<?php

/**
 * Implementation of hook_views_api().
 */
function views_rss_views_api() {
  return array(
    'api' => 2,
    'path' => drupal_get_path('module', 'views_rss') . '/views',
  );
}

/**
 * Implementation of hook_field_formatter_info().
 */
function views_rss_field_formatter_info() {
  $formatters = array(
    // Generic image formatter for <enclosure> element.
    'views_rss_enclosure_image' => array(
      'label' => t('RSS enclosure element: image: original size'),
      'field types' => array('image', 'filefield'),
    ),
    // Generic file formatter for <enclosure> element.
    'views_rss_enclosure_file' => array(
      'label' => t('RSS enclosure element: file'),
      'field types' => array('filefield'),
    ),
  );
  // Additional formatters for imagecache module.
  if (module_exists('imagecache')) {
    foreach (imagecache_presets() as $preset) {
      // Imagecache image formatter for <enclosure> element.
      $formatters['views_rss_enclosure_image' . $preset['presetname']] = array(
        'label' => t('RSS enclosure element: image: @preset', array('@preset' => $preset['presetname'])),
        'field types' => array('image', 'filefield'),
      );
    }
  }
  return $formatters;
}

/**
 * Implementation of hook_theme().
 */
function views_rss_theme() {
  $path = drupal_get_path('module', 'views_rss');
  $theme = array(
    'views_rss_fields_item' => array(
      'arguments' => array('item' => array()),
      'file' => 'views_rss_views_fields.theme.inc',
      'template' => 'views-rss-fields-item',
      'path' => "$path/views",
    ),
    'views_rss_feed_icon' => array(
      'arguments' => array('url', 'title', 'icon'),
      'file' => 'views_rss_views_fields.theme.inc',
      'path' => "$path/views",
    ),
    'views_rss_feed_description' => array(
      'arguments' => array('description', 'view'),
      'file' => 'views_rss_views_fields.theme.inc',
      'path' => "$path/views",
    ),
    // CCK field formatters.
    'views_rss_formatter_views_rss_enclosure_image' => array(
      'arguments' => array('element' => NULL),
      'function' => 'theme_views_rss_formatter_enclosure_image',
    ),
    'views_rss_formatter_views_rss_enclosure_file' => array(
      'arguments' => array('element' => NULL),
      'function' => 'theme_views_rss_formatter_enclosure_file',
    ),
  );
  if (module_exists('imagecache')) {
    foreach (imagecache_presets() as $preset) {
      $theme['views_rss_formatter_views_rss_enclosure_image' . $preset['presetname']] = array(
        'arguments' => array('element' => NULL),
        'function' => 'theme_views_rss_formatter_enclosure_image',
      );
    }
  }
  return $theme;
}


/**
 * Generic formatter for 'filefield' CCK fields
 * added to RSS <enclosure> element.
 */
function theme_views_rss_formatter_enclosure_file($element) {
  // Inside a view $element may contain NULL data. In that case, just return.
  if (empty($element['#item']['fid'])) {
    return;
  }
  // Return formatted XML element.
  return strtr('<enclosure url="!url" length="!length" type="!type" />', array(
    '!url'    => url($element['#item']['filepath'], array('absolute' => TRUE)),
    '!length' => $element['#item']['filesize'],
    '!type'   => $element['#item']['filemime'],
  ));
}

/**
 * Formatter for 'image' and 'filefield' CCK fields containing images
 * added to RSS <enclosure> element. Besides default image size
 * also provides option to use imagecache'd images.
 */
function theme_views_rss_formatter_enclosure_image($element) {
  // Inside a view $element may contain NULL data. In that case, just return.
  if (empty($element['#item']['fid'])) {
    return;
  }
  // Generate simple array of imagecache presets.
  $presets = array();
  foreach (imagecache_presets() as $preset) {
    $presets[] = $preset['presetname'];
  }
  // Get full image URL based on provided imagecache preset.
  $preset_name = str_replace('views_rss_enclosure_image', '', $element['#formatter']);
  if ($preset_name && in_array($preset_name, array_keys($presets))) {
    $path = imagecache_create_url($preset_name, $element['#item']['filepath']);
  }
  else {
    $path = $element['#item']['filepath'];
  }
  // Return formatted XML element.
  return strtr('<enclosure url="!url" length="!length" type="!type" />', array(
    '!url'    => url($path, array('absolute' => TRUE)),
    '!length' => $element['#item']['filesize'],
    '!type'   => $element['#item']['filemime'],
  ));
}