adds not found check!

Author: mattxwang

lib/getProgram.js

@@ -1,5 +1,6 @@
 const firestore = require("../firebase");
 const winston = require("winston");
+const helpers = require("./helpers");
 
 /**---------getProgram--------------
  * retrieves a program document
@@ -27,7 +28,16 @@ const getProgram = async function(docID) {
       .collection("/programs")
       .doc(docID)
       .get();
-    winston.info(`Got doc. Returning...`);
+    winston.info(`Got doc. Checking if empty...`);
+    if (helpers.isObjectEmpty(doc.data())) {
+      winston.info(`Empty => doc does not exist. Returning...`);
+      winston.error(`Sketch with key ${docID} not found`);
+      return {
+        ok: false,
+        error: `Sketch with key ${docID} not found`,
+      };
+    }
+    winston.info(`Doc exists, returning...`);
     return {
       ok: true,
       sketch: doc.data(),

lib/helpers.js

@@ -0,0 +1,10 @@
+const isObjectEmpty = function(obj) {
+  for (var key in obj) {
+    if (obj.hasOwnProperty(key)) return false;
+  }
+  return true;
+};
+
+module.exports = {
+  isObjectEmpty,
+};