update

src-tauri/src/settings.rs

@@ -19,6 +19,12 @@ pub struct Settings {
   /// The site's MCP, which runs the Keycloak sign-in.
   #[serde(default)]
   pub mcp_url: String,
+  /// Where ODIAN's AI features live (destination prediction, chat, vision): the MCP that
+  /// serves `/api/ai/...`, reached over the internet. Empty keeps ODIAN wholly offline, which
+  /// is what an install with no line out wants; set, it is the one address the client is
+  /// allowed to reach, and the AI features stop saying "not available offline".
+  #[serde(default)]
+  pub ai_url: String,
   #[serde(default)]
   pub install_dir: String,
   /// Display name from site.json; the UI's settings form does not edit it.
@@ -34,6 +40,8 @@ struct SiteFile {
   site_url: String,
   #[serde(default)]
   mcp_url: String,
+  #[serde(default)]
+  ai_url: String,
   /// This launcher ships on an ODIAN drive: see `portable_root`.
   #[serde(default)]
   portable: bool,
@@ -190,6 +198,15 @@ fn folder_problem_on(folder: &Path, drive: &Path) -> Option<String> {
   }
 }
 
+/// Whether a drive's install folder still needs the grant below: only while nothing has
+/// been installed into it. Handing it out on a folder that already holds an install makes
+/// Windows walk every file under it to push the inheritable entry down - on a drive
+/// carrying a million map tiles that grinds for hours, with the install waiting on it.
+/// Everything written into the folder afterwards inherits the grant on its own.
+pub fn grant_still_needed(install_dir: &Path) -> bool {
+  !install_dir.join("versions").exists()
+}
+
 /// Is this folder on the drive the launcher runs from? Only then does the install travel,
 /// and only then is it worth opening to every account of every PC the drive is plugged into.
 pub fn installs_on_the_drive(folder: &Path) -> bool {
@@ -252,6 +269,7 @@ impl Settings {
         let settings = Settings {
           site_url: normalize_url(&site.site_url),
           mcp_url: normalize_url(&site.mcp_url),
+          ai_url: normalize_url(&site.ai_url),
           install_dir: default_install_dir(),
           site_name: site.name,
         };
@@ -296,6 +314,16 @@ impl Settings {
 mod tests {
   use super::*;
 
+  #[test]
+  fn the_account_grant_is_for_an_empty_folder_only() {
+    let dir = std::env::temp_dir().join(format!("odian-grant-{}", uuid::Uuid::new_v4().simple()));
+    std::fs::create_dir_all(&dir).unwrap();
+    assert!(grant_still_needed(&dir), "nothing installed yet: hand it out");
+    std::fs::create_dir_all(dir.join("versions").join("0.1.0")).unwrap();
+    assert!(!grant_still_needed(&dir), "an install is there: walking it would take hours");
+    std::fs::remove_dir_all(&dir).unwrap();
+  }
+
   #[test]
   fn a_drives_own_launcher_installs_on_that_drive_whatever_its_letter() {
     for (exe, want) in [