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<?php
/*
* Copyright 2010-2013 by MODX, LLC.
*
* This file is part of xPDO.
*
* xPDO is free software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any later
* version.
*
* xPDO is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* xPDO; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
* Suite 330, Boston, MA 02111-1307 USA
*/
/**
* A class for constructing complex SQL statements using a model-aware API.
*
* @package xpdo
* @subpackage om
*/
/**
* An xPDOCriteria derivative with methods for constructing complex statements.
*
* @abstract
* @package xpdo
* @subpackage om
*/
abstract class xPDOQuery extends xPDOCriteria {
const SQL_AND = 'AND';
const SQL_OR = 'OR';
const SQL_JOIN_CROSS = 'JOIN';
const SQL_JOIN_LEFT = 'LEFT JOIN';
const SQL_JOIN_RIGHT = 'RIGHT JOIN';
const SQL_JOIN_NATURAL_LEFT = 'NATURAL LEFT JOIN';
const SQL_JOIN_NATURAL_RIGHT = 'NATURAL RIGHT JOIN';
const SQL_JOIN_STRAIGHT = 'STRAIGHT_JOIN';
/**
* An array of symbols and keywords indicative of SQL operators.
*
* @var array
* @todo Refactor this to separate xPDOQuery operators from db-specific conditional statement identifiers.
*/
protected $_operators= array (
'=',
'!=',
'<',
'<=',
'>',
'>=',
'<=>',
' LIKE ',
' IS NULL',
' IS NOT NULL',
' BETWEEN ',
' IN ',
' IN(',
' NOT(',
' NOT (',
' NOT IN ',
' NOT IN(',
' EXISTS (',
' EXISTS(',
' NOT EXISTS (',
' NOT EXISTS(',
' COALESCE(',
' GREATEST(',
' INTERVAL(',
' LEAST(',
'MATCH(',
'MATCH (',
'MAX(',
'MIN(',
'AVG('
);
protected $_quotable= array ('string', 'password', 'date', 'datetime', 'timestamp', 'time');
protected $_class= null;
protected $_alias= null;
protected $_tableClass = null;
public $graph= array ();
public $query= array (
'command' => 'SELECT',
'distinct' => '',
'columns' => '',
'from' => array (
'tables' => array (),
'joins' => array (),
),
'set' => array (),
'where' => array (),
'groupby' => array (),
'having' => array (),
'orderby' => array (),
'offset' => '',
'limit' => '',
);
public function __construct(& $xpdo, $class, $criteria= null) {
parent :: __construct($xpdo);
if ($class= $this->xpdo->loadClass($class)) {
$this->_class= $class;
$this->_alias= $class;
$this->_tableClass = $this->xpdo->getTableClass($this->_class);
$this->query['from']['tables'][0]= array (
'table' => $this->xpdo->getTableName($this->_class),
'alias' => & $this->_alias
);
if ($criteria !== null) {
if (is_object($criteria)) {
$this->wrap($criteria);
}
else {
$this->where($criteria);
}
}
}
}
public function getClass() {
return $this->_class;
}
public function getAlias() {
return $this->_alias;
}
public function getTableClass() {
return $this->_tableClass;
}
/**
* Set the type of SQL command you want to build.
*
* The default is SELECT, though it also supports DELETE and UPDATE.
*
* @param string $command The type of SQL statement represented by this object. Default is 'SELECT'.
* @return xPDOQuery Returns the current object for convenience.
*/
public function command($command= 'SELECT') {
$command= strtoupper(trim($command));
if (preg_match('/(SELECT|UPDATE|DELETE)/', $command)) {
$this->query['command']= $command;
if (in_array($command, array('DELETE','UPDATE'))) $this->_alias= $this->xpdo->getTableName($this->_class);
}
return $this;
}
/**
* Set the DISTINCT attribute of the query.
*
* @param null|boolean $on Defines how to set the distinct attribute:
* - null (default) indicates the distinct attribute should be toggled
* - any other value is treated as a boolean, i.e. true to set DISTINCT, false to unset
* @return xPDOQuery Returns the current object for convenience.
*/
public function distinct($on = null) {
if ($on === null) {
if (empty($this->query['distinct']) || $this->query['distinct'] !== 'DISTINCT') {
$this->query['distinct']= 'DISTINCT';
} else {
$this->query['distinct']= '';
}
} else {
$this->query['distinct']= $on == true ? 'DISTINCT' : '';
}
return $this;
}
/**
* Sets a SQL alias for the table represented by the main class.
*
* @param string $alias An alias for the main table for the SQL statement.
* @return xPDOQuery Returns the current object for convenience.
*/
public function setClassAlias($alias= '') {
$this->_alias= $alias;
return $this;
}
/**
* Specify columns to return from the SQL query.
*
* @param string $columns Columns to return from the query.
* @return xPDOQuery Returns the current object for convenience.
*/
public function select($columns= '*') {
if (!is_array($columns)) {
$columns= trim($columns);
if ($columns == '*' || $columns === $this->_alias . '.*' || $columns === $this->xpdo->escape($this->_alias) . '.*') {
$columns= $this->xpdo->getSelectColumns($this->_class, $this->_alias, $this->_alias . '_');
}
$columns= explode(',', $columns);
foreach ($columns as $colKey => $column) $columns[$colKey] = trim($column);
}
if (is_array ($columns)) {
if (!is_array($this->query['columns'])) {
$this->query['columns']= $columns;
} else {
$this->query['columns']= array_merge($this->query['columns'], $columns);
}
}
return $this;
}
/**
* Specify the SET clause(s) for a SQL UPDATE query.
*
* @param array $values An associative array of fields and the values to set them to.
* @return xPDOQuery Returns a reference to the current instance for convenience.
*/
public function set(array $values) {
$fieldMeta= $this->xpdo->getFieldMeta($this->_class);
$fieldAliases= $this->xpdo->getFieldAliases($this->_class);
reset($values);
while (list($key, $value) = each($values)) {
$type= null;
if (!array_key_exists($key, $fieldMeta)) {
if (array_key_exists($key, $fieldAliases)) {
$key = $fieldAliases[$key];
} else {
continue;
}
}
if (array_key_exists($key, $fieldMeta)) {
if ($value === null) {
$type= PDO::PARAM_NULL;
}
elseif (!in_array($fieldMeta[$key]['phptype'], $this->_quotable)) {
$type= PDO::PARAM_INT;
}
elseif (strpos($value, '(') === false && !$this->isConditionalClause($value)) {
$type= PDO::PARAM_STR;
}
$this->query['set'][$key]= array('value' => $value, 'type' => $type);
}
}
return $this;
}
/**
* Join a table represented by the specified class.
*
* @param string $class The classname (or relation alias for aggregates and
* composites) of representing the table to be joined.
* @param string $alias An optional alias to represent the joined table in
* the constructed query.
* @param string $type The type of join to perform. See the xPDOQuery::SQL_JOIN
* constants.
* @param mixed $conditions Conditions of the join specified in any xPDO
* compatible criteria object or expression.
* @param string $conjunction A conjunction to be applied to the condition
* or conditions supplied.
* @param array $binding Optional bindings to accompany the conditions.
* @param int $condGroup An optional identifier for adding the conditions
* to a specific set of conjoined expressions.
* @return xPDOQuery Returns the current object for convenience.
*/
public function join($class, $alias= '', $type= xPDOQuery::SQL_JOIN_CROSS, $conditions= array (), $conjunction= xPDOQuery::SQL_AND, $binding= null, $condGroup= 0) {
if ($this->xpdo->loadClass($class)) {
$alias= $alias ? $alias : $class;
$target= & $this->query['from']['joins'];
$targetIdx= count($target);
$target[$targetIdx]= array (
'table' => $this->xpdo->getTableName($class),
'class' => $class,
'alias' => $alias,
'type' => $type,
'conditions' => array ()
);
if (empty ($conditions)) {
$fkMeta= $this->xpdo->getFKDefinition($this->_class, $alias);
if ($fkMeta) {
$parentAlias= isset ($this->_alias) ? $this->_alias : $this->_class;
$local= $fkMeta['local'];
$foreign= $fkMeta['foreign'];
$conditions= $this->xpdo->escape($parentAlias) . '.' . $this->xpdo->escape($local) . ' = ' . $this->xpdo->escape($alias) . '.' . $this->xpdo->escape($foreign);
if (isset($fkMeta['criteria']['local'])) {
$localCriteria = array();
if (is_array($fkMeta['criteria']['local'])) {
foreach ($fkMeta['criteria']['local'] as $critKey => $critVal) {
if (is_numeric($critKey)) {
$localCriteria[] = $critVal;
} else {
$localCriteria["{$this->_class}.{$critKey}"] = $critVal;
}
}
}
if (!empty($localCriteria)) {
$conditions = array($localCriteria, $conditions);
}
$foreignCriteria = array();
if (is_array($fkMeta['criteria']['foreign'])) {
foreach ($fkMeta['criteria']['foreign'] as $critKey => $critVal) {
if (is_numeric($critKey)) {
$foreignCriteria[] = $critVal;
} else {
$foreignCriteria["{$parentAlias}.{$critKey}"] = $critVal;
}
}
}
if (!empty($foreignCriteria)) {
$conditions = array($foreignCriteria, $conditions);
}
}
}
}
$this->condition($target[$targetIdx]['conditions'], $conditions, $conjunction, $binding, $condGroup);
}
return $this;
}
public function innerJoin($class, $alias= '', $conditions= array (), $conjunction= xPDOQuery::SQL_AND, $binding= null, $condGroup= 0) {
return $this->join($class, $alias, xPDOQuery::SQL_JOIN_CROSS, $conditions, $conjunction, $binding, $condGroup);
}
public function leftJoin($class, $alias= '', $conditions= array (), $conjunction= xPDOQuery::SQL_AND, $binding= null, $condGroup= 0) {
return $this->join($class, $alias, xPDOQuery::SQL_JOIN_LEFT, $conditions, $conjunction, $binding, $condGroup);
}
public function rightJoin($class, $alias= '', $conditions= array (), $conjunction= xPDOQuery::SQL_AND, $binding= null, $condGroup= 0) {
return $this->join($class, $alias, xPDOQuery::SQL_JOIN_RIGHT, $conditions, $conjunction, $binding, $condGroup);
}
/**
* Add a FROM clause to the query.
*
* @param string $class The class representing the table to add.
* @param string $alias An optional alias for the class.
* @return xPDOQuery Returns the instance.
*/
public function from($class, $alias= '') {
if ($class= $this->xpdo->loadClass($class)) {
$alias= $alias ? $alias : $class;
$this->query['from']['tables'][]= array (
'table' => $this->xpdo->getTableName($class),
'alias' => $alias
);
}
return $this;
}
/**
* Add a condition to the query.
*
* @param string $target The target clause for the condition.
* @param mixed $conditions A valid xPDO criteria expression.
* @param string $conjunction The conjunction to use when appending this condition, i.e., AND or OR.
* @param mixed $binding A value or PDO binding representation of a value for the condition.
* @param integer $condGroup A numeric identifier for associating conditions into groups.
* @return xPDOQuery Returns the instance.
*/
public function condition(& $target, $conditions= '1', $conjunction= xPDOQuery::SQL_AND, $binding= null, $condGroup= 0) {
$condGroup= intval($condGroup);
if (!isset ($target[$condGroup])) $target[$condGroup]= array ();
try {
$target[$condGroup][] = $this->parseConditions($conditions, $conjunction);
} catch (xPDOException $e) {
$this->xpdo->log(xPDO::LOG_LEVEL_ERROR, $e->getMessage());
$this->where("2=1");
}
return $this;
}
/**
* Add a WHERE condition to the query.
*
* @param mixed $conditions A valid xPDO criteria expression.
* @param string $conjunction The conjunction to use when appending this condition, i.e., AND or OR.
* @param mixed $binding A value or PDO binding representation of a value for the condition.
* @param integer $condGroup A numeric identifier for associating conditions into groups.
* @return xPDOQuery Returns the instance.
*/
public function where($conditions= '', $conjunction= xPDOQuery::SQL_AND, $binding= null, $condGroup= 0) {
$this->condition($this->query['where'], $conditions, $conjunction, $binding, $condGroup);
return $this;
}
public function andCondition($conditions, $binding= null, $group= 0) {
$this->where($conditions, xPDOQuery::SQL_AND, $binding, $group);
return $this;
}
public function orCondition($conditions, $binding= null, $group= 0) {
$this->where($conditions, xPDOQuery::SQL_OR, $binding, $group);
return $this;
}
/**
* Add an ORDER BY clause to the query.
*
* @param string $column Column identifier to sort by.
* @param string $direction The direction to sort by, ASC or DESC.
* @return xPDOQuery Returns the instance.
*/
public function sortby($column, $direction= 'ASC') {
$this->query['sortby'][]= array ('column' => $column, 'direction' => $direction);
return $this;
}
/**
* Add an GROUP BY clause to the query.
*
* @param string $column Column identifier to group by.
* @param string $direction The direction to sort by, ASC or DESC.
* @return xPDOQuery Returns the instance.
*/
public function groupby($column, $direction= '') {
$this->query['groupby'][]= array ('column' => $column, 'direction' => $direction);
return $this;
}
public function having($conditions) {
try {
$this->query['having'][] = $this->parseConditions((array)$conditions);
} catch (xPDOException $e) {
$this->xpdo->log(xPDO::LOG_LEVEL_ERROR, $e->getMessage());
$this->where("2=1");
}
return $this;
}
/**
* Add a LIMIT/OFFSET clause to the query.
*
* @param integer $limit The number of records to return.
* @param integer $offset The location in the result set to start from.
* @return xPDOQuery Returns the instance.
*/
public function limit($limit, $offset= 0) {
$this->query['limit']= $limit;
$this->query['offset']= $offset;
return $this;
}
/**
* Bind an object graph to the query.
*
* @param mixed $graph An array or JSON graph of related objects.
* @return xPDOQuery Returns the instance.
*/
public function bindGraph($graph) {
if (is_string($graph)) {
$graph= $this->xpdo->fromJSON($graph);
}
if (is_array ($graph)) {
if ($this->graph !== $graph) {
$this->graph= $graph;
$this->select($this->xpdo->getSelectColumns($this->_class, $this->_alias, $this->_alias . '_'));
foreach ($this->graph as $relationAlias => $subRelations) {
$this->bindGraphNode($this->_class, $this->_alias, $relationAlias, $subRelations);
}
if ($pk= $this->xpdo->getPK($this->_class)) {
if (is_array ($pk)) {
foreach ($pk as $key) {
$this->sortby($this->xpdo->escape($this->_alias) . '.' . $this->xpdo->escape($key), 'ASC');
}
} else {
$this->sortby($this->xpdo->escape($this->_alias) . '.' . $this->xpdo->escape($pk), 'ASC');
}
}
}
}
return $this;
}
/**
* Bind the node of an object graph to the query.
*
* @param string $parentClass The class representing the relation parent.
* @param string $parentAlias The alias the class is assuming.
* @param string $classAlias The class representing the related graph node.
* @param array $relations Child relations of the current graph node.
*/
public function bindGraphNode($parentClass, $parentAlias, $classAlias, $relations) {
if ($fkMeta= $this->xpdo->getFKDefinition($parentClass, $classAlias)) {
$class= $fkMeta['class'];
$local= $fkMeta['local'];
$foreign= $fkMeta['foreign'];
$this->select($this->xpdo->getSelectColumns($class, $classAlias, $classAlias . '_'));
$expression= $this->xpdo->escape($parentAlias) . '.' . $this->xpdo->escape($local) . ' = ' . $this->xpdo->escape($classAlias) . '.' . $this->xpdo->escape($foreign);
if (isset($fkMeta['criteria']['local'])) {
$localCriteria = array();
if (is_array($fkMeta['criteria']['local'])) {
foreach ($fkMeta['criteria']['local'] as $critKey => $critVal) {
if (is_numeric($critKey)) {
$localCriteria[] = $critVal;
} else {
$localCriteria["{$classAlias}.{$critKey}"] = $critVal;
}
}
}
if (!empty($localCriteria)) {
$expression = array($localCriteria, $expression);
}
$foreignCriteria = array();
if (is_array($fkMeta['criteria']['foreign'])) {
foreach ($fkMeta['criteria']['foreign'] as $critKey => $critVal) {
if (is_numeric($critKey)) {
$foreignCriteria[] = $critVal;
} else {
$foreignCriteria["{$parentAlias}.{$critKey}"] = $critVal;
}
}
}
if (!empty($foreignCriteria)) {
$expression = array($foreignCriteria, $expression);
}
}
$this->leftJoin($class, $classAlias, $expression);
if (!empty ($relations)) {
foreach ($relations as $relationAlias => $subRelations) {
$this->bindGraphNode($class, $classAlias, $relationAlias, $subRelations);
}
}
}
}
/**
* Hydrates a graph of related objects from a single result set.
*
* @param array|PDOStatement $rows A collection of result set rows or an
* executed PDOStatement to fetch rows from to hydrating the graph.
* @param bool $cacheFlag Indicates if the objects should be cached and
* optionally, by specifying an integer value, for how many seconds.
* @return array A collection of objects with all related objects from the
* graph pre-populated.
*/
public function hydrateGraph($rows, $cacheFlag = true) {
$instances= array ();
$collectionCaching = $this->xpdo->getOption(xPDO::OPT_CACHE_DB_COLLECTIONS, array(), 1);
if (is_object($rows)) {
if ($cacheFlag && $this->xpdo->_cacheEnabled && $collectionCaching > 0) {
$cacheRows = array();
}
while ($row = $rows->fetch(PDO::FETCH_ASSOC)) {
$this->hydrateGraphParent($instances, $row);
if ($cacheFlag && $this->xpdo->_cacheEnabled && $collectionCaching > 0) {
$cacheRows[]= $row;
}
}
if ($cacheFlag && $this->xpdo->_cacheEnabled && $collectionCaching > 0) {
$this->xpdo->toCache($this, $cacheRows, $cacheFlag);
}
} elseif (is_array($rows)) {
foreach ($rows as $row) {
$this->hydrateGraphParent($instances, $row);
}
}
return $instances;
}
public function hydrateGraphParent(& $instances, $row) {
$hydrated = false;
$instance = $this->xpdo->call($this->getClass(), '_loadInstance', array(& $this->xpdo, $this->getClass(), $this->getAlias(), $row));
if (is_object($instance)) {
$pk= $instance->getPrimaryKey();
if (is_array($pk)) $pk= implode('-', $pk);
if (isset ($instances[$pk])) {
$instance= & $instances[$pk];
}
foreach ($this->graph as $relationAlias => $subRelations) {
$this->hydrateGraphNode($row, $instance, $relationAlias, $subRelations);
}
$instances[$pk]= $instance;
$hydrated = true;
}
return $hydrated;
}
/**
* Hydrates a node of the object graph.
*
* @param array $row The result set representing the current node.
* @param xPDOObject $instance The xPDOObject instance to be hydrated from the node.
* @param string $alias The alias identifying the object in the parent relationship.
* @param array $relations Child relations of the current node.
*/
public function hydrateGraphNode(& $row, & $instance, $alias, $relations) {
$relObj= null;
if ($relationMeta= $instance->getFKDefinition($alias)) {
if ($row[$alias.'_'.$relationMeta['foreign']] != null) {
$relObj = $this->xpdo->call($relationMeta['class'], '_loadInstance', array(& $this->xpdo, $relationMeta['class'], $alias, $row));
if ($relObj) {
if (strtolower($relationMeta['cardinality']) == 'many') {
$instance->addMany($relObj, $alias);
} else {
$instance->addOne($relObj, $alias);
}
}
}
}
if (!empty ($relations) && is_object($relObj)) {
while (list($relationAlias, $subRelations)= each($relations)) {
if (is_array($subRelations) && !empty($subRelations)) {
foreach ($subRelations as $subRelation) {
$this->hydrateGraphNode($row, $relObj, $relationAlias, $subRelation);
}
} else {
$this->hydrateGraphNode($row, $relObj, $relationAlias, null);
}
}
}
}
/**
* Constructs the SQL query from the xPDOQuery definition.
*
* @return boolean Returns true if a SQL statement was successfully constructed.
*/
abstract public function construct();
/**
* Prepares the xPDOQuery for execution.
*
* @return PDOStatement The PDOStatement representing the prepared query.
*/
public function prepare($bindings= array (), $byValue= true, $cacheFlag= null) {
$this->stmt= null;
if ($this->construct() && $this->stmt= $this->xpdo->prepare($this->sql)) {
$this->bind($bindings, $byValue, $cacheFlag);
}
return $this->stmt;
}
/**
* Parses an xPDO condition expression into one or more xPDOQueryConditions.
*
* @param mixed $conditions A valid xPDO condition expression.
* @param string $conjunction The optional conjunction for the condition( s ).
* @return array||xPDOQueryCondition An xPDOQueryCondition or array of xPDOQueryConditions.
*/
public function parseConditions($conditions, $conjunction = xPDOQuery::SQL_AND) {
$result= array ();
$pk= $this->xpdo->getPK($this->_class);
$pktype= $this->xpdo->getPKType($this->_class);
$fieldMeta= $this->xpdo->getFieldMeta($this->_class, true);
$fieldAliases= $this->xpdo->getFieldAliases($this->_class);
$command= strtoupper($this->query['command']);
$alias= $command == 'SELECT' ? $this->_class : $this->xpdo->getTableName($this->_class, false);
$alias= trim($alias, $this->xpdo->_escapeCharOpen . $this->xpdo->_escapeCharClose);
if (is_array($conditions)) {
if (isset($conditions[0]) && is_scalar($conditions[0]) && !$this->isConditionalClause($conditions[0]) && is_array($pk) && count($conditions) == count($pk)) {
$iteration= 0;
foreach ($pk as $k) {
if (!isset ($conditions[$iteration])) {
$conditions[$iteration]= null;
}
$isString= in_array($fieldMeta[$k]['phptype'], $this->_quotable);
$field= array();
$field['sql']= $this->xpdo->escape($alias) . '.' . $this->xpdo->escape($k) . " = ?";
$field['binding']= array (
'value' => $conditions[$iteration],
'type' => $isString ? PDO::PARAM_STR : PDO::PARAM_INT,
'length' => 0
);
$field['conjunction']= $conjunction;
$result[$iteration]= new xPDOQueryCondition($field);
$iteration++;
}
} else {
reset($conditions);
while (list ($key, $val)= each($conditions)) {
if (is_int($key)) {
if (is_array($val)) {
$result[]= $this->parseConditions($val, $conjunction);
continue;
} elseif ($this->isConditionalClause($val)) {
$result[]= new xPDOQueryCondition(array('sql' => $val, 'binding' => null, 'conjunction' => $conjunction));
continue;
} else {
$this->xpdo->log(xPDO::LOG_LEVEL_ERROR, "Error parsing condition with key {$key}: " . print_r($val, true));
continue;
}
} elseif (is_scalar($val) || is_array($val) || $val === null) {
$alias= $command == 'SELECT' ? $this->_class : trim($this->xpdo->getTableName($this->_class, false), $this->xpdo->_escapeCharOpen . $this->xpdo->_escapeCharClose);
$operator= '=';
$conj = $conjunction;
$key_operator= explode(':', $key);
if ($key_operator && count($key_operator) === 2) {
$key= $key_operator[0];
$operator= $key_operator[1];
}
elseif ($key_operator && count($key_operator) === 3) {
$conj= $key_operator[0];
$key= $key_operator[1];
$operator= $key_operator[2];
}
if (strpos($key, '.') !== false) {
$key_parts= explode('.', $key);
$alias= trim($key_parts[0], " {$this->xpdo->_escapeCharOpen}{$this->xpdo->_escapeCharClose}");
$key= $key_parts[1];
}
if (!array_key_exists($key, $fieldMeta)) {
if (array_key_exists($key, $fieldAliases)) {
$key= $fieldAliases[$key];
} elseif ($this->isConditionalClause($key)) {
continue;
}
}
if (!empty($key)) {
if ($val === null) {
$type= PDO::PARAM_NULL;
if (!in_array($operator, array('IS', 'IS NOT'))) {
$operator= $operator === '!=' ? 'IS NOT' : 'IS';
}
}
elseif (isset($fieldMeta[$key]) && !in_array($fieldMeta[$key]['phptype'], $this->_quotable)) {
$type= PDO::PARAM_INT;
}
else {
$type= PDO::PARAM_STR;
}
if (in_array(strtoupper($operator), array('IN', 'NOT IN')) && is_array($val)) {
$vals = array();
foreach ($val as $v) {
if ($v === null) {
$vals[] = null;
} else {
switch ($type) {
case PDO::PARAM_INT:
$vals[] = (integer) $v;
break;
case PDO::PARAM_STR:
$vals[] = $this->xpdo->quote($v);
break;
default:
$this->xpdo->log(xPDO::LOG_LEVEL_ERROR, "Error parsing {$operator} condition with key {$key}: " . print_r($v, true));
break;
}
}
}
if (empty($vals)) {
$this->xpdo->log(xPDO::LOG_LEVEL_ERROR, "Encountered empty {$operator} condition with key {$key}");
}
$val = "(" . implode(',', $vals) . ")";
$sql = "{$this->xpdo->escape($alias)}.{$this->xpdo->escape($key)} {$operator} {$val}";
$result[]= new xPDOQueryCondition(array('sql' => $sql, 'binding' => null, 'conjunction' => $conj));
continue;
}
$field= array ();
$field['sql']= $this->xpdo->escape($alias) . '.' . $this->xpdo->escape($key) . ' ' . $operator . ' ?';
$field['binding']= array (
'value' => $val,
'type' => $type,
'length' => 0
);
$field['conjunction']= $conj;
$result[]= new xPDOQueryCondition($field);
} else {
throw new xPDOException("Invalid query expression");
}
}
}
}
}
elseif ($this->isConditionalClause($conditions)) {
$result= new xPDOQueryCondition(array(
'sql' => $conditions
,'binding' => null
,'conjunction' => $conjunction
));
}
elseif (($pktype == 'integer' && is_numeric($conditions)) || ($pktype == 'string' && is_string($conditions) && $this->isValidClause($conditions))) {
if ($pktype == 'integer') {
$param_type= PDO::PARAM_INT;
} else {
$param_type= PDO::PARAM_STR;
}
$field['sql']= $this->xpdo->escape($alias) . '.' . $this->xpdo->escape($pk) . ' = ?';
$field['binding']= array ('value' => $conditions, 'type' => $param_type, 'length' => 0);
$field['conjunction']= $conjunction;
$result = new xPDOQueryCondition($field);
}
return $result;
}
/**
* Determines if a string contains a conditional operator.
*
* @param string $string The string to evaluate.
* @return boolean True if the string is a complete conditional SQL clause.
*/
public function isConditionalClause($string) {
$matched= false;
if (is_string($string)) {
if (!$this->isValidClause($string)) {
throw new xPDOException("SQL injection attempt detected: {$string}");
}
foreach ($this->_operators as $operator) {
if (strpos(strtoupper($string), $operator) !== false) {
$matched= true;
break;
}
}
}
return $matched;
}
protected function isValidClause($clause) {
$output = rtrim($clause, ' ;');
$output = preg_replace("/\\\\'.*?\\\\'/", '{mask}', $output);
$output = preg_replace('/\\".*?\\"/', '{mask}', $output);
$output = preg_replace("/'.*?'/", '{mask}', $output);
$output = preg_replace('/".*?"/', '{mask}', $output);
return strpos($output, ';') === false && strpos(strtolower($output), 'union') === false;
}
/**
* Builds conditional clauses from xPDO condition expressions.
*
* @param array|xPDOQueryCondition $conditions An array of conditions or an xPDOQueryCondition instance.
* @param string $conjunction Either xPDOQuery:SQL_AND or xPDOQuery::SQL_OR
* @param boolean $isFirst Indicates if this is the first condition in an array.
* @return string The generated SQL clause.
*/
public function buildConditionalClause($conditions, & $conjunction = xPDOQuery::SQL_AND, $isFirst = true) {
$clause= '';
if (is_array($conditions)) {
$groups= count($conditions);
$currentGroup= 1;
$first = true;
$origConjunction = $conjunction;
$groupConjunction = $conjunction;
foreach ($conditions as $groupKey => $group) {
$groupClause = '';
$groupClause.= $this->buildConditionalClause($group, $groupConjunction, $first);
if ($first) {
$conjunction = $groupConjunction;
}
if (!empty($groupClause)) $clause.= $groupClause;
$currentGroup++;
$first = false;
}
$conjunction = $origConjunction;
if ($groups > 1 && !empty($clause)) {
$clause = " ( {$clause} ) ";
}
if (!$isFirst && !empty($clause)) {
$clause = ' ' . $groupConjunction . ' ' . $clause;
}
} elseif (is_object($conditions) && $conditions instanceof xPDOQueryCondition) {
if ($isFirst) {
$conjunction = $conditions->conjunction;
} else {
$clause.= ' ' . $conditions->conjunction . ' ';
}
$clause.= $conditions->sql;
if (!empty ($conditions->binding)) {
$this->bindings[]= $conditions->binding;
}
}
if ($this->xpdo->getDebug() === true) {
$this->xpdo->log(xPDO::LOG_LEVEL_DEBUG, "Returning clause:\n{$clause}\nfrom conditions:\n" . print_r($conditions, 1));
}
return $clause;
}
/**
* Wrap an existing xPDOCriteria into this xPDOQuery instance.
*
* @param xPDOCriteria $criteria
*/
public function wrap($criteria) {
if ($criteria instanceof xPDOQuery) {
$this->_class= $criteria->_class;
$this->_alias= $criteria->_alias;
$this->graph= $criteria->graph;
$this->query= $criteria->query;
}
$this->sql= $criteria->sql;
$this->stmt= $criteria->stmt;
$this->bindings= $criteria->bindings;
$this->cacheFlag= $criteria->cacheFlag;
}
}
/**
* Abstracts individual query conditions used in xPDOQuery instances.
*
* @package xpdo
* @subpackage om
*/
class xPDOQueryCondition {
/**
* @var string The SQL string for the condition.
*/
public $sql = '';
/**
* @var array An array of value/parameter bindings for the condition.
*/
public $binding = array();
/**
* @var string The conjunction identifying how the condition is related to the previous condition(s).
*/
public $conjunction = xPDOQuery::SQL_AND;
/**
* The constructor for creating an xPDOQueryCondition instance.
*
* @param array $properties An array of properties representing the condition.
*/
public function __construct(array $properties) {
if (isset($properties['sql'])) $this->sql = $properties['sql'];
if (isset($properties['binding'])) $this->binding = $properties['binding'];
if (isset($properties['conjunction'])) $this->conjunction = $properties['conjunction'];
}
}