<?php
/**
 * @file
 * Main file for the Photobox module.
 */

/**
 * Implements hook_field_formatter_info().
 */
function photobox_field_formatter_info() {
  $formatters = array(
    'photobox' => array(
      'label'       => t('Photobox'),
      //'field types' => array('image', 'imagefield_crop', 'media', 'field_collection'),
      'field types' => array('image'),
      'settings'    => array(
        'photobox_content_image_style' => '',
        'photobox_image_style'         => '',
        'photobox_gallery'             => 'post',
        'photobox_loop'                => 1,
        'photobox_thumbs'              => 1,
        'photobox_counter'             => 1,
        'photobox_hide_flash'          => 1,
        'photobox_keys_close'          => '27, 88, 67',
        'photobox_keys_prev'           => '37, 80',
        'photobox_keys_next'           => '39, 78',
      ),
    ),
  );
  return $formatters;
}

/**
 * Implements hook_field_formatter_settings_form().
 */
function photobox_field_formatter_settings_form($field, $instance, $view_mode, $form, &$form_state) {
  $display = $instance['display'][$view_mode];
  $settings = $display['settings'];

  $options = image_style_options(FALSE);
  $element['photobox_content_image_style'] = array(
    '#title'          => t('Content image style'),
    '#type'           => 'select',
    '#default_value'  => $settings['photobox_content_image_style'],
    '#empty_option'   => t('None (original image)'),
    '#options'        => $options,
  );
  $element['photobox_image_style'] = array(
    '#title'          => t('Photobox image style'),
    '#type'           => 'select',
    '#default_value'  => $settings['photobox_image_style'],
    '#empty_option'   => t('None (original image)'),
    '#options'        => $options,
  );
  
  return $element;
}

/**
 * Implements hook_field_formatter_settings_summary().
 */
function photobox_field_formatter_settings_summary($field, $instance, $view_mode) {
  $display = $instance['display'][$view_mode];
  $settings = $display['settings'];

  $summary = array();

  $image_styles = image_style_options(FALSE);
  // Unset possible 'No defined styles' option.
  unset($image_styles['']);
  // Styles could be lost because of enabled/disabled modules that defines
  // their styles in code.
  if (isset($image_styles[$settings['photobox_content_image_style']])) {
    $summary[] = t('Content image style: @style', array('@style' => $image_styles[$settings['photobox_content_image_style']]));
  }
  else {
    $summary[] = t('Content image style: @style', array('@style' => t('Original image')));
  }
  if (isset($image_styles[$settings['photobox_image_style']])) {
    $summary[] = t('Photobox image style: @style', array('@style' => $image_styles[$settings['photobox_image_style']]));
  }
  else {
    $summary[] = t('Photobox image style: @style', array('@style' => t('Original image')));
  }
  
  return implode('<br />', $summary);
}

/**
 * Implements hook_field_formatter_view().
 */
function photobox_field_formatter_view($entity_type, $entity, $field, $instance, $langcode, $items, $display) {
  drupal_add_library('photobox', 'photobox');
  $element = array();

  foreach ($items as $delta => $item) {
    $element[$delta] = array(
      '#theme' => 'photobox_image_formatter',
      '#item' => $item,
      '#entity_type' => $entity_type,
      '#entity' => $entity,
      '#field' => $field,
      '#display_settings' => $display['settings'],
    );
  }

  return $element;
}

/**
 * Implements hook_theme().
 */
function photobox_theme() {
  return array(
    'photobox_image_formatter' => array(
      'variables' => array(
        'item' => NULL,
        'entity_type' => NULL,
        'entity' => NULL,
        'field' => array(),
        'display_settings' => array(),
      ),
      'file' => 'photobox.theme.inc',
    ),
    'photobox_imagefield' => array(
      'variables' => array(
        'image' => array(),
        'path' => NULL,
        'title' => NULL,
        'gid' => NULL,
      ),
      'file' => 'photobox.theme.inc',
    ),
  );
}

/**
 * Implements hook_library().
 */
function photobox_library() {
  $libraries['photobox'] = array(
    'title' => 'Photobox',
    'website' => 'http://dropthebit.com/500/photobox-css3-image-gallery-jquery-plugin/',
    'version' => _photobox_library_version(),
    'js' => array(
      _photobox_library_path_js() => array(),
      drupal_get_path('module', 'photobox') . '/photobox.js' => array(),
      array(
        'type' => 'setting',
        'data' => array(
          'photobox' => array(),
        ),
      ),
    ),
    'css' => array(
      _photobox_library_path() . '/photobox.css' => array('type' => 'file'),
      //drupal_get_path('module', 'photobox') . '/photobox.css' => array('type' => 'file'),
    ),
  );

  return $libraries;
}

/**
 * Returns the path to the Photobox library.
 */
function _photobox_library_path() {
  $library_path = &drupal_static(__FUNCTION__, NULL);
  
  if (is_null($library_path)) {
    $library_path = variable_get('photobox_library_path', module_exists('libraries') ? libraries_get_path('photobox') : 'sites/all/libraries/photobox');
    if (file_exists($library_path . '/photobox.js') || file_exists($library_path . '/photobox.min.js')) {
    }
    elseif (file_exists($library_path . '/photobox/photobox.js') || file_exists($library_path . '/photobox/photobox.min.js')) {
      $library_path .= '/photobox';
    }
    else {
      watchdog('photobox', 'Photobox library is missing.', array(), WATCHDOG_ERROR);
      $library_path = FALSE;
    }
  }
  
  return $library_path;
}

/**
 * Returns the path to the Photobox library js file.
 */
function _photobox_library_path_js() {
  $library_path_js = &drupal_static(__FUNCTION__, NULL);
  
  if (is_null($library_path_js) && $library_path = _photobox_library_path()) {
    if (file_exists($library_path . '/photobox.min.js')) {
      $library_path_js = $library_path . '/photobox.min.js';
    }
    elseif (file_exists($library_path . '/photobox.js')) {
      $library_path_js = $library_path . '/photobox.js';
    }
  }
  
  return $library_path_js;
}

/**
 * Returns version of the Photobox library.
 */
function _photobox_library_version() {
  $version = &drupal_static(__FUNCTION__, NULL);
  
  if (is_null($version) && $library_path = _photobox_library_path()) {
    $pattern = '/photobox v([0-9\.a-z]+)/';
    $photobox_js = file_get_contents(_photobox_library_path_js(), NULL, NULL, 0, 32);
    if (preg_match($pattern, $photobox_js, $matches)) {
      $version = $matches[1];
    }
    else {
      $version = 'Unknown';
    }
  }
  
  return $version;
}