21adfe2c25
The previous #2153 fix used accountNameTreeFrom, but it turns out this has always had O(n^2) performance, so our tests with 10k accounts ran even slower than before. Now it's faster, the main #2153 slowdown should really be fixed, and other commands which build an account tree should also be free of this slowdown when there are very many accounts.
454 lines
20 KiB
Haskell
454 lines
20 KiB
Haskell
{-# LANGUAGE NoMonomorphismRestriction #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-|
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'AccountName's are strings like @assets:cash:petty@, with multiple
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components separated by ':'. From a set of these we derive the account
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hierarchy.
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-}
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module Hledger.Data.AccountName (
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accountLeafName
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,accountNameComponents
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,accountNameDrop
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,accountNameFromComponents
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,accountNameLevel
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,accountNameToAccountOnlyRegex
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,accountNameToAccountOnlyRegexCI
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,accountNameToAccountRegex
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,accountNameToAccountRegexCI
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,accountNameTreeFrom
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,accountSummarisedName
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,accountNameInferType
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,accountNameType
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,assetAccountRegex
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,cashAccountRegex
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,liabilityAccountRegex
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,equityAccountRegex
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,conversionAccountRegex
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,revenueAccountRegex
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,expenseAccountRegex
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,acctsep
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,acctsepchar
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,clipAccountName
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,clipOrEllipsifyAccountName
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,elideAccountName
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,escapeName
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,expandAccountName
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,expandAccountNames
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,isAccountNamePrefixOf
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-- ,isAccountRegex
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,isSubAccountNameOf
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,parentAccountName
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,parentAccountNames
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,subAccountNamesFrom
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,topAccountNames
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,topAccountName
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,unbudgetedAccountName
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,accountNamePostingType
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,accountNameWithoutPostingType
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,accountNameWithPostingType
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,joinAccountNames
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,concatAccountNames
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,accountNameApplyAliases
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,accountNameApplyAliasesMemo
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,accountNameToBeancount
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,beancountTopLevelAccounts
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,tests_AccountName
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)
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where
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import Control.Applicative ((<|>))
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import Control.Monad (foldM)
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import Data.Foldable (asum, toList)
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import qualified Data.List.NonEmpty as NE
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import qualified Data.Map as M
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import Data.MemoUgly (memo)
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import qualified Data.Set as S
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import Data.Text (Text)
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import qualified Data.Text as T
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import Data.Tree (Tree(..), unfoldTree)
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import Safe
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import Text.DocLayout (realLength)
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import Hledger.Data.Types hiding (asubs)
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import Hledger.Utils
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import Data.Char (isDigit, isLetter)
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import Data.List (partition)
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-- $setup
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-- >>> :set -XOverloadedStrings
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acctsepchar :: Char
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acctsepchar = ':'
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acctsep :: Text
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acctsep = T.pack [acctsepchar]
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-- accountNameComponents :: AccountName -> [String]
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-- accountNameComponents = splitAtElement acctsepchar
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accountNameComponents :: AccountName -> [Text]
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accountNameComponents = T.splitOn acctsep
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accountNameFromComponents :: [Text] -> AccountName
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accountNameFromComponents = T.intercalate acctsep
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accountLeafName :: AccountName -> Text
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accountLeafName = last . accountNameComponents
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-- | Truncate all account name components but the last to two characters.
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accountSummarisedName :: AccountName -> Text
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accountSummarisedName a
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-- length cs > 1 = take 2 (head cs) ++ ":" ++ a'
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| length cs > 1 = T.intercalate ":" (map (T.take 2) $ init cs) <> ":" <> a'
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| otherwise = a'
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where
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cs = accountNameComponents a
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a' = accountLeafName a
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-- | Regular expressions matching common English top-level account names,
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-- used as a fallback when account types are not declared.
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assetAccountRegex = toRegexCI' "^assets?(:|$)"
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cashAccountRegex = toRegexCI' "^assets?(:.+)?:(cash|bank|che(ck|que?)(ing)?|savings?|current)(:|$)"
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liabilityAccountRegex = toRegexCI' "^(debts?|liabilit(y|ies))(:|$)"
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equityAccountRegex = toRegexCI' "^equity(:|$)"
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conversionAccountRegex = toRegexCI' "^equity:(trad(e|ing)|conversion)s?(:|$)"
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revenueAccountRegex = toRegexCI' "^(income|revenue)s?(:|$)"
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expenseAccountRegex = toRegexCI' "^expenses?(:|$)"
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-- | Try to guess an account's type from its name,
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-- matching common English top-level account names.
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accountNameInferType :: AccountName -> Maybe AccountType
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accountNameInferType a
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| regexMatchText cashAccountRegex a = Just Cash
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| regexMatchText assetAccountRegex a = Just Asset
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| regexMatchText liabilityAccountRegex a = Just Liability
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| regexMatchText conversionAccountRegex a = Just Conversion
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| regexMatchText equityAccountRegex a = Just Equity
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| regexMatchText revenueAccountRegex a = Just Revenue
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| regexMatchText expenseAccountRegex a = Just Expense
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| otherwise = Nothing
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-- Extract the 'AccountType' of an 'AccountName' by looking it up in the
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-- provided Map, traversing the parent accounts if necessary. If none of those
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-- work, try 'accountNameInferType'.
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accountNameType :: M.Map AccountName AccountType -> AccountName -> Maybe AccountType
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accountNameType atypes a = asum (map (`M.lookup` atypes) $ a : parentAccountNames a)
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<|> accountNameInferType a
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accountNameLevel :: AccountName -> Int
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accountNameLevel "" = 0
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accountNameLevel a = T.length (T.filter (==acctsepchar) a) + 1
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-- | A top-level account prefixed to some accounts in budget reports.
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-- Defined here so it can be ignored by accountNameDrop.
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unbudgetedAccountName :: T.Text
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unbudgetedAccountName = "<unbudgeted>"
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accountNamePostingType :: AccountName -> PostingType
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accountNamePostingType a
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| T.null a = RegularPosting
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| T.head a == '[' && T.last a == ']' = BalancedVirtualPosting
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| T.head a == '(' && T.last a == ')' = VirtualPosting
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| otherwise = RegularPosting
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accountNameWithoutPostingType :: AccountName -> AccountName
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accountNameWithoutPostingType a = case accountNamePostingType a of
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BalancedVirtualPosting -> textUnbracket a
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VirtualPosting -> textUnbracket a
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RegularPosting -> a
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accountNameWithPostingType :: PostingType -> AccountName -> AccountName
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accountNameWithPostingType BalancedVirtualPosting = wrap "[" "]" . accountNameWithoutPostingType
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accountNameWithPostingType VirtualPosting = wrap "(" ")" . accountNameWithoutPostingType
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accountNameWithPostingType RegularPosting = accountNameWithoutPostingType
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-- | Prefix one account name to another, preserving posting type
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-- indicators like concatAccountNames.
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joinAccountNames :: AccountName -> AccountName -> AccountName
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joinAccountNames a b = concatAccountNames $ filter (not . T.null) [a,b]
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-- | Join account names into one. If any of them has () or [] posting type
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-- indicators, these (the first type encountered) will also be applied to
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-- the resulting account name.
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concatAccountNames :: [AccountName] -> AccountName
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concatAccountNames as = accountNameWithPostingType t $ T.intercalate ":" $ map accountNameWithoutPostingType as
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where t = headDef RegularPosting $ filter (/= RegularPosting) $ map accountNamePostingType as
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-- | Rewrite an account name using all matching aliases from the given list, in sequence.
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-- Each alias sees the result of applying the previous aliases.
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-- Or, return any error arising from a bad regular expression in the aliases.
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accountNameApplyAliases :: [AccountAlias] -> AccountName -> Either RegexError AccountName
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accountNameApplyAliases aliases a =
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let (name,typ) = (accountNameWithoutPostingType a, accountNamePostingType a)
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in foldM
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(\acct alias -> dbg6 "result" $ aliasReplace (dbg6 "alias" alias) (dbg6 "account" acct))
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name
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aliases
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>>= Right . accountNameWithPostingType typ
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-- | Memoising version of accountNameApplyAliases, maybe overkill.
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accountNameApplyAliasesMemo :: [AccountAlias] -> AccountName -> Either RegexError AccountName
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accountNameApplyAliasesMemo aliases = memo (accountNameApplyAliases aliases)
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-- XXX re-test this memoisation
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-- aliasMatches :: AccountAlias -> AccountName -> Bool
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-- aliasMatches (BasicAlias old _) a = old `isAccountNamePrefixOf` a
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-- aliasMatches (RegexAlias re _) a = regexMatchesCI re a
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aliasReplace :: AccountAlias -> AccountName -> Either RegexError AccountName
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aliasReplace (BasicAlias old new) a
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| old `isAccountNamePrefixOf` a || old == a =
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Right $ new <> T.drop (T.length old) a
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| otherwise = Right a
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aliasReplace (RegexAlias re repl) a =
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fmap T.pack . regexReplace re repl $ T.unpack a -- XXX
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-- | Remove some number of account name components from the front of the account name.
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-- If the special "<unbudgeted>" top-level account is present, it is preserved and
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-- dropping affects the rest of the account name.
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accountNameDrop :: Int -> AccountName -> AccountName
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accountNameDrop n a
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| a == unbudgetedAccountName = a
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| unbudgetedAccountAndSep `T.isPrefixOf` a =
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case accountNameDrop n $ T.drop (T.length unbudgetedAccountAndSep) a of
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"" -> unbudgetedAccountName
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a' -> unbudgetedAccountAndSep <> a'
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| otherwise = accountNameFromComponentsOrElide . drop n $ accountNameComponents a
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where
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unbudgetedAccountAndSep = unbudgetedAccountName <> acctsep
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accountNameFromComponentsOrElide [] = "..."
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accountNameFromComponentsOrElide xs = accountNameFromComponents xs
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-- | Sorted unique account names implied by these account names,
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-- ie these plus all their parent accounts up to the root.
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-- Eg: ["a:b:c","d:e"] -> ["a","a:b","a:b:c","d","d:e"]
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expandAccountNames :: [AccountName] -> [AccountName]
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expandAccountNames = toList . foldMap (S.fromList . expandAccountName)
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-- | "a:b:c" -> ["a","a:b","a:b:c"]
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expandAccountName :: AccountName -> [AccountName]
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expandAccountName = map accountNameFromComponents . NE.tail . NE.inits . accountNameComponents
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-- | ["a:b:c","d:e"] -> ["a","d"]
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topAccountNames :: [AccountName] -> [AccountName]
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topAccountNames = filter ((1==) . accountNameLevel) . expandAccountNames
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-- | "a:b:c" -> "a"
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topAccountName :: AccountName -> AccountName
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topAccountName = T.takeWhile (/= acctsepchar)
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parentAccountName :: AccountName -> AccountName
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parentAccountName = accountNameFromComponents . init . accountNameComponents
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parentAccountNames :: AccountName -> [AccountName]
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parentAccountNames a = parentAccountNames' $ parentAccountName a
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where
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parentAccountNames' "" = []
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parentAccountNames' a2 = a2 : parentAccountNames' (parentAccountName a2)
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-- | Is the first account a parent or other ancestor of (and not the same as) the second ?
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isAccountNamePrefixOf :: AccountName -> AccountName -> Bool
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isAccountNamePrefixOf = T.isPrefixOf . (<> acctsep)
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isSubAccountNameOf :: AccountName -> AccountName -> Bool
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s `isSubAccountNameOf` p =
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(p `isAccountNamePrefixOf` s) && (accountNameLevel s == (accountNameLevel p + 1))
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-- | From a list of account names, select those which are direct
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-- subaccounts of the given account name.
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subAccountNamesFrom :: [AccountName] -> AccountName -> [AccountName]
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subAccountNamesFrom accts a = filter (`isSubAccountNameOf` a) accts
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-- | Convert a list of account names to a tree, efficiently.
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accountNameTreeFrom :: [AccountName] -> Tree AccountName
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accountNameTreeFrom accts = unfoldTree grow ("root", expandAccountNames accts)
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where
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-- unfoldTree :: (b -> (a, [b])) -> b -> Tree a
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-- grow :: (b -> (a, [b]))
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-- a = AccountName - the label at each node of the tree
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-- b = (AccountName, [AccountName]) - the next node's account, and the accounts remaining to consume under it
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grow :: ((AccountName, [AccountName]) -> (AccountName, [(AccountName, [AccountName])]))
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grow (a,[]) = (a,[])
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grow (a,rest) = (a, [(s, filter (s `isAccountNamePrefixOf`) deepersubs) | s <- asubs])
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where
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(asubs, deepersubs) = partition (isChildOf a) rest
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isChildOf "root" = (1==) . accountNameLevel
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isChildOf acct = (`isSubAccountNameOf` acct)
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-- | Elide an account name to fit in the specified width.
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-- From the ledger 2.6 news:
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--
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-- @
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-- What Ledger now does is that if an account name is too long, it will
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-- start abbreviating the first parts of the account name down to two
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-- letters in length. If this results in a string that is still too
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-- long, the front will be elided -- not the end. For example:
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--
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-- Expenses:Cash ; OK, not too long
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-- Ex:Wednesday:Cash ; "Expenses" was abbreviated to fit
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-- Ex:We:Afternoon:Cash ; "Expenses" and "Wednesday" abbreviated
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-- ; Expenses:Wednesday:Afternoon:Lunch:Snack:Candy:Chocolate:Cash
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-- ..:Af:Lu:Sn:Ca:Ch:Cash ; Abbreviated and elided!
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-- @
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elideAccountName :: Int -> AccountName -> AccountName
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elideAccountName width s
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-- XXX special case for transactions register's multi-account pseudo-names
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| " (split)" `T.isSuffixOf` s =
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let
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names = T.splitOn ", " $ T.take (T.length s - 8) s
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widthpername = max 0 (width - 8 - 2 * (max 1 (length names) - 1)) `div` length names
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in
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fitText Nothing (Just width) True False $
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(<>" (split)") $
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T.intercalate ", "
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[accountNameFromComponents $ elideparts widthpername [] $ accountNameComponents s' | s' <- names]
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| otherwise =
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fitText Nothing (Just width) True False $ accountNameFromComponents $ elideparts width [] $ accountNameComponents s
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where
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elideparts :: Int -> [Text] -> [Text] -> [Text]
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elideparts w done ss
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| realLength (accountNameFromComponents $ done++ss) <= w = done++ss
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| length ss > 1 = elideparts w (done++[textTakeWidth 2 $ head ss]) (tail ss)
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| otherwise = done++ss
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-- | Keep only the first n components of an account name, where n
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-- is a positive integer. If n is Just 0, returns the empty string, if n is
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-- Nothing, return the full name.
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clipAccountName :: Maybe Int -> AccountName -> AccountName
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clipAccountName Nothing = id
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clipAccountName (Just n) = accountNameFromComponents . take n . accountNameComponents
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-- | Keep only the first n components of an account name, where n
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-- is a positive integer. If n is Just 0, returns "...", if n is Nothing, return
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-- the full name.
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clipOrEllipsifyAccountName :: Maybe Int -> AccountName -> AccountName
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clipOrEllipsifyAccountName (Just 0) = const "..."
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clipOrEllipsifyAccountName n = clipAccountName n
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-- | Escape an AccountName for use within a regular expression.
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-- >>> putStr . T.unpack $ escapeName "First?!#$*?$(*) !@^#*? %)*!@#"
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-- First\?!#\$\*\?\$\(\*\) !@\^#\*\? %\)\*!@#
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escapeName :: AccountName -> Text
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escapeName = T.concatMap escapeChar
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where
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escapeChar c = if c `elem` escapedChars then T.snoc "\\" c else T.singleton c
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escapedChars = ['[', '?', '+', '|', '(', ')', '*', '$', '^', '\\']
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-- | Convert an account name to a regular expression matching it and its subaccounts.
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accountNameToAccountRegex :: AccountName -> Regexp
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accountNameToAccountRegex a = toRegex' $ "^" <> escapeName a <> "(:|$)" -- PARTIAL: Is this safe after escapeName?
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-- | Convert an account name to a regular expression matching it and its subaccounts,
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-- case insensitively.
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accountNameToAccountRegexCI :: AccountName -> Regexp
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accountNameToAccountRegexCI a = toRegexCI' $ "^" <> escapeName a <> "(:|$)" -- PARTIAL: Is this safe after escapeName?
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-- | Convert an account name to a regular expression matching it but not its subaccounts.
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accountNameToAccountOnlyRegex :: AccountName -> Regexp
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accountNameToAccountOnlyRegex a = toRegex' $ "^" <> escapeName a <> "$" -- PARTIAL: Is this safe after escapeName?
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-- | Convert an account name to a regular expression matching it but not its subaccounts,
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-- case insensitively.
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accountNameToAccountOnlyRegexCI :: AccountName -> Regexp
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accountNameToAccountOnlyRegexCI a = toRegexCI' $ "^" <> escapeName a <> "$" -- PARTIAL: Is this safe after escapeName?
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-- -- | Does this string look like an exact account-matching regular expression ?
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--isAccountRegex :: String -> Bool
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--isAccountRegex s = take 1 s == "^" && take 5 (reverse s) == ")$|:("
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type BeancountAccountName = AccountName
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type BeancountAccountNameComponent = AccountName
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-- Convert a hledger account name to a valid Beancount account name.
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-- It replaces non-supported characters with @-@ (warning: in extreme cases
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-- separate accounts could end up with the same name), and it capitalises
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-- each account name part. It also checks that the first part is one of
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-- Assets, Liabilities, Equity, Income, or Expenses, and if not it raises an error.
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-- Account aliases (eg --alias) should be used to set these required
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-- top-level account names if needed.
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accountNameToBeancount :: AccountName -> BeancountAccountName
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accountNameToBeancount a =
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-- https://beancount.github.io/docs/beancount_language_syntax.html#accounts
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accountNameFromComponents $
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case map (accountNameComponentToBeancount a) $ accountNameComponents a of
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c:_ | c `notElem` beancountTopLevelAccounts -> error' e
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where
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e = T.unpack $ T.unlines [
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beancountAccountErrorMessage a,
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"For Beancount output, all top-level accounts must be (or be aliased to) one of",
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T.intercalate ", " beancountTopLevelAccounts <> "."
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]
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cs -> cs
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accountNameComponentToBeancount :: AccountName -> AccountName -> BeancountAccountNameComponent
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accountNameComponentToBeancount acct part =
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case T.uncons part of
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Just (c,_) | not $ isLetter c -> error' e
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where
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e = unlines [
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T.unpack $ beancountAccountErrorMessage acct,
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"For Beancount output, each account name part must begin with a letter."
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]
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_ -> textCapitalise part'
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where part' = T.map (\c -> if isBeancountAccountChar c then c else '-') part
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beancountAccountErrorMessage :: AccountName -> Text
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beancountAccountErrorMessage a = "Could not convert \"" <> a <> "\" to a Beancount account name."
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isBeancountAccountChar :: Char -> Bool
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isBeancountAccountChar c = c `elem` ("-:"::[Char]) || isLetter c || isDigit c
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beancountTopLevelAccounts = ["Assets", "Liabilities", "Equity", "Income", "Expenses"]
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tests_AccountName = testGroup "AccountName" [
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testCase "accountNameTreeFrom" $ do
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accountNameTreeFrom ["a"] @?= Node "root" [Node "a" []]
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accountNameTreeFrom ["a","b"] @?= Node "root" [Node "a" [], Node "b" []]
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accountNameTreeFrom ["a","a:b"] @?= Node "root" [Node "a" [Node "a:b" []]]
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accountNameTreeFrom ["a:b:c"] @?= Node "root" [Node "a" [Node "a:b" [Node "a:b:c" []]]]
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,testCase "expandAccountNames" $ do
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expandAccountNames ["assets:cash","assets:checking","expenses:vacation"] @?=
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["assets","assets:cash","assets:checking","expenses","expenses:vacation"]
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,testCase "isAccountNamePrefixOf" $ do
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"assets" `isAccountNamePrefixOf` "assets" @?= False
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"assets" `isAccountNamePrefixOf` "assets:bank" @?= True
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"assets" `isAccountNamePrefixOf` "assets:bank:checking" @?= True
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"my assets" `isAccountNamePrefixOf` "assets:bank" @?= False
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,testCase "isSubAccountNameOf" $ do
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"assets" `isSubAccountNameOf` "assets" @?= False
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"assets:bank" `isSubAccountNameOf` "assets" @?= True
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"assets:bank:checking" `isSubAccountNameOf` "assets" @?= False
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"assets:bank" `isSubAccountNameOf` "my assets" @?= False
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,testCase "accountNameInferType" $ do
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accountNameInferType "assets" @?= Just Asset
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accountNameInferType "assets:cash" @?= Just Cash
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accountNameInferType "assets:A/R" @?= Just Asset
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accountNameInferType "liabilities" @?= Just Liability
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accountNameInferType "equity" @?= Just Equity
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accountNameInferType "equity:conversion" @?= Just Conversion
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accountNameInferType "expenses" @?= Just Expense
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accountNameInferType "revenues" @?= Just Revenue
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accountNameInferType "revenue" @?= Just Revenue
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accountNameInferType "income" @?= Just Revenue
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,testCase "joinAccountNames" $ do
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joinAccountNames "assets" "cash" @?= "assets:cash"
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joinAccountNames "assets:cash" "a" @?= "assets:cash:a"
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joinAccountNames "assets" "(cash)" @?= "(assets:cash)"
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joinAccountNames "assets" "[cash]" @?= "[assets:cash]"
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joinAccountNames "(assets)" "cash" @?= "(assets:cash)"
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joinAccountNames "" "assets" @?= "assets"
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joinAccountNames "assets" "" @?= "assets"
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,testCase "concatAccountNames" $ do
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concatAccountNames ["assets", "cash"] @?= "assets:cash"
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|
concatAccountNames ["assets:cash", "a"] @?= "assets:cash:a"
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|
concatAccountNames ["assets", "(cash)"] @?= "(assets:cash)"
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|
concatAccountNames ["assets", "[cash]"] @?= "[assets:cash]"
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|
concatAccountNames ["(assets)", "cash"] @?= "(assets:cash)"
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|
concatAccountNames ["", "assets"] @?= ":assets"
|
|
concatAccountNames ["assets", ""] @?= "assets:"
|
|
]
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