This commit moves most of StoreKit-specific logic that was embedded into
DamusPurpleView and places it into a new PurpleStoreKitManager struct,
to make code more reusable and readable by separating view concerns from
StoreKit-specific concerns.
Most of the code here should be in feature parity with the previous
behavior. However, a few logical improvements were made alongside this
refactoring:
- Improved StoreKit transaction update monitoring logic: Previously the
view would stop listening for purchase updates after the first update.
However, I made the program continuously listen for purchase updates,
as recommended by Apple's documentation
(https://developer.apple.com/documentation/storekit/transaction/3851206-updates)
- Improved/simplified logic around getting extra information from the
products: Information and the handling of product information was
spread in a few separate places. I incorporated those bits of
information into central and uniform interfaces on DamusPurpleType, to
simplify logic and future changes.
Signed-off-by: Daniel D’Aquino <daniel@daquino.me>
Reviewed-by: William Casarin <jb55@jb55.com>
Signed-off-by: William Casarin <jb55@jb55.com>
d694c26b83