Refactored TutorFenCommand as non-blocking

src/Command/Game/Cli.php

@@ -13,7 +13,6 @@
 use ChessServer\Command\Game\Blocking\ResignCommand;
 use ChessServer\Command\Game\Blocking\RestartCommand;
 use ChessServer\Command\Game\Blocking\StockfishCommand;
-use ChessServer\Command\Game\Blocking\TutorFenCommand;
 use ChessServer\Command\Game\NonBlocking\AcceptPlayRequestCommand;
 use ChessServer\Command\Game\NonBlocking\AsciiCommand;
 use ChessServer\Command\Game\NonBlocking\DrawCommand;
@@ -24,6 +23,7 @@
 use ChessServer\Command\Game\NonBlocking\RematchCommand;
 use ChessServer\Command\Game\NonBlocking\StartCommand;
 use ChessServer\Command\Game\NonBlocking\TakebackCommand;
+use ChessServer\Command\Game\NonBlocking\TutorFenCommand;
 use ChessServer\Command\Game\NonBlocking\UndoCommand;
 use Spatie\Async\Pool;
 
@@ -57,6 +57,6 @@ public function __construct(Pool $pool)
         $this->commands->attach((new RestartCommand())->setPool($pool));
         $this->commands->attach(new StartCommand());
         $this->commands->attach((new StockfishCommand())->setPool($pool));
-        $this->commands->attach((new TutorFenCommand())->setPool($pool));
+        $this->commands->attach(new TutorFenCommand());
     }
 }

src/Command/Game/NonBlocking/TutorFenCommand.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace ChessServer\Command\Game\NonBlocking;
+
+use Chess\FenToBoardFactory;
+use Chess\Eval\CompleteFunction;
+use Chess\Tutor\FenEvaluation;
+use Chess\Variant\Classical\Board;
+use ChessServer\Command\AbstractNonBlockingCommand;
+use ChessServer\Socket\AbstractSocket;
+
+class TutorFenCommand extends AbstractNonBlockingCommand
+{
+    public function __construct()
+    {
+        $this->name = '/tutor_fen';
+        $this->description = 'Explains a FEN position in terms of chess concepts.';
+        $this->params = [
+            'params' => '<string>',
+        ];
+    }
+
+    public function validate(array $argv)
+    {
+        return count($argv) - 1 === count($this->params);
+    }
+
+    public function run(AbstractSocket $socket, array $argv, int $id)
+    {
+        $params = $this->params($argv[1]);
+
+        $board = FenToBoardFactory::create($params['fen'], new Board());
+        $paragraph = (new FenEvaluation(new CompleteFunction(), $board))->paragraph;
+
+        return $socket->getClientStorage()->send([$id], [
+            $this->name => implode(' ', $paragraph),
+        ]);
+    }
+}