forked from mirror/pixelfed
367 lines
11 KiB
PHP
Executable file
367 lines
11 KiB
PHP
Executable file
<?php
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/**
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* @author Mike Cochrane <mikec@mikenz.geek.nz>
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* @author Nick Pope <nick@nickpope.me.uk>
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* @author Takashi Nojima
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* @copyright Copyright 2014 Mike Cochrane, Nick Pope, Takashi Nojima
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* @license http://www.apache.org/licenses/LICENSE-2.0 Apache License v2.0
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*/
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namespace App\Util\Lexer;
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/**
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* Twitter LooseAutolink Class.
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*
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* Parses tweets and generates HTML anchor tags around URLs, usernames,
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* username/list pairs and hashtags.
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*
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* Originally written by {@link http://github.com/mikenz Mike Cochrane}, this
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* is based on code by {@link http://github.com/mzsanford Matt Sanford} and
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* heavily modified by {@link http://github.com/ngnpope Nick Pope}.
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*
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* @author Mike Cochrane <mikec@mikenz.geek.nz>
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* @author Nick Pope <nick@nickpope.me.uk>
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* @author Takashi Nojima
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* @copyright Copyright 2014 Mike Cochrane, Nick Pope, Takashi Nojima
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* @license http://www.apache.org/licenses/LICENSE-2.0 Apache License v2.0
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*
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* @since 1.8.0
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* @deprecated since version 1.9.0
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*/
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class LooseAutolink extends Autolink
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{
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/**
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* Auto-link hashtags, URLs, usernames and lists.
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*
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* @param string The tweet to be converted
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*
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* @return string that auto-link HTML added
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*
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* @deprecated since version 1.9.0
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*/
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public function autoLink($tweet = null)
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{
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if (!is_null($tweet)) {
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$this->tweet = $tweet;
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}
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return $this->addLinks();
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}
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/**
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* Auto-link the @username and @username/list references in the provided text. Links to @username references will
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* have the usernameClass CSS classes added. Links to @username/list references will have the listClass CSS class
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* added.
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*
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* @return string that auto-link HTML added
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*/
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public function autoLinkUsernamesAndLists($tweet = null)
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{
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if (!is_null($tweet)) {
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$this->tweet = $tweet;
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}
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return $this->addLinksToUsernamesAndLists();
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}
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/**
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* Auto-link #hashtag references in the provided Tweet text. The #hashtag links will have the hashtagClass CSS class
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* added.
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*
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* @return string that auto-link HTML added
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*/
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public function autoLinkHashtags($tweet = null)
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{
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if (!is_null($tweet)) {
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$this->tweet = $tweet;
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}
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return $this->addLinksToHashtags();
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}
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/**
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* Auto-link URLs in the Tweet text provided.
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* <p/>
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* This only auto-links URLs with protocol.
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*
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* @return string that auto-link HTML added
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*/
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public function autoLinkURLs($tweet = null)
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{
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if (!is_null($tweet)) {
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$this->tweet = $tweet;
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}
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return $this->addLinksToURLs();
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}
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/**
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* Auto-link $cashtag references in the provided Tweet text. The $cashtag links will have the cashtagClass CSS class
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* added.
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*
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* @return string that auto-link HTML added
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*/
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public function autoLinkCashtags($tweet = null)
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{
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if (!is_null($tweet)) {
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$this->tweet = $tweet;
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}
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return $this->addLinksToCashtags();
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}
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/**
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* Adds links to all elements in the tweet.
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*
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* @return string The modified tweet.
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*
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* @deprecated since version 1.9.0
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*/
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public function addLinks()
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{
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$original = $this->tweet;
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$this->tweet = $this->addLinksToURLs();
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$this->tweet = $this->addLinksToHashtags();
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$this->tweet = $this->addLinksToCashtags();
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$this->tweet = $this->addLinksToUsernamesAndLists();
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$modified = $this->tweet;
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$this->tweet = $original;
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return $modified;
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}
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/**
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* Adds links to hashtag elements in the tweet.
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*
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* @return string The modified tweet.
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*/
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public function addLinksToHashtags()
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{
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return preg_replace_callback(
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self::$patterns['valid_hashtag'],
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[$this, '_addLinksToHashtags'],
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$this->tweet
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);
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}
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/**
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* Adds links to cashtag elements in the tweet.
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*
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* @return string The modified tweet.
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*/
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public function addLinksToCashtags()
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{
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return preg_replace_callback(
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self::$patterns['valid_cashtag'],
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[$this, '_addLinksToCashtags'],
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$this->tweet
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);
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}
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/**
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* Adds links to URL elements in the tweet.
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*
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* @return string The modified tweet
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*/
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public function addLinksToURLs()
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{
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return preg_replace_callback(self::$patterns['valid_url'], [$this, '_addLinksToURLs'], $this->tweet);
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}
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/**
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* Adds links to username/list elements in the tweet.
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*
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* @return string The modified tweet.
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*/
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public function addLinksToUsernamesAndLists()
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{
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return preg_replace_callback(
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self::$patterns['valid_mentions_or_lists'],
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[$this, '_addLinksToUsernamesAndLists'],
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$this->tweet
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);
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}
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/**
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* Wraps a tweet element in an HTML anchor tag using the provided URL.
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*
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* This is a helper function to perform the generation of the link.
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*
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* @param string $url The URL to use as the href.
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* @param string $class The CSS class(es) to apply (space separated).
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* @param string $element The tweet element to wrap.
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*
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* @return string The tweet element with a link applied.
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*
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* @deprecated since version 1.1.0
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*/
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protected function wrap($url, $class, $element)
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{
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$link = '<a';
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if ($class) {
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$link .= ' class="'.$class.'"';
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}
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$link .= ' href="'.$url.'"';
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$rel = [];
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if ($this->external) {
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$rel[] = 'external';
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}
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if ($this->nofollow) {
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$rel[] = 'nofollow';
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}
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if (!empty($rel)) {
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$link .= ' rel="'.implode(' ', $rel).'"';
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}
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if ($this->target) {
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$link .= ' target="'.$this->target.'"';
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}
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$link .= '>'.$element.'</a>';
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return $link;
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}
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/**
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* Wraps a tweet element in an HTML anchor tag using the provided URL.
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*
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* This is a helper function to perform the generation of the hashtag link.
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*
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* @param string $url The URL to use as the href.
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* @param string $class The CSS class(es) to apply (space separated).
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* @param string $element The tweet element to wrap.
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*
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* @return string The tweet element with a link applied.
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*/
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protected function wrapHash($url, $class, $element)
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{
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$title = preg_replace('/＃/u', '#', $element);
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$link = '<a';
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$link .= ' href="'.$url.'"';
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$link .= ' title="'.$title.'"';
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if ($class) {
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$link .= ' class="'.$class.'"';
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}
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$rel = [];
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if ($this->external) {
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$rel[] = 'external';
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}
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if ($this->nofollow) {
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$rel[] = 'nofollow';
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}
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if (!empty($rel)) {
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$link .= ' rel="'.implode(' ', $rel).'"';
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}
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if ($this->target) {
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$link .= ' target="'.$this->target.'"';
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}
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$link .= '>'.$element.'</a>';
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return $link;
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}
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/**
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* Callback used by the method that adds links to hashtags.
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*
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* @see addLinksToHashtags()
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*
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* @param array $matches The regular expression matches.
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*
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* @return string The link-wrapped hashtag.
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*/
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protected function _addLinksToHashtags($matches)
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{
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list($all, $before, $hash, $tag, $after) = array_pad($matches, 5, '');
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if (preg_match(self::$patterns['end_hashtag_match'], $after)
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|| (!preg_match('!\A["\']!', $before) && preg_match('!\A["\']!', $after)) || preg_match('!\A</!', $after)) {
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return $all;
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}
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$replacement = $before;
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$element = $hash.$tag;
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$url = $this->url_base_hash.$tag;
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$class_hash = $this->class_hash;
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if (preg_match(self::$patterns['rtl_chars'], $element)) {
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$class_hash .= ' rtl';
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}
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$replacement .= $this->wrapHash($url, $class_hash, $element);
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return $replacement;
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}
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/**
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* Callback used by the method that adds links to cashtags.
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*
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* @see addLinksToCashtags()
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*
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* @param array $matches The regular expression matches.
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*
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* @return string The link-wrapped cashtag.
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*/
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protected function _addLinksToCashtags($matches)
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{
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list($all, $before, $cash, $tag, $after) = array_pad($matches, 5, '');
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if (preg_match(self::$patterns['end_cashtag_match'], $after)
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|| (!preg_match('!\A["\']!', $before) && preg_match('!\A["\']!', $after)) || preg_match('!\A</!', $after)) {
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return $all;
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}
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$replacement = $before;
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$element = $cash.$tag;
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$url = $this->url_base_cash.$tag;
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$replacement .= $this->wrapHash($url, $this->class_cash, $element);
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return $replacement;
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}
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/**
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* Callback used by the method that adds links to URLs.
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*
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* @see addLinksToURLs()
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*
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* @param array $matches The regular expression matches.
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*
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* @return string The link-wrapped URL.
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*/
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protected function _addLinksToURLs($matches)
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{
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list($all, $before, $url, $protocol, $domain, $path, $query) = array_pad($matches, 7, '');
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$url = htmlspecialchars($url, ENT_QUOTES, 'UTF-8', false);
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if (!$protocol) {
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return $all;
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}
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return $before.$this->wrap($url, $this->class_url, $url);
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}
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/**
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* Callback used by the method that adds links to username/list pairs.
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*
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* @see addLinksToUsernamesAndLists()
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*
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* @param array $matches The regular expression matches.
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*
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* @return string The link-wrapped username/list pair.
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*/
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protected function _addLinksToUsernamesAndLists($matches)
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{
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list($all, $before, $at, $username, $slash_listname, $after) = array_pad($matches, 6, '');
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// If $after is not empty, there is an invalid character.
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if (!empty($slash_listname)) {
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// Replace the list and username
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$element = $username.$slash_listname;
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$class = $this->class_list;
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$url = $this->url_base_list.$element;
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} else {
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if (preg_match(self::$patterns['end_mention_match'], $after)) {
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return $all;
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}
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// Replace the username
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$element = $username;
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$class = $this->class_user;
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$url = $this->url_base_user.$element;
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}
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// XXX: Due to use of preg_replace_callback() for multiple replacements in a
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// single tweet and also as only the match is replaced and we have to
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// use a look-ahead for $after because there is no equivalent for the
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// $' (dollar apostrophe) global from Ruby, we MUST NOT append $after.
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return $before.$at.$this->wrap($url, $class, $element);
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}
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}
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