Move Moira states to separate file, make types for it

state.go

@@ -0,0 +1,58 @@
+package moira
+
+type State string
+
+type TtlState string
+
+// Default moira triggers and metrics states
+const (
+	StateOK     State = "OK"
+	StateWARN   State = "WARN"
+	StateERROR  State = "ERROR"
+	StateNODATA State = "NODATA"
+	// Use this for trigger check unexpected errors
+	StateEXCEPTION State = "EXCEPTION"
+	// Use this only for test notifications
+	StateTEST State = "TEST"
+)
+
+// Moira ttl states
+const (
+	TTLStateOK     TtlState = "OK"
+	TTLStateWARN   TtlState = "WARN"
+	TTLStateERROR  TtlState = "ERROR"
+	TTLStateNODATA TtlState = "NODATA"
+	TTLStateDEL    TtlState = "DEL"
+)
+
+var (
+	eventStatesPriority = [...]State{StateOK, StateWARN, StateERROR, StateNODATA, StateEXCEPTION, StateTEST}
+	stateScore          = map[State]int64{
+		StateOK:        0,
+		StateWARN:      1,
+		StateERROR:     100,
+		StateNODATA:    1000,
+		StateEXCEPTION: 100000,
+	}
+	eventStateWeight1 = map[State]int{
+		StateOK:     0,
+		StateWARN:   1,
+		StateERROR:  100,
+		StateNODATA: 10000,
+	}
+)
+
+func (state TtlState) ToMetricState() State {
+	if state == TTLStateDEL {
+		return StateNODATA
+	}
+	return State(state)
+}
+
+// ToTriggerState is an auxiliary function to handle trigger state properly.
+func (state TtlState) ToTriggerState() State {
+	if state == TTLStateDEL {
+		return StateOK
+	}
+	return State(state)
+}

state_test.go

@@ -0,0 +1,27 @@
+package moira
+
+import (
+	"testing"
+
+	. "github.com/smartystreets/goconvey/convey"
+)
+
+func TestTtlState_ToMetricState(t *testing.T) {
+	Convey("ToMetricState test", t, func() {
+		So(TTLStateDEL.ToMetricState(), ShouldResemble, StateNODATA)
+		So(TTLStateOK.ToMetricState(), ShouldResemble, StateOK)
+		So(TTLStateWARN.ToMetricState(), ShouldResemble, StateWARN)
+		So(TTLStateERROR.ToMetricState(), ShouldResemble, StateERROR)
+		So(TTLStateNODATA.ToMetricState(), ShouldResemble, StateNODATA)
+	})
+}
+
+func TestTtlState_ToTriggerState(t *testing.T) {
+	Convey("ToTriggerState test", t, func() {
+		So(TTLStateDEL.ToTriggerState(), ShouldResemble, StateOK)
+		So(TTLStateOK.ToTriggerState(), ShouldResemble, StateOK)
+		So(TTLStateWARN.ToTriggerState(), ShouldResemble, StateWARN)
+		So(TTLStateERROR.ToTriggerState(), ShouldResemble, StateERROR)
+		So(TTLStateNODATA.ToTriggerState(), ShouldResemble, StateNODATA)
+	})
+}