Documentation

Type encoding for a posting.

>>> :set -XDataKinds
>>> import Haspara.Accounting
>>> import Refined
>>> import qualified Data.Aeson as Aeson
>>> import qualified Data.List.NonEmpty as NE
>>> let date = read "2021-01-01"
>>> let oid = 1 :: Int
>>> let qty = $$(refineTH 42) :: UnsignedQuantity 2
>>> let event = EventDecrement date oid qty
>>> let account = Account AccountKindAsset ("Cash" :: String, 1 ::Int)
>>> let posting =  Posting . NE.fromList $ [(event, account)]
>>> let json = Aeson.encode posting
>>> json
"[[{\"qty\":42.0,\"obj\":1,\"date\":\"2021-01-01\",\"type\":\"DECREMENT\"},{\"kind\":\"ASSET\",\"object\":[\"Cash\",1]}]]"
>>> Aeson.decode json :: Maybe (Posting (String, Int) Int 2)
Just (Posting ((EventDecrement 2021-01-01 1 (Refined 42.00),Account {accountKind = AccountKindAsset, accountObject = ("Cash",1)}) :| []))
>>> Aeson.decode json == Just posting
True