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<?php
/**
* Class for Database Table management
*
* PHP version 5
*
* Copyright © 2010 Remi Collet
*
* This file is part of rpmphp.
*
* rpmphp is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* rpmphp 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with rpmphp. If not, see <http://www.gnu.org/licenses/>.
*
* @category Main
* @package RPMPHP
*
* @author Remi Collet <unknown@unknwown.com>
* @author Johan Cwiklinski <johan@x-tnd.be>
* @copyright 2010 Remi Collet
* @license http://www.gnu.org/licenses/agpl-3.0-standalone.html AGPL License 3.0 or (at your option) any later version
* @link http://github.com/remicollet/rpmphp/
* @since The begining of times.
*/
abstract class CommonTable
{
protected $db;
protected $table;
/**
* Instanciate a CommonTable
*
* @param object $db PDO instance of the DB connection
* @param string $table with table name
*/
function __construct(PDO $db, $table)
{
$this->db = $db;
$this->table = $table;
if (!$this->existsTable($table)) {
$this->createTable($table);
}
}
/**
* Check if the table already exists
*
* @param string $table with table name
*
* @return boolean
*/
public function existsTable($table)
{
$req = new TableIterator($this->db, "SHOW TABLES LIKE '$table'");
foreach ($req as $data) {
return true;
}
return false;
}
/**
* Execute an SQL statement (INSERT, DELETE, ...)
*
* @param string $sql The SQL clause
*
* @return integer number of affected rows
*/
protected function exec($sql)
{
$res = $this->db->exec($sql);
if ($res===false) {
$err = $this->db->errorInfo();
throw new Exception("\nSQL: $sql\nERROR: ".$err[2]."\nCODE:");
}
return $res;
}
/**
* Add a new row in the table
*
* @param hashtable $fields hashtable of fieldname => value
*
* @return integer primary key of inserted row
*/
public function add(array $fields)
{
$col = array();
$val = array();
foreach ($fields as $name => $value) {
$col[] = "`$name`";
if (is_null($value)) {
$val[] = 'NULL';
} else if (is_numeric($value)) {
$val[] = $value;
} else {
$val[] = "'".addslashes($value)."'";
}
}
$sql = "INSERT INTO `".$this->table."` (".implode(',', $col).")
VALUE (".implode(',', $val).")";
$this->exec($sql);
$id = $this->db->lastInsertId();
return $id;
}
/**
* Delete a row in the table
*
* @param hashtable $crit of key => value
*
* @return integer : number of row deleted
*/
public function delete(array $crit)
{
$sql = "DELETE FROM `".$this->table."` ";
$link="WHERE";
foreach ($crit as $key => $value) {
$sql .= " $link `$key`";
if (is_null($value)) {
$sql .= 'IS NULL';
} else if (is_numeric($value)) {
$sql .= '='.$value;
} else {
$sql .= "='".addslashes($value)."'";
}
$link = "AND";
}
$nb = $this->exec($sql);
return $nb;
}
/**
* Create the table
*
* @return void
*/
abstract protected function createTable();
/**
* Instanciate a Simple TableIterator on the current table
*
* Examples =
* foreach ($DB->request() as $ID => $data) { ... }
* foreach ($DB->request("ID=1") as $ID => $data) { ... }
* foreach ($DB->request("", "name") as $ID => $data) { ... }
* foreach ($DB->request(array(
* "name"=>"SBEI003W",
* "entities_id"=>1),
* array("serial","otherserial")) { ... }
*
* @param string|array $crit string or array of field/values,
* ex array("id"=>1), if empty => all rows
*
* Examples =
* array("id"=>NULL)
* array("OR"=>array("id"=>1, "NOT"=>array("state"=>3)));
* array(
* "AND"=>array(
* "id"=>1,array(
* "NOT"=>array(
* "state"=>array(3,4,5),
* "toto"=>2
* )
* )
* )
* )
*
* param 'FIELDS' name or array of field names
* param 'ORDER' filed name or array of field names
* param 'LIMIT' max of row to retrieve
* param 'START' first row to retrieve
*
* @return DBIterator
**/
public function request ($crit='')
{
return new TableIterator ($this->db, $this->table, $crit);
}
/**
* Retrieve 2 columns of all the table's row in a hashtable
*
* @param string $fieldkey name of the field to use as index
* @param string $fieldvalue name of the field to use as value
* @param array $crit for request
*
* @return hashtable
*/
public function getHashtable($fieldkey, $fieldvalue, array $crit=array())
{
$crit['FIELDS'] = array($fieldkey, $fieldvalue);
$crit['ORDER'] = $fieldkey;
$tab = array();
foreach ($this->request($crit) as $data) {
$tab[$data[$fieldkey]] = $data[$fieldvalue];
}
return $tab;
}
/**
* Retrieve a big array with all date from the table
*
* @param array|string $crit for the request
*
* @return array, index is rowid, value is a hastable
*/
public function getArray($crit='')
{
$tab = array();
foreach ($this->request($crit) as $id => $data) {
$tab[$id] = $data;
}
return $tab;
}
}
?>
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