Mercurial > public > sg101
view membermap/views.py @ 722:71d17d267e27
Added an ajax form to upload photos & update post box w/image code.
author | Brian Neal <bgneal@gmail.com> |
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date | Sat, 21 Sep 2013 17:00:49 -0500 |
parents | 89b240fe9297 |
children | 9e803323a0d0 |
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""" Views for the membermap application. """ import json from django.shortcuts import render_to_response from django.template.loader import render_to_string from django.template import RequestContext from django.http import HttpResponse from django.http import HttpResponseBadRequest from django.http import HttpResponseForbidden from django.views.decorators.http import require_POST from django.core.cache import cache from membermap.models import MapEntry from membermap.forms import MapEntryForm from bio.models import UserProfile CACHE_KEY = 'membermap_json' CACHE_TIMEOUT = 5 * 60 def index(request): entry = None if request.user.is_authenticated(): try: entry = MapEntry.objects.get(user=request.user) except MapEntry.DoesNotExist: pass if entry is not None: form = MapEntryForm(initial={ 'location': entry.location, 'message': entry.message}) else: form = MapEntryForm() return render_to_response('membermap/index.html', { 'form': form, }, context_instance = RequestContext(request)) def query(request): """ This view is called by AJAX. If the user is logged in, return a JSON object that consists of: "users" : array of user objects "recent" : array of usernames recently modified """ if not request.user.is_authenticated(): return HttpResponseForbidden('You must be logged in.') # Do we have all the JSON cached? s = cache.get(CACHE_KEY) if s: return HttpResponse(s, content_type='application/json') # Compute JSON for the map entries = MapEntry.objects.all().select_related().order_by('user__username') users = [] user_ids = [] recent = [] for entry in entries.iterator(): users.append(dict(name=entry.user.username, lat=entry.lat, lon=entry.lon, message=entry.html, )) user_ids.append(entry.user.id) recent.append((entry.date_updated, entry.user.username)) # Get avatars for all users profiles = UserProfile.objects.filter(user__in=user_ids).select_related() avatars = {} for profile in profiles.iterator(): if profile.avatar and profile.avatar.url: avatars[profile.user.username] = profile.avatar.url # Render the messages that go in the balloons for user in users: user['message'] = render_to_string('membermap/balloon.html', dict(user=user, avatar_url=avatars.get(user['name']))) # Produce the list of recent updates recent.sort(reverse=True) del recent[10:] recent = [entry[1] for entry in recent] # Create the JSON for the map result = dict(users=users, recent=recent) s = json.dumps(result, ensure_ascii=False) cache.set(CACHE_KEY, s, CACHE_TIMEOUT) return HttpResponse(s, content_type='application/json') @require_POST def add(request): """ This view is called by AJAX to add/update the user to the map. It returns the new JSON representation of the user. """ if not request.user.is_authenticated(): return HttpResponseForbidden('You must be logged in.') loc = request.POST.get('loc', None) lat = request.POST.get('lat', None) lon = request.POST.get('lon', None) msg = request.POST.get('msg', '') if loc is None or lat is None or lon is None: return HttpResponseBadRequest('Missing parameters') try: lat = float(lat) lon = float(lon) except ValueError: return HttpResponseBadRequest('Invalid lat/lon') try: entry = MapEntry.objects.get(user=request.user) except MapEntry.DoesNotExist: entry = MapEntry(user=request.user) entry.location = loc entry.lat = lat entry.lon = lon entry.message = msg entry.save() cache.delete(CACHE_KEY) avatar_url = None profile = entry.user.get_profile() if profile.avatar and profile.avatar.url: avatar_url = profile.avatar.url u = dict(name=entry.user.username, lat=entry.lat, lon=entry.lon, message=entry.html) u['message'] = render_to_string('membermap/balloon.html', dict(user=u, avatar_url=avatar_url)) result = json.dumps(u, ensure_ascii=False) return HttpResponse(result, content_type='application/json') @require_POST def delete(request): """ This view is called by AJAX to delete the user from the map. """ if not request.user.is_authenticated(): return HttpResponseForbidden('You must be logged in.') try: entry = MapEntry.objects.get(user=request.user) except MapEntry.DoesNotExist: pass else: entry.delete() cache.delete(CACHE_KEY) return HttpResponse('')