1 files changed, 56 insertions, 0 deletions
diff --git a/addons/hw_drivers/event_manager.py b/addons/hw_drivers/event_manager.py
new file mode 100644
index 00000000..f76968f9
--- /dev/null
+++ b/addons/hw_drivers/event_manager.py
@@ -0,0 +1,56 @@
+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+import json
+from threading import Event
+import time
+
+from odoo.http import request
+
+class EventManager(object):
+    def __init__(self):
+        self.events = []
+        self.sessions = {}
+
+    def _delete_expired_sessions(self, max_time=70):
+        '''
+        Clears sessions that are no longer called.
+
+        :param max_time: time a session can stay unused before being deleted
+        '''
+        now = time.time()
+        expired_sessions = [
+            session
+            for session in self.sessions
+            if now - self.sessions[session]['time_request'] > max_time
+        ]
+        for session in expired_sessions:
+            del self.sessions[session]
+
+    def add_request(self, listener):
+        self.session = {
+            'session_id': listener['session_id'],
+            'devices': listener['devices'],
+            'event': Event(),
+            'result': {},
+            'time_request': time.time(),
+        }
+        self._delete_expired_sessions()
+        self.sessions[listener['session_id']] = self.session
+        return self.sessions[listener['session_id']]
+
+    def device_changed(self, device):
+        event = {
+            **device.data,
+            'device_identifier': device.device_identifier,
+            'time': time.time(),
+            'request_data': json.loads(request.params['data']) if request and 'data' in request.params else None,
+        }
+        self.events.append(event)
+        for session in self.sessions:
+            if device.device_identifier in self.sessions[session]['devices'] and not self.sessions[session]['event'].isSet():
+                self.sessions[session]['result'] = event
+                self.sessions[session]['event'].set()
+
+
+event_manager = EventManager()