Файловый менеджер

Файловый менеджер - Редактировать - /var/www/xthruster/html/wp-content/plugins/sitepress-multilingual-cms/vendor/wpml/sql-parser/src/Statement.php

Назад
<?php /** * The result of the parser is an array of statements are extensions of the * class defined here. * * A statement represents the result of parsing the lexemes. / namespace PhpMyAdmin\SqlParser; use PhpMyAdmin\SqlParser\Components\FunctionCall; use PhpMyAdmin\SqlParser\Components\OptionsArray; /* * Abstract statement definition. * * @category Statements * * @license https://www.gnu.org/licenses/gpl-2.0.txt GPL-2.0+ / abstract class Statement { /* * Options for this statement. * * The option would be the key and the value can be an integer or an array. * * The integer represents only the index used. * * The array may have two keys: `0` is used to represent the index used and * `1` is the type of the option (which may be 'var' or 'var='). Both * options mean they expect a value after the option (e.g. `A = B` or `A B`, * in which case `A` is the key and `B` is the value). The only difference * is in the building process. `var` options are built as `A B` and `var=` * options are built as `A = B` * * Two options that can be used together must have different values for * indexes, else, when they will be used together, an error will occur. * * @var array / public static $OPTIONS = array(); /* * The clauses of this statement, in order. * * The value attributed to each clause is used by the builder and it may * have one of the following values: * * - 1 = 01 - add the clause only * - 2 = 10 - add the keyword * - 3 = 11 - add both the keyword and the clause * * @var array / public static $CLAUSES = array(); public static $END_OPTIONS = array(); /* * The options of this query. * * @var OptionsArray * * @see static::$OPTIONS / public $options; /* * The index of the first token used in this statement. * * @var int / public $first; /* * The index of the last token used in this statement. * * @var int / public $last; /* * Constructor. * * @param Parser $parser the instance that requests parsing * @param TokensList $list the list of tokens to be parsed / public function __construct(Parser $parser = null, TokensList $list = null) { if (($parser !== null) && ($list !== null)) { $this->parse($parser, $list); } } /* * Builds the string representation of this statement. * * @return string / public function build() { /* * Query to be returned. * * @var string / $query = ''; /* * Clauses which were built already. * * It is required to keep track of built clauses because some fields, * for example `join` is used by multiple clauses (`JOIN`, `LEFT JOIN`, * `LEFT OUTER JOIN`, etc.). The same happens for `VALUE` and `VALUES`. * * A clause is considered built just after fields' value * (`$this->field`) was used in building. * * @var array / $built = array(); /* * Statement's clauses. * * @var array / $clauses = $this->getClauses(); foreach ($clauses as $clause) { /* * The name of the clause. * * @var string / $name = $clause[0]; /* * The type of the clause. * * @see self::$CLAUSES * * @var int / $type = $clause[1]; /* * The builder (parser) of this clause. * * @var Component / $class = Parser::$KEYWORD_PARSERS[$name]['class']; /* * The name of the field that is used as source for the builder. * Same field is used to store the result of parsing. * * @var string / $field = Parser::$KEYWORD_PARSERS[$name]['field']; // The field is empty, there is nothing to be built. if (empty($this->$field)) { continue; } // Checking if this field was already built. if ($type & 1) { if (! empty($built[$field])) { continue; } $built[$field] = true; } // Checking if the name of the clause should be added. if ($type & 2) { $query = trim($query) . ' ' . $name; } // Checking if the result of the builder should be added. if ($type & 1) { $query = trim($query) . ' ' . $class::build($this->$field); } } return $query; } /* * Parses the statements defined by the tokens list. * * @param Parser $parser the instance that requests parsing * @param TokensList $list the list of tokens to be parsed * @throws Exceptions\ParserException / public function parse(Parser $parser, TokensList $list) { /* * Array containing all list of clauses parsed. * This is used to check for duplicates. * * @var array / $parsedClauses = array(); // This may be corrected by the parser. $this->first = $list->idx; /* * Whether options were parsed or not. * For statements that do not have any options this is set to `true` by * default. * * @var bool / $parsedOptions = empty(static::$OPTIONS); for (; $list->idx < $list->count; ++$list->idx) { /* * Token parsed at this moment. * * @var Token / $token = $list->tokens[$list->idx]; // End of statement. if ($token->type === Token::TYPE_DELIMITER) { break; } // Checking if this closing bracket is the pair for a bracket // outside the statement. if (($token->value === ')') && ($parser->brackets > 0)) { --$parser->brackets; continue; } // Only keywords are relevant here. Other parts of the query are // processed in the functions below. if ($token->type !== Token::TYPE_KEYWORD) { if (($token->type !== Token::TYPE_COMMENT) && ($token->type !== Token::TYPE_WHITESPACE) ) { $parser->error('Unexpected token.', $token); } continue; } // Unions are parsed by the parser because they represent more than // one statement. if (($token->keyword === 'UNION') \|\| ($token->keyword === 'UNION ALL') \|\| ($token->keyword === 'UNION DISTINCT') \|\| ($token->keyword === 'EXCEPT') \|\| ($token->keyword === 'INTERSECT') ) { break; } $lastIdx = $list->idx; // ON DUPLICATE KEY UPDATE ... // has to be parsed in parent statement (INSERT or REPLACE) // so look for it and break if ($this instanceof Statements\SelectStatement && $token->value === 'ON' ) { ++$list->idx; // Skip ON // look for ON DUPLICATE KEY UPDATE $first = $list->getNextOfType(Token::TYPE_KEYWORD); $second = $list->getNextOfType(Token::TYPE_KEYWORD); $third = $list->getNextOfType(Token::TYPE_KEYWORD); if ($first && $second && $third && $first->value === 'DUPLICATE' && $second->value === 'KEY' && $third->value === 'UPDATE' ) { $list->idx = $lastIdx; break; } } $list->idx = $lastIdx; /* * The name of the class that is used for parsing. * * @var Component / $class = null; /* * The name of the field where the result of the parsing is stored. * * @var string / $field = null; /* * Parser's options. * * @var array / $options = array(); // Looking for duplicated clauses. if (! empty(Parser::$KEYWORD_PARSERS[$token->value]) \|\| ! empty(Parser::$STATEMENT_PARSERS[$token->value]) ) { if (! empty($parsedClauses[$token->value])) { $parser->error( 'This type of clause was previously parsed.', $token ); break; } $parsedClauses[$token->value] = true; } // Checking if this is the beginning of a clause. // Fix Issue #221: As `truncate` is not a keyword // but it might be the beginning of a statement of truncate, // so let the value use the keyword field for truncate type. $token_value = in_array($token->keyword, array('TRUNCATE')) ? $token->keyword : $token->value; if (! empty(Parser::$KEYWORD_PARSERS[$token_value]) && $list->idx < $list->count) { $class = Parser::$KEYWORD_PARSERS[$token_value]['class']; $field = Parser::$KEYWORD_PARSERS[$token_value]['field']; if (! empty(Parser::$KEYWORD_PARSERS[$token_value]['options'])) { $options = Parser::$KEYWORD_PARSERS[$token_value]['options']; } } // Checking if this is the beginning of the statement. if (! empty(Parser::$STATEMENT_PARSERS[$token->keyword])) { if (! empty(static::$CLAUSES) // Undefined for some statements. && empty(static::$CLAUSES[$token->value]) ) { // Some keywords (e.g. `SET`) may be the beginning of a // statement and a clause. // If such keyword was found and it cannot be a clause of // this statement it means it is a new statement, but no // delimiter was found between them. $parser->error( 'A new statement was found, but no delimiter between it and the previous one.', $token ); break; } if (! $parsedOptions) { if (empty(static::$OPTIONS[$token->value])) { // Skipping keyword because if it is not a option. ++$list->idx; } $this->options = OptionsArray::parse( $parser, $list, static::$OPTIONS ); $parsedOptions = true; } } elseif ($class === null) { if ($this instanceof Statements\SelectStatement && ($token->value === 'FOR UPDATE' \|\| $token->value === 'LOCK IN SHARE MODE') ) { // Handle special end options in Select statement // See Statements\SelectStatement::$END_OPTIONS $this->end_options = OptionsArray::parse( $parser, $list, static::$END_OPTIONS ); } elseif ($this instanceof Statements\SetStatement && ($token->value === 'COLLATE' \|\| $token->value === 'DEFAULT') ) { // Handle special end options in SET statement // See Statements\SetStatement::$END_OPTIONS $this->end_options = OptionsArray::parse( $parser, $list, static::$END_OPTIONS ); } else { // There is no parser for this keyword and isn't the beginning // of a statement (so no options) either. $parser->error('Unrecognized keyword.', $token); continue; } } $this->before($parser, $list, $token); // Parsing this keyword. if ($class !== null) { // We can't parse keyword at the end of statement if ($list->idx >= $list->count) { $parser->error('Keyword at end of statement.', $token); continue; } ++$list->idx; // Skipping keyword or last option. $this->$field = $class::parse($parser, $list, $options); } $this->after($parser, $list, $token); // #223 Here may make a patch, if last is delimiter, back one // TODO: when not supporting PHP 5.3 anymore, replace this by FunctionCall::class. if ($class === 'PhpMyAdmin\\SqlParser\\Components\\FunctionCall' && $list->offsetGet($list->idx)->type === Token::TYPE_DELIMITER ) { --$list->idx; } } // This may be corrected by the parser. $this->last = --$list->idx; // Go back to last used token. } /* * Function called before the token is processed. * * @param Parser $parser the instance that requests parsing * @param TokensList $list the list of tokens to be parsed * @param Token $token the token that is being parsed / public function before(Parser $parser, TokensList $list, Token $token) { } /* * Function called after the token was processed. * * @param Parser $parser the instance that requests parsing * @param TokensList $list the list of tokens to be parsed * @param Token $token the token that is being parsed / public function after(Parser $parser, TokensList $list, Token $token) { } /* * Gets the clauses of this statement. * * @return array / public function getClauses() { return static::$CLAUSES; } /* * Builds the string representation of this statement. * * @see static::build * * @return string / public function __toString() { return $this->build(); } /* * Validates the order of the clauses in parsed statement * Ideally this should be called after successfully * completing the parsing of each statement. * * @param Parser $parser the instance that requests parsing * @param TokensList $list the list of tokens to be parsed * * @return bool * @throws Exceptions\ParserException / public function validateClauseOrder($parser, $list) { $clauses = array_flip(array_keys($this->getClauses())); if (empty($clauses) \|\| count($clauses) === 0) { return true; } $minIdx = -1; /* * For tracking JOIN clauses in a query * = 0 - JOIN not found till now * > 0 - Index of first JOIN clause in the statement. * * @var int / $minJoin = 0; /* * For tracking JOIN clauses in a query * = 0 - JOIN not found till now * > 0 - Index of last JOIN clause * (which appears together with other JOINs) * in the statement. * * @var int */ $maxJoin = 0; $error = 0; $lastIdx = 0; foreach ($clauses as $clauseType => $index) { $clauseStartIdx = Utils\Query::getClauseStartOffset( $this, $list, $clauseType ); if ($clauseStartIdx !== -1 && $this instanceof Statements\SelectStatement && ($clauseType === 'FORCE' \|\| $clauseType === 'IGNORE' \|\| $clauseType === 'USE') ) { // TODO: ordering of clauses in a SELECT statement with // Index hints is not supported return true; } // Handle ordering of Multiple Joins in a query if ($clauseStartIdx !== -1) { if ($minJoin === 0 && stripos($clauseType, 'JOIN')) { // First JOIN clause is detected $minJoin = $maxJoin = $clauseStartIdx; } elseif ($minJoin !== 0 && ! stripos($clauseType, 'JOIN')) { // After a previous JOIN clause, a non-JOIN clause has been detected $maxJoin = $lastIdx; } elseif ($maxJoin < $clauseStartIdx && stripos($clauseType, 'JOIN')) { $error = 1; } } if ($clauseStartIdx !== -1 && $clauseStartIdx < $minIdx) { if ($minJoin === 0 \|\| $error === 1) { $token = $list->tokens[$clauseStartIdx]; $parser->error( 'Unexpected ordering of clauses.', $token ); return false; } $minIdx = $clauseStartIdx; } elseif ($clauseStartIdx !== -1) { $minIdx = $clauseStartIdx; } $lastIdx = ($clauseStartIdx !== -1) ? $clauseStartIdx : $lastIdx; } return true; } }

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