Updated ChessServer\Game\AbstractMode

src/Command/TutorFenCommand.php

@@ -12,15 +12,17 @@ public function __construct()
         $this->name = '/tutor_fen';
         $this->description = "Explains a FEN position in terms of chess concepts.";
         $this->params = [
+            // mandatory params
             'variant' => '<string>',
             'fen' => '<string>',
+            // optional params
             'startPos' => '<string>',
         ];
     }
 
     public function validate(array $argv)
     {
-        return count($argv) - 1 === count($this->params);
+        return count($argv) - 1 === count($this->params) || count($this->params) - 1;
     }
 
     public function run(ChesslaBlab $socket, array $argv, int $resourceId)

src/Game/AbstractMode.php

@@ -6,13 +6,23 @@
 use Chess\Function\StandardFunction;
 use Chess\Heuristics\FenHeuristics;
 use Chess\Movetext\NagMovetext;
+use Chess\Tutor\FenExplanation;
 use Chess\UciEngine\Stockfish;
+use Chess\Variant\Capablanca\Board as CapablancaBoard;
+use Chess\Variant\Capablanca\FEN\StrToBoard as CapablancaFenStrToBoard;
+use Chess\Variant\CapablancaFischer\Board as CapablancaFischerBoard;
+use Chess\Variant\CapablancaFischer\FEN\StrToBoard as CapablancaFischerStrToBoard;
+use Chess\Variant\Chess960\Board as Chess960Board;
+use Chess\Variant\Chess960\FEN\StrToBoard as Chess960FenStrToBoard;
+use Chess\Variant\Classical\Board as ClassicalBoard;
+use Chess\Variant\Classical\FEN\StrToBoard as ClassicalFenStrToBoard;
 use ChessServer\Game\Game;
 use ChessServer\Command\HeuristicsCommand;
 use ChessServer\Command\LegalCommand;
 use ChessServer\Command\PlayLanCommand;
 use ChessServer\Command\StockfishCommand;
 use ChessServer\Command\StockfishEvalCommand;
+use ChessServer\Command\TutorFenCommand;
 use ChessServer\Command\UndoCommand;
 use ChessServer\Exception\InternalErrorException;
 
@@ -105,6 +115,22 @@ public function res($argv, $cmd)
                     return [
                         $cmd->name => NagMovetext::glyph($nag),
                     ];
+                case TutorFenCommand::class:
+                    if ($argv[1] === Chess960Board::VARIANT) {
+                        $startPos = str_split($argv[3]);
+                        $board = (new Chess960FenStrToBoard($argv[2], $startPos))->create();
+                    } elseif ($argv[1] === CapablancaBoard::VARIANT) {
+                        $board = (new CapablancaFenStrToBoard($argv[2]))->create();
+                    } elseif ($argv[1] === CapablancaFischerBoard::VARIANT) {
+                        $startPos = str_split($argv[3]);
+                        $board = (new CapablancaFischerStrToBoard($argv[2], $startPos))->create();
+                    } elseif ($argv[1] === ClassicalBoard::VARIANT) {
+                        $board = (new ClassicalFenStrToBoard($argv[2]))->create();
+                    }
+                    $paragraph = (new FenExplanation($board))->getParagraph();
+                    return [
+                        $cmd->name => implode(' ', $paragraph),
+                    ];
                 case UndoCommand::class:
                     $board = $this->game->getBoard()->undo();
                     $this->game->setBoard($board);