Fixing indented yaml

BC break: Markdown blocks don't trim starting whitespace anymore.

Author: mamazu

spec/Mamazu/DocumentationParser/Validator/Yaml/YamlValidatorSpec.php

@@ -67,4 +67,19 @@ public function it_adds_an_error_if_the_whole_document_is_invalid(
 		$result->shouldHaveCount(1);
 		$result[0]->shouldBeLike(new Error('test.md', 10, 'Invalid YAML', 'yaml'));
 	}
+
+	public function it_validates_indented_block(Parser $parser, Block $block): void
+	{
+		$block->getContent()->willReturn(<<<YAML
+    fixtures:
+        testing: 1234
+YAML);
+
+		$parser->parse(<<<YAML
+fixtures:
+    testing: 1234
+YAML);
+
+		$this->validate($block)->shouldHaveCount(0);
+	}
 }

src/Parser/Parser/MarkdownParser.php

@@ -31,7 +31,7 @@ public function parse(string $fileName): array
 					$type = substr($lineContent, 3);
 					$beginLine = $lineNumber;
 				} else {
-					$blocks[] = new Block($fileName, trim($content), $beginLine + 1, $type);
+					$blocks[] = new Block($fileName, rtrim($content), $beginLine + 1, $type);
 					$beginLine = null;
 				}
 			} else {

src/Validator/Yaml/YamlValidator.php

@@ -21,8 +21,9 @@ public function __construct(?Parser $parser = null)
 
 	public function validate(Block $block): array
 	{
+		$cleanedContent = $this->cleanContent($block->getContent());
 		try {
-			$this->parser->parse($block->getContent());
+			$this->parser->parse($cleanedContent);
 		} catch (ParseException $exception) {
 			// If the entire document is invalid $exception->getParsedLine() will be -1 so we just set it to 0
 			$line = max(0, $exception->getParsedLine());
@@ -31,4 +32,32 @@ public function validate(Block $block): array
 
 		return [];
 	}
+
+	private function cleanContent(string $content): string
+	{
+		$lineContent = explode("\n", $content);
+		$offset = 0;
+		foreach ($lineContent as $line) {
+			if ($line === '') {
+				continue;
+			}
+
+			while ($offset < strlen($line)) {
+				$char = $line[$offset];
+				if (! ctype_space($char)) {
+					break;
+				}
+				$offset++;
+			}
+			break;
+		}
+
+		return implode(
+			"\n",
+			array_map(
+				static fn (string $line): string => substr($line, $offset),
+				$lineContent
+			)
+		);
+	}
 }