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// +---------------------------------------------------------------------- |
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// | ThinkPHP [ WE CAN DO IT JUST THINK ] |
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// +---------------------------------------------------------------------- |
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// | Copyright (c) 2006~2019 http://thinkphp.cn All rights reserved. |
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// +---------------------------------------------------------------------- |
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 ) |
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// +---------------------------------------------------------------------- |
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// | Author: liu21st <[email protected]> |
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// +---------------------------------------------------------------------- |
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declare (strict_types = 1); |
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namespace think; |
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use InvalidArgumentException; |
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use think\db\Connection; |
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use think\db\Query; |
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use think\db\Raw; |
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class Db |
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{ |
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/** |
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* 当前数据库连接对象 |
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* @var Connection |
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*/ |
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protected $connection; |
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/** |
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* 数据库连接实例 |
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* @var array |
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*/ |
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protected $instance = []; |
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/** |
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* 配置对象 |
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* @var Config |
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*/ |
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protected $config; |
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/** |
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* Event对象 |
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* @var Event |
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*/ |
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protected $event; |
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/** |
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* 数据库配置 |
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* @var array |
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*/ |
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protected $option = []; |
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/** |
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* 查询次数 |
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* @var int |
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*/ |
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protected $queryTimes = 0; |
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/** |
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* 架构函数 |
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* @param array $config 连接配置 |
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* @access public |
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*/ |
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public function __construct(array $config = []) |
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{ |
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$this->option = $config; |
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$this->connect($config); |
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} |
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public static function __make(Event $event, Config $config) |
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{ |
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$db = new static($config->get('database')); |
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$db->event = $event; |
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$db->config = $config; |
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return $db; |
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} |
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/** |
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* 切换数据库连接 |
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* @access public |
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* @param mixed $config 连接配置 |
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* @param bool|string $name 连接标识 true 强制重新连接 |
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* @return $this |
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*/ |
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public function connect($config = [], $name = false) |
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{ |
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$this->connection = $this->instance($this->parseConfig($config), $name); |
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return $this; |
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} |
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/** |
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* 取得数据库连接类实例 |
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* @access public |
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* @param array $config 连接配置 |
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* @param bool|string $name 连接标识 true 强制重新连接 |
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* @return Connection |
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*/ |
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public function instance(array $config = [], $name = false) |
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{ |
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if (false === $name) { |
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$name = md5(serialize($config)); |
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} |
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if (true === $name || !isset($this->instance[$name])) { |
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if (empty($config['type'])) { |
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throw new InvalidArgumentException('Undefined db type'); |
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} |
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if (true === $name) { |
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$name = md5(serialize($config)); |
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} |
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$this->instance[$name] = App::factory($config['type'], '\\think\\db\\connector\\', $config); |
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} |
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return $this->instance[$name]; |
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} |
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/** |
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* 使用表达式设置数据 |
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* @access public |
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* @param string $value 表达式 |
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* @return Raw |
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*/ |
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public function raw(string $value): Raw |
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{ |
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return new Raw($value); |
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} |
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/** |
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* 更新查询次数 |
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* @access public |
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* @return void |
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*/ |
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public function updateQueryTimes(): void |
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{ |
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$this->queryTimes++; |
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} |
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/** |
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* 获得查询次数 |
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* @access public |
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* @return integer |
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*/ |
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public function getQueryTimes(): int |
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{ |
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return $this->queryTimes; |
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} |
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/** |
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* 数据库连接参数解析 |
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* @access private |
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* @param mixed $config |
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* @return array |
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*/ |
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private function parseConfig($config): array |
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{ |
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if (empty($config)) { |
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$config = $this->option; |
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} elseif (is_string($config)) { |
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// 支持读取配置参数 |
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$config = $this->option[$config] ?? null; |
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} |
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return $config; |
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} |
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/** |
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* 获取数据库的配置参数 |
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* @access public |
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* @param string $name 参数名称 |
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* @return mixed |
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*/ |
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public function getConfig(string $name = '') |
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{ |
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return $name ? ($this->option[$name] ?? null) : $this->option; |
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} |
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/** |
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* 创建一个新的查询对象 |
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* @access public |
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* @param string|array $connection 连接配置信息 |
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* @return mixed |
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*/ |
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public function buildQuery($connection = []) |
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{ |
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return $this->connect($connection)->newQuery(); |
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} |
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/** |
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* 注册回调方法 |
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* @access public |
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* @param string $event 事件名 |
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* @param callable $callback 回调方法 |
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* @return void |
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*/ |
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public function event(string $event, callable $callback): void |
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{ |
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$this->event->listen('db.' . $event, $callback); |
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} |
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/** |
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* 触发事件 |
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* @access public |
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* @param string $event 事件名 |
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* @param mixed $params 传入参数 |
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* @param bool $once |
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* @return mixed |
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*/ |
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public function trigger(string $event, $params = null, bool $once = false) |
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{ |
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return $this->event->trigger('db.' . $event, $params, $once); |
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} |
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/** |
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* 创建一个新的查询对象 |
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* @access protected |
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* @param Connection $connection 连接对象 |
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* @return mixed |
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*/ |
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protected function newQuery($connection = null) |
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{ |
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/** @var Query $query */ |
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$connection = $connection ?: $this->connection; |
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$class = $connection->getQueryClass(); |
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$query = new $class($connection); |
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$query->setDb($this); |
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return $query; |
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} |
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public function __call($method, $args) |
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{ |
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$query = $this->newQuery($this->connection); |
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return call_user_func_array([$query, $method], $args); |
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} |
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} |
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