/**
* @param Parser $parser The instance that requests parsing.
* @param TokensList $list The list of tokens to be parsed.
*
* @return void
*/
public function parse(Parser $parser, TokensList $list)
{
++$list->idx;
// Skipping `DELETE`.
// parse any options if provided
$this->options = OptionsArray::parse($parser, $list, static::$OPTIONS);
++$list->idx;
/**
* The state of the parser.
*
* Below are the states of the parser.
*
* 0 ---------------------------------[ FROM ]----------------------------------> 2
* 0 ------------------------------[ table[.*] ]--------------------------------> 1
* 1 ---------------------------------[ FROM ]----------------------------------> 2
* 2 --------------------------------[ USING ]----------------------------------> 3
* 2 --------------------------------[ WHERE ]----------------------------------> 4
* 2 --------------------------------[ ORDER ]----------------------------------> 5
* 2 --------------------------------[ LIMIT ]----------------------------------> 6
*
* @var int $state
*/
$state = 0;
/**
* If the query is multi-table or not
*
* @var bool $multiTable
*/
$multiTable = false;
for (; $list->idx < $list->count; ++$list->idx) {
/**
* Token parsed at this moment.
*
* @var Token $token
*/
$token = $list->tokens[$list->idx];
// End of statement.
if ($token->type === Token::TYPE_DELIMITER) {
break;
}
if ($state === 0) {
if ($token->type === Token::TYPE_KEYWORD && $token->value !== 'FROM') {
$parser->error(__('Unexpected keyword.'), $token);
break;
} elseif ($token->type === Token::TYPE_KEYWORD && $token->value === 'FROM') {
++$list->idx;
// Skip 'FROM'
$this->from = ExpressionArray::parse($parser, $list);
$state = 2;
} else {
$this->columns = ExpressionArray::parse($parser, $list);
$state = 1;
}
} elseif ($state === 1) {
if ($token->type === Token::TYPE_KEYWORD && $token->value !== 'FROM') {
$parser->error(__('Unexpected keyword.'), $token);
break;
} elseif ($token->type === Token::TYPE_KEYWORD && $token->value === 'FROM') {
++$list->idx;
// Skip 'FROM'
$this->from = ExpressionArray::parse($parser, $list);
$state = 2;
} else {
$parser->error(__('Unexpected token.'), $token);
break;
}
} elseif ($state === 2) {
if ($token->type === Token::TYPE_KEYWORD && $token->value === 'USING') {
++$list->idx;
// Skip 'USING'
$this->using = ExpressionArray::parse($parser, $list);
$state = 3;
$multiTable = true;
} elseif ($token->type === Token::TYPE_KEYWORD && $token->value === 'WHERE') {
++$list->idx;
// Skip 'WHERE'
$this->where = Condition::parse($parser, $list);
$state = 4;
} elseif ($token->type === Token::TYPE_KEYWORD && $token->value === 'ORDER BY') {
++$list->idx;
// Skip 'ORDER BY'
$this->order = OrderKeyword::parse($parser, $list);
$state = 5;
} elseif ($token->type === Token::TYPE_KEYWORD && $token->value === 'LIMIT') {
++$list->idx;
// Skip 'LIMIT'
$this->limit = Limit::parse($parser, $list);
$state = 6;
} elseif ($token->type === Token::TYPE_KEYWORD) {
$parser->error(__('Unexpected keyword.'), $token);
break;
}
} elseif ($state === 3) {
if ($token->type === Token::TYPE_KEYWORD && $token->value === 'WHERE') {
++$list->idx;
// Skip 'WHERE'
$this->where = Condition::parse($parser, $list);
$state = 4;
} elseif ($token->type === Token::TYPE_KEYWORD) {
$parser->error(__('Unexpected keyword.'), $token);
break;
} else {
$parser->error(__('Unexpected token.'), $token);
break;
}
} elseif ($state === 4) {
if ($multiTable === true && $token->type === Token::TYPE_KEYWORD) {
$parser->error(__('This type of clause is not valid in Multi-table queries.'), $token);
break;
}
if ($token->type === Token::TYPE_KEYWORD && $token->value === 'ORDER BY') {
++$list->idx;
// Skip 'ORDER BY'
$this->order = OrderKeyword::parse($parser, $list);
$state = 5;
} elseif ($token->type === Token::TYPE_KEYWORD && $token->value === 'LIMIT') {
++$list->idx;
// Skip 'LIMIT'
$this->limit = Limit::parse($parser, $list);
$state = 6;
} elseif ($token->type === Token::TYPE_KEYWORD) {
$parser->error(__('Unexpected keyword.'), $token);
break;
}
} elseif ($state === 5) {
if ($token->type === Token::TYPE_KEYWORD && $token->value === 'LIMIT') {
++$list->idx;
// Skip 'LIMIT'
$this->limit = Limit::parse($parser, $list);
$state = 6;
} elseif ($token->type === Token::TYPE_KEYWORD) {
$parser->error(__('Unexpected keyword.'), $token);
break;
}
}
}
if ($state >= 2) {
foreach ($this->from as $from_expr) {
$from_expr->database = $from_expr->table;
$from_expr->table = $from_expr->column;
$from_expr->column = null;
}
}
--$list->idx;
}
public function testBuild()
{
$this->assertEquals(OrderKeyword::build(array(new OrderKeyword(new Expression('a'), 'ASC'), new OrderKeyword(new Expression('b'), 'DESC'))), 'a ASC, b DESC');
}