Implement utils.OptionsSetting

modules/channel_op.py

@@ -19,8 +19,9 @@ class InvalidTimeoutException(Exception):
 @utils.export("channelset", utils.Setting("ban-format",
     "Set ban format ($n = nick, $u = username, $h = hostname)",
     example="*!$u@$h"))
-@utils.export("serverset", utils.Setting("mute-method",
-    "Set this server's method of muting users", example="qmode"))
+@utils.export("serverset", utils.OptionsSetting("mute-method",
+    ["qmode", "insp", "unreal"], "Set this server's method of muting users",
+    example="qmode"))
 class Module(ModuleManager.BaseModule):
     _name = "ChanOp"
 

modules/permissions/__init__.py

@@ -9,8 +9,9 @@ REQUIRES_IDENTIFY = "You need to be identified to use that command"
 REQUIRES_IDENTIFY_INTERNAL = ("You need to be identified to use that command "
  "(/msg %s register | /msg %s identify)")
 
-@utils.export("serverset", utils.Setting("identity-mechanism",
-    "Set the identity mechanism for this server", example="ircv3-account"))
+@utils.export("serverset", utils.OptionsSetting("identity-mechanism",
+    ["internal", "ircv3-account"], "Set the identity mechanism for this server",
+    example="ircv3-account"))
 class Module(ModuleManager.BaseModule):
     @utils.hook("new.user")
     def new_user(self, event):

src/utils/__init__.py

@@ -257,3 +257,15 @@ class IntSetting(Setting):
             return int(stripped)
         return None
 
+class OptionsSetting(Setting):
+    def __init__(self, name: str, options: typing.List[str], help: str=None,
+            example: str=None):
+        self._options = options
+        Setting.__init__(name, help, example)
+
+    def parse(self, value: str) -> typing.Any:
+        value_lower = value.lower()
+        for option in self._options:
+            if option.lower() == value_lower:
+                return option
+        return None