consolidation & handling of data from backend pt 2

src-tauri/src/state/mod.rs

@@ -1,5 +1,6 @@
 // in app-core/src/state.rs
 use crate::{
+    lock_r,
     lock_w,
     models::{app_data::UserData, dolls::DollDto},
     services::{
@@ -7,7 +8,7 @@ use crate::{
         presence_modules::models::ModuleMetadata,
     },
 };
-use std::collections::HashMap;
+use std::collections::{HashMap, HashSet};
 use std::sync::{Arc, LazyLock, RwLock};
 use tauri::tray::TrayIcon;
 use tracing::info;
@@ -55,6 +56,22 @@ pub struct AppState {
 pub static FDOLL: LazyLock<Arc<RwLock<AppState>>> =
     LazyLock::new(|| Arc::new(RwLock::new(AppState::default())));
 
+pub fn get_known_friend_ids() -> HashSet<String> {
+    let guard = lock_r!(FDOLL);
+
+    guard
+        .user_data
+        .friends
+        .as_ref()
+        .map(|friends| {
+            friends
+                .iter()
+                .filter_map(|friendship| friendship.friend.as_ref().map(|friend| friend.id.clone()))
+                .collect()
+        })
+        .unwrap_or_default()
+}
+
 /// Populate app state with initial
 /// values and necesary client instances.
 pub fn init_app_state() {