Restructure language loading to support incomplete translations

On startup, files are scanned and any missing values are replaced with
the english version.

api.go

@@ -1085,33 +1085,15 @@ func (app *appContext) GetConfig(gc *gin.Context) {
 	app.info.Println("Config requested")
 	resp := app.configBase
 	// Load language options
-	loadLangs := func(langs *map[string]map[string]interface{}, settingsKey string) (string, []string) {
-		langOptions := make([]string, len(*langs))
-		chosenLang := app.config.Section("ui").Key("language" + settingsKey).MustString("en-us")
-		chosenLangName := (*langs)[chosenLang]["meta"].(map[string]interface{})["name"].(string)
-		i := 0
-		for _, lang := range *langs {
-			langOptions[i] = lang["meta"].(map[string]interface{})["name"].(string)
-			i++
-		}
-		return chosenLangName, langOptions
-	}
-	formChosen, formOptions := loadLangs(&app.storage.lang.Form, "-form")
+	formChosen, formOptions := app.storage.lang.Form.getOptions(app.config.Section("ui").Key("language-form").MustString("en-us"))
 	fl := resp.Sections["ui"].Settings["language-form"]
 	fl.Options = formOptions
 	fl.Value = formChosen
-	adminChosen, adminOptions := loadLangs(&app.storage.lang.Admin, "-admin")
+	adminChosen, adminOptions := app.storage.lang.Admin.getOptions(app.config.Section("ui").Key("language-admin").MustString("en-us"))
 	al := resp.Sections["ui"].Settings["language-admin"]
 	al.Options = adminOptions
 	al.Value = adminChosen
-	emailOptions := make([]string, len(app.storage.lang.Email))
-	chosenLang := app.config.Section("email").Key("language").MustString("en-us")
-	emailChosen := app.storage.lang.Email.get(chosenLang, "meta", "name")
-	i := 0
-	for langName := range app.storage.lang.Email {
-		emailOptions[i] = app.storage.lang.Email.get(langName, "meta", "name")
-		i++
-	}
+	emailChosen, emailOptions := app.storage.lang.Email.getOptions(app.config.Section("email").Key("language").MustString("en-us"))
 	el := resp.Sections["email"].Settings["language"]
 	el.Options = emailOptions
 	el.Value = emailChosen
@@ -1136,7 +1118,7 @@ func (app *appContext) GetConfig(gc *gin.Context) {
 
 	t := resp.Sections["jellyfin"].Settings["type"]
 	opts := make([]string, len(serverTypes))
-	i = 0
+	i := 0
 	for _, v := range serverTypes {
 		opts[i] = v
 		i++
@@ -1169,21 +1151,21 @@ func (app *appContext) ModifyConfig(gc *gin.Context) {
 			for setting, value := range settings.(map[string]interface{}) {
 				if section == "ui" && setting == "language-form" {
 					for key, lang := range app.storage.lang.Form {
-						if lang["meta"].(map[string]interface{})["name"].(string) == value.(string) {
+						if lang.Meta.Name == value.(string) {
 							tempConfig.Section("ui").Key("language-form").SetValue(key)
 							break
 						}
 					}
 				} else if section == "ui" && setting == "language-admin" {
 					for key, lang := range app.storage.lang.Admin {
-						if lang["meta"].(map[string]interface{})["name"].(string) == value.(string) {
+						if lang.Meta.Name == value.(string) {
 							tempConfig.Section("ui").Key("language-admin").SetValue(key)
 							break
 						}
 					}
 				} else if section == "email" && setting == "language" {
-					for key := range app.storage.lang.Email {
-						if app.storage.lang.Email.get(key, "meta", "name") == value.(string) {
+					for key, lang := range app.storage.lang.Email {
+						if lang.Meta.Name == value.(string) {
 							tempConfig.Section("email").Key("language").SetValue(key)
 							break
 						}
@@ -1260,11 +1242,11 @@ func (app *appContext) GetLanguages(gc *gin.Context) {
 	resp := langDTO{}
 	if page == "form" {
 		for key, lang := range app.storage.lang.Form {
-			resp[key] = lang["meta"].(map[string]interface{})["name"].(string)
+			resp[key] = lang.Meta.Name
 		}
 	} else if page == "admin" {
 		for key, lang := range app.storage.lang.Admin {
-			resp[key] = lang["meta"].(map[string]interface{})["name"].(string)
+			resp[key] = lang.Meta.Name
 		}
 	}
 	if len(resp) == 0 {
@@ -1274,6 +1256,19 @@ func (app *appContext) GetLanguages(gc *gin.Context) {
 	gc.JSON(200, resp)
 }
 
+func (app *appContext) ServeLang(gc *gin.Context) {
+	page := gc.Param("page")
+	lang := strings.Replace(gc.Param("file"), ".json", "", 1)
+	if page == "admin" {
+		gc.JSON(200, app.storage.lang.Admin[lang])
+		return
+	} else if page == "form" {
+		gc.JSON(200, app.storage.lang.Form[lang])
+		return
+	}
+	respondBool(400, false, gc)
+}
+
 // func Restart() error {
 // 	defer func() {
 // 		if r := recover(); r != nil {

email.go

@@ -73,8 +73,7 @@ func (sm *SMTP) send(address, fromName, fromAddr string, email *Email) error {
 // Emailer contains the email sender, email content, and methods to construct message content.
 type Emailer struct {
 	fromAddr, fromName string
-	lang               *EmailLang
-	cLang              string
+	lang               emailLang
 	sender             emailClient
 }
 
@@ -110,8 +109,7 @@ func NewEmailer(app *appContext) *Emailer {
 	emailer := &Emailer{
 		fromAddr: app.config.Section("email").Key("address").String(),
 		fromName: app.config.Section("email").Key("from").String(),
-		lang:     &(app.storage.lang.Email),
-		cLang:    app.storage.lang.chosenEmailLang,
+		lang:     app.storage.lang.Email[app.storage.lang.chosenEmailLang],
 	}
 	method := app.config.Section("email").Key("method").String()
 	if method == "smtp" {
@@ -137,7 +135,7 @@ func (emailer *Emailer) NewMailgun(url, key string) {
 	sender := &Mailgun{
 		client: mailgun.NewMailgun(strings.Split(emailer.fromAddr, "@")[1], key),
 	}
-	// Mailgun client takes the base url, so we need to trim off the end (e.g 'v3/messages'
+	// Mailgun client takes the base url, so we need to trim off the end (e.g 'v3/messages')
 	if strings.Contains(url, "messages") {
 		url = url[0:strings.LastIndex(url, "/")]
 		url = url[0:strings.LastIndex(url, "/")]
@@ -157,9 +155,8 @@ func (emailer *Emailer) NewSMTP(server string, port int, username, password stri
 }
 
 func (emailer *Emailer) constructInvite(code string, invite Invite, app *appContext) (*Email, error) {
-	lang := emailer.cLang
 	email := &Email{
-		subject: app.config.Section("invite_emails").Key("subject").MustString(emailer.lang.get(lang, "inviteEmail", "title")),
+		subject: app.config.Section("invite_emails").Key("subject").MustString(emailer.lang.InviteEmail.get("title")),
 	}
 	expiry := invite.ValidTill
 	d, t, expiresIn := emailer.formatExpiry(expiry, false, app.datePattern, app.timePattern)
@@ -175,11 +172,11 @@ func (emailer *Emailer) constructInvite(code string, invite Invite, app *appCont
 		}
 		var tplData bytes.Buffer
 		err = tpl.Execute(&tplData, map[string]string{
-			"hello":              emailer.lang.get(lang, "inviteEmail", "hello"),
-			"youHaveBeenInvited": emailer.lang.get(lang, "inviteEmail", "youHaveBeenInvited"),
-			"toJoin":             emailer.lang.get(lang, "inviteEmail", "toJoin"),
-			"inviteExpiry":       emailer.lang.format(lang, "inviteEmail", "inviteExpiry", d, t, expiresIn),
-			"linkButton":         emailer.lang.get(lang, "inviteEmail", "linkButton"),
+			"hello":              emailer.lang.InviteEmail.get("hello"),
+			"youHaveBeenInvited": emailer.lang.InviteEmail.get("youHaveBeenInvited"),
+			"toJoin":             emailer.lang.InviteEmail.get("toJoin"),
+			"inviteExpiry":       emailer.lang.InviteEmail.format("inviteExpiry", d, t, expiresIn),
+			"linkButton":         emailer.lang.InviteEmail.get("linkButton"),
 			"invite_link":        inviteLink,
 			"message":            message,
 		})
@@ -196,9 +193,8 @@ func (emailer *Emailer) constructInvite(code string, invite Invite, app *appCont
 }
 
 func (emailer *Emailer) constructExpiry(code string, invite Invite, app *appContext) (*Email, error) {
-	lang := emailer.cLang
 	email := &Email{
-		subject: emailer.lang.get(lang, "inviteExpiry", "title"),
+		subject: emailer.lang.InviteExpiry.get("title"),
 	}
 	expiry := app.formatDatetime(invite.ValidTill)
 	for _, key := range []string{"html", "text"} {
@@ -209,9 +205,9 @@ func (emailer *Emailer) constructExpiry(code string, invite Invite, app *appCont
 		}
 		var tplData bytes.Buffer
 		err = tpl.Execute(&tplData, map[string]string{
-			"inviteExpired":      emailer.lang.get(lang, "inviteExpiry", "inviteExpired"),
-			"expiredAt":          emailer.lang.format(lang, "inviteExpiry", "expiredAt", "\""+code+"\"", expiry),
-			"notificationNotice": emailer.lang.get(lang, "inviteExpiry", "notificationNotice"),
+			"inviteExpired":      emailer.lang.InviteExpiry.get("inviteExpired"),
+			"expiredAt":          emailer.lang.InviteExpiry.format("expiredAt", "\""+code+"\"", expiry),
+			"notificationNotice": emailer.lang.InviteExpiry.get("notificationNotice"),
 		})
 		if err != nil {
 			return nil, err
@@ -226,9 +222,8 @@ func (emailer *Emailer) constructExpiry(code string, invite Invite, app *appCont
 }
 
 func (emailer *Emailer) constructCreated(code, username, address string, invite Invite, app *appContext) (*Email, error) {
-	lang := emailer.cLang
 	email := &Email{
-		subject: emailer.lang.get(lang, "userCreated", "title"),
+		subject: emailer.lang.UserCreated.get("title"),
 	}
 	created := app.formatDatetime(invite.Created)
 	var tplAddress string
@@ -245,14 +240,14 @@ func (emailer *Emailer) constructCreated(code, username, address string, invite
 		}
 		var tplData bytes.Buffer
 		err = tpl.Execute(&tplData, map[string]string{
-			"aUserWasCreated":    emailer.lang.format(lang, "userCreated", "aUserWasCreated", "\""+code+"\""),
-			"name":               emailer.lang.get(lang, "userCreated", "name"),
-			"address":            emailer.lang.get(lang, "userCreated", "emailAddress"),
-			"time":               emailer.lang.get(lang, "userCreated", "time"),
+			"aUserWasCreated":    emailer.lang.UserCreated.format("aUserWasCreated", "\""+code+"\""),
+			"name":               emailer.lang.UserCreated.get("name"),
+			"address":            emailer.lang.UserCreated.get("emailAddress"),
+			"time":               emailer.lang.UserCreated.get("time"),
 			"nameVal":            username,
 			"addressVal":         tplAddress,
 			"timeVal":            created,
-			"notificationNotice": emailer.lang.get(lang, "userCreated", "notificationNotice"),
+			"notificationNotice": emailer.lang.UserCreated.get("notificationNotice"),
 		})
 		if err != nil {
 			return nil, err
@@ -267,9 +262,8 @@ func (emailer *Emailer) constructCreated(code, username, address string, invite
 }
 
 func (emailer *Emailer) constructReset(pwr PasswordReset, app *appContext) (*Email, error) {
-	lang := emailer.cLang
 	email := &Email{
-		subject: emailer.lang.get(lang, "passwordReset", "title"),
+		subject: emailer.lang.PasswordReset.get("title"),
 	}
 	d, t, expiresIn := emailer.formatExpiry(pwr.Expiry, true, app.datePattern, app.timePattern)
 	message := app.config.Section("email").Key("message").String()
@@ -281,12 +275,12 @@ func (emailer *Emailer) constructReset(pwr PasswordReset, app *appContext) (*Ema
 		}
 		var tplData bytes.Buffer
 		err = tpl.Execute(&tplData, map[string]string{
-			"helloUser":                emailer.lang.format(lang, "passwordReset", "helloUser", pwr.Username),
-			"someoneHasRequestedReset": emailer.lang.get(lang, "passwordReset", "someoneHasRequestedReset"),
-			"ifItWasYou":               emailer.lang.get(lang, "passwordReset", "ifItWasYou"),
-			"codeExpiry":               emailer.lang.format(lang, "passwordReset", "codeExpiry", d, t, expiresIn),
-			"ifItWasNotYou":            emailer.lang.get(lang, "passwordReset", "ifItWasNotYou"),
-			"pin":                      emailer.lang.get(lang, "passwordReset", "pin"),
+			"helloUser":                emailer.lang.PasswordReset.format("helloUser", pwr.Username),
+			"someoneHasRequestedReset": emailer.lang.PasswordReset.get("someoneHasRequestedReset"),
+			"ifItWasYou":               emailer.lang.PasswordReset.get("ifItWasYou"),
+			"codeExpiry":               emailer.lang.PasswordReset.format("codeExpiry", d, t, expiresIn),
+			"ifItWasNotYou":            emailer.lang.PasswordReset.get("ifItWasNotYou"),
+			"pin":                      emailer.lang.PasswordReset.get("pin"),
 			"pinVal":                   pwr.Pin,
 			"message":                  message,
 		})
@@ -303,9 +297,8 @@ func (emailer *Emailer) constructReset(pwr PasswordReset, app *appContext) (*Ema
 }
 
 func (emailer *Emailer) constructDeleted(reason string, app *appContext) (*Email, error) {
-	lang := emailer.cLang
 	email := &Email{
-		subject: emailer.lang.get(lang, "userDeleted", "title"),
+		subject: emailer.lang.UserDeleted.get("title"),
 	}
 	for _, key := range []string{"html", "text"} {
 		fpath := app.config.Section("deletion").Key("email_" + key).String()
@@ -315,8 +308,8 @@ func (emailer *Emailer) constructDeleted(reason string, app *appContext) (*Email
 		}
 		var tplData bytes.Buffer
 		err = tpl.Execute(&tplData, map[string]string{
-			"yourAccountWasDeleted": emailer.lang.get(lang, "userDeleted", "yourAccountWasDeleted"),
-			"reason":                emailer.lang.get(lang, "userDeleted", "reason"),
+			"yourAccountWasDeleted": emailer.lang.UserDeleted.get("yourAccountWasDeleted"),
+			"reason":                emailer.lang.UserDeleted.get("reason"),
 			"reasonVal":             reason,
 		})
 		if err != nil {

html/admin.html

@@ -253,9 +253,9 @@
                 <div class="card ~neutral !low accounts mb-1">
                     <span class="heading">{{ .strings.accounts }}</span>
                     <div class="fr">
-                        <span class="button ~neutral !normal" id="accounts-add-user">{{ .quantityStrings.addUser.singular }}</span>
+                        <span class="button ~neutral !normal" id="accounts-add-user">{{ .quantityStrings.addUser.Singular }}</span>
                         <span class="button ~urge !normal" id="accounts-modify-user">{{ .strings.modifySettings }}</span>
-                        <span class="button ~critical !normal" id="accounts-delete-user">{{ .quantityStrings.deleteUser.singular }}</span>
+                        <span class="button ~critical !normal" id="accounts-delete-user">{{ .quantityStrings.deleteUser.Singular }}</span>
                     </div>
                     <div class="card ~neutral !normal accounts-header table-responsive mt-half">
                         <table class="table">

lang.go

@@ -1,5 +1,7 @@
 package main
 
+import "strings"
+
 type langMeta struct {
 	Name string `json:"name"`
 }
@@ -9,14 +11,80 @@ type quantityString struct {
 	Plural   string `json:"plural"`
 }
 
+type adminLangs map[string]adminLang
+
+func (ls *adminLangs) getOptions(chosen string) (string, []string) {
+	opts := make([]string, len(*ls))
+	chosenLang := (*ls)[chosen].Meta.Name
+	i := 0
+	for _, lang := range *ls {
+		opts[i] = lang.Meta.Name
+	}
+	return chosenLang, opts
+}
+
 type adminLang struct {
 	Meta            langMeta                  `json:"meta"`
-	Strings         map[string]string         `json:"strings"`
-	Notifications   map[string]string         `json:"notifications"`
+	Strings         langSection               `json:"strings"`
+	Notifications   langSection               `json:"notifications"`
 	QuantityStrings map[string]quantityString `json:"quantityStrings"`
+	JSON            string
+}
+
+type formLangs map[string]formLang
+
+func (ls *formLangs) getOptions(chosen string) (string, []string) {
+	opts := make([]string, len(*ls))
+	chosenLang := (*ls)[chosen].Meta.Name
+	i := 0
+	for _, lang := range *ls {
+		opts[i] = lang.Meta.Name
+	}
+	return chosenLang, opts
 }
 
 type formLang struct {
-	Strings           map[string]string         `json:"strings"`
-	ValidationStrings map[string]quantityString `json:"validationStrings"`
+	Meta                  langMeta                  `json:"meta"`
+	Strings               langSection               `json:"strings"`
+	ValidationStrings     map[string]quantityString `json:"validationStrings"`
+	validationStringsJSON string
+}
+
+type emailLangs map[string]emailLang
+
+func (ls *emailLangs) getOptions(chosen string) (string, []string) {
+	opts := make([]string, len(*ls))
+	chosenLang := (*ls)[chosen].Meta.Name
+	i := 0
+	for _, lang := range *ls {
+		opts[i] = lang.Meta.Name
+	}
+	return chosenLang, opts
+}
+
+type emailLang struct {
+	Meta          langMeta    `json:"meta"`
+	UserCreated   langSection `json:"userCreated"`
+	InviteExpiry  langSection `json:"inviteExpiry"`
+	PasswordReset langSection `json:"passwordReset"`
+	UserDeleted   langSection `json:"userDeleted"`
+	InviteEmail   langSection `json:"inviteEmail"`
+}
+
+type langSection map[string]string
+
+func (el *langSection) format(field string, vals ...string) string {
+	text := el.get(field)
+	for _, val := range vals {
+		text = strings.Replace(text, "{n}", val, 1)
+	}
+	return text
+}
+
+func (el *langSection) get(field string) string {
+	t, ok := (*el)[field]
+	if !ok {
+		return ""
+	}
+	return t
 }

main.go

@@ -569,7 +569,6 @@ func start(asDaemon, firstCall bool) {
 
 	router.Use(gin.Recovery())
 	router.Use(static.Serve("/", static.LocalFile(filepath.Join(app.localPath, "web"), false)))
-	router.Use(static.Serve("/lang/", static.LocalFile(filepath.Join(app.localPath, "lang"), false)))
 	app.loadHTML(router)
 	router.NoRoute(app.NoRouteHandler)
 	if debugMode {
@@ -580,7 +579,7 @@ func start(asDaemon, firstCall bool) {
 		router.GET("/", app.AdminPage)
 		router.GET("/accounts", app.AdminPage)
 		router.GET("/settings", app.AdminPage)
-
+		router.GET("/lang/:page/:file", app.ServeLang)
 		router.GET("/lang/:page", app.GetLanguages)
 		router.GET("/token/login", app.getTokenLogin)
 		router.GET("/token/refresh", app.getTokenRefresh)

storage.go

@@ -20,36 +20,6 @@ type Storage struct {
 	lang                                                                                                   Lang
 }
 
-type EmailLang map[string]map[string]map[string]interface{} // Map of lang codes to email name to fields
-
-func (el *EmailLang) format(lang, email, field string, vals ...string) string {
-	text := el.get(lang, email, field)
-	for _, val := range vals {
-		text = strings.Replace(text, "{n}", val, 1)
-	}
-	return text
-}
-func (el *EmailLang) get(lang, email, field string) string {
-	t, ok := (*el)[lang][email][field]
-	if !ok {
-		t = (*el)["en-us"][email][field]
-	}
-	return t.(string)
-}
-
-type Lang struct {
-	chosenFormLang  string
-	chosenAdminLang string
-	chosenEmailLang string
-	AdminPath       string
-	Admin           map[string]map[string]interface{}
-	AdminJSON       map[string]string
-	FormPath        string
-	Form            map[string]map[string]interface{}
-	EmailPath       string
-	Email           EmailLang
-}
-
 // timePattern: %Y-%m-%dT%H:%M:%S.%f
 
 type Profile struct {
@@ -73,6 +43,202 @@ type Invite struct {
 	Profile       string                     `json:"profile"`
 }
 
+type Lang struct {
+	chosenFormLang  string
+	chosenAdminLang string
+	chosenEmailLang string
+	AdminPath       string
+	Admin           adminLangs
+	AdminJSON       map[string]string
+	FormPath        string
+	Form            formLangs
+	EmailPath       string
+	Email           emailLangs
+}
+
+func (st *Storage) loadLang() (err error) {
+	err = st.loadLangAdmin()
+	if err != nil {
+		return
+	}
+	err = st.loadLangForm()
+	if err != nil {
+		return
+	}
+	err = st.loadLangEmail()
+	return
+}
+
+// If a given language has missing values, fill it in with the english value.
+func patchLang(english, other *langSection) {
+	for n, ev := range *english {
+		if v, ok := (*other)[n]; !ok || v == "" {
+			(*other)[n] = ev
+		}
+	}
+}
+
+func patchQuantityStrings(english, other *map[string]quantityString) {
+	for n, ev := range *english {
+		qs, ok := (*other)[n]
+		if !ok {
+			(*other)[n] = ev
+			return
+		} else if qs.Singular == "" {
+			qs.Singular = ev.Singular
+		} else if (*other)[n].Plural == "" {
+			qs.Plural = ev.Plural
+		}
+		(*other)[n] = qs
+	}
+}
+
+func (st *Storage) loadLangAdmin() error {
+	st.lang.Admin = map[string]adminLang{}
+	var english adminLang
+	load := func(fname string) error {
+		index := strings.TrimSuffix(fname, filepath.Ext(fname))
+		lang := adminLang{}
+		f, err := ioutil.ReadFile(filepath.Join(st.lang.AdminPath, fname))
+		if err != nil {
+			return err
+		}
+		if substituteStrings != "" {
+			f = []byte(strings.ReplaceAll(string(f), "Jellyfin", substituteStrings))
+		}
+		err = json.Unmarshal(f, &lang)
+		if err != nil {
+			return err
+		}
+		if fname != "en-us.json" {
+			patchLang(&english.Strings, &lang.Strings)
+			patchLang(&english.Notifications, &lang.Notifications)
+			patchQuantityStrings(&english.QuantityStrings, &lang.QuantityStrings)
+		}
+		stringAdmin, err := json.Marshal(lang)
+		if err != nil {
+			return err
+		}
+		lang.JSON = string(stringAdmin)
+		st.lang.Admin[index] = lang
+		return nil
+	}
+	err := load("en-us.json")
+	if err != nil {
+		return err
+	}
+	english = st.lang.Admin["en-us"]
+	files, err := ioutil.ReadDir(st.lang.AdminPath)
+	if err != nil {
+		return err
+	}
+	for _, f := range files {
+		if f.Name() != "en-us.json" {
+			err = load(f.Name())
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func (st *Storage) loadLangForm() error {
+	st.lang.Form = map[string]formLang{}
+	var english formLang
+	load := func(fname string) error {
+		index := strings.TrimSuffix(fname, filepath.Ext(fname))
+		lang := formLang{}
+		f, err := ioutil.ReadFile(filepath.Join(st.lang.FormPath, fname))
+		if err != nil {
+			return err
+		}
+		if substituteStrings != "" {
+			f = []byte(strings.ReplaceAll(string(f), "Jellyfin", substituteStrings))
+		}
+		err = json.Unmarshal(f, &lang)
+		if err != nil {
+			return err
+		}
+		if fname != "en-us.json" {
+			patchLang(&english.Strings, &lang.Strings)
+			patchQuantityStrings(&english.ValidationStrings, &lang.ValidationStrings)
+		}
+		validationStrings, err := json.Marshal(lang.ValidationStrings)
+		if err != nil {
+			return err
+		}
+		lang.validationStringsJSON = string(validationStrings)
+		st.lang.Form[index] = lang
+		return nil
+	}
+	err := load("en-us.json")
+	if err != nil {
+		return err
+	}
+	english = st.lang.Form["en-us"]
+	files, err := ioutil.ReadDir(st.lang.FormPath)
+	if err != nil {
+		return err
+	}
+	for _, f := range files {
+		if f.Name() != "en-us.json" {
+			err = load(f.Name())
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func (st *Storage) loadLangEmail() error {
+	st.lang.Email = map[string]emailLang{}
+	var english emailLang
+	load := func(fname string) error {
+		index := strings.TrimSuffix(fname, filepath.Ext(fname))
+		lang := emailLang{}
+		f, err := ioutil.ReadFile(filepath.Join(st.lang.EmailPath, fname))
+		if err != nil {
+			return err
+		}
+		if substituteStrings != "" {
+			f = []byte(strings.ReplaceAll(string(f), "Jellyfin", substituteStrings))
+		}
+		err = json.Unmarshal(f, &lang)
+		if err != nil {
+			return err
+		}
+		if fname != "en-us.json" {
+			patchLang(&english.UserCreated, &lang.UserCreated)
+			patchLang(&english.InviteExpiry, &lang.InviteExpiry)
+			patchLang(&english.PasswordReset, &lang.PasswordReset)
+			patchLang(&english.UserDeleted, &lang.UserDeleted)
+			patchLang(&english.InviteEmail, &lang.InviteEmail)
+		}
+		st.lang.Email[index] = lang
+		return nil
+	}
+	err := load("en-us.json")
+	if err != nil {
+		return err
+	}
+	english = st.lang.Email["en-us"]
+	files, err := ioutil.ReadDir(st.lang.EmailPath)
+	if err != nil {
+		return err
+	}
+	for _, f := range files {
+		if f.Name() != "en-us.json" {
+			err = load(f.Name())
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
 type Invites map[string]Invite
 
 func (st *Storage) loadInvites() error {
@@ -83,75 +249,75 @@ func (st *Storage) storeInvites() error {
 	return storeJSON(st.invite_path, st.invites)
 }
 
-func (st *Storage) loadLang() error {
-	loadData := func(path string, stringJson bool) (map[string]string, map[string]map[string]interface{}, error) {
-		files, err := ioutil.ReadDir(path)
-		outString := map[string]string{}
-		out := map[string]map[string]interface{}{}
-		if err != nil {
-			return nil, nil, err
-		}
-		for _, f := range files {
-			index := strings.TrimSuffix(f.Name(), filepath.Ext(f.Name()))
-			var data map[string]interface{}
-			var file []byte
-			var err error
-			file, err = ioutil.ReadFile(filepath.Join(path, f.Name()))
-			if err != nil {
-				file = []byte("{}")
-			}
-			// Replace Jellyfin with something if necessary
-			if substituteStrings != "" {
-				fileString := strings.ReplaceAll(string(file), "Jellyfin", substituteStrings)
-				file = []byte(fileString)
-			}
-			err = json.Unmarshal(file, &data)
-			if err != nil {
-				log.Printf("ERROR: Failed to read \"%s\": %s", path, err)
-				return nil, nil, err
-			}
-			if stringJson {
-				stringJSON, err := json.Marshal(data)
-				if err != nil {
-					return nil, nil, err
-				}
-				outString[index] = string(stringJSON)
-			}
-			out[index] = data
-
-		}
-		return outString, out, nil
-	}
-	_, form, err := loadData(st.lang.FormPath, false)
-	if err != nil {
-		return err
-	}
-	for index, lang := range form {
-		validationStrings := lang["validationStrings"].(map[string]interface{})
-		vS, err := json.Marshal(validationStrings)
-		if err != nil {
-			return err
-		}
-		lang["validationStrings"] = string(vS)
-		form[index] = lang
-	}
-	st.lang.Form = form
-	adminJSON, admin, err := loadData(st.lang.AdminPath, true)
-	st.lang.Admin = admin
-	st.lang.AdminJSON = adminJSON
-
-	_, emails, err := loadData(st.lang.EmailPath, false)
-	fixedEmails := map[string]map[string]map[string]interface{}{}
-	for lang, e := range emails {
-		f := map[string]map[string]interface{}{}
-		for field, vals := range e {
-			f[field] = vals.(map[string]interface{})
-		}
-		fixedEmails[lang] = f
-	}
-	st.lang.Email = fixedEmails
-	return err
-}
+// func (st *Storage) loadLang() error {
+// 	loadData := func(path string, stringJson bool) (map[string]string, map[string]map[string]interface{}, error) {
+// 		files, err := ioutil.ReadDir(path)
+// 		outString := map[string]string{}
+// 		out := map[string]map[string]interface{}{}
+// 		if err != nil {
+// 			return nil, nil, err
+// 		}
+// 		for _, f := range files {
+// 			index := strings.TrimSuffix(f.Name(), filepath.Ext(f.Name()))
+// 			var data map[string]interface{}
+// 			var file []byte
+// 			var err error
+// 			file, err = ioutil.ReadFile(filepath.Join(path, f.Name()))
+// 			if err != nil {
+// 				file = []byte("{}")
+// 			}
+// 			// Replace Jellyfin with something if necessary
+// 			if substituteStrings != "" {
+// 				fileString := strings.ReplaceAll(string(file), "Jellyfin", substituteStrings)
+// 				file = []byte(fileString)
+// 			}
+// 			err = json.Unmarshal(file, &data)
+// 			if err != nil {
+// 				log.Printf("ERROR: Failed to read \"%s\": %s", path, err)
+// 				return nil, nil, err
+// 			}
+// 			if stringJson {
+// 				stringJSON, err := json.Marshal(data)
+// 				if err != nil {
+// 					return nil, nil, err
+// 				}
+// 				outString[index] = string(stringJSON)
+// 			}
+// 			out[index] = data
+//
+// 		}
+// 		return outString, out, nil
+// 	}
+// 	_, form, err := loadData(st.lang.FormPath, false)
+// 	if err != nil {
+// 		return err
+// 	}
+// 	for index, lang := range form {
+// 		validationStrings := lang["validationStrings"].(map[string]interface{})
+// 		vS, err := json.Marshal(validationStrings)
+// 		if err != nil {
+// 			return err
+// 		}
+// 		lang["validationStrings"] = string(vS)
+// 		form[index] = lang
+// 	}
+// 	st.lang.Form = form
+// 	adminJSON, admin, err := loadData(st.lang.AdminPath, true)
+// 	st.lang.Admin = admin
+// 	st.lang.AdminJSON = adminJSON
+//
+// 	_, emails, err := loadData(st.lang.EmailPath, false)
+// 	fixedEmails := map[string]map[string]map[string]interface{}{}
+// 	for lang, e := range emails {
+// 		f := map[string]map[string]interface{}{}
+// 		for field, vals := range e {
+// 			f[field] = vals.(map[string]interface{})
+// 		}
+// 		fixedEmails[lang] = f
+// 	}
+// 	st.lang.Email = fixedEmails
+// 	return err
+// }
 
 func (st *Storage) loadEmails() error {
 	return loadJSON(st.emails_path, &st.emails)

views.go

@@ -45,7 +45,7 @@ func (app *appContext) AdminPage(gc *gin.Context) {
 	lang := gc.Query("lang")
 	if lang == "" {
 		lang = app.storage.lang.chosenAdminLang
-	} else if _, ok := app.storage.lang.Form[lang]; !ok {
+	} else if _, ok := app.storage.lang.Admin[lang]; !ok {
 		lang = app.storage.lang.chosenAdminLang
 	}
 	emailEnabled, _ := app.config.Section("invite_emails").Key("enabled").Bool()
@@ -61,9 +61,9 @@ func (app *appContext) AdminPage(gc *gin.Context) {
 		"commit":          COMMIT,
 		"ombiEnabled":     ombiEnabled,
 		"username":        !app.config.Section("email").Key("no_username").MustBool(false),
-		"strings":         app.storage.lang.Admin[lang]["strings"],
-		"quantityStrings": app.storage.lang.Admin[lang]["quantityStrings"],
-		"language":        app.storage.lang.AdminJSON[lang],
+		"strings":         app.storage.lang.Admin[lang].Strings,
+		"quantityStrings": app.storage.lang.Admin[lang].QuantityStrings,
+		"language":        app.storage.lang.Admin[lang].JSON,
 	})
 }
 
@@ -94,8 +94,8 @@ func (app *appContext) InviteProxy(gc *gin.Context) {
 			"requirements":      app.validator.getCriteria(),
 			"email":             email,
 			"username":          !app.config.Section("email").Key("no_username").MustBool(false),
-			"strings":           app.storage.lang.Form[lang]["strings"],
-			"validationStrings": app.storage.lang.Form[lang]["validationStrings"],
+			"strings":           app.storage.lang.Form[lang].Strings,
+			"validationStrings": app.storage.lang.Form[lang].validationStringsJSON,
 			"code":              code,
 		})
 	} else {