From 232fbcafa863a3c28ab907b112c5257f0b6dc8f1 Mon Sep 17 00:00:00 2001
From: Kristóf Marussy <kristof@marussy.com>
Date: Tue, 26 Oct 2021 21:40:36 +0200
Subject: chore(web): refactor websocket state machine

---
 language-web/src/main/js/utils/Timer.ts | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 language-web/src/main/js/utils/Timer.ts

(limited to 'language-web/src/main/js/utils')

diff --git a/language-web/src/main/js/utils/Timer.ts b/language-web/src/main/js/utils/Timer.ts
new file mode 100644
index 00000000..efde6633
--- /dev/null
+++ b/language-web/src/main/js/utils/Timer.ts
@@ -0,0 +1,33 @@
+export class Timer {
+  readonly callback: () => void;
+
+  readonly defaultTimeout: number;
+
+  timeout: NodeJS.Timeout | null = null;
+
+  constructor(callback: () => void, defaultTimeout = 0) {
+    this.callback = () => {
+      this.timeout = null;
+      callback();
+    };
+    this.defaultTimeout = defaultTimeout;
+  }
+
+  schedule(timeout: number | null = null): void {
+    if (this.timeout === null) {
+      this.timeout = setTimeout(this.callback, timeout || this.defaultTimeout);
+    }
+  }
+
+  reschedule(timeout: number | null = null): void {
+    this.cancel();
+    this.schedule(timeout);
+  }
+
+  cancel(): void {
+    if (this.timeout !== null) {
+      clearTimeout(this.timeout);
+      this.timeout = null;
+    }
+  }
+}
-- 
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