small improvementss

nullptr/missions/__init__.py

@@ -6,6 +6,7 @@ from nullptr.missions.probe import ProbeMission
 from nullptr.missions.idle import IdleMission
 from nullptr.missions.siphon import SiphonMission
 from nullptr.missions.haul import HaulMission
+from nullptr.missions.sit import SitMission
 
 def get_mission_class( mtype):
   types = {
@@ -17,6 +18,7 @@ def get_mission_class( mtype):
     'idle': IdleMission,
     'siphon': SiphonMission,
     'haul': HaulMission,
+    'sit': SitMission,
     
   }
   if mtype not in types:

nullptr/missions/base.py

@@ -175,6 +175,9 @@ class BaseMission(Mission):
     self.sts('balance', balance)
     return balance
   
+  def step_pass(self):
+    pass
+    
   def step_go_dest(self):
     destination = self.rst(Waypoint, 'destination')
     if self.ship.location() == destination:

nullptr/missions/sit.py

@@ -0,0 +1,23 @@
+from nullptr.missions.base import BaseMission, MissionParam
+from nullptr.models.waypoint import Waypoint
+
+class SitMission(BaseMission):
+  def start_state(self):
+    return 'travel-to'
+  
+  @classmethod
+  def params(cls):
+    return {
+      'dest': MissionParam(Waypoint, True)
+    }
+  
+  def steps(self):
+    return { 
+      **self.travel_steps('to', 'dest', 'sit'),
+      'sit': (self.step_pass, 'done', self.wait_forever)
+      }
+      
+  def wait_forever(self):
+    return 0
+    
+