95 lines
2.7 KiB
PHP
Executable File
95 lines
2.7 KiB
PHP
Executable File
<?php
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/**
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* Handlebars parser (based on mustache)
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*
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* This class is responsible for turning raw template source into a set of
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* Handlebars tokens.
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*
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* @category Xamin
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* @package Handlebars
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* @author fzerorubigd <fzerorubigd@gmail.com>
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* @author Behrooz Shabani <everplays@gmail.com>
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* @author Mardix <https://github.com/mardix>
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* @copyright 2012 (c) ParsPooyesh Co
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* @copyright 2013 (c) Behrooz Shabani
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* @copyright 2013 (c) Mardix
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* @license MIT
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* @link http://voodoophp.org/docs/handlebars
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*/
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namespace Handlebars;
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use ArrayIterator;
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use LogicException;
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class Parser
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{
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/**
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* Process array of tokens and convert them into parse tree
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*
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* @param array $tokens Set of
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*
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* @return array Token parse tree
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*/
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public function parse(Array $tokens = [])
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{
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return $this->buildTree(new ArrayIterator($tokens));
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}
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/**
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* Helper method for recursively building a parse tree.
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*
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* @param \ArrayIterator $tokens Stream of tokens
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*
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* @throws \LogicException when nesting errors or mismatched section tags
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* are encountered.
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* @return array Token parse tree
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*
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*/
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private function buildTree(ArrayIterator $tokens)
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{
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$stack = [];
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do {
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$token = $tokens->current();
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$tokens->next();
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if ($token === null) {
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continue;
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} else {
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switch ($token[Tokenizer::TYPE]) {
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case Tokenizer::T_END_SECTION:
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$newNodes = [];
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do {
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$result = array_pop($stack);
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if ($result === null) {
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throw new LogicException(
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'Unexpected closing tag: /' . $token[Tokenizer::NAME]
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);
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}
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if (!array_key_exists(Tokenizer::NODES, $result)
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&& isset($result[Tokenizer::NAME])
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&& $result[Tokenizer::NAME] == $token[Tokenizer::NAME]
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) {
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$result[Tokenizer::NODES] = $newNodes;
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$result[Tokenizer::END] = $token[Tokenizer::INDEX];
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array_push($stack, $result);
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break 2;
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} else {
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array_unshift($newNodes, $result);
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}
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} while (true);
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break;
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default:
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array_push($stack, $token);
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}
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}
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} while ($tokens->valid());
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return $stack;
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}
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}
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