mirror of
https://github.com/RSS-Bridge/rss-bridge.git
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346 lines
11 KiB
PHP
346 lines
11 KiB
PHP
<?php
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class MoinMoinBridge extends BridgeAbstract
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{
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const MAINTAINER = 'logmanoriginal';
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const NAME = 'MoinMoin Bridge';
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const URI = 'https://moinmo.in';
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const DESCRIPTION = 'Generates feeds for pages of a MoinMoin (compatible) wiki';
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const PARAMETERS = [
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[
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'source' => [
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'name' => 'Source',
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'type' => 'text',
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'required' => true,
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'title' => 'Insert wiki page URI (e.g.: https://moinmo.in/MoinMoin)',
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'exampleValue' => 'https://moinmo.in/MoinMoin'
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],
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'separator' => [
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'name' => 'Separator',
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'type' => 'list',
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'requied' => true,
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'title' => 'Defines the separtor for splitting content into feeds',
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'defaultValue' => 'h2',
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'values' => [
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'Header (h1)' => 'h1',
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'Header (h2)' => 'h2',
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'Header (h3)' => 'h3',
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'List element (li)' => 'li',
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'Anchor (a)' => 'a'
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]
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],
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'limit' => [
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'name' => 'Limit',
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'type' => 'number',
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'required' => false,
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'title' => 'Number of items to return (from top)',
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'defaultValue' => -1
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],
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'content' => [
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'name' => 'Content',
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'type' => 'list',
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'required' => false,
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'title' => 'Defines how feed contents are build',
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'defaultValue' => 'separator',
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'values' => [
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'By separator' => 'separator',
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'Follow link (only for anchor)' => 'follow',
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'None' => 'none'
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]
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]
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]
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];
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private $title = '';
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public function collectData()
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{
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/* MoinMoin uses a rather unpleasent representation of HTML. Instead of
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* using tags like <article/>, <navigation/>, <header/>, etc... it uses
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* <div/>, <span/> and <p/>. Also each line is literaly identified via
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* IDs. The only way to distinguish content is via headers, though not
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* in all cases.
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*
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* Example (indented for the sake of readability):
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* ...
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* <span class="anchor" id="line-1"></span>
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* <span class="anchor" id="line-2"></span>
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* <span class="anchor" id="line-3"></span>
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* <span class="anchor" id="line-4"></span>
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* <span class="anchor" id="line-5"></span>
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* <span class="anchor" id="line-6"></span>
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* <span class="anchor" id="line-7"></span>
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* <span class="anchor" id="line-8"></span>
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* <span class="anchor" id="line-9"></span>
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* <p class="line867">MoinMoin is a Wiki software implemented in
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* <a class="interwiki" href="/Python" title="MoinMoin">Python</a>
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* and distributed as Free Software under
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* <a class="interwiki" href="/GPL" title="MoinMoin">GNU GPL license</a>.
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* ...
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*/
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$html = getSimpleHTMLDOM($this->getInput('source'));
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// Some anchors link to local sites or local IDs (both don't work well
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// in feeds)
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$html = $this->fixAnchors($html);
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$this->title = $html->find('title', 0)->innertext . ' | ' . self::NAME;
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// Here we focus on simple author and timestamp information from the given
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// page. Later we update this information in case the anchor is followed.
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$author = $this->findAuthor($html);
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$timestamp = $this->findTimestamp($html);
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$sections = $this->splitSections($html);
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foreach ($sections as $section) {
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$item = [];
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$item['uri'] = $this->findSectionAnchor($section[0]);
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switch ($this->getInput('content')) {
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case 'none': // Do not return any content
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break;
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case 'follow': // Follow the anchor
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// We can only follow anchors (use default otherwise)
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if ($this->getInput('separator') === 'a') {
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$content = $this->followAnchor($item['uri']);
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// Return only actual content
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$item['content'] = $content->find('div#page', 0)->innertext;
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// Each page could have its own author and timestamp
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$author = $this->findAuthor($content);
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$timestamp = $this->findTimestamp($content);
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break;
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}
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// fall-through
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case 'separator':
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default: // Use contents from the current page
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$item['content'] = $this->cleanArticle($section[2]);
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}
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if (!is_null($author)) {
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$item['author'] = $author;
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}
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if (!is_null($timestamp)) {
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$item['timestamp'] = $timestamp;
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}
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$item['title'] = strip_tags($section[1]);
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// Skip items with empty title
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if (empty(trim($item['title']))) {
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continue;
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}
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$this->items[] = $item;
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if (
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$this->getInput('limit') > 0
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&& count($this->items) >= $this->getInput('limit')
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) {
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break;
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}
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}
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}
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public function getName()
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{
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return $this->title ?: parent::getName();
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}
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public function getURI()
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{
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return $this->getInput('source') ?: parent::getURI();
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}
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/**
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* Splits the html into sections.
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*
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* Returns an array with one element per section. Each element consists of:
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* [0] The entire section
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* [1] The section title
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* [2] The section content
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*/
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private function splitSections($html)
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{
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$content = $html->find('div#page', 0)->innertext
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or returnServerError('Unable to find <div id="page"/>!');
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$sections = [];
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$regex = implode(
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'',
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[
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"\<{$this->getInput('separator')}.+?(?=\>)\>",
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"(.+?)(?=\<\/{$this->getInput('separator')}\>)",
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"\<\/{$this->getInput('separator')}\>",
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"(.+?)((?=\<{$this->getInput('separator')})|(?=\<div\sid=\"pagebottom\")){1}"
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]
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);
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preg_match_all(
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'/' . $regex . '/m',
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$content,
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$sections,
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PREG_SET_ORDER
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);
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// Some pages don't use headers, return page as one feed
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if (count($sections) === 0) {
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return [
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[
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$content,
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$html->find('title', 0)->innertext,
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$content
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]
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];
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}
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return $sections;
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}
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/**
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* Returns the anchor for a given section
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*/
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private function findSectionAnchor($section)
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{
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$html = str_get_html($section);
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// For IDs
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$anchor = $html->find($this->getInput('separator') . '[id=]', 0);
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if (!is_null($anchor)) {
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return $this->getInput('source') . '#' . $anchor->id;
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}
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// For actual anchors
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$anchor = $html->find($this->getInput('separator') . '[href=]', 0);
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if (!is_null($anchor)) {
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return $anchor->href;
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}
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// Nothing found
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return $this->getInput('source');
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}
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/**
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* Returns the author
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*
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* Notice: Some pages don't provide author information
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*/
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private function findAuthor($html)
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{
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/* Example:
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* <p id="pageinfo" class="info" dir="ltr" lang="en">MoinMoin: LocalSpellingWords
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* (last edited 2017-02-16 15:36:31 by <span title="??? @ hosted-by.leaseweb.com
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* [178.162.199.143]">hosted-by</span>)</p>
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*/
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$pageinfo = $html->find('[id="pageinfo"]', 0);
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if (is_null($pageinfo)) {
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return null;
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} else {
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$author = $pageinfo->find('[title=]', 0);
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if (is_null($author)) {
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return null;
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} else {
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return trim(explode('@', $author->title)[0]);
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}
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}
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}
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/**
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* Returns the time of last edit
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*
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* Notice: Some pages don't provide this information
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*/
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private function findTimestamp($html)
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{
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// See example of findAuthor()
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$pageinfo = $html->find('[id="pageinfo"]', 0);
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if (is_null($pageinfo)) {
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return null;
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} else {
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$timestamp = $pageinfo->innertext;
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$matches = [];
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preg_match('/.+?(?=\().+?(?=\d)([0-9\-\s\:]+)/m', $pageinfo, $matches);
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return strtotime($matches[1]);
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}
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}
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/**
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* Returns the original HTML with all anchors fixed (makes relative anchors
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* absolute)
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*/
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private function fixAnchors($html, $source = null)
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{
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$source = $source ?: $this->getURI();
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foreach ($html->find('a') as $anchor) {
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switch (substr($anchor->href, 0, 1)) {
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case 'h': // http or https, no actions required
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break;
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case '/': // some relative path
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$anchor->href = $this->findDomain($source) . $anchor->href;
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break;
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case '#': // it's an ID
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default: // probably something like ? or &, skip empty ones
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if (!isset($anchor->href)) {
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break;
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}
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$anchor->href = $source . $anchor->href;
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}
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}
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return $html;
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}
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/**
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* Loads the full article of a given anchor (if the anchor is from the same
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* wiki domain)
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*/
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private function followAnchor($anchor)
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{
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if (strrpos($anchor, $this->findDomain($this->getInput('source')) === false)) {
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return null;
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}
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$html = getSimpleHTMLDOMCached($anchor);
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if (!$html) { // Cannot load article
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return null;
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}
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return $this->fixAnchors($html, $anchor);
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}
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/**
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* Finds the domain for a given URI
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*/
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private function findDomain($uri)
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{
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$matches = [];
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preg_match('/(http[s]{0,1}:\/\/.+?(?=\/))/', $uri, $matches);
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return $matches[1];
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}
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/* This function is a copy from CNETBridge */
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private function stripWithDelimiters($string, $start, $end)
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{
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while (strpos($string, $start) !== false) {
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$section_to_remove = substr($string, strpos($string, $start));
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$section_to_remove = substr($section_to_remove, 0, strpos($section_to_remove, $end) + strlen($end));
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$string = str_replace($section_to_remove, '', $string);
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}
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return $string;
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}
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/* This function is based on CNETBridge */
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private function cleanArticle($article_html)
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{
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$article_html = $this->stripWithDelimiters($article_html, '<script', '</script>');
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return $article_html;
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}
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}
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