--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/app/django/contrib/databrowse/plugins/calendars.py	Fri Jul 18 18:22:23 2008 +0000
@@ -0,0 +1,85 @@
+from django import http
+from django.db import models
+from django.contrib.databrowse.datastructures import EasyModel
+from django.contrib.databrowse.sites import DatabrowsePlugin
+from django.shortcuts import render_to_response
+from django.utils.text import capfirst
+from django.utils.translation import get_date_formats
+from django.utils.encoding import force_unicode
+from django.utils.safestring import mark_safe
+from django.views.generic import date_based
+
+class CalendarPlugin(DatabrowsePlugin):
+    def __init__(self, field_names=None):
+        self.field_names = field_names
+
+    def field_dict(self, model):
+        """
+        Helper function that returns a dictionary of all DateFields or
+        DateTimeFields in the given model. If self.field_names is set, it takes
+        take that into account when building the dictionary.
+        """
+        if self.field_names is None:
+            return dict([(f.name, f) for f in model._meta.fields if isinstance(f, models.DateField)])
+        else:
+            return dict([(f.name, f) for f in model._meta.fields if isinstance(f, models.DateField) and f.name in self.field_names])
+
+    def model_index_html(self, request, model, site):
+        fields = self.field_dict(model)
+        if not fields:
+            return u''
+        return mark_safe(u'<p class="filter"><strong>View calendar by:</strong> %s</p>' % \
+            u', '.join(['<a href="calendars/%s/">%s</a>' % (f.name, force_unicode(capfirst(f.verbose_name))) for f in fields.values()]))
+
+    def urls(self, plugin_name, easy_instance_field):
+        if isinstance(easy_instance_field.field, models.DateField):
+            return [mark_safe(u'%s%s/%s/%s/%s/%s/' % (
+                easy_instance_field.model.url(),
+                plugin_name, easy_instance_field.field.name,
+                easy_instance_field.raw_value.year,
+                easy_instance_field.raw_value.strftime('%b').lower(),
+                easy_instance_field.raw_value.day))]
+
+    def model_view(self, request, model_databrowse, url):
+        self.model, self.site = model_databrowse.model, model_databrowse.site
+        self.fields = self.field_dict(self.model)
+
+        # If the model has no DateFields, there's no point in going further.
+        if not self.fields:
+            raise http.Http404('The requested model has no calendars.')
+
+        if url is None:
+            return self.homepage_view(request)
+        url_bits = url.split('/')
+        if self.fields.has_key(url_bits[0]):
+            return self.calendar_view(request, self.fields[url_bits[0]], *url_bits[1:])
+
+        raise http.Http404('The requested page does not exist.')
+
+    def homepage_view(self, request):
+        easy_model = EasyModel(self.site, self.model)
+        field_list = self.fields.values()
+        field_list.sort(lambda x, y: cmp(x.verbose_name, y.verbose_name))
+        return render_to_response('databrowse/calendar_homepage.html', {'root_url': self.site.root_url, 'model': easy_model, 'field_list': field_list})
+
+    def calendar_view(self, request, field, year=None, month=None, day=None):
+        easy_model = EasyModel(self.site, self.model)
+        queryset = easy_model.get_query_set()
+        extra_context = {'root_url': self.site.root_url, 'model': easy_model, 'field': field}
+        if day is not None:
+            return date_based.archive_day(request, year, month, day, queryset, field.name,
+                template_name='databrowse/calendar_day.html', allow_empty=False, allow_future=True,
+                extra_context=extra_context)
+        elif month is not None:
+            return date_based.archive_month(request, year, month, queryset, field.name,
+                template_name='databrowse/calendar_month.html', allow_empty=False, allow_future=True,
+                extra_context=extra_context)
+        elif year is not None:
+            return date_based.archive_year(request, year, queryset, field.name,
+                template_name='databrowse/calendar_year.html', allow_empty=False, allow_future=True,
+                extra_context=extra_context)
+        else:
+            return date_based.archive_index(request, queryset, field.name,
+                template_name='databrowse/calendar_main.html', allow_empty=True, allow_future=True,
+                extra_context=extra_context)
+        assert False, ('%s, %s, %s, %s' % (field, year, month, day))