From 4cff7748af65038db3754ab9ce157d528f03a474 Mon Sep 17 00:00:00 2001
From: Anhgelus Morhtuuzh <william@herges.fr>
Date: Thu, 2 Oct 2025 16:04:35 +0200
Subject: feat(backend): simple http server

---
 README.md         |  3 +++
 backend/router.go | 24 +++++++++++++++++++++++
 go.mod            |  5 +++++
 go.sum            |  4 ++++
 main.go           | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 93 insertions(+)
 create mode 100644 backend/router.go
 create mode 100644 go.sum
 create mode 100644 main.go

diff --git a/README.md b/README.md
index 1eddd2b..4f7af90 100644
--- a/README.md
+++ b/README.md
@@ -32,3 +32,6 @@ This project uses a custom markdown parser.
 It is located in `markdown`.
 I made my custom parser because I have extended its specification.
 
+The backend is in `backend`.
+It uses `github.com/go-chi/chi/v5`.
+
diff --git a/backend/router.go b/backend/router.go
new file mode 100644
index 0000000..6c7f9f8
--- /dev/null
+++ b/backend/router.go
@@ -0,0 +1,24 @@
+package backend
+
+import (
+	"net/http"
+	"time"
+
+	"github.com/go-chi/chi/v5"
+	"github.com/go-chi/chi/v5/middleware"
+)
+
+func NewRouter() *chi.Mux {
+	r := chi.NewRouter()
+
+	r.Use(middleware.Timeout(30 * time.Second))
+	r.Use(middleware.Logger)
+
+	r.Get("/", func(w http.ResponseWriter, r *http.Request) {
+		_, err := w.Write([]byte("Hello World"))
+		if err != nil {
+			panic(err)
+		}
+	})
+	return r
+}
diff --git a/go.mod b/go.mod
index 37b3f25..38c749b 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,8 @@
 module git.anhgelus.world/anhgelus/small-world
 
 go 1.25.1
+
+require (
+	github.com/go-chi/chi/v5 v5.2.3 // indirect
+	github.com/joho/godotenv v1.5.1 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..fe271b4
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,4 @@
+github.com/go-chi/chi/v5 v5.2.3 h1:WQIt9uxdsAbgIYgid+BpYc+liqQZGMHRaUwp0JUcvdE=
+github.com/go-chi/chi/v5 v5.2.3/go.mod h1:L2yAIGWB3H+phAw1NxKwWM+7eUH/lU8pOMm5hHcoops=
+github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
+github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..a277761
--- /dev/null
+++ b/main.go
@@ -0,0 +1,57 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"log/slog"
+	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"git.anhgelus.world/anhgelus/small-world/backend"
+	"github.com/joho/godotenv"
+)
+
+func init() {
+	err := godotenv.Load(".env")
+	if err != nil && !errors.Is(err, os.ErrNotExist) {
+		slog.Error("loading .env", "error", err)
+	}
+}
+func main() {
+	r := backend.NewRouter()
+
+	slog.Info("starting http server")
+	server := &http.Server{Addr: ":8000", 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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