perf: 自定义语言检测中间件

app/index/middleware/LoadLangPack.php

@@ -0,0 +1,39 @@
+<?php
+declare (strict_types = 1);
+
+namespace app\index\middleware;
+
+use think\Request;
+
+class LoadLangPack extends \think\middleware\LoadLangPack
+{
+    // 重写检测语言方法
+    protected function detect(Request $request): string
+    {
+        $domain_detect = env('INDEX_LANG_DETECT.DOMAIN_DETECT', false);
+        if ($domain_detect) {
+            $lang = $this->getLangSet($request, env('INDEX_LANG_DETECT.DOMAIN_RULE', []));
+            if ($lang != '') {
+                return $lang;
+            }
+        }
+
+        return parent::detect($request);
+    }
+
+    // 根据请求及规则获取语言
+    private function getLangSet(Request $request, array $rules): string
+    {
+        $map = [];
+        foreach ($rules as $v) {
+            $val  = str_replace('，', ',', $v);
+            $item = explode(',', $v);
+            foreach ($item as $val) {
+                $it          = explode('=', $val);
+                $map[$it[0]] = $it[1];
+            }
+        }
+        
+        return $map[$request->host()] ?? '';
+    }
+}