3 * DBMS-specific installation helper.
10 * Base class for DBMS-specific installation helper classes.
15 abstract class DatabaseInstaller {
18 * The Installer object.
20 * TODO: naming this parent is confusing, 'installer' would be clearer.
27 * The database connection.
34 * Internal variables for installation.
38 protected $internalDefaults = array();
41 * Array of MW configuration globals this class uses.
45 protected $globalNames = array();
48 * Return the internal name, e.g. 'mysql', or 'sqlite'.
50 public abstract function getName();
53 * @return true if the client library is compiled in.
55 public abstract function isCompiled();
58 * Get HTML for a web form that configures this database. Configuration
59 * at this time should be the minimum needed to connect and test
60 * whether install or upgrade is required.
62 * If this is called, $this->parent can be assumed to be a WebInstaller.
64 public abstract function getConnectForm();
67 * Set variables based on the request array, assuming it was submitted
68 * via the form returned by getConnectForm(). Validate the connection
69 * settings by attempting to connect with them.
71 * If this is called, $this->parent can be assumed to be a WebInstaller.
75 public abstract function submitConnectForm();
78 * Get HTML for a web form that retrieves settings used for installation.
79 * $this->parent can be assumed to be a WebInstaller.
80 * If the DB type has no settings beyond those already configured with
81 * getConnectForm(), this should return false.
83 public function getSettingsForm() {
88 * Set variables based on the request array, assuming it was submitted via
89 * the form return by getSettingsForm().
93 public function submitSettingsForm() {
94 return Status::newGood();
98 * Open a connection to the database using the administrative user/password
99 * currently defined in the session, without any caching. Returns a status
100 * object. On success, the status object will contain a Database object in
105 public abstract function openConnection();
108 * Create the database and return a Status object indicating success or
113 public abstract function setupDatabase();
116 * Connect to the database using the administrative user/password currently
117 * defined in the session. Returns a status object. On success, the status
118 * object will contain a Database object in its value member.
120 * This will return a cached connection if one is available.
124 public function getConnection() {
126 return Status::newGood( $this->db );
129 $status = $this->openConnection();
130 if ( $status->isOK() ) {
131 $this->db = $status->value;
133 $this->db->clearFlag( DBO_TRX );
140 * Create database tables from scratch.
144 public function createTables() {
145 $status = $this->getConnection();
146 if ( !$status->isOK() ) {
149 $this->db->selectDB( $this->getVar( 'wgDBname' ) );
151 if( $this->db->tableExists( 'user' ) ) {
152 $status->warning( 'config-install-tables-exist' );
157 $this->db->setFlag( DBO_DDLMODE ); // For Oracle's handling of schema files
158 $this->db->begin( __METHOD__ );
160 $error = $this->db->sourceFile( $this->db->getSchema() );
161 if( $error !== true ) {
162 $this->db->reportQueryError( $error, 0, '', __METHOD__ );
163 $this->db->rollback( __METHOD__ );
164 $status->fatal( 'config-install-tables-failed', $error );
166 $this->db->commit( __METHOD__ );
168 // Resume normal operations
169 if( $status->isOk() ) {
176 * Create the tables for each extension the user enabled
179 public function createExtensionTables() {
180 $status = $this->getConnection();
181 if ( !$status->isOK() ) {
184 $updater = DatabaseUpdater::newForDB( $this->db );
185 $extensionUpdates = $updater->getNewExtensions();
187 $ourExtensions = array_map( 'strtolower', $this->getVar( '_Extensions' ) );
189 foreach( $ourExtensions as $ext ) {
190 if( isset( $extensionUpdates[$ext] ) ) {
191 $this->db->begin( __METHOD__ );
192 $error = $this->db->sourceFile( $extensionUpdates[$ext] );
193 if( $error !== true ) {
194 $this->db->rollback( __METHOD__ );
195 $status->warning( 'config-install-tables-failed', $error );
197 $this->db->commit( __METHOD__ );
202 // Now run updates to create tables for old extensions
203 $updater->doUpdates( array( 'extensions' ) );
209 * Get the DBMS-specific options for LocalSettings.php generation.
213 public abstract function getLocalSettings();
216 * Override this to provide DBMS-specific schema variables, to be
217 * substituted into tables.sql and other schema files.
219 public function getSchemaVars() {
224 * Set appropriate schema variables in the current database connection.
226 * This should be called after any request data has been imported, but before
227 * any write operations to the database.
229 public function setupSchemaVars() {
230 $status = $this->getConnection();
231 if ( $status->isOK() ) {
232 $status->value->setSchemaVars( $this->getSchemaVars() );
234 throw new MWException( __METHOD__.': unexpected DB connection error' );
239 * Set up LBFactory so that wfGetDB() etc. works.
240 * We set up a special LBFactory instance which returns the current
241 * installer connection.
243 public function enableLB() {
244 $status = $this->getConnection();
245 if ( !$status->isOK() ) {
246 throw new MWException( __METHOD__.': unexpected DB connection error' );
248 LBFactory::setInstance( new LBFactory_Single( array(
249 'connection' => $status->value ) ) );
253 * Perform database upgrades
257 public function doUpgrade() {
258 $this->setupSchemaVars();
262 ob_start( array( $this, 'outputHandler' ) );
264 $up = DatabaseUpdater::newForDB( $this->db );
266 } catch ( MWException $e ) {
267 echo "\nAn error occured:\n";
276 * Allow DB installers a chance to make last-minute changes before installation
277 * occurs. This happens before setupDatabase() or createTables() is called, but
278 * long after the constructor. Helpful for things like modifying setup steps :)
280 public function preInstall() {
285 * Allow DB installers a chance to make checks before upgrade.
287 public function preUpgrade() {
292 * Get an array of MW configuration globals that will be configured by this class.
294 public function getGlobalNames() {
295 return $this->globalNames;
299 * Construct and initialise parent.
300 * This is typically only called from Installer::getDBInstaller()
302 public function __construct( $parent ) {
303 $this->parent = $parent;
307 * Convenience function.
308 * Check if a named extension is present.
312 protected static function checkExtension( $name ) {
313 wfSuppressWarnings();
314 $compiled = wfDl( $name );
320 * Get the internationalised name for this DBMS.
322 public function getReadableName() {
323 return wfMsg( 'config-type-' . $this->getName() );
327 * Get a name=>value map of MW configuration globals that overrides.
328 * DefaultSettings.php
330 public function getGlobalDefaults() {
335 * Get a name=>value map of internal variables used during installation.
337 public function getInternalDefaults() {
338 return $this->internalDefaults;
342 * Get a variable, taking local defaults into account.
344 public function getVar( $var, $default = null ) {
345 $defaults = $this->getGlobalDefaults();
346 $internal = $this->getInternalDefaults();
347 if ( isset( $defaults[$var] ) ) {
348 $default = $defaults[$var];
349 } elseif ( isset( $internal[$var] ) ) {
350 $default = $internal[$var];
352 return $this->parent->getVar( $var, $default );
356 * Convenience alias for $this->parent->setVar()
358 public function setVar( $name, $value ) {
359 $this->parent->setVar( $name, $value );
363 * Get a labelled text box to configure a local variable.
365 public function getTextBox( $var, $label, $attribs = array(), $helpData = "" ) {
366 $name = $this->getName() . '_' . $var;
367 $value = $this->getVar( $var );
368 if ( !isset( $attribs ) ) {
371 return $this->parent->getTextBox( array(
374 'attribs' => $attribs,
375 'controlName' => $name,
382 * Get a labelled password box to configure a local variable.
383 * Implements password hiding.
385 public function getPasswordBox( $var, $label, $attribs = array(), $helpData = "" ) {
386 $name = $this->getName() . '_' . $var;
387 $value = $this->getVar( $var );
388 if ( !isset( $attribs ) ) {
391 return $this->parent->getPasswordBox( array(
394 'attribs' => $attribs,
395 'controlName' => $name,
402 * Get a labelled checkbox to configure a local boolean variable.
404 public function getCheckBox( $var, $label, $attribs = array(), $helpData = "" ) {
405 $name = $this->getName() . '_' . $var;
406 $value = $this->getVar( $var );
407 return $this->parent->getCheckBox( array(
410 'attribs' => $attribs,
411 'controlName' => $name,
418 * Get a set of labelled radio buttons.
420 * @param $params Array:
422 * var: The variable to be configured (required)
423 * label: The message name for the label (required)
424 * itemLabelPrefix: The message name prefix for the item labels (required)
425 * values: List of allowed values (required)
426 * itemAttribs Array of attribute arrays, outer key is the value name (optional)
429 public function getRadioSet( $params ) {
430 $params['controlName'] = $this->getName() . '_' . $params['var'];
431 $params['value'] = $this->getVar( $params['var'] );
432 return $this->parent->getRadioSet( $params );
436 * Convenience function to set variables based on form data.
437 * Assumes that variables containing "password" in the name are (potentially
439 * @param $varNames Array
441 public function setVarsFromRequest( $varNames ) {
442 return $this->parent->setVarsFromRequest( $varNames, $this->getName() . '_' );
446 * Determine whether an existing installation of MediaWiki is present in
447 * the configured administrative connection. Returns true if there is
448 * such a wiki, false if the database doesn't exist.
450 * Traditionally, this is done by testing for the existence of either
451 * the revision table or the cur table.
455 public function needsUpgrade() {
456 $status = $this->getConnection();
457 if ( !$status->isOK() ) {
461 if ( !$this->db->selectDB( $this->getVar( 'wgDBname' ) ) ) {
464 return $this->db->tableExists( 'cur' ) || $this->db->tableExists( 'revision' );
468 * Get a standard install-user fieldset.
472 public function getInstallUserBox() {
474 Html::openElement( 'fieldset' ) .
475 Html::element( 'legend', array(), wfMsg( 'config-db-install-account' ) ) .
476 $this->getTextBox( '_InstallUser', 'config-db-username', array(), $this->parent->getHelpBox( 'config-db-install-username' ) ) .
477 $this->getPasswordBox( '_InstallPassword', 'config-db-password', array(), $this->parent->getHelpBox( 'config-db-install-password' ) ) .
478 Html::closeElement( 'fieldset' );
482 * Submit a standard install user fieldset.
484 public function submitInstallUserBox() {
485 $this->setVarsFromRequest( array( '_InstallUser', '_InstallPassword' ) );
486 return Status::newGood();
490 * Get a standard web-user fieldset
491 * @param $noCreateMsg String: Message to display instead of the creation checkbox.
492 * Set this to false to show a creation checkbox.
496 public function getWebUserBox( $noCreateMsg = false ) {
497 $wrapperStyle = $this->getVar( '_SameAccount' ) ? 'display: none' : '';
498 $s = Html::openElement( 'fieldset' ) .
499 Html::element( 'legend', array(), wfMsg( 'config-db-web-account' ) ) .
501 '_SameAccount', 'config-db-web-account-same',
502 array( 'class' => 'hideShowRadio', 'rel' => 'dbOtherAccount' )
504 Html::openElement( 'div', array( 'id' => 'dbOtherAccount', 'style' => $wrapperStyle ) ) .
505 $this->getTextBox( 'wgDBuser', 'config-db-username' ) .
506 $this->getPasswordBox( 'wgDBpassword', 'config-db-password' ) .
507 $this->parent->getHelpBox( 'config-db-web-help' );
508 if ( $noCreateMsg ) {
509 $s .= $this->parent->getWarningBox( wfMsgNoTrans( $noCreateMsg ) );
511 $s .= $this->getCheckBox( '_CreateDBAccount', 'config-db-web-create' );
513 $s .= Html::closeElement( 'div' ) . Html::closeElement( 'fieldset' );
518 * Submit the form from getWebUserBox().
522 public function submitWebUserBox() {
523 $this->setVarsFromRequest(
524 array( 'wgDBuser', 'wgDBpassword', '_SameAccount', '_CreateDBAccount' )
527 if ( $this->getVar( '_SameAccount' ) ) {
528 $this->setVar( 'wgDBuser', $this->getVar( '_InstallUser' ) );
529 $this->setVar( 'wgDBpassword', $this->getVar( '_InstallPassword' ) );
532 if( $this->getVar( '_CreateDBAccount' ) && strval( $this->getVar( 'wgDBpassword' ) ) == '' ) {
533 return Status::newFatal( 'config-db-password-empty', $this->getVar( 'wgDBuser' ) );
536 return Status::newGood();
540 * Common function for databases that don't understand the MySQLish syntax of interwiki.sql.
544 public function populateInterwikiTable() {
545 $status = $this->getConnection();
546 if ( !$status->isOK() ) {
549 $this->db->selectDB( $this->getVar( 'wgDBname' ) );
551 if( $this->db->selectRow( 'interwiki', '*', array(), __METHOD__ ) ) {
552 $status->warning( 'config-install-interwiki-exists' );
556 wfSuppressWarnings();
557 $rows = file( "$IP/maintenance/interwiki.list",
558 FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES );
560 $interwikis = array();
562 return Status::newFatal( 'config-install-interwiki-list' );
564 foreach( $rows as $row ) {
565 $row = preg_replace( '/^\s*([^#]*?)\s*(#.*)?$/', '\\1', $row ); // strip comments - whee
566 if ( $row == "" ) continue;
568 $interwikis[] = array_combine(
569 array( 'iw_prefix', 'iw_url', 'iw_local', 'iw_api', 'iw_wikiid' ),
573 $this->db->insert( 'interwiki', $interwikis, __METHOD__ );
574 return Status::newGood();
577 public function outputHandler( $string ) {
578 return htmlspecialchars( $string );