Implemented timers

lib/Shell.php

@@ -16,6 +16,8 @@ class Shell
     protected $contextStack = [];
 
     protected $listeners = [];
+    
+    protected $timers = [];
 
     public function __construct()
     {
@@ -126,7 +128,26 @@ class Shell
      */
     public function addTimer($interval, callable $handler, array $userdata=[])
     {
-
+        $timer = new class($interval, $handler, $userdata) {
+            private $next;
+            private $interval;
+            private $handler;
+            private $userdata;
+            public function __construct($interval, callable $handler, array $userdata) {
+                $this->interval = $interval / 1000;
+                $this->handler = $handler;
+                $this->userdata = $userdata;
+            }
+            public function update() {
+                $now = microtime(true);
+                if ($now > $this->next) {
+                    $this->next = $now + $this->interval;
+                    call_user_func($this->handler, $this->userdata);
+                }
+            }
+        };
+        $this->timers[] = $timer;
+        return $timer;
     }
 
     /**
@@ -287,6 +308,9 @@ class Shell
             // Execute the buffer
             ob_start();
             $this->dispatchEvent("update");
+            foreach ($this->timers as $timer) {
+                $timer->update();
+            }
             if ($buffer) {
                 $this->executeBuffer($buffer);
             }