<?php

/**
 * Define SQL for Mysql database system
 * @author valentin carruesco
 * @category Core
 * @license copyright
 */

class Mysql
{
	const label = 'MySQL';
	const connection = 'mysql:host={{host}};dbname={{name}}';
	const description = 'Base robuste authentifiée necessitant un serveur Mysql (Conseillé)';
	const table_escape = '`';
	const column_escape = '`';

	public static function pdo_attributes(){
		return array(
			PDO::ATTR_PERSISTENT => true,
			PDO::ATTR_ERRMODE=> PDO::ERRMODE_EXCEPTION
		);
	}

	public static function fields(){
		return array(
			array('id'=>'host','label'=>'Serveur','default'=>'localhost','comment'=>''),
			array('id'=>'login','label'=>'Identifiant','default'=>'','comment'=>''),
			array('id'=>'password','label'=>'Mot de passe','default'=>'','comment'=>''),
			array('id'=>'name','label'=>'Nom de la base','default'=>'','comment'=>'')
		);
	}

	public static function processField(&$field,&$value,&$values,&$i){
		if($field['operator'] == 'IN'){
            $field['tag'] = array(); 
            foreach (explode(',',$value) as $v2) {
                $tag = ':'.$i;
                $field['tag'][]= $tag;
                $values[$tag] = $v2;
                $i++;
            }
            $field['tag'] = implode(',',$field['tag']);
            $field['operator'] = 'IN(';
            $field['postoperator'] = ')';
        }else{
            $tag = ':'.$i;
            $field['tag'] = $tag;
            $values[$tag] = $value;
            $i++;
        }
	}

	public static function types(){
		$types = array();
		$types['string']  = 'VARCHAR(225) CHARACTER SET utf8 COLLATE utf8_general_ci';
		$types['longstring'] = 'TEXT CHARACTER SET utf8 COLLATE utf8_general_ci';
		$types['key'] = 'int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY';
		$types['object'] = $types['timestamp'] = $types['datetime'] = $types['date'] = $types['int'] = 'INT(11)';
		$types['boolean'] = 'tinyint(1) NOT NULL DEFAULT \'0\'';
		$types['blob'] = ' BLOB';
		$types['float'] = 'FLOAT';
		$types['decimal'] = 'DECIMAL(20,2)';
		$types['default'] = 'TEXT CHARACTER SET utf8 COLLATE utf8_general_ci';
		return $types;
	}

	public static function beforeTransaction($pdo){
		$pdo->exec("set names utf8");
	}
	
	public static function select(){
		$sql = 'SELECT {{:selected}}{{value}}{{;}},{{/;}}{{/:selected}} FROM `{{table}}` {{?joins}}{{:joins}}LEFT JOIN `{{jointable2}}` ON `{{jointable1}}`.{{field1}}= `{{jointable2}}`.{{field2}} {{/:joins}}{{/?joins}} {{?filter}} WHERE {{:filter}} `{{table}}`.`{{key}}` {{operator}} {{value}} {{postoperator}} {{;}} AND {{/;}} {{/:filter}} {{/?filter}} {{?orderby}}ORDER BY {{:orderby}}{{value}}{{;}},{{/;}}{{/:orderby}} {{/?orderby}} {{?limit}}LIMIT {{:limit}}{{value}}{{;}},{{/;}}{{/:limit}}{{/?limit}}';
		return $sql;
	}
	public static function delete(){
		$sql = 'DELETE FROM `{{table}}` {{?filter}}WHERE {{:filter}}`{{key}}`{{operator}}{{value}} {{;}} AND {{/;}} {{/:filter}} {{/?filter}} {{?limit}}LIMIT {{:limit}}{{value}}{{;}},{{/;}}{{/:limit}}{{/?limit}}';
		return $sql;
	}
	public static function count(){
		$sql = 'SELECT COUNT({{selected}}) number FROM `{{table}}` {{?filter}}WHERE {{:filter}}`{{key}}`{{operator}}{{value}}{{postoperator}} {{;}} AND {{/;}} {{/:filter}} {{/?filter}}';
		return $sql;
	}
	public static function update(){
		$sql = 'UPDATE `{{table}}` SET {{?fields}} {{:fields}}`{{key}}`={{value}} {{;}} , {{/;}} {{/:fields}} {{/?fields}} {{?filters}}WHERE {{:filters}}`{{key}}`{{operator}} {{value}} {{postoperator}} {{;}} AND {{/;}} {{/:filters}} {{/?filters}}';
		return $sql;
	}
	public static function insert(){
		$sql = 'INSERT INTO  `{{table}}` ({{?fields}} {{:fields}}`{{key}}` {{;}} , {{/;}} {{/:fields}} {{/?fields}})VALUES({{?fields}} {{:fields}}{{value}} {{;}} , {{/;}} {{/:fields}} {{/?fields}})';
		return $sql;
	}
	public static function create(){
		$sql = 'CREATE TABLE IF NOT EXISTS `{{table}}` ({{?fields}} {{:fields}}`{{key}}` {{value}}{{;}} , {{/;}} {{/:fields}} {{/?fields}}) ENGINE=MyISAM DEFAULT CHARSET=utf8;';
		return $sql;
	}
	public static function drop(){
		$sql = 'DROP TABLE IF EXISTS `{{table}}`;';
		return $sql;
	}

	public static function truncate(){
		$sql = 'TRUNCATE TABLE `{{table}}`;';
		return $sql;
	}

	public static function create_index(){
		$sql = 'CREATE INDEX `{{index_name}}` ON `{{table}}` ({{column}})';
		return $sql;
	}

	public static function drop_index(){
		$sql = 'DROP INDEX `{{index_name}}` ON `{{table}}`';
		return $sql;
	}

	public static function count_index(){
		$sql = "SELECT COUNT(1) `exists` FROM INFORMATION_SCHEMA.STATISTICS
		WHERE table_schema=DATABASE() AND table_name='{{table}}' AND index_name='{{index_name}}'";
		return $sql;
	}

	public static function show_tables(){
		$sql = 'SHOW TABLES';
		return $sql;
	}

	public static function show_columns(){
	  $sql = 'SELECT COLUMN_NAME `column`,DATA_TYPE `type` FROM INFORMATION_SCHEMA.COLUMNS WHERE table_name = "{{table}}"';
	  return $sql;
	}
}

?>