Break up websocket component (#17003)

* Break up websocket component

* Lint

homeassistant/components/websocket_api/messages.py

@@ -0,0 +1,42 @@
+"""Message templates for websocket commands."""
+
+import voluptuous as vol
+
+from homeassistant.helpers import config_validation as cv
+
+from . import const
+
+
+# Minimal requirements of a message
+MINIMAL_MESSAGE_SCHEMA = vol.Schema({
+    vol.Required('id'): cv.positive_int,
+    vol.Required('type'): cv.string,
+}, extra=vol.ALLOW_EXTRA)
+
+# Base schema to extend by message handlers
+BASE_COMMAND_MESSAGE_SCHEMA = vol.Schema({
+    vol.Required('id'): cv.positive_int,
+})
+
+
+def result_message(iden, result=None):
+    """Return a success result message."""
+    return {
+        'id': iden,
+        'type': const.TYPE_RESULT,
+        'success': True,
+        'result': result,
+    }
+
+
+def error_message(iden, code, message):
+    """Return an error result message."""
+    return {
+        'id': iden,
+        'type': const.TYPE_RESULT,
+        'success': False,
+        'error': {
+            'code': code,
+            'message': message,
+        },
+    }