1 files changed, 13 insertions, 1 deletions
diff --git a/modern/src/store/session.js b/modern/src/store/session.js
index 74dc29a0..121b47f5 100644
--- a/modern/src/store/session.js
+++ b/modern/src/store/session.js
@@ -7,6 +7,7 @@ const { reducer, actions } = createSlice({
     user: null,
     socket: null,
     positions: {},
+    history: {},
   },
   reducers: {
     updateServer(state, action) {
@@ -19,7 +20,18 @@ const { reducer, actions } = createSlice({
       state.socket = action.payload;
     },
     updatePositions(state, action) {
-      action.payload.forEach((position) => state.positions[position.deviceId] = position);
+      const liveRoutes = state.user.attributes.mapLiveRoutes || state.server.attributes.mapLiveRoutes || 'none';
+      const liveRoutesLimit = state.user.attributes['web.liveRouteLength'] || state.user.attributes['web.liveRouteLength'] || 10;
+      action.payload.forEach((position) => {
+        state.positions[position.deviceId] = position;
+        if (liveRoutes !== 'none') {
+          const route = state.history[position.deviceId] || [];
+          const last = route.at(-1);
+          if (!last || (last[0] !== position.longitude && last[1] !== position.latitude)) {
+            state.history[position.deviceId] = [...route.slice(1 - liveRoutesLimit), [position.longitude, position.latitude]];
+          }
+        }
+      });
     },
   },
 });