From 32dd0bb3f9c5c6c444473f6a7ef0f3dd3ed6b201 Mon Sep 17 00:00:00 2001
From: Leonard Lyubich <leonard@nspcc.ru>
Date: Tue, 25 Jan 2022 15:11:32 +0300
Subject: [PATCH] [#369] status: Support WRONG_MAGIC_NUMBER code and detail

Define constant for `WrongMagicNumber` local code. Define constant
`DetailIDCorrect` for correct magic detail. Add `ResetDetails`
and `AppendDetails` method pair. Replace `SetDetails` method with new
`SetStatusDetails` function which can be implemented using new methods.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
---
 status/details.go       |  8 ++++++++
 status/status.go        |  2 ++
 status/test/generate.go |  2 +-
 status/types.go         | 19 ++++++++++++++++---
 4 files changed, 27 insertions(+), 4 deletions(-)
 create mode 100644 status/details.go

diff --git a/status/details.go b/status/details.go
new file mode 100644
index 0000000..5b8f460
--- /dev/null
+++ b/status/details.go
@@ -0,0 +1,8 @@
+package status
+
+// details for WrongMagicNumber code.
+const (
+	// DetailIDCorrectMagic is an identifier of details with correct network magic
+	// which can be attached to WrongMagicNumber code.
+	DetailIDCorrectMagic = iota
+)
diff --git a/status/status.go b/status/status.go
index d24ce57..4b1f370 100644
--- a/status/status.go
+++ b/status/status.go
@@ -57,6 +57,8 @@ const (
 const (
 	// Internal is a local Code value for INTERNAL failure status.
 	Internal Code = iota
+	// WrongMagicNumber is a local Code value for WRONG_MAGIC_NUMBER failure status.
+	WrongMagicNumber
 )
 
 const (
diff --git a/status/test/generate.go b/status/test/generate.go
index c8b5a66..1861212 100644
--- a/status/test/generate.go
+++ b/status/test/generate.go
@@ -37,7 +37,7 @@ func Status(empty bool) *status.Status {
 	if !empty {
 		m.SetCode(765)
 		m.SetMessage("some string")
-		m.SetDetails(Details(false))
+		status.SetStatusDetails(m, Details(false))
 	}
 
 	return m
diff --git a/status/types.go b/status/types.go
index 3e907d8..61a05d0 100644
--- a/status/types.go
+++ b/status/types.go
@@ -106,9 +106,22 @@ func (x *Status) IterateDetails(f func(*Detail) bool) {
 	}
 }
 
-// SetDetails sets Detail list of the Status.
-func (x *Status) SetDetails(v []*Detail) {
+// ResetDetails empties the detail list.
+func (x *Status) ResetDetails() {
 	if x != nil {
-		x.details = v
+		x.details = x.details[:0]
 	}
 }
+
+// AppendDetails appends the list of details to the Status.
+func (x *Status) AppendDetails(ds ...*Detail) {
+	if x != nil {
+		x.details = append(x.details, ds...)
+	}
+}
+
+// SetStatusDetails sets Detail list of the Status.
+func SetStatusDetails(dst *Status, ds []*Detail) {
+	dst.ResetDetails()
+	dst.AppendDetails(ds...)
+}