Migrate some core classes to PHP properties

lib/Fhp/BaseAction.php

@@ -37,29 +37,24 @@
 abstract class BaseAction implements \Serializable
 {
     /** @var int[] Stores segment numbers that were assigned to the segments returned from {@link createRequest()}. */
-    protected $requestSegmentNumbers;
+    protected ?array $requestSegmentNumbers = null;
 
     /**
-     * @var string|null Contains the name of the segment, that might need a tan, used by FinTs::execute to signal
+     * Contains the name of the segment, that might need a tan, used by FinTs::execute to signal
      * to the bank that supplying a tan is supported.
      */
-    protected $needTanForSegment = null;
+    protected ?string $needTanForSegment = null;
 
-    /**
-     * If set, the last response from the server regarding this action asked for a TAN from the user.
-     * @var TanRequest|null
-     */
-    protected $tanRequest;
+    /** If set, the last response from the server regarding this action asked for a TAN from the user. */
+    protected ?TanRequest $tanRequest = null;
 
-    /** @var bool */
-    protected $isDone = false;
+    protected bool $isDone = false;
 
     /**
      * Will be populated with the message the bank sent along with the success indication, can be used to show to
      * the user.
-     * @var string
      */
-    public $successMessage;
+    public ?string $successMessage = null;
 
     /**
      * @deprecated Beginning from PHP7.4 __unserialize is used for new generated strings, then this method is only used for previously generated strings - remove after May 2023
@@ -231,7 +226,7 @@ public function processResponse(Message $response)
     /** @return int[] */
     public function getRequestSegmentNumbers(): array
     {
-        return $this->requestSegmentNumbers;
+        return $this->requestSegmentNumbers ?? [];
     }
 
     /**

lib/Fhp/Connection.php

@@ -7,25 +7,10 @@
  */
 class Connection
 {
-    /**
-     * @var string
-     */
-    protected $url;
-
-    /**
-     * @var resource
-     */
-    protected $curlHandle;
-
-    /**
-     * @var int
-     */
-    protected $timeoutConnect = 15;
-
-    /**
-     * @var int
-     */
-    protected $timeoutResponse = 30;
+    protected string $url;
+    protected ?\CurlHandle $curlHandle = null;
+    protected int $timeoutConnect = 15;
+    protected int $timeoutResponse = 30;
 
     public function __construct(string $url, int $timeoutConnect = 15, int $timeoutResponse = 30)
     {
@@ -34,9 +19,12 @@ public function __construct(string $url, int $timeoutConnect = 15, int $timeoutR
         $this->timeoutResponse = $timeoutResponse;
     }
 
-    private function connect()
+    /**
+     * @throws CurlException When initializing cURL fails.
+     */
+    private function connect(): void
     {
-        $this->curlHandle = curl_init();
+        $this->curlHandle = curl_init() ?: throw new CurlException('Failed initializing cURL.');
 
         curl_setopt($this->curlHandle, CURLOPT_SSL_VERIFYPEER, true);
         curl_setopt($this->curlHandle, CURLOPT_SSL_VERIFYHOST, 2);
@@ -52,7 +40,7 @@ private function connect()
         curl_setopt($this->curlHandle, CURLOPT_HTTPHEADER, ['cache-control: no-cache', 'Content-Type: text/plain']);
     }
 
-    public function disconnect()
+    public function disconnect(): void
     {
         if ($this->curlHandle !== null) {
             curl_close($this->curlHandle);
@@ -76,7 +64,7 @@ public function send(string $message): string
 
         if (false === $response) {
             throw new CurlException(
-                'Failed connection to ' . $this->url . ': ' . curl_error($this->curlHandle),
+                'Failed sending to ' . $this->url . ': ' . curl_error($this->curlHandle),
                 null,
                 curl_errno($this->curlHandle),
                 curl_getinfo($this->curlHandle),

lib/Fhp/Model/StatementOfAccount/Statement.php

@@ -7,30 +7,12 @@ class Statement
     public const CD_CREDIT = 'credit';
     public const CD_DEBIT = 'debit';
 
-    /**
-     * @var array of Transaction
-     */
-    protected $transactions = [];
-
-    /**
-     * @var float
-     */
-    protected $startBalance = 0.0;
-
-    /**
-     * @var float|null
-     */
-    protected $endBalance = null;
-
-    /**
-     * @var string|null
-     */
-    protected $creditDebit = null;
-
-    /**
-     * @var \DateTime|null
-     */
-    protected $date;
+    /** @var Transaction[] */
+    protected array $transactions = [];
+    protected float $startBalance = 0.0;
+    protected ?float $endBalance = null;
+    protected ?string $creditDebit = null;
+    protected ?\DateTime $date = null;
 
     /**
      * Get transactions

lib/Fhp/Model/StatementOfAccount/StatementOfAccount.php

@@ -6,10 +6,8 @@
 
 class StatementOfAccount
 {
-    /**
-     * @var Statement[]
-     */
-    protected $statements = [];
+    /** @var Statement[] */
+    protected array $statements = [];
 
     /**
      * Get statements