Initial

system/Database/Config.php

@@ -0,0 +1,145 @@
+<?php
+
+/**
+ * This file is part of CodeIgniter 4 framework.
+ *
+ * (c) CodeIgniter Foundation <admin@codeigniter.com>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace CodeIgniter\Database;
+
+use CodeIgniter\Config\BaseConfig;
+use InvalidArgumentException;
+
+/**
+ * Class Config
+ */
+class Config extends BaseConfig
+{
+    /**
+     * Cache for instance of any connections that
+     * have been requested as a "shared" instance.
+     *
+     * @var array
+     */
+    protected static $instances = [];
+
+    /**
+     * The main instance used to manage all of
+     * our open database connections.
+     *
+     * @var Database|null
+     */
+    protected static $factory;
+
+    /**
+     * Creates the default
+     *
+     * @param array|string $group     The name of the connection group to use, or an array of configuration settings.
+     * @param bool         $getShared Whether to return a shared instance of the connection.
+     *
+     * @return BaseConnection
+     */
+    public static function connect($group = null, bool $getShared = true)
+    {
+        // If a DB connection is passed in, just pass it back
+        if ($group instanceof BaseConnection) {
+            return $group;
+        }
+
+        if (is_array($group)) {
+            $config = $group;
+            $group  = 'custom-' . md5(json_encode($config));
+        }
+
+        $config = $config ?? config('Database');
+
+        if (empty($group)) {
+            $group = ENVIRONMENT === 'testing' ? 'tests' : $config->defaultGroup;
+        }
+
+        if (is_string($group) && ! isset($config->{$group}) && strpos($group, 'custom-') !== 0) {
+            throw new InvalidArgumentException($group . ' is not a valid database connection group.');
+        }
+
+        if ($getShared && isset(static::$instances[$group])) {
+            return static::$instances[$group];
+        }
+
+        static::ensureFactory();
+
+        if (isset($config->{$group})) {
+            $config = $config->{$group};
+        }
+
+        $connection = static::$factory->load($config, $group);
+
+        static::$instances[$group] = &$connection;
+
+        return $connection;
+    }
+
+    /**
+     * Returns an array of all db connections currently made.
+     */
+    public static function getConnections(): array
+    {
+        return static::$instances;
+    }
+
+    /**
+     * Loads and returns an instance of the Forge for the specified
+     * database group, and loads the group if it hasn't been loaded yet.
+     *
+     * @param array|ConnectionInterface|string|null $group
+     *
+     * @return Forge
+     */
+    public static function forge($group = null)
+    {
+        $db = static::connect($group);
+
+        return static::$factory->loadForge($db);
+    }
+
+    /**
+     * Returns a new instance of the Database Utilities class.
+     *
+     * @param array|string|null $group
+     *
+     * @return BaseUtils
+     */
+    public static function utils($group = null)
+    {
+        $db = static::connect($group);
+
+        return static::$factory->loadUtils($db);
+    }
+
+    /**
+     * Returns a new instance of the Database Seeder.
+     *
+     * @return Seeder
+     */
+    public static function seeder(?string $group = null)
+    {
+        $config = config('Database');
+
+        return new Seeder($config, static::connect($group));
+    }
+
+    /**
+     * Ensures the database Connection Manager/Factory is loaded and ready to use.
+     */
+    protected static function ensureFactory()
+    {
+        if (static::$factory instanceof Database) {
+            return;
+        }
+
+        static::$factory = new Database();
+    }
+}