misc: refactored code to work as a setup.py based package

Signed-off-by: Simone Margaritelli <evilsocket@gmail.com>

pwnagotchi/ui/state.py

@@ -0,0 +1,52 @@
+from threading import Lock
+
+
+class State(object):
+    def __init__(self, state={}):
+        self._state = state
+        self._lock = Lock()
+        self._listeners = {}
+        self._changes = {}
+
+    def add_element(self, key, elem):
+        self._state[key] = elem
+        self._changes[key] = True
+
+    def add_listener(self, key, cb):
+        with self._lock:
+            self._listeners[key] = cb
+
+    def items(self):
+        with self._lock:
+            return self._state.items()
+
+    def get(self, key):
+        with self._lock:
+            return self._state[key].value if key in self._state else None
+
+    def reset(self):
+        with self._lock:
+            self._changes = {}
+
+    def changes(self, ignore=()):
+        with self._lock:
+            changes = []
+            for change in self._changes.keys():
+                if change not in ignore:
+                    changes.append(change)
+            return changes
+
+    def has_changes(self):
+        with self._lock:
+            return len(self._changes) > 0
+
+    def set(self, key, value):
+        with self._lock:
+            if key in self._state:
+                prev = self._state[key].value
+                self._state[key].value = value
+
+                if prev != value:
+                    self._changes[key] = True
+                    if key in self._listeners and self._listeners[key] is not None:
+                        self._listeners[key](prev, value)