1 """ World and player state. """
3 from .scenes.base import WorldEvent
7 """ World and player state. """
10 self._state = self._build_initial_state()
14 return self._state["level"]
18 return self._state["roaches"]
20 def _build_initial_state(self):
23 self._build_roach("roachel", smart=True),
24 self._build_roach("roeginald", strong=True),
25 self._build_roach("roichard", fast=True),
26 self._build_roach("roupert"),
29 "smart", "strong", "fast",
39 def _build_roach(self, name, health=5, **kw):
47 def _apply_set(self, updates):
48 for name, value in updates.items():
49 parts = name.split(".")
52 if isinstance(obj, dict):
54 elif isinstance(obj, list):
57 raise KeyError("%r not found in world" % (name,))
58 obj[parts[-1]] = value
61 return WorldDictProxy(self._state)
63 def apply_event(self, action, *args, **kw):
65 return self._apply_set(*args, **kw)
66 raise ValueError("Unknown world event action: %r" % (action,))
69 def _maybe_subproxy(proxy, name, value):
70 """ Return a sub world proxy if appropriate. """
71 if isinstance(value, dict):
72 prefix = "%s%s." % (proxy._prefix, name)
73 return WorldDictProxy(value, _prefix=prefix, _top=proxy._top)
74 elif isinstance(value, list):
75 prefix = "%s%s." % (proxy._prefix, name)
76 return WorldListProxy(value, _prefix=prefix, _top=proxy._top)
81 """ Base for world proxies. """
83 def __init__(self, state, _prefix='', _top=None):
89 self.__dict__.update({
96 def _record_change(self, fullname, value):
97 self._events.append(WorldEvent("set", {
101 def pop_events(self):
102 events, self._events = self._events, []
106 class WorldDictProxy(WorldBaseProxy):
107 """ World dictionary proxy that records changes and produces events. """
111 (k, _maybe_subproxy(self, k, v)) for k, v in self._state.items())
113 def __setattr__(self, name, value):
114 self._top._record_change("%s%s" % (self._prefix, name), value)
116 def __getattr__(self, name):
117 # return None for attributes that don't exist
118 value = self._state.get(name)
119 return _maybe_subproxy(self, name, value)
122 class WorldListProxy(WorldBaseProxy):
123 """ World list proxy that records changes and produces events. """
125 def __setitem__(self, index, value):
126 self._top._record_change("%s%s" % (self._prefix, index), value)
128 def __getitem__(self, index):
129 return _maybe_subproxy(self, index, self._state[index])
132 return len(self._state)
135 return bool(self._state)