Refactor the locking mechanism

web/admin.go

@@ -32,9 +32,6 @@ func initAdmin(r *mux.Router) {
 // handlerAdmin provides the admin panel.
 func handlerAdmin(w http.ResponseWriter, rq *http.Request) {
 	util.PrepareRq(rq)
-	if shown := user.FromRequest(rq).ShowLockMaybe(w, rq); shown {
-		return
-	}
 	if user.CanProceed(rq, "admin") {
 		w.Header().Set("Content-Type", "text/html;charset=utf-8")
 		w.WriteHeader(http.StatusOK)
@@ -48,9 +45,6 @@ func handlerAdmin(w http.ResponseWriter, rq *http.Request) {
 // handlerAdminShutdown kills the wiki.
 func handlerAdminShutdown(w http.ResponseWriter, rq *http.Request) {
 	util.PrepareRq(rq)
-	if shown := user.FromRequest(rq).ShowLockMaybe(w, rq); shown {
-		return
-	}
 	if user.CanProceed(rq, "admin/shutdown") && rq.Method == "POST" {
 		log.Fatal("An admin commanded the wiki to shutdown")
 	}
@@ -59,9 +53,6 @@ func handlerAdminShutdown(w http.ResponseWriter, rq *http.Request) {
 // handlerAdminReindexUsers reinitialises the user system.
 func handlerAdminReindexUsers(w http.ResponseWriter, rq *http.Request) {
 	util.PrepareRq(rq)
-	if shown := user.FromRequest(rq).ShowLockMaybe(w, rq); shown {
-		return
-	}
 	if user.CanProceed(rq, "admin") && rq.Method == "POST" {
 		user.ReadUsersFromFilesystem()
 		redirectTo := rq.Referer()
@@ -74,9 +65,6 @@ func handlerAdminReindexUsers(w http.ResponseWriter, rq *http.Request) {
 
 func handlerAdminUsers(w http.ResponseWriter, rq *http.Request) {
 	util.PrepareRq(rq)
-	if shown := user.FromRequest(rq).ShowLockMaybe(w, rq); shown {
-		return
-	}
 	if user.CanProceed(rq, "admin") {
 		path := strings.TrimPrefix(rq.URL.Path, "/admin/users")
 		parts := strings.Split(path, "/")[1:]
@@ -178,9 +166,6 @@ func handlerAdminUsers(w http.ResponseWriter, rq *http.Request) {
 
 func handlerAdminUserNew(w http.ResponseWriter, rq *http.Request) {
 	util.PrepareRq(rq)
-	if shown := user.FromRequest(rq).ShowLockMaybe(w, rq); shown {
-		return
-	}
 	if user.CanProceed(rq, "admin") {
 		if rq.Method == http.MethodGet {
 			// New user form

web/auth.go

@@ -40,9 +40,6 @@ func handlerLock(w http.ResponseWriter, rq *http.Request) {
 
 // handlerRegister both displays the register form (GET) and registers users (POST).
 func handlerRegister(w http.ResponseWriter, rq *http.Request) {
-	if shown := user.FromRequest(rq).ShowLockMaybe(w, rq); shown {
-		return
-	}
 	util.PrepareRq(rq)
 	if !cfg.AllowRegistration {
 		w.WriteHeader(http.StatusForbidden)
@@ -112,9 +109,6 @@ func handlerLogoutConfirm(w http.ResponseWriter, rq *http.Request) {
 
 // handlerLogin shows the login form.
 func handlerLogin(w http.ResponseWriter, rq *http.Request) {
-	if shown := user.FromRequest(rq).ShowLockMaybe(w, rq); shown {
-		return
-	}
 	util.PrepareRq(rq)
 	w.Header().Set("Content-Type", "text/html;charset=utf-8")
 	if cfg.UseAuth {

web/history.go

@@ -27,9 +27,6 @@ func initHistory(r *mux.Router) {
 // handlerHistory lists all revisions of a hypha.
 func handlerHistory(w http.ResponseWriter, rq *http.Request) {
 	util.PrepareRq(rq)
-	if shown := user.FromRequest(rq).ShowLockMaybe(w, rq); shown {
-		return
-	}
 	hyphaName := util.HyphaNameFromRq(rq, "history")
 	var list string
 
@@ -47,9 +44,6 @@ func handlerHistory(w http.ResponseWriter, rq *http.Request) {
 // handlerRecentChanges displays the /recent-changes/ page.
 func handlerRecentChanges(w http.ResponseWriter, rq *http.Request) {
 	util.PrepareRq(rq)
-	if shown := user.FromRequest(rq).ShowLockMaybe(w, rq); shown {
-		return
-	}
 	var (
 		noPrefix = strings.TrimPrefix(rq.URL.String(), "/recent-changes/")
 		n, err   = strconv.Atoi(noPrefix)
@@ -64,9 +58,6 @@ func handlerRecentChanges(w http.ResponseWriter, rq *http.Request) {
 // genericHandlerOfFeeds is a helper function for the web feed handlers.
 func genericHandlerOfFeeds(w http.ResponseWriter, rq *http.Request, f func() (string, error), name string) {
 	util.PrepareRq(rq)
-	if shown := user.FromRequest(rq).ShowLockMaybe(w, rq); shown {
-		return
-	}
 	if content, err := f(); err != nil {
 		w.Header().Set("Content-Type", "text/plain;charset=utf-8")
 		w.WriteHeader(http.StatusInternalServerError)

web/mutators.go

@@ -44,9 +44,6 @@ func factoryHandlerAsker(
 			h         = hyphae.ByName(hyphaName)
 			u         = user.FromRequest(rq)
 		)
-		if shown := u.ShowLockMaybe(w, rq); shown {
-			return
-		}
 		if err, errtitle := asker(u, h); err != nil {
 			httpErr(
 				w,
@@ -97,9 +94,6 @@ func factoryHandlerConfirmer(
 			h         = hyphae.ByName(hyphaName)
 			u         = user.FromRequest(rq)
 		)
-		if shown := u.ShowLockMaybe(w, rq); shown {
-			return
-		}
 		if hop, errtitle := confirmer(h, u, rq); hop.HasErrors() {
 			httpErr(w, http.StatusInternalServerError, hyphaName,
 				errtitle,
@@ -147,9 +141,6 @@ func handlerEdit(w http.ResponseWriter, rq *http.Request) {
 		err          error
 		u            = user.FromRequest(rq)
 	)
-	if shown := u.ShowLockMaybe(w, rq); shown {
-		return
-	}
 	if err, errtitle := shroom.CanEdit(u, h); err != nil {
 		httpErr(w, http.StatusInternalServerError, hyphaName,
 			errtitle,
@@ -189,9 +180,6 @@ func handlerUploadText(w http.ResponseWriter, rq *http.Request) {
 		hop       *history.HistoryOp
 		errtitle  string
 	)
-	if shown := u.ShowLockMaybe(w, rq); shown {
-		return
-	}
 
 	if action != "Preview" {
 		hop, errtitle = shroom.UploadText(h, []byte(textData), message, u)
@@ -233,9 +221,6 @@ func handlerUploadBinary(w http.ResponseWriter, rq *http.Request) {
 		u                  = user.FromRequest(rq)
 		file, handler, err = rq.FormFile("binary")
 	)
-	if shown := u.ShowLockMaybe(w, rq); shown {
-		return
-	}
 	if err != nil {
 		httpErr(w, http.StatusInternalServerError, hyphaName,
 			"Error",

web/readers.go

@@ -39,9 +39,6 @@ func handlerAttachment(w http.ResponseWriter, rq *http.Request) {
 		h         = hyphae.ByName(hyphaName)
 		u         = user.FromRequest(rq)
 	)
-	if shown := u.ShowLockMaybe(w, rq); shown {
-		return
-	}
 	util.HTTP200Page(w,
 		views.BaseHTML(
 			fmt.Sprintf("Attachment of %s", util.BeautifulName(hyphaName)),
@@ -59,9 +56,6 @@ func handlerPrimitiveDiff(w http.ResponseWriter, rq *http.Request) {
 		h               = hyphae.ByName(hyphaName)
 		u               = user.FromRequest(rq)
 	)
-	if shown := u.ShowLockMaybe(w, rq); shown {
-		return
-	}
 	util.HTTP200Page(w,
 		views.BaseHTML(
 			fmt.Sprintf("Diff of %s at %s", hyphaName, revHash),
@@ -82,9 +76,6 @@ func handlerRevision(w http.ResponseWriter, rq *http.Request) {
 		textContents, err = history.FileAtRevision(h.TextPath, revHash)
 		u                 = user.FromRequest(rq)
 	)
-	if shown := u.ShowLockMaybe(w, rq); shown {
-		return
-	}
 	if err == nil {
 		ctx, _ := mycocontext.ContextFromStringInput(hyphaName, textContents)
 		contents = mycomarkup.BlocksToHTML(ctx, mycomarkup.BlockTree(ctx))
@@ -103,9 +94,6 @@ func handlerRevision(w http.ResponseWriter, rq *http.Request) {
 // handlerText serves raw source text of the hypha.
 func handlerText(w http.ResponseWriter, rq *http.Request) {
 	util.PrepareRq(rq)
-	if shown := user.FromRequest(rq).ShowLockMaybe(w, rq); shown {
-		return
-	}
 	hyphaName := util.HyphaNameFromRq(rq, "text")
 	if h := hyphae.ByName(hyphaName); h.Exists {
 		log.Println("Serving", h.TextPath)
@@ -117,9 +105,6 @@ func handlerText(w http.ResponseWriter, rq *http.Request) {
 // handlerBinary serves binary part of the hypha.
 func handlerBinary(w http.ResponseWriter, rq *http.Request) {
 	util.PrepareRq(rq)
-	if shown := user.FromRequest(rq).ShowLockMaybe(w, rq); shown {
-		return
-	}
 	hyphaName := util.HyphaNameFromRq(rq, "binary")
 	if h := hyphae.ByName(hyphaName); h.Exists {
 		log.Println("Serving", h.BinaryPath)
@@ -138,9 +123,6 @@ func handlerHypha(w http.ResponseWriter, rq *http.Request) {
 		openGraph string
 		u         = user.FromRequest(rq)
 	)
-	if shown := u.ShowLockMaybe(w, rq); shown {
-		return
-	}
 	if h.Exists {
 		fileContentsT, errT := os.ReadFile(h.TextPath)
 		_, errB := os.Stat(h.BinaryPath)

web/search.go

@@ -24,9 +24,6 @@ func handlerTitleSearch(w http.ResponseWriter, rq *http.Request) {
 		query = rq.FormValue("q")
 		u     = user.FromRequest(rq)
 	)
-	if shown := u.ShowLockMaybe(w, rq); shown {
-		return
-	}
 	w.WriteHeader(http.StatusOK)
 	_, _ = io.WriteString(
 		w,
@@ -41,13 +38,7 @@ func handlerTitleSearch(w http.ResponseWriter, rq *http.Request) {
 func handlerTitleSearchJSON(w http.ResponseWriter, rq *http.Request) {
 	util.PrepareRq(rq)
 	_ = rq.ParseForm()
-	var (
+	query := rq.FormValue("q")
-		query = rq.FormValue("q")
-		u     = user.FromRequest(rq)
-	)
-	if shown := u.ShowLockMaybe(w, rq); shown {
-		return
-	}
 	w.WriteHeader(http.StatusOK)
 	_, _ = io.WriteString(
 		w,

web/stuff.go

@@ -37,10 +37,6 @@ func initStuff(r *mux.Router) {
 
 // handlerHelp gets the appropriate documentation or tells you where you (personally) have failed.
 func handlerHelp(w http.ResponseWriter, rq *http.Request) {
-	if shown := user.FromRequest(rq).ShowLockMaybe(w, rq); shown {
-		return
-	}
-
 	content, err := help.Get(rq.URL.Path[6:]) // Drop /help/
 	if err != nil && strings.HasPrefix(err.Error(), "open") {
 		w.WriteHeader(http.StatusNotFound)
@@ -80,9 +76,6 @@ func handlerHelp(w http.ResponseWriter, rq *http.Request) {
 // handlerList shows a list of all hyphae in the wiki in random order.
 func handlerList(w http.ResponseWriter, rq *http.Request) {
 	u := user.FromRequest(rq)
-	if shown := u.ShowLockMaybe(w, rq); shown {
-		return
-	}
 	util.PrepareRq(rq)
 	util.HTTP200Page(w, views.BaseHTML("List of pages", views.HyphaListHTML(), u))
 }
@@ -90,9 +83,6 @@ func handlerList(w http.ResponseWriter, rq *http.Request) {
 // handlerReindex reindexes all hyphae by checking the wiki storage directory anew.
 func handlerReindex(w http.ResponseWriter, rq *http.Request) {
 	util.PrepareRq(rq)
-	if shown := user.FromRequest(rq).ShowLockMaybe(w, rq); shown {
-		return
-	}
 	if ok := user.CanProceed(rq, "reindex"); !ok {
 		httpErr(w, http.StatusForbidden, cfg.HomeHypha, "Not enough rights", "You must be an admin to reindex hyphae.")
 		log.Println("Rejected", rq.URL)
@@ -110,9 +100,6 @@ func handlerReindex(w http.ResponseWriter, rq *http.Request) {
 // See https://mycorrhiza.wiki/hypha/configuration/header
 func handlerUpdateHeaderLinks(w http.ResponseWriter, rq *http.Request) {
 	util.PrepareRq(rq)
-	if shown := user.FromRequest(rq).ShowLockMaybe(w, rq); shown {
-		return
-	}
 	if ok := user.CanProceed(rq, "update-header-links"); !ok {
 		httpErr(w, http.StatusForbidden, cfg.HomeHypha, "Not enough rights", "You must be a moderator to update header links.")
 		log.Println("Rejected", rq.URL)
@@ -125,9 +112,6 @@ func handlerUpdateHeaderLinks(w http.ResponseWriter, rq *http.Request) {
 // handlerRandom redirects to a random hypha.
 func handlerRandom(w http.ResponseWriter, rq *http.Request) {
 	util.PrepareRq(rq)
-	if shown := user.FromRequest(rq).ShowLockMaybe(w, rq); shown {
-		return
-	}
 	var (
 		randomHyphaName string
 		amountOfHyphae  = hyphae.Count()
@@ -149,9 +133,6 @@ func handlerRandom(w http.ResponseWriter, rq *http.Request) {
 
 // handlerAbout shows a summary of wiki's software.
 func handlerAbout(w http.ResponseWriter, rq *http.Request) {
-	if shown := user.FromRequest(rq).ShowLockMaybe(w, rq); shown {
-		return
-	}
 	w.Header().Set("Content-Type", "text/html;charset=utf-8")
 	w.WriteHeader(http.StatusOK)
 	_, err := io.WriteString(w, views.BaseHTML("About "+cfg.WikiName, views.AboutHTML(), user.FromRequest(rq)))

web/web.go

@@ -56,9 +56,6 @@ func handlerStyle(w http.ResponseWriter, rq *http.Request) {
 }
 
 func handlerUserList(w http.ResponseWriter, rq *http.Request) {
-	if shown := user.FromRequest(rq).ShowLockMaybe(w, rq); shown {
-		return
-	}
 	w.Header().Set("Content-Type", mime.TypeByExtension(".html"))
 	w.WriteHeader(http.StatusOK)
 	w.Write([]byte(views.BaseHTML("User list", views.UserListHTML(), user.FromRequest(rq))))
@@ -76,8 +73,8 @@ func handlerRobotsTxt(w http.ResponseWriter, rq *http.Request) {
 }
 
 func Handler() http.Handler {
-	r := mux.NewRouter()
+	router := mux.NewRouter()
-	r.Use(func(next http.Handler) http.Handler {
+	router.Use(func(next http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 			// Do stuff here
 			log.Println(r.RequestURI)
@@ -86,32 +83,41 @@ func Handler() http.Handler {
 		})
 	})
 
-	// Available all the time
+	// Public routes
-	initAuth(r)
+	initAuth(router)
+	router.HandleFunc("/robots.txt", handlerRobotsTxt)
+	router.HandleFunc("/static/style.css", handlerStyle)
+	router.PathPrefix("/static/").
+		Handler(http.StripPrefix("/static/", http.FileServer(http.FS(static.FS))))
 
-	initReaders(r)
+	// Wiki routes. They may be locked or restricted
-	initMutators(r)
+	wikiRouter := router.PathPrefix("").Subrouter()
-
+	wikiRouter.Use(func(next http.Handler) http.Handler {
-	initAdmin(r)
+		return http.HandlerFunc(func(w http.ResponseWriter, rq *http.Request) {
-	initHistory(r)
+			user := user.FromRequest(rq)
-	initStuff(r)
+			if !user.ShowLockMaybe(w, rq) {
-	initSearch(r)
+				next.ServeHTTP(w, rq)
-
+			}
-	// Miscellaneous
+		})
-	r.HandleFunc("/user-list", handlerUserList)
-	r.HandleFunc("/robots.txt", handlerRobotsTxt)
-
-	// Static assets
-	r.HandleFunc("/static/style.css", handlerStyle)
-	r.PathPrefix("/static/").Handler(http.StripPrefix("/static/", http.FileServer(http.FS(static.FS))))
-
-	// Index page
-	r.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
-		// Let's pray it never fails
-		addr, _ := url.Parse("/hypha/" + cfg.HomeHypha)
-		r.URL = addr
-		handlerHypha(w, r)
 	})
 
-	return r
+	initReaders(wikiRouter)
+	initMutators(wikiRouter)
+	initAdmin(wikiRouter)
+	initHistory(wikiRouter)
+	initStuff(wikiRouter)
+	initSearch(wikiRouter)
+
+	// Miscellaneous
+	wikiRouter.HandleFunc("/user-list", handlerUserList)
+
+	// Index page
+	wikiRouter.HandleFunc("/", func(w http.ResponseWriter, rq *http.Request) {
+		// Let's pray it never fails
+		addr, _ := url.Parse("/hypha/" + cfg.HomeHypha)
+		rq.URL = addr
+		handlerHypha(w, rq)
+	})
+
+	return router
 }