Alerting: Export pure function to convert query results to alert results (#85393)

Exported pure function to convert query results to alert results

pkg/services/ngalert/eval/eval.go

@@ -83,8 +83,7 @@ func (r *conditionEvaluator) Evaluate(ctx context.Context, now time.Time) (Resul
 	if err != nil {
 		return nil, err
 	}
-	execResults := queryDataResponseToExecutionResults(r.condition, response)
-	return evaluateExecutionResult(execResults, now), nil
+	return EvaluateAlert(response, r.condition, now), nil
 }
 
 type evaluatorImpl struct {
@@ -108,6 +107,12 @@ func NewEvaluatorFactory(
 	}
 }
 
+// EvaluateAlert takes the results of an executed query and evaluates it as an alert rule, returning alert states that the query produces.
+func EvaluateAlert(queryResponse *backend.QueryDataResponse, condition models.Condition, now time.Time) Results {
+	execResults := queryDataResponseToExecutionResults(condition, queryResponse)
+	return evaluateExecutionResult(execResults, now)
+}
+
 // invalidEvalResultFormatError is an error for invalid format of the alert definition evaluation results.
 type invalidEvalResultFormatError struct {
 	refID  string