Login page internationalisation (#5765)

* Load locale strings in login page
* Generate and use login locale strings
* Add makefile target
* Update workflow
* Update build dockerfiles
* Add missing default string

.gitignore

@@ -21,6 +21,9 @@ vendor
 # GraphQL generated output
 internal/api/generated_*.go
 
+# Generated locale files
+ui/login/locales/*
+
 ####
 # Visual Studio
 ####

Makefile

@@ -281,6 +281,10 @@ generate-ui:
 generate-backend: touch-ui
 	go generate ./cmd/stash
 
+.PHONY: generate-login-locale
+generate-login-locale:
+	go generate ./ui
+
 .PHONY: generate-dataloaders
 generate-dataloaders:
 	go generate ./internal/api/loaders
@@ -351,7 +355,10 @@ ifdef STASH_SOURCEMAPS
 endif
 
 .PHONY: ui
-ui: ui-env
+ui: ui-only generate-login-locale
+
+.PHONY: ui-only
+ui-only: ui-env
 	cd ui/v2.5 && yarn build
 
 .PHONY: zip-ui

docker/build/x86_64/Dockerfile

@@ -1,7 +1,7 @@
 # This dockerfile should be built with `make docker-build` from the stash root.
 
 # Build Frontend
-FROM node:alpine as frontend
+FROM node:20-alpine AS frontend
 RUN apk add --no-cache make git
 ## cache node_modules separately
 COPY ./ui/v2.5/package.json ./ui/v2.5/yarn.lock /stash/ui/v2.5/
@@ -13,19 +13,22 @@ RUN make pre-ui
 RUN make generate-ui
 ARG GITHASH
 ARG STASH_VERSION
-RUN BUILD_DATE=$(date +"%Y-%m-%d %H:%M:%S") make ui
+RUN BUILD_DATE=$(date +"%Y-%m-%d %H:%M:%S") make ui-only
 
 # Build Backend
-FROM golang:1.22-alpine as backend
+FROM golang:1.22.8-alpine AS backend
 RUN apk add --no-cache make alpine-sdk
 WORKDIR /stash
 COPY ./go* ./*.go Makefile gqlgen.yml .gqlgenc.yml /stash/
+COPY ./graphql /stash/graphql/
 COPY ./scripts /stash/scripts/
 COPY ./pkg /stash/pkg/
-COPY ./cmd /stash/cmd
-COPY ./internal /stash/internal
+COPY ./cmd /stash/cmd/
+COPY ./internal /stash/internal/
+# needed for generate-login-locale
+COPY ./ui /stash/ui/
+RUN make generate-backend generate-login-locale
 COPY --from=frontend /stash /stash/
-RUN make generate-backend
 ARG GITHASH
 ARG STASH_VERSION
 RUN make flags-release flags-pie stash

docker/build/x86_64/Dockerfile-CUDA

@@ -1,7 +1,7 @@
 # This dockerfile should be built with `make docker-cuda-build` from the stash root.
 
 # Build Frontend
-FROM node:alpine as frontend
+FROM node:20-alpine AS frontend
 RUN apk add --no-cache make git
 ## cache node_modules separately
 COPY ./ui/v2.5/package.json ./ui/v2.5/yarn.lock /stash/ui/v2.5/
@@ -13,19 +13,22 @@ RUN make pre-ui
 RUN make generate-ui
 ARG GITHASH
 ARG STASH_VERSION
-RUN BUILD_DATE=$(date +"%Y-%m-%d %H:%M:%S") make ui
+RUN BUILD_DATE=$(date +"%Y-%m-%d %H:%M:%S") make ui-only
 
 # Build Backend
-FROM golang:1.22-bullseye as backend
+FROM golang:1.22.8-bullseye AS backend
 RUN apt update && apt install -y build-essential golang
 WORKDIR /stash
 COPY ./go* ./*.go Makefile gqlgen.yml .gqlgenc.yml /stash/
+COPY ./graphql /stash/graphql/
 COPY ./scripts /stash/scripts/
 COPY ./pkg /stash/pkg/
 COPY ./cmd /stash/cmd
 COPY ./internal /stash/internal
+# needed for generate-login-locale
+COPY ./ui /stash/ui/
+RUN make generate-backend generate-login-locale
 COPY --from=frontend /stash /stash/
-RUN make generate-backend
 ARG GITHASH
 ARG STASH_VERSION
 RUN make flags-release flags-pie stash

docker/build/x86_64/README.md

@@ -4,7 +4,7 @@ This dockerfile is used to build a stash docker container using the current sour
 
 # Building the docker container
 
-From the top-level directory (should contain `main.go` file):
+From the top-level directory (should contain `tools.go` file):
 
 ```
 make docker-build

internal/api/server.go

@@ -41,10 +41,11 @@ import (
 )
 
 const (
-	loginEndpoint      = "/login"
-	logoutEndpoint     = "/logout"
-	gqlEndpoint        = "/graphql"
-	playgroundEndpoint = "/playground"
+	loginEndpoint       = "/login"
+	loginLocaleEndpoint = loginEndpoint + "/locale"
+	logoutEndpoint      = "/logout"
+	gqlEndpoint         = "/graphql"
+	playgroundEndpoint  = "/playground"
 )
 
 type Server struct {
@@ -228,6 +229,7 @@ func Initialize() (*Server, error) {
 	r.Get(loginEndpoint, handleLogin())
 	r.Post(loginEndpoint, handleLoginPost())
 	r.Get(logoutEndpoint, handleLogout())
+	r.Get(loginLocaleEndpoint, handleLoginLocale(cfg))
 	r.HandleFunc(loginEndpoint+"/*", func(w http.ResponseWriter, r *http.Request) {
 		r.URL.Path = strings.TrimPrefix(r.URL.Path, loginEndpoint)
 		w.Header().Set("Cache-Control", "no-cache")

internal/api/session.go

@@ -17,7 +17,11 @@ import (
 	"github.com/stashapp/stash/ui"
 )
 
-const returnURLParam = "returnURL"
+const (
+	returnURLParam = "returnURL"
+
+	defaultLocale = "en-GB"
+)
 
 func getLoginPage() []byte {
 	data, err := fs.ReadFile(ui.LoginUIBox, "login.html")
@@ -58,6 +62,47 @@ func serveLoginPage(w http.ResponseWriter, r *http.Request, returnURL string, lo
 	utils.ServeStaticContent(w, r, buffer.Bytes())
 }
 
+func handleLoginLocale(cfg *config.Config) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		// get the locale from the config
+		lang := cfg.GetLanguage()
+		if lang == "" {
+			lang = defaultLocale
+		}
+
+		data, err := getLoginLocale(lang)
+		if err != nil {
+			logger.Debugf("Failed to load login locale file for language %s: %v", lang, err)
+			// try again with the default language
+			if lang != defaultLocale {
+				data, err = getLoginLocale(defaultLocale)
+				if err != nil {
+					logger.Errorf("Failed to load login locale file for default language %s: %v", defaultLocale, err)
+				}
+			}
+
+			// if there's still an error, response with an internal server error
+			if err != nil {
+				http.Error(w, "Failed to load login locale file", http.StatusInternalServerError)
+				return
+			}
+		}
+
+		// write a script to set the locale string map as a global variable
+		localeScript := fmt.Sprintf("var localeStrings = %s;", data)
+		w.Header().Set("Content-Type", "application/javascript")
+		_, _ = w.Write([]byte(localeScript))
+	}
+}
+
+func getLoginLocale(lang string) ([]byte, error) {
+	data, err := fs.ReadFile(ui.LoginUIBox, "locales/"+lang+".json")
+	if err != nil {
+		return nil, err
+	}
+	return data, nil
+}
+
 func handleLogin() http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		returnURL := r.URL.Query().Get(returnURLParam)

scripts/generateLoginLocales.go

@@ -0,0 +1,90 @@
+//go:build ignore
+// +build ignore
+
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"io/fs"
+	"os"
+	"path/filepath"
+
+	"github.com/stashapp/stash/pkg/fsutil"
+	"github.com/stashapp/stash/pkg/utils"
+)
+
+func main() {
+	verbose := len(os.Args) > 1 && os.Args[1] == "-v"
+
+	fmt.Printf("Generating login locales\n")
+
+	// read all json files in the locales directory
+	// and extract only the login part
+
+	// assume running from ui directory
+	dirFS := os.DirFS(filepath.Join("v2.5", "src", "locales"))
+
+	// ensure the login/locales directory exists
+	if err := fsutil.EnsureDir(filepath.Join("login", "locales")); err != nil {
+		panic(err)
+	}
+
+	fs.WalkDir(dirFS, ".", func(path string, d fs.DirEntry, err error) error {
+		if err != nil {
+			panic(err)
+		}
+
+		if d.IsDir() {
+			return nil
+		}
+
+		if filepath.Ext(path) != ".json" {
+			return nil
+		}
+
+		// extract the login part
+		// from the json file
+		src, err := dirFS.Open(path)
+		if err != nil {
+			panic(err)
+		}
+
+		defer src.Close()
+		data, err := io.ReadAll(src)
+		if err != nil {
+			panic(err)
+		}
+
+		m := make(utils.NestedMap)
+		if err := json.Unmarshal(data, &m); err != nil {
+			panic(err)
+		}
+
+		l, found := m.Get("login")
+		if !found {
+			// nothing to do
+			return nil
+		}
+
+		// create new json file
+		// with only the login part
+		if verbose {
+			fmt.Printf("Writing %s\n", d.Name())
+		}
+
+		f, err := os.Create(filepath.Join("login", "locales", d.Name()))
+		if err != nil {
+			panic(err)
+		}
+
+		defer f.Close()
+		e := json.NewEncoder(f)
+		if err := e.Encode(l); err != nil {
+			panic(err)
+		}
+
+		return nil
+	})
+}

ui/login/login.html

@@ -9,6 +9,18 @@
     <link rel="shortcut icon" href="data:,">
     <link rel="stylesheet" href="login/login.css">
     <link rel="stylesheet" href="css">
+
+    <!-- load locale -->
+    <script>
+        var localeStrings = {
+            username: "Username",
+            password: "Password",
+            login: "Login",
+            invalid_credentials: "Invalid credentials",
+            internal_error: "Unexpected internal error. See logs for more details"
+        };
+    </script>
+    <script src="login/locale"></script>
 </head>
 
 <script>
@@ -25,28 +37,27 @@
                 if (xhr.status == 200) {
                     window.location.replace(returnURL);
                 } else {
-                    document.getElementsByClassName("login-error")[0].innerHTML = xhr.responseText;
+                    document.getElementsByClassName("login-error")[0].innerHTML = localeStrings.invalid_credentials;
                 }
             }
         };
         xhr.onerror = function() {
-            document.getElementsByClassName("login-error")[0].innerHTML = "An error occurred while trying to login.";
+            document.getElementsByClassName("login-error")[0].innerHTML = localeStrings.internal_error;
         };
         xhr.send("username=" + username + "&password=" + password + "&returnURL=" + returnURL);
     }
 </script>
 
 <body class="login">
-
     <div class="dialog">
         <div class="card">
             <form action="login" method="POST" onsubmit="event.preventDefault(); login();">
                 <div class="form-group">
-                    <label for="username"><h6>Username</h6></label>
+                    <label for="username"><h6 id="username-heading">Username</h6></label>
                     <input class="text-input form-control" id="username" name="username" type="text" placeholder="Username" />
                 </div>
                 <div class="form-group">
-                    <label for="password"><h6>Password</h6></label>
+                    <label for="password"><h6 id="password-heading">Password</h6></label>
                     <input class="text-input form-control" id="password" name="password" type="password" placeholder="Password" />
                 </div>
                 <div class="login-error">
@@ -56,11 +67,19 @@
                 <input type="hidden" id="returnURL" name="returnURL" value="{{.URL}}" />
 
                 <div>
-                    <input class="btn btn-primary" type="submit" value="Login">
+                    <input id="login-button" class="btn btn-primary" type="submit" value="Login">
                 </div>
             </form>
         </div>
     </div>
 
 </body>
+
+<script>
+    document.getElementById("username-heading").innerText = localeStrings.username;
+    document.getElementById("password-heading").innerText = localeStrings.password;
+    document.getElementById("username").placeholder = localeStrings.username;
+    document.getElementById("password").placeholder = localeStrings.password;
+    document.getElementById("login-button").value = localeStrings.login;
+</script>
 </html>

ui/ui.go

@@ -1,3 +1,4 @@
+//go:generate go run -tags=dev ../scripts/generateLoginLocales.go
 package ui
 
 import (

ui/v2.5/src/locales/en-GB.json

@@ -1142,6 +1142,13 @@
     "generic": "Loading…",
     "plugins": "Loading plugins…"
   },
+  "login": {
+    "login": "Login",
+    "username": "Username",
+    "password": "Password",
+    "invalid_credentials": "Invalid username or password",
+    "internal_error": "Unexpected internal error. See logs for more details"
+  },
   "marker_count": "Marker Count",
   "markers": "Markers",
   "measurements": "Measurements",