From 2b56eed75972ca4aac1fa4a302f1ffc9495c1798 Mon Sep 17 00:00:00 2001
From: Commander1024 <commander@commander1024.de>
Date: Thu, 20 Aug 2020 21:37:27 +0200
Subject: [PATCH] Added OSM map partial, Place model function and added it to
 home.

---
 lostplaces/lostplaces_app/models.py           | 13 ++++
 lostplaces/lostplaces_app/templates/home.html |  1 +
 .../templates/partials/osm_map.html           | 67 +++++++++++++++++++
 3 files changed, 81 insertions(+)
 create mode 100644 lostplaces/lostplaces_app/templates/partials/osm_map.html

diff --git a/lostplaces/lostplaces_app/models.py b/lostplaces/lostplaces_app/models.py
index 907f3bc..209c3b4 100644
--- a/lostplaces/lostplaces_app/models.py
+++ b/lostplaces/lostplaces_app/models.py
@@ -55,6 +55,19 @@ class Place (models.Model):
     longitude = models.FloatField()
     description = models.TextField()
 
+    # Get center position of all LP-geocoordinates.
+
+    def average_latlon():
+        place_list = Place.objects.all()
+        amount = len(place_list)
+        longitude = 0
+        latitude = 0
+    
+        for place in place_list:
+            longitude += place.longitude
+            latitude += place.latitude
+        return (latitude / amount, longitude / amount)
+
     def __str__(self):
         return self.name
 
diff --git a/lostplaces/lostplaces_app/templates/home.html b/lostplaces/lostplaces_app/templates/home.html
index 40894a6..1e229d5 100644
--- a/lostplaces/lostplaces_app/templates/home.html
+++ b/lostplaces/lostplaces_app/templates/home.html
@@ -7,6 +7,7 @@
 
 <div class="LP-PlaceGrid">
     <h1 class="LP-Headline LP-Headline">Explore the latest locations</h1>
+    {% include 'partials/osm_map.html' %}
     <ul class="LP-PlaceGrid__Grid">
         {% for place in place_list %}
         <li class="LP-PlaceGrid__Item">
diff --git a/lostplaces/lostplaces_app/templates/partials/osm_map.html b/lostplaces/lostplaces_app/templates/partials/osm_map.html
new file mode 100644
index 0000000..4392d20
--- /dev/null
+++ b/lostplaces/lostplaces_app/templates/partials/osm_map.html
@@ -0,0 +1,67 @@
+<div id="map" class="map"></div>
+    <div id="info" class="map-popup"></div>
+    <script type="text/javascript">
+        var map = new ol.Map({
+        target: 'map',
+        layers: [
+            new ol.layer.Tile({
+            source: new ol.source.OSM()
+            }),
+        ],
+        view: new ol.View({
+            center: ol.proj.fromLonLat([{{average_latlon|last}}, {{average_latlon|first}}]),
+            zoom: 6
+        })
+        });
+
+          var vectorSource = new ol.source.Vector({
+            features: [
+            {% for place in place_list %}
+            new ol.Feature({
+              geometry: new ol.geom.Point(
+                ol.proj.fromLonLat([{{place.longitude}},{{place.latitude}}])
+              ), 
+              url: '/{{place.pk}}',
+              name: '{{place.name}}'
+            }),
+            {% endfor %}
+            ]
+          });
+
+          var markerVectorLayer = new ol.layer.Vector({
+            source: vectorSource,
+            style: new ol.style.Style({
+                image: new ol.style.Icon({
+                  anchor: [0.5, 46],
+                  anchorXUnits: 'fraction',
+                  anchorYUnits: 'pixels',
+                  scale: 0.3,
+                  src: 'http://icons.iconarchive.com/icons/paomedia/small-n-flat/128/map-marker-icon.png'
+                })
+            })
+          });
+          map.addLayer(markerVectorLayer);
+
+          var overlay = new ol.Overlay({
+            element: document.getElementById('info'),
+            positioning: 'bottom-left'
+          });
+          overlay.setMap(map);
+
+          map.on(['singleclick'], function(evt) {
+            var feature = map.forEachFeatureAtPixel(evt.pixel, function(feature) {
+              window.open(feature.get('url'), '_blank');
+            });
+          });
+
+          map.on(['pointermove'], function(evt) {
+            var feature = map.forEachFeatureAtPixel(evt.pixel, function(feature) {
+              overlay.setPosition(evt.coordinate.map(element => element + 1));
+              overlay.getElement().innerHTML = feature.get('name');
+              return feature;
+            });
+            overlay.getElement().style.display = feature ? '' : 'none';
+            document.body.style.cursor = feature ? 'pointer' : '';
+          });
+        
+    </script>
\ No newline at end of file