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<?php |
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/** |
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* @package s9e\TextFormatter |
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* @copyright Copyright (c) 2010-2018 The s9e Authors |
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* @license http://www.opensource.org/licenses/mit-license.php The MIT License |
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*/ |
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namespace s9e\TextFormatter\Configurator\RendererGenerators\PHP\XPathConvertor\Convertors; |
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class SingleByteStringManipulation extends AbstractConvertor |
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{ |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getRegexpGroups() |
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{ |
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return [ |
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'SubstringAfter' => 'String', |
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'SubstringBefore' => 'String', |
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'Translate' => 'String' |
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]; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getRegexps() |
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{ |
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return [ |
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'SubstringAfter' => 'substring-after \\( ((?&String)) , ((?&LiteralString)) \\)', |
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'SubstringBefore' => 'substring-before \\( ((?&String)) , ((?&String)) \\)', |
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'Translate' => 'translate \\( ((?&String)) , ((?&LiteralString)) , ((?&LiteralString)) \\)' |
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]; |
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} |
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/** |
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* Convert a call to substring-after() where the second argument is a literal string |
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* |
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* @param string $expr |
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* @param string $str |
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* @return string |
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*/ |
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public function convertSubstringAfter($expr, $str) |
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{ |
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return 'substr(strstr(' . $this->convert($expr) . ',' . $this->convert($str) . '),' . (strlen($str) - 2) . ')'; |
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} |
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/** |
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* Convert a call to substring-before() |
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* |
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* @param string $expr1 |
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* @param string $expr2 |
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* @return string |
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*/ |
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public function convertSubstringBefore($expr1, $expr2) |
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{ |
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return 'strstr(' . $this->convert($expr1) . ',' . $this->convert($expr2) . ',true)'; |
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} |
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/** |
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* Convert a call to translate() where the second and third arguments are literal strings |
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* |
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* @param string $expr |
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* @param string $from |
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* @param string $to |
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* @return string |
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*/ |
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public function convertTranslate($expr, $from, $to) |
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{ |
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$from = $this->splitStringChars($from); |
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$to = $this->splitStringChars($to); |
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// Add missing elements to $to then remove duplicates from $from and keep matching elements |
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$to = array_pad($to, count($from), ''); |
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$from = array_unique($from); |
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$to = array_intersect_key($to, $from); |
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// Build the arguments list for the strtr() call |
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$args = [$this->convert($expr)]; |
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if ($this->isAsciiChars($from) && $this->isAsciiChars($to)) |
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{ |
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$args[] = $this->serializeAsciiChars($from); |
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$args[] = $this->serializeAsciiChars($to); |
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} |
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else |
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{ |
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$args[] = $this->serializeMap($from, $to); |
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} |
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return 'strtr(' . implode(',', $args) . ')'; |
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} |
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/** |
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* Test whether given list of strings contains only single ASCII characters |
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* |
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* @param string[] $chars |
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* @return bool |
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*/ |
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protected function isAsciiChars(array $chars) |
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{ |
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return ([1] === array_unique(array_map('strlen', $chars))); |
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} |
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/** |
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* Serialize a list of ASCII chars into a single PHP string |
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* |
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* @param string[] $chars |
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* @return string |
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*/ |
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protected function serializeAsciiChars(array $chars) |
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{ |
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return var_export(implode('', $chars), true); |
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} |
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/** |
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* Serialize the lists of characters to replace with strtr() |
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* |
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* @param string[] $from |
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* @param string[] $to |
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* @return string |
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*/ |
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protected function serializeMap(array $from, array $to) |
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{ |
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$elements = []; |
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foreach ($from as $k => $str) |
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{ |
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$elements[] = var_export($str, true) . '=>' . var_export($to[$k], true); |
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} |
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return '[' . implode(',', $elements) . ']'; |
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} |
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/** |
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* Split individual characters from given literal string |
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* |
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* @param string $string Original string, including quotes |
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* @return string[] |
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*/ |
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protected function splitStringChars($string) |
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{ |
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preg_match_all('(.)su', substr($string, 1, -1), $matches); |
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return $matches[0]; |
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} |
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} |
s9e /
TextFormatter
