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1 | <?php |
2 | /** |
3 | * An interface to delete a "Cargo table", which can be one or more real |
4 | * database tables. |
5 | * |
6 | * @author Yaron Koren |
7 | * @ingroup Cargo |
8 | */ |
9 | |
10 | class SpecialSwitchCargoTable extends UnlistedSpecialPage { |
11 | |
12 | public function __construct() { |
13 | parent::__construct( 'SwitchCargoTable', 'recreatecargodata' ); |
14 | } |
15 | |
16 | public function doesWrites() { |
17 | return true; |
18 | } |
19 | |
20 | /** |
21 | * The table being switched here is a Cargo table, not a DB table per |
22 | * se - a Cargo table corresponds to a main DB table, plus |
23 | * potentially one or more helper tables; all need to be switched. |
24 | * Also, records need to be removed, and modified, in the cargo_tables and |
25 | * cargo_pages tables. |
26 | */ |
27 | public static function switchInTableReplacement( |
28 | $mainTable, |
29 | $fieldTables, |
30 | $fieldHelperTables, |
31 | User $user |
32 | ) { |
33 | $cdb = CargoUtils::getDB(); |
34 | $origFieldTableNames = []; |
35 | $origFieldHelperTableNames = []; |
36 | try { |
37 | $cdb->begin(); |
38 | |
39 | // The helper tables' names come from the database, |
40 | // so they already contain '__NEXT' - remove that, |
41 | // instead of adding it, when getting table names. |
42 | foreach ( $fieldTables as $fieldTable ) { |
43 | $origFieldTable = str_replace( '__NEXT', '', $fieldTable ); |
44 | $origFieldTableNames[] = $origFieldTable; |
45 | $cdb->dropTable( $origFieldTable ); |
46 | $cdb->query( 'ALTER TABLE ' . |
47 | $cdb->tableName( $fieldTable ) . |
48 | ' RENAME TO ' . |
49 | $cdb->tableName( $origFieldTable ) ); |
50 | } |
51 | if ( is_array( $fieldHelperTables ) ) { |
52 | foreach ( $fieldHelperTables as $fieldHelperTable ) { |
53 | $origFieldHelperTable = str_replace( '__NEXT', '', $fieldHelperTable ); |
54 | $origFieldHelperTableNames[] = $origFieldHelperTable; |
55 | $cdb->dropTable( $origFieldHelperTable ); |
56 | $cdb->query( 'ALTER TABLE ' . |
57 | $cdb->tableName( $fieldHelperTable ) . |
58 | ' RENAME TO ' . |
59 | $cdb->tableName( $origFieldHelperTable ) ); |
60 | } |
61 | } |
62 | |
63 | $cdb->dropTable( $mainTable ); |
64 | $cdb->query( 'ALTER TABLE ' . |
65 | $cdb->tableName( $mainTable . '__NEXT' ) . |
66 | ' RENAME TO ' . $cdb->tableName( $mainTable ) ); |
67 | |
68 | $cdb->commit(); |
69 | } catch ( Exception $e ) { |
70 | throw new MWException( "Caught exception ($e) while trying to switch in replacement for Cargo table. " |
71 | . "Please make sure that your database user account has the DROP permission." ); |
72 | } |
73 | |
74 | $dbw = CargoUtils::getMainDBForWrite(); |
75 | $dbw->delete( 'cargo_tables', [ 'main_table' => $mainTable ] ); |
76 | $dbw->delete( 'cargo_pages', [ 'table_name' => $mainTable ] ); |
77 | $dbw->update( 'cargo_tables', [ 'main_table' => $mainTable ], [ 'main_table' => $mainTable . '__NEXT' ] ); |
78 | $dbw->update( |
79 | 'cargo_tables', |
80 | [ |
81 | 'field_tables' => serialize( $origFieldTableNames ), |
82 | 'field_helper_tables' => serialize( $origFieldHelperTableNames ) |
83 | ], |
84 | [ 'main_table' => $mainTable ] |
85 | ); |
86 | $dbw->update( 'cargo_pages', [ 'table_name' => $mainTable ], [ 'table_name' => $mainTable . '__NEXT' ] ); |
87 | |
88 | CargoUtils::logTableAction( 'replacetable', $mainTable, $user ); |
89 | } |
90 | |
91 | public function execute( $subpage = false ) { |
92 | $this->checkPermissions(); |
93 | |
94 | $out = $this->getOutput(); |
95 | $tableName = $subpage; |
96 | $out->enableOOUI(); |
97 | |
98 | $this->setHeaders(); |
99 | if ( $tableName == '' ) { |
100 | CargoUtils::displayErrorMessage( $out, $this->msg( "cargo-notable" ) ); |
101 | return true; |
102 | } |
103 | |
104 | // Make sure that this table, and its replacement, both exist. |
105 | $dbr = CargoUtils::getMainDBForRead(); |
106 | $res = $dbr->select( 'cargo_tables', [ 'main_table', 'field_tables', 'field_helper_tables' ], |
107 | [ 'main_table' => $tableName ] ); |
108 | if ( $res->numRows() == 0 ) { |
109 | CargoUtils::displayErrorMessage( $out, $this->msg( "cargo-unknowntable", $tableName ) ); |
110 | return true; |
111 | } |
112 | $res = $dbr->select( 'cargo_tables', [ 'main_table', 'field_tables', 'field_helper_tables' ], |
113 | [ 'main_table' => $tableName . '__NEXT' ] ); |
114 | if ( $res->numRows() == 0 ) { |
115 | CargoUtils::displayErrorMessage( $out, $this->msg( "cargo-unknowntable", $tableName . "__NEXT" ) ); |
116 | return true; |
117 | } |
118 | |
119 | $ctPage = CargoUtils::getSpecialPage( 'CargoTables' ); |
120 | $row = $res->fetchRow(); |
121 | $fieldTables = unserialize( $row['field_tables'] ); |
122 | $fieldHelperTables = unserialize( $row['field_helper_tables'] ); |
123 | |
124 | if ( $this->getRequest()->getCheck( 'switch' ) ) { |
125 | self::switchInTableReplacement( $tableName, $fieldTables, $fieldHelperTables, $this->getUser() ); |
126 | $text = Html::element( 'p', null, $this->msg( 'cargo-switchtables-success', $tableName )->parse() ) . "\n"; |
127 | $tablesLink = CargoUtils::makeLink( $this->getLinkRenderer(), |
128 | $ctPage->getPageTitle(), $ctPage->getDescription() ); |
129 | $text .= Html::rawElement( 'p', null, $this->msg( 'returnto', $tablesLink )->text() ); |
130 | $out->addHTML( $text ); |
131 | return true; |
132 | } |
133 | |
134 | $ctURL = $ctPage->getPageTitle()->getLocalURL(); |
135 | $tableLink = Html::element( 'a', [ 'href' => "$ctURL/$tableName", ], $tableName ); |
136 | |
137 | $text = Html::rawElement( 'p', null, $this->msg( 'cargo-switchtables-confirm', $tableLink )->text() ); |
138 | $out->addHTML( $text ); |
139 | |
140 | $htmlForm = HTMLForm::factory( 'ooui', [], $this->getContext() ); |
141 | $htmlForm |
142 | ->setSubmitName( 'switch' ) |
143 | ->setSubmitTextMsg( 'cargo-switchtables-switch' ) |
144 | ->prepareForm() |
145 | ->displayForm( false ); |
146 | |
147 | return true; |
148 | } |
149 | |
150 | } |