feat: add integrated web frontend

internal/app/app.go

@@ -3,6 +3,9 @@ package app
 import (
 	"context"
 	"net/http"
+	"os"
+	"path/filepath"
+	"strings"
 	"time"
 
 	"git.118im.com/im_team/im_workbench/internal/accounts"
@@ -19,9 +22,10 @@ import (
 )
 
 type App struct {
-	store *store.Store
-	redis *redis.Client
-	api   *httpapi.API
+	store        *store.Store
+	redis        *redis.Client
+	api          *httpapi.API
+	frontendPath string
 }
 
 func New(cfg *config.Config) (*App, error) {
@@ -45,17 +49,47 @@ func New(cfg *config.Config) (*App, error) {
 	taskService := tasks.New(st)
 	mallService := mall.New(st)
 	financeService := finance.New(st, redisClient, cfg.Auth)
-	return &App{store: st, redis: redisClient, api: httpapi.New(authenticator, accountService, portalService, taskService, mallService, financeService)}, nil
+	return &App{store: st, redis: redisClient, api: httpapi.New(authenticator, accountService, portalService, taskService, mallService, financeService), frontendPath: cfg.FrontendDir}, nil
 }
 
 func (a *App) Handler() http.Handler {
 	mux := http.NewServeMux()
+	if a.frontendDir() != "" {
+		mux.Handle("/admin", frontendHandler(a.frontendDir()))
+		mux.Handle("/admin/", frontendHandler(a.frontendDir()))
+	}
 	mux.HandleFunc("/healthz", a.api.Healthz)
 	mux.Handle("/metrics", promhttp.Handler())
 	a.api.Register(mux)
 	return mux
 }
 
+func (a *App) frontendDir() string {
+	if dir := strings.TrimSpace(os.Getenv("WORKBENCH_FRONTEND_DIR")); dir != "" {
+		return dir
+	}
+	return strings.TrimSpace(a.frontendPath)
+}
+
+func frontendHandler(dir string) http.Handler {
+	files := http.FileServer(http.Dir(dir))
+	index := filepath.Join(dir, "index.html")
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		path := strings.TrimPrefix(r.URL.Path, "/admin")
+		if path == "" {
+			path = "/"
+		}
+		candidate := filepath.Join(dir, filepath.Clean(path))
+		if info, err := os.Stat(candidate); err == nil && !info.IsDir() {
+			r2 := r.Clone(r.Context())
+			r2.URL.Path = path
+			files.ServeHTTP(w, r2)
+			return
+		}
+		http.ServeFile(w, r, index)
+	})
+}
+
 func (a *App) Close() {
 	if a.redis != nil {
 		_ = a.redis.Close()