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vendor/binsoul/net-mqtt/src/Flow/AbstractFlow.php

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+<?php
+
+namespace BinSoul\Net\Mqtt\Flow;
+
+use BinSoul\Net\Mqtt\Flow;
+use BinSoul\Net\Mqtt\Packet;
+
+/**
+ * Provides an abstract implementation of the {@see Flow} interface.
+ */
+abstract class AbstractFlow implements Flow
+{
+    /** @var bool */
+    private $isFinished = false;
+    /** @var bool */
+    private $isSuccess = false;
+    /** @var mixed */
+    private $result;
+    /** @var string */
+    private $error = '';
+
+    public function accept(Packet $packet)
+    {
+        return false;
+    }
+
+    public function next(Packet $packet)
+    {
+    }
+
+    public function isFinished()
+    {
+        return $this->isFinished;
+    }
+
+    public function isSuccess()
+    {
+        return $this->isFinished && $this->isSuccess;
+    }
+
+    public function getResult()
+    {
+        return $this->result;
+    }
+
+    public function getErrorMessage()
+    {
+        return $this->error;
+    }
+
+    /**
+     * Marks the flow as successful and sets the result.
+     *
+     * @param mixed|null $result
+     */
+    protected function succeed($result = null)
+    {
+        $this->isFinished = true;
+        $this->isSuccess = true;
+        $this->result = $result;
+    }
+
+    /**
+     * Marks the flow as failed and sets the error message.
+     *
+     * @param string $error
+     */
+    protected function fail($error = '')
+    {
+        $this->isFinished = true;
+        $this->isSuccess = false;
+        $this->error = $error;
+    }
+}