Merge pull request #248 from CartoDB/196-validate-layergroup-in-named-maps

Basic layergroup validation on named map creation/update

lib/cartodb/template_maps.js

@@ -106,6 +106,11 @@ o._checkInvalidTemplate = function(template) {
     return new Error("Invalid characters in template name '" + tplname + "'");
   }
 
+  var invalidError = isInvalidLayergroup(template.layergroup);
+  if (invalidError) {
+    return invalidError;
+  }
+
   var placeholders = template.placeholders || {};
 
   var placeholderKeys = Object.keys(placeholders);
@@ -142,6 +147,32 @@ o._checkInvalidTemplate = function(template) {
     return false;
 };
 
+function isInvalidLayergroup(layergroup) {
+    if (!layergroup) {
+        return new Error('Missing layergroup');
+    }
+
+    var layers = layergroup.layers;
+
+    if (!_.isArray(layers) || layers.length === 0) {
+        return new Error('Missing or empty layers array from layergroup config');
+    }
+
+    var invalidLayers = layers
+        .map(function(layer, layerIndex) {
+            return layer.options ? null : layerIndex;
+        })
+        .filter(function(layerIndex) {
+            return layerIndex !== null;
+        });
+
+    if (invalidLayers.length) {
+        return new Error('Missing `options` in layergroup config for layers: ' + invalidLayers.join(', '));
+    }
+
+    return false;
+}
+
 function templateDefaults(template) {
     var templateAuth = _.defaults({}, template.auth || {}, {
         method: 'open'