terom@80: import calendar # timegm
terom@80: import logging
terom@80: 
terom@2: from django.http import HttpResponse, HttpResponseRedirect, Http404
terom@12: from django.shortcuts import render
terom@72: from django.utils import timezone, http
terom@2: 
terom@2: from qrurls.models import URL, URLItem
terom@2: 
terom@80: log = logging.getLogger('qrurls.views')
terom@72: 
terom@54: """
terom@54:     Public frontend UI.
terom@54: """
terom@54: 
terom@72: def http_datetime (dt) :
terom@72:     return http.http_date(calendar.timegm(dt.utctimetuple()))
terom@72: 
terom@12: def index (request) :
terom@12:     urls = URL.objects.all()
terom@12:     return render(request, 'qrurls/index.html', dict(
terom@12:         urls    = urls,
terom@12:     ))
terom@12: 
terom@81: def shorturl (request, shorturl=None) :
terom@70:     """
terom@70:         Primary frontend for redirecting based on current time.
terom@70:     """
terom@76: 
terom@82:     try:
terom@82:         url, modified = URLItem.get_url(shorturl)
terom@82:     except URLItem.DoesNotExist:
terom@82:         raise Http404()
terom@33: 
terom@40:     # redirect, either directly, or to image()
terom@73:     response = HttpResponseRedirect(url)
terom@74:     response['Vary'] = ''
terom@73:     response['Last-Modified'] = http_datetime(modified)
terom@72:     return response
terom@2:     
terom@76: def item (request, shorturl, item_id) :
terom@71:     """
terom@71:         Frontend for a specific item.
terom@71:     """
terom@76:     
terom@82:     try :
terom@82:         url_item = URLItem.get_item(shorturl, item_id=item_id,
terom@82:             related=('shorturl', 'image'),
terom@82:         )
terom@82:     except URLItem.DoesNotExist:
terom@82:         raise Http404()
terom@71: 
terom@43:     if url_item.url :
terom@72:         response = HttpResponseRedirect(url_item.url)
terom@43:     elif url_item.image :
terom@72:         response = render(request, 'qrurls/image.html', dict(
terom@78:             title   = url_item.title(),
terom@40:             image   = url_item.image,
terom@40:         ))
terom@40:     else :
terom@33:         raise Http404()
terom@72: 
terom@72:     # set cache
terom@74:     response['Vary'] = ''
terom@72:     response['Last-Modified'] = http_datetime(url_item.last_modified())
terom@72:     return response
terom@72: