Return what is supported by a compute node

Ref https://github.com/GNS3/gns3-gui/issues/1448

gns3server/compute/base_manager.py

@@ -58,6 +58,14 @@ class BaseManager:
         self._port_manager = None
         self._config = Config.instance()
 
+    @classmethod
+    def node_types(cls):
+        """
+        :returns: Array of supported node type on this computer
+        """
+        # By default we transform DockerVM => docker but you can override this (see builtins)
+        return [cls._NODE_CLASS.__name__.rstrip('VM').lower()]
+
     @property
     def nodes(self):
         """

gns3server/compute/builtin/__init__.py

@@ -34,3 +34,10 @@ class Builtin(BaseManager):
     def __init__(self):
 
         super().__init__()
+
+    @classmethod
+    def node_types(cls):
+        """
+        :returns: List of node type supported by this class and computer
+        """
+        return ['cloud', 'nat', 'ethernet_hub', 'ethernet_switch']

gns3server/compute/dynamips/__init__.py

@@ -116,6 +116,13 @@ class Dynamips(BaseManager):
         self._dynamips_path = None
         self._dynamips_ids = {}
 
+    @classmethod
+    def node_types(cls):
+        """
+        :returns: List of node type supported by this class and computer
+        """
+        return ['dynamips', 'frame_relay_switch', 'atm_switch']
+
     def get_dynamips_id(self, project_id):
         """
         :param project_id: UUID of the project