initial boilerplate

cmd/server/main.go

@@ -0,0 +1,119 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"log/slog"
+	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"github.com/go-chi/chi/v5"
+	"github.com/go-chi/chi/v5/middleware"
+	"github.com/go-chi/cors"
+	"github.com/joho/godotenv"
+
+	"github.com/yourname/deflated/internal/db"
+	"github.com/yourname/deflated/internal/handlers"
+)
+
+func main() {
+	// Load .env file if present (ignored in production)
+	_ = godotenv.Load()
+
+	// Structured logger — prints human-readable text locally, JSON in prod
+	logger := slog.New(slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{
+		Level: slog.LevelDebug,
+	}))
+	slog.SetDefault(logger)
+
+	// Connect to Postgres
+	pool, err := db.Connect(os.Getenv("DATABASE_URL"))
+	if err != nil {
+		slog.Error("failed to connect to database", "error", err)
+		os.Exit(1)
+	}
+	defer pool.Close()
+
+	// Run migrations on startup
+	if err := db.Migrate(pool); err != nil {
+		slog.Error("failed to run migrations", "error", err)
+		os.Exit(1)
+	}
+
+	// Wire up dependencies
+	queries := db.New(pool)
+	receiptHandler := handlers.NewReceiptHandler(queries)
+	itemHandler := handlers.NewItemHandler(queries)
+
+	// Build router
+	r := chi.NewRouter()
+
+	// Middleware stack (runs for every request, in order)
+	r.Use(middleware.RequestID)   // adds X-Request-ID header
+	r.Use(middleware.RealIP)      // reads X-Forwarded-For for real client IP
+	r.Use(middleware.Logger)      // logs method, path, status, duration
+	r.Use(middleware.Recoverer)   // catches panics, returns 500 instead of crashing
+	r.Use(middleware.Compress(5)) // gzip responses
+
+	r.Use(cors.Handler(cors.Options{
+		AllowedOrigins: []string{"http://localhost:5173", os.Getenv("FRONTEND_URL")},
+		AllowedMethods: []string{"GET", "POST", "OPTIONS"},
+		AllowedHeaders: []string{"Accept", "Content-Type"},
+	}))
+
+	// Routes
+	r.Get("/health", func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusOK)
+		fmt.Fprint(w, "ok")
+	})
+
+	r.Route("/api", func(r chi.Router) {
+		r.Post("/receipts", receiptHandler.Submit)
+		r.Get("/receipts/{id}", receiptHandler.Get)
+
+		r.Get("/items", itemHandler.List)
+		r.Get("/items/{name}/history", itemHandler.PriceHistory)
+		r.Get("/items/top-movers", itemHandler.TopMovers)
+
+		r.Get("/inflation/summary", itemHandler.InflationSummary)
+	})
+
+	// Server with graceful shutdown
+	port := os.Getenv("PORT")
+	if port == "" {
+		port = "8080"
+	}
+
+	srv := &http.Server{
+		Addr:         ":" + port,
+		Handler:      r,
+		ReadTimeout:  15 * time.Second,
+		WriteTimeout: 30 * time.Second,
+		IdleTimeout:  60 * time.Second,
+	}
+
+	// Start server in background goroutine
+	go func() {
+		slog.Info("server starting", "port", port)
+		if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
+			slog.Error("server error", "error", err)
+			os.Exit(1)
+		}
+	}()
+
+	// Block until SIGINT or SIGTERM (Ctrl+C or `docker stop`)
+	quit := make(chan os.Signal, 1)
+	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
+	<-quit
+
+	slog.Info("shutting down gracefully...")
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	if err := srv.Shutdown(ctx); err != nil {
+		slog.Error("forced shutdown", "error", err)
+	}
+}