Add admin panel: visit counter, product editor, screenshots upload

internal/repository/stats.go

@@ -0,0 +1,50 @@
+package repository
+
+import (
+	"context"
+	"errors"
+
+	"github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/pgxpool"
+
+	"shop/internal/models"
+)
+
+type StatsRepository struct {
+	pool *pgxpool.Pool
+}
+
+func NewStatsRepository(pool *pgxpool.Pool) *StatsRepository {
+	return &StatsRepository{pool: pool}
+}
+
+func (r *StatsRepository) IncrementHomeVisit(ctx context.Context) error {
+	_, err := r.pool.Exec(ctx, `
+		INSERT INTO site_stats (id, total_visits, today_visits, visit_date)
+		VALUES (1, 1, 1, CURRENT_DATE)
+		ON CONFLICT (id) DO UPDATE SET
+			total_visits = site_stats.total_visits + 1,
+			today_visits = CASE
+				WHEN site_stats.visit_date = CURRENT_DATE THEN site_stats.today_visits + 1
+				ELSE 1
+			END,
+			visit_date = CURRENT_DATE
+	`)
+	return err
+}
+
+func (r *StatsRepository) Get(ctx context.Context) (models.SiteStats, error) {
+	var s models.SiteStats
+	err := r.pool.QueryRow(ctx, `
+		SELECT total_visits,
+		       CASE WHEN visit_date = CURRENT_DATE THEN today_visits ELSE 0 END
+		FROM site_stats WHERE id = 1
+	`).Scan(&s.TotalVisits, &s.TodayVisits)
+	if errors.Is(err, pgx.ErrNoRows) {
+		return models.SiteStats{}, nil
+	}
+	if err != nil {
+		return models.SiteStats{}, err
+	}
+	return s, nil
+}