diff options
Diffstat (limited to 'chimere_rss/feeds.py')
| -rw-r--r-- | chimere_rss/feeds.py | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/chimere_rss/feeds.py b/chimere_rss/feeds.py new file mode 100644 index 0000000..18a4259 --- /dev/null +++ b/chimere_rss/feeds.py @@ -0,0 +1,230 @@ +#!/usr/bin/env python +# -*- coding: utf-8 -*- +# Copyright (C) 2010 Pierre Clarenc <pierre.crc_AT_gmailDOTcom>, +# Samuel Renard <renard.samuel_AT_gmailDOTcom>, +# Étienne Loks <etienne.loks_AT_peacefrogsDOTnet> + +# 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.utils.translation import ugettext as _ +from django.contrib.syndication.feeds import Feed +from django.contrib.syndication.feeds import FeedDoesNotExist +from chimere.main.models import Category, SubCategory, Marker, Area +from django.core.exceptions import ObjectDoesNotExist +from django.contrib.gis.geos import * + +from chimere import settings + +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 settings.BASE_URL + '?zoom=16&lat=%d&lon=%d¤t_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 "" + +class LatestPOIsByCategory(BaseFeed): + ''' + Last Points of interests by category in Feeds + ''' + title_template = "rss_title.html" + description_template = "rss_descr.html" + + def get_object(self, bits): + """ + Get extra url, after rss/category/ id of category + """ + if len(bits) != 1: + raise ObjectDoesNotExist + return Category.objects.get(id__exact=bits[0]) + + 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 settings.BASE_URL + 'rss/category/' + str(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 = "rss_title.html" + description_template = "rss_descr.html" + + def get_object(self, bits): + if len(bits) != 1: + raise ObjectDoesNotExist + return SubCategory.objects.get(id__exact=bits[0]) + + 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 settings.BASE_URL + 'rss/subcategory/' + str(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 = "rss_title.html" + description_template = "rss_descr.html" + + def title(self): + return settings.PROJECT_NAME + u" - " + _(u"Last points of interest") + + def link(self): + return settings.BASE_URL + 'rss/categories/' + + 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 = "rss_title.html" + description_template = "rss_descr.html" + upper_left_lat = 0 + upper_left_lon = 0 + lower_right_lat = 0 + lower_right_lon = 0 + + def get_object(self, bits): + """ + Get the extra url. Parameters are the coordinates of the zone (the + upper left and lower right points) + """ + if len(bits) != 1: + raise ObjectDoesNotExist + # Then define the upper right and lower left points + coordinates = str(bits[0]).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.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 + return settings.BASE_URL + 'rss/area/' \ + + str(self.upper_left_lat) + '_' + str(self.upper_left_lon) + \ + '_' + str(self.lower_right_lat) + '_' + str(self.lower_right_lon) + + 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 = "rss_title.html" + description_template = "rss_descr.html" + + def get_object(self, bits): + if len(bits) != 1: + raise ObjectDoesNotExist + return Area.objects.get(id__exact=bits[0]) + + 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 settings.BASE_URL + 'rss/areaid/' + str(obj.id) + + def items(self, obj): + sql = 'select * from "main_marker" where ' + obj.getIncludeSql() + sql += ' and "main_marker".available_date is not null' + sql += ' and "main_marker".status=\'A\'' + sql += ' order by "main_marker".available_date desc limit 15' + q = Marker.objects.raw(sql) + return q |