1 files changed, 75 insertions, 0 deletions
diff --git a/www/wiki/extensions/SemanticMediaWiki/src/CompatibilityMode.php b/www/wiki/extensions/SemanticMediaWiki/src/CompatibilityMode.php
new file mode 100644
index 00000000..fb214f49
--- /dev/null
+++ b/www/wiki/extensions/SemanticMediaWiki/src/CompatibilityMode.php
@@ -0,0 +1,75 @@
+<?php
+
+namespace SMW;
+
+/**
+ * Internal benchmarks (XDebug) have shown that some extensions may affect the
+ * performance to a greater degree than expected and can impose a performance
+ * penalty to the overall system (templates, queries etc.).
+ *
+ * If a user is willing to incur those potential disadvantages by setting the
+ * `CompatibilityMode`, s(he) is to understand the latent possibility of those
+ * disadvantages.
+ *
+ * @license GNU GPL v2+
+ * @since 2.4
+ *
+ * @author mwjames
+ */
+class CompatibilityMode {
+
+	/**
+	 * @since 2.4
+	 *
+	 * @return boolean
+	 */
+	public static function extensionNotEnabled() {
+
+		if ( !defined( 'MW_PHPUNIT_TEST' ) ) {
+			return !$GLOBALS['smwgSemanticsEnabled'];
+		}
+
+		$GLOBALS['smwgSemanticsEnabled'] = true;
+		ApplicationFactory::getInstance()->getSettings()->set( 'smwgSemanticsEnabled', true );
+
+		return false;
+	}
+
+	/**
+	 * Allows to run `update.php` with a bare-bone setup in cases where enabledSemantics
+	 * has not yet been enabled.
+	 *
+	 * @since 2.4
+	 */
+	public static function enableTemporaryCliUpdateMode() {
+		$GLOBALS['smwgSemanticsEnabled'] = true;
+		ApplicationFactory::getInstance()->getSettings()->set( 'smwgSemanticsEnabled', true );
+		ApplicationFactory::getInstance()->getSettings()->set( 'smwgPageSpecialProperties', [ '_MDAT' ] );
+	}
+
+	/**
+	 * @since 2.4
+	 */
+	public static function disableSemantics() {
+
+		$disabledSettings = [
+			'smwgSemanticsEnabled' => false,
+			'smwgNamespacesWithSemanticLinks' => [],
+			'smwgQEnabled' => false,
+			'smwgAutoRefreshOnPurge' => false,
+			'smwgAutoRefreshOnPageMove' => false,
+			'smwgFactboxCacheRefreshOnPurge' => false,
+			'smwgAdminFeatures' => false,
+			'smwgPageSpecialProperties' => [],
+			'smwgEnableUpdateJobs' => false,
+			'smwgEnabledEditPageHelp' => false,
+			'smwgParserFeatures' => SMW_PARSER_NONE,
+		];
+
+		foreach ( $disabledSettings as $key => $value) {
+			ApplicationFactory::getInstance()->getSettings()->set( $key, $value );
+			$GLOBALS[$key] = $value;
+		}
+	}
+
+}