<?php
// $Id$

/**
 * @file
 * Defines numeric field types.
 */

/**
 * Implementation of hook_field_info().
 */
function number_field_info() {
  return array(
    'number_integer' => array('label' => t('Integer')),
    'number_decimal' => array('label' => t('Decimal')),
  );
}

/**
 * Implementation of hook_field_settings().
 */
function number_field_settings($op, $field) {
  switch ($op) {
    case 'form':
      $form = array();
      foreach (number_field_formatter_info() as $format => $opt) {
        if (in_array($field['type'], $opt['field types'])) {
          $options[$format] = $opt['label'];
        }
      }
      $form['min'] = array(
        '#type' => 'textfield',
        '#title' => t('Minimum'),
        '#default_value' => isset($field['min']) ? $field['min'] : '',
      );
      $form['max'] = array(
        '#type' => 'textfield',
        '#title' => t('Maximum'),
        '#default_value' => isset($field['max']) ? $field['max'] : '',
      );
      $form['append']['prefix'] = array(
        '#type' => 'textfield',
        '#title' => t('Prefix'),
        '#size' => 60,
        '#default_value' => isset($field['prefix']) ? $field['prefix'] : '',
        '#description' => t('Define a string that should be prefixed to the value, like $ or €. Leave blank for none. Separate singular and plural values with a pipe (pound|pounds).'),
      );
      $form['append']['suffix'] = array(
        '#type' => 'textfield',
        '#title' => t('Suffix'),
        '#size' => 60,
        '#default_value' => isset($field['suffix']) ? $field['suffix'] : '',
        '#description' => t('Define a string that should suffixed to the value, like m², m/s², kb/s. Leave blank for none. Separate singular and plural values with a pipe (pound|pounds). '),
      );
      $form['allowed_values'] = array(
        '#type' => 'textarea',
        '#title' => t('Allowed values list'),
        '#default_value' => isset($field['allowed_values']) ? $field['allowed_values'] : '',
        '#required' => FALSE,
        '#rows' => 10,
        '#description' => t('The possible values this field can contain. Enter one value per line, in the format key|label. The key is the value that will be stored in the database and it must match the field storage type, %type. The label is optional and the key will be used as the label if no label is specified.', array('%type' => $field['type'])),
      );
      $form['advanced_options'] = array(
        '#type' => 'fieldset',
        '#title' => t('PHP code'),
        '#collapsible' => TRUE,
        '#collapsed' => TRUE,
      );
      $form['advanced_options']['allowed_values_php'] = array(
        '#type' => 'textarea',
        '#title' => t('Code'),
        '#default_value' => $field['allowed_values_php'],
        '#rows' => 6,
        '#description' => t('Advanced Usage Only: PHP code that returns a keyed array of allowed values. Should not include &lt;?php ?&gt; delimiters. If this field is filled out, the array returned by this code will override the allowed values list above.'),
      );
      return $form;

    case 'validate':
      if ($field['min'] && !is_numeric($field['min'])) {
        form_set_error('min', t('"Minimum" must be a number.'));
      }
      if ($field['max'] && !is_numeric($field['max'])) {
        form_set_error('max', t('"Maximum" must be a number.'));
      }
      break;

    case 'save':
      return array('prefix', 'suffix', 'append_position', 'min', 'max', 'allowed_values', 'allowed_values_php');

    case 'database columns':
      if ($field['type'] == 'number_integer') {
        return array(
          'value' => array('type' => 'int', 'not null' => FALSE, 'default' => NULL, 'sortable' => TRUE),
        );
      }
      if ($field['type'] == 'number_decimal') {
        return array(
          'value' => array('type' => 'float', 'not null' => FALSE, 'default' => NULL, 'sortable' => TRUE),
        );
      }

    case 'filters':
      $allowed_values = number_allowed_values($field);
      if (count($allowed_values)) {
        return array(
          'default' => array(
            'list' => $allowed_values,
            'list-type' => 'list',
            'operator' => 'views_handler_operator_andor',
            'value-type' => 'array',
          ),
        );
      }
      else {
        return array(
          'default' => array(
            'operator' => 'views_handler_operator_gtlt',
          ),
        );
      }
      break;
  }
}

/**
 * Implementation of hook_field().
 */
function number_field($op, &$node, $field, &$items, $teaser, $page) {
  switch ($op) {
    case 'validate':
      $allowed_values = number_allowed_values($field);

      if (is_array($items)) {
        foreach ($items as $delta => $item) {
          $error_field = $field['field_name'] .']['. $delta .'][value';
          if ($item['value'] != '') {
            if (is_numeric($field['min']) && $item['value'] < $field['min']) {
              form_set_error($error_field, t('The value of %name may be no smaller than %min.', array('%name' => t($field['widget']['label']), '%min' => $field['min'])));
            }
            if (is_numeric($field['max']) && $item['value'] > $field['max']) {
              form_set_error($error_field, t('The value of %name may be no larger than %max.', array('%name' => t($field['widget']['label']), '%max' => $field['max'])));
            }
            if (count($allowed_values) && !array_key_exists($item['value'], $allowed_values)) {
              form_set_error($error_field, t('Illegal value for %name.', array('%name' => t($field['widget']['label']))));
            }
          }
        }
      }
      break;
  }
}

/**
 * Implementation of hook_field_formatter_info().
 */
function number_field_formatter_info() {

  return array(
    'default' => array('label' => '9999',               'field types' => array('number_integer', 'number_decimal')),
    'us_0'    => array('label' => '9,999',              'field types' => array('number_integer', 'number_decimal')),
    'us_1'    => array('label' => '9,999.9',            'field types' => array('number_decimal')),
    'us_2'    => array('label' => '9,999.99',           'field types' => array('number_decimal')),
    'be_0'    => array('label' => '9.999',              'field types' => array('number_integer', 'number_decimal')),
    'be_1'    => array('label' => '9.999,9',            'field types' => array('number_decimal')),
    'be_2'    => array('label' => '9.999,99',           'field types' => array('number_decimal')),
    'fr_0'    => array('label' => '9 999',              'field types' => array('number_integer', 'number_decimal')),
    'fr_1'    => array('label' => '9 999, 9',           'field types' => array('number_decimal')),
    'fr_2'    => array('label' => '9 999, 99',          'field types' => array('number_decimal')),
    'unformatted' => array('label' => t('unformatted'), 'field types' => array('number_integer', 'number_decimal')),
  );
}

/**
 * Implementation of hook_field_formatter().
 */
function number_field_formatter($field, $item, $formatter, $node) {
  // If the value is empty, we have $item['value'] = NULL
  if (is_null($item['value'])) {
    return '';
  }

  $item['value'] = check_plain($item['value']);

  if ($formatter == 'unformatted') {
    return $item['value'];
  }

  if ($allowed_values = number_allowed_values($field)) {
    if ($allowed_values[$item['value']] != $item['value']) {
      return $allowed_values[$item['value']];
    }
  }

  switch ($formatter) {
  case 'us_0':
    $value = number_format($item['value'], 0, '.', ',');
    break;
  case 'us_1':
    $value = number_format($item['value'], 1, '.', ',');
    break;
  case 'us_2':
    $value = number_format($item['value'], 2, '.', ',');
    break;
  case 'be_0':
    $value = number_format($item['value'], 0, ',', '.');
    break;
  case 'be_1':
    $value = number_format($item['value'], 1, ',', '.');
    break;
  case 'be_2':
    $value = number_format($item['value'], 2, ',', '.');
    break;
  case 'fr_0':
    $value = number_format($item['value'], 0, ', ', ' ');
    break;
  case 'fr_1':
    $value = number_format($item['value'], 1, ', ', ' ');
    break;
  case 'fr_2':
    $value = number_format($item['value'], 2, ', ', ' ');
    break;
  default:
    $value = ($item['value']);
    break;
  }
  $prefixes = explode('|', $field['prefix']);
  $suffixes = explode('|', $field['suffix']);
  if ($prefixes) {
    if (sizeof($prefixes) > 1) {
      $prefix = format_plural($item['value'], $prefixes[0], $prefixes[1]);
    }
    else {
      $prefix = $field['prefix'];
    }
  }
  if ($suffixes) {
    if (sizeof($suffixes) > 1) {
      $suffix = format_plural($item['value'], $suffixes[0], $suffixes[1]);
    }
    else {
      $suffix = $field['suffix'];
    }
  }
  return $prefix . $value . $suffix;

}

/**
 * Implementation of hook_widget_info().
 */
function number_widget_info() {
  return array(
    'number' => array(
      'label' => t('Text Field'),
      'field types' => array('number_integer', 'number_decimal'),
    ),
  );
}

/**
 * Implementation of hook_widget().
 */
function number_widget($op, &$node, $field, &$items) {
  switch ($op) {
    case 'form':
      $form = array();

      $prefixes = explode('|', $field['prefix']);
      $suffixes = explode('|', $field['suffix']);
      // We take the plural form (if any) for forms.
      $prefix = array_pop($prefixes);
      $suffix = array_pop($suffixes);

      $form[$field['field_name']] = array('#tree' => TRUE);

      if ($field['multiple']) {
        $form[$field['field_name']]['#type'] = 'fieldset';
        $form[$field['field_name']]['#description'] = t($field['widget']['description']);
        $delta = 0;
        foreach ($items as $data) {
          if (isset($data['value'])) {
            $form[$field['field_name']][$delta]['value'] = array(
              '#type' => 'textfield',
              '#title' => ($delta == 0) ? t($field['widget']['label']) : '',
              '#default_value' => $data['value'],
              '#required' => ($delta == 0) ? $field['required'] : FALSE,
              '#size' => 20,
              '#maxlength' => 11,
              '#attributes' => array('class' => 'number'),
              '#field_prefix' => $prefix,
              '#field_suffix' => $suffix,
            );
            $delta++;
          }
        }
        foreach (range($delta, $delta + 2) as $delta) {
          $form[$field['field_name']][$delta]['value'] = array(
            '#type' => 'textfield',
            '#title' => ($delta == 0) ? t($field['widget']['label']) : '',
            '#default_value' => '',
            '#required' => ($delta == 0) ? $field['required'] : FALSE,
            '#size' => 20,
            '#maxlength' => 11,
            '#attributes' => array('class' => 'number'),
            '#field_prefix' => $prefix,
            '#field_suffix' => $suffix,
          );
        }
      }
      else {
        $form[$field['field_name']][0]['value'] = array(
          '#type' => 'textfield',
          '#title' => t($field['widget']['label']),
          '#default_value' => isset($items[0]['value']) ? $items[0]['value'] : '',
          '#required' => $field['required'],
          '#description' => t($field['widget']['description']),
          '#size' => 20,
          '#maxlength' => 11,
          '#attributes' => array('class' => 'number'),
          '#field_prefix' => $prefix,
          '#field_suffix' => $suffix,
        );
      }
      return $form;

    case 'process form values':
      // Don't save empty fields.
      foreach ($items as $delta => $item) {
        $items[$delta]['value'] = preg_replace('@[^-0-9\.]@', '', $items[$delta]['value']);
      }
      if ($field['multiple']) {
        foreach ($items as $delta => $item) {
          if ($item['value'] == '' && $delta > 0) {
            unset($items[$delta]);
          }
        }
      }
      break;
  }
}

/**
 *  Create an array of the allowed values for this field
 */
function number_allowed_values($field) {
  static $allowed_values;

  if ($allowed_values[$field['field_name']]) {
    return $allowed_values[$field['field_name']];
  }

  $allowed_values[$field['field_name']] = array();
  if ($field['allowed_values_php']) {
    ob_start();
    $result = eval($field['allowed_values_php']);
    if (is_array($result)) {
      $allowed_values[$field['field_name']] = $result;
    }
    ob_end_clean();
  }
  if (!$allowed_values[$field['field_name']]) {

    $list = explode("\n", $field['allowed_values']);
    $list = array_map('trim', $list);
    $list = array_filter($list, 'strlen');
    foreach ($list as $opt) {
      list($key, $value) = explode('|', $opt);
      $allowed_values[$field['field_name']][$key] = $value ? $value : $key;
    }
  }
  return $allowed_values[$field['field_name']];
}