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-rw-r--r--includes/registration/CoreVersionChecker.php68
1 files changed, 68 insertions, 0 deletions
diff --git a/includes/registration/CoreVersionChecker.php b/includes/registration/CoreVersionChecker.php
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+<?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
+ */
+
+use Composer\Semver\VersionParser;
+use Composer\Semver\Constraint\Constraint;
+
+/**
+ * @since 1.26
+ */
+class CoreVersionChecker {
+
+ /**
+ * @var Constraint|bool representing $wgVersion
+ */
+ private $coreVersion = false;
+
+ /**
+ * @var VersionParser
+ */
+ private $versionParser;
+
+ /**
+ * @param string $coreVersion Current version of core
+ */
+ public function __construct( $coreVersion ) {
+ $this->versionParser = new VersionParser();
+ try {
+ $this->coreVersion = new Constraint(
+ '==',
+ $this->versionParser->normalize( $coreVersion )
+ );
+ } catch ( UnexpectedValueException $e ) {
+ // Non-parsable version, don't fatal.
+ }
+ }
+
+ /**
+ * Check that the provided constraint is compatible with the current version of core
+ *
+ * @param string $constraint Something like ">= 1.26"
+ * @return bool
+ */
+ public function check( $constraint ) {
+ if ( $this->coreVersion === false ) {
+ // Couldn't parse the core version, so we can't check anything
+ return true;
+ }
+
+ return $this->versionParser->parseConstraints( $constraint )
+ ->matches( $this->coreVersion );
+ }
+}