Implemented Chess\Glossary\OpenFileTerm

src/Glossary/OpenFileTerm.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace Chess\Glossary;
+
+use Chess\Variant\AbstractBoard;
+use Chess\Variant\Classical\PGN\AN\Piece;
+
+class OpenFileTerm extends AbstractTerm
+{
+    use ElaborateTermTrait;
+
+    const NAME = 'Open file';
+
+    public function __construct(AbstractBoard $board)
+    {
+        $this->board = $board;
+
+        for ($i = 0; $i < $this->board->square::SIZE['files']; $i++) {
+            $this->toElaborate[] = chr(97 + $i);
+            for ($j = 0; $j < $this->board->square::SIZE['ranks']; $j++) {
+                if ($piece = $this->board->pieceBySq($this->board->square->toAlgebraic($i, $j))) {
+                    if ($piece->id === Piece::P) {
+                        array_pop($this->toElaborate);
+                        break;
+                    }
+                }
+            }
+        }
+    }
+
+    public function elaborate(): array
+    {
+        $imploded = implode(', ', $this->toElaborate);
+
+        return [
+            "These are open files: $imploded.",
+        ];
+    }
+}

tests/unit/Glossary/OpenFileTermTest.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace Chess\Tests\Unit\Eval;
+
+use Chess\FenToBoardFactory;
+use Chess\Glossary\OpenFileTerm;
+use Chess\Tests\AbstractUnitTestCase;
+
+class OpenFileTermTest extends AbstractUnitTestCase
+{
+    /**
+     * @test
+     */
+    public function kaufman_06()
+    {
+        $expectedElaboration = [
+            "These are open files: c.",
+        ];
+
+        $board = FenToBoardFactory::create('r5k1/3n1ppp/1p6/3p1p2/3P1B2/r3P2P/PR3PP1/2R3K1 b - -');
+
+        $openFileTerm = new OpenFileTerm($board);
+
+        $this->assertSame($expectedElaboration, $openFileTerm->elaborate());
+    }
+}