Implement PHPStan up to level 2

phpstan.neon

@@ -1,5 +1,5 @@
 parameters:
-	level: 1
+	level: 2
 	ignoreErrors:
 	    -
 	        identifier: new.static

src/Collections/PaginatedCollection.php

@@ -8,7 +8,7 @@
 /**
  * @template TKey of array-key
  *
- * @template-covariant TValue
+ * @template TValue
  *
  * @template-extends Collection<TKey, TValue>
  */

src/HasParsedMessage.php

@@ -6,6 +6,7 @@
 use Carbon\CarbonInterface;
 use DirectoryTree\ImapEngine\Exceptions\RuntimeException;
 use GuzzleHttp\Psr7\Utils;
+use ZBateson\MailMimeParser\Header\DateHeader;
 use ZBateson\MailMimeParser\Header\HeaderConsts;
 use ZBateson\MailMimeParser\Header\IHeader;
 use ZBateson\MailMimeParser\Header\IHeaderPart;
@@ -27,8 +28,9 @@ trait HasParsedMessage
      */
     public function date(): ?CarbonInterface
     {
-        if ($date = $this->header(HeaderConsts::DATE)?->getDateTime()) {
-            return Carbon::instance($date);
+        $dateHeader = $this->header(HeaderConsts::DATE);
+        if ($dateHeader instanceof DateHeader) {
+            return Carbon::instance($dateHeader->getDateTime());
         }
 
         return null;

src/Idle.php

@@ -6,6 +6,7 @@
 use Carbon\CarbonInterface;
 use Closure;
 use DirectoryTree\ImapEngine\Connection\Responses\UntaggedResponse;
+use DirectoryTree\ImapEngine\Connection\Tokens\Atom;
 use DirectoryTree\ImapEngine\Exceptions\Exception;
 use DirectoryTree\ImapEngine\Exceptions\ImapConnectionClosedException;
 use DirectoryTree\ImapEngine\Exceptions\ImapConnectionTimedOutException;
@@ -59,7 +60,9 @@ protected function listen(callable $callback, CarbonInterface $ttl): void
                 continue;
             }
 
-            if ($response->tokenAt(2)?->is('EXISTS')) {
+            $possibleExistsToken = $response->tokenAt(2);
+
+            if ($possibleExistsToken instanceof Atom && $possibleExistsToken->is('EXISTS')) {
                 $msgn = (int) $response->tokenAt(1)->value;
 
                 $callback($msgn);

src/MessageQuery.php

@@ -6,11 +6,13 @@
 use DirectoryTree\ImapEngine\Collections\ResponseCollection;
 use DirectoryTree\ImapEngine\Connection\ConnectionInterface;
 use DirectoryTree\ImapEngine\Connection\ImapQueryBuilder;
+use DirectoryTree\ImapEngine\Connection\Responses\Data\ListData;
 use DirectoryTree\ImapEngine\Connection\Responses\UntaggedResponse;
 use DirectoryTree\ImapEngine\Connection\Tokens\Token;
 use DirectoryTree\ImapEngine\Enums\ImapFetchIdentifier;
 use DirectoryTree\ImapEngine\Enums\ImapFlag;
 use DirectoryTree\ImapEngine\Exceptions\ImapCommandException;
+use DirectoryTree\ImapEngine\Exceptions\RuntimeException;
 use DirectoryTree\ImapEngine\Pagination\LengthAwarePaginator;
 use DirectoryTree\ImapEngine\Support\Str;
 use Illuminate\Support\Collection;
@@ -189,7 +191,8 @@ public function findOrFail(int $id, ImapFetchIdentifier $identifier = ImapFetchI
     public function find(int $id, ImapFetchIdentifier $identifier = ImapFetchIdentifier::Uid): ?MessageInterface
     {
         /** @var UntaggedResponse $response */
-        if (! $response = $this->id($id, $identifier)->first()) {
+        $response = $this->id($id, $identifier)->first();
+        if (! $response) {
             return null;
         }
 
@@ -294,6 +297,10 @@ protected function fetch(Collection $messages): array
         return $this->connection()->fetch($fetch, $uids->all())->mapWithKeys(function (UntaggedResponse $response) {
             $data = $response->tokenAt(3);
 
+            if (!$data instanceof ListData) {
+                throw new RuntimeException("Invalid data type at index 3");
+            }
+
             $uid = $data->lookup('UID')->value;
 
             return [

src/Pagination/LengthAwarePaginator.php

@@ -10,7 +10,7 @@
 /**
  * @template TKey of array-key
  *
- * @template-covariant TValue
+ * @template TValue
  *
  * @template-implements Arrayable<TKey, TValue>
  */