123 lines
3.0 KiB
PHP
123 lines
3.0 KiB
PHP
<?php
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namespace PicoFeed\Serialization;
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use SimpleXMLElement;
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/**
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* OPML export class.
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*
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* @author Frederic Guillot
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*/
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class Export
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{
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/**
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* List of feeds to exports.
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*
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* @var array
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*/
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private $content = array();
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/**
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* List of required properties for each feed.
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*
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* @var array
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*/
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private $required_fields = array(
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'title',
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'site_url',
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'feed_url',
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);
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/**
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* Constructor.
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*
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* @param array $content List of feeds
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*/
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public function __construct(array $content)
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{
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$this->content = $content;
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}
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/**
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* Get the OPML document.
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*
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* @return string
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*/
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public function execute()
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{
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$xml = new SimpleXMLElement('<?xml version="1.0" encoding="utf-8"?><opml/>');
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$head = $xml->addChild('head');
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$head->addChild('title', 'OPML Export');
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$body = $xml->addChild('body');
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foreach ($this->content as $category => $values) {
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if (is_string($category)) {
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$this->createCategory($body, $category, $values);
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} else {
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$this->createEntry($body, $values);
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}
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}
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return $xml->asXML();
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}
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/**
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* Create a feed entry.
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*
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* @param SimpleXMLElement $parent Parent Element
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* @param array $feed Feed properties
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*/
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public function createEntry(SimpleXMLElement $parent, array $feed)
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{
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$valid = true;
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foreach ($this->required_fields as $field) {
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if (!isset($feed[$field])) {
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$valid = false;
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break;
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}
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}
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if ($valid) {
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$outline = $parent->addChild('outline');
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$outline->addAttribute('xmlUrl', $feed['feed_url']);
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$outline->addAttribute('htmlUrl', $feed['site_url']);
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$outline->addAttribute('title', $feed['title']);
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$outline->addAttribute('text', $feed['title']);
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$outline->addAttribute('description', isset($feed['description']) ? $feed['description'] : $feed['title']);
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$outline->addAttribute('type', 'rss');
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$outline->addAttribute('version', 'RSS');
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}
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}
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/**
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* Create entries for a feed list.
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*
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* @param SimpleXMLElement $parent Parent Element
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* @param array $feeds Feed list
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*/
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public function createEntries(SimpleXMLElement $parent, array $feeds)
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{
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foreach ($feeds as $feed) {
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$this->createEntry($parent, $feed);
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}
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}
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/**
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* Create a category entry.
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*
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* @param SimpleXMLElement $parent Parent Element
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* @param string $category Category
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* @param array $feeds Feed properties
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*/
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public function createCategory(SimpleXMLElement $parent, $category, array $feeds)
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{
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$outline = $parent->addChild('outline');
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$outline->addAttribute('text', $category);
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$this->createEntries($outline, $feeds);
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}
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}
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