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1 | <?php |
2 | |
3 | namespace CirrusSearch\Search; |
4 | |
5 | use CirrusSearch\Searcher; |
6 | use CirrusSearch\Util; |
7 | use File; |
8 | use LogicException; |
9 | use MediaWiki\MediaWikiServices; |
10 | use MediaWiki\Title\Title; |
11 | use SearchResult; |
12 | use SearchResultTrait; |
13 | |
14 | /** |
15 | * Base class for SearchResult |
16 | */ |
17 | abstract class CirrusSearchResult extends SearchResult { |
18 | use SearchResultTrait; |
19 | |
20 | /** |
21 | * @var string Counter title for identified missing revisions |
22 | */ |
23 | private const MISSING_REVISION_TOTAL = 'missing_revision_total'; |
24 | |
25 | /** |
26 | * @var Title |
27 | */ |
28 | private $title; |
29 | |
30 | /** |
31 | * @var ?File |
32 | */ |
33 | private $file; |
34 | |
35 | /** |
36 | * @var bool |
37 | */ |
38 | private $checkedForFile = false; |
39 | |
40 | /** |
41 | * @param Title $title |
42 | */ |
43 | public function __construct( Title $title ) { |
44 | $this->title = $title; |
45 | } |
46 | |
47 | /** |
48 | * Initialize from a Title and if possible initializes a corresponding |
49 | * File. |
50 | * |
51 | * @param Title $title |
52 | */ |
53 | final protected function initFromTitle( $title ) { |
54 | // Everything is done in the constructor. |
55 | // XXX: we do not call the SearchResultInitFromTitle hook |
56 | // this hook is designed to fetch a particular revision |
57 | // but the way cirrus works does not allow to vary the revision |
58 | // text being displayed at query time. |
59 | } |
60 | |
61 | /** |
62 | * Check if this is result points to an invalid title |
63 | * |
64 | * @return bool |
65 | */ |
66 | final public function isBrokenTitle() { |
67 | // Title is mandatory in the constructor it would have failed earlier if the Title was broken |
68 | return false; |
69 | } |
70 | |
71 | /** |
72 | * Check if target page is missing, happens when index is out of date |
73 | * |
74 | * @return bool |
75 | */ |
76 | final public function isMissingRevision() { |
77 | global $wgCirrusSearchDevelOptions; |
78 | if ( isset( $wgCirrusSearchDevelOptions['ignore_missing_rev'] ) ) { |
79 | return false; |
80 | } |
81 | if ( !$this->getTitle()->isKnown() ) { |
82 | $this->increment( self::MISSING_REVISION_TOTAL, 'title' ); |
83 | return true; |
84 | } |
85 | // Similarly if we matched due to a redirect |
86 | if ( $this->getRedirectTitle() && !$this->getRedirectTitle()->isKnown() ) { |
87 | // There may be other reasons this result matched, for now keep it in the results |
88 | // but clear the redirect. |
89 | $redirectIsOnlyMatch = $this->clearRedirectTitle(); |
90 | $this->increment( |
91 | self::MISSING_REVISION_TOTAL, |
92 | $redirectIsOnlyMatch ? 'only_redirect' : 'redirect' |
93 | ); |
94 | } |
95 | |
96 | return false; |
97 | } |
98 | |
99 | private function increment( string $counter, string $problem ) { |
100 | Util::getStatsFactory() |
101 | ->getCounter( $counter ) |
102 | ->setLabel( 'problem', $problem ) |
103 | ->increment(); |
104 | } |
105 | |
106 | /** |
107 | * @return Title |
108 | */ |
109 | final public function getTitle() { |
110 | return $this->title; |
111 | } |
112 | |
113 | /** |
114 | * Get the file for this page, if one exists |
115 | * @return File|null |
116 | */ |
117 | final public function getFile() { |
118 | if ( !$this->checkedForFile && $this->getTitle()->getNamespace() === NS_FILE ) { |
119 | $this->checkedForFile = true; |
120 | $this->file = MediaWikiServices::getInstance()->getRepoGroup() |
121 | ->findFile( $this->title ); |
122 | } |
123 | return $this->file; |
124 | } |
125 | |
126 | /** |
127 | * Lazy initialization of article text from DB |
128 | * @return never |
129 | */ |
130 | final protected function initText() { |
131 | throw new LogicException( "initText() should not be called on CirrusSearchResult, " . |
132 | "content must be fetched directly from the backend at query time." ); |
133 | } |
134 | |
135 | /** |
136 | * @param string $text A snippet from the search highlighter |
137 | * @return bool True when the string contains highlight markers |
138 | */ |
139 | protected function containsHighlight( string $text ): bool { |
140 | return strpos( $text, Searcher::HIGHLIGHT_PRE ) !== false; |
141 | } |
142 | |
143 | /** |
144 | * @return string |
145 | */ |
146 | abstract public function getDocId(); |
147 | |
148 | /** |
149 | * @return float |
150 | */ |
151 | abstract public function getScore(); |
152 | |
153 | /** |
154 | * @return array|null |
155 | */ |
156 | abstract public function getExplanation(); |
157 | |
158 | /** |
159 | * Clear any redirect match so it won't be part of the result. |
160 | * |
161 | * @return bool True if the redirect was the only snippet available |
162 | * for this result. |
163 | */ |
164 | abstract protected function clearRedirectTitle(): bool; |
165 | } |