From 574056a7e39f51f82d4f16b78d5c5d62ab5872d1 Mon Sep 17 00:00:00 2001
From: yusing <yusing@6uo.me>
Date: Fri, 28 Mar 2025 07:47:58 +0800
Subject: [PATCH] metrics: metric utils

---
 internal/metrics/utils/utils.go | 36 +++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 internal/metrics/utils/utils.go

diff --git a/internal/metrics/utils/utils.go b/internal/metrics/utils/utils.go
new file mode 100644
index 00000000..2432b751
--- /dev/null
+++ b/internal/metrics/utils/utils.go
@@ -0,0 +1,36 @@
+package metricsutils
+
+import (
+	"net/url"
+	"strconv"
+	"time"
+)
+
+func CalculateBeginEnd(n, limit, offset int) (int, int, bool) {
+	if n == 0 || offset >= n {
+		return 0, 0, false
+	}
+	if limit == 0 {
+		limit = n
+	}
+	if offset+limit > n {
+		limit = n - offset
+	}
+	return offset, offset + limit, true
+}
+
+func QueryInt(query url.Values, key string, defaultValue int) int {
+	value, _ := strconv.Atoi(query.Get(key))
+	if value == 0 {
+		return defaultValue
+	}
+	return value
+}
+
+func QueryDuration(query url.Values, key string, defaultValue time.Duration) time.Duration {
+	value, _ := time.ParseDuration(query.Get(key))
+	if value == 0 {
+		return defaultValue
+	}
+	return value
+}