385 lines
11 KiB
PHP
385 lines
11 KiB
PHP
<?php
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/*
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* $Id$
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information, see
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* <http://www.phpdoctrine.com>.
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*/
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/**
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* Doctrine_Query_Tokenizer
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*
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* @package Doctrine
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* @subpackage Query
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* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
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* @link www.phpdoctrine.com
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* @since 1.0
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* @version $Revision$
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* @todo Give the tokenizer state, make it better work together with Doctrine_Query and maybe
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* take out commonly used string manipulation methods
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* into a stateless StringUtil? class. This tokenizer should be concerned with tokenizing
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* DQL strings.
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*/
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class Doctrine_Query_Tokenizer
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{
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/**
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* tokenizeQuery
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* splits the given dql query into an array where keys
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* represent different query part names and values are
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* arrays splitted using sqlExplode method
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*
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* example:
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*
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* parameter:
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* $query = "SELECT u.* FROM User u WHERE u.name LIKE ?"
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* returns:
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* array('select' => array('u.*'),
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* 'from' => array('User', 'u'),
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* 'where' => array('u.name', 'LIKE', '?'))
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*
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* @param string $query DQL query
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* @throws Doctrine_Query_Exception if some generic parsing error occurs
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* @return array an array containing the query string parts
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*/
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public function tokenizeQuery($query)
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{
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$parts = array();
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$tokens = $this->sqlExplode($query, ' ');
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foreach ($tokens as $index => $token) {
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$token = trim($token);
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switch (strtolower($token)) {
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case 'delete':
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case 'update':
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case 'select':
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case 'set':
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case 'from':
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case 'where':
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case 'limit':
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case 'offset':
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case 'having':
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$p = $token;
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//$parts[$token] = array();
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$parts[$token] = '';
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break;
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case 'order':
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case 'group':
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$i = ($index + 1);
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if (isset($tokens[$i]) && strtolower($tokens[$i]) === 'by') {
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$p = $token;
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$parts[$token] = '';
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//$parts[$token] = array();
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} else {
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$parts[$p] .= "$token ";
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//$parts[$p][] = $token;
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}
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break;
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case 'by':
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continue;
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default:
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if ( ! isset($p)) {
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throw new Doctrine_Query_Tokenizer_Exception(
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"Couldn't tokenize query. Encountered invalid token: '$token'.");
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}
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$parts[$p] .= "$token ";
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//$parts[$p][] = $token;
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}
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}
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return $parts;
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}
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/**
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* trims brackets
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*
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* @param string $str
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* @param string $e1 the first bracket, usually '('
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* @param string $e2 the second bracket, usually ')'
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*/
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public function bracketTrim($str, $e1 = '(', $e2 = ')')
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{
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if (substr($str, 0, 1) === $e1 && substr($str, -1) === $e2) {
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return substr($str, 1, -1);
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} else {
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return $str;
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}
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}
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/**
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* bracketExplode
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*
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* example:
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*
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* parameters:
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* $str = (age < 20 AND age > 18) AND email LIKE 'John@example.com'
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* $d = ' AND '
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* $e1 = '('
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* $e2 = ')'
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*
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* would return an array:
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* array("(age < 20 AND age > 18)",
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* "email LIKE 'John@example.com'")
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*
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* @param string $str
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* @param string $d the delimeter which explodes the string
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* @param string $e1 the first bracket, usually '('
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* @param string $e2 the second bracket, usually ')'
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*
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*/
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public function bracketExplode($str, $d = ' ', $e1 = '(', $e2 = ')')
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{
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if (is_array($d)) {
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$a = preg_split('#('.implode('|', $d).')#i', $str);
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$d = stripslashes($d[0]);
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} else {
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$a = explode($d, $str);
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}
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$i = 0;
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$term = array();
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foreach($a as $key=>$val) {
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if (empty($term[$i])) {
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$term[$i] = trim($val);
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$s1 = substr_count($term[$i], $e1);
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$s2 = substr_count($term[$i], $e2);
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if ($s1 == $s2) {
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$i++;
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}
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} else {
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$term[$i] .= $d . trim($val);
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$c1 = substr_count($term[$i], $e1);
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$c2 = substr_count($term[$i], $e2);
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if ($c1 == $c2) {
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$i++;
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}
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}
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}
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return $term;
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}
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/**
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* quoteExplode
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*
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* example:
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*
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* parameters:
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* $str = email LIKE 'John@example.com'
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* $d = ' LIKE '
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*
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* would return an array:
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* array("email", "LIKE", "'John@example.com'")
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*
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* @param string $str
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* @param string $d the delimeter which explodes the string
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*/
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public function quoteExplode($str, $d = ' ')
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{
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if (is_array($d)) {
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$a = preg_split('/('.implode('|', $d).')/', $str);
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$d = stripslashes($d[0]);
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} else {
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$a = explode($d, $str);
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}
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$i = 0;
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$term = array();
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foreach ($a as $key => $val) {
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if (empty($term[$i])) {
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$term[$i] = trim($val);
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if ( ! (substr_count($term[$i], "'") & 1)) {
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$i++;
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}
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} else {
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$term[$i] .= $d . trim($val);
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if ( ! (substr_count($term[$i], "'") & 1)) {
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$i++;
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}
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}
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}
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return $term;
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}
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/**
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* sqlExplode
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*
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* explodes a string into array using custom brackets and
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* quote delimeters
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*
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*
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* example:
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*
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* parameters:
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* $str = "(age < 20 AND age > 18) AND name LIKE 'John Doe'"
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* $d = ' '
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* $e1 = '('
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* $e2 = ')'
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*
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* would return an array:
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* array('(age < 20 AND age > 18)',
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* 'name',
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* 'LIKE',
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* 'John Doe')
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*
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* @param string $str
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* @param string $d the delimeter which explodes the string
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* @param string $e1 the first bracket, usually '('
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* @param string $e2 the second bracket, usually ')'
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*
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* @return array
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*/
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public function sqlExplode($str, $d = ' ', $e1 = '(', $e2 = ')')
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{
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if ($d == ' ') {
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$d = array(' ', '\s');
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}
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if (is_array($d)) {
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$d = array_map('preg_quote', $d);
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if (in_array(' ', $d)) {
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$d[] = '\s';
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}
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$split = '#(' . implode('|', $d) . ')#';
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$str = preg_split($split, $str);
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$d = stripslashes($d[0]);
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} else {
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$str = explode($d, $str);
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}
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$i = 0;
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$term = array();
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foreach ($str as $key => $val) {
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if (empty($term[$i])) {
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$term[$i] = trim($val);
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$s1 = substr_count($term[$i], $e1);
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$s2 = substr_count($term[$i], $e2);
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if (strpos($term[$i], '(') !== false) {
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if ($s1 == $s2) {
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$i++;
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}
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} else {
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if ( ! (substr_count($term[$i], "'") & 1) &&
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! (substr_count($term[$i], "\"") & 1)) {
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$i++;
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}
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}
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} else {
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$term[$i] .= $d . trim($val);
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$c1 = substr_count($term[$i], $e1);
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$c2 = substr_count($term[$i], $e2);
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if (strpos($term[$i], '(') !== false) {
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if ($c1 == $c2) {
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$i++;
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}
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} else {
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if ( ! (substr_count($term[$i], "'") & 1) &&
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! (substr_count($term[$i], "\"") & 1)) {
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$i++;
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}
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}
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}
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}
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return $term;
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}
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/**
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* clauseExplode
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*
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* explodes a string into array using custom brackets and
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* quote delimeters
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*
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*
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* example:
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*
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* parameters:
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* $str = "(age < 20 AND age > 18) AND name LIKE 'John Doe'"
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* $d = ' '
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* $e1 = '('
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* $e2 = ')'
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*
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* would return an array:
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* array('(age < 20 AND age > 18)',
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* 'name',
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* 'LIKE',
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* 'John Doe')
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*
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* @param string $str
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* @param string $d the delimeter which explodes the string
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* @param string $e1 the first bracket, usually '('
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* @param string $e2 the second bracket, usually ')'
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*
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* @return array
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*/
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public function clauseExplode($str, array $d, $e1 = '(', $e2 = ')')
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{
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if (is_array($d)) {
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$d = array_map('preg_quote', $d);
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if (in_array(' ', $d)) {
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$d[] = '\s';
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}
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$split = '#(' . implode('|', $d) . ')#';
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$str = preg_split($split, $str, -1, PREG_SPLIT_DELIM_CAPTURE);
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}
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$i = 0;
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$term = array();
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foreach ($str as $key => $val) {
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if ($key & 1) {
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if (isset($term[($i - 1)]) && ! is_array($term[($i - 1)])) {
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$term[($i - 1)] = array($term[($i - 1)], $val);
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}
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continue;
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}
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if (empty($term[$i])) {
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$term[$i] = $val;
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} else {
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$term[$i] .= $str[($key - 1)] . $val;
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}
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$c1 = substr_count($term[$i], $e1);
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$c2 = substr_count($term[$i], $e2);
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if (strpos($term[$i], '(') !== false) {
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if ($c1 == $c2) {
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$i++;
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}
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} else {
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if ( ! (substr_count($term[$i], "'") & 1) &&
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! (substr_count($term[$i], "\"") & 1)) {
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$i++;
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}
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}
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}
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$term[$i - 1] = array($term[$i - 1], '');
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return $term;
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}
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}
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