MediaWiki REL1_33
PostgresInstaller.php
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1<?php
27
35
36 protected $globalNames = [
37 'wgDBserver',
38 'wgDBport',
39 'wgDBname',
40 'wgDBuser',
41 'wgDBpassword',
42 'wgDBmwschema',
43 ];
44
45 protected $internalDefaults = [
46 '_InstallUser' => 'postgres',
47 ];
48
49 public static $minimumVersion = '9.2';
50 protected static $notMiniumumVerisonMessage = 'config-postgres-old';
52
53 protected $pgConns = [];
54
55 function getName() {
56 return 'postgres';
57 }
58
59 public function isCompiled() {
60 return self::checkExtension( 'pgsql' );
61 }
62
63 function getConnectForm() {
64 return $this->getTextBox(
65 'wgDBserver',
66 'config-db-host',
67 [],
68 $this->parent->getHelpBox( 'config-db-host-help' )
69 ) .
70 $this->getTextBox( 'wgDBport', 'config-db-port' ) .
71 Html::openElement( 'fieldset' ) .
72 Html::element( 'legend', [], wfMessage( 'config-db-wiki-settings' )->text() ) .
73 $this->getTextBox(
74 'wgDBname',
75 'config-db-name',
76 [],
77 $this->parent->getHelpBox( 'config-db-name-help' )
78 ) .
79 $this->getTextBox(
80 'wgDBmwschema',
81 'config-db-schema',
82 [],
83 $this->parent->getHelpBox( 'config-db-schema-help' )
84 ) .
85 Html::closeElement( 'fieldset' ) .
86 $this->getInstallUserBox();
87 }
88
89 function submitConnectForm() {
90 // Get variables from the request
91 $newValues = $this->setVarsFromRequest( [
92 'wgDBserver',
93 'wgDBport',
94 'wgDBname',
95 'wgDBmwschema'
96 ] );
97
98 // Validate them
99 $status = Status::newGood();
100 if ( !strlen( $newValues['wgDBname'] ) ) {
101 $status->fatal( 'config-missing-db-name' );
102 } elseif ( !preg_match( '/^[a-zA-Z0-9_]+$/', $newValues['wgDBname'] ) ) {
103 $status->fatal( 'config-invalid-db-name', $newValues['wgDBname'] );
104 }
105 if ( !preg_match( '/^[a-zA-Z0-9_]*$/', $newValues['wgDBmwschema'] ) ) {
106 $status->fatal( 'config-invalid-schema', $newValues['wgDBmwschema'] );
107 }
108
109 // Submit user box
110 if ( $status->isOK() ) {
111 $status->merge( $this->submitInstallUserBox() );
112 }
113 if ( !$status->isOK() ) {
114 return $status;
115 }
116
117 $status = $this->getPgConnection( 'create-db' );
118 if ( !$status->isOK() ) {
119 return $status;
120 }
124 $conn = $status->value;
125
126 // Check version
127 $version = $conn->getServerVersion();
128 $status = static::meetsMinimumRequirement( $version );
129 if ( !$status->isOK() ) {
130 return $status;
131 }
132
133 $this->setVar( 'wgDBuser', $this->getVar( '_InstallUser' ) );
134 $this->setVar( 'wgDBpassword', $this->getVar( '_InstallPassword' ) );
135
136 return Status::newGood();
137 }
138
139 public function getConnection() {
140 $status = $this->getPgConnection( 'create-tables' );
141 if ( $status->isOK() ) {
142 $this->db = $status->value;
143 }
144
145 return $status;
146 }
147
148 public function openConnection() {
149 return $this->openPgConnection( 'create-tables' );
150 }
151
160 protected function openConnectionWithParams( $user, $password, $dbName, $schema ) {
161 $status = Status::newGood();
162 try {
163 $db = Database::factory( 'postgres', [
164 'host' => $this->getVar( 'wgDBserver' ),
165 'port' => $this->getVar( 'wgDBport' ),
166 'user' => $user,
167 'password' => $password,
168 'dbname' => $dbName,
169 'schema' => $schema,
170 'keywordTableMap' => [ 'user' => 'mwuser', 'text' => 'pagecontent' ],
171 ] );
172 $status->value = $db;
173 } catch ( DBConnectionError $e ) {
174 $status->fatal( 'config-connection-error', $e->getMessage() );
175 }
176
177 return $status;
178 }
179
185 protected function getPgConnection( $type ) {
186 if ( isset( $this->pgConns[$type] ) ) {
187 return Status::newGood( $this->pgConns[$type] );
188 }
189 $status = $this->openPgConnection( $type );
190
191 if ( $status->isOK() ) {
195 $conn = $status->value;
196 $conn->clearFlag( DBO_TRX );
197 $conn->commit( __METHOD__ );
198 $this->pgConns[$type] = $conn;
199 }
200
201 return $status;
202 }
203
229 protected function openPgConnection( $type ) {
230 switch ( $type ) {
231 case 'create-db':
232 return $this->openConnectionToAnyDB(
233 $this->getVar( '_InstallUser' ),
234 $this->getVar( '_InstallPassword' ) );
235 case 'create-schema':
236 return $this->openConnectionWithParams(
237 $this->getVar( '_InstallUser' ),
238 $this->getVar( '_InstallPassword' ),
239 $this->getVar( 'wgDBname' ),
240 $this->getVar( 'wgDBmwschema' ) );
241 case 'create-tables':
242 $status = $this->openPgConnection( 'create-schema' );
243 if ( $status->isOK() ) {
247 $conn = $status->value;
248 $safeRole = $conn->addIdentifierQuotes( $this->getVar( 'wgDBuser' ) );
249 $conn->query( "SET ROLE $safeRole" );
250 }
251
252 return $status;
253 default:
254 throw new MWException( "Invalid special connection type: \"$type\"" );
255 }
256 }
257
258 public function openConnectionToAnyDB( $user, $password ) {
259 $dbs = [
260 'template1',
261 'postgres',
262 ];
263 if ( !in_array( $this->getVar( 'wgDBname' ), $dbs ) ) {
264 array_unshift( $dbs, $this->getVar( 'wgDBname' ) );
265 }
266 $conn = false;
267 $status = Status::newGood();
268 foreach ( $dbs as $db ) {
269 try {
270 $p = [
271 'host' => $this->getVar( 'wgDBserver' ),
272 'user' => $user,
273 'password' => $password,
274 'dbname' => $db
275 ];
276 $conn = Database::factory( 'postgres', $p );
277 } catch ( DBConnectionError $error ) {
278 $conn = false;
279 $status->fatal( 'config-pg-test-error', $db,
280 $error->getMessage() );
281 }
282 if ( $conn !== false ) {
283 break;
284 }
285 }
286 if ( $conn !== false ) {
287 return Status::newGood( $conn );
288 } else {
289 return $status;
290 }
291 }
292
293 protected function getInstallUserPermissions() {
294 $status = $this->getPgConnection( 'create-db' );
295 if ( !$status->isOK() ) {
296 return false;
297 }
301 $conn = $status->value;
302 $superuser = $this->getVar( '_InstallUser' );
303
304 $row = $conn->selectRow( '"pg_catalog"."pg_roles"', '*',
305 [ 'rolname' => $superuser ], __METHOD__ );
306
307 return $row;
308 }
309
310 protected function canCreateAccounts() {
311 $perms = $this->getInstallUserPermissions();
312 if ( !$perms ) {
313 return false;
314 }
315
316 return $perms->rolsuper === 't' || $perms->rolcreaterole === 't';
317 }
318
319 protected function isSuperUser() {
320 $perms = $this->getInstallUserPermissions();
321 if ( !$perms ) {
322 return false;
323 }
324
325 return $perms->rolsuper === 't';
326 }
327
328 public function getSettingsForm() {
329 if ( $this->canCreateAccounts() ) {
330 $noCreateMsg = false;
331 } else {
332 $noCreateMsg = 'config-db-web-no-create-privs';
333 }
334 $s = $this->getWebUserBox( $noCreateMsg );
335
336 return $s;
337 }
338
339 public function submitSettingsForm() {
340 $status = $this->submitWebUserBox();
341 if ( !$status->isOK() ) {
342 return $status;
343 }
344
345 $same = $this->getVar( 'wgDBuser' ) === $this->getVar( '_InstallUser' );
346
347 if ( $same ) {
348 $exists = true;
349 } else {
350 // Check if the web user exists
351 // Connect to the database with the install user
352 $status = $this->getPgConnection( 'create-db' );
353 if ( !$status->isOK() ) {
354 return $status;
355 }
356 $exists = $status->value->roleExists( $this->getVar( 'wgDBuser' ) );
357 }
358
359 // Validate the create checkbox
360 if ( $this->canCreateAccounts() && !$same && !$exists ) {
361 $create = $this->getVar( '_CreateDBAccount' );
362 } else {
363 $this->setVar( '_CreateDBAccount', false );
364 $create = false;
365 }
366
367 if ( !$create && !$exists ) {
368 if ( $this->canCreateAccounts() ) {
369 $msg = 'config-install-user-missing-create';
370 } else {
371 $msg = 'config-install-user-missing';
372 }
373
374 return Status::newFatal( $msg, $this->getVar( 'wgDBuser' ) );
375 }
376
377 if ( !$exists ) {
378 // No more checks to do
379 return Status::newGood();
380 }
381
382 // Existing web account. Test the connection.
384 $this->getVar( 'wgDBuser' ),
385 $this->getVar( 'wgDBpassword' ) );
386 if ( !$status->isOK() ) {
387 return $status;
388 }
389
390 // The web user is conventionally the table owner in PostgreSQL
391 // installations. Make sure the install user is able to create
392 // objects on behalf of the web user.
393 if ( $same || $this->canCreateObjectsForWebUser() ) {
394 return Status::newGood();
395 } else {
396 return Status::newFatal( 'config-pg-not-in-role' );
397 }
398 }
399
405 protected function canCreateObjectsForWebUser() {
406 if ( $this->isSuperUser() ) {
407 return true;
408 }
409
410 $status = $this->getPgConnection( 'create-db' );
411 if ( !$status->isOK() ) {
412 return false;
413 }
414 $conn = $status->value;
415 $installerId = $conn->selectField( '"pg_catalog"."pg_roles"', 'oid',
416 [ 'rolname' => $this->getVar( '_InstallUser' ) ], __METHOD__ );
417 $webId = $conn->selectField( '"pg_catalog"."pg_roles"', 'oid',
418 [ 'rolname' => $this->getVar( 'wgDBuser' ) ], __METHOD__ );
419
420 return $this->isRoleMember( $conn, $installerId, $webId, $this->maxRoleSearchDepth );
421 }
422
431 protected function isRoleMember( $conn, $targetMember, $group, $maxDepth ) {
432 if ( $targetMember === $group ) {
433 // A role is always a member of itself
434 return true;
435 }
436 // Get all members of the given group
437 $res = $conn->select( '"pg_catalog"."pg_auth_members"', [ 'member' ],
438 [ 'roleid' => $group ], __METHOD__ );
439 foreach ( $res as $row ) {
440 if ( $row->member == $targetMember ) {
441 // Found target member
442 return true;
443 }
444 // Recursively search each member of the group to see if the target
445 // is a member of it, up to the given maximum depth.
446 if ( $maxDepth > 0 &&
447 $this->isRoleMember( $conn, $targetMember, $row->member, $maxDepth - 1 )
448 ) {
449 // Found member of member
450 return true;
451 }
452 }
453
454 return false;
455 }
456
457 public function preInstall() {
458 $createDbAccount = [
459 'name' => 'user',
460 'callback' => [ $this, 'setupUser' ],
461 ];
462 $commitCB = [
463 'name' => 'pg-commit',
464 'callback' => [ $this, 'commitChanges' ],
465 ];
466 $plpgCB = [
467 'name' => 'pg-plpgsql',
468 'callback' => [ $this, 'setupPLpgSQL' ],
469 ];
470 $schemaCB = [
471 'name' => 'schema',
472 'callback' => [ $this, 'setupSchema' ]
473 ];
474
475 if ( $this->getVar( '_CreateDBAccount' ) ) {
476 $this->parent->addInstallStep( $createDbAccount, 'database' );
477 }
478 $this->parent->addInstallStep( $commitCB, 'interwiki' );
479 $this->parent->addInstallStep( $plpgCB, 'database' );
480 $this->parent->addInstallStep( $schemaCB, 'database' );
481 }
482
483 function setupDatabase() {
484 $status = $this->getPgConnection( 'create-db' );
485 if ( !$status->isOK() ) {
486 return $status;
487 }
488 $conn = $status->value;
489
490 $dbName = $this->getVar( 'wgDBname' );
491
492 $exists = $conn->selectField( '"pg_catalog"."pg_database"', '1',
493 [ 'datname' => $dbName ], __METHOD__ );
494 if ( !$exists ) {
495 $safedb = $conn->addIdentifierQuotes( $dbName );
496 $conn->query( "CREATE DATABASE $safedb", __METHOD__ );
497 }
498
499 return Status::newGood();
500 }
501
502 function setupSchema() {
503 // Get a connection to the target database
504 $status = $this->getPgConnection( 'create-schema' );
505 if ( !$status->isOK() ) {
506 return $status;
507 }
508 $conn = $status->value;
509
510 // Create the schema if necessary
511 $schema = $this->getVar( 'wgDBmwschema' );
512 $safeschema = $conn->addIdentifierQuotes( $schema );
513 $safeuser = $conn->addIdentifierQuotes( $this->getVar( 'wgDBuser' ) );
514 if ( !$conn->schemaExists( $schema ) ) {
515 try {
516 $conn->query( "CREATE SCHEMA $safeschema AUTHORIZATION $safeuser" );
517 } catch ( DBQueryError $e ) {
518 return Status::newFatal( 'config-install-pg-schema-failed',
519 $this->getVar( '_InstallUser' ), $schema );
520 }
521 }
522
523 // Select the new schema in the current connection
524 $conn->determineCoreSchema( $schema );
525
526 return Status::newGood();
527 }
528
529 function commitChanges() {
530 $this->db->commit( __METHOD__ );
531
532 return Status::newGood();
533 }
534
535 function setupUser() {
536 if ( !$this->getVar( '_CreateDBAccount' ) ) {
537 return Status::newGood();
538 }
539
540 $status = $this->getPgConnection( 'create-db' );
541 if ( !$status->isOK() ) {
542 return $status;
543 }
544 $conn = $status->value;
545
546 $safeuser = $conn->addIdentifierQuotes( $this->getVar( 'wgDBuser' ) );
547 $safepass = $conn->addQuotes( $this->getVar( 'wgDBpassword' ) );
548
549 // Check if the user already exists
550 $userExists = $conn->roleExists( $this->getVar( 'wgDBuser' ) );
551 if ( !$userExists ) {
552 // Create the user
553 try {
554 $sql = "CREATE ROLE $safeuser NOCREATEDB LOGIN PASSWORD $safepass";
555
556 // If the install user is not a superuser, we need to make the install
557 // user a member of the new user's group, so that the install user will
558 // be able to create a schema and other objects on behalf of the new user.
559 if ( !$this->isSuperUser() ) {
560 $sql .= ' ROLE' . $conn->addIdentifierQuotes( $this->getVar( '_InstallUser' ) );
561 }
562
563 $conn->query( $sql, __METHOD__ );
564 } catch ( DBQueryError $e ) {
565 return Status::newFatal( 'config-install-user-create-failed',
566 $this->getVar( 'wgDBuser' ), $e->getMessage() );
567 }
568 }
569
570 return Status::newGood();
571 }
572
573 function getLocalSettings() {
574 $port = $this->getVar( 'wgDBport' );
575 $schema = $this->getVar( 'wgDBmwschema' );
576
577 return "# Postgres specific settings
578\$wgDBport = \"{$port}\";
579\$wgDBmwschema = \"{$schema}\";";
580 }
581
582 public function preUpgrade() {
583 global $wgDBuser, $wgDBpassword;
584
585 # Normal user and password are selected after this step, so for now
586 # just copy these two
587 $wgDBuser = $this->getVar( '_InstallUser' );
588 $wgDBpassword = $this->getVar( '_InstallPassword' );
589 }
590
591 public function createTables() {
592 $schema = $this->getVar( 'wgDBmwschema' );
593
594 $status = $this->getConnection();
595 if ( !$status->isOK() ) {
596 return $status;
597 }
598
600 $conn = $status->value;
601
602 if ( $conn->tableExists( 'archive' ) ) {
603 $status->warning( 'config-install-tables-exist' );
604 $this->enableLB();
605
606 return $status;
607 }
608
609 $conn->begin( __METHOD__ );
610
611 if ( !$conn->schemaExists( $schema ) ) {
612 $status->fatal( 'config-install-pg-schema-not-exist' );
613
614 return $status;
615 }
616 $error = $conn->sourceFile( $this->getSchemaPath( $conn ) );
617 if ( $error !== true ) {
618 $conn->reportQueryError( $error, 0, '', __METHOD__ );
619 $conn->rollback( __METHOD__ );
620 $status->fatal( 'config-install-tables-failed', $error );
621 } else {
622 $conn->commit( __METHOD__ );
623 }
624 // Resume normal operations
625 if ( $status->isOK() ) {
626 $this->enableLB();
627 }
628
629 return $status;
630 }
631
632 public function getGlobalDefaults() {
633 // The default $wgDBmwschema is null, which breaks Postgres and other DBMSes that require
634 // the use of a schema, so we need to set it here
635 return array_merge( parent::getGlobalDefaults(), [
636 'wgDBmwschema' => 'mediawiki',
637 ] );
638 }
639
640 public function setupPLpgSQL() {
641 // Connect as the install user, since it owns the database and so is
642 // the user that needs to run "CREATE LANGUAGE"
643 $status = $this->getPgConnection( 'create-schema' );
644 if ( !$status->isOK() ) {
645 return $status;
646 }
650 $conn = $status->value;
651
652 $exists = $conn->selectField( '"pg_catalog"."pg_language"', 1,
653 [ 'lanname' => 'plpgsql' ], __METHOD__ );
654 if ( $exists ) {
655 // Already exists, nothing to do
656 return Status::newGood();
657 }
658
659 // plpgsql is not installed, but if we have a pg_pltemplate table, we
660 // should be able to create it
661 $exists = $conn->selectField(
662 [ '"pg_catalog"."pg_class"', '"pg_catalog"."pg_namespace"' ],
663 1,
664 [
665 'pg_namespace.oid=relnamespace',
666 'nspname' => 'pg_catalog',
667 'relname' => 'pg_pltemplate',
668 ],
669 __METHOD__ );
670 if ( $exists ) {
671 try {
672 $conn->query( 'CREATE LANGUAGE plpgsql' );
673 } catch ( DBQueryError $e ) {
674 return Status::newFatal( 'config-pg-no-plpgsql', $this->getVar( 'wgDBname' ) );
675 }
676 } else {
677 return Status::newFatal( 'config-pg-no-plpgsql', $this->getVar( 'wgDBname' ) );
678 }
679
680 return Status::newGood();
681 }
682}
Apache License January AND DISTRIBUTION Definitions License shall mean the terms and conditions for use
This list may contain false positives That usually means there is additional text with links below the first Each row contains links to the first and second as well as the first line of the second redirect text
$wgDBuser
Database username.
$wgDBpassword
Database user's password.
Base class for DBMS-specific installation helper classes.
getWebUserBox( $noCreateMsg=false)
Get a standard web-user fieldset.
submitWebUserBox()
Submit the form from getWebUserBox().
static checkExtension( $name)
Convenience function.
enableLB()
Set up LBFactory so that wfGetDB() etc.
Database $db
The database connection.
setVarsFromRequest( $varNames)
Convenience function to set variables based on form data.
getSchemaPath( $db)
Return a path to the DBMS-specific schema file, otherwise default to tables.sql.
getVar( $var, $default=null)
Get a variable, taking local defaults into account.
getTextBox( $var, $label, $attribs=[], $helpData="")
Get a labelled text box to configure a local variable.
setVar( $name, $value)
Convenience alias for $this->parent->setVar()
submitInstallUserBox()
Submit a standard install user fieldset.
getInstallUserBox()
Get a standard install-user fieldset.
MediaWiki exception.
Class for setting up the MediaWiki database using Postgres.
getConnection()
Connect to the database using the administrative user/password currently defined in the session.
getPgConnection( $type)
Get a special type of connection.
openConnectionToAnyDB( $user, $password)
getName()
Return the internal name, e.g.
openConnectionWithParams( $user, $password, $dbName, $schema)
Open a PG connection with given parameters.
preUpgrade()
Allow DB installers a chance to make checks before upgrade.
setupDatabase()
Create the database and return a Status object indicating success or failure.
getGlobalDefaults()
Get a name=>value map of MW configuration globals for the default values.
createTables()
Create database tables from scratch.
getConnectForm()
Get HTML for a web form that configures this database.
submitSettingsForm()
Set variables based on the request array, assuming it was submitted via the form return by getSetting...
preInstall()
Allow DB installers a chance to make last-minute changes before installation occurs.
openConnection()
Open a connection to the database using the administrative user/password currently defined in the ses...
isRoleMember( $conn, $targetMember, $group, $maxDepth)
Recursive helper for canCreateObjectsForWebUser().
canCreateObjectsForWebUser()
Returns true if the install user is able to create objects owned by the web user, false otherwise.
getSettingsForm()
Get HTML for a web form that retrieves settings used for installation.
getLocalSettings()
Get the DBMS-specific options for LocalSettings.php generation.
openPgConnection( $type)
Get a connection of a specific PostgreSQL-specific type.
submitConnectForm()
Set variables based on the request array, assuming it was submitted via the form returned by getConne...
Relational database abstraction object.
Definition Database.php:49
$res
Definition database.txt:21
This document is intended to provide useful advice for parties seeking to redistribute MediaWiki to end users It s targeted particularly at maintainers for Linux since it s been observed that distribution packages of MediaWiki often break We ve consistently had to recommend that users seeking support use official tarballs instead of their distribution s and this often solves whatever problem the user is having It would be nice if this could such as
Status::newGood()` to allow deletion, and then `return false` from the hook function. Ensure you consume the 'ChangeTagAfterDelete' hook to carry out custom deletion actions. $tag:name of the tag $user:user initiating the action & $status:Status object. See above. 'ChangeTagsListActive':Allows you to nominate which of the tags your extension uses are in active use. & $tags:list of all active tags. Append to this array. 'ChangeTagsAfterUpdateTags':Called after tags have been updated with the ChangeTags::updateTags function. Params:$addedTags:tags effectively added in the update $removedTags:tags effectively removed in the update $prevTags:tags that were present prior to the update $rc_id:recentchanges table id $rev_id:revision table id $log_id:logging table id $params:tag params $rc:RecentChange being tagged when the tagging accompanies the action, or null $user:User who performed the tagging when the tagging is subsequent to the action, or null 'ChangeTagsAllowedAdd':Called when checking if a user can add tags to a change. & $allowedTags:List of all the tags the user is allowed to add. Any tags the user wants to add( $addTags) that are not in this array will cause it to fail. You may add or remove tags to this array as required. $addTags:List of tags user intends to add. $user:User who is adding the tags. 'ChangeUserGroups':Called before user groups are changed. $performer:The User who will perform the change $user:The User whose groups will be changed & $add:The groups that will be added & $remove:The groups that will be removed 'Collation::factory':Called if $wgCategoryCollation is an unknown collation. $collationName:Name of the collation in question & $collationObject:Null. Replace with a subclass of the Collation class that implements the collation given in $collationName. 'ConfirmEmailComplete':Called after a user 's email has been confirmed successfully. $user:user(object) whose email is being confirmed 'ContentAlterParserOutput':Modify parser output for a given content object. Called by Content::getParserOutput after parsing has finished. Can be used for changes that depend on the result of the parsing but have to be done before LinksUpdate is called(such as adding tracking categories based on the rendered HTML). $content:The Content to render $title:Title of the page, as context $parserOutput:ParserOutput to manipulate 'ContentGetParserOutput':Customize parser output for a given content object, called by AbstractContent::getParserOutput. May be used to override the normal model-specific rendering of page content. $content:The Content to render $title:Title of the page, as context $revId:The revision ID, as context $options:ParserOptions for rendering. To avoid confusing the parser cache, the output can only depend on parameters provided to this hook function, not on global state. $generateHtml:boolean, indicating whether full HTML should be generated. If false, generation of HTML may be skipped, but other information should still be present in the ParserOutput object. & $output:ParserOutput, to manipulate or replace 'ContentHandlerDefaultModelFor':Called when the default content model is determined for a given title. May be used to assign a different model for that title. $title:the Title in question & $model:the model name. Use with CONTENT_MODEL_XXX constants. 'ContentHandlerForModelID':Called when a ContentHandler is requested for a given content model name, but no entry for that model exists in $wgContentHandlers. Note:if your extension implements additional models via this hook, please use GetContentModels hook to make them known to core. $modeName:the requested content model name & $handler:set this to a ContentHandler object, if desired. 'ContentModelCanBeUsedOn':Called to determine whether that content model can be used on a given page. This is especially useful to prevent some content models to be used in some special location. $contentModel:ID of the content model in question $title:the Title in question. & $ok:Output parameter, whether it is OK to use $contentModel on $title. Handler functions that modify $ok should generally return false to prevent further hooks from further modifying $ok. 'ContribsPager::getQueryInfo':Before the contributions query is about to run & $pager:Pager object for contributions & $queryInfo:The query for the contribs Pager 'ContribsPager::reallyDoQuery':Called before really executing the query for My Contributions & $data:an array of results of all contribs queries $pager:The ContribsPager object hooked into $offset:Index offset, inclusive $limit:Exact query limit $descending:Query direction, false for ascending, true for descending 'ContributionsLineEnding':Called before a contributions HTML line is finished $page:SpecialPage object for contributions & $ret:the HTML line $row:the DB row for this line & $classes:the classes to add to the surrounding< li > & $attribs:associative array of other HTML attributes for the< li > element. Currently only data attributes reserved to MediaWiki are allowed(see Sanitizer::isReservedDataAttribute). 'ContributionsToolLinks':Change tool links above Special:Contributions $id:User identifier $title:User page title & $tools:Array of tool links $specialPage:SpecialPage instance for context and services. Can be either SpecialContributions or DeletedContributionsPage. Extensions should type hint against a generic SpecialPage though. 'ConvertContent':Called by AbstractContent::convert when a conversion to another content model is requested. Handler functions that modify $result should generally return false to disable further attempts at conversion. $content:The Content object to be converted. $toModel:The ID of the content model to convert to. $lossy:boolean indicating whether lossy conversion is allowed. & $result:Output parameter, in case the handler function wants to provide a converted Content object. Note that $result->getContentModel() must return $toModel. 'ContentSecurityPolicyDefaultSource':Modify the allowed CSP load sources. This affects all directives except for the script directive. If you want to add a script source, see ContentSecurityPolicyScriptSource hook. & $defaultSrc:Array of Content-Security-Policy allowed sources $policyConfig:Current configuration for the Content-Security-Policy header $mode:ContentSecurityPolicy::REPORT_ONLY_MODE or ContentSecurityPolicy::FULL_MODE depending on type of header 'ContentSecurityPolicyDirectives':Modify the content security policy directives. Use this only if ContentSecurityPolicyDefaultSource and ContentSecurityPolicyScriptSource do not meet your needs. & $directives:Array of CSP directives $policyConfig:Current configuration for the CSP header $mode:ContentSecurityPolicy::REPORT_ONLY_MODE or ContentSecurityPolicy::FULL_MODE depending on type of header 'ContentSecurityPolicyScriptSource':Modify the allowed CSP script sources. Note that you also have to use ContentSecurityPolicyDefaultSource if you want non-script sources to be loaded from whatever you add. & $scriptSrc:Array of CSP directives $policyConfig:Current configuration for the CSP header $mode:ContentSecurityPolicy::REPORT_ONLY_MODE or ContentSecurityPolicy::FULL_MODE depending on type of header 'CustomEditor':When invoking the page editor Return true to allow the normal editor to be used, or false if implementing a custom editor, e.g. for a special namespace, etc. $article:Article being edited $user:User performing the edit 'DatabaseOraclePostInit':Called after initialising an Oracle database $db:the DatabaseOracle object 'DeletedContribsPager::reallyDoQuery':Called before really executing the query for Special:DeletedContributions Similar to ContribsPager::reallyDoQuery & $data:an array of results of all contribs queries $pager:The DeletedContribsPager object hooked into $offset:Index offset, inclusive $limit:Exact query limit $descending:Query direction, false for ascending, true for descending 'DeletedContributionsLineEnding':Called before a DeletedContributions HTML line is finished. Similar to ContributionsLineEnding $page:SpecialPage object for DeletedContributions & $ret:the HTML line $row:the DB row for this line & $classes:the classes to add to the surrounding< li > & $attribs:associative array of other HTML attributes for the< li > element. Currently only data attributes reserved to MediaWiki are allowed(see Sanitizer::isReservedDataAttribute). 'DeleteUnknownPreferences':Called by the cleanupPreferences.php maintenance script to build a WHERE clause with which to delete preferences that are not known about. This hook is used by extensions that have dynamically-named preferences that should not be deleted in the usual cleanup process. For example, the Gadgets extension creates preferences prefixed with 'gadget-', and so anything with that prefix is excluded from the deletion. &where:An array that will be passed as the $cond parameter to IDatabase::select() to determine what will be deleted from the user_properties table. $db:The IDatabase object, useful for accessing $db->buildLike() etc. 'DifferenceEngineAfterLoadNewText':called in DifferenceEngine::loadNewText() after the new revision 's content has been loaded into the class member variable $differenceEngine->mNewContent but before returning true from this function. $differenceEngine:DifferenceEngine object 'DifferenceEngineLoadTextAfterNewContentIsLoaded':called in DifferenceEngine::loadText() after the new revision 's content has been loaded into the class member variable $differenceEngine->mNewContent but before checking if the variable 's value is null. This hook can be used to inject content into said class member variable. $differenceEngine:DifferenceEngine object 'DifferenceEngineMarkPatrolledLink':Allows extensions to change the "mark as patrolled" link which is shown both on the diff header as well as on the bottom of a page, usually wrapped in a span element which has class="patrollink". $differenceEngine:DifferenceEngine object & $markAsPatrolledLink:The "mark as patrolled" link HTML(string) $rcid:Recent change ID(rc_id) for this change(int) 'DifferenceEngineMarkPatrolledRCID':Allows extensions to possibly change the rcid parameter. For example the rcid might be set to zero due to the user being the same as the performer of the change but an extension might still want to show it under certain conditions. & $rcid:rc_id(int) of the change or 0 $differenceEngine:DifferenceEngine object $change:RecentChange object $user:User object representing the current user 'DifferenceEngineNewHeader':Allows extensions to change the $newHeader variable, which contains information about the new revision, such as the revision 's author, whether the revision was marked as a minor edit or not, etc. $differenceEngine:DifferenceEngine object & $newHeader:The string containing the various #mw-diff-otitle[1-5] divs, which include things like revision author info, revision comment, RevisionDelete link and more $formattedRevisionTools:Array containing revision tools, some of which may have been injected with the DiffRevisionTools hook $nextlink:String containing the link to the next revision(if any) $status
Definition hooks.txt:1266
either a unescaped string or a HtmlArmor object after in associative array form externallinks including delete and has completed for all link tables whether this was an auto creation use $formDescriptor instead default is conds Array Extra conditions for the No matching items in log is displayed if loglist is empty msgKey Array If you want a nice box with a set this to the key of the message First element is the message additional optional elements are parameters for the key that are processed with wfMessage() -> params() ->parseAsBlock() - offset Set to overwrite offset parameter in $wgRequest set to '' to unset offset - wrap String Wrap the message in html(usually something like "&lt;div ...>$1&lt;/div>"). - flags Integer display flags(NO_ACTION_LINK, NO_EXTRA_USER_LINKS) 'LogException':Called before an exception(or PHP error) is logged. This is meant for integration with external error aggregation services
return true to allow those checks to and false if checking is done & $user
Definition hooks.txt:1510
returning false will NOT prevent logging $e
Definition hooks.txt:2175
injection txt This is an overview of how MediaWiki makes use of dependency injection The design described here grew from the discussion of RFC T384 The term dependency this means that anything an object needs to operate should be injected from the the object itself should only know narrow no concrete implementation of the logic it relies on The requirement to inject everything typically results in an architecture that based on two main types of and essentially stateless service objects that use other service objects to operate on the value objects As of the beginning MediaWiki is only starting to use the DI approach Much of the code still relies on global state or direct resulting in a highly cyclical dependency which acts as the top level factory for services in MediaWiki which can be used to gain access to default instances of various services MediaWikiServices however also allows new services to be defined and default services to be redefined Services are defined or redefined by providing a callback the instantiator that will return a new instance of the service When it will create an instance of MediaWikiServices and populate it with the services defined in the files listed by thereby bootstrapping the DI framework Per $wgServiceWiringFiles lists includes ServiceWiring php
Definition injection.txt:37
const DBO_TRX
Definition defines.php:12