Refactor more old code and get tests to pass

src/Listeners/JobPipeline.php

@@ -0,0 +1,95 @@
+<?php
+
+namespace Stancl\Tenancy\Listeners;
+
+use Closure;
+use Illuminate\Contracts\Queue\ShouldQueue;
+
+class JobPipeline implements ShouldQueue
+{
+    /** @var bool */
+    public static $queueByDefault = false;
+
+    /** @var callable[]|string[] */
+    public $jobs;
+
+    /** @var callable|null */
+    public $send;
+
+    /**
+     * A value passed to the jobs. This is the return value of $send.
+     */
+    public $passable;
+
+    /** @var bool */
+    public $queue;
+
+    public function __construct($jobs, callable $send = null, bool $queue = null)
+    {
+        $this->jobs = $jobs;
+        $this->send = $send ?? function ($event) {
+            // If no $send callback is set, we'll just pass the event through the jobs.
+            return $event;
+        };
+        $this->queue = $queue ?? static::$queueByDefault;
+    }
+
+    /** @param callable[]|string[] $jobs */
+    public static function make(array $jobs): self
+    {
+        return new static($jobs);
+    }
+
+    public function send(callable $send): self
+    {
+        $this->send = $send;
+
+        return $this;
+    }
+
+    public function queue(bool $queue)
+    {
+        $this->queue = $queue;
+
+        return $this;
+    }
+
+    public function handle(): void
+    {
+        foreach ($this->jobs as $job) {
+            app()->call([new $job(...$this->passable), 'handle']);
+        }
+    }
+
+    /**
+     * Generate a closure that can be used as a listener.
+     */
+    public function toListener(): Closure
+    {
+        return function (...$args) {
+            $executable = $this->executable($args);
+
+            if ($this->queue) {
+                dispatch($executable);
+            } else {
+                dispatch_now($executable);
+            }
+        };
+    }
+
+    /**
+     * Return a serializable version of the current object.
+     */
+    public function executable($listenerArgs): self
+    {
+        $clone = clone $this;
+
+        $passable = ($clone->send)(...$listenerArgs);
+        $passable = is_array($passable) ? $passable : [$passable];
+
+        $clone->passable = $passable;
+        unset($clone->send);
+
+        return $clone;
+    }
+}