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package main
import (
"context"
"embed"
"errors"
"flag"
"fmt"
"log/slog"
"net/http"
"os"
"os/signal"
"strconv"
"syscall"
"git.anhgelus.world/anhgelus/small-world/backend"
"github.com/joho/godotenv"
)
//go:embed dist
var embeds embed.FS
var (
configFile = "config.toml"
port = 8000
publicDir = "public"
dev = false
)
func init() {
err := godotenv.Load(".env")
if err != nil && !errors.Is(err, os.ErrNotExist) {
slog.Error("loading .env", "error", err)
}
if v := os.Getenv("CONFIG_FILE"); v != "" {
configFile = v
}
flag.StringVar(&configFile, "config", configFile, "config file")
if v := os.Getenv("PORT"); v != "" {
port, err = strconv.Atoi(v)
if err != nil {
panic(err)
}
}
flag.IntVar(&port, "port", port, "server port")
if v := os.Getenv("PUBLIC_DIR"); v != "" {
publicDir = v
}
flag.StringVar(&publicDir, "public", publicDir, "public directory")
flag.BoolVar(&dev, "dev", false, "development mode")
}
func main() {
flag.Parse()
backend.SetupLogger(dev)
cfg, ok := backend.LoadConfig(configFile)
if !ok {
slog.Info("exiting")
os.Exit(1)
}
if ok = backend.LoadLogs(cfg); !ok {
slog.Info("exiting")
os.Exit(2)
}
r := backend.NewRouter(dev, cfg)
backend.HandleHome(r)
backend.HandleLogs(r)
backend.HandleStaticFiles(r, "/assets", backend.UsableEmbedFS("dist", embeds))
backend.HandleStaticFiles(r, "/static", os.DirFS(publicDir))
slog.Info("starting http server")
server := &http.Server{Addr: fmt.Sprintf(":%d", port), Handler: r}
errChan := make(chan error)
go startServer(server, errChan)
sc := make(chan os.Signal, 1)
signal.Notify(sc, syscall.SIGINT, syscall.SIGTERM, os.Interrupt)
ok = true
for ok {
select {
case err := <-errChan:
slog.Error("http server running", "error", err)
slog.Info("restarting the server")
go startServer(server, errChan)
case <-sc:
err := server.Shutdown(context.Background())
if err != nil {
slog.Error("closing http server", "error", err)
}
ok = false
}
}
slog.Info("http server stopped")
}
func startServer(server *http.Server, errChan chan error) {
err := server.ListenAndServe()
if err != nil && !errors.Is(err, http.ErrServerClosed) {
errChan <- err
}
}
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