Passman.Core.Config.Optional

OptionalConfig type

type OptionalConfig = Map String String

The optional configuration of the password manager

Query

lookup :: Read a => String -> OptionalConfig -> Maybe a

Lookup the value of a key in the config. Returns Nothing if key not found, or if value can not be parsed as the desired type.

Construction

empty :: OptionalConfig

Contains no configuration values

Insertion

insert :: Show a => String -> a -> OptionalConfig -> OptionalConfig

Insert a new key and value in the config. If the key is already present, the associated value is replaced with the supplied value.

Delete/Update

delete :: String -> OptionalConfig -> OptionalConfig

Delete a key and its value from the config.

adjust :: (Show a, Read a) => (a -> a) -> String -> OptionalConfig -> OptionalConfig

Update a value at a specific key with the result of the provided function. The value is left unchanged if it could not be parsed as the desired type.

update :: (Show a, Read a) => (a -> Maybe a) -> String -> OptionalConfig -> OptionalConfig

The expression (update f k config) updates the value x at k (if it is in the config). If (f x) is Nothing, the element is deleted. If it is (Just y), the key k is bound to the new value y. The value is left unchanged if it could not be parsed as the desired type.

alter :: (Show a, Read a) => (Maybe a -> Maybe a) -> String -> OptionalConfig -> OptionalConfig

The expression (alter f k config) alters the value x at k, or absence thereof. The value is left unchanged if it could not be parsed as the desired type.