From 7c21d579536f3804466f42f602c0d809ee723f58 Mon Sep 17 00:00:00 2001
From: Max Kellermann <max.kellermann@gmail.com>
Date: Wed, 10 Jul 2024 16:29:51 +0200
Subject: [PATCH] config/Block: add method GetDuration()

---
 src/config/Block.cxx | 24 ++++++++++++++++++++++++
 src/config/Block.hxx |  9 +++++++++
 2 files changed, 33 insertions(+)

diff --git a/src/config/Block.cxx b/src/config/Block.cxx
index aa18b8f0c..dead04269 100644
--- a/src/config/Block.cxx
+++ b/src/config/Block.cxx
@@ -46,6 +46,18 @@ BlockParam::GetBoolValue() const
 	return With(ParseBool);
 }
 
+std::chrono::steady_clock::duration
+BlockParam::GetDuration(std::chrono::steady_clock::duration min_value) const
+{
+	return With([min_value](const char *s){
+		auto duration = ParseDuration(s);
+		if (duration < min_value)
+			throw std::invalid_argument{"Value is too small"};
+
+		return duration;
+	});
+}
+
 const BlockParam *
 ConfigBlock::GetBlockParam(const char *name) const noexcept
 {
@@ -128,6 +140,18 @@ ConfigBlock::GetBlockValue(const char *name, bool default_value) const
 	return bp->GetBoolValue();
 }
 
+std::chrono::steady_clock::duration
+ConfigBlock::GetDuration(const char *name,
+			 std::chrono::steady_clock::duration min_value,
+			 std::chrono::steady_clock::duration default_value) const
+{
+	const BlockParam *bp = GetBlockParam(name);
+	if (bp == nullptr)
+		return default_value;
+
+	return bp->GetDuration(min_value);
+}
+
 void
 ConfigBlock::ThrowWithNested() const
 {
diff --git a/src/config/Block.hxx b/src/config/Block.hxx
index 5dc0bb588..384ff5c8e 100644
--- a/src/config/Block.hxx
+++ b/src/config/Block.hxx
@@ -4,6 +4,7 @@
 #pragma once
 
 #include <concepts>
+#include <chrono>
 #include <string>
 #include <vector>
 
@@ -33,6 +34,9 @@ struct BlockParam {
 
 	bool GetBoolValue() const;
 
+	std::chrono::steady_clock::duration
+	GetDuration(std::chrono::steady_clock::duration min_value) const;
+
 	/**
 	 * Call this method in a "catch" block to throw a nested
 	 * exception showing the location of this setting in the
@@ -122,6 +126,11 @@ struct ConfigBlock {
 
 	bool GetBlockValue(const char *name, bool default_value) const;
 
+	std::chrono::steady_clock::duration
+	GetDuration(const char *name,
+		    std::chrono::steady_clock::duration min_value,
+		    std::chrono::steady_clock::duration default_value) const;
+
 	/**
 	 * Call this method in a "catch" block to throw a nested
 	 * exception showing the location of this block in the