Chris@14: <?php declare(strict_types = 1);
Chris@14: namespace TheSeer\Tokenizer;
Chris@14: 
Chris@14: class TokenCollection implements \ArrayAccess, \Iterator, \Countable {
Chris@14: 
Chris@14:     /**
Chris@14:      * @var Token[]
Chris@14:      */
Chris@14:     private $tokens = [];
Chris@14: 
Chris@14:     /**
Chris@14:      * @var int
Chris@14:      */
Chris@14:     private $pos;
Chris@14: 
Chris@14:     /**
Chris@14:      * @param Token $token
Chris@14:      */
Chris@14:     public function addToken(Token $token) {
Chris@14:         $this->tokens[] = $token;
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * @return Token
Chris@14:      */
Chris@14:     public function current(): Token {
Chris@14:         return current($this->tokens);
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * @return int
Chris@14:      */
Chris@14:     public function key(): int {
Chris@14:         return key($this->tokens);
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * @return void
Chris@14:      */
Chris@14:     public function next() {
Chris@14:         next($this->tokens);
Chris@14:         $this->pos++;
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * @return bool
Chris@14:      */
Chris@14:     public function valid(): bool {
Chris@14:         return $this->count() > $this->pos;
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * @return void
Chris@14:      */
Chris@14:     public function rewind() {
Chris@14:         reset($this->tokens);
Chris@14:         $this->pos = 0;
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * @return int
Chris@14:      */
Chris@14:     public function count(): int {
Chris@14:         return count($this->tokens);
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * @param mixed $offset
Chris@14:      *
Chris@14:      * @return bool
Chris@14:      */
Chris@14:     public function offsetExists($offset): bool {
Chris@14:         return isset($this->tokens[$offset]);
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * @param mixed $offset
Chris@14:      *
Chris@14:      * @return Token
Chris@14:      * @throws TokenCollectionException
Chris@14:      */
Chris@14:     public function offsetGet($offset): Token {
Chris@14:         if (!$this->offsetExists($offset)) {
Chris@14:             throw new TokenCollectionException(
Chris@14:                 sprintf('No Token at offest %s', $offset)
Chris@14:             );
Chris@14:         }
Chris@14: 
Chris@14:         return $this->tokens[$offset];
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * @param mixed $offset
Chris@14:      * @param Token $value
Chris@14:      *
Chris@14:      * @throws TokenCollectionException
Chris@14:      */
Chris@14:     public function offsetSet($offset, $value) {
Chris@14:         if (!is_int($offset)) {
Chris@14:             $type = gettype($offset);
Chris@14:             throw new TokenCollectionException(
Chris@14:                 sprintf(
Chris@14:                     'Offset must be of type integer, %s given',
Chris@14:                     $type === 'object' ? get_class($value) : $type
Chris@14:                 )
Chris@14:             );
Chris@14:         }
Chris@14:         if (!$value instanceof Token) {
Chris@14:             $type = gettype($value);
Chris@14:             throw new TokenCollectionException(
Chris@14:                 sprintf(
Chris@14:                     'Value must be of type %s, %s given',
Chris@14:                     Token::class,
Chris@14:                     $type === 'object' ? get_class($value) : $type
Chris@14:                 )
Chris@14:             );
Chris@14:         }
Chris@14:         $this->tokens[$offset] = $value;
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * @param mixed $offset
Chris@14:      */
Chris@14:     public function offsetUnset($offset) {
Chris@14:         unset($this->tokens[$offset]);
Chris@14:     }
Chris@14: 
Chris@14: }