Reconstruct selected paths

PamhagenSysCtrl/Windows/PlantSchemeWindow.xaml.cs

@@ -69,6 +69,7 @@ namespace PamhagenSysCtrl.Windows {
                 [FastSelectButton_MW2_Tank5] = (Graph.MW2, Graph.MP2, Graph.Tank5),
             };
             App.Plant?.Update += OnUpdate;
+            InitializePaths();
         }
 
         private void OnClosed(object sender, EventArgs evt) {
@@ -94,6 +95,8 @@ namespace PamhagenSysCtrl.Windows {
                 }
                 Menu_Settings_OverridePathClearances.IsChecked = false;
                 Menu_Settings_OverrideDryRunClearances.IsChecked = false;
+
+                InitializePaths();
             }
             OnUpdate(null, null);
         }
@@ -593,5 +596,32 @@ namespace PamhagenSysCtrl.Windows {
             if (sender is not PamhagenPlant plant) return;
             UpdateScheme(Mouse.GetPosition(SchemeCanvas), Mouse.LeftButton == MouseButtonState.Pressed);
         }
+
+        public void InitializePaths() {
+            var add = ReconstructSelectedPaths().ToList();
+            var remove = Graph.SelectedPaths.ToList();
+            foreach (var p in remove) Graph.RemovePath(p);
+            for (int i = 1; i <= 57; i++) {
+                App.Plant?.CloseV(i);
+            }
+            foreach (var p in add) {
+                if (p.Hops.Any(h => h.Node is Valve v && v.IsLocked)) continue;
+                Graph.AddPath(p);
+            }
+        }
+
+        public IEnumerable<Path> ReconstructSelectedPaths() {
+            if (App.Plant is not PamhagenPlant p) yield break;
+            var sources = Graph.Nodes.Where(n => n is ISource).ToList();
+            var sinks = Graph.Nodes.Where(n => n is ISink).ToList();
+            foreach (var src in sources) {
+                var paths = new List<Path>();
+                foreach (var sink in sinks) {
+                    paths.AddRange(Graph.GetPaths(src, sink, null, (n) => n is not ISink && (n is not Valve v || p.WantValveOpen(v.Nr))));
+                }
+                if (paths.Count == 1)
+                    yield return paths.First();
+            }
+        }
     }
 }