51 lines
1.8 KiB
Haskell
51 lines
1.8 KiB
Haskell
{-|
|
|
|
|
A 'MarketPrice' represents a historical exchange rate between two
|
|
commodities. (Ledger calls them historical prices.) For example, prices
|
|
published by a stock exchange or the foreign exchange market. Some
|
|
commands (balance, currently) can use this information to show the market
|
|
value of things at a given date.
|
|
|
|
-}
|
|
|
|
{-# LANGUAGE RecordWildCards #-}
|
|
|
|
module Hledger.Data.MarketPrice (
|
|
showMarketPrice
|
|
)
|
|
where
|
|
|
|
import qualified Data.Text as T
|
|
|
|
import Hledger.Data.Amount
|
|
import Hledger.Data.Dates
|
|
import Hledger.Data.Types
|
|
|
|
-- | Get the string representation of an market price, based on its
|
|
-- commodity's display settings.
|
|
showMarketPrice :: MarketPrice -> String
|
|
showMarketPrice mp = unwords
|
|
[ "P"
|
|
, showDate (mpdate mp)
|
|
, T.unpack (mpcommodity mp)
|
|
, (showAmount . setAmountPrecision maxprecision) (mpamount mp)
|
|
]
|
|
|
|
-- -- | Convert this posting's amount to its value on the given date in
|
|
-- -- its default valuation commodity, using market prices from the given journal.
|
|
-- postingValueAtDate :: Journal -> Day -> Posting -> Posting
|
|
-- postingValueAtDate j d p@Posting{..} = p{pamount=mixedAmountValue prices d pamount}
|
|
-- where
|
|
-- -- prices are in parse order - sort into date then parse order,
|
|
-- -- & reversed for quick lookup of the latest price.
|
|
-- prices = reverse $ sortOn mpdate $ jmarketprices j
|
|
|
|
-- -- | Find the best commodity to convert to when asked to show the
|
|
-- -- market value of this commodity on the given date. That is, the one
|
|
-- -- in which it has most recently been market-priced, ie the commodity
|
|
-- -- mentioned in the most recent applicable historical price directive
|
|
-- -- before this date.
|
|
-- -- defaultValuationCommodity :: Journal -> Day -> CommoditySymbol -> Maybe CommoditySymbol
|
|
-- -- defaultValuationCommodity j d c = mpamount <$> commodityValue j d c
|
|
|