Include task scheduler in core

src/Extend/Console.php

@@ -15,6 +15,7 @@ use Illuminate\Contracts\Container\Container;
 class Console implements ExtenderInterface
 {
     protected $addCommands = [];
+    protected $scheduled = [];
 
     /**
      * Add a command to the console.
@@ -28,10 +29,38 @@ class Console implements ExtenderInterface
         return $this;
     }
 
+    /**
+     * Schedule a command to run on an interval.
+     *
+     * @param string $command ::class attribute of command class, which must extend Flarum\Console\AbstractCommand
+     * @param callable|string $callback
+     *
+     * The callback can be a closure or invokable class, and should accept:
+     * - \Illuminate\Console\Scheduling\Event $event
+     *
+     * The callback should apply relevant methods to $event, and does not need to return anything.
+     *
+     * @see https://laravel.com/api/8.x/Illuminate/Console/Scheduling/Event.html
+     * @see https://laravel.com/docs/8.x/scheduling#schedule-frequency-options
+     * for more information on available methods and what they do.
+     *
+     * @param array $args An array of args to call the command with.
+     */
+    public function schedule(string $command, $callback, $args = [])
+    {
+        $this->scheduled[] = compact('args', 'callback', 'command');
+
+        return $this;
+    }
+
     public function extend(Container $container, Extension $extension = null)
     {
         $container->extend('flarum.console.commands', function ($existingCommands) {
             return array_merge($existingCommands, $this->addCommands);
         });
+
+        $container->extend('flarum.console.scheduled', function ($existingScheduled) {
+            return array_merge($existingScheduled, $this->scheduled);
+        });
     }
 }