Move config file modification to Config class

src/Config.py

@@ -303,5 +303,36 @@ class Config(object):
 
         ConfigPlugin(self)
 
+    def saveValue(self, key, value):
+        if not os.path.isfile(self.config_file):
+            content = ""
+        else:
+            content = open(self.config_file).read()
+        lines = content.splitlines()
+
+        global_line_i = None
+        key_line_i = None
+        i = 0
+        for line in lines:
+            if line.strip() == "[global]":
+                global_line_i = i
+            if line.startswith(key + " = "):
+                key_line_i = i
+            i += 1
+
+        if value is None:  # Delete line
+            if key_line_i:
+                del lines[key_line_i]
+        else:  # Add / update
+            new_line = "%s = %s" % (key, str(value).replace("\n", "").replace("\r", ""))
+            if key_line_i:  # Already in the config, change the line
+                lines[key_line_i] = new_line
+            elif global_line_i is None:  # No global section yet, append to end of file
+                lines.append("[global]")
+                lines.append(new_line)
+            else:  # Has global section, append the line after it
+                lines.insert(global_line_i + 1, new_line)
+
+        open(self.config_file, "w").write("\n".join(lines))
 
 config = Config(sys.argv)

src/Ui/UiWebsocket.py

@@ -712,34 +712,5 @@ class UiWebsocket(object):
             self.response(to, "denied")
             return
 
-        if not os.path.isfile(config.config_file):
+        config.saveValue(key, value)
-            content = ""
-        else:
-            content = open(config.config_file).read()
-        lines = content.splitlines()
-
-        global_line_i = None
-        key_line_i = None
-        i = 0
-        for line in lines:
-            if line.strip() == "[global]":
-                global_line_i = i
-            if line.startswith(key + " = "):
-                key_line_i = i
-            i += 1
-
-        if value is None:  # Delete line
-            if key_line_i:
-                del lines[key_line_i]
-        else:  # Add / update
-            new_line = "%s = %s" % (key, value.replace("\n", "").replace("\r", ""))
-            if key_line_i:  # Already in the config, change the line
-                lines[key_line_i] = new_line
-            elif global_line_i is None:  # No global section yet, append to end of file
-                lines.append("[global]")
-                lines.append(new_line)
-            else:  # Has global section, append the line after it
-                lines.insert(global_line_i + 1, new_line)
-
-        open(config.config_file, "w").write("\n".join(lines))
         self.response(to, "ok")