installed plugin W3 Total Cache version 2.3.2

wp-content/plugins/w3-total-cache/DbCache_Environment.php

@@ -0,0 +1,175 @@
+<?php
+namespace W3TC;
+
+/**
+ * W3 PgCache plugin - administrative interface
+ */
+
+/**
+ * class DbCache_Environment
+ */
+class DbCache_Environment {
+	/**
+	 * Fixes environment in each wp-admin request
+	 *
+	 * @param Config  $config
+	 * @param bool    $force_all_checks
+	 *
+	 * @throws Util_Environment_Exceptions
+	 */
+	public function fix_on_wpadmin_request( $config, $force_all_checks ) {
+		$exs = new Util_Environment_Exceptions();
+		try {
+			if ( $config->get_boolean( 'dbcache.enabled' ) ||
+					Util_Environment::is_dbcluster() ) {
+				$this->create_addin();
+			} else {
+				$this->delete_addin();
+			}
+		} catch ( Util_WpFile_FilesystemOperationException $ex ) {
+			$exs->push( $ex );
+		}
+
+		if ( count( $exs->exceptions() ) > 0 )
+			throw $exs;
+	}
+
+	/**
+	 * Fixes environment once event occurs
+	 *
+	 * @throws Util_Environment_Exceptions
+	 */
+	public function fix_on_event( $config, $event, $old_config = null ) {
+		if ( $config->get_boolean( 'dbcache.enabled' ) &&
+			$config->get_string( 'dbcache.engine' ) == 'file' ) {
+			if ( !wp_next_scheduled( 'w3_dbcache_cleanup' ) ) {
+				wp_schedule_event( time(),
+					'w3_dbcache_cleanup', 'w3_dbcache_cleanup' );
+			}
+		} else {
+			$this->unschedule();
+		}
+	}
+
+	/**
+	 * Fixes environment after plugin deactivation
+	 *
+	 * @throws Util_Environment_Exceptions
+	 * @return array
+	 */
+	public function fix_after_deactivation() {
+		$exs = new Util_Environment_Exceptions();
+
+		try {
+			$this->delete_addin();
+		} catch ( Util_WpFile_FilesystemOperationException $ex ) {
+			$exs->push( $ex );
+		}
+
+		$this->unschedule();
+
+		if ( count( $exs->exceptions() ) > 0 )
+			throw $exs;
+	}
+
+	/**
+	 * Returns required rules for module
+	 *
+	 * @var Config $config
+	 * @return array
+	 */
+	function get_required_rules( $config ) {
+		return null;
+	}
+
+	/**
+	 * scheduling stuff
+	 */
+	private function unschedule() {
+		if ( wp_next_scheduled( 'w3_dbcache_cleanup' ) ) {
+			wp_clear_scheduled_hook( 'w3_dbcache_cleanup' );
+		}
+	}
+
+	/**
+	 * Creates add-in
+	 *
+	 * @throws Util_WpFile_FilesystemOperationException
+	 */
+	private function create_addin() {
+		$src = W3TC_INSTALL_FILE_DB;
+		$dst = W3TC_ADDIN_FILE_DB;
+
+
+		if ( $this->db_installed() ) {
+			if ( $this->is_dbcache_add_in() ) {
+				$script_data = @file_get_contents( $dst );
+				if ( $script_data == @file_get_contents( $src ) )
+					return;
+			} else if ( get_transient( 'w3tc_remove_add_in_dbcache' ) == 'yes' ) {
+				// user already manually asked to remove another plugin's add in,
+				// we should try to apply ours
+				// (in case of missing permissions deletion could fail)
+			} else if ( !$this->db_check_old_add_in() ) {
+				$page_val = Util_Request::get_string( 'page' );
+				if ( isset( $page_val ) ) {
+					$url = 'admin.php?page=' . $page_val . '&amp;';
+				} else {
+					$url = basename( Util_Environment::remove_query_all( isset( $_SERVER['REQUEST_URI'] ) ? sanitize_text_field( wp_unslash( $_SERVER['REQUEST_URI'] ) ) : '' ) ) . '?page=w3tc_dashboard&amp;';
+				}
+				$remove_url = Util_Ui::admin_url( $url . 'w3tc_default_remove_add_in=dbcache' );
+				throw new Util_WpFile_FilesystemOperationException(
+					sprintf( __( 'The Database add-in file db.php is not a W3 Total Cache drop-in.
+                Remove it or disable Database Caching. %s', 'w3-total-cache' ),
+						Util_Ui::button_link( __( 'Remove it for me', 'w3-total-cache' ), wp_nonce_url( $remove_url, 'w3tc' ) ) ) );
+			}
+		}
+
+		Util_WpFile::copy_file( $src, $dst );
+	}
+
+	/**
+	 * Deletes add-in
+	 *
+	 * @throws Util_WpFile_FilesystemOperationException
+	 */
+	private function delete_addin() {
+		if ( $this->is_dbcache_add_in() )
+			Util_WpFile::delete_file( W3TC_ADDIN_FILE_DB );
+	}
+
+	/**
+	 * Returns true if db.php is installed
+	 *
+	 * @return boolean
+	 */
+	public function db_installed() {
+		return file_exists( W3TC_ADDIN_FILE_DB );
+	}
+
+	/**
+	 * Returns true if db.php is old version.
+	 *
+	 * @return boolean
+	 */
+	public function db_check_old_add_in() {
+		if ( !$this->db_installed() )
+			return false;
+
+		return ( ( $script_data = @file_get_contents( W3TC_ADDIN_FILE_DB ) )
+			&& strstr( $script_data, 'w3_instance' ) !== false );
+	}
+
+	/**
+	 * Checks if db.php is W3TC drop in
+	 *
+	 * @return boolean
+	 */
+	public function is_dbcache_add_in() {
+		if ( !$this->db_installed() )
+			return false;
+
+		return ( ( $script_data = @file_get_contents( W3TC_ADDIN_FILE_DB ) )
+			&& strstr( $script_data, 'DbCache_Wpdb' ) !== false );
+	}
+}