Initial commit

lib/assets/javascripts/builder/helpers/fetch-all-query-objects.js

@@ -0,0 +1,40 @@
+/**
+ *  Fetch all query objects (querySchemaModel, queryGeometryModel, queryRowsCollection)
+ *  if necessary
+ */
+
+module.exports = function (params) {
+  if (!params) throw new Error('all query objects are required');
+  if (!params.querySchemaModel) throw new Error('querySchemaModel is required');
+  if (!params.queryGeometryModel) throw new Error('queryGeometryModel is required');
+  if (!params.queryRowsCollection) throw new Error('queryRowsCollection is required');
+
+  function fetchModel (model) {
+    return new Promise(function (resolve, reject) {
+      var subscribeToFinalStatus = false;
+
+      if (model.shouldFetch()) {
+        model.fetch();
+        subscribeToFinalStatus = true;
+      } else if (!model.isInFinalStatus()) {
+        subscribeToFinalStatus = true;
+      } else {
+        resolve();
+      }
+
+      if (subscribeToFinalStatus) {
+        model.once('inFinalStatus', function () {
+          resolve();
+        });
+      }
+    });
+  }
+
+  var schemaModelPromise = fetchModel(params.querySchemaModel);
+  var geometryModelPromise = fetchModel(params.queryGeometryModel);
+
+  return Promise.all([schemaModelPromise, geometryModelPromise])
+    .then(function () {
+      return fetchModel(params.queryRowsCollection); // rows collection depends on schema
+    });
+};