lax/lib/Parser/XML/Entry.php

<?php
/** @license MIT
 * Copyright 2018 J. King et al.
 * See LICENSE and AUTHORS files for details */

declare(strict_types=1);
namespace MensBeam\Lax\Parser\XML;

use MensBeam\Lax\Feed as FeedStruct;
use MensBeam\Lax\Entry as EntryStruct;
use MensBeam\Lax\Person\Collection as PersonCollection;
use MensBeam\Lax\Category\Collection as CategoryCollection;
use MensBeam\Lax\Enclosure\Collection as EnclosureCollection;
use MensBeam\Lax\Date;
use MensBeam\Lax\Text;
use MensBeam\Lax\Url;

class Entry extends Construct implements \MensBeam\Lax\Parser\Entry {
    public function __construct(\DOMElement $data, XPath $xpath, FeedStruct $feed) {
        $this->subject = $data;
        $this->xpath = $xpath;
        $this->feed = $feed;
    }

    public function parse(EntryStruct $entry = null): EntryStruct {
        $entry = $entry ?? new EntryStruct;
        $entry->lang = $this->getLang();
        $entry->id = $this->getId();
        $entry->link = $this->getLink();
        $entry->relatedLink = $this->getRelatedLink();
        $entry->title = $this->getTitle();
        $entry->dateModified = $this->getDateModified();
        $entry->dateCreated = $this->getDateCreated();
        $entry->content = $this->getContent();
        $entry->summary = $this->getSummary();
        $entry->banner = $this->getBanner();
        $entry->people = $this->getPeople();
        $entry->categories = $this->getCategories();
        $entry->enclosures = $this->getEnclosures();
        return $entry;
    }

    public function getLang(): ?string {
        return $this->getLangXML()      // xml:lang attribute
            ?? $this->getLangDC()       // Dublin Core language
            ?? $this->getLangRss2();    // RSS language
    }

    public function getId(): ?string {
        return $this->fetchString("atom:id", ".+")          // Item identifier
            ?? $this->fetchString("dc:identifier", ".+")    // Dublin Core identifier
            ?? $this->fetchString("rss2:guid", ".+");       // RSS 2.0 GUID
    }

    public function getLink(): ?Url {
        return $this->getLinkAtom()     // Atom link
            ?? $this->getLinkRss1()     // RSS 0.90 or RSS 1.0 link
            ?? $this->getLinkRss2();    // RSS 2.0 link
    }

    public function getRelatedLink(): ?Url {
        return $this->fetchAtomRelation("related", ["text/html", "application/xhtml+xml"]);
    }

    public function getTitle(): ?Text {
        return $this->getTitleAtom()    // Atom title
            ?? $this->getTitleRss1()    // RSS 0.90 or RSS 1.0 title
            ?? $this->getTitleRss2()    // RSS 2.0 title
            ?? $this->getTitleDC()      // Dublin Core title
            ?? $this->getTitlePod();    // iTunes podcast title
    }

    public function getDateModified(): ?Date {
        return null;
    }

    public function getDateCreated(): ?Date {
        return null;
    }

    public function getContent(): ?Text {
        return null;
    }

    public function getSummary(): ?Text {
        return null;
    }

    public function getBanner(): ?Url {
        return null;
    }

    public function getPeople(): PersonCollection {
        return new PersonCollection;
    }

    public function getCategories(): CategoryCollection {
        return new CategoryCollection;
    }

    public function getEnclosures(): EnclosureCollection {
        return new EnclosureCollection;
    }
}