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<?php |
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namespace PhpHocon\Token; |
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use PhpHocon\Exception\ParseException; |
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use PhpHocon\Token\Parser\AssignmentParser; |
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use PhpHocon\Token\Parser\KeyParser; |
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use PhpHocon\Token\Parser\Parser; |
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use PhpHocon\Token\Parser\ParserState; |
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use PhpHocon\Token\Parser\ValueParser; |
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use PhpHocon\Token\Parser\WhitespaceParser; |
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class HoconTokenizer implements Tokenizer |
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{ |
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/** |
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* @var array |
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*/ |
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private $tokens; |
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/** |
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* @var Parser[] |
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*/ |
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private $parserChain; |
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public function __construct() |
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{ |
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$this->parserChain = [ |
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new KeyParser(), |
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new ValueParser(), |
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new AssignmentParser(), |
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new WhitespaceParser() |
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]; |
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} |
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/** |
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* @param string $input |
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* @return array |
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*/ |
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public function tokenize($input) |
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{ |
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$this->tokens = []; |
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$chars = $this->createCharacterList($input); |
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$initialState = new ParserState($chars, 0, false, true); |
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$endState = $this->parseState($initialState); |
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$this->checkParserState($endState); |
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return $this->tokens; |
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} |
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/** |
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* @param ParserState $state |
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*/ |
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private function checkParserState(ParserState $state) |
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{ |
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if (count($state->getCharacters())) { |
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throw new ParseException( |
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'Config file was not parsed completely. Remaining: ' . implode($state->getCharacters()) |
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); |
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} |
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} |
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/** |
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* @param $input |
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* @return array |
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*/ |
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private function createCharacterList($input) |
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{ |
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$chars = str_split($input); |
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if ($chars[0] !== Tokens::LEFT_BRACE) { |
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return $chars; |
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} |
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if ($chars[count($chars)-1] !== Tokens::RIGHT_BRACE) { |
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throw new ParseException('Brace count is not equal'); |
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} |
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return array_slice($chars, 1, -1); |
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} |
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private function parseState(ParserState $state) |
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{ |
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if (count($state->getCharacters()) === 0) { |
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return $state; |
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} |
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foreach ($this->parserChain as $parser) { |
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if ($parser->canParse($state)) { |
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$result = $parser->parse($state); |
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if (null !== $element = $result->getElement()) { |
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$this->tokens[] = $result->getElement(); |
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} |
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return $this->parseState($result->getState()); |
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} |
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} |
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return $state; |
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} |
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} |
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shanethehat /
php-hocon
