Fix #1416 -- Add canonical geodata field (#1458)

* Fix #1416 -- Add canonical geodata field for events and subevents

* Add optional geocoding through OpenCageData

* Fix markup everywhere

* Add Leaflet map to geo coordinates

* Fix tests, add credits

* Fix spelling

src/pretix/base/middleware.py

@@ -14,6 +14,7 @@ from django.utils.translation.trans_real import (
     parse_accept_lang_header,
 )
 
+from pretix.base.settings import GlobalSettingsObject
 from pretix.multidomain.urlreverse import get_domain
 
 _supported = None
@@ -187,6 +188,11 @@ class SecurityMiddleware(MiddlewareMixin):
         # https://github.com/pretix/pretix/issues/765
         resp['P3P'] = 'CP=\"ALL DSP COR CUR ADM TAI OUR IND COM NAV INT\"'
 
+        img_src = []
+        gs = GlobalSettingsObject()
+        if gs.settings.leaflet_tiles:
+            img_src.append(gs.settings.leaflet_tiles[:gs.settings.leaflet_tiles.index("/", 10)].replace("{s}", "*"))
+
         h = {
             'default-src': ["{static}"],
             'script-src': ['{static}', 'https://checkout.stripe.com', 'https://js.stripe.com'],
@@ -196,7 +202,7 @@ class SecurityMiddleware(MiddlewareMixin):
             'child-src': ['{static}', 'https://checkout.stripe.com', 'https://js.stripe.com'],
             'style-src': ["{static}", "{media}"],
             'connect-src': ["{dynamic}", "{media}", "https://checkout.stripe.com"],
-            'img-src': ["{static}", "{media}", "data:", "https://*.stripe.com"],
+            'img-src': ["{static}", "{media}", "data:", "https://*.stripe.com"] + img_src,
             'font-src': ["{static}"],
             'media-src': ["{static}", "data:"],
             # form-action is not only used to match on form actions, but also on URLs

src/pretix/base/migrations/0139_auto_20191019_1317.py

@@ -0,0 +1,33 @@
+# Generated by Django 2.2.1 on 2019-10-19 13:17
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0138_auto_20191017_1151'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='event',
+            name='geo_lat',
+            field=models.FloatField(null=True),
+        ),
+        migrations.AddField(
+            model_name='event',
+            name='geo_lon',
+            field=models.FloatField(null=True),
+        ),
+        migrations.AddField(
+            model_name='subevent',
+            name='geo_lat',
+            field=models.FloatField(null=True),
+        ),
+        migrations.AddField(
+            model_name='subevent',
+            name='geo_lon',
+            field=models.FloatField(null=True),
+        ),
+    ]

src/pretix/base/models/event.py

@@ -324,6 +324,14 @@ class Event(EventMixin, LoggedModel):
         max_length=200,
         verbose_name=_("Location"),
     )
+    geo_lat = models.FloatField(
+        verbose_name=_("Latitude"),
+        null=True, blank=True,
+    )
+    geo_lon = models.FloatField(
+        verbose_name=_("Longitude"),
+        null=True, blank=True,
+    )
     plugins = models.TextField(
         null=False, blank=True,
         verbose_name=_("Plugins"),
@@ -929,6 +937,14 @@ class SubEvent(EventMixin, LoggedModel):
         max_length=200,
         verbose_name=_("Location"),
     )
+    geo_lat = models.FloatField(
+        verbose_name=_("Latitude"),
+        null=True, blank=True,
+    )
+    geo_lon = models.FloatField(
+        verbose_name=_("Longitude"),
+        null=True, blank=True
+    )
     frontpage_text = I18nTextField(
         null=True, blank=True,
         verbose_name=_("Frontpage text")

src/pretix/base/settings.py

@@ -704,6 +704,18 @@ Your {event} team"""))
         'default': '',
         'type': LazyI18nString
     },
+    'opencagedata_apikey': {
+        'default': None,
+        'type': str
+    },
+    'leaflet_tiles': {
+        'default': None,
+        'type': str
+    },
+    'leaflet_tiles_attribution': {
+        'default': None,
+        'type': str
+    },
     'frontpage_subevent_ordering': {
         'default': 'date_ascending',
         'type': str