From aba3ada87ccc3a09b43d324ed02bc9605fb86bab Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C3=ABl=20Minelli?= <michael@minelli.me>
Date: Mon, 3 Jul 2023 16:44:52 +0200
Subject: [PATCH] Add LazyVal class (lazy loading of values)
---
helpers/LazyVal.ts | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
create mode 100644 helpers/LazyVal.ts
diff --git a/helpers/LazyVal.ts b/helpers/LazyVal.ts
new file mode 100644
index 0000000..cd97f68
--- /dev/null
+++ b/helpers/LazyVal.ts
@@ -0,0 +1,26 @@
+class LazyVal<T> {
+ private val: T = null;
+
+ constructor(private valLoader: () => Promise<T>) {}
+
+ get value(): Promise<T> {
+ return new Promise<T>(async (resolve) => {
+ if (this.val === null) {
+ this.val = await this.valLoader();
+ }
+
+ resolve(this.val);
+ });
+ }
+
+ reset() {
+ this.val = null;
+ }
+
+ get isValueLoaded(): boolean {
+ return this.val !== null;
+ }
+}
+
+
+export default LazyVal;
--
GitLab