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venv/Lib/site-packages/django/contrib/gis/sitemaps/__init__.py

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+# Geo-enabled Sitemap classes.
+from django.contrib.gis.sitemaps.kml import KMLSitemap, KMZSitemap
+
+__all__ = ['KMLSitemap', 'KMZSitemap']

venv/Lib/site-packages/django/contrib/gis/sitemaps/kml.py

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+from django.apps import apps
+from django.contrib.gis.db.models import GeometryField
+from django.contrib.sitemaps import Sitemap
+from django.db import models
+from django.urls import reverse
+
+
+class KMLSitemap(Sitemap):
+    """
+    A minimal hook to produce KML sitemaps.
+    """
+    geo_format = 'kml'
+
+    def __init__(self, locations=None):
+        # If no locations specified, then we try to build for
+        # every model in installed applications.
+        self.locations = self._build_kml_sources(locations)
+
+    def _build_kml_sources(self, sources):
+        """
+        Go through the given sources and return a 3-tuple of the application
+        label, module name, and field name of every GeometryField encountered
+        in the sources.
+
+        If no sources are provided, then all models.
+        """
+        kml_sources = []
+        if sources is None:
+            sources = apps.get_models()
+        for source in sources:
+            if isinstance(source, models.base.ModelBase):
+                for field in source._meta.fields:
+                    if isinstance(field, GeometryField):
+                        kml_sources.append((source._meta.app_label,
+                                            source._meta.model_name,
+                                            field.name))
+            elif isinstance(source, (list, tuple)):
+                if len(source) != 3:
+                    raise ValueError('Must specify a 3-tuple of (app_label, module_name, field_name).')
+                kml_sources.append(source)
+            else:
+                raise TypeError('KML Sources must be a model or a 3-tuple.')
+        return kml_sources
+
+    def get_urls(self, page=1, site=None, protocol=None):
+        """
+        This method is overridden so the appropriate `geo_format` attribute
+        is placed on each URL element.
+        """
+        urls = Sitemap.get_urls(self, page=page, site=site, protocol=protocol)
+        for url in urls:
+            url['geo_format'] = self.geo_format
+        return urls
+
+    def items(self):
+        return self.locations
+
+    def location(self, obj):
+        return reverse(
+            'django.contrib.gis.sitemaps.views.%s' % self.geo_format,
+            kwargs={
+                'label': obj[0],
+                'model': obj[1],
+                'field_name': obj[2],
+            },
+        )
+
+
+class KMZSitemap(KMLSitemap):
+    geo_format = 'kmz'

venv/Lib/site-packages/django/contrib/gis/sitemaps/views.py

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+from django.apps import apps
+from django.contrib.gis.db.models import GeometryField
+from django.contrib.gis.db.models.functions import AsKML, Transform
+from django.contrib.gis.shortcuts import render_to_kml, render_to_kmz
+from django.core.exceptions import FieldDoesNotExist
+from django.db import DEFAULT_DB_ALIAS, connections
+from django.http import Http404
+
+
+def kml(request, label, model, field_name=None, compress=False, using=DEFAULT_DB_ALIAS):
+    """
+    This view generates KML for the given app label, model, and field name.
+
+    The field name must be that of a geographic field.
+    """
+    placemarks = []
+    try:
+        klass = apps.get_model(label, model)
+    except LookupError:
+        raise Http404('You must supply a valid app label and module name.  Got "%s.%s"' % (label, model))
+
+    if field_name:
+        try:
+            field = klass._meta.get_field(field_name)
+            if not isinstance(field, GeometryField):
+                raise FieldDoesNotExist
+        except FieldDoesNotExist:
+            raise Http404('Invalid geometry field.')
+
+    connection = connections[using]
+
+    if connection.features.has_AsKML_function:
+        # Database will take care of transformation.
+        placemarks = klass._default_manager.using(using).annotate(kml=AsKML(field_name))
+    else:
+        # If the database offers no KML method, we use the `kml`
+        # attribute of the lazy geometry instead.
+        placemarks = []
+        if connection.features.has_Transform_function:
+            qs = klass._default_manager.using(using).annotate(
+                **{'%s_4326' % field_name: Transform(field_name, 4326)})
+            field_name += '_4326'
+        else:
+            qs = klass._default_manager.using(using).all()
+        for mod in qs:
+            mod.kml = getattr(mod, field_name).kml
+            placemarks.append(mod)
+
+    # Getting the render function and rendering to the correct.
+    if compress:
+        render = render_to_kmz
+    else:
+        render = render_to_kml
+    return render('gis/kml/placemarks.kml', {'places': placemarks})
+
+
+def kmz(request, label, model, field_name=None, using=DEFAULT_DB_ALIAS):
+    """
+    Return KMZ for the given app label, model, and field name.
+    """
+    return kml(request, label, model, field_name, compress=True, using=using)