MediaWiki  master
SpecialUnusedCategories.php
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1 <?php
26 
31 
36  public function __construct(
37  ILoadBalancer $loadBalancer,
38  LinkBatchFactory $linkBatchFactory
39  ) {
40  parent::__construct( 'Unusedcategories' );
41  $this->setDBLoadBalancer( $loadBalancer );
42  $this->setLinkBatchFactory( $linkBatchFactory );
43  }
44 
45  public function isExpensive() {
46  return true;
47  }
48 
49  protected function getPageHeader() {
50  return $this->msg( 'unusedcategoriestext' )->parseAsBlock();
51  }
52 
53  protected function getOrderFields() {
54  return [ 'title' ];
55  }
56 
57  public function getQueryInfo() {
58  return [
59  'tables' => [ 'page', 'categorylinks', 'page_props' ],
60  'fields' => [
61  'namespace' => 'page_namespace',
62  'title' => 'page_title',
63  ],
64  'conds' => [
65  'cl_from IS NULL',
66  'page_namespace' => NS_CATEGORY,
67  'page_is_redirect' => 0,
68  'pp_page IS NULL'
69  ],
70  'join_conds' => [
71  'categorylinks' => [ 'LEFT JOIN', 'cl_to = page_title' ],
72  'page_props' => [ 'LEFT JOIN', [
73  'page_id = pp_page',
74  'pp_propname' => 'expectunusedcategory'
75  ] ]
76  ]
77  ];
78  }
79 
84  protected function sortDescending() {
85  return false;
86  }
87 
93  public function formatResult( $skin, $result ) {
94  $title = Title::makeTitle( NS_CATEGORY, $result->title );
95 
96  return $this->getLinkRenderer()->makeLink( $title, $title->getText() );
97  }
98 
99  protected function getGroupName() {
100  return 'maintenance';
101  }
102 
103  public function preprocessResults( $db, $res ) {
105  }
106 }
const NS_CATEGORY
Definition: Defines.php:78
This is a class for doing query pages; since they're almost all the same, we factor out some of the f...
Definition: QueryPage.php:42
executeLBFromResultWrapper(IResultWrapper $res, $ns=null)
Creates a new LinkBatch object, adds all pages from the passed result wrapper (MUST include title and...
Definition: QueryPage.php:898
setDBLoadBalancer(ILoadBalancer $loadBalancer)
Definition: QueryPage.php:916
setLinkBatchFactory(LinkBatchFactory $linkBatchFactory)
Definition: QueryPage.php:136
msg( $key,... $params)
Wrapper around wfMessage that sets the current context.
getOrderFields()
Subclasses return an array of fields to order by here.
isExpensive()
Should this query page only be updated offline on large wikis?
sortDescending()
A should come before Z (T32907)
preprocessResults( $db, $res)
Do any necessary preprocessing of the result object.
getQueryInfo()
Subclasses return an SQL query here, formatted as an array with the following keys: tables => Table(s...
__construct(ILoadBalancer $loadBalancer, LinkBatchFactory $linkBatchFactory)
getGroupName()
Under which header this special page is listed in Special:SpecialPages See messages 'specialpages-gro...
getPageHeader()
The content returned by this function will be output before any result.
static makeTitle( $ns, $title, $fragment='', $interwiki='')
Create a new Title from a namespace index and a DB key.
Definition: Title.php:641
Create and track the database connections and transactions for a given database cluster.