OpenSQLManager/sys/db/query_builder.php

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<?php
/**
* OpenSQLManager
*
* Free Database manager for Open Source Databases
*
* @author Timothy J. Warren
* @copyright Copyright (c) 2012
* @link https://github.com/aviat4ion/OpenSQLManager
* @license http://philsturgeon.co.uk/code/dbad-license
*/
// --------------------------------------------------------------------------
/**
* Convienience class for creating sql queries - also the class that
* instantiates the specific db driver
*/
class Query_Builder {
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private $table, $where_array, $sql;
/**
* Constructor
*
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* @param object $conn_name - the name of the connection/parameters
*/
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public function __construct($params)
{
$params->type = strtolower($params->type);
$dbtype = ($params->type !== 'postgresql') ? $params->type : 'pgsql';
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// Initiate the constructor for the selected database
switch($dbtype)
{
default:
$this->db = new $dbtype("host={$params->host};port={$params->port};", $params->user, $params->pass);
break;
case "sqlite":
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if ( ! empty($params->user) && ! empty($params->pass))
{
$this->db = new $dbtype($params->file, $params->user, $params->pass);
}
else
{
$this->db = new $dbtype($params->file);
}
break;
case "firebird":
$this->db = new $dbtype("{$params->host}:{$params->file}", $params->user, $params->pass);
break;
}
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// Make things just slightly shorter
$this->sql =& $this->db->sql;
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}
// --------------------------------------------------------------------------
/**
* Select and retrieve all records from the current table, and/or
* execute current compiled query
*
* @param $table
* @param int $limit
* @param int $offset
* @return object
*/
public function get($table='', $limit=FALSE, $offset=FALSE)
{
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// @todo Only add in the table name when using the select method
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// @todo Only execute combined query when using other query methods and empty parameters
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$sql = 'SELECT * FROM ' . $this->db->quote_ident($table);
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if ( ! empty($table) && $limit === FALSE && $offset === FALSE)
{
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$result = $this->db->query($sql);
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}
else
{
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$sql = $this->sql->limit($sql, $limit, $offset);
$result = $this->db->query($sql);
}
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//echo $sql."<br />";
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return $result;
}
// --------------------------------------------------------------------------
/**
* Specifies rows to select in a query
*
* @param string $fields
* @return $this
*/
public function select($fields)
{
// @todo Implement select method
return $this;
}
// --------------------------------------------------------------------------
/**
* Specify condition(s) in the where clause of a query
* Note: this function works with key / value, or a
* passed array with key / value pairs
*
* @param mixed $key
* @param mixed $val
* @return $this
*/
public function where($key, $val=array())
{
// @todo Implement where method
return $this;
}
// --------------------------------------------------------------------------
/**
* Creates a join phrase in a compiled query
*
* @param string $table
* @param string $condition
* @param string $type
* @return $this
*/
public function join($table, $condition, $type='inner')
{
// @todo Implement join method
return $this;
}
// --------------------------------------------------------------------------
/**
* Specify the database table to select from
*
* @param string $dbname
* @return $this
*/
public function from($dbname)
{
// @todo Implement from method
return $this;
}
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// --------------------------------------------------------------------------
/**
* String together the sql statements for sending to the db
*
* @return $string
*/
private function _compile()
{
// @todo Implement _compile method
}
}