1 files changed, 31 insertions, 0 deletions
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);
+}