Mercurial > public > sg101
view user_photos/views.py @ 1115:d613d25a021e
Convert login, logout, and lost username views to V3 design.
author | Brian Neal <bgneal@gmail.com> |
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date | Tue, 12 Jul 2016 21:31:09 -0500 |
parents | d9cd3180c12c |
children | 364f8ec48612 |
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"""Views for the user_photos application.""" import json from django.conf import settings from django.contrib.auth import get_user_model from django.contrib.auth.decorators import login_required from django.http import (HttpResponse, HttpResponseForbidden, HttpResponseNotAllowed, JsonResponse) from django.shortcuts import render, redirect, get_object_or_404 from django.views.generic import ListView from django.views.decorators.http import require_POST from django.utils.decorators import method_decorator from django.contrib import messages from user_photos.forms import HotLinkImageForm, UploadForm from user_photos.models import Photo from user_photos.s3 import delete_photos @login_required def upload(request): """This view function receives an uploaded image file from a user. The photo will be resized if necessary and a thumbnail image will be created. The image and thumbnail will then be uploaded to the Amazon S3 service for storage. """ form = None uploads_enabled = settings.USER_PHOTOS_ENABLED if uploads_enabled: if request.method == 'POST': form = UploadForm(request.POST, request.FILES, user=request.user) if form.is_valid(): photo = form.save() return redirect(photo) else: form = UploadForm(user=request.user) return render(request, 'user_photos/upload_form.html', { 'enabled': uploads_enabled, 'form': form, }, status=200 if uploads_enabled else 503) def upload_ajax(request): """This view is the ajax version of the upload function, above. We return a JSON object response to the client with the following name & value pairs: 'success' : false for failure and true for success 'msg' : string error message if success is false 'url' : the image URL as a string if success If a non-200 status code is returned the response will simply be a text string error message. """ if not request.user.is_authenticated(): return HttpResponseForbidden('Please login to use this service') if not request.is_ajax() or request.method != 'POST': return HttpResponseNotAllowed('This method is not allowed') ret = {'success': False, 'msg': '', 'url': ''} if settings.USER_PHOTOS_ENABLED: form = UploadForm(request.POST, request.FILES, user=request.user) if form.is_valid(): photo = form.save() ret['success'] = True ret['url'] = photo.url else: # gather form error messages errors = [] non_field_errors = form.non_field_errors().as_text() if non_field_errors: errors.append(non_field_errors) for field_errors in form.errors.values(): errors.append(field_errors.as_text()) ret['msg'] = '\n'.join(errors) else: ret['msg'] = 'Photo uploads are temporarily disabled' return HttpResponse(json.dumps(ret), content_type='application/json') def upload_ajax_v3(request): """This view is the V3 ajax version of the upload function, above. We return a JSON object response to the client with the following name & value pairs: 'msg' : string error message if success is false 'url' : the image URL as a string if success """ ret = {'error_msg': '', 'url': ''} status_code = 400 if not request.user.is_authenticated(): ret['error_msg'] = 'Please login to use this service' return JsonResponse(ret, status=403) if not request.is_ajax() or request.method != 'POST': ret['error_msg'] = 'This method is not allowed' return JsonResponse(ret, status=405) if settings.USER_PHOTOS_ENABLED: form = UploadForm(request.POST, request.FILES, user=request.user) if form.is_valid(): try: photo = form.save() ret['url'] = photo.url status_code = 200 except Exception as ex: ret['error_msg'] = str(ex) status_code = 500 else: # gather form error messages errors = [] non_field_errors = form.non_field_errors().as_text() if non_field_errors: errors.append(non_field_errors) for field_errors in form.errors.values(): errors.append(field_errors.as_text()) ret['msg'] = '\n'.join(errors) else: ret['msg'] = 'Photo uploads are temporarily disabled' status_code = 403 return JsonResponse(ret, status=status_code) class GalleryView(ListView): """A ListView for displaying a user's photos""" template_name = 'user_photos/gallery.html' context_object_name = 'photos' paginate_by = 50 allow_empty = True def get_queryset(self): self.gallery_owner = get_object_or_404(get_user_model(), username=self.kwargs['username']) return Photo.objects.filter(user=self.gallery_owner).order_by('-upload_date') def get_context_data(self, **kwargs): context = super(GalleryView, self).get_context_data(**kwargs) context['gallery_owner'] = self.gallery_owner return context @method_decorator(login_required) def dispatch(self, *args, **kwargs): return super(GalleryView, self).dispatch(*args, **kwargs) @login_required @require_POST def delete(request): """A view function to allow a user to delete their own photos.""" ret_view, username = 'user_photos-gallery', request.user.username if not settings.USER_PHOTOS_ENABLED: messages.error(request, "This function is disabled temporarily") return redirect(ret_view, username) photo_ids = [] for photo_id in request.POST.getlist('photo_id'): try: n = int(photo_id) except ValueError: continue photo_ids.append(n) count = 0 if photo_ids: qs = Photo.objects.filter(user=request.user, pk__in=photo_ids) count = len(qs) if count: delete_photos(qs) qs.delete() msg = "{} photo{} deleted".format(count, '' if count == 1 else 's') messages.add_message(request, messages.SUCCESS if count > 0 else messages.WARNING, msg) return redirect(ret_view, username) def hotlink_image(request): """This view is responsible for accepting an image URL from a user and converting it to a URL pointing into our S3 bucket if necessary. We return a JSON object response to the client with the following name & value pairs: 'error_msg': string error message if an error occurred 'url': the image URL as a string if success """ ret = {'error_msg': '', 'url': ''} status_code = 400 if not request.user.is_authenticated(): ret['error_msg'] = 'Please login to use this service' return JsonResponse(ret, status=403) if not request.is_ajax() or request.method != 'POST': ret['error_msg'] = 'This method is not allowed' return JsonResponse(ret, status=405) if settings.USER_PHOTOS_ENABLED: form = HotLinkImageForm(request.POST, user=request.user) if form.is_valid(): try: ret['url'] = form.save() status_code = 200 except Exception as ex: ret['error_msg'] = str(ex) status_code = 500 else: # gather form error messages errors = [] non_field_errors = form.non_field_errors().as_text() if non_field_errors: errors.append(non_field_errors) for field_errors in form.errors.values(): errors.append(field_errors.as_text()) ret['error_msg'] = '\n'.join(errors) else: ret['error_msg'] = 'Image linking is temporarily disabled' status_code = 403 return JsonResponse(ret, status=status_code)