tsk-20: Add event to scheduled message (#23)

Closes #20

Reviewed-on: phoenix/textsender-api#23
Co-authored-by: phoenix <kundeng00@pm.me>
Co-committed-by: phoenix <kundeng00@pm.me>

internal/store/scheduled_message_event_store.go

@@ -0,0 +1,47 @@
+package store
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+
+	"git.kundeng.us/phoenix/textsender-models/pkg/message/scheduling"
+)
+
+type ScheduledMessageEventStore interface {
+	CreateScheduledMessageEvent(ctx context.Context, event *scheduling.ScheduledMessageEvent) error
+	Exists(ctx context.Context, event *scheduling.ScheduledMessageEvent) (bool, error)
+}
+
+type PGScheduledMessageEventStore struct {
+	db *pgxpool.Pool
+}
+
+func NewScheduledMessageEventStore(db *pgxpool.Pool) *PGScheduledMessageEventStore {
+	return &PGScheduledMessageEventStore{db: db}
+}
+
+func (s *PGScheduledMessageEventStore) CreateScheduledMessageEvent(ctx context.Context, event *scheduling.ScheduledMessageEvent) error {
+	query := `
+		INSERT INTO scheduled_message_events (recipient_id, message_id, scheduled_message_id)
+		VALUES ($1, $2, $3)
+		RETURNING id, created
+	`
+
+	return s.db.QueryRow(ctx, query, event.RecipientId, event.MessageId, event.ScheduledMessageId).Scan(
+		&event.Id, &event.Created,
+	)
+}
+
+func (s *PGScheduledMessageEventStore) Exists(ctx context.Context, event *scheduling.ScheduledMessageEvent) (bool, error) {
+	query := `SELECT EXISTS(SELECT 1 FROM scheduled_message_events WHERE scheduled_message_id = $1 AND recipient_id = $2)`
+
+	var exists bool
+	err := s.db.QueryRow(ctx, query, event.ScheduledMessageId, event.RecipientId).Scan(&exists)
+	if err != nil {
+		return false, fmt.Errorf("Scheduled message event does not exist: %w", err)
+	} else {
+		return exists, nil
+	}
+}

internal/store/scheduled_message_store.go

@@ -2,10 +2,7 @@ package store
 
 import (
 	"context"
-	// "fmt"
 
-	// "github.com/google/uuid"
-	// "github.com/jackc/pgx/v5"
 	"github.com/jackc/pgx/v5/pgxpool"
 
 	"git.kundeng.us/phoenix/textsender-models/pkg/message/scheduling"