SqliteInstaller.php

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<?php
class SqliteInstaller extends DatabaseInstaller {
        const MINIMUM_VERSION = '3.3.7';

        public $db;

        protected $globalNames = array(
                'wgDBname',
                'wgSQLiteDataDir',
        );

        public function getName() {
                return 'sqlite';
        }

        public function isCompiled() {
                return self::checkExtension( 'pdo_sqlite' );
        }

        public function checkPrerequisites() {
                $result = Status::newGood();
                // Bail out if SQLite is too old
                $db = new DatabaseSqliteStandalone( ':memory:' );
                if ( version_compare( $db->getServerVersion(), self::MINIMUM_VERSION, '<' ) ) {
                        $result->fatal( 'config-outdated-sqlite', $db->getServerVersion(), self::MINIMUM_VERSION );
                }
                // Check for FTS3 full-text search module
                if( DatabaseSqlite::getFulltextSearchModule() != 'FTS3' ) {
                        $result->warning( 'config-no-fts3' );
                }
                return $result;
        }

        public function getGlobalDefaults() {
                if ( isset( $_SERVER['DOCUMENT_ROOT'] ) ) {
                        $path = str_replace(
                                array( '/', '\\' ),
                                DIRECTORY_SEPARATOR,
                                dirname( $_SERVER['DOCUMENT_ROOT'] ) . '/data'
                        );
                        return array( 'wgSQLiteDataDir' => $path );
                } else {
                        return array();
                }
        }

        public function getConnectForm() {
                return $this->getTextBox( 'wgSQLiteDataDir', 'config-sqlite-dir', array(), $this->parent->getHelpBox( 'config-sqlite-dir-help' ) ) .
                        $this->getTextBox( 'wgDBname', 'config-db-name', array(), $this->parent->getHelpBox( 'config-sqlite-name-help' ) );
        }

        private static function realpath( $path ) {
                $result = realpath( $path );
                if ( !$result ) {
                        return $path;
                }
                return $result;
        }

        public function submitConnectForm() {
                $this->setVarsFromRequest( array( 'wgSQLiteDataDir', 'wgDBname' ) );

                # Try realpath() if the directory already exists
                $dir = self::realpath( $this->getVar( 'wgSQLiteDataDir' ) );
                $result = self::dataDirOKmaybeCreate( $dir, true /* create? */ );
                if ( $result->isOK() ) {
                        # Try expanding again in case we've just created it
                        $dir = self::realpath( $dir );
                        $this->setVar( 'wgSQLiteDataDir', $dir );
                }
                # Table prefix is not used on SQLite, keep it empty
                $this->setVar( 'wgDBprefix', '' );
                return $result;
        }

        private static function dataDirOKmaybeCreate( $dir, $create = false ) {
                if ( !is_dir( $dir ) ) {
                        if ( !is_writable( dirname( $dir ) ) ) {
                                $webserverGroup = Installer::maybeGetWebserverPrimaryGroup();
                                if ( $webserverGroup !== null ) {
                                        return Status::newFatal( 'config-sqlite-parent-unwritable-group', $dir, dirname( $dir ), basename( $dir ), $webserverGroup );
                                } else {
                                        return Status::newFatal( 'config-sqlite-parent-unwritable-nogroup', $dir, dirname( $dir ), basename( $dir ) );
                                }
                        }

                        # Called early on in the installer, later we just want to sanity check
                        # if it's still writable
                        if ( $create ) {
                                wfSuppressWarnings();
                                $ok = wfMkdirParents( $dir, 0700, __METHOD__ );
                                wfRestoreWarnings();
                                if ( !$ok ) {
                                        return Status::newFatal( 'config-sqlite-mkdir-error', $dir );
                                }
                                # Put a .htaccess file in in case the user didn't take our advice
                                file_put_contents( "$dir/.htaccess", "Deny from all\n" );
                        }
                }
                if ( !is_writable( $dir ) ) {
                        return Status::newFatal( 'config-sqlite-dir-unwritable', $dir );
                }

                # We haven't blown up yet, fall through
                return Status::newGood();
        }

        public function openConnection() {
                global $wgSQLiteDataDir;

                $status = Status::newGood();
                $dir = $this->getVar( 'wgSQLiteDataDir' );
                $dbName = $this->getVar( 'wgDBname' );
                try {
                        # @todo FIXME: Need more sensible constructor parameters, e.g. single associative array
                        # Setting globals kind of sucks
                        $wgSQLiteDataDir = $dir;
                        $db = new DatabaseSqlite( false, false, false, $dbName );
                        $status->value = $db;
                } catch ( DBConnectionError $e ) {
                        $status->fatal( 'config-sqlite-connection-error', $e->getMessage() );
                }
                return $status;
        }

        public function needsUpgrade() {
                $dir = $this->getVar( 'wgSQLiteDataDir' );
                $dbName = $this->getVar( 'wgDBname' );
                // Don't create the data file yet
                if ( !file_exists( DatabaseSqlite::generateFileName( $dir, $dbName ) ) ) {
                        return false;
                }

                // If the data file exists, look inside it
                return parent::needsUpgrade();
        }

        public function setupDatabase() {
                $dir = $this->getVar( 'wgSQLiteDataDir' );

                # Sanity check. We checked this before but maybe someone deleted the
                # data dir between then and now
                $dir_status = self::dataDirOKmaybeCreate( $dir, false /* create? */ );
                if ( !$dir_status->isOK() ) {
                        return $dir_status;
                }

                $db = $this->getVar( 'wgDBname' );
                $file = DatabaseSqlite::generateFileName( $dir, $db );
                if ( file_exists( $file ) ) {
                        if ( !is_writable( $file ) ) {
                                return Status::newFatal( 'config-sqlite-readonly', $file );
                        }
                } else {
                        if ( file_put_contents( $file, '' ) === false ) {
                                return Status::newFatal( 'config-sqlite-cant-create-db', $file );
                        }
                }
                // nuke the unused settings for clarity
                $this->setVar( 'wgDBserver', '' );
                $this->setVar( 'wgDBuser', '' );
                $this->setVar( 'wgDBpassword', '' );
                $this->setupSchemaVars();
                return $this->getConnection();
        }

        public function createTables() {
                $status = parent::createTables();
                return $this->setupSearchIndex( $status );
        }

        public function setupSearchIndex( &$status ) {
                global $IP;

                $module = DatabaseSqlite::getFulltextSearchModule();
                $fts3tTable = $this->db->checkForEnabledSearch();
                if ( $fts3tTable && !$module ) {
                        $status->warning( 'config-sqlite-fts3-downgrade' );
                        $this->db->sourceFile( "$IP/maintenance/sqlite/archives/searchindex-no-fts.sql" );
                } elseif ( !$fts3tTable && $module == 'FTS3' ) {
                        $this->db->sourceFile( "$IP/maintenance/sqlite/archives/searchindex-fts3.sql" );
                }
                return $status;
        }

        public function getLocalSettings() {
                $dir = LocalSettingsGenerator::escapePhpString( $this->getVar( 'wgSQLiteDataDir' ) );
                return
"# SQLite-specific settings
\$wgSQLiteDataDir = \"{$dir}\";";
        }
}