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lib: Use simpler MultiBalanceReport valuation calculations in more cases.

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Stephen Morgan 2020-10-29 14:33:45 +11:00 committed by Simon Michael
parent 35a83fbd8c
commit 4cd3ed15a0
1 changed files with 17 additions and 14 deletions
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31
hledger-lib/Hledger/Reports/MultiBalanceReport.hs
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@ -349,26 +349,29 @@ accumValueAmounts ropts valuation colspans startbals acctchanges = -- PARTIAL:
CumulativeChange -> cumulative
PeriodChange -> changeamts
where
-- Calculate the valued historical balance in each column, ensuring every
-- columns has an entry.
-- Calculate the valued balances in each column, ensuring every column has an entry.
historical = cumulativeSum startingBalance
-- If no valuation can sum the changes directly, otherwise need to
-- subtract the valued starting amount from the historical sum
cumulative = case value_ ropts of
Nothing -> cumulativeSum nullacct
Just _ -> fmap (`subtractAcct` valuedStart) historical
-- If no valuation can use the change list directly, otherwise need to
-- calculate the incremental differences in the historical sum
changeamts = case value_ ropts of
Nothing -> changes
Just _ -> let (dates, histamts) = unzip $ M.toAscList historical
in M.fromDistinctAscList . zip dates $
zipWith subtractAcct histamts (valuedStart:histamts)
cumulative | fixedValuationDate = cumulativeSum nullacct
| otherwise = fmap (`subtractAcct` valuedStart) historical
changeamts | fixedValuationDate = M.mapWithKey valueAcct changes
| otherwise = M.fromDistinctAscList . zip dates $
zipWith subtractAcct histamts (valuedStart:histamts)
where (dates, histamts) = unzip $ M.toAscList historical
cumulativeSum start = snd $ M.mapAccumWithKey accumValued start changes
where accumValued startAmt date newAmt = (s, valueAcct date s)
where s = sumAcct startAmt newAmt
-- Whether the market price is measured at the same date for all report
-- periods, and we can therefore use the simpler calculations for
-- cumulative and change reports.
fixedValuationDate = case value_ ropts of
Just (AtCost (Just _)) -> singleperiod
Just (AtEnd _) -> singleperiod
Just (AtDefault _) -> singleperiod
_ -> True
where singleperiod = interval_ ropts == NoInterval
changes = changes' <> zeros
startingBalance = HM.lookupDefault nullacct name startbals
valuedStart = valueAcct (DateSpan Nothing historicalDate) startingBalance