add login page customization

main/main.go

@@ -16,7 +16,9 @@ func main() {
 	read_config()
 	init_dav_client()
 
-	webserver.ServeLoginPage("/login")
+	webserver.ServeLoginPage("/login", webserver.CustomizableLoginData{
+		ServiceName: "Astral Calendar",
+	})
 	webserver.EnableLogoRoute()
 	webserver.EnableStaticRoute()
 	webserver.ServeWebserver()

webserver/login_page.go

@@ -8,13 +8,20 @@ import (
 
 type LoginPageData struct {
 	IsHiddenClassList string
+	LoginData         CustomizableLoginData
 }
 
+type CustomizableLoginData struct {
+	ServiceName string
+}
+
+var LoginPageDataCustomizations CustomizableLoginData
+
 func loginHandler(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Content-Type", "text/html; charset=utf-8")
 	tmpl := template.Must(template.ParseFiles("webserver/pages/login_page.html"))
 	if r.Method == http.MethodGet {
-		tmpl.Execute(w, LoginPageData{IsHiddenClassList: "hidden"})
+		tmpl.Execute(w, LoginPageData{IsHiddenClassList: "hidden", LoginData: LoginPageDataCustomizations})
 		return
 	}
 

webserver/pages/login_page.html

@@ -13,7 +13,7 @@
 <img id="logo_image" alt="logo" src="/logo" />
 <form id="login_card" class="card" method="POST">
     <div id="welcome_text">
-        Welcome to Astral Tech, Please Sign in to your account below
+        Welcome to {{.LoginData.ServiceName}}, Please Sign in to your account below
     </div>
 
     <div class="error {{.IsHiddenClassList}}">

webserver/webserver.go

@@ -7,7 +7,8 @@ import (
 
 var routes []string
 
-func ServeLoginPage(route string) {
+func ServeLoginPage(route string, data CustomizableLoginData) {
+	LoginPageDataCustomizations = data
 	ServeWebpage(route, loginHandler)
 }