Refactored to new global json saving and loading (#10677)

* Refactored to new global json saving and loading

* Fixed emulated_hue tests

* Removed unnecassary error handling

* Added missing newline

* Remove unused imports

* Fixed linting error

* Moved _load_json wrapper out of the config class

homeassistant/components/notify/matrix.py

@@ -5,7 +5,6 @@ For more details about this platform, please refer to the documentation at
 https://home-assistant.io/components/notify.matrix/
 """
 import logging
-import json
 import os
 from urllib.parse import urlparse
 
@@ -15,6 +14,7 @@ import homeassistant.helpers.config_validation as cv
 from homeassistant.components.notify import (ATTR_TARGET, PLATFORM_SCHEMA,
                                              BaseNotificationService)
 from homeassistant.const import CONF_USERNAME, CONF_PASSWORD, CONF_VERIFY_SSL
+from homeassistant.util.json import load_json, save_json
 
 REQUIREMENTS = ['matrix-client==0.0.6']
 
@@ -82,8 +82,7 @@ class MatrixNotificationService(BaseNotificationService):
             return {}
 
         try:
-            with open(self.session_filepath) as handle:
-                data = json.load(handle)
+            data = load_json(self.session_filepath)
 
             auth_tokens = {}
             for mx_id, token in data.items():
@@ -101,16 +100,7 @@ class MatrixNotificationService(BaseNotificationService):
         """Store authentication token to session and persistent storage."""
         self.auth_tokens[self.mx_id] = token
 
-        try:
-            with open(self.session_filepath, 'w') as handle:
-                handle.write(json.dumps(self.auth_tokens))
-
-        # Not saving the tokens to disk should not stop the client, we can just
-        # login using the password every time.
-        except (OSError, IOError, PermissionError) as ex:
-            _LOGGER.warning(
-                "Storing authentication tokens to file '%s' failed: %s",
-                self.session_filepath, str(ex))
+        save_json(self.session_filepath, self.auth_tokens)
 
     def login(self):
         """Login to the matrix homeserver and return the client instance."""