<?php

class LedgerEntriesController extends AppController {

  
  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * action: index / current / past / all
   *  - Creates a list of ledger entries
   */

  function index()   { $this->gridView('All Ledger Entries'); }


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * virtuals: gridData
   *  - With the application controller handling the gridData action,
   *    these virtual functions ensure that the correct data is passed
   *    to jqGrid.
   */

  function gridDataTables(&$params, &$model) {
    $link =
      array(// Models
	    'Transaction' =>
	    array('fields' => array('id', 'stamp'),
		  ),

	    'Ledger' =>
	    array('fields' => array('id', 'sequence'),
		  'Account' => 
		  array('fields' => array('id', 'name', 'type'),
			),
		  ),

	    'Tender' =>
	    array('fields' => array('id', 'name', 'nsf_transaction_id'),
		  ),

/* 	    'DebitEntry', */
/* 	    'CreditEntry', */
	    );

    return array('link' => $link);
  }

  function gridDataFields(&$params, &$model) {
    $fields = parent::gridDataFields($params, $model);
    return array_merge($fields,
		       $this->LedgerEntry->debitCreditFields());
  }

  function gridDataFilterTablesTable(&$params, &$model, $table) {
    $table = $this->gridDataFilterTableName($params, $model, $table);
    // Account is already part of our standard table set.
    // Ensure we don't add it in again as part of filtering.
    if ($table == 'Account')
      return null;

    // Customer needs to be added beneath Transaction
    if ($table == 'Customer')
      return 'Transaction';

    return $table;
  }

  function gridDataFilterTablesConfig(&$params, &$model, $table) {
    $config = parent::gridDataFilterTablesConfig($params, $model, $table);

    // Customer is special in that its linked in by Transaction
    // Therefore, the actual table used for the join is 'Transaction',
    // not 'Customer', and so we need to specify Customer here.
    if ($table == 'Customer')
      $config = array('Customer' => $config);

    return $config;
  }

  function gridDataFilterConditionsStatement(&$params, &$model, $table, $key, $value) {
    //pr(compact('table', 'key', 'value'));
    if ($table == 'Account' && $value['value_present'] && $value['value'] === '-AR-')
      $value = $this->LedgerEntry->Ledger->Account->accountReceivableAccountID();
    return parent::gridDataFilterConditionsStatement($params, $model, $table, $key, $value);
  }


  function gridDataOrder(&$params, &$model, $index, $direction) {
/*     if ($index === 'balance') */
/*       return ($index .' '. $direction); */
    $order = parent::gridDataOrder($params, $model, $index, $direction);

    if ($index === 'Transaction.stamp') {
      $order[] = 'LedgerEntry.id ' . $direction;
    }

    return $order;
  }

  function gridDataPostProcessCalculatedFields(&$params, &$model, &$records) {
    parent::gridDataPostProcessCalculatedFields($params, $model, $records);
    foreach ($records AS &$record) {
      // REVISIT <AP>: 20090730
      //  We really need the grid to handle this.  We probably need to
      //  either create a hidden column with the nsf id, or pass back
      //  a list of nsf items as user data.  We can then add an onload
      //  function to sweep through the nsf items and format them.
      //  For now... this works.
      if (!empty($record['Tender']['nsf_transaction_id']))
	$record['Tender']['name'] =
	  '<SPAN class="nsf-tender">' . $record['Tender']['name'] . '</SPAN>';
    }
  }

  function gridDataPostProcessLinks(&$params, &$model, &$records, $links) {
    $links['LedgerEntry']    = array('id');
    $links['Transaction']    = array('id');
    // REVISIT <AP>: 20090827
    //  Need to take 'level' into account
    if ($this->Permission->allow('controller.accounts')) {
      $links['Ledger']         = array('id');
      $links['Account']        = array('name');
    }
    $links['Tender']         = array('name');
    return parent::gridDataPostProcessLinks($params, $model, $records, $links);
  }


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * action: view
   *  - Displays information about a specific entry
   */

  function view($id = null) {
    $entry = $this->LedgerEntry->find
      ('first',
       array('contain' => array
	     (
	      'Transaction' =>
	      array('fields' => array('id', 'stamp'),
		    ),

	      'Ledger' =>
	      array('fields' => array('id', 'sequence', 'name'),
		    'Account' => 
		    array('fields' => array('id', 'name', 'type'),
			  ),
		    ),

	      'Tender' =>
	      array('fields' => array('id', 'name'),
		    ),

	      'DebitDoubleEntry' => array('id'),
	      'CreditDoubleEntry' => array('id'),

	      'DebitEntry'  => array('fields' => array('id', 'crdr')),
	      'CreditEntry' => array('fields' => array('id', 'crdr')),
	      ),

	     'conditions' => array('LedgerEntry.id' => $id),
	     ));

    if (empty($entry) || empty($entry['Ledger']['Account'])) {
      $this->Session->setFlash(__('Invalid Item.', true));
      $this->redirect(array('controller' => 'accounts', 'action'=>'index'));
    }

    if (!empty($entry['DebitEntry']) && !empty($entry['CreditEntry']))
      die("LedgerEntry has both a matching DebitEntry and CreditEntry");
    if (empty($entry['DebitEntry']) && empty($entry['CreditEntry']))
      die("LedgerEntry has neither a matching DebitEntry nor a CreditEntry");
    if (empty($entry['DebitEntry']) && count($entry['CreditEntry']) != 1)
      die("LedgerEntry has more than one CreditEntry");
    if (empty($entry['CreditEntry']) && count($entry['DebitEntry']) != 1)
      die("LedgerEntry has more than one DebitEntry");

    if (empty($entry['DebitEntry']))
      $entry['MatchingEntry'] = $entry['CreditEntry'][0];
    else
      $entry['MatchingEntry'] = $entry['DebitEntry'][0];

    if (empty($entry['DebitDoubleEntry']['id']))
      $entry['DoubleEntry'] = $entry['CreditDoubleEntry'];
    else
      $entry['DoubleEntry'] = $entry['DebitDoubleEntry'];

    // REVISIT <AP>: 20090816
    //  This page doesn't seem very useful, let's just keep it
    //  all to the double entry view.
    $this->redirect(array('controller' => 'double_entries',
			  'action' => 'view',
			  $entry['DoubleEntry']['id']));

    // Prepare to render.
    $title = "Ledger Entry #{$entry['LedgerEntry']['id']}";
    $this->set(compact('entry', 'title'));
  }

}