X-Git-Url: https://git.ctpug.org.za/?a=blobdiff_plain;f=koperkapel%2Fworld.py;h=28f98b3da91ccad0365c2eb45ef0c12b3373ac23;hb=7a6f009672c912301b833797d4c135747e425828;hp=efb64030587c2bdc95aa697a67fb869dcf766112;hpb=4e59ab6a38bba2eccd59cee633dc4fd391c12100;p=koperkapel.git

diff --git a/koperkapel/world.py b/koperkapel/world.py
index efb6403..28f98b3 100644
--- a/koperkapel/world.py
+++ b/koperkapel/world.py
@@ -1,5 +1,7 @@
 """ World and player state. """
 
+from .scenes.base import WorldEvent
+
 
 class World:
     """ World and player state. """
@@ -9,7 +11,7 @@ class World:
 
     @property
     def level(self):
-        return self._level["level"]
+        return self._state["level"]
 
     @property
     def roaches(self):
@@ -23,7 +25,7 @@ class World:
             self._build_roach("roichard", quickness=3),
         ]
         state["level"] = {
-            "file": "level1.json",
+            "name": "level1",
         }
         return state
 
@@ -40,5 +42,84 @@ class World:
             "attributes": attributes,
         }
 
-    def apply_event(self, *args, **kw):
-        pass
+    def _apply_set(self, updates):
+        for name, value in updates.items():
+            parts = name.split(".")
+            obj = self._state
+            for p in parts[:-1]:
+                if isinstance(obj, dict):
+                    obj = obj[p]
+                elif isinstance(obj, list):
+                    obj = obj[int(p)]
+                else:
+                    raise KeyError("%r not found in world" % (name,))
+            obj[parts[-1]] = value
+
+    def proxy(self):
+        return WorldDictProxy(self._state)
+
+    def apply_event(self, action, *args, **kw):
+        if action == "set":
+            return self._apply_set(*args, **kw)
+        raise ValueError("Unknown world event action: %r" % (action,))
+
+
+def _maybe_subproxy(proxy, name, value):
+    """ Return a sub world proxy if appropriate. """
+    if isinstance(value, dict):
+        prefix = "%s%s." % (proxy._prefix, name)
+        return WorldDictProxy(value, _prefix=prefix, _top=proxy._top)
+    elif isinstance(value, list):
+        prefix = "%s%s." % (proxy._prefix, name)
+        return WorldListProxy(value, _prefix=prefix, _top=proxy._top)
+    return value
+
+
+class WorldBaseProxy:
+    """ Base for world proxies. """
+
+    def __init__(self, state, _prefix='', _top=None):
+        if _top is None:
+            _top = self
+            _events = []
+        else:
+            _events = None
+        self.__dict__.update({
+            "_state": state,
+            "_prefix": _prefix,
+            "_top": _top,
+            "_events": _events,
+        })
+
+    def _record_change(self, fullname, value):
+        self._events.append(WorldEvent("set", {
+            fullname: value
+        }))
+
+    def pop_events(self):
+        events, self._events = self._events, []
+        return events
+
+
+class WorldDictProxy(WorldBaseProxy):
+    """ World dictionary proxy that records changes and produces events. """
+
+    def items(self):
+        return (
+            (k, _maybe_subproxy(self, k, v)) for k, v in self._state.items())
+
+    def __setattr__(self, name, value):
+        self._top._record_change("%s%s" % (self._prefix, name), value)
+
+    def __getattr__(self, name):
+        return _maybe_subproxy(self, name, self._state[name])
+
+
+class WorldListProxy(WorldBaseProxy):
+    """ World list proxy that records changes and produces events. """
+
+    def __setitem__(self, index, value):
+        self._top._record_change("%s%s" % (self._prefix, index), value)
+
+    def __getitem__(self, index):
+        return _maybe_subproxy(self, index, self._state[index])