Befor generating

2026-06-01 13:17:37 +02:00
parent 3383f4bf4a
commit 1aa1b5f625
6756 changed files with 649946 additions and 1 deletions
@@ -0,0 +1,40 @@
+/**
+ * Test if a value is a plain object.
+ * @param {*} val - A value.
+ * @return {boolean} true if `val` is a plain object.
+ */
+const isObject = val =>
+  val != null && typeof val === 'object' && Array.isArray(val) === false;
+
+/**
+ * Apply a JSON merge patch. The origin is *not* modified, but unchanged
+ * properties will be recycled.
+ * 
+ * @param {*} origin - The value to patch.
+ * @param {*} patch - An [RFC 7396](https://tools.ietf.org/html/rfc7396) patch.
+ * @return {*} The patched value.
+ */
+export function apply(origin, patch) {
+  if (!isObject(patch)) {
+    // If the patch is not an object, it replaces the origin.
+    return patch;
+  }
+
+  const result = !isObject(origin)
+    ? // Non objects are being replaced.
+      {}
+    : // Make sure we never modify the origin.
+      Object.assign({}, origin);
+
+  Object.keys(patch).forEach(key => {
+    const patchVal = patch[key];
+    if (patchVal === null) {
+      delete result[key];
+    } else {
+      result[key] = apply(result[key], patchVal);
+    }
+  });
+  return result;
+}
+
+export default apply;