forked from mirror/pixelfed
796 lines
24 KiB
PHP
Executable file
796 lines
24 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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* @copyright Copyright © 2010, Mike Cochrane, Nick Pope
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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 Autolink 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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* @copyright Copyright © 2010, Mike Cochrane, Nick Pope
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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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class Autolink extends Regex
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{
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/**
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* CSS class for auto-linked URLs.
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*
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* @var string
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*/
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protected $class_url = '';
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/**
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* CSS class for auto-linked username URLs.
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*
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* @var string
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*/
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protected $class_user = 'u-url mention';
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/**
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* CSS class for auto-linked list URLs.
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*
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* @var string
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*/
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protected $class_list = 'u-url list-slug';
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/**
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* CSS class for auto-linked hashtag URLs.
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*
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* @var string
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*/
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protected $class_hash = 'u-url hashtag';
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/**
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* CSS class for auto-linked cashtag URLs.
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*
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* @var string
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*/
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protected $class_cash = 'u-url cashtag';
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/**
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* URL base for username links (the username without the @ will be appended).
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*
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* @var string
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*/
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protected $url_base_user = null;
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/**
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* URL base for list links (the username/list without the @ will be appended).
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*
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* @var string
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*/
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protected $url_base_list = null;
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/**
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* URL base for hashtag links (the hashtag without the # will be appended).
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*
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* @var string
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*/
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protected $url_base_hash = null;
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/**
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* URL base for cashtag links (the hashtag without the $ will be appended).
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*
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* @var string
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*/
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protected $url_base_cash = null;
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/**
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* Whether to include the value 'nofollow' in the 'rel' attribute.
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*
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* @var bool
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*/
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protected $nofollow = true;
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/**
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* Whether to include the value 'noopener' in the 'rel' attribute.
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*
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* @var bool
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*/
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protected $noopener = true;
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/**
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* Whether to include the value 'external' in the 'rel' attribute.
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*
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* Often this is used to be matched on in JavaScript for dynamically adding
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* the 'target' attribute which is deprecated in HTML 4.01. In HTML 5 it has
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* been undeprecated and thus the 'target' attribute can be used. If this is
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* set to false then the 'target' attribute will be output.
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*
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* @var bool
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*/
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protected $external = true;
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/**
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* The scope to open the link in.
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*
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* Support for the 'target' attribute was deprecated in HTML 4.01 but has
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* since been reinstated in HTML 5. To output the 'target' attribute you
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* must disable the adding of the string 'external' to the 'rel' attribute.
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*
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* @var string
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*/
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protected $target = '_blank';
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/**
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* attribute for invisible span tag.
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*
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* @var string
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*/
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protected $invisibleTagAttrs = "style='position:absolute;left:-9999px;'";
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/**
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* @var Extractor
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*/
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protected $extractor = null;
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/**
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* Provides fluent method chaining.
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*
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* @param string $tweet The tweet to be converted.
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* @param bool $full_encode Whether to encode all special characters.
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*
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* @see __construct()
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*
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* @return Autolink
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*/
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public static function create($tweet = null, $full_encode = false)
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{
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return new static($tweet, $full_encode);
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}
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/**
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* Reads in a tweet to be parsed and converted to contain links.
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*
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* As the intent is to produce links and output the modified tweet to the
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* user, we take this opportunity to ensure that we escape user input.
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*
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* @see htmlspecialchars()
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*
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* @param string $tweet The tweet to be converted.
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* @param bool $escape Whether to escape the tweet (default: true).
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* @param bool $full_encode Whether to encode all special characters.
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*/
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public function __construct($tweet = null, $escape = true, $full_encode = false)
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{
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if ($escape && !empty($tweet)) {
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if ($full_encode) {
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parent::__construct(htmlentities($tweet, ENT_QUOTES, 'UTF-8', false));
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} else {
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parent::__construct(htmlspecialchars($tweet, ENT_QUOTES, 'UTF-8', false));
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}
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} else {
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parent::__construct($tweet);
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}
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$this->extractor = Extractor::create();
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$this->url_base_user = config('app.url').'/';
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$this->url_base_list = config('app.url').'/';
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$this->url_base_hash = config('app.url').'/discover/tags/';
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$this->url_base_cash = config('app.url').'/search?q=%24';
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}
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/**
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* CSS class for auto-linked URLs.
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*
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* @return string CSS class for URL links.
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*/
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public function getURLClass()
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{
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return $this->class_url;
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}
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/**
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* CSS class for auto-linked URLs.
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*
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* @param string $v CSS class for URL links.
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*
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* @return Autolink Fluid method chaining.
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*/
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public function setURLClass($v)
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{
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$this->class_url = trim($v);
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return $this;
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}
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/**
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* CSS class for auto-linked username URLs.
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*
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* @return string CSS class for username links.
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*/
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public function getUsernameClass()
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{
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return $this->class_user;
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}
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/**
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* CSS class for auto-linked username URLs.
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*
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* @param string $v CSS class for username links.
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*
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* @return Autolink Fluid method chaining.
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*/
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public function setUsernameClass($v)
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{
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$this->class_user = trim($v);
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return $this;
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}
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/**
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* CSS class for auto-linked username/list URLs.
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*
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* @return string CSS class for username/list links.
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*/
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public function getListClass()
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{
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return $this->class_list;
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}
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/**
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* CSS class for auto-linked username/list URLs.
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*
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* @param string $v CSS class for username/list links.
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*
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* @return Autolink Fluid method chaining.
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*/
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public function setListClass($v)
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{
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$this->class_list = trim($v);
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return $this;
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}
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/**
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* CSS class for auto-linked hashtag URLs.
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*
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* @return string CSS class for hashtag links.
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*/
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public function getHashtagClass()
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{
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return $this->class_hash;
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}
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/**
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* CSS class for auto-linked hashtag URLs.
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*
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* @param string $v CSS class for hashtag links.
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*
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* @return Autolink Fluid method chaining.
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*/
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public function setHashtagClass($v)
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{
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$this->class_hash = trim($v);
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return $this;
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}
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/**
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* CSS class for auto-linked cashtag URLs.
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*
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* @return string CSS class for cashtag links.
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*/
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public function getCashtagClass()
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{
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return $this->class_cash;
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}
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/**
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* CSS class for auto-linked cashtag URLs.
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*
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* @param string $v CSS class for cashtag links.
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*
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* @return Autolink Fluid method chaining.
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*/
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public function setCashtagClass($v)
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{
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$this->class_cash = trim($v);
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return $this;
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}
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/**
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* Whether to include the value 'nofollow' in the 'rel' attribute.
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*
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* @return bool Whether to add 'nofollow' to the 'rel' attribute.
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*/
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public function getNoFollow()
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{
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return $this->nofollow;
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}
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/**
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* Whether to include the value 'nofollow' in the 'rel' attribute.
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*
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* @param bool $v The value to add to the 'target' attribute.
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*
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* @return Autolink Fluid method chaining.
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*/
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public function setNoFollow($v)
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{
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$this->nofollow = $v;
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return $this;
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}
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/**
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* Whether to include the value 'external' in the 'rel' attribute.
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*
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* Often this is used to be matched on in JavaScript for dynamically adding
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* the 'target' attribute which is deprecated in HTML 4.01. In HTML 5 it has
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* been undeprecated and thus the 'target' attribute can be used. If this is
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* set to false then the 'target' attribute will be output.
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*
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* @return bool Whether to add 'external' to the 'rel' attribute.
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*/
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public function getExternal()
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{
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return $this->external;
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}
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/**
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* Whether to include the value 'external' in the 'rel' attribute.
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*
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* Often this is used to be matched on in JavaScript for dynamically adding
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* the 'target' attribute which is deprecated in HTML 4.01. In HTML 5 it has
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* been undeprecated and thus the 'target' attribute can be used. If this is
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* set to false then the 'target' attribute will be output.
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*
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* @param bool $v The value to add to the 'target' attribute.
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*
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* @return Autolink Fluid method chaining.
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*/
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public function setExternal($v)
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{
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$this->external = $v;
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return $this;
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}
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/**
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* The scope to open the link in.
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*
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* Support for the 'target' attribute was deprecated in HTML 4.01 but has
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* since been reinstated in HTML 5. To output the 'target' attribute you
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* must disable the adding of the string 'external' to the 'rel' attribute.
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*
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* @return string The value to add to the 'target' attribute.
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*/
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public function getTarget()
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{
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return $this->target;
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}
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/**
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* The scope to open the link in.
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*
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* Support for the 'target' attribute was deprecated in HTML 4.01 but has
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* since been reinstated in HTML 5. To output the 'target' attribute you
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* must disable the adding of the string 'external' to the 'rel' attribute.
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*
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* @param string $v The value to add to the 'target' attribute.
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*
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* @return Autolink Fluid method chaining.
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*/
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public function setTarget($v)
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{
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$this->target = trim($v);
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return $this;
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}
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/**
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* Autolink with entities.
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*
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* @param string $tweet
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* @param array $entities
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*
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* @return string
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*
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* @since 1.1.0
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*/
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public function autoLinkEntities($tweet = null, $entities = null)
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{
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if (is_null($tweet)) {
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$tweet = $this->tweet;
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}
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$text = '';
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$beginIndex = 0;
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foreach ($entities as $entity) {
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if (isset($entity['screen_name'])) {
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$text .= StringUtils::substr($tweet, $beginIndex, $entity['indices'][0] - $beginIndex + 1);
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} else {
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$text .= StringUtils::substr($tweet, $beginIndex, $entity['indices'][0] - $beginIndex);
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}
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if (isset($entity['url'])) {
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$text .= $this->linkToUrl($entity);
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} elseif (isset($entity['hashtag'])) {
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$text .= $this->linkToHashtag($entity, $tweet);
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} elseif (isset($entity['screen_name'])) {
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$text .= $this->linkToMentionAndList($entity);
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} elseif (isset($entity['cashtag'])) {
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$text .= $this->linkToCashtag($entity, $tweet);
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}
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$beginIndex = $entity['indices'][1];
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}
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$text .= StringUtils::substr($tweet, $beginIndex, StringUtils::strlen($tweet));
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return $text;
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}
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/**
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* Auto-link hashtags, URLs, usernames and lists, with JSON entities.
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*
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* @param string The tweet to be converted
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* @param mixed The entities info
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*
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* @return string that auto-link HTML added
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*
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* @since 1.1.0
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*/
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public function autoLinkWithJson($tweet = null, $json = null)
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{
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// concatenate entities
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$entities = [];
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if (is_object($json)) {
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$json = $this->object2array($json);
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}
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if (is_array($json)) {
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foreach ($json as $key => $vals) {
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$entities = array_merge($entities, $json[$key]);
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}
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}
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// map JSON entity to twitter-text entity
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foreach ($entities as $idx => $entity) {
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if (!empty($entity['text'])) {
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$entities[$idx]['hashtag'] = $entity['text'];
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}
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}
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$entities = $this->extractor->removeOverlappingEntities($entities);
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return $this->autoLinkEntities($tweet, $entities);
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}
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/**
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* convert Object to Array.
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*
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* @param mixed $obj
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*
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* @return array
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*/
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protected function object2array($obj)
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{
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$array = (array) $obj;
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foreach ($array as $key => $var) {
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if (is_object($var) || is_array($var)) {
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$array[$key] = $this->object2array($var);
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}
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}
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return $array;
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}
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/**
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* Auto-link hashtags, URLs, usernames and lists.
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*
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* @param string The tweet to be converted
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*
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* @return string that auto-link HTML added
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*
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* @since 1.1.0
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*/
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public function autoLink($tweet = null)
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{
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if (is_null($tweet)) {
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$tweet = $this->tweet;
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}
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$entities = $this->extractor->extractURLWithoutProtocol(false)->extractEntitiesWithIndices($tweet);
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return $this->autoLinkEntities($tweet, $entities);
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}
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/**
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* Auto-link the @username and @username/list references in the provided text. Links to @username references will
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* have the usernameClass CSS classes added. Links to @username/list references will have the listClass CSS class
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* added.
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*
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* @return string that auto-link HTML added
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*
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* @since 1.1.0
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*/
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public function autoLinkUsernamesAndLists($tweet = null)
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{
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if (is_null($tweet)) {
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$tweet = $this->tweet;
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}
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$entities = $this->extractor->extractMentionsOrListsWithIndices($tweet);
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return $this->autoLinkEntities($tweet, $entities);
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}
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/**
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* Auto-link #hashtag references in the provided Tweet text. The #hashtag links will have the hashtagClass CSS class
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* added.
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*
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* @return string that auto-link HTML added
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*
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* @since 1.1.0
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*/
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public function autoLinkHashtags($tweet = null)
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{
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if (is_null($tweet)) {
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$tweet = $this->tweet;
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}
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$entities = $this->extractor->extractHashtagsWithIndices($tweet);
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return $this->autoLinkEntities($tweet, $entities);
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}
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/**
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* Auto-link URLs in the Tweet text provided.
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* <p/>
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* This only auto-links URLs with protocol.
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*
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* @return string that auto-link HTML added
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*
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* @since 1.1.0
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*/
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public function autoLinkURLs($tweet = null)
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{
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if (is_null($tweet)) {
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$tweet = $this->tweet;
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}
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$entities = $this->extractor->extractURLWithoutProtocol(false)->extractURLsWithIndices($tweet);
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return $this->autoLinkEntities($tweet, $entities);
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}
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/**
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* Auto-link $cashtag references in the provided Tweet text. The $cashtag links will have the cashtagClass CSS class
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* added.
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*
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* @return string that auto-link HTML added
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*
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* @since 1.1.0
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*/
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public function autoLinkCashtags($tweet = null)
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{
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if (is_null($tweet)) {
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$tweet = $this->tweet;
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}
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$entities = $this->extractor->extractCashtagsWithIndices($tweet);
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return $this->autoLinkEntities($tweet, $entities);
|
|
}
|
|
|
|
public function linkToUrl($entity)
|
|
{
|
|
if (!empty($this->class_url)) {
|
|
$attributes['class'] = $this->class_url;
|
|
}
|
|
$attributes['href'] = $entity['url'];
|
|
$linkText = $this->escapeHTML($entity['url']);
|
|
|
|
if (!empty($entity['display_url']) && !empty($entity['expanded_url'])) {
|
|
// Goal: If a user copies and pastes a tweet containing t.co'ed link, the resulting paste
|
|
// should contain the full original URL (expanded_url), not the display URL.
|
|
//
|
|
// Method: Whenever possible, we actually emit HTML that contains expanded_url, and use
|
|
// font-size:0 to hide those parts that should not be displayed (because they are not part of display_url).
|
|
// Elements with font-size:0 get copied even though they are not visible.
|
|
// Note that display:none doesn't work here. Elements with display:none don't get copied.
|
|
//
|
|
// Additionally, we want to *display* ellipses, but we don't want them copied. To make this happen we
|
|
// wrap the ellipses in a tco-ellipsis class and provide an onCopy handler that sets display:none on
|
|
// everything with the tco-ellipsis class.
|
|
//
|
|
// As an example: The user tweets "hi http://longdomainname.com/foo"
|
|
// This gets shortened to "hi http://t.co/xyzabc", with display_url = "…nname.com/foo"
|
|
// This will get rendered as:
|
|
// <span class='tco-ellipsis'> <!-- This stuff should get displayed but not copied -->
|
|
// …
|
|
// <!-- There's a chance the onCopy event handler might not fire. In case that happens,
|
|
// we include an here so that the … doesn't bump up against the URL and ruin it.
|
|
// The is inside the tco-ellipsis span so that when the onCopy handler *does*
|
|
// fire, it doesn't get copied. Otherwise the copied text would have two spaces in a row,
|
|
// e.g. "hi http://longdomainname.com/foo".
|
|
// <span style='font-size:0'> </span>
|
|
// </span>
|
|
// <span style='font-size:0'> <!-- This stuff should get copied but not displayed -->
|
|
// http://longdomai
|
|
// </span>
|
|
// <span class='js-display-url'> <!-- This stuff should get displayed *and* copied -->
|
|
// nname.com/foo
|
|
// </span>
|
|
// <span class='tco-ellipsis'> <!-- This stuff should get displayed but not copied -->
|
|
// <span style='font-size:0'> </span>
|
|
// …
|
|
// </span>
|
|
//
|
|
// Exception: pic.socialhub.dev images, for which expandedUrl = "https://socialhub.dev/#!/username/status/1234/photo/1
|
|
// For those URLs, display_url is not a substring of expanded_url, so we don't do anything special to render the elided parts.
|
|
// For a pic.socialhub.dev URL, the only elided part will be the "https://", so this is fine.
|
|
$displayURL = $entity['display_url'];
|
|
$expandedURL = $entity['expanded_url'];
|
|
$displayURLSansEllipses = preg_replace('/…/u', '', $displayURL);
|
|
$diplayURLIndexInExpandedURL = mb_strpos($expandedURL, $displayURLSansEllipses);
|
|
|
|
if ($diplayURLIndexInExpandedURL !== false) {
|
|
$beforeDisplayURL = mb_substr($expandedURL, 0, $diplayURLIndexInExpandedURL);
|
|
$afterDisplayURL = mb_substr($expandedURL, $diplayURLIndexInExpandedURL + mb_strlen($displayURLSansEllipses));
|
|
$precedingEllipsis = (preg_match('/\A…/u', $displayURL)) ? '…' : '';
|
|
$followingEllipsis = (preg_match('/…\z/u', $displayURL)) ? '…' : '';
|
|
|
|
$invisibleSpan = "<span {$this->invisibleTagAttrs}>";
|
|
|
|
$linkText = "<span class='tco-ellipsis'>{$precedingEllipsis}{$invisibleSpan} </span></span>";
|
|
$linkText .= "{$invisibleSpan}{$this->escapeHTML($beforeDisplayURL)}</span>";
|
|
$linkText .= "<span class='js-display-url'>{$this->escapeHTML($displayURLSansEllipses)}</span>";
|
|
$linkText .= "{$invisibleSpan}{$this->escapeHTML($afterDisplayURL)}</span>";
|
|
$linkText .= "<span class='tco-ellipsis'>{$invisibleSpan} </span>{$followingEllipsis}</span>";
|
|
} else {
|
|
$linkText = $entity['display_url'];
|
|
}
|
|
$attributes['title'] = $entity['expanded_url'];
|
|
} elseif (!empty($entity['display_url'])) {
|
|
$linkText = $entity['display_url'];
|
|
}
|
|
|
|
return $this->linkToText($entity, $linkText, $attributes);
|
|
}
|
|
|
|
/**
|
|
* @param array $entity
|
|
* @param string $tweet
|
|
*
|
|
* @return string
|
|
*
|
|
* @since 1.1.0
|
|
*/
|
|
public function linkToHashtag($entity, $tweet = null)
|
|
{
|
|
if (is_null($tweet)) {
|
|
$tweet = $this->tweet;
|
|
}
|
|
$this->target = false;
|
|
$attributes = [];
|
|
$class = [];
|
|
$hash = StringUtils::substr($tweet, $entity['indices'][0], 1);
|
|
$linkText = $hash.$entity['hashtag'];
|
|
|
|
$attributes['href'] = $this->url_base_hash.$entity['hashtag'].'?src=hash';
|
|
$attributes['title'] = '#'.$entity['hashtag'];
|
|
if (!empty($this->class_hash)) {
|
|
$class[] = $this->class_hash;
|
|
}
|
|
if (preg_match(self::$patterns['rtl_chars'], $linkText)) {
|
|
$class[] = 'rtl';
|
|
}
|
|
if (!empty($class)) {
|
|
$attributes['class'] = implode(' ', $class);
|
|
}
|
|
|
|
return $this->linkToText($entity, $linkText, $attributes);
|
|
}
|
|
|
|
/**
|
|
* @param array $entity
|
|
*
|
|
* @return string
|
|
*
|
|
* @since 1.1.0
|
|
*/
|
|
public function linkToMentionAndList($entity)
|
|
{
|
|
$attributes = [];
|
|
|
|
if (!empty($entity['list_slug'])) {
|
|
// Replace the list and username
|
|
$linkText = $entity['screen_name'].$entity['list_slug'];
|
|
$class = $this->class_list;
|
|
$url = $this->url_base_list.$linkText;
|
|
} else {
|
|
// Replace the username
|
|
$linkText = $entity['screen_name'];
|
|
$class = $this->class_user;
|
|
$url = $this->url_base_user.$linkText;
|
|
}
|
|
if (!empty($class)) {
|
|
$attributes['class'] = $class;
|
|
}
|
|
$attributes['href'] = $url;
|
|
|
|
return $this->linkToText($entity, $linkText, $attributes);
|
|
}
|
|
|
|
/**
|
|
* @param array $entity
|
|
* @param string $tweet
|
|
*
|
|
* @return string
|
|
*
|
|
* @since 1.1.0
|
|
*/
|
|
public function linkToCashtag($entity, $tweet = null)
|
|
{
|
|
if (is_null($tweet)) {
|
|
$tweet = $this->tweet;
|
|
}
|
|
$attributes = [];
|
|
$doller = StringUtils::substr($tweet, $entity['indices'][0], 1);
|
|
$linkText = $doller.$entity['cashtag'];
|
|
$attributes['href'] = $this->url_base_cash.$entity['cashtag'];
|
|
$attributes['title'] = $linkText;
|
|
if (!empty($this->class_cash)) {
|
|
$attributes['class'] = $this->class_cash;
|
|
}
|
|
|
|
return $this->linkToText($entity, $linkText, $attributes);
|
|
}
|
|
|
|
/**
|
|
* @param array $entity
|
|
* @param string $text
|
|
* @param array $attributes
|
|
*
|
|
* @return string
|
|
*
|
|
* @since 1.1.0
|
|
*/
|
|
public function linkToText(array $entity, $text, $attributes = [])
|
|
{
|
|
$rel = [];
|
|
if ($this->external) {
|
|
$rel[] = 'external';
|
|
}
|
|
if ($this->nofollow) {
|
|
$rel[] = 'nofollow';
|
|
}
|
|
if ($this->noopener) {
|
|
$rel[] = 'noopener';
|
|
}
|
|
if (!empty($rel)) {
|
|
$attributes['rel'] = implode(' ', $rel);
|
|
}
|
|
if ($this->target) {
|
|
$attributes['target'] = $this->target;
|
|
}
|
|
$link = '<a';
|
|
foreach ($attributes as $key => $val) {
|
|
$link .= ' '.$key.'="'.$this->escapeHTML($val).'"';
|
|
}
|
|
$link .= '>'.$text.'</a>';
|
|
|
|
return $link;
|
|
}
|
|
|
|
/**
|
|
* html escape.
|
|
*
|
|
* @param string $text
|
|
*
|
|
* @return string
|
|
*/
|
|
protected function escapeHTML($text)
|
|
{
|
|
return htmlspecialchars($text, ENT_QUOTES, 'UTF-8', false);
|
|
}
|
|
}
|