OracleInstaller.php

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<?php
class OracleInstaller extends DatabaseInstaller {

        protected $globalNames = array(
                'wgDBserver',
                'wgDBname',
                'wgDBuser',
                'wgDBpassword',
                'wgDBprefix',
        );

        protected $internalDefaults = array(
                '_OracleDefTS' => 'USERS',
                '_OracleTempTS' => 'TEMP',
                '_InstallUser' => 'SYSDBA',
        );

        public $minimumVersion = '9.0.1'; // 9iR1

        protected $connError = null;

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

        public function isCompiled() {
                return self::checkExtension( 'oci8' );
        }

        public function getConnectForm() {
                if ( $this->getVar( 'wgDBserver' ) == 'localhost' ) {
                        $this->parent->setVar( 'wgDBserver', '' );
                }
                return
                        $this->getTextBox( 'wgDBserver', 'config-db-host-oracle', array(), $this->parent->getHelpBox( 'config-db-host-oracle-help' ) ) .
                        Html::openElement( 'fieldset' ) .
                        Html::element( 'legend', array(), wfMsg( 'config-db-wiki-settings' ) ) .
                        $this->getTextBox( 'wgDBprefix', 'config-db-prefix' ) .
                        $this->getTextBox( '_OracleDefTS', 'config-oracle-def-ts' ) .
                        $this->getTextBox( '_OracleTempTS', 'config-oracle-temp-ts', array(), $this->parent->getHelpBox( 'config-db-oracle-help' ) ) .
                        Html::closeElement( 'fieldset' ) .
                        $this->parent->getWarningBox( wfMsg( 'config-db-account-oracle-warn' ) ).
                        $this->getInstallUserBox().
                        $this->getWebUserBox();
        }

        public function submitInstallUserBox() {
                parent::submitInstallUserBox();
                $this->parent->setVar( '_InstallDBname', $this->getVar( '_InstallUser' ) );
                return Status::newGood();
        }

        public function submitConnectForm() {
                // Get variables from the request
                $newValues = $this->setVarsFromRequest( array( 'wgDBserver', 'wgDBprefix', 'wgDBuser', 'wgDBpassword' ) );
                $this->parent->setVar( 'wgDBname', $this->getVar( 'wgDBuser' ) );

                // Validate them
                $status = Status::newGood();
                if ( !strlen( $newValues['wgDBserver'] ) ) {
                        $status->fatal( 'config-missing-db-server-oracle' );
                } elseif ( !preg_match( '/^[a-zA-Z0-9_\.]+$/', $newValues['wgDBserver'] ) ) {
                        $status->fatal( 'config-invalid-db-server-oracle', $newValues['wgDBserver'] );
                }
                if ( !preg_match( '/^[a-zA-Z0-9_]*$/', $newValues['wgDBprefix'] ) ) {
                        $status->fatal( 'config-invalid-schema', $newValues['wgDBprefix'] );
                }
                if ( !$status->isOK() ) {
                        return $status;
                }

                // Submit user box
                $status = $this->submitInstallUserBox();
                if ( !$status->isOK() ) {
                        return $status;
                }

                // Try to connect trough multiple scenarios
                // Scenario 1: Install with a manually created account
                $status = $this->getConnection();
                if ( !$status->isOK() ) {
                        if ( $this->connError == 28009 ) {
                                // _InstallUser seems to be a SYSDBA
                                // Scenario 2: Create user with SYSDBA and install with new user
                                $status = $this->submitWebUserBox();
                                if ( !$status->isOK() ) {
                                        return $status;
                                }
                                $status = $this->openSYSDBAConnection();
                                if ( !$status->isOK() ) {
                                        return $status;
                                }
                                if ( !$this->getVar( '_CreateDBAccount' ) ) {
                                        $status->fatal('config-db-sys-create-oracle');
                                }
                        } else {
                                return $status;
                        }
                } else {
                        // check for web user credentials
                        // Scenario 3: Install with a priviliged user but use a restricted user
                        $statusIS3 = $this->submitWebUserBox();
                        if ( !$statusIS3->isOK() ) {
                                return $statusIS3;
                        }
                }

                $conn = $status->value;

                // Check version
                $version = $conn->getServerVersion();
                if ( version_compare( $version, $this->minimumVersion ) < 0 ) {
                        return Status::newFatal( 'config-oracle-old', $this->minimumVersion, $version );
                }

                return $status;
        }

        public function openConnection() {
                $status = Status::newGood();
                try {
                        $db = new DatabaseOracle(
                                $this->getVar( 'wgDBserver' ),
                                $this->getVar( '_InstallUser' ),
                                $this->getVar( '_InstallPassword' ),
                                $this->getVar( '_InstallDBname' ),
                                0,
                                $this->getVar( 'wgDBprefix' )
                        );
                        $status->value = $db;
                } catch ( DBConnectionError $e ) {
                        $this->connError = $e->db->lastErrno();
                        $status->fatal( 'config-connection-error', $e->getMessage() );
                }
                return $status;
        }

        public function openSYSDBAConnection() {
                $status = Status::newGood();
                try {
                        $db = new DatabaseOracle(
                                $this->getVar( 'wgDBserver' ),
                                $this->getVar( '_InstallUser' ),
                                $this->getVar( '_InstallPassword' ),
                                $this->getVar( '_InstallDBname' ),
                                DBO_SYSDBA,
                                $this->getVar( 'wgDBprefix' )
                        );
                        $status->value = $db;
                } catch ( DBConnectionError $e ) {
                        $this->connError = $e->db->lastErrno();
                        $status->fatal( 'config-connection-error', $e->getMessage() );
                }
                return $status;
        }

        public function needsUpgrade() {
                $tempDBname = $this->getVar( 'wgDBname' );
                $this->parent->setVar( 'wgDBname', $this->getVar( 'wgDBuser' ) );
                $retVal = parent::needsUpgrade();
                $this->parent->setVar( 'wgDBname', $tempDBname );
                return $retVal;
        }

        public function preInstall() {
                # Add our user callback to installSteps, right before the tables are created.
                $callback = array(
                        'name' => 'user',
                        'callback' => array( $this, 'setupUser' )
                );
                $this->parent->addInstallStep( $callback, 'database' );
        }


        public function setupDatabase() {
                $status = Status::newGood();
                return $status;
        }

        public function setupUser() {
                global $IP;

                if ( !$this->getVar( '_CreateDBAccount' ) ) {
                        return Status::newGood();
                }

                // normaly only SYSDBA users can create accounts
                $status = $this->openSYSDBAConnection();
                if ( !$status->isOK() ) {
                        if ( $this->connError == 1031 ) {
                                // insufficient  privileges (looks like a normal user)
                                $status = $this->openConnection();
                                if ( !$status->isOK() ) {
                                        return $status;
                                }
                        } else {
                                return $status;
                        }
                }
                $this->db = $status->value;
                $this->setupSchemaVars();

                if ( !$this->db->selectDB( $this->getVar( 'wgDBuser' ) ) ) {
                        $this->db->setFlag( DBO_DDLMODE );
                        $error = $this->db->sourceFile( "$IP/maintenance/oracle/user.sql" );
                        if ( $error !== true || !$this->db->selectDB( $this->getVar( 'wgDBuser' ) ) ) {
                                $status->fatal( 'config-install-user-failed', $this->getVar( 'wgDBuser' ), $error );
                        }
                } elseif ( $this->db->getFlag( DBO_SYSDBA ) ) {
                        $status->fatal( 'config-db-sys-user-exists-oracle', $this->getVar( 'wgDBuser' ) );
                }

                if ($status->isOK()) {
                        // user created or already existing, switching back to a normal connection
                        // as the new user has all needed privileges to setup the rest of the schema
                        // i will be using that user as _InstallUser from this point on
                        $this->db->close();
                        $this->db = false;
                        $this->parent->setVar( '_InstallUser', $this->getVar( 'wgDBuser' ) );
                        $this->parent->setVar( '_InstallPassword', $this->getVar( 'wgDBpassword' ) );
                        $this->parent->setVar( '_InstallDBname', $this->getVar( 'wgDBuser' ) );
                        $status = $this->getConnection();
                }

                return $status;
        }

        public function createTables() {
                $this->setupSchemaVars();
                $this->db->setFlag( DBO_DDLMODE );
                $this->parent->setVar( 'wgDBname', $this->getVar( 'wgDBuser' ) );
                $status = parent::createTables();
                $this->db->clearFlag( DBO_DDLMODE );

                $this->db->query( 'BEGIN fill_wiki_info; END;' );

                return $status;
        }

        public function getSchemaVars() {
                $varNames = array(
                        # These variables are used by maintenance/oracle/user.sql
                        '_OracleDefTS',
                        '_OracleTempTS',
                        'wgDBuser',
                        'wgDBpassword',

                        # These are used by tables.sql
                        'wgDBprefix',
                );
                $vars = array();
                foreach ( $varNames as $name ) {
                        $vars[$name] = $this->getVar( $name );
                }
                return $vars;
        }

        public function getLocalSettings() {
                $prefix = $this->getVar( 'wgDBprefix' );
                return
"# Oracle specific settings
\$wgDBprefix         = \"{$prefix}\";
";
        }

}