Add full shop application: Go backend, PostgreSQL, Docker, Caddy and admin panel.

internal/repository/product.go

@@ -0,0 +1,64 @@
+package repository
+
+import (
+	"context"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+
+	"shop/internal/models"
+)
+
+type ProductRepository struct {
+	pool *pgxpool.Pool
+}
+
+func NewProductRepository(pool *pgxpool.Pool) *ProductRepository {
+	return &ProductRepository{pool: pool}
+}
+
+func (r *ProductRepository) Featured(ctx context.Context, limit int) ([]models.Product, error) {
+	rows, err := r.pool.Query(ctx, `
+		SELECT id, name, description, price, image_url, category, created_at
+		FROM products
+		ORDER BY created_at DESC
+		LIMIT $1
+	`, limit)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var products []models.Product
+	for rows.Next() {
+		var p models.Product
+		if err := rows.Scan(&p.ID, &p.Name, &p.Description, &p.Price, &p.ImageURL, &p.Category, &p.CreatedAt); err != nil {
+			return nil, err
+		}
+		products = append(products, p)
+	}
+	return products, rows.Err()
+}
+
+func (r *ProductRepository) Categories(ctx context.Context) ([]models.Category, error) {
+	rows, err := r.pool.Query(ctx, `
+		SELECT category, COUNT(*) AS cnt
+		FROM products
+		GROUP BY category
+		ORDER BY cnt DESC
+	`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var categories []models.Category
+	for rows.Next() {
+		var c models.Category
+		if err := rows.Scan(&c.Name, &c.Count); err != nil {
+			return nil, err
+		}
+		c.Slug = c.Name
+		categories = append(categories, c)
+	}
+	return categories, rows.Err()
+}