改名

Database/Db.php

@@ -0,0 +1,328 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: whwyy
+ * Date: 2018/4/4 0004
+ * Time: 15:40
+ */
+
+namespace Database;
+
+use Database\Traits\QueryTrait;
+use Exception;
+use Snowflake\Exception\ComponentException;
+use Snowflake\Snowflake;
+
+/**
+ * Class Db
+ * @package Database
+ */
+class Db
+{
+	use QueryTrait;
+
+	private static $db;
+
+	private static $isActive = false;
+
+	/**
+	 * @return bool
+	 */
+	public static function transactionsActive()
+	{
+		return static::$isActive;
+	}
+
+	/**
+	 * @throws Exception
+	 */
+	public static function beginTransaction()
+	{
+		static::$isActive = true;
+	}
+
+	/**
+	 * @throws Exception
+	 */
+	public static function commit()
+	{
+		$event = Snowflake::get()->event;
+		$event->trigger(Connection::TRANSACTION_COMMIT);
+		$event->offName(Connection::TRANSACTION_COMMIT);
+		static::$isActive = false;
+	}
+
+	/**
+	 * @throws Exception
+	 */
+	public static function rollback()
+	{
+		$event = Snowflake::get()->event;
+		$event->trigger(Connection::TRANSACTION_ROLLBACK);
+		$event->offName(Connection::TRANSACTION_ROLLBACK);
+		static::$isActive = false;
+	}
+
+	/**
+	 * @param $table
+	 *
+	 * @return static
+	 */
+	public static function table($table)
+	{
+		$db = new Db();
+		$db->from($table);
+		return $db;
+	}
+
+	/**
+	 * @param string $column
+	 * @param string $alias
+	 * @return string
+	 */
+	public static function any_value(string $column, string $alias = '')
+	{
+		if (empty($alias)) {
+			$alias = $column . '_any_value';
+		}
+		return 'ANY_VALUE(' . $column . ') as ' . $alias;
+	}
+
+	/**
+	 * @param Connection|null $db
+	 * @return mixed
+	 * @throws Exception
+	 */
+	public function get(Connection $db = NULL)
+	{
+		if (empty($db)) {
+			$db = Snowflake::get()->database;
+		}
+		$query = $db->getSchema()->getQueryBuilder();
+		return $db->createCommand($query->getQuery($this))
+			->all();
+	}
+
+	/**
+	 * @param $column
+	 * @return string
+	 */
+	public static function raw($column)
+	{
+		return '`' . $column . '`';
+	}
+
+	/**
+	 * @param Connection $db
+	 * @return array|mixed
+	 * @throws Exception
+	 */
+	public function find(Connection $db = NULL)
+	{
+		if (empty($db)) {
+			$db = Snowflake::get()->database;
+		}
+		$query = $db->getSchema()->getQueryBuilder();
+		return $db->createCommand($query->getQuery($this))
+			->one();
+	}
+
+	/**
+	 * @param Connection|NULL $db
+	 * @return bool|int
+	 * @throws Exception
+	 */
+	public function count(Connection $db = NULL)
+	{
+		if (empty($db)) {
+			$db = Snowflake::get()->database;
+		}
+		$query = $db->getSchema()->getQueryBuilder();
+		return $db->createCommand($query->count($this))
+			->rowCount();
+	}
+
+	/**
+	 * @param Connection|NULL $db
+	 * @return bool|int
+	 * @throws Exception
+	 */
+	public function exists(Connection $db = NULL)
+	{
+		if (empty($db)) {
+			$db = Snowflake::get()->database;
+		}
+		$query = $db->getSchema()->getQueryBuilder();
+		return $db->createCommand($query->getQuery($this))
+			->fetchColumn();
+	}
+
+	/**
+	 * @param string $sql
+	 * @param array $attributes
+	 * @param Connection|null $db
+	 * @return array|bool|int|string|null
+	 * @throws Exception
+	 */
+	public static function findAllBySql(string $sql, array $attributes = [], Connection $db = NULL)
+	{
+		return $db->createCommand($sql, $attributes)->all();
+	}
+
+	/**
+	 * @param string $sql
+	 * @param array $attributes
+	 * @param Connection|NULL $db
+	 * @return array|mixed
+	 * @throws Exception
+	 */
+	public static function findBySql(string $sql, array $attributes = [], Connection $db = NULL)
+	{
+		return $db->createCommand($sql, $attributes)->one();
+	}
+
+	/**
+	 * @param string $field
+	 * @return array|null
+	 * @throws Exception
+	 */
+	public function values(string $field)
+	{
+		$data = $this->get();
+		if (empty($data) || empty($field)) {
+			return NULL;
+		}
+		$first = current($data);
+		if (!isset($first[$field])) {
+			return NULL;
+		}
+		return array_column($data, $field);
+	}
+
+	/**
+	 * @param $field
+	 * @return array|mixed|null
+	 * @throws Exception
+	 */
+	public function value($field)
+	{
+		$data = $this->find();
+		if (!empty($field) && isset($data[$field])) {
+			return $data[$field];
+		}
+		return $data;
+	}
+
+	/**
+	 * @param null $db
+	 * @return bool|int
+	 * @throws Exception
+	 */
+	public function delete($db = null)
+	{
+		if (empty($db)) {
+			$db = Snowflake::get()->database;
+		}
+
+		$query = $db->getBuild()->builder($this);
+
+		return $db->createCommand($query)->delete();
+	}
+
+	/**
+	 * @param $table
+	 * @param null $db
+	 * @return bool|int
+	 * @throws Exception
+	 */
+	public static function drop($table, $db = null)
+	{
+		if (empty($db)) {
+			$db = Snowflake::get()->database;
+		}
+		return $db->createCommand('DROP TABLE ' . $table)->delete();
+	}
+
+	/**
+	 * @param $table
+	 * @param null $db
+	 * @return bool|int
+	 * @throws Exception
+	 */
+	public static function truncate($table, $db = null)
+	{
+
+		if (empty($db)) {
+			$db = Snowflake::get()->database;
+		}
+
+		return $db->createCommand('TRUNCATE ' . $table)->exec();
+	}
+
+	/**
+	 * @param $table
+	 * @param Connection|NULL $db
+	 * @return array|mixed|null
+	 * @throws Exception
+	 */
+	public static function showCreateSql($table, Connection $db = NULL)
+	{
+
+		if (empty($db)) {
+			$db = Snowflake::get()->database;
+		}
+
+
+		if (empty($table)) {
+			return null;
+		}
+
+		return $db->createCommand('SHOW CREATE TABLE ' . $table)->one();
+	}
+
+	/**
+	 * @param $table
+	 * @param Connection|NULL $db
+	 * @return bool|int|null
+	 * @throws Exception
+	 */
+	public static function desc($table, Connection $db = NULL)
+	{
+		if (empty($db)) {
+			$db = Snowflake::get()->database;
+		}
+
+		if (empty($table)) {
+			return null;
+		}
+
+		return $db->createCommand('SHOW FULL FIELDS FROM ' . $table)->all();
+	}
+
+
+	/**
+	 * @param string $table
+	 * @param Connection|NULL $db
+	 * @return array|mixed|null
+	 * @throws Exception
+	 */
+	public static function show(string $table, Connection $db = NULL)
+	{
+		if (empty($table)) {
+			return null;
+		}
+
+		if (empty($db)) {
+			$db = Snowflake::get()->database;
+		}
+
+		$table = ['	const TABLE = \'select * from %s  where REFERENCED_TABLE_NAME=%s\';'];
+
+		return $db->createCommand((new Sql())
+			->select('*')
+			->from('INFORMATION_SCHEMA.KEY_COLUMN_USAGE')
+			->where(['REFERENCED_TABLE_NAME' => $table])
+			->getSql())->one();
+	}
+
+}