ExtensionJsonValidator.php

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<?php
 
use Composer\Spdx\SpdxLicenses;
use JsonSchema\Validator;
 
class ExtensionJsonValidator {
 
    private $missingDepCallback;
 
    public function __construct( callable $missingDepCallback ) {
        $this->missingDepCallback = $missingDepCallback;
    }
 
    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;
    }
 
    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 );
        }
    }
}