Refactor decryption logic to handle empty fields consistently across services

src-tauri/src/shared/session.rs

@@ -0,0 +1,24 @@
+use std::sync::{Arc, Mutex};
+
+use crate::shared::types::Lang;
+
+pub struct Session {
+    pub user_id: Option<String>,
+    pub lang: Lang,
+}
+
+impl Session {
+    pub fn new() -> Self {
+        Self { user_id: None, lang: Lang::Fr }
+    }
+
+    pub fn get_user_id(&self) -> Result<&str, String> {
+        self.user_id.as_deref().ok_or_else(|| "No user session. Please log in first.".to_string())
+    }
+}
+
+pub type SessionState = Arc<Mutex<Session>>;
+
+pub fn create_session() -> SessionState {
+    Arc::new(Mutex::new(Session::new()))
+}