From 8535df8a20c4a1b8c084b1d9cb903c3b246ab5a3 Mon Sep 17 00:00:00 2001
From: Rafa Mel <melrcm@gmx.net>
Date: Wed, 17 Feb 2021 13:30:23 +0100
Subject: [PATCH] feat(utils): adds isCancelled

---
 src/index.ts              |  1 +
 src/utils/index.ts        |  1 +
 src/utils/is-cancelled.ts | 13 +++++++++++++
 3 files changed, 15 insertions(+)
 create mode 100644 src/utils/index.ts
 create mode 100644 src/utils/is-cancelled.ts

diff --git a/src/index.ts b/src/index.ts
index 9b9d6c8..05d1708 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1 +1,2 @@
 export * from './definitions';
+export * from './utils';
diff --git a/src/utils/index.ts b/src/utils/index.ts
new file mode 100644
index 0000000..6f11fb1
--- /dev/null
+++ b/src/utils/index.ts
@@ -0,0 +1 @@
+export * from './is-cancelled';
diff --git a/src/utils/is-cancelled.ts b/src/utils/is-cancelled.ts
new file mode 100644
index 0000000..a5a9c87
--- /dev/null
+++ b/src/utils/is-cancelled.ts
@@ -0,0 +1,13 @@
+import { Context } from '../definitions';
+
+/**
+ * A promise returning function that will
+ * resolve with `true` if `context.cancellation`
+ * has finalized, and `false` otherwise.
+ */
+export async function isCancelled(context: Context): Promise<boolean> {
+  return new Promise<boolean>((resolve) => {
+    context.cancellation.finally(() => resolve(true));
+    setTimeout(() => resolve(false), 0);
+  });
+}