From 1605e743f44b835e99b3403cb3cfc5018b697d26 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Thu, 19 Mar 2020 23:12:13 +0100
Subject: editor: experiment with Material UI for sprite library implementation

---
 src/renderer/editor/util.ts | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 src/renderer/editor/util.ts

(limited to 'src/renderer/editor/util.ts')

diff --git a/src/renderer/editor/util.ts b/src/renderer/editor/util.ts
new file mode 100644
index 0000000..b2331bb
--- /dev/null
+++ b/src/renderer/editor/util.ts
@@ -0,0 +1,31 @@
+import { useCallback, useEffect, useState } from 'react';
+
+import * as fs from 'fs';
+
+export function usePromise<T>(f: () => Promise<T>): T | null {
+	const [value, setValue] = useState<T | null>(null);
+
+	useEffect(() => {
+		setValue(null);
+
+		let cancelled = false;
+
+		(async (): Promise<void> => {
+			const v = await f();
+			if (!cancelled) {
+				setValue(v);
+			}
+		})();
+
+		return (): void => {
+			cancelled = true;
+		};
+	}, [f]);
+
+	return value;
+}
+
+export function useReadFile(path: string, encoding: BufferEncoding): string | null {
+	const readFile = useCallback(() => fs.promises.readFile(path, encoding), [path, encoding]);
+	return usePromise(readFile);
+}
-- 
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