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<?php
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declare(strict_types=1);
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namespace SKien\JsonLD;
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/**
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* Base class of the package.
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* The class provides all basic functions for generating valid JsonLD objects of
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* different types.
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*
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* @link https://search.google.com/structured-data/testing-tool
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* @link https://developers.google.com/search/docs/guides/sd-policies
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* @link https://www.w3.org/TR/json-ld11/
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*
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* @package JsonLD
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* @author Stefanius <[email protected]>
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* @copyright MIT License - see the LICENSE file for details
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*/
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class JsonLD
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{
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/** constants for JsonLD type */
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public const __TYPE = '';
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/** type: LocalBusiness or subtype */
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public const LOCAL_BUSINESS = 0;
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/** type: Article, NewsArticle, */
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public const ARTICLE = 1;
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/** type: Event */
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public const EVENT = 2;
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/** constants for validation */
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public const __VALIDATION = '';
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/** validation for string */
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public const STRING = 0;
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/** validation for date */
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public const DATE = 1;
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/** validation for time */
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public const TIME = 2;
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/** validation for e-mail */
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public const EMAIL = 3;
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/** validation for url */
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public const URL = 4;
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/** validation for longitude or latitude */
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public const LONG_LAT = 5;
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/** @var int internal object type */
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protected $iType = -1;
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/** @var array<mixed> the linked data as array */
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protected $aJsonLD = null;
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/** @var bool object is nested into another object */
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protected $bIsChild = false;
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/**
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* Instanciation of JsonLD object.
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* @param int $iType internal type
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* @param string $strType type for JsonLD
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* @param bool $bIsChild
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*/
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public function __construct(int $iType, string $strType, bool $bIsChild = false)
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{
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$this->iType = $iType;
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$this->bIsChild = $bIsChild;
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$this->aJsonLD = [
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"@context" => "https://schema.org",
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"@type" => $strType,
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];
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}
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/**
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* Set description text.
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* Usable for all JsonLD types.
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* @param string $strDescription
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*/
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public function setDescription(string $strDescription) : void
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{
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$this->setProperty("description", $strDescription);
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}
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/**
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* Set location for the object.
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* @param string $strName Name for the location
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* @param string|float $latitude latidude
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* @param string|float $longitude longitude
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* @param string $strMap URL to a map that shows the location
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*/
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public function setLocation(string $strName, $latitude, $longitude, string $strMap = '') : void
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{
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$aLocation = $this->buildLocation($strName, $latitude, $longitude, $strMap);
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if ($aLocation != null) {
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if (isset($this->aJsonLD["location"]) && is_array($this->aJsonLD["location"])) {
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$this->aJsonLD["location"] = array_merge($this->aJsonLD["location"], $aLocation);
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} else {
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$this->aJsonLD["location"] = $aLocation;
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}
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}
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}
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/**
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* Add an image.
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* Multiple images are supported. Only existing images can be set.
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* Pixel size (width/height) is detected from image file.
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* @param string $strImageURL
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*/
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public function addImage(string $strImageURL) : void
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{
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$aImg = $this->buildImageObject($strImageURL);
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if ($aImg != null) {
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if (isset($this->aJsonLD["image"])) {
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if (isset($this->aJsonLD["image"]["@type"])) {
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// only one image set so far... change to array for multiple images
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$aFirstImg = $this->aJsonLD["image"];
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$this->aJsonLD["image"] = array();
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$this->aJsonLD["image"][] = $aFirstImg;
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}
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$this->aJsonLD["image"][] = $aImg;
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} else {
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// first image - set property direct
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$this->aJsonLD["image"] = $aImg;
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}
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}
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}
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/**
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* Build ImageObject property.
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* Logos and images are defiend as ImageObject.
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* @param string $strURL URL to a valid image (PNG, GIF, JPG)
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* @return array<string> array containing the property or null if invalid URL
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*/
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protected function buildImageObject(string $strURL) : ?array
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{
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$aLogo = null;
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// use curl to be independet of [allow_url_fopen] enabled on the system
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$curl = curl_init();
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curl_setopt($curl, CURLOPT_URL, $strURL);
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curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
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$image = curl_exec($curl);
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$iReturnCode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
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curl_close($curl);
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if ($iReturnCode == 200 && is_string($image)) {
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$img = imagecreatefromstring($image);
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if ($img !== false) {
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$aLogo = array(
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"@type" => "ImageObject",
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"url" => $strURL,
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"width" => imagesx($img),
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"height" => imagesy($img),
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);
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}
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}
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return $aLogo;
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}
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/**
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* Build a postal adress object.
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* @param string $strStreet
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* @param string $strPostcode
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* @param string $strCity
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* @param string $strRegion
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* @param string $strCountry
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* @return array<string> array containing the property
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*/
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protected function buildAddress(string $strStreet, string $strPostcode, string $strCity, string $strRegion = '', string $strCountry = '') : array
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{
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$aAdress = array("@type" => "PostalAddress");
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if (strlen($strStreet) > 0) {
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$aAdress["streetAddress"] = $this->validString($strStreet);
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}
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if (strlen($strPostcode) > 0) {
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$aAdress["postalCode"] = $this->validString($strPostcode);
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}
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if (strlen($strCity) > 0) {
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$aAdress["addressLocality"] = $this->validString($strCity);
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}
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if (strlen($strCountry) > 0) {
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$aAdress["addressCountry"] = $this->validString($strCountry);
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}
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if (strlen($strCountry) > 0) {
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$aAdress["addressRegion"] = $this->validString($strRegion);
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}
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return $aAdress;
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}
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/**
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* Build a location object.
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* @param string $strName Name for the location
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* @param string|float $latitude
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* @param string|float $longitude
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* @param string $strMap URL to map show the location
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* @return array<mixed> array containing the property or null if invalid URL
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*/
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protected function buildLocation(string $strName, $latitude, $longitude, string $strMap) : ?array
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{
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$aLocation = null;
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$latitude = $this->validLongLat($latitude);
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$longitude = $this->validLongLat($longitude);
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$strMap = $this->validURL($strMap);
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200
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if ((strlen($latitude) > 0 && strlen($longitude) > 0) || strlen($strMap) > 0) {
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$aLocation = array("@type" => "Place");
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$strName = $this->validString($strName);
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if (strlen($strName) > 0) {
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$aLocation["name"] = $strName;
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}
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if (strlen($latitude) > 0 && strlen($longitude) > 0) {
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207
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$aLocation['geo'] = array(
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208
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"@type" => "GeoCoordinates",
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"latitude" => $latitude,
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"longitude" => $longitude
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);
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212
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}
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213
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if (strlen($strMap) > 0) {
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$aLocation["hasMap"] = $strMap;
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}
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}
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return $aLocation;
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}
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220
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/**
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* Build a contact point object.
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222
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* The type must not contain any predefiend value, it is to describe the contact.
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223
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* (i.e. 'Information', 'Hotline', 'Customer Service', 'Administration'...)
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224
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* @param string $strType
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225
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* @param string $strEMail
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* @param string $strPhone
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227
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* @return array<string> array containing the property or null if invalid URL
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*/
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protected function buildContactPoint(string $strType, string $strEMail, string $strPhone) : ?array
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230
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{
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$aCP = null;
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232
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$strType = $this->validString($strType);
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$strEMail = $this->validString($strEMail);
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234
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$strPhone = $this->validString($strPhone);
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235
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if (strlen($strType) > 0) {
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236
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$aCP = array("@type" => "ContactPoint");
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237
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$aCP["contactType"] = $strType;
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238
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if (strlen($strEMail) > 0) {
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239
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$aCP["email"] = $strEMail;
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240
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}
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241
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if (strlen($strPhone) > 0) {
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242
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$aCP["telephone"] = $strPhone;
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243
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}
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244
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}
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245
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return $aCP;
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246
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}
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247
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248
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/**
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249
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* Set the property to value of given type.
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250
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* @param string $strName
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251
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* @param mixed $value
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252
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* @param int $iType
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253
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*/
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254
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public function setProperty(string $strName, $value, int $iType = self::STRING) : void
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255
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{
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256
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$strValue = '';
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257
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switch ($iType) {
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258
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case self::DATE:
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259
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$strValue = $this->validDate($value);
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260
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break;
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261
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case self::TIME:
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262
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$strValue = $this->validTime($value);
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263
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break;
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264
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case self::EMAIL:
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265
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$strValue = $this->validEMail($value);
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266
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break;
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267
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case self::URL:
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268
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$strValue = $this->validURL($value);
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269
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break;
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270
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case self::LONG_LAT:
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271
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$strValue = $this->validLongLat($value);
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272
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break;
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273
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case self::STRING:
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274
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default:
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275
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$strValue = $this->validString($value);
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276
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break;
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277
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}
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278
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if (strlen($strValue) > 0) {
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279
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$this->aJsonLD[$strName] = $strValue;
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280
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}
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281
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}
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|
282
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283
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/**
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|
284
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* Get complete tag for the HTML head.
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|
285
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* (including <script></script>)
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|
286
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* @param bool $bPrettyPrint
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287
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* @return string
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288
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*/
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|
289
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public function getHTMLHeadTag(bool $bPrettyPrint = false) : string
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|
290
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{
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291
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$strTag = '';
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292
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if (!$this->bIsChild) {
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293
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$strTag = '<script type="application/ld+json">' . PHP_EOL;
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294
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$strTag .= json_encode($this->aJsonLD, $bPrettyPrint ? JSON_PRETTY_PRINT : 0) . PHP_EOL;
|
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295
|
|
|
$strTag .= '</script>' . PHP_EOL;
|
|
296
|
|
|
}
|
|
297
|
|
|
return $strTag;
|
|
298
|
|
|
}
|
|
299
|
|
|
|
|
300
|
|
|
/**
|
|
301
|
|
|
* Get the resulting json object.
|
|
302
|
|
|
* @param bool $bPrettyPrint
|
|
303
|
|
|
* @return string
|
|
304
|
|
|
*/
|
|
305
|
|
|
public function getJson(bool $bPrettyPrint = false) : string
|
|
306
|
|
|
{
|
|
307
|
|
|
$strJson = json_encode($this->aJsonLD, $bPrettyPrint ? JSON_PRETTY_PRINT : 0);
|
|
308
|
|
|
if ($strJson === false) {
|
|
309
|
|
|
$strJson = '';
|
|
310
|
|
|
}
|
|
311
|
|
|
return $strJson;
|
|
312
|
|
|
}
|
|
313
|
|
|
|
|
314
|
|
|
/**
|
|
315
|
|
|
* Get the array object.
|
|
316
|
|
|
* @return array<mixed>
|
|
317
|
|
|
*/
|
|
318
|
|
|
public function getObject() : array
|
|
319
|
|
|
{
|
|
320
|
|
|
return $this->aJsonLD;
|
|
321
|
|
|
}
|
|
322
|
|
|
|
|
323
|
|
|
/**
|
|
324
|
|
|
* Build valid string value.
|
|
325
|
|
|
* @param string $str
|
|
326
|
|
|
* @return string
|
|
327
|
|
|
*/
|
|
328
|
|
|
protected function validString(string $str) : string
|
|
329
|
|
|
{
|
|
330
|
|
|
// replace " and all '\r' from string
|
|
331
|
|
|
$str = str_replace('"', "'", $str);
|
|
332
|
|
|
$str = str_replace("\r\n", "\n", $str);
|
|
333
|
|
|
$str = str_replace("\r", "\n", $str);
|
|
334
|
|
|
return $str;
|
|
335
|
|
|
}
|
|
336
|
|
|
|
|
337
|
|
|
/**
|
|
338
|
|
|
* Build valid longitude/latidute value.
|
|
339
|
|
|
* @param float|string $longlat
|
|
340
|
|
|
* @return string
|
|
341
|
|
|
*/
|
|
342
|
|
|
protected function validLongLat($longlat) : string
|
|
343
|
|
|
{
|
|
344
|
|
|
// TODO: long/lat validation
|
|
345
|
|
|
if (is_numeric($longlat)) {
|
|
346
|
|
|
$longlat = (string)$longlat;
|
|
347
|
|
|
}
|
|
348
|
|
|
return $longlat;
|
|
349
|
|
|
}
|
|
350
|
|
|
|
|
351
|
|
|
/**
|
|
352
|
|
|
* Build valid date value.
|
|
353
|
|
|
* If no time set (H,i and s == 0), only 'Y-m-d' format is used, otherwise
|
|
354
|
|
|
* the full ISO8601 format is used.
|
|
355
|
|
|
* @param string|int|\DateTime $date can be string (format YYYY-MM-DD {HH:ii:ss.}), int (unixtimestamp) or DateTime - object
|
|
356
|
|
|
* @return string
|
|
357
|
|
|
*/
|
|
358
|
|
|
protected function validDate($date) : string
|
|
359
|
|
|
{
|
|
360
|
|
|
$strDate = '';
|
|
361
|
|
|
if ($date !== null) {
|
|
362
|
|
|
$uxts = 0;
|
|
363
|
|
|
if (is_object($date) && get_class($date) == 'DateTime') {
|
|
364
|
|
|
// DateTime -object
|
|
365
|
|
|
$uxts = $date->getTimestamp();
|
|
366
|
|
|
} elseif (is_numeric($date)) {
|
|
367
|
|
|
// unix timestamp
|
|
368
|
|
|
$uxts = intval($date);
|
|
369
|
|
|
} elseif (is_string($date)) {
|
|
370
|
|
|
$uxts = strtotime($date);
|
|
371
|
|
|
if ($uxts === false) {
|
|
372
|
|
|
$uxts = 0;
|
|
373
|
|
|
}
|
|
374
|
|
|
}
|
|
375
|
|
|
if ($uxts > 0) {
|
|
376
|
|
|
$strTime = date('H:i:s', $uxts);
|
|
377
|
|
|
if ($strTime == '00:00:00') {
|
|
378
|
|
|
$strDate = date('Y-m-d', $uxts);
|
|
379
|
|
|
} else {
|
|
380
|
|
|
$strDate = date(DATE_ISO8601, $uxts);
|
|
381
|
|
|
}
|
|
382
|
|
|
}
|
|
383
|
|
|
}
|
|
384
|
|
|
return $strDate;
|
|
385
|
|
|
}
|
|
386
|
|
|
|
|
387
|
|
|
/**
|
|
388
|
|
|
* Build valid time value.
|
|
389
|
|
|
* @param string $strTime
|
|
390
|
|
|
* @return string
|
|
391
|
|
|
*/
|
|
392
|
|
|
protected function validTime(string $strTime) : string
|
|
393
|
|
|
{
|
|
394
|
|
|
$aTime = explode(':', $strTime);
|
|
395
|
|
|
$strTime = '';
|
|
396
|
|
|
if (count($aTime) == 2) {
|
|
397
|
|
|
$iHour = intval($aTime[0]);
|
|
398
|
|
|
$iMin = intval($aTime[1]);
|
|
399
|
|
|
if ($iHour >= 0 && $iHour < 24 && $iMin >= 0 && $iMin < 60) {
|
|
400
|
|
|
$strTime = sprintf('%02d:%02d', $iHour, $iMin);
|
|
401
|
|
|
}
|
|
402
|
|
|
}
|
|
403
|
|
|
return $strTime;
|
|
404
|
|
|
}
|
|
405
|
|
|
|
|
406
|
|
|
/**
|
|
407
|
|
|
* Check for valid URL value.
|
|
408
|
|
|
* @param string $strURL
|
|
409
|
|
|
* @return string
|
|
410
|
|
|
*/
|
|
411
|
|
|
protected function validURL(string $strURL) : string
|
|
412
|
|
|
{
|
|
413
|
|
|
$strOrgURL = $strURL;
|
|
414
|
|
|
if (strlen($strURL) > 0 && !($strURL = filter_var($strURL, FILTER_VALIDATE_URL))) {
|
|
415
|
|
|
$strURL = '';
|
|
416
|
|
|
trigger_error('Passed invalid URL: ' . $strOrgURL, E_USER_WARNING);
|
|
417
|
|
|
}
|
|
418
|
|
|
return $strURL;
|
|
419
|
|
|
}
|
|
420
|
|
|
|
|
421
|
|
|
/**
|
|
422
|
|
|
* Check for valid e-Mail adress.
|
|
423
|
|
|
* @param string $strEMail
|
|
424
|
|
|
* @return string
|
|
425
|
|
|
*/
|
|
426
|
|
|
protected function validEMail(string $strEMail) : string
|
|
427
|
|
|
{
|
|
428
|
|
|
$strOrgEMail = $strEMail;
|
|
429
|
|
|
if (strlen($strEMail) > 0 && !($strEMail = filter_var($strEMail, FILTER_VALIDATE_EMAIL))) {
|
|
430
|
|
|
$strEMail = '';
|
|
431
|
|
|
trigger_error('Passed invalid e-Mail: ' . $strOrgEMail, E_USER_WARNING);
|
|
432
|
|
|
}
|
|
433
|
|
|
return $strEMail;
|
|
434
|
|
|
}
|
|
435
|
|
|
|
|
436
|
|
|
/**
|
|
437
|
|
|
* Truncate string to max length and add 'ellipsis' (...) at the end.
|
|
438
|
|
|
* Truncation can be made 'hard' or 'soft' (default). Hard break menas, the text is
|
|
439
|
|
|
* cut off at $iMaxLen-3 characters and '...' appended. In the case of
|
|
440
|
|
|
* a soft break, the text is cut off after the last word that fits within
|
|
441
|
|
|
* the maximum length and the '...' is added.
|
|
442
|
|
|
* @param string $strText
|
|
443
|
|
|
* @param int $iMaxLen
|
|
444
|
|
|
* @param bool $bHardBreak
|
|
445
|
|
|
* @return string
|
|
446
|
|
|
*/
|
|
447
|
|
|
protected function strTruncateEllipsis(string $strText, int $iMaxLen, bool $bHardBreak = false) : string
|
|
448
|
|
|
{
|
|
449
|
|
|
if (strlen($strText) > $iMaxLen - 3 && $iMaxLen > 4) {
|
|
450
|
|
|
$strText = substr($strText, 0, $iMaxLen - 3);
|
|
451
|
|
|
if (strrpos($strText, ' ') !== false && !$bHardBreak) {
|
|
452
|
|
|
$strText = substr($strText, 0, strrpos($strText, ' '));
|
|
453
|
|
|
}
|
|
454
|
|
|
$strText .= '...';
|
|
455
|
|
|
}
|
|
456
|
|
|
return $strText;
|
|
457
|
|
|
}
|
|
458
|
|
|
}
|
|
459
|
|
|
|
Stefanius67 /
JsonLD
