chore: add acl config (#2128)

api/v2/acl_config.go

@@ -0,0 +1,26 @@
+package v2
+
+import "strings"
+
+var authenticationAllowlistMethods = map[string]bool{
+	"/memos.api.v2.SystemService/GetSystemInfo": true,
+	"/memos.api.v2.UserService/GetUser":         true,
+	"/memos.api.v2.MemoService/ListMemos":       true,
+}
+
+// isUnauthorizeAllowedMethod returns whether the method is exempted from authentication.
+func isUnauthorizeAllowedMethod(fullMethodName string) bool {
+	if strings.HasPrefix(fullMethodName, "/grpc.reflection") {
+		return true
+	}
+	return authenticationAllowlistMethods[fullMethodName]
+}
+
+var allowedMethodsOnlyForAdmin = map[string]bool{
+	"/memos.api.v2.UserService/CreateUser": true,
+}
+
+// isOnlyForAdminAllowedMethod returns true if the method is allowed to be called only by admin.
+func isOnlyForAdminAllowedMethod(methodName string) bool {
+	return allowedMethodsOnlyForAdmin[methodName]
+}