merge objects from getVars plugin method

Author: nleush

lib/core.js

@@ -944,19 +944,42 @@
                     for(var key in r.data) {
                         var v = r.data[key];
 
+                        // TODO: work with arrays?
                         if (v !== '' && v !== null && ((typeof v === 'string' && !/^\s+$/.test(v)) || typeof v === 'number' || typeof v === 'object')) {
 
                             // Check meta plugins order.
                             allResults.vars._sources = allResults.vars._sources || {};
 
-                            var prevOrder = null, nextOrder = null, pluginId = allResults.vars._sources[key];
+                            var prevOrder = null, nextOrder = null, prevPluginId = allResults.vars._sources[key];
 
-                            if (pluginId && plugins[pluginId] && plugins[r.method.pluginId]) {
-                                prevOrder = plugins[pluginId].order;
+                            if (prevPluginId && plugins[prevPluginId] && plugins[r.method.pluginId]) {
+                                prevOrder = plugins[prevPluginId].order;
                                 nextOrder = plugins[r.method.pluginId].order;
                             }
 
-                            if (!prevOrder || !nextOrder || prevOrder < nextOrder) {
+                            var oldValue = allResults.vars[key];
+
+                            var newValueOverrides = !prevOrder || !nextOrder || prevOrder < nextOrder;
+
+                            if (typeof v === 'object' && typeof oldValue === 'object') {
+
+                                if (newValueOverrides) {
+                                    // Override existing object.
+                                    Object.assign(oldValue, v);
+                                } else {
+                                    // Reassign with old values on top.
+                                    allResults.vars[key] = Object.assign(v, oldValue);
+                                }
+
+                                if (!Array.isArray(allResults.vars._sources[key])) {
+                                    // Convert sources list to array.
+                                    allResults.vars._sources[key] = [allResults.vars._sources[key]];
+                                }
+                                allResults.vars._sources[key].push(r.method.pluginId);
+                                    
+                            } else if (newValueOverrides) {
+
+                                // Assign new non object value.
                                 allResults.vars[key] = v;
                                 allResults.vars._sources[key] = r.method.pluginId;
                             }