@callback delete!() :: :ok

Deletes all data in the data store.

@callback empty?() :: boolean()

Returns true if the DataSore is empty.

@callback fetch_rules(rule_name :: TimeZoneInfo.rule_name()) ::
  {:ok, rules :: [TimeZoneInfo.rule()]} | {:error, :rule_not_found}

Returns rules for a given rule_name.

@callback fetch_transitions(time_zone :: Calendar.time_zone()) ::
  {:ok, transitions :: [TimeZoneInfo.transition()]}
  | {:error, :transitions_not_found}

Returns the transitions for a given time_zone.

@callback get_time_zones([{:links, :ignore | :only | :include}]) :: [Calendar.time_zone()]

Returns the list of all available time zones with or without links. The option :links can be used to customize the list.

Values for :links:

• :ignore just the time zone names will be returned
• :only just the link name will be returned
• :include the time zone and link names will be returned

The list will be sorted.

@callback info() :: term()

Returns infos about the data store.

@callback put(data :: TimeZoneInfo.data()) :: :ok | :error

Puts the given data into the store.

@callback version() :: String.t() | nil

Returns the version of the IANA database from which the data was generated.