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#!/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.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 LatestPOIsByCategory(Feed):
'''
Last Points of interests by category in Feeds
'''
title_template = "rss_title.html"
description_template = "rss_descr.html"
# Get extra url, after rss/category/ -> bits[0]=id of category
def get_object(self, bits):
if len(bits) != 1:
raise ObjectDoesNotExist
return Category.objects.get(id__exact=bits[0])
# Define the title of the feed, here The name of the category
def title(self, obj):
return "Chimere - %s" % obj.name
# Define the link of the feed. Feeds agregators update at this link
def link(self, obj):
if not obj:
raise FeedDoesNotExist
return settings.BASE_URL + 'rss/category/' + str(obj.id)
# Description of the feed
def description(self, obj):
return obj.description
# Link of the item/POI. Here the link is the permalink of the marker/POI
def item_link(self, item):
# Return the permalink of the POI :
# Get thirst the attribute point of the marker
# Then we had to transform this to the good system metric. From srid=4326 to srid=900913
coord = item.point
coord.transform(settings.EPSG_PROJECTION)
return settings.BASE_URL + '?zoom=16&lat=' + str(coord.y) + '&lon=' + str(coord.x) + '&layers=BTT&checked_categories=1&display_submited=false'
# Date of the Marker when it has been available
def item_pubdate(self,item):
return item.avail_date
# 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
def items(self, obj):
return Marker.objects.filter(subcategory__category__id__exact=obj.id, status__exact='A').order_by('-avail_date')[:15]
class LatestPOIsBySubCategory(Feed):
'''
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 obj.category.name + "Chimere - %s" % obj.name
def link(self, obj):
if not obj:
raise FeedDoesNotExist
return settings.BASE_URL + 'rss/subcategory/' + str(obj.id)
def description(self, obj):
return ""
def item_link(self, item):
# Renvoyer le permalink du POI :
coord = item.point
coord.transform(settings.EPSG_PROJECTION)
return settings.BASE_URL + '?zoom=16&lat=' + str(coord.y) + '&lon=' + str(coord.x) + '&layers=BTT&checked_categories=1&display_submited=false'
def item_pubdate(self,item):
return item.avail_date
def items(self, obj):
return Marker.objects.filter(subcategory__id__exact=obj.id, status__exact='A').order_by('-avail_date')[:15]
class LatestPOIs(Feed):
'''
Last Points of interests
'''
title_template = "rss_title.html"
description_template = "rss_descr.html"
def title(self):
return "Chimere - Last POIs"
def link(self):
return settings.BASE_URL + 'rss/categories/'
def description(self):
return "Latest POIs from Chimere"
def item_link(self, item):
# Renvoyer le permalink du POI :
coord = item.point
coord.transform(settings.EPSG_PROJECTION)
return settings.BASE_URL + '?zoom=16&lat=' + str(coord.y) + '&lon=' + str(coord.x) + '&layers=BTT&checked_categories=1&display_submited=false'
def item_pubdate(self,item):
return item.avail_date
def items(self):
return Marker.objects.filter(status__exact='A').order_by('-avail_date')[:15]
class LatestPOIsByZone(Feed):
'''
Last Points of interests by zone by coordinates
'''
title_template = "rss_title.html"
description_template = "rss_descr.html"
# Attributes which store coordinates of the requested zone
upper_left_lat = 0
upper_left_lon = 0
lower_right_lat = 0
lower_right_lon = 0
def get_object(self, bits):
if len(bits) != 1:
raise ObjectDoesNotExist
# Get the extra url. Parameters are the coordinates of the zone (the upper left and lower right points)
# 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.
# Cordinates are define with a srid=900913, use by google, yahoo but no OpenStreeMap
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_PROJECTION)
# OSM uses the standard srid=4326, wich uses the real pairs latitude/longitude in degrees.
areaBox.transform(settings.EPSG_DISPLAY_PROJECTION)
return areaBox
def title(self, obj):
return "Chimere - Last POIs by area"
# Define the link of the feed. It's the same url as we get in the method get_object
def link(self, obj):
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 description(self, obj):
return ""
# Link of the item/POI. Here the link is the permalink of the marker/POI
def item_link(self, item):
# Return the permalink of the POI :
# Get thirst the attribute point of the marker
# Then we had to transform this to the good system metric. From srid=4326 to srid=900913
coord = item.point
coord.transform(settings.EPSG_PROJECTION)
return settings.BASE_URL + '?zoom=16&lat=' + str(coord.y) + '&lon=' + str(coord.x) + '&layers=BTT&checked_categories=1&display_submited=false'
# Return the date of the Marker
def item_pubdate(self,item):
return item.avail_date
# 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
def items(self, obj):
return Marker.objects.filter(point__contained=obj, status__exact='A').order_by('-avail_date')[:15]
class LatestPOIsByZoneID(Feed):
'''
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 "Chimere - Last POIs of %s" % obj.name
def link(self, obj):
if not obj:
raise FeedDoesNotExist
return settings.BASE_URL + 'rss/areaid/' + str(obj.id)
def description(self, obj):
return ""
def item_link(self, item):
coord = item.point
coord.transform(settings.EPSG_PROJECTION)
return settings.BASE_URL + '?zoom=16&lat=' + str(coord.y) + '&lon=' + str(coord.x) + '&layers=BTT&checked_categories=1&display_submited=false'
def item_pubdate(self,item):
return item.avail_date
def items(self, obj):
upper_left_lat = float(obj.upper_left_corner.x)
upper_left_lon = float(obj.upper_left_corner.y)
lower_right_lat = float(obj.lower_right_corner.x)
lower_right_lon = float(obj.lower_right_corner.y)
upper_right_lat = upper_left_lat
upper_right_lon = lower_right_lon
lower_left_lat = lower_right_lat
lower_left_lon = upper_left_lon
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_PROJECTION)
areaBox.transform(settings.EPSG_DISPLAY_PROJECTION)
return Marker.objects.filter(point__contained=areaBox)
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