Split current conditions condition code querying

internal/adapters/outbound/postgres/conditions_read.go

@@ -9,6 +9,7 @@ import (
 	"fmt"
 
 	"gitea.maximumdirect.net/ejr/weatherapi/internal/app"
+	"gitea.maximumdirect.net/ejr/weatherfeeder/model"
 )
 
 func (r *Repository) CurrentConditions(ctx context.Context, observationWindowMinutes int) (*app.CurrentConditions, error) {
@@ -25,7 +26,6 @@ func (r *Repository) CurrentConditions(ctx context.Context, observationWindowMin
 		&row.RelativeHumidityPercent,
 		&row.WindSpeedKmh,
 		&row.WindDirectionDegrees,
-		&row.ConditionCode,
 		&row.IsDay,
 	)
 	if errors.Is(err, sql.ErrNoRows) {
@@ -35,5 +35,42 @@ func (r *Repository) CurrentConditions(ctx context.Context, observationWindowMin
 		return nil, fmt.Errorf("query current conditions: %w", err)
 	}
 
-	return mapCurrentConditionsRow(row), nil
+	if row.SampleCount == 0 {
+		return nil, nil
+	}
+
+	candidates, err := r.currentConditionsConditionCodeCandidates(ctx, observationWindowMinutes)
+	if err != nil {
+		return nil, err
+	}
+
+	return mapCurrentConditionsRow(row, selectCurrentConditionsConditionCode(candidates)), nil
+}
+
+func (r *Repository) currentConditionsConditionCodeCandidates(ctx context.Context, observationWindowMinutes int) ([]currentConditionsConditionCodeCandidate, error) {
+	rows, err := r.db.QueryContext(ctx, queryCurrentConditionsConditionCodeCandidates, observationWindowMinutes)
+	if err != nil {
+		return nil, fmt.Errorf("query current conditions condition code candidates: %w", err)
+	}
+	defer rows.Close()
+
+	var candidates []currentConditionsConditionCodeCandidate
+	for rows.Next() {
+		var (
+			eventSource   string
+			conditionCode int64
+		)
+		if err := rows.Scan(&eventSource, &conditionCode); err != nil {
+			return nil, fmt.Errorf("scan current conditions condition code candidate: %w", err)
+		}
+		candidates = append(candidates, currentConditionsConditionCodeCandidate{
+			EventSource:   eventSource,
+			ConditionCode: model.WMOCode(conditionCode),
+		})
+	}
+	if err := rows.Err(); err != nil {
+		return nil, fmt.Errorf("iterate current conditions condition code candidates: %w", err)
+	}
+
+	return candidates, nil
 }