Move HAproxy exceptions into their own class, and downgrade HAproxy errors since they are handled

app/Classes/Sock/Exception/SocketException.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace App\Classes\Sock\Exception;
+
+// @todo Can we change this to use socket_strerr() && socket_last_error()
+final class SocketException extends \Exception {
+	public const CANT_CREATE_SOCKET = 1;
+	public const CANT_BIND_SOCKET	= 2;
+	public const CANT_LISTEN		= 3;
+	public const CANT_ACCEPT		= 4;
+	public const CANT_CONNECT		= 5;
+	public const SOCKET_ERROR		= 6;
+	public const SOCKET_EAGAIN		= 11;
+	public const SOCKET_READ		= 22;
+	public const CONNECTION_RESET	= 104;
+
+	private array $messages = [
+		self::CANT_CREATE_SOCKET	=> 'Can\'t create socket: "%s"',
+		self::CANT_BIND_SOCKET		=> 'Can\'t bind socket: "%s"',
+		self::CANT_LISTEN			=> 'Can\'t listen: "%s"',
+		self::CANT_ACCEPT			=> 'Can\'t accept connections: "%s"',
+		self::CANT_CONNECT			=> 'Can\'t connect: "%s"',
+		self::SOCKET_ERROR			=> 'Socket Error: "%s"',
+		self::SOCKET_EAGAIN			=> 'Socket Resource Temporarily Unavailable - Try again',
+		self::SOCKET_READ			=> 'Unable to read from socket',
+		self::CONNECTION_RESET		=> 'Connection reset by peer',
+	];
+
+	public function __construct(int $code,string $params=NULL) {
+		$message = $params
+			? call_user_func_array('sprintf',[$this->messages[$code],$params])
+			: $this->messages[$code];
+
+		parent::__construct($message,$code);
+	}
+}