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<?php |
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/** |
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* Class for handling concept property values. |
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*/ |
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class ConceptPropertyValue extends VocabularyDataObject |
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{ |
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/** submembers */ |
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private $submembers; |
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/** property type */ |
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private $type; |
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/** content language */ |
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private $clang; |
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/** whether the property value is external w.r.t. to the subject resource */ |
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private $external; |
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/** ordered list items if this value is an RDF list */ |
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private $listItems; |
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/** whether the RDF list was truncated due to max limit */ |
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private $listTruncated; |
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public function __construct($model, $vocab, $resource, $prop, $clang = '') |
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{ |
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parent::__construct($model, $vocab, $resource); |
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$this->submembers = array(); |
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$this->type = $prop; |
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$this->clang = $clang; |
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$this->listItems = null; |
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$this->listTruncated = false; |
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// check if the resource is external to the current vocabulary |
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$this->external = ($this->getLabel('', 'null', false) === null); |
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if ($this->external) { |
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// if we find the resource in another vocabulary, use it instead |
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$exvocab = $this->getExVocab(); |
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if ($exvocab !== null) { |
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$this->vocab = $exvocab; |
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} |
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} |
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// check if this resource is an RDF list and parse it |
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$this->parseRdfList(); |
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} |
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public function __toString() |
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{ |
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return is_string($this->getLabel()) ? $this->getLabel() : $this->getLabel()->getValue(); |
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} |
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public function getLang() |
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{ |
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return $this->model->getLocale(); |
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} |
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public function getSortKey() |
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{ |
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return strtolower($this->getLabel()); |
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} |
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public function getLabel($lang = '', $fallbackToUri = 'uri', $allowExternal = true) |
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{ |
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if ($this->clang) { |
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$lang = $this->clang; |
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} |
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if ($this->vocab->getConfig()->getLanguageOrder($lang)) { |
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foreach ($this->vocab->getConfig()->getLanguageOrder($lang) as $fallback) { |
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if ($this->resource->label($fallback) !== null) { |
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return $this->resource->label($fallback); |
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} |
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// We need to check all the labels in case one of them matches a subtag of the current language |
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if ($this->resource->allLiterals('skos:prefLabel')) { |
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foreach ($this->resource->allLiterals('skos:prefLabel') as $label) { |
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// the label lang code is a subtag of the UI lang eg. en-GB - create a new literal with the main language |
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if ($label !== null && strpos($label->getLang(), $fallback . '-') === 0) { |
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return EasyRdf\Literal::create($label, $fallback); |
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} |
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} |
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} |
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} |
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} |
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if ($this->resource->label($lang) !== null) { // current language |
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return $this->resource->label($lang); |
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} elseif ($this->resource->label($this->vocab->getConfig()->getDefaultLanguage()) !== null) { // vocab default language |
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return $this->resource->label($this->vocab->getConfig()->getDefaultLanguage()); |
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} elseif ($this->resource->label() !== null) { // any language |
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return $this->resource->label(); |
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} elseif ($this->resource->getLiteral('rdf:value', $lang) !== null) { // current language |
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return $this->resource->getLiteral('rdf:value', $lang); |
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} elseif ($this->resource->getLiteral('rdf:value') !== null) { // any language |
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return $this->resource->getLiteral('rdf:value'); |
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} |
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// see if we can find a label in another vocabulary known by the skosmos instance |
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if ($allowExternal) { |
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$label = $this->getExternalLabel($this->vocab, $this->getUri(), $lang); |
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if ($label) { |
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return $label; |
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} |
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} |
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if ($fallbackToUri == 'uri') { |
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// return uri if no label is found |
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return $this->resource->shorten() ? $this->resource->shorten() : $this->getUri(); |
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} |
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return null; |
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} |
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public function getType() |
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{ |
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return $this->type; |
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} |
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public function getUri() |
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{ |
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return $this->resource->getUri(); |
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} |
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public function getExVocab() |
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{ |
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return $this->model->guessVocabularyFromURI($this->getUri(), $this->vocab->getId()); |
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} |
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public function getVocab() |
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{ |
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return $this->vocab; |
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} |
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public function getVocabName() |
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{ |
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return $this->vocab->getShortName(); |
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} |
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public function addSubMember($member, $lang = '') |
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{ |
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$label = $member->getLabel($lang) ? $member->getLabel($lang) : $member->getLabel(); |
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$this->submembers[$label->getValue()] = $member; |
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$this->sortSubMembers(); |
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} |
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public function getSubMembers() |
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{ |
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if (empty($this->submembers)) { |
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return null; |
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} |
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return $this->submembers; |
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} |
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private function sortSubMembers() |
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{ |
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if (!empty($this->submembers)) { |
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ksort($this->submembers); |
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} |
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} |
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public function isExternal() |
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{ |
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return $this->external; |
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} |
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public function getNotation() |
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{ |
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if ($this->vocab->getConfig()->showNotation() && $this->resource->get('skos:notation')) { |
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return $this->resource->get('skos:notation')->getValue(); |
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} |
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} |
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public function isReified() |
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{ |
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return (!$this->resource->label() && $this->resource->getLiteral('rdf:value')); |
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} |
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public function getReifiedPropertyValues() |
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{ |
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$ret = array(); |
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$props = $this->resource->propertyUris(); |
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foreach ($props as $prop) { |
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$prop = (EasyRdf\RdfNamespace::shorten($prop) !== null) ? EasyRdf\RdfNamespace::shorten($prop) : $prop; |
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$propkey = str_starts_with($prop, 'dc11:') ? |
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str_replace('dc11:', 'dc:', $prop) : $prop; |
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foreach ($this->resource->allLiterals($prop) as $val) { |
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if ($prop !== 'rdf:value') { // shown elsewhere |
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$ret[$this->model->getText($propkey)] = new ConceptPropertyValueLiteral($this->model, $this->vocab, $this->resource, $val, $prop); |
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} |
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} |
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foreach ($this->resource->allResources($prop) as $val) { |
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$ret[$this->model->getText($propkey)] = new ConceptPropertyValue($this->model, $this->vocab, $val, $prop, $this->clang); |
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} |
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} |
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return $ret; |
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} |
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/** |
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* Check if this resource represents an RDF list (has rdf:first property) |
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* and parse the list items in order |
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*/ |
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private function parseRdfList() |
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{ |
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// Check if this resource has rdf:first (indicating it's a list node) |
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if ($this->resource->getResource('rdf:first') === null) { |
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return; // Not an RDF list |
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} |
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$this->listItems = array(); |
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$currentNode = $this->resource; |
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$itemsLimit = $this->model->getConfig()->getRdfListItemsLimit(); |
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$iteration = 0; |
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while ($currentNode !== null && !($itemsLimit > 0 && $iteration >= $itemsLimit)) { |
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$item = $currentNode->getResource('rdf:first'); |
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if ($item !== null) { |
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$listItemValue = new ConceptPropertyValue($this->model, $this->vocab, $item, $this->type, $this->clang); |
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$this->listItems[] = $listItemValue; |
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} |
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$iteration++; |
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$restNode = $currentNode->getResource('rdf:rest'); |
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$isEndOfList = $restNode === null || $restNode->getUri() === 'http://www.w3.org/1999/02/22-rdf-syntax-ns#nil'; |
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if ($isEndOfList) { |
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$this->listTruncated = false; |
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$currentNode = null; |
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} else { |
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$currentNode = $restNode; |
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} |
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} |
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if ($currentNode !== null && $itemsLimit > 0 && $iteration >= $itemsLimit) { |
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$this->listTruncated = true; |
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} |
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} |
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public function isRdfList() |
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{ |
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return $this->listItems !== null && count($this->listItems) > 0; |
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} |
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public function getRdfListItems() |
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{ |
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return $this->listItems; |
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} |
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public function isRdfListTruncated() |
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{ |
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return $this->listTruncated; |
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} |
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} |
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NatLibFi /
Skosmos
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