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<?php |
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/* @description Transformation Style Sheets - Revolutionising PHP templating * |
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* @author Tom Butler [email protected] * |
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* @copyright 2017 Tom Butler <[email protected]> | https://r.je/ * |
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* @license http://www.opensource.org/licenses/bsd-license.php BSD License * |
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* @version 1.2 */ |
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namespace Transphporm\Parser; |
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class Tokens implements \Iterator, \Countable { |
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private $tokens = []; |
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private $iterator = 0; |
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public function __construct($tokens = []) { |
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$this->tokens = $tokens; |
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} |
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public function count() { |
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return count($this->tokens); |
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} |
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// Iterator Functions |
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public function current() { |
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return $this->tokens[$this->iterator]; |
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} |
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public function key() { |
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return $this->iterator; |
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} |
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public function next() { |
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++$this->iterator; |
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} |
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public function valid() { |
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return isset($this->tokens[$this->iterator]); |
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} |
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public function rewind() { |
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$this->iterator = 0; |
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} |
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public function add($token) { |
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if ($token instanceof Tokens) $this->tokens = array_merge($this->tokens, $token->tokens); |
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else $this->tokens[] = $token; |
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} |
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public function end() { |
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return end($this->tokens); |
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} |
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private function getKeysOfTokenType($tokenType) { |
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return array_keys(array_column($this->tokens, 'type'), $tokenType); |
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} |
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private function getKeyToSlice($tokenType) { |
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$keys = $this->getKeysOfTokenType($tokenType); |
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if (empty($keys)) return false; |
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$key = $keys[0]; |
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for ($i = 0; $key < $this->iterator && isset($keys[$i]); $i++) $key = $keys[$i]; |
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return $key; |
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} |
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public function from($tokenType, $inclusive = false) { |
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return $this->sliceTokens($tokenType, "from", !$inclusive); |
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} |
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public function to($tokenType, $inclusive = false) { |
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return $this->sliceTokens($tokenType, "to", $inclusive); |
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} |
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private function sliceTokens($tokenType, $type, $increment = false) { |
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$key = $this->getKeyToSlice($tokenType); |
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if ($key === false) return new Tokens([]); |
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if ($increment) $key++; |
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if ($type === "from") return new Tokens(array_slice($this->tokens, $key)); |
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else return new Tokens(array_slice($this->tokens, $this->iterator, $key)); |
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} |
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public function skip($count) { |
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$this->iterator += $count; |
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} |
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public function splitOnToken($tokenType) { |
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$splitTokens = []; |
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$i = 0; |
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foreach ($this->tokens as $token) { |
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if ($token['type'] === $tokenType) $i++; |
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else $splitTokens[$i][] = $token; |
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} |
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return array_map(function ($tokens) { |
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return new Tokens($tokens); |
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}, $splitTokens); |
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//return $splitTokens; |
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} |
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public function trim() { |
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$tokens = $this->tokens; |
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$tokensToTrim = [Tokenizer::WHITESPACE, Tokenizer::NEW_LINE]; |
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// Remove end whitespace |
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while ($tokens && in_array(end($tokens)['type'], $tokensToTrim)) { |
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array_pop($tokens); |
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} |
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// Remove begining whitespace |
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while (isset($tokens[0]) && in_array($tokens[0]['type'], $tokensToTrim)) { |
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array_shift($tokens); |
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} |
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return new Tokens($tokens); |
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} |
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public function removeLine() { |
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$tokens = $this->tokens; |
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foreach ($tokens as &$token) unset($token['line']); |
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return new Tokens($tokens); |
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} |
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public function read($offset = 0) { |
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return isset($this->tokens[$offset]) ? $this->tokens[$offset]['value'] : false; |
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} |
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public function type($offset = 0) { |
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return isset($this->tokens[$offset]) ? $this->tokens[$offset]['type'] : false; |
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} |
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} |
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Level-2 /
Transphporm
This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent.
Consider making the comparison explicit by using
empty(..)or! empty(...)instead.