<?php
// $Id$

/**
 * @file
 * Defines simple text field types.
 */

/**
 * Implementation of hook_field_info().
 */
function text_field_info() {
  return array(
    'text' => array('label' => 'Text'),
  );
}

/**
 * Implementation of hook_field_settings().
 */
function text_field_settings($op, $field) {
  switch ($op) {
    case 'form':
      $form = array();
      $options = array(0 => t('Plain text'), 1 => t('Filtered text (user selects input format)'));
      $form['text_processing'] = array(
        '#type' => 'radios',
        '#title' => t('Text processing'),
        '#default_value' => isset($field['text_processing']) ? $field['text_processing'] : 0,
        '#options' => $options,
      );
      $form['max_length'] = array(
        '#type' => 'textfield',
        '#title' => t('Maximum length'),
        '#default_value' => isset($field['max_length']) ? $field['max_length'] : '',
        '#required' => FALSE,
        '#description' => t('The maximum length of the field in characters. Leave blank for an unlimited size.'),
      );
      $form['allowed_values'] = array(
        '#type' => 'textarea',
        '#title' => t('Allowed values list'),
        '#default_value' => isset($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 'save':
      return array('text_processing', 'max_length', 'allowed_values', 'allowed_values_php');

    case 'database columns':
      $columns = array(
        'value' => array('type' => 'varchar', 'not null' => TRUE, 'default' => "''", 'sortable' => TRUE),
        'format' => array('type' => 'int', 'length' => 10, 'unsigned' => TRUE, 'not null' => TRUE, 'default' => 0),
      );
      if ($field['max_length'] == 0 || $field['max_length'] > 255) {
        $columns['value']['type'] = 'longtext';
      }
      else {
        $columns['value']['length'] = $field['max_length'];
      }
      if ($field['text_processing'] == 0) {
        unset($columns['format']);
      }
      return $columns;

    case 'arguments':
      $arguments = content_views_field_arguments($field);
      $alias = "content: $field[field_name]";
      $argument = array(
        'handler' => 'text_views_argument_handler',
        'option' => 'string',
        'help' => t('Set the option to the number of initial characters to filter by. Leave empty for full term; use 1 for an A/B/C style glossary.'),
      );
      $arguments[$alias] = array_merge($arguments[$alias], $argument);
      return $arguments;

    case 'filters':
      $allowed_values = text_allowed_values($field);
       if (count($allowed_values)) {
         return array(
           'default' => array(
            'list' => $allowed_values,
             'list-type' => 'list',
             'operator' => 'views_handler_operator_or',
             'value-type' => 'array',
            ),
          );
        }
      else {
        return array(
          'like' => array(
            'operator' => 'views_handler_operator_like',
            'handler' => 'views_handler_filter_like',
          ),
        );
      }
      break;
  }
}

function text_views_argument_handler($op, &$query, $argtype, $arg = '') {
  $name = explode(':', is_array($argtype) ? $argtype['type'] : $argtype);
  $field_name = trim($name[1]);
  $field      = content_fields($field_name);
  $db_info    = content_database_info($field);
  $value      = $db_info['columns']['value']['column'];
  $table      = 'node_data_'. $field['field_name'];

  switch($op) {
    case 'summary':
      $query->ensure_table($table);
      $query->add_field($value, $table);

      $length = intval($arg);
      $fieldinfo['field'] = $length <= 0 ? "$table.$value" : "LEFT($table.$value, $length)";
      $fieldinfo['fieldname'] = 'letter';
      return $fieldinfo;

    case 'sort':
      break;

    case 'filter':
      $query->ensure_table($table);
      $query->add_field($value, $table);

      $length = intval($argtype['options']);
      $where = $length <= 0 ? "$table.$value = '%s'" : "LEFT($table.$value, $length) = '%s'";
      $query->add_where($where, $arg);
      break;

    case 'link':
      return l(strtoupper($query->letter), "$arg/$query->letter");

    case 'title':
      return check_plain(strtoupper($query));
  }
}

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

      if (is_array($items)) {
        foreach ($items as $delta => $item) {
          $error_field = $field['field_name'] .']['. $delta .'][value';
          if ($item['value'] != '') {
            if (count($allowed_values) && !array_key_exists($item['value'], $allowed_values)) {
              form_set_error($error_field, t('Illegal value for %name.', array('%name' => t($field['widget']['label']))));
            }
          }
        }
      }
      if ($field['max_length'] > 0) {
        foreach ($items as $delta => $data) {
          $error_field = $field['field_name'] .']['. $delta .'][value';
          if (strlen($data['value']) > $field['max_length']) {
            form_set_error($error_field, t('%label is longer than %max characters.', array('%label' => $field['widget']['label'], '%max' => $field['max_length'])));
          }
        }
      }
      break;
  }
}

/**
 * Implementation of hook_field_formatter_info().
 */
function text_field_formatter_info() {
  return array(
    'default' => array(
      'label' => 'Default',
      'field types' => array('text'),
    ),
    'plain' => array(
      'label' => 'Plain text',
      'field types' => array('text'),
    ),
    'trimmed' => array(
      'label' => 'Trimmed',
      'field types' => array('text'),
    ),
  );
}

/**
 * Implementation of hook_field_formatter().
 *
 * The $node argument is necessary so that filter access can be checked on
 * node preview.
 */
function text_field_formatter($field, $item, $formatter, $node) {
  if (!isset($item['value'])) {
    return '';
  }

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

  switch ($formatter) {
    case 'plain':
      $text = strip_tags($item['value']);
      break;

    case 'trimmed':
      $text = node_teaser($item['value'], $field['text_processing'] ? $item['format'] : NULL);
      break;

    case 'default':
      $text = $item['value'];
  }

  if ($field['text_processing']) {
    return check_markup($text, $item['format'], is_null($node) || isset($node->in_preview));
  }
  else {
    return check_plain($text);
  }
}


/**
 * Implementation of hook_widget_info().
 */
function text_widget_info() {
  return array(
    'text' => array(
      'label' => 'Text Field',
      'field types' => array('text'),
    ),
  );
}

/**
 * Implementation of hook_widget_settings().
 */
function text_widget_settings($op, $widget) {
  switch ($op) {
    case 'form':
      $form = array();
      $form['rows'] = array(
        '#type' => 'textfield',
        '#title' => t('Rows'),
        '#default_value' => $widget['rows'] ? $widget['rows'] : 1,
        '#required' => TRUE,
      );
      return $form;

    case 'validate':
      if (!is_numeric($widget['rows']) || intval($widget['rows']) != $widget['rows'] || $widget['rows'] <= 0) {
        form_set_error('rows', t('"Rows" must be a positive integer.'));
      }
      break;

    case 'save':
      return array('rows');
  }
}

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

      $form[$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 $data) {
          if ($data['value']) {
            if ($field['widget']['rows'] == 1) {
              $form[$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,
                '#maxlength' => $field['max_length'] ? $field['max_length'] : NULL,
                '#weight' => $field['widget']['weight'],
              );
            }
            else {
              $form[$field['field_name']][$delta]['value'] = array(
                '#type' => 'textarea',
                '#title' => ($delta == 0) ? t($field['widget']['label']) : '',
                '#default_value' => $data['value'],
                '#required' => ($delta == 0) ? $field['required'] : FALSE,
                '#rows' => $field['widget']['rows'],
                '#weight' => $field['widget']['weight'],
              );
            }
            if ($field['text_processing']) {
              $form[$field['field_name']][$delta]['format'] = filter_form($data['format'], $form[$field['field_name']][$delta]['value']['#weight'] + 1, array($field['field_name'], $delta, 'format'));
            }
            $delta++;
          }
        }
        foreach (range($delta, $delta + 2) as $delta) {
          if ($field['widget']['rows'] == 1) {
            $form[$field['field_name']][$delta]['value'] = array(
              '#type' => 'textfield',
              '#title' => ($delta == 0) ? t($field['widget']['label']) : '',
              '#default_value' => '',
              '#required' => ($delta == 0) ? $field['required'] : FALSE,
              '#maxlength' => $field['max_length'] ? $field['max_length'] : NULL,
              '#weight' => $field['widget']['weight'],
            );
          }
          else {
            $form[$field['field_name']][$delta]['value'] = array(
              '#type' => 'textarea',
              '#title' => ($delta == 0) ? t($field['widget']['label']) : '',
              '#default_value' => '',
              '#required' => ($delta == 0) ? $field['required'] : FALSE,
              '#rows' => $field['widget']['rows'],
              '#weight' => $field['widget']['weight'],
            );
          }
          if ($field['text_processing']) {
            $form[$field['field_name']][$delta]['format'] = filter_form($items[$delta]['format'], $form[$field['field_name']][$delta]['value']['#weight'] + 1, array($field['field_name'], $delta, 'format'));
          }
        }
      }
      else {
        if ($field['widget']['rows'] == 1) {
          $form[$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']),
            '#maxlength' => $field['max_length'] ? $field['max_length'] : NULL,
            '#weight' => $field['widget']['weight'],
          );
        }
        else {
          $form[$field['field_name']][0]['value'] = array(
            '#type' => 'textarea',
            '#title' => t($field['widget']['label']),
            '#default_value' => $items[0]['value'],
            '#required' => $field['required'],
            '#rows' => $field['widget']['rows'],
            '#description' => t($field['widget']['description']),
            '#weight' => $field['widget']['weight'],
          );
        }
        if ($field['text_processing']) {
          $form[$field['field_name']][0]['format'] = filter_form($items[0]['format'], $form[$field['field_name']][0]['value']['#weight'] + 1, array($field['field_name'], 0, 'format'));
        }
      }
      return $form;

    case 'process form values':
      // Don't save empty fields except the first value
      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 text_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']];
}