503 lines
11 KiB
PHP
503 lines
11 KiB
PHP
<?php
|
||
|
||
namespace top\library;
|
||
|
||
use top\library\database\Base;
|
||
use top\library\exception\DatabaseException;
|
||
|
||
/**
|
||
* 数据库操作类
|
||
* @author topnuomi 2018年11月21日
|
||
*/
|
||
class Database
|
||
{
|
||
|
||
/**
|
||
* 数据库连接
|
||
* @var Base
|
||
*/
|
||
private static $connection = null;
|
||
|
||
/**
|
||
* 当前类实例
|
||
* @var array
|
||
*/
|
||
private static $instance = [];
|
||
|
||
/**
|
||
* 数据库配置
|
||
* @var array
|
||
*/
|
||
private $config = [];
|
||
|
||
/**
|
||
* 当前操作的表
|
||
* @var string
|
||
*/
|
||
private $table = '';
|
||
|
||
/**
|
||
* 当前表的主键
|
||
* @var string
|
||
*/
|
||
private $pk = '';
|
||
|
||
/**
|
||
* 别名
|
||
* @var null
|
||
*/
|
||
private $alias = null;
|
||
|
||
/**
|
||
* 数据去重
|
||
* @var null
|
||
*/
|
||
private $distinct = false;
|
||
|
||
/**
|
||
* 操作的字段
|
||
* @var null
|
||
*/
|
||
private $field = null;
|
||
|
||
/**
|
||
* 条件
|
||
* @var array
|
||
*/
|
||
private $where = [];
|
||
|
||
/**
|
||
* 排序
|
||
* @var null
|
||
*/
|
||
private $order = null;
|
||
|
||
/**
|
||
* 范围
|
||
* @var null
|
||
*/
|
||
private $limit = null;
|
||
|
||
/**
|
||
* 多表
|
||
* @var array
|
||
*/
|
||
private $join = [];
|
||
|
||
/**
|
||
* Database constructor.
|
||
* @param $table
|
||
* @param $pk
|
||
* @param $prefix
|
||
* @throws DatabaseException
|
||
*/
|
||
private function __construct($table, $pk, $prefix)
|
||
{
|
||
// 获取配置
|
||
$this->config = config('db');
|
||
// 当前操作表名
|
||
$this->table = $this->getTableName($prefix, $table);
|
||
// 当前操作表主键
|
||
$this->pk = $pk;
|
||
if (!self::$connection) { // 保证只有一个数据库连接
|
||
// 设置数据库驱动
|
||
$driver = $this->config['driver'] ? $this->config['driver'] : 'MySQLi';
|
||
$class = '\\top\\library\\database\\driver\\' . $driver;
|
||
if (class_exists($class)) {
|
||
// 获取数据库驱动实例
|
||
self::$connection = $class::instance()->connect($this->config);
|
||
} else throw new DatabaseException('不存在的数据库驱动：' . $driver);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 获取表名
|
||
* @param $prefix
|
||
* @param $table
|
||
* @return string
|
||
*/
|
||
private function getTableName($prefix, $table)
|
||
{
|
||
// 无前缀
|
||
if ($prefix === false) {
|
||
$tableName = $table;
|
||
} elseif (!$prefix) {
|
||
$tableName = $this->config['prefix'] . $table;
|
||
} else {
|
||
$tableName = $prefix . $table;
|
||
}
|
||
return $tableName;
|
||
}
|
||
|
||
/**
|
||
* 指定表
|
||
* @param $table
|
||
* @param string $pk
|
||
* @param string $prefix
|
||
* @return $this
|
||
*/
|
||
public static function table($table = '', $pk = '', $prefix = '')
|
||
{
|
||
$ident = $prefix . $table;
|
||
if (!isset(self::$instance[$ident])) {
|
||
self::$instance[$ident] = new self($table, $pk, $prefix);
|
||
}
|
||
return self::$instance[$ident];
|
||
}
|
||
|
||
/**
|
||
* 设置表别名
|
||
* @param $name
|
||
* @return \top\library\Database
|
||
*/
|
||
public function alias($name)
|
||
{
|
||
$this->alias = $name;
|
||
return $this;
|
||
}
|
||
|
||
/**
|
||
* @param $flag
|
||
* @return \top\library\Database
|
||
*/
|
||
public function distinct($flag = true)
|
||
{
|
||
$this->distinct = $flag ? true : false;
|
||
return $this;
|
||
}
|
||
|
||
/**
|
||
* 设置操作字段
|
||
* @param $field
|
||
* @return \top\library\Database
|
||
*/
|
||
public function field($field)
|
||
{
|
||
$this->field = $field;
|
||
return $this;
|
||
}
|
||
|
||
/**
|
||
* 设置条件
|
||
* @return \top\library\Database
|
||
*/
|
||
public function where()
|
||
{
|
||
$where = func_get_args();
|
||
if (!empty($where)) {
|
||
switch (count($where)) {
|
||
case 3:
|
||
$this->where[] = [
|
||
$where[0] => [
|
||
$where[1],
|
||
$where[2]
|
||
]
|
||
];
|
||
break;
|
||
case 2:
|
||
$this->where[] = [
|
||
$where[0] => $where[1]
|
||
];
|
||
break;
|
||
default:
|
||
$this->where[] = $where[0];
|
||
break;
|
||
}
|
||
}
|
||
return $this;
|
||
}
|
||
|
||
/**
|
||
* 设置排序
|
||
* @return \top\library\Database
|
||
*/
|
||
public function order()
|
||
{
|
||
$order = func_get_args();
|
||
if (!empty($order)) {
|
||
if (count($order) > 1) {
|
||
$this->order = $order[0] . ' ' . $order[1];
|
||
} else {
|
||
$this->order = $order[0];
|
||
}
|
||
}
|
||
return $this;
|
||
}
|
||
|
||
/**
|
||
* 设置记录范围
|
||
* @return \top\library\Database
|
||
*/
|
||
public function limit()
|
||
{
|
||
$limit = func_get_args();
|
||
if (!empty($limit)) {
|
||
if (count($limit) > 1) {
|
||
$this->limit = $limit[0] . ', ' . $limit[1];
|
||
} else {
|
||
$this->limit = $limit[0];
|
||
}
|
||
}
|
||
return $this;
|
||
}
|
||
|
||
/**
|
||
* 多表
|
||
*
|
||
* @param $table
|
||
* @param $on
|
||
* @param string $type
|
||
* @return \top\library\Database
|
||
*/
|
||
public function join($table, $on, $type = 'INNER')
|
||
{
|
||
$tableName = null;
|
||
if (is_array($table) && isset($table[0]) && isset($table[1])) {
|
||
$tableName = $table[0] . $table[1];
|
||
} else {
|
||
$tableName = $this->config['prefix'] . $table;
|
||
}
|
||
$this->join[] = [
|
||
$tableName,
|
||
$on,
|
||
$type
|
||
];
|
||
return $this;
|
||
}
|
||
|
||
/**
|
||
* 插入记录
|
||
*
|
||
* @param array $data
|
||
* @return int|boolean
|
||
*/
|
||
public function insert($data)
|
||
{
|
||
$result = self::$connection->insert($this->table, $data);
|
||
return $result;
|
||
}
|
||
|
||
/**
|
||
* 查询一条记录
|
||
* @param bool $param
|
||
* @return mixed
|
||
*/
|
||
public function find($param = false)
|
||
{
|
||
(is_callable($param)) && $param($this);
|
||
if (!is_bool($param) && !is_callable($param)) {
|
||
$this->where = array_merge($this->where, [
|
||
[($this->alias ? $this->alias . '.' : '') . $this->getPk() => $param],
|
||
]);
|
||
}
|
||
$result = self::$connection->find(
|
||
$this->table,
|
||
$this->alias,
|
||
$this->distinct,
|
||
$this->field,
|
||
$this->join,
|
||
$this->where,
|
||
$this->order
|
||
);
|
||
$this->_reset();
|
||
return $result;
|
||
}
|
||
|
||
/**
|
||
* 查询所有记录
|
||
*
|
||
* @param callable|string|bool $param
|
||
* @return array|boolean
|
||
*/
|
||
public function select($param = false)
|
||
{
|
||
(is_callable($param)) && $param($this);
|
||
if (!is_bool($param) && !is_callable($param)) {
|
||
$this->where = array_merge($this->where, [
|
||
[($this->alias ? $this->alias . '.' : '') . $this->getPk() => $param],
|
||
]);
|
||
}
|
||
$result = self::$connection->select(
|
||
$this->table,
|
||
$this->alias,
|
||
$this->distinct,
|
||
$this->field,
|
||
$this->join,
|
||
$this->where,
|
||
$this->order,
|
||
$this->limit
|
||
);
|
||
$this->_reset();
|
||
foreach ($result as $k => $v)
|
||
$result[$k] = $v;
|
||
return $result;
|
||
}
|
||
|
||
/**
|
||
* 更新记录
|
||
*
|
||
* @param array $data
|
||
* @param callable|string|bool $param
|
||
* @return int|boolean
|
||
*/
|
||
public function update($data, $param = false)
|
||
{
|
||
(is_callable($param)) && $param($this);
|
||
if (!is_bool($param) && !is_callable($param)) {
|
||
$this->where = array_merge($this->where, [
|
||
[($this->alias ? $this->alias . '.' : '') . $this->getPk() => $param],
|
||
]);
|
||
}
|
||
$result = self::$connection->update(
|
||
$this->table,
|
||
$this->alias,
|
||
$this->join,
|
||
$this->where,
|
||
$this->order,
|
||
$this->limit,
|
||
$data
|
||
);
|
||
$this->_reset();
|
||
return $result;
|
||
}
|
||
|
||
/**
|
||
* 删除记录
|
||
*
|
||
* @param callable|string|bool $param
|
||
* @return int|boolean
|
||
*/
|
||
public function delete($param = false)
|
||
{
|
||
(is_callable($param)) && $param($this);
|
||
if (!is_bool($param) && !is_callable($param)) {
|
||
$this->where = array_merge($this->where, [
|
||
[($this->alias ? $this->alias . '.' : '') . $this->getPk() => $param],
|
||
]);
|
||
}
|
||
$result = self::$connection->delete(
|
||
$this->table,
|
||
$this->alias,
|
||
$this->join,
|
||
$this->where,
|
||
$this->order,
|
||
$this->limit
|
||
);
|
||
$this->_reset();
|
||
|
||
return $result;
|
||
}
|
||
|
||
/**
|
||
* 公共方法 （sum、avg等等使用函数包裹字段的方法）
|
||
*
|
||
* @param $param
|
||
* @param $type
|
||
* @return mixed
|
||
*/
|
||
public function common($param, $type)
|
||
{
|
||
(is_callable($param)) && $param($this);
|
||
if (empty($this->field) && $param && !is_callable($param)) {
|
||
$this->field = $param;
|
||
}
|
||
$result = self::$connection->common(
|
||
$this->table,
|
||
$this->alias,
|
||
$this->field,
|
||
$this->join,
|
||
$this->where,
|
||
$type
|
||
);
|
||
$this->_reset();
|
||
|
||
return $result;
|
||
}
|
||
|
||
/**
|
||
* 执行一条SQL
|
||
* @param $query
|
||
* @param array $params
|
||
* @return bool|\PDOStatement
|
||
*/
|
||
public function query($query, $params = [])
|
||
{
|
||
return self::$connection->query($query, $params);
|
||
}
|
||
|
||
/**
|
||
* 开启事务
|
||
*/
|
||
public function begin()
|
||
{
|
||
self::$connection->begin();
|
||
}
|
||
|
||
/**
|
||
* 提交
|
||
*/
|
||
public function commit()
|
||
{
|
||
self::$connection->commit();
|
||
}
|
||
|
||
/**
|
||
* 回滚
|
||
*/
|
||
public function rollback()
|
||
{
|
||
self::$connection->rollback();
|
||
}
|
||
|
||
/**
|
||
* 返回PDO
|
||
* @return \PDO
|
||
*/
|
||
public function getPDO()
|
||
{
|
||
return self::$connection->getPDO();
|
||
}
|
||
|
||
/**
|
||
* 获取最后执行的SQL语句
|
||
*
|
||
* @return string
|
||
*/
|
||
public function sql()
|
||
{
|
||
return self::$connection->sql();
|
||
}
|
||
|
||
/**
|
||
* 重置查询条件
|
||
*/
|
||
private function _reset()
|
||
{
|
||
$this->distinct = false;
|
||
$this->field = null;
|
||
$this->join = [];
|
||
$this->where = [];
|
||
$this->order = null;
|
||
$this->limit = null;
|
||
}
|
||
|
||
/**
|
||
* 获取主键
|
||
*
|
||
* @return string
|
||
*/
|
||
private function getPk()
|
||
{
|
||
if (!$this->pk) {
|
||
$pk = self::$connection->getPk($this->table, $this->config['dbname']);
|
||
return ($pk) ? $pk : 'id';
|
||
}
|
||
return $this->pk;
|
||
}
|
||
|
||
private function __clone()
|
||
{
|
||
}
|
||
|
||
}
|