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LangLinksTable.php
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1 <?php
2 
4 
5 use ParserOutput;
6 
16 class LangLinksTable extends LinksTable {
17  private $newLinks = [];
18  private $existingLinks;
19 
20  public function setParserOutput( ParserOutput $parserOutput ) {
21  // Convert the format of the interlanguage links
22  // I didn't want to change it in the ParserOutput, because that array is passed all
23  // the way back to the skin, so either a skin API break would be required, or an
24  // inefficient back-conversion.
25  $ill = $parserOutput->getLanguageLinks();
26  $this->newLinks = [];
27  foreach ( $ill as $link ) {
28  [ $key, $title ] = explode( ':', $link, 2 );
29  $this->newLinks[$key] = $title;
30  }
31  }
32 
33  protected function getTableName() {
34  return 'langlinks';
35  }
36 
37  protected function getFromField() {
38  return 'll_from';
39  }
40 
41  protected function getExistingFields() {
42  return [ 'll_lang', 'll_title' ];
43  }
44 
45  protected function getNewLinkIDs() {
46  foreach ( $this->newLinks as $key => $title ) {
47  yield [ (string)$key, $title ];
48  }
49  }
50 
57  private function getExistingLinks() {
58  if ( $this->existingLinks === null ) {
59  $this->existingLinks = [];
60  foreach ( $this->fetchExistingRows() as $row ) {
61  $this->existingLinks[$row->ll_lang] = $row->ll_title;
62  }
63  }
64  return $this->existingLinks;
65  }
66 
67  protected function getExistingLinkIDs() {
68  foreach ( $this->getExistingLinks() as $lang => $title ) {
69  yield [ (string)$lang, $title ];
70  }
71  }
72 
73  protected function isExisting( $linkId ) {
74  $links = $this->getExistingLinks();
75  [ $lang, $title ] = $linkId;
76  return \array_key_exists( $lang, $links )
77  && $links[$lang] === $title;
78  }
79 
80  protected function isInNewSet( $linkId ) {
81  [ $lang, $title ] = $linkId;
82  return \array_key_exists( $lang, $this->newLinks )
83  && $this->newLinks[$lang] === $title;
84  }
85 
86  protected function insertLink( $linkId ) {
87  [ $lang, $title ] = $linkId;
88  $this->insertRow( [
89  'll_lang' => $lang,
90  'll_title' => $title
91  ] );
92  }
93 
94  protected function deleteLink( $linkId ) {
95  $this->deleteRow( [
96  'll_lang' => $linkId[0]
97  ] );
98  }
99 }
getNewLinkIDs()
Get an array (or iterator) of link IDs for the new state.
getExistingLinkIDs()
Get an array (or iterator) of link IDs for the existing state.
insertLink( $linkId)
Insert a link identified by ID.
deleteLink( $linkId)
Delete a link identified by ID.
isExisting( $linkId)
Determine whether a link (from the new set) is in the existing set.
setParserOutput(ParserOutput $parserOutput)
Subclasses should implement this to extract the data they need from the ParserOutput.
getExistingFields()
Get the fields to be used in fetchExistingRows().
isInNewSet( $linkId)
Determine whether a link (from the existing set) is in the new set.
getFromField()
Get the name of the field which links to page_id.
The base class for classes which update a single link table.
Definition: LinksTable.php:41
insertRow( $row)
Queue a row for insertion.
Definition: LinksTable.php:407
fetchExistingRows()
Do a select query to fetch the existing rows.
Definition: LinksTable.php:369
deleteRow( $conds)
Queue a deletion operation.
Definition: LinksTable.php:422
if(!isset( $args[0])) $lang