From e3668886087334853cef866d686c231f54153c08 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=BE=90=E6=B6=9B?= <midnite@outlook.com>
Date: Sun, 11 Jun 2023 18:48:48 +0800
Subject: [PATCH] =?UTF-8?q?enhance(cache):=E5=A2=9E=E5=8A=A0=E5=BF=AB?=
 =?UTF-8?q?=E9=80=9F=E5=A4=84=E7=90=86=E5=8F=AF=E7=A9=BA=E5=80=BC=E4=BD=9C?=
 =?UTF-8?q?=E4=B8=BARedis=E7=BC=93=E5=AD=98=E9=94=AE=E7=9A=84=E5=A4=84?=
 =?UTF-8?q?=E7=90=86=E3=80=82?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 cache/abstract.go | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/cache/abstract.go b/cache/abstract.go
index 8d24c69..02c13d6 100644
--- a/cache/abstract.go
+++ b/cache/abstract.go
@@ -137,3 +137,27 @@ func CacheKey(category string, ids ...string) string {
 	}
 	return b.String()
 }
+
+type ToString[T any] interface {
+	ToString() string
+	*T
+}
+
+// 用于生成一个内容可以为空的Redis缓存键，这个键的类型必须实现了`ToString`接口。
+func NullableConditionKey[P any, T ToString[P]](value T, defaultStr ...string) string {
+	defaultStr = append(defaultStr, "UNDEF")
+	if value == nil {
+		return defaultStr[0]
+	} else {
+		return value.ToString()
+	}
+}
+
+// 用于生成一个内容可以为空的字符串指针类型的Redis缓存键。
+func NullableStringKey(value *string, defaultStr ...string) string {
+	defaultStr = append(defaultStr, "UNDEF")
+	if value == nil {
+		return defaultStr[0]
+	}
+	return *value
+}