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Diffstat (limited to 'chimere/feeds.py')
| -rw-r--r-- | chimere/feeds.py | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/chimere/feeds.py b/chimere/feeds.py new file mode 100644 index 0000000..025ceb0 --- /dev/null +++ b/chimere/feeds.py @@ -0,0 +1,235 @@ +#!/usr/bin/env python +# -*- coding: utf-8 -*- +# Copyright (C) 2012 Étienne Loks <etienne.loks_AT_peacefrogsDOTnet> +# Copyright (C) 2010 Pierre Clarenc <pierre.crc_AT_gmailDOTcom>, +# Samuel Renard <renard.samuel_AT_gmailDOTcom> + +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as +# published by the Free Software Foundation, either version 3 of the +# License, or (at your option) any later version. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. + +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. + +# See the file COPYING for details. + +from django.conf import settings +from django.contrib.gis.geos import * +from django.contrib.gis.feeds import Feed +from django.contrib.syndication.views import FeedDoesNotExist +from django.core.exceptions import ObjectDoesNotExist +from django.core.urlresolvers import reverse +from django.utils.translation import ugettext as _ + +from django.shortcuts import get_object_or_404 + +from chimere.models import Category, SubCategory, Marker, Area + + +class BaseFeed(Feed): + """ + Base feed for Chimere objects + """ + def item_link(self, item): + ''' Return POI permalink ''' + coord = item.point + cat = 0 + if item.categories.all() and item.categories.all()[0]: + cat = item.categories.all()[0].pk + return reverse('chimere:index') + '?zoom=16&lat=%f&lon=%f&'\ + 'current_feature=%d&checked_categories=%d' % (coord.y, coord.x, + item.id, cat) + + def item_pubdate(self, item): + """ + Date of the Marker when it has been available + """ + return item.available_date + + def description(self, obj): + return "" + + def item_geometry(self, obj): + return obj.point + + +class LatestPOIsByCategory(BaseFeed): + ''' + Last Points of interests by category in Feeds + ''' + title_template = "chimere/feeds/rss_title.html" + description_template = "chimere/feeds/rss_descr.html" + + def get_object(self, request, category_id, area_name=''): + return get_object_or_404(Category, id=category_id) + + def title(self, obj): + """ + Define the title of the feed + """ + return u"%s - %s" % (settings.PROJECT_NAME, obj.name) + + def link(self, obj): + """ + Define the link of the feed. + """ + if not obj: + raise FeedDoesNotExist + return reverse('chimere:feeds-cat', args=['', obj.id]) + + def items(self, obj): + """ + Requests to marker where its category match the category is requested + and its status is available + This returns a list of the 15 last markers/POIs ordering by date + """ + q = Marker.objects.filter( + status__exact='A', + categories__category__id__exact=obj.id, + available_date__isnull=False).order_by('-available_date')[:15] + return q + + +class LatestPOIsBySubCategory(BaseFeed): + ''' + Last Points of interests by SubCategory in Feeds + ''' + title_template = "chimere/feeds/rss_title.html" + description_template = "chimere/feeds/rss_descr.html" + + def get_object(self, request, category_id, area_name=''): + return get_object_or_404(SubCategory, id=category_id) + + def title(self, obj): + return u"%s - %s - %s" % (settings.PROJECT_NAME, obj.category.name, + obj.name) + + def link(self, obj): + if not obj: + raise FeedDoesNotExist + return reverse('chimere:feeds-subcat', args=['', obj.id]) + + def items(self, obj): + q = Marker.objects.filter( + categories__id__exact=obj.id, + available_date__isnull=False, status__exact='A')\ + .order_by('-available_date')[:15] + return q + + +class LatestPOIs(BaseFeed): + ''' + Last Points of interests + ''' + title_template = "chimere/feeds/rss_title.html" + description_template = "chimere/feeds/rss_descr.html" + + def title(self): + return settings.PROJECT_NAME + u" - " + _(u"Last points of interest") + + def link(self): + return reverse('chimere:feeds-global') + + def description(self): + return _("Latest points of interest from ") + settings.PROJECT_NAME + + def items(self): + q = Marker.objects.filter( + status__exact='A', + available_date__isnull=False).order_by('-available_date')[:15] + return q + + +class LatestPOIsByZone(BaseFeed): + ''' + Last Points of interests by zone by coordinates + ''' + title_template = "chimere/feeds/rss_title.html" + description_template = "chimere/feeds/rss_descr.html" + upper_left_lat = 0 + upper_left_lon = 0 + lower_right_lat = 0 + lower_right_lon = 0 + + def get_object(self, request, area, area_name=''): + """ + Get the extra url. Parameters are the coordinates of the zone (the + upper left and lower right points) + """ + if not area: + raise ObjectDoesNotExist + # Then define the upper right and lower left points + coordinates = str(area).split('_') + upper_left_lat = float(coordinates[0]) + upper_left_lon = float(coordinates[1]) + lower_right_lat = float(coordinates[2]) + lower_right_lon = float(coordinates[3]) + upper_right_lat = upper_left_lat + upper_right_lon = lower_right_lon + lower_left_lat = lower_right_lat + lower_left_lon = upper_left_lon + # Define a Polygon with the 4 points of the zone. + areaBox = Polygon(((upper_left_lon, upper_left_lat), + (upper_right_lon, upper_right_lat), + (lower_right_lon, lower_right_lat), + (lower_left_lon, lower_left_lat), + (upper_left_lon, upper_left_lat)), + srid=settings.CHIMERE_EPSG_DISPLAY_PROJECTION) + return areaBox + + def title(self, obj): + return settings.PROJECT_NAME + u" - " +\ + _(u"Last points of interest by area") + + def link(self, obj): + """ + Define the link of the feed. It's the same url as we get in the method + get_object + """ + if not obj: + raise FeedDoesNotExist + area = str(self.upper_left_lat) + '_' + str(self.upper_left_lon) + \ + '_' + str(self.lower_right_lat) + '_' + str(self.lower_right_lon) + return reverse('chimere:feeds-area', args=['', area]) + + def items(self, obj): + """ + Request to return Markers WHERE there points are containes in the zone + which is requested. + This returns a list of the 15 last markers/POIs ordering by date + """ + q = Marker.objects.filter( + point__contained=obj, status__exact='A', + available_date__isnull=False).order_by('-available_date')[:15] + return q + + +class LatestPOIsByZoneID(BaseFeed): + ''' + Last Points of interests by zone by id + ''' + title_template = "chimere/feeds/rss_title.html" + description_template = "chimere/feeds/rss_descr.html" + + def get_object(self, request, area_id, area_name=''): + return get_object_or_404(Area, id=area_id) + + def title(self, obj): + return settings.PROJECT_NAME + u" - " + \ + _(u"Last points of interest") + u" - " + obj.name + + def link(self, obj): + if not obj: + raise FeedDoesNotExist + return reverse('chimere:feeds-areaid', args=['', obj.id]) + + def items(self, obj): + q = Marker.objects.filter(available_date__isnull=False, status='A') + q = q.filter(obj.getIncludeMarker()).order_by('-available_date')[:15] + return q |