From fca5b424d41d7126635dd67bba4aa89d1d14c14b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Anton=20Luka=20=C5=A0ijanec?= <sijanecantonluka@gmail.com>
Date: Wed, 4 Mar 2020 21:19:18 +0100
Subject: rewrite of meals.js

---
 js/lib/mergedeep.js | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 js/lib/mergedeep.js

(limited to 'js/lib')

diff --git a/js/lib/mergedeep.js b/js/lib/mergedeep.js
new file mode 100644
index 0000000..dfd0dd2
--- /dev/null
+++ b/js/lib/mergedeep.js
@@ -0,0 +1,32 @@
+// https://stackoverflow.com/questions/27936772/how-to-deep-merge-instead-of-shallow-merge
+/**
+ * Simple object check.
+ * @param item
+ * @returns {boolean}
+ */
+function isObject(item) {
+  return (item && typeof item === 'object' && !Array.isArray(item));
+}
+
+/**
+ * Deep merge two objects.
+ * @param target
+ * @param ...sources
+ */
+function mergeDeep(target, ...sources) {
+  if (!sources.length) return target;
+  const source = sources.shift();
+
+  if (isObject(target) && isObject(source)) {
+    for (const key in source) {
+      if (isObject(source[key])) {
+        if (!target[key]) Object.assign(target, { [key]: {} });
+        mergeDeep(target[key], source[key]);
+      } else {
+        Object.assign(target, { [key]: source[key] });
+      }
+    }
+  }
+
+  return mergeDeep(target, ...sources);
+}
-- 
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