Интернет-магазин: Go, PostgreSQL 17 SSL, Caddy, Docker Compose

Co-authored-by: Cursor <cursoragent@cursor.com>

cmd/server/main.go

@@ -0,0 +1,136 @@
+package main
+
+import (
+	"context"
+	"html/template"
+	"io/fs"
+	"log"
+	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"shop/internal/config"
+	"shop/internal/database"
+	"shop/internal/handlers"
+	"shop/internal/repository"
+	"shop/internal/web"
+)
+
+func main() {
+	cfg, err := config.Load()
+	if err != nil {
+		log.Fatalf("config: %v", err)
+	}
+
+	ctx := context.Background()
+	pool, err := database.Connect(ctx, cfg.DatabaseURL)
+	if err != nil {
+		log.Fatalf("database: %v", err)
+	}
+	defer pool.Close()
+
+	tmpl, err := loadTemplates()
+	if err != nil {
+		log.Fatalf("templates: %v", err)
+	}
+
+	products := repository.NewProductRepository(pool)
+	home := handlers.NewHomeHandler(products, tmpl)
+
+	staticSub, err := fs.Sub(web.StaticFS, "static")
+	if err != nil {
+		log.Fatalf("static fs: %v", err)
+	}
+
+	mux := http.NewServeMux()
+	mux.Handle("GET /static/", http.StripPrefix("/static/", http.FileServer(http.FS(staticSub))))
+	mux.Handle("GET /health", http.HandlerFunc(handlers.Health))
+	mux.Handle("GET /", home)
+
+	srv := &http.Server{
+		Addr:         cfg.HTTPAddr,
+		Handler:      mux,
+		ReadTimeout:  cfg.ReadTimeout,
+		WriteTimeout: cfg.WriteTimeout,
+	}
+
+	go func() {
+		log.Printf("server listening on %s", cfg.HTTPAddr)
+		if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
+			log.Fatalf("listen: %v", err)
+		}
+	}()
+
+	quit := make(chan os.Signal, 1)
+	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
+	<-quit
+
+	shutdownCtx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+	if err := srv.Shutdown(shutdownCtx); err != nil {
+		log.Printf("shutdown: %v", err)
+	}
+}
+
+func loadTemplates() (*template.Template, error) {
+	funcMap := template.FuncMap{
+		"formatPrice": func(v float64) string {
+			return formatRub(v)
+		},
+	}
+	return template.New("").Funcs(funcMap).ParseFS(web.TemplatesFS, "templates/*.html")
+}
+
+func formatRub(v float64) string {
+	intPart := int64(v)
+	frac := int64((v - float64(intPart)) * 100)
+	if frac < 0 {
+		frac = -frac
+	}
+	return formatThousands(intPart) + "," + pad2(frac) + " ₽"
+}
+
+func formatThousands(n int64) string {
+	if n < 0 {
+		n = -n
+	}
+	s := ""
+	for n >= 1000 {
+		s = "," + pad3(n%1000) + s
+		n /= 1000
+	}
+	return itoa(n) + s
+}
+
+func pad3(n int64) string {
+	if n < 10 {
+		return "00" + itoa(n)
+	}
+	if n < 100 {
+		return "0" + itoa(n)
+	}
+	return itoa(n)
+}
+
+func pad2(n int64) string {
+	if n < 10 {
+		return "0" + itoa(n)
+	}
+	return itoa(n)
+}
+
+func itoa(n int64) string {
+	if n == 0 {
+		return "0"
+	}
+	var b [20]byte
+	i := len(b)
+	for n > 0 {
+		i--
+		b[i] = byte('0' + n%10)
+		n /= 10
+	}
+	return string(b[i:])
+}