348 lines
		
	
	
		
			16 KiB
		
	
	
	
		
			Haskell
		
	
	
	
	
	
			
		
		
	
	
			348 lines
		
	
	
		
			16 KiB
		
	
	
	
		
			Haskell
		
	
	
	
	
	
| {- |
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| -}
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| 
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| {-# LANGUAGE CPP #-}
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| {-# LANGUAGE OverloadedStrings #-}
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| {-# LANGUAGE RecordWildCards #-}
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| {-# LANGUAGE ScopedTypeVariables #-}
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| 
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| module Hledger.Reports.BudgetReport
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| where
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| 
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| import Data.Decimal
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| import Data.List
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| import Data.List.Extra (nubSort)
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| import Data.Maybe
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| #if !(MIN_VERSION_base(4,11,0))
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| import Data.Monoid ((<>))
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| #endif
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| import Data.Ord
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| import Data.Time.Calendar
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| import Safe
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| --import Data.List
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| --import Data.Maybe
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| import qualified Data.Map as Map
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| import Data.Map (Map)
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| import qualified Data.Text as T
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| --import qualified Data.Text.Lazy as TL
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| --import System.Console.CmdArgs.Explicit as C
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| --import Lucid as L
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| import Text.Printf (printf)
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| import Text.Tabular as T
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| --import Text.Tabular.AsciiWide
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| 
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| import Hledger.Data
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| --import Hledger.Query
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| import Hledger.Utils
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| --import Hledger.Read (mamountp')
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| import Hledger.Reports.ReportOptions
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| import Hledger.Reports.ReportTypes
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| import Hledger.Reports.BalanceReport (sortAccountItemsLike)
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| import Hledger.Reports.MultiBalanceReport
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| 
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| 
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| type BudgetGoal    = Change
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| type BudgetTotal   = Total
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| type BudgetAverage = Average
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| 
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| -- | A budget report tracks expected and actual changes per account and subperiod.
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| type BudgetCell = (Maybe Change, Maybe BudgetGoal)
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| type BudgetReport = PeriodicReport AccountName BudgetCell
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| type BudgetReportRow = PeriodicReportRow AccountName BudgetCell
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| 
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| -- | Calculate budget goals from all periodic transactions,
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| -- actual balance changes from the regular transactions,
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| -- and compare these to get a 'BudgetReport'.
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| -- Unbudgeted accounts may be hidden or renamed (see budgetRollup).
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| budgetReport :: ReportOpts -> Bool -> DateSpan -> Day -> Journal -> BudgetReport
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| budgetReport ropts' assrt reportspan d j =
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|   let
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|     -- Budget report demands ALTree mode to ensure subaccounts and subaccount budgets are properly handled
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|     -- and that reports with and without --empty make sense when compared side by side
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|     ropts = ropts' { accountlistmode_ = ALTree }
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|     showunbudgeted = empty_ ropts
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|     budgetedaccts =
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|       dbg2 "budgetedacctsinperiod" $
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|       nub $
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|       concatMap expandAccountName $
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|       accountNamesFromPostings $
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|       concatMap tpostings $
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|       concatMap (`runPeriodicTransaction` reportspan) $
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|       jperiodictxns j
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|     actualj = dbg1With (("actualj"++).show.jtxns)  $ budgetRollUp budgetedaccts showunbudgeted j
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|     budgetj = dbg1With (("budgetj"++).show.jtxns)  $ budgetJournal assrt ropts reportspan j
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|     actualreport@(PeriodicReport actualspans _ _) =
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|         dbg1 "actualreport" $ multiBalanceReport d ropts actualj
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|     budgetgoalreport@(PeriodicReport _ budgetgoalitems budgetgoaltotals) =
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|         dbg1 "budgetgoalreport" $ multiBalanceReport d (ropts{empty_=True}) budgetj
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|     budgetgoalreport'
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|       -- If no interval is specified:
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|       -- budgetgoalreport's span might be shorter actualreport's due to periodic txns;
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|       -- it should be safe to replace it with the latter, so they combine well.
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|       | interval_ ropts == NoInterval = PeriodicReport actualspans budgetgoalitems budgetgoaltotals
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|       | otherwise = budgetgoalreport
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|     budgetreport = combineBudgetAndActual budgetgoalreport' actualreport
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|     sortedbudgetreport = sortBudgetReport ropts j budgetreport
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|   in
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|     dbg1 "sortedbudgetreport" sortedbudgetreport
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| 
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| -- | Sort a budget report's rows according to options.
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| sortBudgetReport :: ReportOpts -> Journal -> BudgetReport -> BudgetReport
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| sortBudgetReport ropts j (PeriodicReport ps rows trow) = PeriodicReport ps sortedrows trow
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|   where
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|     sortedrows
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|       | sort_amount_ ropts && tree_ ropts = sortTreeBURByActualAmount rows
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|       | sort_amount_ ropts                = sortFlatBURByActualAmount rows
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|       | otherwise                         = sortByAccountDeclaration rows
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| 
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|     -- Sort a tree-mode budget report's rows by total actual amount at each level.
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|     sortTreeBURByActualAmount :: [BudgetReportRow] -> [BudgetReportRow]
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|     sortTreeBURByActualAmount rows = sortedrows
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|       where
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|         anamesandrows = [(prrName r, r) | r <- rows]
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|         anames = map fst anamesandrows
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|         atotals = [(a, tot) | PeriodicReportRow a _ _ (tot,_) _ <- rows]
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|         accounttree = accountTree "root" anames
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|         accounttreewithbals = mapAccounts setibalance accounttree
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|           where
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|             setibalance a = a{aibalance=
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|               fromMaybe 0 $ -- when there's no actual amount, assume 0; will mess up with negative amounts ? TODO
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|               fromMaybe (error "sortTreeByAmount 1") $ -- should not happen, but it's ugly; TODO
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|               lookup (aname a) atotals
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|               }
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|         sortedaccounttree = sortAccountTreeByAmount (fromMaybe NormallyPositive $ normalbalance_ ropts) accounttreewithbals
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|         sortedanames = map aname $ drop 1 $ flattenAccounts sortedaccounttree
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|         sortedrows = sortAccountItemsLike sortedanames anamesandrows
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| 
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|     -- Sort a flat-mode budget report's rows by total actual amount.
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|     sortFlatBURByActualAmount :: [BudgetReportRow] -> [BudgetReportRow]
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|     sortFlatBURByActualAmount = case normalbalance_ ropts of
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|         Just NormallyNegative -> sortOn (fst . prrTotal)
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|         _                     -> sortOn (Down . fst . prrTotal)
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| 
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|     -- Sort the report rows by account declaration order then account name.
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|     -- <unbudgeted> remains at the top.
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|     sortByAccountDeclaration rows = sortedrows
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|       where
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|         (unbudgetedrow,rows') = partition ((=="<unbudgeted>") . prrName) rows
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|         anamesandrows = [(prrName r, r) | r <- rows']
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|         anames = map fst anamesandrows
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|         sortedanames = sortAccountNamesByDeclaration j (tree_ ropts) anames
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|         sortedrows = unbudgetedrow ++ sortAccountItemsLike sortedanames anamesandrows
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| 
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| -- | Use all periodic transactions in the journal to generate
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| -- budget transactions in the specified report period.
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| -- Budget transactions are similar to forecast transactions except
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| -- their purpose is to set goal amounts (of change) per account and period.
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| budgetJournal :: Bool -> ReportOpts -> DateSpan -> Journal -> Journal
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| budgetJournal assrt _ropts reportspan j =
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|   either error' id $ journalBalanceTransactions assrt j{ jtxns = budgetts }
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|   where
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|     budgetspan = dbg2 "budgetspan" $ reportspan
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|     budgetts =
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|       dbg1 "budgetts" $
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|       [makeBudgetTxn t
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|       | pt <- jperiodictxns j
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|       , t <- runPeriodicTransaction pt budgetspan
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|       ]
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|     makeBudgetTxn t = txnTieKnot $ t { tdescription = T.pack "Budget transaction" }
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| 
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| -- | Adjust a journal's account names for budget reporting, in two ways:
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| --
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| -- 1. accounts with no budget goal anywhere in their ancestry are moved
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| --    under the "unbudgeted" top level account.
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| --
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| -- 2. subaccounts with no budget goal are merged with their closest parent account
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| --    with a budget goal, so that only budgeted accounts are shown.
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| --    This can be disabled by --empty.
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| --
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| budgetRollUp :: [AccountName] -> Bool -> Journal -> Journal
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| budgetRollUp budgetedaccts showunbudgeted j = j { jtxns = remapTxn <$> jtxns j }
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|   where
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|     remapTxn = mapPostings (map remapPosting)
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|       where
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|         mapPostings f t = txnTieKnot $ t { tpostings = f $ tpostings t }
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|         remapPosting p = p { paccount = remapAccount $ paccount p, poriginal = Just . fromMaybe p $ poriginal p }
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|           where
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|             remapAccount a
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|               | hasbudget         = a
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|               | hasbudgetedparent = if showunbudgeted then a else budgetedparent
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|               | otherwise         = if showunbudgeted then u <> acctsep <> a else u
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|               where
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|                 hasbudget = a `elem` budgetedaccts
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|                 hasbudgetedparent = not $ T.null budgetedparent
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|                 budgetedparent = headDef "" $ filter (`elem` budgetedaccts) $ parentAccountNames a
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|                 u = unbudgetedAccountName
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| 
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| -- | Combine a per-account-and-subperiod report of budget goals, and one
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| -- of actual change amounts, into a budget performance report.
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| -- The two reports should have the same report interval, but need not
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| -- have exactly the same account rows or date columns.
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| -- (Cells in the combined budget report can be missing a budget goal,
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| -- an actual amount, or both.) The combined report will include:
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| --
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| -- - consecutive subperiods at the same interval as the two reports,
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| --   spanning the period of both reports
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| --
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| -- - all accounts mentioned in either report, sorted by account code or
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| --   account name or amount as appropriate.
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| --
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| combineBudgetAndActual :: MultiBalanceReport -> MultiBalanceReport -> BudgetReport
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| combineBudgetAndActual
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|       (PeriodicReport budgetperiods budgetrows (PeriodicReportRow _ _ budgettots budgetgrandtot budgetgrandavg))
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|       (PeriodicReport actualperiods actualrows (PeriodicReportRow _ _ actualtots actualgrandtot actualgrandavg)) =
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|     PeriodicReport periods rows totalrow
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|   where
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|     periods = nubSort . filter (/= nulldatespan) $ budgetperiods ++ actualperiods
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| 
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|     -- first, combine any corresponding budget goals with actual changes
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|     rows1 =
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|       [ PeriodicReportRow acct treeindent amtandgoals totamtandgoal avgamtandgoal
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|       | PeriodicReportRow acct treeindent actualamts actualtot actualavg <- actualrows
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|       , let mbudgetgoals       = Map.lookup acct budgetGoalsByAcct :: Maybe ([BudgetGoal], BudgetTotal, BudgetAverage)
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|       , let budgetmamts        = maybe (replicate (length periods) Nothing) (map Just . first3) mbudgetgoals :: [Maybe BudgetGoal]
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|       , let mbudgettot         = second3 <$> mbudgetgoals :: Maybe BudgetTotal
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|       , let mbudgetavg         = third3 <$> mbudgetgoals  :: Maybe BudgetAverage
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|       , let acctBudgetByPeriod = Map.fromList [ (p,budgetamt) | (p, Just budgetamt) <- zip budgetperiods budgetmamts ] :: Map DateSpan BudgetGoal
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|       , let acctActualByPeriod = Map.fromList [ (p,actualamt) | (p, Just actualamt) <- zip actualperiods (map Just actualamts) ] :: Map DateSpan Change
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|       , let amtandgoals        = [ (Map.lookup p acctActualByPeriod, Map.lookup p acctBudgetByPeriod) | p <- periods ] :: [BudgetCell]
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|       , let totamtandgoal      = (Just actualtot, mbudgettot)
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|       , let avgamtandgoal      = (Just actualavg, mbudgetavg)
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|       ]
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|       where
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|         budgetGoalsByAcct :: Map AccountName ([BudgetGoal], BudgetTotal, BudgetAverage) =
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|           Map.fromList [ (acct, (amts, tot, avg))
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|                          | PeriodicReportRow acct _ amts tot avg <- budgetrows ]
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| 
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|     -- next, make rows for budget goals with no actual changes
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|     rows2 =
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|       [ PeriodicReportRow acct treeindent amtandgoals totamtandgoal avgamtandgoal
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|       | PeriodicReportRow acct treeindent budgetgoals budgettot budgetavg <- budgetrows
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|       , acct `notElem` map prrName rows1
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|       , let acctBudgetByPeriod = Map.fromList $ zip budgetperiods budgetgoals :: Map DateSpan BudgetGoal
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|       , let amtandgoals        = [ (Nothing, Map.lookup p acctBudgetByPeriod) | p <- periods ] :: [BudgetCell]
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|       , let totamtandgoal      = (Nothing, Just budgettot)
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|       , let avgamtandgoal      = (Nothing, Just budgetavg)
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|       ]
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| 
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|     -- combine and re-sort rows
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|     -- TODO: use MBR code
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|     -- TODO: respect --sort-amount
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|     -- TODO: add --sort-budget to sort by budget goal amount
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|     rows :: [BudgetReportRow] =
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|       sortOn prrName $ rows1 ++ rows2
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| 
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|     -- TODO: grand total & average shows 0% when there are no actual amounts, inconsistent with other cells
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|     totalrow = PeriodicReportRow () 0
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|         [ (Map.lookup p totActualByPeriod, Map.lookup p totBudgetByPeriod) | p <- periods ]
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|         ( Just actualgrandtot, Just budgetgrandtot )
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|         ( Just actualgrandavg, Just budgetgrandavg )
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|       where
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|         totBudgetByPeriod = Map.fromList $ zip budgetperiods budgettots :: Map DateSpan BudgetTotal
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|         totActualByPeriod = Map.fromList $ zip actualperiods actualtots :: Map DateSpan Change
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| 
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| -- | Render a budget report as plain text suitable for console output.
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| budgetReportAsText :: ReportOpts -> BudgetReport -> String
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| budgetReportAsText ropts@ReportOpts{..} budgetr =
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|   title ++ "\n\n" ++
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|   tableAsText ropts showcell (maybetranspose $ budgetReportAsTable ropts budgetr)
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|   where
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|     multiperiod = interval_ /= NoInterval
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|     title = printf "Budget performance in %s%s:"
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|       (showDateSpan $ periodicReportSpan budgetr)
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|       (case value_ of
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|         Just (AtCost _mc)   -> ", valued at cost"
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|         Just (AtThen _mc)   -> error' unsupportedValueThenError  -- TODO
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|         Just (AtEnd _mc)    -> ", valued at period ends"
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|         Just (AtNow _mc)    -> ", current value"
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|         -- XXX duplicates the above
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|         Just (AtDefault _mc) | multiperiod -> ", valued at period ends"
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|         Just (AtDefault _mc)  -> ", current value"
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|         Just (AtDate d _mc) -> ", valued at "++showDate d
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|         Nothing             -> "")
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|     actualwidth = maximum' $ map fst amountsAndGoals
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|     budgetwidth = maximum' $ map snd amountsAndGoals
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|     amountsAndGoals = map (\(a,g) -> (amountLength a, amountLength g))
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|                     . concatMap prrAmounts $ prRows budgetr
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|       where amountLength = maybe 0 (length . showMixedAmountOneLineWithoutPrice)
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|     -- XXX lay out actual, percentage and/or goal in the single table cell for now, should probably use separate cells
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|     showcell :: BudgetCell -> String
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|     showcell (mactual, mbudget) = actualstr ++ " " ++ budgetstr
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|       where
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|         percentwidth = 4
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|         actual = fromMaybe 0 mactual
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|         actualstr = printf ("%"++show actualwidth++"s") (showamt actual)
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|         budgetstr = case mbudget of
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|           Nothing     -> replicate (percentwidth + 7 + budgetwidth) ' '
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|           Just budget ->
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|             case percentage actual budget of
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|               Just pct ->
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|                 printf ("[%"++show percentwidth++"s%% of %"++show budgetwidth++"s]")
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|                        (show $ roundTo 0 pct) (showbudgetamt budget)
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|               Nothing ->
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|                 printf ("["++replicate (percentwidth+5) ' '++"%"++show budgetwidth++"s]")
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|                        (showbudgetamt budget)
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| 
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|     -- | Calculate the percentage of actual change to budget goal to show, if any.
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|     -- If valuing at cost, both amounts are converted to cost before comparing.
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|     -- A percentage will not be shown if:
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|     -- - actual or goal are not the same, single, commodity
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|     -- - the goal is zero
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|     percentage :: Change -> BudgetGoal -> Maybe Percentage
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|     percentage actual budget =
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|       case (maybecost $ normaliseMixedAmount actual, maybecost $ normaliseMixedAmount budget) of
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|         (Mixed [a], Mixed [b]) | (acommodity a == acommodity b || isZeroAmount a) && not (isZeroAmount b)
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|             -> Just $ 100 * aquantity a / aquantity b
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|         _   -> -- trace (pshow $ (maybecost actual, maybecost budget))  -- debug missing percentage
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|                Nothing
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|       where
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|         maybecost = if valuationTypeIsCost ropts then costOfMixedAmount else id
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|     showamt :: MixedAmount -> String
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|     showamt | color_    = cshowMixedAmountOneLineWithoutPrice
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|             | otherwise = showMixedAmountOneLineWithoutPrice
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| 
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|     -- don't show the budget amount in color, it messes up alignment
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|     showbudgetamt = showMixedAmountOneLineWithoutPrice
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| 
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|     maybetranspose | transpose_ = \(Table rh ch vals) -> Table ch rh (transpose vals)
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|                    | otherwise  = id
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| 
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| -- | Build a 'Table' from a multi-column balance report.
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| budgetReportAsTable :: ReportOpts -> BudgetReport -> Table String String (Maybe MixedAmount, Maybe MixedAmount)
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| budgetReportAsTable
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|   ropts
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|   (PeriodicReport periods rows (PeriodicReportRow _ _ coltots grandtot grandavg)) =
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|     addtotalrow $
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|     Table
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|       (T.Group NoLine $ map Header accts)
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|       (T.Group NoLine $ map Header colheadings)
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|       (map rowvals rows)
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|   where
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|     colheadings = map showDateSpanMonthAbbrev periods
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|                   ++ ["  Total" | row_total_ ropts]
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|                   ++ ["Average" | average_ ropts]
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|     accts = map renderacct rows
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|     renderacct (PeriodicReportRow a i _ _ _)
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|       | tree_ ropts = replicate ((i-1)*2) ' ' ++ T.unpack (accountLeafName a)
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|       | otherwise   = T.unpack $ maybeAccountNameDrop ropts a
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|     rowvals (PeriodicReportRow _ _ as rowtot rowavg) =
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|         as ++ [rowtot | row_total_ ropts] ++ [rowavg | average_ ropts]
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|     addtotalrow
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|       | no_total_ ropts = id
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|       | otherwise = (+----+ (row "" $
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|                        coltots ++ [grandtot | row_total_ ropts && not (null coltots)]
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|                                ++ [grandavg | average_ ropts && not (null coltots)]
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|                     ))
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| 
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| -- XXX here for now
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| -- TODO: does not work for flat-by-default reports with --flat not specified explicitly
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| -- | Drop leading components of accounts names as specified by --drop, but only in --flat mode.
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| maybeAccountNameDrop :: ReportOpts -> AccountName -> AccountName
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| maybeAccountNameDrop opts a | flat_ opts = accountNameDrop (drop_ opts) a
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|                             | otherwise  = a
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| 
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| -- tests
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| 
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| tests_BudgetReport = tests "BudgetReport" [
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|  ]
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