Initialize project with basic structure, including Docker configuration, backend and frontend setup, environment configuration, and essential files for development.

backend/cmd/api/main.go

@@ -0,0 +1,111 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"log/slog"
+	"net/http"
+	"os"
+	"os/signal"
+	"strings"
+	"syscall"
+	"time"
+
+	"mixmaker/backend/internal/adapter/httpapi"
+	"mixmaker/backend/internal/adapter/postgres"
+	"mixmaker/backend/internal/application"
+	"mixmaker/backend/internal/realtime"
+)
+
+func main() {
+	ctx := context.Background()
+	databaseURL := required("DATABASE_URL")
+	if len(os.Args) > 1 && os.Args[1] == "migrate" {
+		dir := env("MIGRATIONS_DIR", "migrations")
+		if err := postgres.Migrate(ctx, databaseURL, dir); err != nil {
+			slog.Error("migration failed", "error", err)
+			os.Exit(1)
+		}
+		slog.Info("migrations applied")
+		return
+	}
+
+	store, err := postgres.Open(ctx, databaseURL)
+	if err != nil {
+		slog.Error("database connection failed", "error", err)
+		os.Exit(1)
+	}
+	defer store.Close()
+	hub := realtime.New()
+	service := application.New(store, hub)
+	cfg := httpapi.Config{
+		DiscordClientID:     required("DISCORD_CLIENT_ID"),
+		DiscordClientSecret: required("DISCORD_CLIENT_SECRET"),
+		DiscordRedirectURL:  required("DISCORD_REDIRECT_URL"),
+		FrontendURL:         env("FRONTEND_URL", "/"),
+		CookieName:          env("SESSION_COOKIE_NAME", "mixmaker_session"),
+		SecureCookies:       env("COOKIE_SECURE", "true") == "true",
+		SessionTTL:          durationEnv("SESSION_TTL", 7*24*time.Hour),
+		AdminDiscordIDs:     csvSet(os.Getenv("ADMIN_DISCORD_IDS")),
+	}
+	server := &http.Server{
+		Addr:              env("HTTP_ADDR", ":8080"),
+		Handler:           httpapi.New(service, store, hub, cfg),
+		ReadHeaderTimeout: 5 * time.Second,
+		IdleTimeout:       60 * time.Second,
+	}
+	go func() {
+		slog.Info("API listening", "address", server.Addr)
+		if err := server.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
+			slog.Error("server failed", "error", err)
+			os.Exit(1)
+		}
+	}()
+	stop, cancel := signal.NotifyContext(ctx, syscall.SIGINT, syscall.SIGTERM)
+	defer cancel()
+	<-stop.Done()
+	shutdownCtx, shutdownCancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer shutdownCancel()
+	if err := server.Shutdown(shutdownCtx); err != nil {
+		slog.Error("graceful shutdown failed", "error", err)
+	}
+}
+
+func required(key string) string {
+	value := os.Getenv(key)
+	if value == "" {
+		slog.Error("required environment variable missing", "key", key)
+		os.Exit(2)
+	}
+	return value
+}
+
+func env(key, fallback string) string {
+	if value := os.Getenv(key); value != "" {
+		return value
+	}
+	return fallback
+}
+
+func csvSet(value string) map[string]bool {
+	out := make(map[string]bool)
+	for _, item := range strings.Split(value, ",") {
+		if item = strings.TrimSpace(item); item != "" {
+			out[item] = true
+		}
+	}
+	return out
+}
+
+func durationEnv(key string, fallback time.Duration) time.Duration {
+	value := os.Getenv(key)
+	if value == "" {
+		return fallback
+	}
+	parsed, err := time.ParseDuration(value)
+	if err != nil || parsed <= 0 {
+		slog.Error("invalid duration environment variable", "key", key, "value", value)
+		os.Exit(2)
+	}
+	return parsed
+}