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1 | <?php |
2 | |
3 | namespace AutoModerator\Config; |
4 | |
5 | use MediaWiki\Config\Config; |
6 | use MediaWiki\Config\ConfigException; |
7 | use MediaWiki\Settings\Config\MergeStrategy; |
8 | |
9 | /** |
10 | * Config loader for wiki page config |
11 | * |
12 | * This class consults the allow list |
13 | * in AutoModeratorWikiConfigLoader::ALLOW_LIST, and runs |
14 | * WikiPageConfig if requested config variable is there. Otherwise, |
15 | * it throws an exception. |
16 | * |
17 | * Fallback to GlobalVarConfig is implemented, so developer setup |
18 | * works without any config page, and also to not let wikis break |
19 | * AutoModerator setup by removing an arbitrary config variable. |
20 | */ |
21 | class AutoModeratorWikiConfigLoader implements Config, ICustomReadConstants { |
22 | |
23 | private WikiPageConfig $wikiPageConfig; |
24 | private Config $globalVarConfig; |
25 | |
26 | public const ALLOW_LIST = [ |
27 | 'AutoModeratorEnableRevisionCheck', |
28 | 'AutoModeratorFalsePositivePageTitle', |
29 | 'AutoModeratorUseEditFlagMinor', |
30 | 'AutoModeratorRevertTalkPageMessageEnabled', |
31 | 'AutoModeratorEnableBotFlag', |
32 | 'AutoModeratorSkipUserRights', |
33 | 'AutoModeratorCautionLevel', |
34 | 'AutoModeratorEnableUserRevertsPerPage', |
35 | 'AutoModeratorUserRevertsPerPage', |
36 | 'AutoModeratorHelpPageLink', |
37 | 'AutoModeratorMultilingualConfigEnableRevisionCheck', |
38 | 'AutoModeratorMultilingualConfigFalsePositivePageTitle', |
39 | 'AutoModeratorMultilingualConfigUseEditFlagMinor', |
40 | 'AutoModeratorMultilingualConfigRevertTalkPageMessageEnabled', |
41 | 'AutoModeratorMultilingualConfigEnableBotFlag', |
42 | 'AutoModeratorMultilingualConfigSkipUserRights', |
43 | 'AutoModeratorMultilingualConfigCautionLevel', |
44 | 'AutoModeratorMultilingualConfigEnableUserRevertsPerPage', |
45 | 'AutoModeratorMultilingualConfigUserRevertsPerPage', |
46 | 'AutoModeratorMultilingualConfigHelpPageLink', |
47 | 'AutoModeratorMultilingualConfigEnableLanguageAgnostic', |
48 | 'AutoModeratorMultilingualConfigEnableMultilingual', |
49 | 'AutoModeratorMultilingualConfigMultilingualThreshold', |
50 | 'AutoModeratorMultilingualConfigConfigureThreshold' |
51 | ]; |
52 | |
53 | /** |
54 | * Map of variable name => merge strategy. Defaults to replace. |
55 | * @see MergeStrategy |
56 | */ |
57 | public const MERGE_STRATEGIES = []; |
58 | |
59 | /** |
60 | * @param WikiPageConfig $wikiPageConfig |
61 | * @param Config $globalVarConfig |
62 | */ |
63 | public function __construct( |
64 | WikiPageConfig $wikiPageConfig, |
65 | Config $globalVarConfig |
66 | ) { |
67 | $this->wikiPageConfig = $wikiPageConfig; |
68 | $this->globalVarConfig = $globalVarConfig; |
69 | } |
70 | |
71 | /** |
72 | * @param string $name |
73 | * @return bool |
74 | */ |
75 | private function variableIsAllowed( $name ) { |
76 | return in_array( $name, self::ALLOW_LIST ); |
77 | } |
78 | |
79 | /** |
80 | * Determine if on-wiki config is enabled or not |
81 | * |
82 | * If this returns false, all calls to get()/has() will be immediately |
83 | * forwarded to GlobalVarConfig, as if there was no on-wiki config. |
84 | * |
85 | * @return bool |
86 | */ |
87 | public function isWikiConfigEnabled(): bool { |
88 | return (bool)$this->globalVarConfig->get( 'AutoModeratorEnableWikiConfig' ); |
89 | } |
90 | |
91 | /** |
92 | * @inheritDoc |
93 | */ |
94 | public function get( $name ) { |
95 | return $this->getWithFlags( $name ); |
96 | } |
97 | |
98 | /** |
99 | * @param string $name |
100 | * @param int $flags bit field, see IDBAccessObject::READ_XXX |
101 | * @return mixed Config value |
102 | */ |
103 | public function getWithFlags( string $name, int $flags = 0 ) { |
104 | if ( !$this->isWikiConfigEnabled() ) { |
105 | return $this->globalVarConfig->get( $name ); |
106 | } |
107 | |
108 | if ( !$this->variableIsAllowed( $name ) ) { |
109 | throw new ConfigException( 'Config key cannot be retrieved via AutoModeratorWikiConfigLoader' ); |
110 | } |
111 | |
112 | if ( $this->wikiPageConfig->hasWithFlags( $name, $flags ) ) { |
113 | $wikiValue = $this->wikiPageConfig->getWithFlags( $name, $flags ); |
114 | $mergeStrategy = self::MERGE_STRATEGIES[$name] ?? null; |
115 | if ( !$mergeStrategy || !$this->globalVarConfig->has( $name ) ) { |
116 | return $wikiValue; |
117 | } |
118 | $globalValue = $this->globalVarConfig->get( $name ); |
119 | return MergeStrategy::newFromName( $mergeStrategy )->merge( $globalValue, $wikiValue ); |
120 | } |
121 | |
122 | if ( $this->globalVarConfig->has( $name ) ) { |
123 | return $this->globalVarConfig->get( $name ); |
124 | } |
125 | |
126 | throw new ConfigException( 'Config key was not found in AutoModeratorWikiConfigLoader' ); |
127 | } |
128 | |
129 | /** |
130 | * @inheritDoc |
131 | */ |
132 | public function has( $name ): bool { |
133 | return $this->hasWithFlags( $name ); |
134 | } |
135 | |
136 | /** |
137 | * @param string $name |
138 | * @param int $flags |
139 | * @return bool |
140 | */ |
141 | public function hasWithFlags( string $name, int $flags = 0 ): bool { |
142 | if ( !$this->isWikiConfigEnabled() ) { |
143 | return $this->globalVarConfig->has( $name ); |
144 | } |
145 | |
146 | return $this->variableIsAllowed( $name ) && ( |
147 | $this->wikiPageConfig->hasWithFlags( $name, $flags ) || |
148 | $this->globalVarConfig->has( $name ) |
149 | ); |
150 | } |
151 | } |