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<?php
namespace Shibboleth;
use \Database;
/**
* A database store. Used interact with the database - save objects, run queries.
*
* One store = one table.
*
* @license see /license.txt
* @author Laurent Opprecht <laurent@opprecht.info>, Nicolas Rod for the University of Geneva
*/
class Store
{
/**
*
* @return Store
*/
public static function create($table_name, $class_name = '', $id_name = 'id', $db_name = '')
{
return new self($table_name, $class_name, $id_name, $db_name);
}
protected $db_name = '';
protected $table_name = '';
protected $id_name = '';
protected $class_name = '';
function __construct($table_name, $class_name = '', $id_name = 'id', $db_name = '')
{
$this->db_name = $db_name ? $db_name : Database::get_main_database();
$this->table_name = $table_name;
$this->class_name = $class_name;
$this->id_name = $id_name;
}
function get_db_name($object = '')
{
if ($this->db_name)
{
return $this->db_name;
}
if ($object)
{
$result = isset($object->{db_name}) ? $object->{db_name} : '';
$result = $result ? $result : Database :: get_main_database();
return $result;
}
return Database::get_main_database();
}
function get($w)
{
$args = func_get_args();
$f = array($this, 'get_where');
$db_name = $this->get_db_name();
$where = call_user_func_array($f, $args);
$sql = "SELECT *
FROM `{$db_name}`.`{$this->table_name}`
WHERE $where";
$items = $this->query($sql);
return (count($items) == 1) ? reset($items) : null;
}
function select($w)
{
$args = func_get_args();
$f = array($this, 'get_where');
$db_name = $this->get_db_name();
$where = call_user_func_array($f, $args);
$sql = "SELECT *
FROM `{$db_name}`.`{$this->table_name}`
WHERE $where";
$result = $this->query($sql);
return $result;
}
function exist($w)
{
$args = func_get_args();
$f = array($this, 'get');
$object = call_user_func_array($f, $args);
return !empty($object);
}
function is_new($object)
{
$id_name = $this->id_name;
$id = isset($object->{$id_name}) ? $object->{$id_name} : false;
return empty($id);
}
function save($object)
{
if (empty($object))
{
return false;
}
$object = is_array($object) ? $this->create_object($object) : $object;
$this->before_save($object);
if ($this->is_new($object))
{
$result = $this->insert($object);
}
else
{
$result = $this->update($object);
}
return $result;
}
function delete($object)
{
$args = func_get_args();
$f = array($this, 'get_where');
$db_name = $this->get_db_name();
$where = call_user_func_array($f, $args);
$sql = "DELETE
FROM `{$db_name
}
`.`{$this->table_name
}
`
WHERE $where";
$result = $this->query($sql);
return $result;
}
/**
*
* @param array|object $data
* @return object
*/
public function create_object($data = array())
{
$data = $data ? $data : array();
$data = (object) $data;
$class = $this->class_name;
if (empty($class))
{
return clone $data;
}
$result = new $class();
foreach ($result as $key => $value)
{
$result->{$key} = property_exists($data, $key) ? $data->{$key} : null;
}
return $result;
}
public function fields($object)
{
static $result = array();
if (!empty($result))
{
return $result;
}
$db_name = $this->get_db_name($object);
$sql = "SELECT *
FROM `{$db_name}`.`{$this->table_name}`
LIMIT 1";
$rs = Database::query($sql, null, __FILE__);
while ($field = mysql_fetch_field($rs))
{
$result[] = $field;
}
return $result;
}
protected function before_save($object)
{
//hook
}
protected function update($object)
{
$id = isset($object->{$this->id_name}) ? $object->{$this->id_name} : false;
if (empty($id))
{
return false;
}
$items = array();
$fields = $this->fields($object);
foreach ($fields as $field)
{
$name = $field->name;
if ($name != $this->id_name)
{
if (property_exists($object, $name))
{
$value = $object->{$name};
$value = $this->format_value($value);
$items[] = "$name=$value";
}
}
}
$db_name = $this->get_db_name($object);
$sql = "UPDATE `{$db_name}`.`{$this->table_name}` SET ";
$sql .= join(', ', $items);
$sql .= " WHERE {$this->id_name}=$id";
$result = $this->execute($sql);
if ($result)
{
$object->{db_name} = $db_name;
}
return (bool) $result;
}
protected function insert($object)
{
$id = isset($object->{$this->id_name}) ? $object->{$this->id_name} : false;
if (empty($object))
{
return false;
}
$values = array();
$keys = array();
$fields = $this->fields($object);
foreach ($fields as $field)
{
$name = $field->name;
if ($name != $this->id_name)
{
if (property_exists($object, $name))
{
$value = $object->{$name};
$value = is_null($value) ? 'DEFAULT' : $this->format_value($value);
$values[] = $value;
$keys[] = $name;
}
}
}
$db_name = $this->get_db_name($object);
$sql = "INSERT INTO `{$db_name}`.`{$this->table_name}` ";
$sql .= ' (' . join(', ', $keys) . ') ';
$sql .= 'VALUES';
$sql .= ' (' . join(', ', $values) . ') ';
$result = $this->execute($sql);
if ($result)
{
$id = mysql_insert_id();
$object->{$this->id_name} = $id;
$object->{db_name} = $db_name;
return $id;
}
else
{
return false;
}
}
protected function get_where($_)
{
$args = func_get_args();
if (count($args) == 1)
{
$arg = reset($args);
if (is_numeric($arg))
{
$id = (int) $arg;
if (empty($id))
{
return '';
}
$args = array($this->pk_name, $arg);
}
else if (is_string($arg))
{
return $arg;
}
else if (is_array($arg))
{
$args = $arg;
}
else
{
return $arg;
}
}
$items = array();
foreach ($args as $key => $val)
{
$items[] = $key . ' = ' . $this->format_value($val);
}
return implode(' AND ', $items);
}
protected function format_value($value)
{
if (is_null($value))
{
return 'NULL';
}
if (is_bool($var))
{
return $value ? '1' : '0';
}
else if (is_numeric($value))
{
return empty($value) ? '0' : $value;
}
else if (is_string($value))
{
$value = mysql_escape_string($value);
return "'$value'";
}
else
{
return $value;
}
}
/**
*
* @param string $sql
* @return array
*/
protected function query($sql)
{
$resource = Database::query($sql, null, __FILE__);
if ($resource == false)
{
return array();
}
$result = array();
while ($data = mysql_fetch_assoc($resource))
{
$result[] = $this->create_object($data);
}
return $result;
}
/**
* @param string $sql
*/
protected function execute($sql)
{
return Database::query($sql, null, __FILE__);
}
}
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