Allow setting markers on a per-user basis

marker.nix

@@ -8,20 +8,40 @@ let
       };
     };
   };
+
+  userType = lib.types.submodule {
+    options = {
+      departure = lib.mkOption {
+        type = markerType;
+        default = {};
+      };
+    };
+  };
 in
 {
   options = {
+    users = lib.mkOption {
+      type = lib.types.attrsOf userType;
+    };
+
     map.markers = lib.mkOption {
       type = lib.types.listOf markerType;
     };
   };
 
   config = {
+    users = {
+      manuel.departure.location = "Switzerland";
+      ganondorf.departure.location = "Argentinia";
+    };
+
     map = {
-      markers = [
-        { location = "Switzerland"; }
-        { location = "New York"; }
-      ];
+      markers = lib.filter
+        (marker: marker.location != null)
+        (
+          lib.concatMap (user: [
+            user.departure
+          ]) (lib.attrValues config.users));
 
       center = lib.mkIf
         (lib.length config.map.markers >= 1)