Solver: Mage: Fix node name generator.

src/Solver/Mage.py

@@ -123,11 +123,15 @@ class Mage(CommandLineSolver):
 
     _l_alph = len(_alph)
 
+    _nodes_cnt = 0
+    _nodes_names = {}
+    _nodes_views = set()
+
     def get_reach_name(self, reach):
         return f"Reach_{reach.pamhyr_id:>3}".replace(" ", "0")
 
     def get_node_name(self, node):
-        """Generate a 3 char name from node pamhyr_id
+        """Generate a 3 char name for node
 
         Args:
             node: The node
@@ -137,18 +141,33 @@ class Mage(CommandLineSolver):
         """
         n = node.pamhyr_id
 
-        return "".join(
-            list(
+        if n in self._nodes_names:
+            return self._nodes_names[n]
+
+        name = ""
+
+        checked_new = False
+        while not checked_new:
+            self._nodes_cnt += 1
+            nc = self._nodes_cnt
+
+            name = "".join(
                 map(
                     lambda i: self._alph[i % self._l_alph],
                     [
-                        int(n/1000),
-                        int(n/10),
-                        n
+                        int(nc / (self._l_alph * self._l_alph)),
+                        int(nc / self._l_alph),
+                        nc
                     ]
                 )
             )
-        )
+
+            checked_new = name not in self._nodes_views
+
+        self._nodes_views.add(name)
+        self._nodes_names[n] = name
+
+        return name
 
     def cmd_args(self, study):
         lst = super(Mage, self).cmd_args(study)