😘 重构完成！！！！！！

src/cqbot/utils/ConnectionManager.php

@@ -0,0 +1,45 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: jerry
+ * Date: 2018/11/26
+ * Time: 10:20 AM
+ */
+
+class ConnectionManager
+{
+    static function getAll($type = null){
+        if ($type === null) return Cache::$connect;
+        $ls = [];
+        foreach (Cache::$connect as $k => $v) {
+            switch ($type) {
+                case "robot":
+                    /** @var RobotWSConnection[] $ls */
+                    if ($v instanceof RobotWSConnection) $ls[] = $v;
+                    break;
+                default:
+                    break;
+            }
+        }
+        return $ls;
+    }
+
+    public static function get($fd) { return Cache::$connect[$fd] ?? null; }
+
+    public static function set($fd, WSConnection $connection) { Cache::$connect[$fd] = $connection; }
+
+    public static function remove($fd) { unset(Cache::$connect[$fd]); }
+
+    public static function isConnectExists($fd) { return array_key_exists($fd, Cache::$connect); }
+
+    /**
+     * @param $qq
+     * @return null|RobotWSConnection|NullConnection
+     */
+    public static function getRobotConnection($qq) {
+        foreach (Cache::$connect as $v) {
+            if ($v instanceof RobotWSConnection && $v->getQQ() == $qq && $v->getSubType() != "event") return $v;
+        }
+        return new NullConnection(Cache::$server, -1, "0.0.0.0", $qq);
+    }
+}