1 files changed, 49 insertions, 0 deletions
diff --git a/MLEB/Translate/src/Validation/Validators/GettextNewlineValidator.php b/MLEB/Translate/src/Validation/Validators/GettextNewlineValidator.php
new file mode 100644
index 00000000..3b52859d
--- /dev/null
+++ b/MLEB/Translate/src/Validation/Validators/GettextNewlineValidator.php
@@ -0,0 +1,49 @@
+<?php
+declare( strict_types = 1 );
+
+namespace MediaWiki\Extension\Translate\Validation\Validators;
+
+use MediaWiki\Extension\Translate\Validation\ValidationIssues;
+use TMessage;
+
+/**
+ * Ensures that the translation has the same number of newlines as the source
+ * message at the beginning and end of the string. This works specifically
+ * for GettextFFS.
+ * @author Abijeet Patro
+ * @license GPL-2.0-or-later
+ * @since 2019.09
+ */
+class GettextNewlineValidator extends NewlineValidator {
+	public function getIssues( TMessage $message, string $targetLanguage ): ValidationIssues {
+		$translation = $message->translation();
+		$definition = $message->definition();
+
+		// ending newlines in GetText are bounded by a "\"
+		$definition = $this->removeTrailingSlash( $definition );
+		$translation = $this->removeTrailingSlash( $translation );
+
+		$definitionStartNewline = $this->getStartingNewLinesCount( $definition );
+		$definitionEndNewline = $this->getEndingNewLineCount( $definition );
+
+		$translationStartNewline = $this->getStartingNewLinesCount( $translation );
+		$translationEndNewline = $this->getEndingNewLineCount( $translation );
+
+		$failingChecks = array_merge(
+			$this->validateStartingNewline( $definitionStartNewline, $translationStartNewline ),
+			$this->validateEndingNewline( $definitionEndNewline, $translationEndNewline )
+		);
+
+		return $this->createIssues( $failingChecks );
+	}
+
+	private function removeTrailingSlash( string $str ): string {
+		if ( substr( $str, -strlen( '\\' ) ) === '\\' ) {
+			return substr( $str, 0, -1 );
+		}
+
+		return $str;
+	}
+}
+
+class_alias( GettextNewlineValidator::class, '\MediaWiki\Extensions\Translate\GettextNewlineValidator' );