVAILABLE = """
bgneal@974 26 <p><strong>Error</strong>: {}</p>
bgneal@974 27 <p>Sorry, preview is unavailable.</p>
bgneal@974 28 <p>There is an image in your post which failed our image check. We can only
bgneal@1021 29 accept images from a small number of sources for security reasons.</p>
bgneal@1021 30 <p>If there are forms below this post box, you may use them to safely hot-link
bgneal@1021 31 to images hosted elsewhere on the Internet or upload from your computer or
bgneal@1021 32 device.</p>
bgneal@1021 33 <p>If there are no image forms on this page, you can upload a photo from your
bgneal@1021 34 computer or device from your user profile. Copy the image code you receive
bgneal@1021 35 into the post box here.</p>
bgneal@974 36 """
bgneal@974 37
bgneal@974 38
gremmie@1 39 @login_required
gremmie@1 40 @require_POST
gremmie@1 41 def post_comment(request):
gremmie@1 42 """
gremmie@1 43 This function handles the posting of comments. If successful, returns
bgneal@215 44 the comment text as the response. This function is meant to be the target
gremmie@1 45 of an AJAX post.
gremmie@1 46 """
gremmie@1 47 # Look up the object we're trying to comment about
gremmie@1 48 ctype = request.POST.get('content_type', None)
gremmie@1 49 object_pk = request.POST.get('object_pk', None)
gremmie@1 50 if ctype is None or object_pk is None:
gremmie@1 51 return HttpResponseBadRequest('Missing content_type or object_pk field.')
gremmie@1 52
gremmie@1 53 try:
gremmie@1 54 model = get_model(*ctype.split('.', 1))
gremmie@1 55 target = model.objects.get(pk=object_pk)
gremmie@1 56 except TypeError:
gremmie@1 57 return HttpResponseBadRequest(
gremmie@1 58 "Invalid content_type value: %r" % escape(ctype))
gremmie@1 59 except AttributeError:
gremmie@1 60 return HttpResponseBadRequest(
gremmie@1 61 "The given content-type %r does not resolve to a valid model." % \
gremmie@1 62 escape(ctype))
gremmie@1 63 except ObjectDoesNotExist:
gremmie@1 64 return HttpResponseBadRequest(
gremmie@1 65 "No object matching content-type %r and object PK %r exists." % \
gremmie@1 66 (escape(ctype), escape(object_pk)))
gremmie@1 67
gremmie@1 68 # Can we comment on the target object?
gremmie@1 69 if hasattr(target, 'can_comment_on'):
gremmie@1 70 if callable(target.can_comment_on):
gremmie@1 71 can_comment_on = target.can_comment_on()
gremmie@1 72 else:
gremmie@1 73 can_comment_on = target.can_comment_on
gremmie@1 74 else:
gremmie@1 75 can_comment_on = True
gremmie@1 76
gremmie@1 77 if not can_comment_on:
gremmie@1 78 return HttpResponseForbidden('Cannot comment on this item.')
gremmie@1 79
gremmie@1 80 # Check form validity
gremmie@1 81
gremmie@1 82 form = CommentForm(target, request.POST)
gremmie@1 83 if not form.is_valid():
bgneal@963 84 # The client side javascript is pretty simplistic right now and we don't
bgneal@963 85 # want to change it yet. It is expecting a single error string. Just grab
bgneal@963 86 # the first error message and use that.
bgneal@963 87 errors = form.errors.as_data()
bgneal@963 88 msg = errors.values()[0][0].message if errors else 'Unknown error'
bgneal@963 89 return HttpResponseBadRequest(msg)
gremmie@1 90
bgneal@215 91 comment = form.get_comment_object(request.user, request.META.get("REMOTE_ADDR", None))
gremmie@1 92
bgneal@693 93 # Check for spam
bgneal@215 94
bgneal@215 95 if antispam.utils.spam_check(request, comment.comment):
bgneal@215 96 return HttpResponseForbidden(antispam.BUSTED_MESSAGE)
bgneal@215 97
bgneal@963 98 comment.save(html=form.comment_html)
gremmie@1 99
gremmie@1 100 # return the rendered comment
bgneal@1032 101 return render(request, 'comments/comment.html', {
gremmie@1 102 'comment': comment,
bgneal@1032 103 })
bgneal@693 104
gremmie@1 105
gremmie@1 106 @require_POST
gremmie@1 107 def flag_comment(request):
gremmie@1 108 """
gremmie@1 109 This function handles the flagging of comments by users. This function should
gremmie@1 110 be the target of an AJAX post.
gremmie@1 111 """
gremmie@1 112 if not request.user.is_authenticated():
gremmie@1 113 return HttpResponse('Please login or register to flag a comment.')
gremmie@1 114
gremmie@1 115 id = request.POST.get('id', None)
gremmie@1 116 if id is None:
gremmie@1 117 return HttpResponseBadRequest('No id')
gremmie@1 118
gremmie@1 119 try:
gremmie@1 120 comment = Comment.objects.get(pk=id)
gremmie@1 121 except Comment.DoesNotExist:
gremmie@1 122 return HttpResponseBadRequest('No comment with id %s' % id)
gremmie@1 123
gremmie@1 124 flag = CommentFlag(user=request.user, comment=comment)
gremmie@1 125 flag.save()
gremmie@1 126 email_admins('A Comment Has Been Flagged', """Hello,
gremmie@1 127
gremmie@1 128 A user has flagged a comment for review.
gremmie@1 129 """)
gremmie@1 130 return HttpResponse('The comment was flagged. A moderator will review the comment shortly. ' \
gremmie@1 131 'Thanks for helping to improve the discussions on this site.')
gremmie@1 132
gremmie@1 133
gremmie@1 134 @require_POST
gremmie@1 135 def markdown_preview(request):
gremmie@1 136 """
gremmie@1 137 This function should be the target of an AJAX POST. It takes the 'data' parameter
gremmie@1 138 from the POST parameters and returns a rendered HTML page from the data, which
bgneal@693 139 is assumed to be in markdown format. The HTML page is suitable for the preview
gremmie@1 140 function for a javascript editor such as markItUp.
gremmie@1 141 """
gremmie@1 142 if not request.user.is_authenticated():
gremmie@1 143 return HttpResponseForbidden('This service is only available to logged in users.')
gremmie@1 144
gremmie@1 145 data = request.POST.get('data', None)
gremmie@1 146 if data is None:
gremmie@1 147 return HttpResponseBadRequest('No data')
gremmie@1 148
bgneal@974 149 html = site_markup(data)
bgneal@978 150 if html:
bgneal@978 151 try:
bgneal@978 152 image_check(html)
bgneal@978 153 except ImageCheckError as ex:
bgneal@978 154 html = PREVIEW_UNAVAILABLE.format(ex)
bgneal@974 155
bgneal@1032 156 return render(request, 'comments/markdown_preview.html', {
bgneal@974 157 'data': html,
bgneal@1032 158 })