Cache "not found" reverse geocoding results

[rails.git] / app / assets / javascripts / index / directions-endpoint.js

diff --git a/app/assets/javascripts/index/directions-endpoint.js b/app/assets/javascripts/index/directions-endpoint.js
index 3ffb9b498723f06363cfe1f94c246e39ec864ca9..6a3cd7c269edda3a3bdbc68f7a73e0ee68fa9683 100644 (file)
--- a/app/assets/javascripts/index/directions-endpoint.js
+++ b/app/assets/javascripts/index/directions-endpoint.js
@@ -27,15 +27,22 @@ OSM.DirectionsEndpoint = function Endpoint(map, input, iconUrl, dragCallback, ch
 
     if (endpoint.geocodeRequest) endpoint.geocodeRequest.abort();
     delete endpoint.geocodeRequest;
 
     if (endpoint.geocodeRequest) endpoint.geocodeRequest.abort();
     delete endpoint.geocodeRequest;

+    removeLatLng();
+    delete endpoint.value;
+    input.val("");

     map.removeLayer(endpoint.marker);
   };
 
   function markerDragListener(e) {
     var latlng = convertLatLngToZoomPrecision(e.target.getLatLng());
 
     map.removeLayer(endpoint.marker);
   };
 
   function markerDragListener(e) {
     var latlng = convertLatLngToZoomPrecision(e.target.getLatLng());
 

+    if (endpoint.geocodeRequest) endpoint.geocodeRequest.abort();
+    delete endpoint.geocodeRequest;
+

     setLatLng(latlng);
     setInputValueFromLatLng(latlng);
     endpoint.value = input.val();
     setLatLng(latlng);
     setInputValueFromLatLng(latlng);
     endpoint.value = input.val();

+    if (e.type === "dragend") getReverseGeocode();

     dragCallback(e.type === "drag");
   }
 
     dragCallback(e.type === "drag");
   }
 


@@ -49,26 +56,54 @@ OSM.DirectionsEndpoint = function Endpoint(map, input, iconUrl, dragCallback, ch
     endpoint.setValue(value);
   }
 
     endpoint.setValue(value);
   }
 

-  endpoint.setValue = function (value, latlng) {
+  endpoint.setValue = function (value) {
+    if (endpoint.geocodeRequest) endpoint.geocodeRequest.abort();
+    delete endpoint.geocodeRequest;
+    input.removeClass("is-invalid");
+
+    var coordinatesMatch = value.match(/^\s*([+-]?\d+(?:\.\d*)?)(?:\s+|\s*[/,]\s*)([+-]?\d+(?:\.\d*)?)\s*$/);
+    var latlng = coordinatesMatch && L.latLng(coordinatesMatch[1], coordinatesMatch[2]);
+
+    if (latlng && endpoint.cachedReverseGeocode && endpoint.cachedReverseGeocode.latlng.equals(latlng)) {
+      setLatLng(latlng);
+      if (endpoint.cachedReverseGeocode.notFound) {
+        endpoint.value = value;
+        input.addClass("is-invalid");
+      } else {
+        endpoint.value = endpoint.cachedReverseGeocode.value;
+      }
+      input.val(endpoint.value);
+      changeCallback();
+      return;
+    }
+

     endpoint.value = value;
     removeLatLng();
     endpoint.value = value;
     removeLatLng();

-    input.removeClass("is-invalid");

     input.val(value);
 
     if (latlng) {
       setLatLng(latlng);
       setInputValueFromLatLng(latlng);
     input.val(value);
 
     if (latlng) {
       setLatLng(latlng);
       setInputValueFromLatLng(latlng);

+      getReverseGeocode();

       changeCallback();
     } else if (endpoint.value) {
       getGeocode();
     }
   };
 
       changeCallback();
     } else if (endpoint.value) {
       getGeocode();
     }
   };
 

+  endpoint.swapCachedReverseGeocodes = function (otherEndpoint) {
+    var g0 = endpoint.cachedReverseGeocode;
+    var g1 = otherEndpoint.cachedReverseGeocode;
+    delete endpoint.cachedReverseGeocode;
+    delete otherEndpoint.cachedReverseGeocode;
+    if (g0) otherEndpoint.cachedReverseGeocode = g0;
+    if (g1) endpoint.cachedReverseGeocode = g1;
+  };
+

   function getGeocode() {
     var viewbox = map.getBounds().toBBoxString(); // <sw lon>,<sw lat>,<ne lon>,<ne lat>
     var geocodeUrl = OSM.NOMINATIM_URL + "search?q=" + encodeURIComponent(endpoint.value) + "&format=json&viewbox=" + viewbox;
 
   function getGeocode() {
     var viewbox = map.getBounds().toBBoxString(); // <sw lon>,<sw lat>,<ne lon>,<ne lat>
     var geocodeUrl = OSM.NOMINATIM_URL + "search?q=" + encodeURIComponent(endpoint.value) + "&format=json&viewbox=" + viewbox;
 

-    if (endpoint.geocodeRequest) endpoint.geocodeRequest.abort();

     endpoint.geocodeRequest = $.getJSON(geocodeUrl, function (json) {
       delete endpoint.geocodeRequest;
       if (json.length === 0) {
     endpoint.geocodeRequest = $.getJSON(geocodeUrl, function (json) {
       delete endpoint.geocodeRequest;
       if (json.length === 0) {


@@ -79,12 +114,30 @@ OSM.DirectionsEndpoint = function Endpoint(map, input, iconUrl, dragCallback, ch
 
       setLatLng(L.latLng(json[0]));
 
 
       setLatLng(L.latLng(json[0]));
 

+      endpoint.value = json[0].display_name;

       input.val(json[0].display_name);
 
       changeCallback();
     });
   }
 
       input.val(json[0].display_name);
 
       changeCallback();
     });
   }
 

+  function getReverseGeocode() {
+    var latlng = endpoint.latlng.clone();
+    var reverseGeocodeUrl = OSM.NOMINATIM_URL + "reverse?lat=" + latlng.lat + "&lon=" + latlng.lng + "&format=json";
+
+    endpoint.geocodeRequest = $.getJSON(reverseGeocodeUrl, function (json) {
+      delete endpoint.geocodeRequest;
+      if (!json || !json.display_name) {
+        endpoint.cachedReverseGeocode = { latlng: latlng, notFound: true };
+        return;
+      }
+
+      endpoint.value = json.display_name;
+      input.val(json.display_name);
+      endpoint.cachedReverseGeocode = { latlng: latlng, value: endpoint.value };
+    });
+  }
+

   function setLatLng(ll) {
     input
       .attr("data-lat", ll.lat)
   function setLatLng(ll) {
     input
       .attr("data-lat", ll.lat)