feat: add shadcn admin workspace

backend/src/controllers/admin.rs

@@ -19,6 +19,8 @@ use crate::services::{ai, content};
 
 static ADMIN_LOGGED_IN: AtomicBool = AtomicBool::new(false);
 const FRONTEND_BASE_URL: &str = "http://localhost:4321";
+const DEFAULT_ADMIN_USERNAME: &str = "admin";
+const DEFAULT_ADMIN_PASSWORD: &str = "admin123";
 
 #[derive(Deserialize)]
 pub struct LoginForm {
@@ -397,15 +399,35 @@ fn render_admin(
     format::view(&view_engine.0, template, Value::Object(context))
 }
 
+pub(crate) fn admin_username() -> String {
+    std::env::var("TERMI_ADMIN_USERNAME").unwrap_or_else(|_| DEFAULT_ADMIN_USERNAME.to_string())
+}
+
+pub(crate) fn admin_password() -> String {
+    std::env::var("TERMI_ADMIN_PASSWORD").unwrap_or_else(|_| DEFAULT_ADMIN_PASSWORD.to_string())
+}
+
+pub(crate) fn is_admin_logged_in() -> bool {
+    ADMIN_LOGGED_IN.load(Ordering::SeqCst)
+}
+
+pub(crate) fn set_admin_logged_in(value: bool) {
+    ADMIN_LOGGED_IN.store(value, Ordering::SeqCst);
+}
+
+pub(crate) fn validate_admin_credentials(username: &str, password: &str) -> bool {
+    username == admin_username() && password == admin_password()
+}
+
 pub(crate) fn check_auth() -> Result<()> {
-    if !ADMIN_LOGGED_IN.load(Ordering::SeqCst) {
+    if !is_admin_logged_in() {
         return Err(Error::Unauthorized("Not logged in".to_string()));
     }
     Ok(())
 }
 
 pub async fn root() -> Result<impl IntoResponse> {
-    if ADMIN_LOGGED_IN.load(Ordering::SeqCst) {
+    if is_admin_logged_in() {
         Ok(format::redirect("/admin"))
     } else {
         Ok(format::redirect("/admin/login"))
@@ -428,15 +450,15 @@ pub async fn login_page(
 }
 
 pub async fn login_submit(Form(form): Form<LoginForm>) -> Result<impl IntoResponse> {
-    if form.username == "admin" && form.password == "admin123" {
-        ADMIN_LOGGED_IN.store(true, Ordering::SeqCst);
+    if validate_admin_credentials(&form.username, &form.password) {
+        set_admin_logged_in(true);
         return Ok(format::redirect("/admin"));
     }
     Ok(format::redirect("/admin/login?error=1"))
 }
 
 pub async fn logout() -> Result<impl IntoResponse> {
-    ADMIN_LOGGED_IN.store(false, Ordering::SeqCst);
+    set_admin_logged_in(false);
     Ok(format::redirect("/admin/login"))
 }