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package api
import (
"context"
"net/http"
"strings"
"codeberg.org/snonux/player/internal/auth"
"codeberg.org/snonux/player/internal/model"
)
type ctxKey int
const (
sessionCtxKey ctxKey = iota
userCtxKey
)
// UserStore is the narrow interface Middleware needs for user lookups.
type UserStore interface {
CountUsers(ctx context.Context) (int, error)
GetUserByID(ctx context.Context, id int64) (*model.User, error)
}
// Middleware holds dependencies for middleware constructors.
type Middleware struct {
store UserStore
sm *auth.SessionManager
}
// NewMiddleware creates middleware handlers.
func NewMiddleware(store UserStore, sm *auth.SessionManager) *Middleware {
return &Middleware{store: store, sm: sm}
}
// RequireSession validates the session cookie and injects the session into request context.
// For HTML page requests (Accept: text/html), redirects to /login.html instead of returning 401.
func (mw *Middleware) RequireSession(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
cookie, err := r.Cookie("session")
if err != nil {
if wantsHTML(r) {
http.Redirect(w, r, "/login.html", http.StatusTemporaryRedirect)
return
}
http.Error(w, "unauthorized", http.StatusUnauthorized)
return
}
sess, err := mw.sm.ValidateSession(r.Context(), cookie.Value)
if err != nil || sess == nil {
if wantsHTML(r) {
http.Redirect(w, r, "/login.html", http.StatusTemporaryRedirect)
return
}
http.Error(w, "unauthorized", http.StatusUnauthorized)
return
}
ctx := context.WithValue(r.Context(), sessionCtxKey, sess)
next.ServeHTTP(w, r.WithContext(ctx))
})
}
// wantsHTML returns true if the request appears to be from a browser expecting an HTML page.
func wantsHTML(r *http.Request) bool {
accept := r.Header.Get("Accept")
return strings.Contains(accept, "text/html")
}
// RequireAdmin ensures the authenticated user is an admin.
func (mw *Middleware) RequireAdmin(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
sess, ok := r.Context().Value(sessionCtxKey).(*model.Session)
if !ok || sess == nil {
http.Error(w, "unauthorized", http.StatusUnauthorized)
return
}
user, err := mw.store.GetUserByID(r.Context(), sess.UserID)
if err != nil || user == nil || !user.IsAdmin {
http.Error(w, "forbidden", http.StatusForbidden)
return
}
ctx := context.WithValue(r.Context(), userCtxKey, user)
next.ServeHTTP(w, r.WithContext(ctx))
})
}
// BootstrapRedirect redirects all requests to /bootstrap.html when no users exist.
func (mw *Middleware) BootstrapRedirect(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if isBootstrapPublic(r.URL.Path) {
next.ServeHTTP(w, r)
return
}
count, err := mw.store.CountUsers(r.Context())
if err != nil {
http.Error(w, "internal server error", http.StatusInternalServerError)
return
}
if count == 0 {
http.Redirect(w, r, "/bootstrap.html", http.StatusTemporaryRedirect)
return
}
next.ServeHTTP(w, r)
})
}
func isBootstrapPublic(path string) bool {
switch path {
case "/bootstrap.html", "/api/bootstrap", "/login.html", "/api/login", "/healthz", "/readyz",
"/favicon.svg", "/manifest.json", "/sw.js":
return true
}
if strings.HasPrefix(path, "/css/") || strings.HasPrefix(path, "/js/") || strings.HasPrefix(path, "/images/") {
return true
}
return false
}
|
