Alerting: Update state manager to change all current states in the case when Error\NoData is executed as Ok\Nomal (#68142)

pkg/services/ngalert/eval/eval.go

@@ -142,6 +142,7 @@ type ExecutionResults struct {
 // Results is a slice of evaluated alert instances states.
 type Results []Result
 
+// HasErrors returns true when Results contains at least one element with error
 func (evalResults Results) HasErrors() bool {
 	for _, r := range evalResults {
 		if r.State == Error {
@@ -151,6 +152,26 @@ func (evalResults Results) HasErrors() bool {
 	return false
 }
 
+// HasErrors returns true when Results contains at least one element and all elements are errors
+func (evalResults Results) IsError() bool {
+	for _, r := range evalResults {
+		if r.State != Error {
+			return false
+		}
+	}
+	return len(evalResults) > 0
+}
+
+// IsNoData returns true when all items are NoData or Results is empty
+func (evalResults Results) IsNoData() bool {
+	for _, result := range evalResults {
+		if result.State != NoData {
+			return false
+		}
+	}
+	return true
+}
+
 // Result contains the evaluated State of an alert instance
 // identified by its labels.
 type Result struct {