add the ability to register from inside the user-ui

crates/chattyness-user-ui/src/api/auth.rs

@@ -9,7 +9,7 @@ use chattyness_db::{
         AccountStatus, AuthenticatedUser, CurrentUserResponse, GuestLoginRequest,
         GuestLoginResponse, JoinRealmRequest, JoinRealmResponse, LoginRequest, LoginResponse,
         LoginType, PasswordResetRequest, PasswordResetResponse, RealmRole, RealmSummary,
-        SignupRequest, SignupResponse, UserSummary,
+        RegisterGuestRequest, RegisterGuestResponse, SignupRequest, SignupResponse, UserSummary,
     },
     queries::{guests, memberships, realms, users},
 };
@@ -471,3 +471,62 @@ pub async fn reset_password(
         redirect_url,
     }))
 }
+
+/// Register guest handler.
+///
+/// Upgrades a guest user to a full user account with username and password.
+pub async fn register_guest(
+    rls_conn: crate::auth::RlsConn,
+    State(pool): State<PgPool>,
+    session: Session,
+    AuthUser(user): AuthUser,
+    Json(req): Json<RegisterGuestRequest>,
+) -> Result<Json<RegisterGuestResponse>, AppError> {
+    // Validate the request
+    req.validate()?;
+
+    // Verify user is a guest
+    if !user.is_guest() {
+        return Err(AppError::Forbidden(
+            "Only guests can register for an account".to_string(),
+        ));
+    }
+
+    // Check username availability
+    if users::username_exists(&pool, &req.username).await? {
+        return Err(AppError::Conflict("Username already taken".to_string()));
+    }
+
+    // Check email availability if provided
+    if let Some(ref email) = req.email {
+        let email_trimmed = email.trim();
+        if !email_trimmed.is_empty() && users::email_exists(&pool, email_trimmed).await? {
+            return Err(AppError::Conflict("Email already registered".to_string()));
+        }
+    }
+
+    // Get email as Option<&str>
+    let email_opt = req.email.as_ref().and_then(|e| {
+        let trimmed = e.trim();
+        if trimmed.is_empty() {
+            None
+        } else {
+            Some(trimmed)
+        }
+    });
+
+    // Upgrade the guest to a full user using RLS connection
+    let mut conn = rls_conn.acquire().await;
+    users::upgrade_guest_to_user_conn(&mut *conn, user.id, &req.username, &req.password, email_opt).await?;
+
+    // Update session login type from 'guest' to 'realm'
+    session
+        .insert(SESSION_LOGIN_TYPE_KEY, "realm")
+        .await
+        .map_err(|e| AppError::Internal(format!("Session error: {}", e)))?;
+
+    Ok(Json(RegisterGuestResponse {
+        success: true,
+        username: req.username,
+    }))
+}