Set marker coordinates as map center when map location fields has valid coordinates

When a user recovers a page from browser history where placed a
marker in different map pane (visible map layer) marker was
successfully added to the map but the map center is the one
defined at Settings map properties so the marker was not visible
to the user.

Now when map_location form has valid coordinates we use them
instead of default map center settings. This will avoid the user to
have to rellocate the marker (or find the correct pane where the
marker was added) if already placed.

app/assets/javascripts/map.js

@@ -20,14 +20,12 @@
       App.Map.maps = [];
     },
     initializeMap: function(element) {
-      var addMarkerInvestments, clearFormfields, createMarker, editable, formCoordinates, getPopupContent,
-        latitudeInputSelector, longitudeInputSelector, map, mapAttribution, mapCenterLatLng,
+      var addMarkerInvestments, clearFormfields, createMarker, dataCoordinates, editable, formCoordinates,
+        getPopupContent, latitudeInputSelector, longitudeInputSelector, map, mapAttribution, mapCenterLatLng,
         mapCenterLatitude, mapCenterLongitude, mapTilesProvider, marker, markerIcon, markerLatitude,
         markerLongitude, moveOrPlaceMarker, openMarkerPopup, removeMarker, removeMarkerSelector,
         updateFormfields, zoom, zoomInputSelector;
       App.Map.cleanInvestmentCoordinates(element);
-      mapCenterLatitude = $(element).data("map-center-latitude");
-      mapCenterLongitude = $(element).data("map-center-longitude");
       mapTilesProvider = $(element).data("map-tiles-provider");
       mapAttribution = $(element).data("map-tiles-provider-attribution");
       latitudeInputSelector = $(element).data("latitude-input-selector");
@@ -38,12 +36,23 @@
         long: $(longitudeInputSelector).val(),
         zoom: $(zoomInputSelector).val()
       };
+      dataCoordinates = {
+        lat: $(element).data("marker-latitude"),
+        long: $(element).data("marker-longitude")
+      };
       if (App.Map.validCoordinates(formCoordinates)) {
         markerLatitude = formCoordinates.lat;
         markerLongitude = formCoordinates.long;
+        mapCenterLatitude = formCoordinates.lat;
+        mapCenterLongitude = formCoordinates.long;
+      } else if (App.Map.validCoordinates(dataCoordinates)) {
+        markerLatitude = dataCoordinates.lat;
+        markerLongitude = dataCoordinates.long;
+        mapCenterLatitude = dataCoordinates.lat;
+        mapCenterLongitude = dataCoordinates.lat;
       } else {
-        markerLatitude = $(element).data("marker-latitude");
-        markerLongitude = $(element).data("marker-longitude");
+        mapCenterLatitude = $(element).data("map-center-latitude");
+        mapCenterLongitude = $(element).data("map-center-longitude");
       }
       if (App.Map.validZoom(formCoordinates.zoom)) {
         zoom = formCoordinates.zoom;

spec/shared/system/mappable.rb

@@ -134,6 +134,38 @@ shared_examples "mappable" do |mappable_factory_name, mappable_association_name,
           expect(page.execute_script("return App.Map.maps[0].getZoom();")).to eq(11)
         end
       end
+
+      scenario "shows marker at map center", :js do
+        do_login_for user
+        visit send(mappable_new_path, arguments)
+
+        within ".map_location" do
+          expect(page).not_to have_css(".map-icon")
+        end
+
+        place_map_at(-68.592487, -62.391357)
+        find("#new_map_location").click
+
+        within ".map_location" do
+          expect(page).to have_css(".map-icon")
+        end
+
+        if management
+          click_link "Select user"
+
+          expect(page).to have_content "User management"
+        else
+          click_link "Help"
+
+          expect(page).to have_content "CONSUL is a platform for citizen participation"
+        end
+
+        go_back
+
+        within ".map_location" do
+          expect(page).to have_css(".map-icon")
+        end
+      end
     end
 
     scenario "Skip map", :js do
@@ -335,3 +367,11 @@ def map_zoom_in
     sleep 0.01
   end
 end
+
+def place_map_at(latitude, longitude)
+  page.execute_script("App.Map.maps[0].setView(new L.LatLng(#{latitude}, #{longitude}))")
+
+  until page.execute_script("return App.Map.maps[0].getCenter().lat === #{latitude};") do
+    sleep 0.01
+  end
+end