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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Extension\SecurePoll\Entities; |
| 4 | |
| 5 | use MediaWiki\Extension\SecurePoll\Context; |
| 6 | use MediaWiki\MediaWikiServices; |
| 7 | use MediaWiki\SpecialPage\SpecialPage; |
| 8 | use Xml; |
| 9 | |
| 10 | /** |
| 11 | * There are three types of entity: elections, questions and options. The |
| 12 | * entity abstraction provides generic i18n support, allowing localised message |
| 13 | * text to be attached to the entity, without introducing a dependency on the |
| 14 | * editability of the MediaWiki namespace. Users are only allowed to edit messages |
| 15 | * for the elections that they administer. |
| 16 | * |
| 17 | * Entities also provide a persistent key/value pair interface for non-localised |
| 18 | * properties, and a descendant tree which is used to accelerate message loading. |
| 19 | */ |
| 20 | class Entity { |
| 21 | /** @var int|false */ |
| 22 | public $id; |
| 23 | /** @var int|null */ |
| 24 | public $electionId; |
| 25 | /** @var Context */ |
| 26 | public $context; |
| 27 | /** @var array */ |
| 28 | public $messagesLoaded = []; |
| 29 | /** @var array|null */ |
| 30 | public $properties; |
| 31 | /** @var string */ |
| 32 | public $type; |
| 33 | |
| 34 | /** |
| 35 | * Create an entity of the given type. This is typically called from the |
| 36 | * child constructor. |
| 37 | * @param Context $context |
| 38 | * @param string $type |
| 39 | * @param array $info Associative array of entity info |
| 40 | */ |
| 41 | public function __construct( $context, $type, $info ) { |
| 42 | $this->context = $context; |
| 43 | $this->type = $type; |
| 44 | $this->id = $info['id'] ?? false; |
| 45 | $this->electionId = $info['election'] ?? null; |
| 46 | } |
| 47 | |
| 48 | /** |
| 49 | * Get the type of the entity. |
| 50 | * @return string |
| 51 | */ |
| 52 | public function getType() { |
| 53 | return $this->type; |
| 54 | } |
| 55 | |
| 56 | /** |
| 57 | * Get a list of localisable message names. This is used to provide the |
| 58 | * translate subpage with a list of messages to localise. |
| 59 | * @return array |
| 60 | */ |
| 61 | public function getMessageNames() { |
| 62 | # STUB |
| 63 | return []; |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | * Get the entity ID. |
| 68 | * @return int |
| 69 | */ |
| 70 | public function getId() { |
| 71 | return $this->id; |
| 72 | } |
| 73 | |
| 74 | /** |
| 75 | * Get the parent election |
| 76 | * @return Election|null |
| 77 | */ |
| 78 | public function getElection() { |
| 79 | return $this->electionId !== null ? $this->context->getElection( $this->electionId ) : null; |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * Get the child entity objects. When the messages of an object are loaded, |
| 84 | * the messages of the children are loaded automatically, to reduce the |
| 85 | * query count. |
| 86 | * |
| 87 | * @return array |
| 88 | */ |
| 89 | public function getChildren() { |
| 90 | return []; |
| 91 | } |
| 92 | |
| 93 | /** |
| 94 | * Get all children, grandchildren, etc. in a single flat array of entity |
| 95 | * objects. |
| 96 | * @return array |
| 97 | */ |
| 98 | public function getDescendants() { |
| 99 | $descendants = []; |
| 100 | $children = $this->getChildren(); |
| 101 | foreach ( $children as $child ) { |
| 102 | $descendants[] = $child; |
| 103 | $descendants = array_merge( $descendants, $child->getDescendants() ); |
| 104 | } |
| 105 | |
| 106 | return $descendants; |
| 107 | } |
| 108 | |
| 109 | /** |
| 110 | * Load messages for a given language. It's not generally necessary to call |
| 111 | * this since getMessage() does it automatically. |
| 112 | * @param string|false $lang |
| 113 | */ |
| 114 | public function loadMessages( $lang = false ) { |
| 115 | if ( $lang === false ) { |
| 116 | $lang = reset( $this->context->languages ); |
| 117 | } |
| 118 | $ids = [ $this->getId() ]; |
| 119 | foreach ( $this->getDescendants() as $child ) { |
| 120 | $ids[] = $child->getId(); |
| 121 | } |
| 122 | $this->context->getMessages( $lang, $ids ); |
| 123 | $this->messagesLoaded[$lang] = true; |
| 124 | } |
| 125 | |
| 126 | /** |
| 127 | * Load the properties for the entity. It is not generally necessary to |
| 128 | * call this function from another class since getProperty() does it |
| 129 | * automatically. |
| 130 | */ |
| 131 | public function loadProperties() { |
| 132 | $properties = $this->context->getStore()->getProperties( [ $this->getId() ] ); |
| 133 | if ( count( $properties ) ) { |
| 134 | $this->properties = reset( $properties ); |
| 135 | } else { |
| 136 | $this->properties = []; |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | /** |
| 141 | * Get a message, or false if the message does not exist. Does not use |
| 142 | * the fallback sequence. |
| 143 | * |
| 144 | * @param string $name |
| 145 | * @param string $language |
| 146 | * @return string|false |
| 147 | */ |
| 148 | public function getRawMessage( $name, $language ) { |
| 149 | if ( empty( $this->messagesLoaded[$language] ) ) { |
| 150 | $this->loadMessages( $language ); |
| 151 | } |
| 152 | |
| 153 | return $this->context->getMessage( $language, $this->getId(), $name ); |
| 154 | } |
| 155 | |
| 156 | /** |
| 157 | * Get a message, and go through the fallback sequence if it is not found. |
| 158 | * If the message is not found even after looking at all possible languages, |
| 159 | * a placeholder string is returned. |
| 160 | * |
| 161 | * @param string $name |
| 162 | * @return string |
| 163 | */ |
| 164 | public function getMessage( $name ) { |
| 165 | foreach ( $this->context->languages as $language ) { |
| 166 | if ( empty( $this->messagesLoaded[$language] ) ) { |
| 167 | $this->loadMessages( $language ); |
| 168 | } |
| 169 | $message = $this->getRawMessage( $name, $language ); |
| 170 | if ( $message !== false ) { |
| 171 | return $message; |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | return "[$name]"; |
| 176 | } |
| 177 | |
| 178 | /** |
| 179 | * Get a message, and interpret it as wikitext, converting it to HTML. |
| 180 | * @param string $name |
| 181 | * @param bool $block |
| 182 | * @return string |
| 183 | */ |
| 184 | public function parseMessage( $name, $block = true ) { |
| 185 | global $wgTitle; |
| 186 | $parserOptions = $this->context->getParserOptions(); |
| 187 | if ( $wgTitle ) { |
| 188 | $title = $wgTitle; |
| 189 | } else { |
| 190 | $title = SpecialPage::getTitleFor( 'SecurePoll' ); |
| 191 | } |
| 192 | $wikiText = $this->getMessage( $name ); |
| 193 | $out = MediaWikiServices::getInstance()->getParser()->parse( |
| 194 | $wikiText, |
| 195 | $title, |
| 196 | $parserOptions |
| 197 | ); |
| 198 | |
| 199 | $html = $out->getText( [ 'unwrap' => true ] ); |
| 200 | if ( !$block ) { |
| 201 | $html = \Parser::stripOuterParagraph( $html ); |
| 202 | } |
| 203 | return $html; |
| 204 | } |
| 205 | |
| 206 | /** |
| 207 | * Get a message and convert it from wikitext to HTML, without <p> tags. |
| 208 | * @param string $name |
| 209 | * @return string |
| 210 | */ |
| 211 | public function parseMessageInline( $name ) { |
| 212 | return $this->parseMessage( $name, false ); |
| 213 | } |
| 214 | |
| 215 | /** |
| 216 | * Get a list of languages for which we have translations, for this entity |
| 217 | * and its descendants. |
| 218 | * @return string[] |
| 219 | */ |
| 220 | public function getLangList() { |
| 221 | $ids = [ $this->getId() ]; |
| 222 | foreach ( $this->getDescendants() as $child ) { |
| 223 | $ids[] = $child->getId(); |
| 224 | } |
| 225 | |
| 226 | return $this->context->getStore()->getLangList( $ids ); |
| 227 | } |
| 228 | |
| 229 | /** |
| 230 | * Get a property value. If it does not exist, the $default parameter |
| 231 | * is passed back. |
| 232 | * @param string $name |
| 233 | * @param mixed $default |
| 234 | * @return bool|mixed |
| 235 | */ |
| 236 | public function getProperty( $name, $default = false ) { |
| 237 | if ( $this->properties === null ) { |
| 238 | $this->loadProperties(); |
| 239 | } |
| 240 | |
| 241 | return $this->properties[$name] ?? $default; |
| 242 | } |
| 243 | |
| 244 | /** |
| 245 | * Get all defined properties as an associative array |
| 246 | * @return array |
| 247 | */ |
| 248 | public function getAllProperties() { |
| 249 | if ( $this->properties === null ) { |
| 250 | $this->loadProperties(); |
| 251 | } |
| 252 | |
| 253 | return $this->properties; |
| 254 | } |
| 255 | |
| 256 | /** |
| 257 | * Get configuration XML. Overridden by most subclasses. |
| 258 | * @param array $params |
| 259 | * @return string |
| 260 | */ |
| 261 | public function getConfXml( $params = [] ) { |
| 262 | return "<{$this->type}>\n" . $this->getConfXmlEntityStuff( $params ) . "</{$this->type}>\n"; |
| 263 | } |
| 264 | |
| 265 | /** |
| 266 | * Get an XML snippet giving the messages and properties |
| 267 | * @param array $params |
| 268 | * @return string |
| 269 | */ |
| 270 | public function getConfXmlEntityStuff( $params = [] ) { |
| 271 | $s = Xml::element( 'id', [], (string)$this->getId() ) . "\n"; |
| 272 | $excludedNames = $this->getPropertyDumpExclusion( $params ); |
| 273 | foreach ( $this->getAllProperties() as $name => $value ) { |
| 274 | if ( !in_array( $name, $excludedNames ) ) { |
| 275 | $s .= Xml::element( 'property', [ 'name' => $name ], $value ) . "\n"; |
| 276 | } |
| 277 | } |
| 278 | $langs = $params['langs'] ?? $this->context->languages; |
| 279 | foreach ( $this->getMessageNames() as $name ) { |
| 280 | foreach ( $langs as $lang ) { |
| 281 | $value = $this->getRawMessage( $name, $lang ); |
| 282 | if ( $value !== false ) { |
| 283 | $s .= Xml::element( |
| 284 | 'message', |
| 285 | [ |
| 286 | 'name' => $name, |
| 287 | 'lang' => $lang |
| 288 | ], |
| 289 | $value |
| 290 | ) . "\n"; |
| 291 | } |
| 292 | } |
| 293 | } |
| 294 | |
| 295 | return $s; |
| 296 | } |
| 297 | |
| 298 | /** |
| 299 | * Get property names which aren't included in an XML dump. |
| 300 | * Overloaded by Election. |
| 301 | * @param array $params |
| 302 | * @return array |
| 303 | */ |
| 304 | public function getPropertyDumpExclusion( $params = [] ) { |
| 305 | return []; |
| 306 | } |
| 307 | |
| 308 | } |