From d651c6fb097d5b7e6cd08946172e31e355c4c9dd Mon Sep 17 00:00:00 2001
From: nikkiing <1031497516@qq.com>
Date: Wed, 19 Apr 2023 17:07:26 +0800
Subject: [PATCH] PageToSlice

---
 pagination/v1/pagination.go | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/pagination/v1/pagination.go b/pagination/v1/pagination.go
index 089a284..e880d6a 100644
--- a/pagination/v1/pagination.go
+++ b/pagination/v1/pagination.go
@@ -21,6 +21,36 @@ type Integer interface {
 	~int | ~int32
 }
 
+// 用于对一个切片分页
+func PageToSlice[T ~int](page, pageSize, total T) (begin, end T) {
+	if page < DefaultPage {
+		page = DefaultPage
+	}
+
+	if pageSize <= MinPageSize {
+		pageSize = MinPageSize
+	}
+
+	if pageSize >= MaxPageSize {
+		pageSize = MaxPageSize
+	}
+
+	// 计算总页数
+	totalPage := (total / pageSize) + 1
+	if page > totalPage {
+		page = totalPage
+	}
+
+	begin = (page - 1) * pageSize
+	if total-begin <= pageSize {
+		end = total
+	} else {
+		end = begin + pageSize
+	}
+	return
+}
+
+// 用于分页查询
 func PageToOffset[T Integer](page, pageSize T) (offset, limit T) {
 	if page < DefaultPage {
 		page = DefaultPage