1 files changed, 119 insertions, 0 deletions
diff --git a/www/wiki/includes/registration/ExtensionJsonValidator.php b/www/wiki/includes/registration/ExtensionJsonValidator.php
new file mode 100644
index 00000000..7e3afaa8
--- /dev/null
+++ b/www/wiki/includes/registration/ExtensionJsonValidator.php
@@ -0,0 +1,119 @@
+<?php
+
+/**
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+use Composer\Spdx\SpdxLicenses;
+use JsonSchema\Validator;
+
+/**
+ * @since 1.29
+ */
+class ExtensionJsonValidator {
+
+	/**
+	 * @var callable
+	 */
+	private $missingDepCallback;
+
+	/**
+	 * @param callable $missingDepCallback
+	 */
+	public function __construct( callable $missingDepCallback ) {
+		$this->missingDepCallback = $missingDepCallback;
+	}
+
+	/**
+	 * @codeCoverageIgnore
+	 * @return bool
+	 */
+	public function checkDependencies() {
+		if ( !class_exists( Validator::class ) ) {
+			call_user_func( $this->missingDepCallback,
+				'The JsonSchema library cannot be found, please install it through composer.'
+			);
+			return false;
+		} elseif ( !class_exists( SpdxLicenses::class ) ) {
+			call_user_func( $this->missingDepCallback,
+				'The spdx-licenses library cannot be found, please install it through composer.'
+			);
+			return false;
+		}
+
+		return true;
+	}
+
+	/**
+	 * @param string $path file to validate
+	 * @return bool true if passes validation
+	 * @throws ExtensionJsonValidationError on any failure
+	 */
+	public function validate( $path ) {
+		$data = json_decode( file_get_contents( $path ) );
+		if ( !is_object( $data ) ) {
+			throw new ExtensionJsonValidationError( "$path is not valid JSON" );
+		}
+
+		if ( !isset( $data->manifest_version ) ) {
+			throw new ExtensionJsonValidationError(
+				"$path does not have manifest_version set." );
+		}
+
+		$version = $data->manifest_version;
+		$schemaPath = __DIR__ . "/../../docs/extension.schema.v$version.json";
+
+		// Not too old
+		if ( $version < ExtensionRegistry::OLDEST_MANIFEST_VERSION ) {
+			throw new ExtensionJsonValidationError(
+				"$path is using a non-supported schema version"
+			);
+		} elseif ( $version > ExtensionRegistry::MANIFEST_VERSION ) {
+			throw new ExtensionJsonValidationError(
+				"$path is using a non-supported schema version"
+			);
+		}
+
+		$licenseError = false;
+		// Check if it's a string, if not, schema validation will display an error
+		if ( isset( $data->{'license-name'} ) && is_string( $data->{'license-name'} ) ) {
+			$licenses = new SpdxLicenses();
+			$valid = $licenses->validate( $data->{'license-name'} );
+			if ( !$valid ) {
+				$licenseError = '[license-name] Invalid SPDX license identifier, '
+					. 'see <https://spdx.org/licenses/>';
+			}
+		}
+
+		$validator = new Validator;
+		$validator->check( $data, (object)[ '$ref' => 'file://' . $schemaPath ] );
+		if ( $validator->isValid() && !$licenseError ) {
+			// All good.
+			return true;
+		} else {
+			$out = "$path did not pass validation.\n";
+			foreach ( $validator->getErrors() as $error ) {
+				$out .= "[{$error['property']}] {$error['message']}\n";
+			}
+			if ( $licenseError ) {
+				$out .= "$licenseError\n";
+			}
+			throw new ExtensionJsonValidationError( $out );
+		}
+	}
+}