hledger-lib-0.19.1: Core data types, parsers and utilities for the hledger accounting tool.

Safe HaskellNone




A Transaction represents a movement of some commodity(ies) between two or more accounts. It consists of multiple account Postings which balance to zero, a date, and optional extras like description, cleared status, and tags.



txnTieKnot :: Transaction -> TransactionSource

Ensure a transaction's postings refer back to it.


showAccountName :: Maybe Int -> PostingType -> AccountName -> StringSource

Show an account name, clipped to the given width if any, and appropriately bracketed/parenthesised for the given posting type.

isTransactionBalanced :: Maybe (Map String Commodity) -> Transaction -> BoolSource

Is this transaction balanced ? A balanced transaction's real (non-virtual) postings sum to 0, and any balanced virtual postings also sum to 0.

date operations

journalTransactionWithDate :: WhichDate -> Transaction -> TransactionSource

Once we no longer need both, set the main transaction date to either the actual or effective date. A bit hacky.


transactionPostingBalances :: Transaction -> (MixedAmount, MixedAmount, MixedAmount)Source

Get the sums of a transaction's real, virtual, and balanced virtual postings.

balanceTransaction :: Maybe (Map String Commodity) -> Transaction -> Either String TransactionSource

Ensure this transaction is balanced, possibly inferring a missing amount or conversion price, or return an error message.

Balancing is affected by commodity display precisions, so those may be provided.

We can infer a missing real amount when there are multiple real postings and exactly one of them is amountless (likewise for balanced virtual postings). Inferred amounts are converted to cost basis when possible.

We can infer a conversion price when all real amounts are specified and the sum of real postings' amounts is exactly two non-explicitly-priced amounts in different commodities (likewise for balanced virtual postings).


showTransaction :: Transaction -> StringSource

Show a journal transaction, formatted for the print command. ledger 2.x's standard format looks like this:

yyyymmdd[ *][ CODE] description.........          [  ; comment...............]
    account name 1.....................  ...$amount1[  ; comment...............]
    account name 2.....................  ..$-amount1[  ; comment...............]

pcodewidth    = no limit -- 10          -- mimicking ledger layout.
pdescwidth    = no limit -- 20          -- I don't remember what these mean,
pacctwidth    = 35 minimum, no maximum  -- they were important at the time.
pamtwidth     = 11
pcommentwidth = no limit -- 22