<?php
class Transaction extends AppModel {

	var $name = 'Transaction';
/* 	var $validate = array( */
/* 		'stamp' => array('date') */
/* 	); */

	var $belongsTo = array(
		'Customer',
	);

	var $hasMany = array(
		'LedgerEntry',
	);

	var $hasAndBelongsToMany = array(
		'ReconciledLedgerEntry' => array(
			'className' => 'LedgerEntry',
			'joinTable' => 'reconciliations',
			'foreignKey' => 'ledger_entry_id',
			'associationForeignKey' => 'transaction_id',
		),
	);

	function beforeSave() {
    
		if(!empty($this->data['Transaction']['stamp'])) {
			$this->data['Transaction']['stamp'] =
				$this->dateFormatBeforeSave($this->data['Transaction']['stamp']);
		}
		return true;
	}

  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * function: findReconciledLedgerEntries
   *  - Returns ledger entries that are reconciled by the given
   *    transaction (such as charges reconciled by a receipt)
   */

  function findReconciledLedgerEntries($id = null) {
    $reconciled['LedgerEntry'] = $this->find
      ('all', array
       ('link' => array
	('ReconciledLedgerEntry' => array
	 ('fields' => array
	  ('id',
	   "COALESCE(SUM(Reconciliation.amount),0) AS 'reconciled'",
	   "ReconciledLedgerEntry.amount - COALESCE(SUM(Reconciliation.amount),0) AS 'balance'",
	   ),
	  ),
	 ),
	'group' => ('ReconciledLedgerEntry.id'),
	'conditions' => array('Transaction.id' => $id),
	'fields' => array(),
	));
    //pr($reconciled);
    $balance = 0;
    foreach ($reconciled['LedgerEntry'] AS &$entry) {
      $entry = array_merge($entry["ReconciledLedgerEntry"], $entry[0]);
      $balance += $entry['balance'];
    }
    $reconciled['balance'] = $balance;

  return $reconciled;
  }

}
?>