Add security to make not to longer cadastre request

.gitignore

@@ -28,6 +28,5 @@ config/initializers/token.rb
 doc/*.svg
 rubocop.html
 config/france_connect.yml
-vendor/**/*
 uploads/*
 

app/assets/javascripts/application.js

@@ -25,3 +25,4 @@
 //= require graham_scan.min
 //= require leaflet.freedraw
 //= require smart_listing
+//= require turf

app/assets/javascripts/carte/cadastre.js

@@ -21,17 +21,17 @@ function get_cadastre(coordinates) {
     return cadastre['cadastres'];
 }
 
-function display_cadastre(cadastre_list) {
+function display_cadastre(cadastre_array) {
     if (!cadastre_active())
         return;
 
-    cadastre_array = cadastre_list;
-
     $("#cadastre.list ul").html('');
-
     new_cadastreLayer();
 
-    if (cadastre_array.length > 0) {
+    if (cadastre_array.length == 1 && cadastre_array[0]['zoom_error'])
+        $("#cadastre.list ul").html('<li><b>Merci de dessiner une surface plus petite afin de récupérer les parcelles cadastrales.</b></li>');
+
+    else if (cadastre_array.length > 0) {
         cadastre_array.forEach(function (cadastre) {
             $("#cadastre.list ul").append('<li> Parcelle n°' + cadastre.numero + ' - Feuille ' + cadastre.code_arr + ' ' + cadastre.section + ' ' + cadastre.feuille+ '</li>');
 
@@ -56,6 +56,5 @@ function new_cadastreLayer() {
         map.removeLayer(cadastreItems);
 
     cadastreItems = new L.GeoJSON();
-
     cadastreItems.addTo(map);
 }

app/assets/javascripts/carte/carte.js

@@ -41,17 +41,42 @@ function initCarto() {
     add_event_freeDraw();
 }
 
-function default_position (){
+function default_position() {
     return {lon: LON, lat: LAT, zoom: 13}
 }
 
-function get_external_data (latLngs){
-
+function get_external_data(latLngs) {
     if (qp_active())
         display_qp(get_qp(latLngs));
 
-    if (cadastre_active())
-        display_cadastre(get_cadastre(latLngs));
+    if (cadastre_active()) {
+        cadastre_list = [];
+
+        polygons = {"type": "FeatureCollection", "features": []};
+
+        for (i = 0; i < latLngs.length; i++)
+            polygons.features.push(feature_polygon_latLngs(latLngs[i]))
+
+        if (turf.area(polygons) < 300000)
+            cadastre_list = get_cadastre(latLngs);
+        else
+            cadastre_list = [{zoom_error: true}];
+
+        display_cadastre(cadastre_list);
+    }
+}
+
+function feature_polygon_latLngs(coordinates) {
+    return ({
+        "type": "Feature",
+        "properties": {},
+        "geometry": {
+            "type": "Polygon",
+            "coordinates": [
+                JSON.parse(L.FreeDraw.Utilities.getJsonPolygons([coordinates]))['latLngs']
+            ]
+        }
+    })
 }
 
 function add_event_freeDraw() {