Extended.php
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Extended.php
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	<?php
	// +----------------------------------------------------------------------+
	// \| PHP versions 4 and 5 \|
	// +----------------------------------------------------------------------+
	// \| Copyright (c) 1998-2004 Manuel Lemos, Tomas V.V.Cox, \|
	// \| Stig. S. Bakken, Lukas Smith \|
	// \| All rights reserved. \|
	// +----------------------------------------------------------------------+
	// \| MDB2 is a merge of PEAR DB and Metabases that provides a unified DB \|
	// \| API as well as database abstraction for PHP applications. \|
	// \| This LICENSE is in the BSD license style. \|
	// \| \|
	// \| Redistribution and use in source and binary forms, with or without \|
	// \| modification, are permitted provided that the following conditions \|
	// \| are met: \|
	// \| \|
	// \| Redistributions of source code must retain the above copyright \|
	// \| notice, this list of conditions and the following disclaimer. \|
	// \| \|
	// \| Redistributions in binary form must reproduce the above copyright \|
	// \| notice, this list of conditions and the following disclaimer in the \|
	// \| documentation and/or other materials provided with the distribution. \|
	// \| \|
	// \| Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, \|
	// \| Lukas Smith nor the names of his contributors may be used to endorse \|
	// \| or promote products derived from this software without specific prior\|
	// \| written permission. \|
	// \| \|
	// \| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \|
	// \| "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT \|
	// \| LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS \|
	// \| FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE \|
	// \| REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, \|
	// \| INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, \|
	// \| BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS\|
	// \| OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED \|
	// \| AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT \|
	// \| LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY\|
	// \| WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE \|
	// \| POSSIBILITY OF SUCH DAMAGE. \|
	// +----------------------------------------------------------------------+
	// \| Author: Lukas Smith <smith@pooteeweet.org> \|
	// +----------------------------------------------------------------------+
	//
	// $Id$

	/**
	* @package MDB2
	* @category Database
	* @author Lukas Smith <smith@pooteeweet.org>
	*/

	/**
	* Used by autoPrepare()
	*/
	define('MDB2_AUTOQUERY_INSERT', 1);
	define('MDB2_AUTOQUERY_UPDATE', 2);

	/**
	* MDB2_Extended: class which adds several high level methods to MDB2
	*
	* @package MDB2
	* @category Database
	* @author Lukas Smith <smith@pooteeweet.org>
	*/
	class MDB2_Extended extends MDB2_Module_Common
	{
	// }}}
	// {{{ autoPrepare()

	/**
	* Make automaticaly an insert or update query and call prepare() with it
	*
	* @param string $table name of the table
	* @param array $table_fields ordered array containing the fields names
	* @param int $mode type of query to make (MDB2_AUTOQUERY_INSERT or MDB2_AUTOQUERY_UPDATE)
	* @param string $where in case of update queries, this string will be put after the sql WHERE statement
	* @return resource handle for the query
	* @param mixed $types array that contains the types of the placeholders
	* @param mixed $result_types array that contains the types of the columns in
	* the result set
	* @see buildManipSQL
	* @access public
	*/
	function autoPrepare($table, $table_fields, $mode = MDB2_AUTOQUERY_INSERT,
	$where = false, $types = null, $result_types = null)
	{
	$query = $this->buildManipSQL($table, $table_fields, $mode, $where);
	if (PEAR::isError($query)) {
	return $query;
	}
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	return $db->prepare($query, $types, $result_types);
	}

	// {{{
	// }}} autoExecute()

	/**
	* Make automaticaly an insert or update query and call prepare() and execute() with it
	*
	* @param string $table name of the table
	* @param array $fields_values assoc ($key=>$value) where $key is a field name and $value its value
	* @param int $mode type of query to make (MDB2_AUTOQUERY_INSERT or MDB2_AUTOQUERY_UPDATE)
	* @param string $where in case of update queries, this string will be put after the sql WHERE statement
	* @param mixed $types array that contains the types of the placeholders
	* @param mixed $result_types array that contains the types of the columns in
	* the result set
	* @param mixed $result_class string which specifies which result class to use
	* @return mixed a new MDB2_Result or a MDB2 Error Object when fail
	* @see buildManipSQL
	* @see autoPrepare
	* @access public
	*/
	function &autoExecute($table, $fields_values, $mode = MDB2_AUTOQUERY_INSERT,
	$where = false, $types = null, $result_types = null, $result_class = true)
	{
	$stmt = $this->autoPrepare($table, array_keys($fields_values), $mode, $where, $types, $result_types);
	if (PEAR::isError($stmt)) {
	return $stmt;
	}
	$params = array_values($fields_values);
	$stmt->bindParamArray($params);
	$result =& $stmt->execute($result_class);
	$stmt->free();
	return $result;
	}

	// {{{
	// }}} buildManipSQL()

	/**
	* Make automaticaly an sql query for prepare()
	*
	* Example : buildManipSQL('table_sql', array('field1', 'field2', 'field3'), MDB2_AUTOQUERY_INSERT)
	* will return the string : INSERT INTO table_sql (field1,field2,field3) VALUES (?,?,?)
	* NB : - This belongs more to a SQL Builder class, but this is a simple facility
	* - Be carefull ! If you don't give a $where param with an UPDATE query, all
	* the records of the table will be updated !
	*
	* @param string $table name of the table
	* @param array $table_fields ordered array containing the fields names
	* @param int $mode type of query to make (MDB2_AUTOQUERY_INSERT or MDB2_AUTOQUERY_UPDATE)
	* @param string $where in case of update queries, this string will be put after the sql WHERE statement
	* @return string sql query for prepare()
	* @access public
	*/
	function buildManipSQL($table, $table_fields, $mode, $where = false)
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	if (count($table_fields) == 0) {
	return $db->raiseError(MDB2_ERROR_NEED_MORE_DATA);
	}
	switch ($mode) {
	case MDB2_AUTOQUERY_INSERT:
	$cols = implode(', ', $table_fields);
	$values = '?'.str_repeat(', ?', count($table_fields)-1);
	return 'INSERT INTO '.$table.' ('.$cols.') VALUES ('.$values.')';
	break;
	case MDB2_AUTOQUERY_UPDATE:
	$set = implode(' = ?, ', $table_fields).' = ?';
	$sql = 'UPDATE '.$table.' SET '.$set;
	if ($where !== false) {
	$sql.= ' WHERE '.$where;
	}
	return $sql;
	break;
	}
	return $db->raiseError(MDB2_ERROR_SYNTAX);
	}

	// {{{
	// }}} limitQuery()

	/**
	* Generates a limited query
	*
	* @param string $query query
	* @param mixed $types array that contains the types of the columns in
	* the result set
	* @param integer $from the row to start to fetching
	* @param integer $count the numbers of rows to fetch
	* @param mixed $result_class string which specifies which result class to use
	* @return mixed a valid ressource pointer or a MDB2 Error Object
	* @access public
	*/
	function &limitQuery($query, $types, $count, $from = 0, $result_class = true)
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	$result = $db->setLimit($count, $from);
	if (PEAR::isError($result)) {
	return $result;
	}
	$result =& $db->query($query, $types, $result_class);
	return $result;
	}

	// {{{
	// }}} getOne()

	/**
	* Fetch the first column of the first row of data returned from
	* a query. Takes care of doing the query and freeing the results
	* when finished.
	*
	* @param string $query the SQL query
	* @param string $type string that contains the type of the column in the
	* result set
	* @param array $params if supplied, prepare/execute will be used
	* with this array as execute parameters
	* @param array $param_types array that contains the types of the values
	* defined in $params
	* @param mixed $colnum which column to return
	* @return mixed MDB2_OK or data on success, a MDB2 error on failure
	* @access public
	*/
	function getOne($query, $type = null, $params = array(),
	$param_types = null, $colnum = 0)
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	settype($params, 'array');
	settype($type, 'array');
	if (count($params) == 0) {
	return $db->queryOne($query, $type, $colnum);
	}

	$stmt = $db->prepare($query, $param_types, $type);
	if (PEAR::isError($stmt)) {
	return $stmt;
	}

	$stmt->bindParamArray($params);
	$result = $stmt->execute();
	if (!MDB2::isResultCommon($result)) {
	return $result;
	}

	$one = $result->fetchOne($colnum);
	$stmt->free();
	$result->free();
	return $one;
	}

	// }}}
	// {{{ getRow()

	/**
	* Fetch the first row of data returned from a query. Takes care
	* of doing the query and freeing the results when finished.
	*
	* @param string $query the SQL query
	* @param array $types array that contains the types of the columns in
	* the result set
	* @param array $params array if supplied, prepare/execute will be used
	* with this array as execute parameters
	* @param array $param_types array that contains the types of the values
	* defined in $params
	* @param integer $fetchmode the fetch mode to use
	* @return mixed MDB2_OK or data array on success, a MDB2 error on failure
	* @access public
	*/
	function getRow($query, $types = null, $params = array(),
	$param_types = null, $fetchmode = MDB2_FETCHMODE_DEFAULT)
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	settype($params, 'array');
	if (count($params) == 0) {
	return $db->queryRow($query, $types, $fetchmode);
	}

	$stmt = $db->prepare($query, $param_types, $types);
	if (PEAR::isError($stmt)) {
	return $stmt;
	}

	$stmt->bindParamArray($params);
	$result = $stmt->execute();
	if (!MDB2::isResultCommon($result)) {
	return $result;
	}

	$row = $result->fetchRow($fetchmode);
	$stmt->free();
	$result->free();
	return $row;
	}

	// }}}
	// {{{ getCol()

	/**
	* Fetch a single column from a result set and return it as an
	* indexed array.
	*
	* @param string $query the SQL query
	* @param string $type string that contains the type of the column in the
	* result set
	* @param array $params array if supplied, prepare/execute will be used
	* with this array as execute parameters
	* @param array $param_types array that contains the types of the values
	* defined in $params
	* @param mixed $colnum which column to return
	* @return mixed MDB2_OK or data array on success, a MDB2 error on failure
	* @access public
	*/
	function getCol($query, $type = null, $params = array(),
	$param_types = null, $colnum = 0)
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	settype($params, 'array');
	settype($type, 'array');
	if (count($params) == 0) {
	return $db->queryCol($query, $type, $colnum);
	}

	$stmt = $db->prepare($query, $param_types, $type);
	if (PEAR::isError($stmt)) {
	return $stmt;
	}

	$stmt->bindParamArray($params);
	$result = $stmt->execute();
	if (!MDB2::isResultCommon($result)) {
	return $result;
	}

	$col = $result->fetchCol($colnum);
	$stmt->free();
	$result->free();
	return $col;
	}

	// }}}
	// {{{ getAll()

	/**
	* Fetch all the rows returned from a query.
	*
	* @param string $query the SQL query
	* @param array $types array that contains the types of the columns in
	* the result set
	* @param array $params array if supplied, prepare/execute will be used
	* with this array as execute parameters
	* @param array $param_types array that contains the types of the values
	* defined in $params
	* @param integer $fetchmode the fetch mode to use
	* @param boolean $rekey if set to true, the $all will have the first
	* column as its first dimension
	* @param boolean $force_array used only when the query returns exactly
	* two columns. If true, the values of the returned array will be
	* one-element arrays instead of scalars.
	* @param boolean $group if true, the values of the returned array is
	* wrapped in another array. If the same key value (in the first
	* column) repeats itself, the values will be appended to this array
	* instead of overwriting the existing values.
	* @return mixed MDB2_OK or data array on success, a MDB2 error on failure
	* @access public
	*/
	function getAll($query, $types = null, $params = array(),
	$param_types = null, $fetchmode = MDB2_FETCHMODE_DEFAULT,
	$rekey = false, $force_array = false, $group = false)
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	settype($params, 'array');
	if (count($params) == 0) {
	return $db->queryAll($query, $types, $fetchmode, $rekey, $force_array, $group);
	}

	$stmt = $db->prepare($query, $param_types, $types);
	if (PEAR::isError($stmt)) {
	return $stmt;
	}

	$stmt->bindParamArray($params);
	$result = $stmt->execute();
	if (!MDB2::isResultCommon($result)) {
	return $result;
	}

	$all = $result->fetchAll($fetchmode, $rekey, $force_array, $group);
	$stmt->free();
	$result->free();
	return $all;
	}

	// }}}
	// {{{ getAssoc()

	/**
	* Fetch the entire result set of a query and return it as an
	* associative array using the first column as the key.
	*
	* If the result set contains more than two columns, the value
	* will be an array of the values from column 2-n. If the result
	* set contains only two columns, the returned value will be a
	* scalar with the value of the second column (unless forced to an
	* array with the $force_array parameter). A MDB error code is
	* returned on errors. If the result set contains fewer than two
	* columns, a MDB2_ERROR_TRUNCATED error is returned.
	*
	* For example, if the table 'mytable' contains:
	*
	* ID TEXT DATE
	* --------------------------------
	* 1 'one' 944679408
	* 2 'two' 944679408
	* 3 'three' 944679408
	*
	* Then the call getAssoc('SELECT id,text FROM mytable') returns:
	* array(
	* '1' => 'one',
	* '2' => 'two',
	* '3' => 'three',
	* )
	*
	* ...while the call getAssoc('SELECT id,text,date FROM mytable') returns:
	* array(
	* '1' => array('one', '944679408'),
	* '2' => array('two', '944679408'),
	* '3' => array('three', '944679408')
	* )
	*
	* If the more than one row occurs with the same value in the
	* first column, the last row overwrites all previous ones by
	* default. Use the $group parameter if you don't want to
	* overwrite like this. Example:
	*
	* getAssoc('SELECT category,id,name FROM mytable', null, null
	* MDB2_FETCHMODE_ASSOC, false, true) returns:
	* array(
	* '1' => array(array('id' => '4', 'name' => 'number four'),
	* array('id' => '6', 'name' => 'number six')
	* ),
	* '9' => array(array('id' => '4', 'name' => 'number four'),
	* array('id' => '6', 'name' => 'number six')
	* )
	* )
	*
	* Keep in mind that database functions in PHP usually return string
	* values for results regardless of the database's internal type.
	*
	* @param string $query the SQL query
	* @param array $types array that contains the types of the columns in
	* the result set
	* @param array $params array if supplied, prepare/execute will be used
	* with this array as execute parameters
	* @param array $param_types array that contains the types of the values
	* defined in $params
	* @param boolean $force_array used only when the query returns
	* exactly two columns. If TRUE, the values of the returned array
	* will be one-element arrays instead of scalars.
	* @param boolean $group if TRUE, the values of the returned array
	* is wrapped in another array. If the same key value (in the first
	* column) repeats itself, the values will be appended to this array
	* instead of overwriting the existing values.
	* @return array associative array with results from the query.
	* @access public
	*/
	function getAssoc($query, $types = null, $params = array(), $param_types = null,
	$fetchmode = MDB2_FETCHMODE_DEFAULT, $force_array = false, $group = false)
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	settype($params, 'array');
	if (count($params) == 0) {
	return $db->queryAll($query, $types, $fetchmode, true, $force_array, $group);
	}

	$stmt = $db->prepare($query, $param_types, $types);
	if (PEAR::isError($stmt)) {
	return $stmt;
	}

	$stmt->bindParamArray($params);
	$result = $stmt->execute();
	if (!MDB2::isResultCommon($result)) {
	return $result;
	}

	$all = $result->fetchAll($fetchmode, true, $force_array, $group);
	$stmt->free();
	$result->free();
	return $all;
	}

	// }}}
	// {{{ executeMultiple()

	/**
	* This function does several execute() calls on the same statement handle.
	* $params must be an array indexed numerically from 0, one execute call is
	* done for every 'row' in the array.
	*
	* If an error occurs during execute(), executeMultiple() does not execute
	* the unfinished rows, but rather returns that error.
	*
	* @param resource $stmt query handle from prepare()
	* @param array $params numeric array containing the
	* data to insert into the query
	* @return mixed a result handle or MDB2_OK on success, a MDB2 error on failure
	* @access public
	* @see prepare(), execute()
	*/
	function executeMultiple(&$stmt, $params = null)
	{
	for ($i = 0, $j = count($params); $i < $j; $i++) {
	$stmt->bindParamArray($params[$i]);
	$result = $stmt->execute();
	if (PEAR::isError($result)) {
	return $result;
	}
	}
	return MDB2_OK;
	}

	// }}}
	// {{{ getBeforeID()

	/**
	* returns the next free id of a sequence if the RDBMS
	* does not support auto increment
	*
	* @param string $table name of the table into which a new row was inserted
	* @param boolean $ondemand when true the seqence is
	* automatic created, if it
	* not exists
	*
	* @return mixed MDB2 Error Object or id
	* @access public
	*/
	function getBeforeID($table, $field, $ondemand = true)
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	if ($db->supports('auto_increment') !== true) {
	$seq = $table.(empty($field) ? '' : '_'.$field);
	$id = $db->nextID($seq, $ondemand);
	if (PEAR::isError($id)) {
	return $id;
	}
	return $db->quote($id, 'integer');
	}
	return 'NULL';
	}

	// }}}
	// {{{ getAfterID()

	/**
	* returns the autoincrement ID if supported or $id
	*
	* @param mixed $id value as returned by getBeforeId()
	* @param string $table name of the table into which a new row was inserted
	* @return mixed MDB2 Error Object or id
	* @access public
	*/
	function getAfterID($id, $table, $field)
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	if ($db->supports('auto_increment') !== true) {
	return $id;
	}
	return $db->lastInsertID($table, $field);
	}

	}
	?>

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