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DB.php
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DB.php
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<?php
/********************************************
* Easy PHP *
* *
* A lightweight PHP framework for studying *
* *
* TIERGB *
* <https://github.com/TIGERB> *
* *
********************************************/
namespace Framework\Orm;
use Framework\App;
use Framework\Exceptions\CoreHttpException;
/**
* db使用决策类
*
* 目前策略只支持mysql
*
* @author TIERGB <https://github.com/TIGERB>
*/
class DB
{
/**
* Sql解释器
*/
use Interpreter;
/**
* 数据库类型
*
* 目前只支持mysql
*
* @var string
*/
protected $dbtype = '';
/**
* 表名称
*
* table name
*
* @var string
*/
protected $tableName = '';
/**
* 数据库策略映射
*
* 目前只支持mysql
*
* @var array
*/
protected $dbStrategyMap = [
'mysqldb' => 'Framework\Orm\Db\Mysql'
];
/**
* db instance
*
* @var object
*/
protected $dbInstance;
/**
* 自增id
*
* 插入数据成功后的自增id, 0为插入失败
*
* @var string
*/
protected $id = '';
/**
* 走主库的查寻语句
*
* @var array
*/
private $master = ['insert', 'update', 'delete'];
/**
* 当前查询主从
*
* @var string
*/
private $masterSlave = '';
/**
* 数据库配置
*
* @var array
*/
private $dbConfig = [
'dbhost' => '',
'dbname' => '',
'username' => '',
'password' => ''
];
/**
* 构造函数
*/
public function __construct()
{
// $this->init();
}
/**
* 设置表名
*
* @param string $tableName 表名称
* @return void
*/
public static function table($tableName = '')
{
$db = new self;
$db->tableName = $tableName;
$prefix = App::$container->getSingle('config')
->config['database']['dbprefix'];
if (! empty($prefix)) {
$db->tableName = $prefix . '_' . $db->tableName;
}
// $db->init();
return $db;
}
/**
* 初始化策略
*
* @param $masterOrSlave 初始化主库还是从库
* @return void
*/
public function init($masterOrSlave = '')
{
$config = APP::$container->getSingle('config');
$this->dbtype = $config->config['database']['dbtype'];
if (! empty($masterOrSlave)) {
$this->masterSlave = $masterOrSlave;
}
$this->isMasterOrSlave();
$this->decide();
}
/**
* 策略决策
*
* @return void
*/
public function decide()
{
$dbStrategyName = $this->dbStrategyMap[$this->dbtype];
$dbConfig = $this->dbConfig;
$this->dbInstance = APP::$container->getSingle(
"{$this->dbtype}-{$this->masterSlave}",
function () use ($dbStrategyName, $dbConfig) {
return new $dbStrategyName(
$dbConfig['dbhost'],
$dbConfig['dbname'],
$dbConfig['username'],
$dbConfig['password']
);
}
);
}
/**
* 判断走主库还是从库
*
* @return void
*/
public function isMasterOrSlave()
{
if (! empty($this->masterSlave)) {
$this->initMaster();
return;
}
foreach ($this->master as $v) {
$res = stripos($this->sql, $v);
if ($res === 0 || $res) {
$this->initMaster();
return;
}
}
$this->initSlave();
}
/**
* 初始化主库
*/
public function initMaster()
{
$config = APP::$container->getSingle('config');
$dbConfig = $config->config['database'];
$this->dbConfig['dbhost'] = $dbConfig['dbhost'];
$this->dbConfig['dbname'] = $dbConfig['dbname'];
$this->dbConfig['username'] = $dbConfig['username'];
$this->dbConfig['password'] = $dbConfig['password'];
$this->masterSlave = 'master';
}
/**
* 初始化从库
*/
public function initSlave()
{
$config = APP::$container->getSingle('config');
if (! isset($config->config['database']['slave'])) {
$this->initMaster();
return;
}
$slave = $config->config['database']['slave'];
$randSlave = $slave[array_rand($slave)];
$dbConfig = $config->config["database-slave-{$randSlave}"];
$this->dbConfig['dbhost'] = $dbConfig['dbhost'];
$this->dbConfig['dbname'] = $dbConfig['dbname'];
$this->dbConfig['username'] = $dbConfig['username'];
$this->dbConfig['password'] = $dbConfig['password'];
$this->masterSlave = "slave-{$randSlave}";
}
/**
* 查找一条数据
*
* @param array $data 查询的字段
* @return void
*/
public function findOne($data = [])
{
$this->select($data);
$this->buildSql();
$functionName = __FUNCTION__;
return $this->dbInstance->$functionName($this);
}
/**
* 查找所有数据
*
* @param array $data 查询的字段
* @return void
*/
public function findAll($data = [])
{
$this->select($data);
$this->buildSql();
$functionName = __FUNCTION__;
return $this->dbInstance->$functionName($this);
}
/**
* 查找所有数据
*
* @return void
*/
public function save($data = [])
{
$this->insert($data);
$this->init();
$functionName = __FUNCTION__;
return $this->dbInstance->$functionName($this);
}
/**
* 查找所有数据
*
* @return void
*/
public function delete()
{
$this->del();
$this->buildSql();
$functionName = __FUNCTION__;
return $this->dbInstance->$functionName($this);
}
/**
* 查找所有数据
*
* @param array $data 数据
* @return void
*/
public function update($data = [])
{
$this->updateData($data);
$this->buildSql();
$functionName = __FUNCTION__;
return $this->dbInstance->$functionName($this);
}
/**
* count数据
*
* @param string $data 数据
* @return void
*/
public function count($data = '')
{
$this->countColumn($data);
$this->buildSql();
return $this->dbInstance->findAll($this);
}
/**
* sum数据
*
* @param string $data 数据
* @return void
*/
public function sum($data = '')
{
$this->sumColumn($data);
$this->buildSql();
return $this->dbInstance->findAll($this);
}
/**
* sum数据
*
* @param string $data 数据
* @return void
*/
public function query($sql = '')
{
$this->querySql($sql);
$this->init();
return $this->dbInstance->query($this);
}
/**
* 构建sql语句
*
* @return void
*/
public function buildSql()
{
if (! empty($this->where)) {
$this->sql .= $this->where;
}
if (! empty($this->orderBy)) {
$this->sql .= $this->orderBy;
}
if (! empty($this->limit)) {
$this->sql .= $this->limit;
}
$this->init();
}
/**
* stop auto commit transaction and start a transaction
*
* @return void
*/
public static function beginTransaction()
{
$instance = APP::$container->getSingle('DB', function () {
return new DB();
}
);
$instance->init('master');
$instance->dbInstance->beginTransaction();
}
/**
* commit a transaction
*
* @return void
*/
public static function commit()
{
$instance = APP::$container->getSingle('DB', function () {
return new DB();
}
);
$instance->init('master');
$instance->dbInstance->commit();
}
/**
* rollback a transaction
*
* @return void
*/
public static function rollBack()
{
$instance = APP::$container->setSingle('DB', function () {
return new DB();
}
);
$instance->init('master');
$instance->dbInstance->rollBack();
}
/**
* 魔法函数__get
*
* @param string $name 属性名称
* @return mixed
*/
public function __get($name = '')
{
return $this->$name;
}
/**
* 魔法函数__set
*
* @param string $name 属性名称
* @param mixed $value 属性值
* @return mixed
*/
public function __set($name = '', $value = '')
{
$this->$name = $value;
}
}