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packages/lib/Queue.ts

@@ -0,0 +1,57 @@
+export class Queue {
+  timeout?: number
+  messages: any[] = []
+
+  clear() {
+    this.messages = []
+  }
+
+  push(message: any) {
+    this.messages.push(message)
+    this.enqueueWork()
+  }
+
+  handle(message: any) {
+    throw new Error("Not implemented")
+  }
+
+  shouldSend(message: any) {
+    return true
+  }
+
+  doWork() {
+    for (let i = 0; i < 10; i++) {
+      if (this.messages.length === 0) {
+        break
+      }
+
+      // Pop the messages one at a time so handle can modify the queue
+      const [message] = this.messages.splice(0, 1)
+
+      if (this.shouldSend(message)) {
+        this.handle(message)
+      } else {
+        this.messages.push(message)
+      }
+    }
+
+    this.timeout = undefined
+    this.enqueueWork()
+  }
+
+  enqueueWork() {
+    if (this.timeout) {
+      return
+    }
+
+    if (this.messages.length === 0) {
+      return
+    }
+
+    this.timeout = setTimeout(() => this.doWork(), 100)
+  }
+
+  stop() {
+    clearTimeout(this.timeout)
+  }
+}