From 14074a83cfba84a4421db0b3cfcd1402ec8e3fa7 Mon Sep 17 00:00:00 2001
From: rameez rami <rameespu@gmail.com>
Date: Sun, 18 Jul 2021 02:51:27 +0530
Subject: [PATCH] Typescript Interface added for params + Only unsubscribe if
 not already stopped

1. Interface added for the AutoUnsubscribe function params
2. Only unsubscribe if the subscription is not already stopped or closed.
---
 src/auto-unsubscribe.ts | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/src/auto-unsubscribe.ts b/src/auto-unsubscribe.ts
index 49a35c0..c893515 100644
--- a/src/auto-unsubscribe.ts
+++ b/src/auto-unsubscribe.ts
@@ -1,8 +1,9 @@
-const isFunction = fn => typeof fn === "function";
+const isFunction = fn => typeof fn === 'function';
 
 const doUnsubscribe = subscription => {
   subscription &&
     isFunction(subscription.unsubscribe) &&
+    (subscription.isStopped === false || subscription.closed === false) &&
     subscription.unsubscribe();
 };
 
@@ -11,11 +12,17 @@ const doUnsubscribeIfArray = subscriptionsArray => {
     subscriptionsArray.forEach(doUnsubscribe);
 };
 
+interface AutoUnsubParamType {
+  blackList?: string[];
+  arrayName?: string;
+  event?: string;
+}
+
 export function AutoUnsubscribe({
   blackList = [],
-  arrayName = "",
-  event = "ngOnDestroy"
-} = {}) {
+  arrayName = '',
+  event = 'ngOnDestroy'
+}: AutoUnsubParamType = {}) {
   return function(constructor: Function) {
     const original = constructor.prototype[event];