add invite to space feature

internal/handler/space.go

@@ -20,14 +20,16 @@ type SpaceHandler struct {
 	tagService     *service.TagService
 	listService    *service.ShoppingListService
 	expenseService *service.ExpenseService
+	inviteService  *service.InviteService
 }
 
-func NewSpaceHandler(ss *service.SpaceService, ts *service.TagService, sls *service.ShoppingListService, es *service.ExpenseService) *SpaceHandler {
+func NewSpaceHandler(ss *service.SpaceService, ts *service.TagService, sls *service.ShoppingListService, es *service.ExpenseService, is *service.InviteService) *SpaceHandler {
 	return &SpaceHandler{
 		spaceService:   ss,
 		tagService:     ts,
 		listService:    sls,
 		expenseService: es,
+		inviteService:  is,
 	}
 }
 
@@ -353,3 +355,57 @@ func (h *SpaceHandler) CreateExpense(w http.ResponseWriter, r *http.Request) {
 
 	ui.Render(w, r, pages.ExpenseCreatedResponse(newExpense, balance))
 }
+
+func (h *SpaceHandler) CreateInvite(w http.ResponseWriter, r *http.Request) {
+	spaceID := r.PathValue("spaceID")
+	user := ctxkeys.User(r.Context())
+
+	if err := r.ParseForm(); err != nil {
+		http.Error(w, "Bad Request", http.StatusBadRequest)
+		return
+	}
+
+	email := r.FormValue("email")
+	if email == "" {
+		http.Error(w, "Email is required", http.StatusBadRequest)
+		return
+	}
+
+	_, err := h.inviteService.CreateInvite(spaceID, user.ID, email)
+	if err != nil {
+		slog.Error("failed to create invite", "error", err, "space_id", spaceID)
+		http.Error(w, "Failed to create invite", http.StatusInternalServerError)
+		return
+	}
+
+	// TODO: Return a nice UI response (toast or list update)
+	w.Write([]byte("Invitation sent!"))
+}
+
+func (h *SpaceHandler) JoinSpace(w http.ResponseWriter, r *http.Request) {
+	token := r.PathValue("token")
+	user := ctxkeys.User(r.Context())
+
+	if user != nil {
+		spaceID, err := h.inviteService.AcceptInvite(token, user.ID)
+		if err != nil {
+			slog.Error("failed to accept invite", "error", err, "token", token)
+			http.Error(w, "Failed to join space: "+err.Error(), http.StatusBadRequest)
+			return
+		}
+
+		http.Redirect(w, r, "/app/spaces/"+spaceID, http.StatusSeeOther)
+		return
+	}
+
+	// Not logged in: set cookie and redirect to auth
+	http.SetCookie(w, &http.Cookie{
+		Name:     "pending_invite",
+		Value:    token,
+		Path:     "/",
+		Expires:  time.Now().Add(1 * time.Hour),
+		HttpOnly: true,
+		SameSite: http.SameSiteLaxMode,
+	})
+	http.Redirect(w, r, "/auth?invite=true", http.StatusTemporaryRedirect)
+}