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<?php
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/**
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* This file is part of the O2System Framework package.
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*
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* @author Steeve Andrian Salim
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* @copyright Copyright (c) Steeve Andrian Salim
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*/
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// ------------------------------------------------------------------------
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namespace O2System\Parser\String\Engines;
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// ------------------------------------------------------------------------
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use O2System\Spl\Patterns\Structural\Provider\AbstractProvider;
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use O2System\Spl\Patterns\Structural\Provider\ValidationInterface;
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use O2System\Spl\Traits\Collectors\ConfigCollectorTrait;
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use O2System\Spl\Traits\Collectors\FileExtensionCollectorTrait;
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use O2System\Spl\Traits\Collectors\FilePathCollectorTrait;
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/**
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* Class Shortcodes
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*
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* This parser engine is used to parse WordPress "shortcodes".
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* The tag and attribute parsing or regular expression code is
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* based on the TextPattern tag parser.
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*
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* A few examples are below:
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*
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* [shortcode /]
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* [shortcode foo="bar" baz="bing" /]
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* [shortcode foo="bar"]content[/shortcode]
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*
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* Shortcode tags support attributes and enclosed content, but does not entirely
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* support inline shortcodes in other shortcodes. You will have to call the
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* shortcode parser in your function to account for that.
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*
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* @package O2System\Parser\Template\Engines
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*/
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class Shortcodes extends AbstractProvider implements
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ValidationInterface
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{
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use FileExtensionCollectorTrait;
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use FilePathCollectorTrait;
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use ConfigCollectorTrait;
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/**
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* Shortcodes::$config
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*
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* Shortcodes engine configurations.
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*
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* @var array
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*/
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protected $config;
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// ------------------------------------------------------------------------
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/**
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* Shortcodes::__construct
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*
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* @param array $config
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*/
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public function __construct(array $config = [])
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{
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$this->config = array_merge($this->config, $config);
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}
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// ------------------------------------------------------------------------
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/**
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* Shortcodes::parseFile
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*
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* @param string $filePath
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* @param array $vars
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*
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* @return string
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*/
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public function parseFile($filePath, array $vars = [])
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{
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if (is_file($filePath)) {
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return $this->parseString(file_get_contents($filePath), $vars);
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}
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// Try to find from filePaths
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if (count($this->filePaths)) {
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foreach ($this->filePaths as $fileDirectory) {
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if (is_file($fileDirectory . $filePath)) {
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return $this->parseString(file_get_contents($fileDirectory . $filePath), $vars);
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break;
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}
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}
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}
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return null;
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}
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// ------------------------------------------------------------------------
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/**
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* Shortcodes::parseString
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*
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* @param string $source
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* @param array $vars
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*
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* @return mixed
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*/
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public function parseString($source, array $vars = [])
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{
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if (count($vars)) {
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foreach ($vars as $offset => $shortcode) {
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$this->register($shortcode, $offset);
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}
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}
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$pattern = $this->getRegex();
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return preg_replace_callback('/' . $pattern . '/s', [&$this, 'parseRegex'], $source);
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}
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// ------------------------------------------------------------------------
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/**
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* Shortcodes::getRegex
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*
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* Retrieve the shortcode regular expression for searching.
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*
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* The regular expression combines the shortcode tags in the regular expression
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* in a regex class.
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*
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* The regular expresion contains 6 different sub matches to help with parsing.
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*
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* 1/6 - An extra [ or ] to allow for escaping shortcodes with double [[]]
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* 2 - The shortcode name
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* 3 - The shortcode argument list
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* 4 - The self closing /
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* 5 - The content of a shortcode when it wraps some content.
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*
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* @return string The shortcode search regular expression
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*/
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private function getRegex()
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{
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$shortcodes = $this->getIterator();
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$offsetKeys = $shortcodes->getKeys();
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$offsetRegex = join('|', array_map('preg_quote', $offsetKeys));
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// WARNING! Do not change this regex
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return '(.?)\[(' . $offsetRegex . ')\b(.*?)(?:(\/))?\](?:(.+?)\[\/\2\])?(.?)';
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}
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// ------------------------------------------------------------------------
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/**
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* Shortcodes::validate
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*
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* @param mixed $value
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*
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* @return bool
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*/
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public function validate($value)
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{
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return (bool)is_callable($value);
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}
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// ------------------------------------------------------------------------
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/**
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* Shortcodes::parseRegex
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*
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* Regular Expression callable for Shortcodes::parseString for calling shortcode hook.
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*
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* @see Shortcodes::getRegex for details of the match array contents.
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*
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* @since 1.0
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* @access private
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* @uses $shortcode_tags
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*
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* @param array $match Regular expression match array
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*
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* @return mixed False on failure.
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*/
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private function parseRegex($match)
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{
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// allow [[foo]] syntax for escaping a tag
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if ($match[ 1 ] == '[' && $match[ 6 ] == ']') {
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return substr($match[ 0 ], 1, -1);
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}
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$offset = $match[ 2 ];
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$attr = $this->parseRegexAttributes($match[ 3 ]);
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if ($this->exists($offset)) {
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if (isset($match[ 5 ])) {
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// enclosing tag - extra parameter
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return $match[ 1 ] . call_user_func(
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$this->__get($offset),
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$attr,
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$match[ 5 ],
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$offset
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) . $match[ 6 ];
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} else {
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// self-closing tag
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return $match[ 1 ] . call_user_func($this->__get($offset), $attr, null, $offset) . $match[ 6 ];
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}
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}
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}
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// ------------------------------------------------------------------------
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/**
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* Shortcodes::parseRegexAttr
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*
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* Retrieve all attributes from the shortcodes tag.
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*
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* The attributes list has the attribute name as the key and the value of the
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* attribute as the value in the key/value pair. This allows for easier
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* retrieval of the attributes, since all attributes have to be known.
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*
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* @since 1.0
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*
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* @param string $string
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*
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* @return array List of attributes and their value.
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*/
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private function parseRegexAttributes($string)
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{
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$attr = [];
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$pattern = '/(\w+)\s*=\s*"([^"]*)"(?:\s|$)|(\w+)\s*=\s*\'([^\']*)\'(?:\s|$)|(\w+)\s*=\s*([^\s\'"]+)(?:\s|$)|"([^"]*)"(?:\s|$)|(\S+)(?:\s|$)/';
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$string = preg_replace("/[\x{00a0}\x{200b}]+/u", " ", $string);
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if (preg_match_all($pattern, $string, $match, PREG_SET_ORDER)) {
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foreach ($match as $m) {
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if ( ! empty($m[ 1 ])) {
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$attr[ strtolower($m[ 1 ]) ] = stripcslashes($m[ 2 ]);
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} elseif ( ! empty($m[ 3 ])) {
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$attr[ strtolower($m[ 3 ]) ] = stripcslashes($m[ 4 ]);
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} elseif ( ! empty($m[ 5 ])) {
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$attr[ strtolower($m[ 5 ]) ] = stripcslashes($m[ 6 ]);
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} elseif (isset($m[ 7 ]) and strlen($m[ 7 ])) {
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$attr[] = stripcslashes($m[ 7 ]);
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} elseif (isset($m[ 8 ])) {
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$attr[] = stripcslashes($m[ 8 ]);
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}
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}
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} else {
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$attr = ltrim($string);
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}
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return $attr;
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}
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} |
o2system /
parser
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The
breakstatement is not necessary if it is preceded for example by areturnstatement:If you would like to keep this construct to be consistent with other
casestatements, you can safely mark this issue as a false-positive.