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#include "reconcile.h"
#include "walk.h"
namespace ledger {
#define xact_next(x) reinterpret_cast<xact_t *>(xact_xdata(*x).ptr)
#define xact_next_ptr(x) reinterpret_cast<xact_t **>(&xact_xdata(*x).ptr)
static bool search_for_balance(amount_t& amount,
xact_t ** prev, xact_t * next)
{
for (; next; next = xact_next(next)) {
xact_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_xacts::push_to_handler(xact_t * first)
{
for (; first; first = xact_next(first))
item_handler<xact_t>::operator()(*first);
item_handler<xact_t>::flush();
}
void reconcile_xacts::flush()
{
value_t cleared_balance;
value_t pending_balance;
xact_t * first = NULL;
xact_t ** last_ptr = &first;
foreach (xact_t * xact, xacts) {
if (! is_valid(cutoff) || xact->date() < cutoff) {
switch (xact->state) {
case xact_t::CLEARED:
cleared_balance += xact->amount;
break;
case xact_t::UNCLEARED:
case xact_t::PENDING:
pending_balance += xact->amount;
*last_ptr = xact;
last_ptr = xact_next_ptr(xact);
break;
}
}
}
if (cleared_balance.type() >= value_t::BALANCE)
throw std::runtime_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().commodity();
commodity_t& b_comm = balance.as_amount().commodity();
balance -= cleared_balance;
if (balance.type() >= value_t::BALANCE)
throw_(std::runtime_error,
"Reconcile balance is not of the same commodity ('"
<< b_comm.symbol() << "' != '" << 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() ||
search_for_balance(to_reconcile, &first, first)) {
push_to_handler(first);
} else {
throw std::runtime_error("Could not reconcile account!");
}
}
} // namespace ledger
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