tsk-19: Update status of scheduled message endpoint (#32)

Closes #19

Reviewed-on: phoenix/textsender-api#32
Co-authored-by: phoenix <kundeng00@pm.me>
Co-committed-by: phoenix <kundeng00@pm.me>

internal/store/scheduled_message_event_store.go

@@ -13,6 +13,7 @@ import (
 
 type ScheduledMessageEventStore interface {
 	Get(ctx context.Context, id uuid.UUID) (*scheduling.ScheduledMessageEvent, error)
+	GetWithScheduleMessageId(ctx context.Context, schMsgId uuid.UUID) ([]*scheduling.ScheduledMessageEvent, error)
 	Delete(ctx context.Context, id uuid.UUID) error
 	CreateScheduledMessageEvent(ctx context.Context, event *scheduling.ScheduledMessageEvent) error
 	Exists(ctx context.Context, event *scheduling.ScheduledMessageEvent) (bool, error)
@@ -43,6 +44,34 @@ func (s *PGScheduledMessageEventStore) Get(ctx context.Context, id uuid.UUID) (*
 	}
 }
 
+func (s *PGScheduledMessageEventStore) GetWithScheduleMessageId(ctx context.Context, schMsgId uuid.UUID) ([]*scheduling.ScheduledMessageEvent, error) {
+	var events []*scheduling.ScheduledMessageEvent
+	query := `SELECT id, recipient_id, message_id, scheduled_message_id, created FROM scheduled_message_events WHERE scheduled_message_id = $1
+	`
+
+	rows, err := s.db.Query(ctx, query, schMsgId)
+
+	if err != nil {
+		return nil, fmt.Errorf("Error retrieving rows from scheduled_message_Events: %w", err)
+	}
+
+	for rows.Next() {
+		var event scheduling.ScheduledMessageEvent
+
+		if err := rows.Scan(&event.Id, &event.RecipientId, &event.MessageId, &event.ScheduledMessageId, &event.Created); err != nil {
+			return nil, fmt.Errorf("Error fetching data from row: %w", err)
+		} else {
+			events = append(events, &event)
+		}
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	return events, nil
+}
+
 func (s *PGScheduledMessageEventStore) Delete(ctx context.Context, id uuid.UUID) error {
 	query := `
 		DELETE FROM scheduled_message_events WHERE id = $1