From 2fb379b7dd0e0440680b3559e6aca8b42fd9ede1 Mon Sep 17 00:00:00 2001
From: Leonard Lyubich <leonard@nspcc.ru>
Date: Thu, 19 Nov 2020 15:41:10 +0300
Subject: [PATCH] [#188] shard: Define the enumeration of shard modes

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
---
 pkg/local_object_storage/shard/mode.go | 42 ++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 pkg/local_object_storage/shard/mode.go

diff --git a/pkg/local_object_storage/shard/mode.go b/pkg/local_object_storage/shard/mode.go
new file mode 100644
index 00000000..75377248
--- /dev/null
+++ b/pkg/local_object_storage/shard/mode.go
@@ -0,0 +1,42 @@
+package shard
+
+// Mode represents enumeration of Shard work modes.
+type Mode uint32
+
+// TODO: more detailed description of shard modes.
+
+const (
+	_ Mode = iota
+
+	// ModeActive is a Mode value for active shard.
+	ModeActive
+
+	// ModeInactive is a Mode value for inactive shard.
+	ModeInactive
+
+	// ModeReadOnly is a Mode value for read-only shard.
+	ModeReadOnly
+
+	// ModeFault is a Mode value for faulty shard.
+	ModeFault
+
+	// ModeEvacuate is a Mode value for evacuating shard.
+	ModeEvacuate
+)
+
+func (m Mode) String() string {
+	switch m {
+	default:
+		return "UNDEFINED"
+	case ModeActive:
+		return "ACTIVE"
+	case ModeInactive:
+		return "INACTIVE"
+	case ModeReadOnly:
+		return "READ_ONLY"
+	case ModeFault:
+		return "FAULT"
+	case ModeEvacuate:
+		return "EVACUATE"
+	}
+}