makes updating Template work

web/vue/src/components/Planner.vue

@@ -82,6 +82,15 @@ Template.prototype.findIndexByKey = function(slotKey) {
   return day_idx * 3 + meal_idx;
 }
 
+Template.prototype.updateJson = function(data) {
+  var i;
+  for (i in data.items) {
+    let item = data.items[i];
+    let idx = this.findIndexByKey(item.key);
+    this.items[idx].value = item.value;
+  }
+}
+
 export default {
   name: 'Planner',
   data () {
@@ -99,7 +108,7 @@ export default {
           this.is_loading = false;
           return res.json();}
         )
-        .then((data) => this.template = data) //TODO: update
+        .then((data) => this.template.updateJson(data)) 
         .catch((err) => console.log(err));
     },
     unsetMeal: function(mealKey) {