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#include "reconcile.h"
#include "walk.h"
namespace ledger {
#define xact_next(x) ((transaction_t *)transaction_xdata(*x).ptr)
#define xact_next_ptr(x) ((transaction_t **)&transaction_xdata(*x).ptr)
static bool search_for_balance(amount_t& amount,
transaction_t ** prev, transaction_t * next)
{
for (; next; next = xact_next(next)) {
transaction_t * temp = *prev;
*prev = next;
amount -= next->amount;
if (! amount ||
search_for_balance(amount, xact_next_ptr(next), xact_next(next)))
return true;
amount += next->amount;
*prev = temp;
}
return false;
}
void reconcile_transactions::push_to_handler(transaction_t * first)
{
for (; first; first = xact_next(first))
item_handler<transaction_t>::operator()(*first);
item_handler<transaction_t>::flush();
}
void reconcile_transactions::flush()
{
value_t cleared_balance;
value_t pending_balance;
transaction_t * first = NULL;
transaction_t ** last_ptr = &first;
for (transactions_list::iterator x = xacts.begin();
x != xacts.end();
x++) {
if (! is_valid(cutoff) || (*x)->date() < cutoff) {
switch ((*x)->state) {
case transaction_t::CLEARED:
cleared_balance += (*x)->amount;
break;
case transaction_t::UNCLEARED:
case transaction_t::PENDING:
pending_balance += (*x)->amount;
*last_ptr = *x;
last_ptr = xact_next_ptr(*x);
break;
}
}
}
if (cleared_balance.type() >= value_t::BALANCE)
throw new error("Cannot reconcile accounts with multiple commodities");
cleared_balance.cast(value_t::AMOUNT);
balance.cast(value_t::AMOUNT);
commodity_t& cb_comm = cleared_balance.as_amount_lval().commodity();
commodity_t& b_comm = balance.as_amount_lval().commodity();
balance -= cleared_balance;
if (balance.type() >= value_t::BALANCE)
throw new error(string("Reconcile balance is not of the same commodity ('") +
b_comm.symbol() + string("' != '") + cb_comm.symbol() + "')");
// If the amount to reconcile is the same as the pending balance,
// then assume an exact match and return the results right away.
amount_t& to_reconcile(balance.as_amount_lval());
pending_balance.cast(value_t::AMOUNT);
if (to_reconcile == pending_balance.as_amount_lval() ||
search_for_balance(to_reconcile, &first, first)) {
push_to_handler(first);
} else {
throw new error("Could not reconcile account!");
}
}
} // namespace ledger
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