<?php

/**
 * @file
 * Provides HTML5 video and audio elements using Mediaelement.js for HTML4 browsers.
 */
/**
 * Render audio and video with MediaElement.
 *
 * @param mixed $file
 * Either a string with a path to a file or an array of paths to files.
 * @param array $options
 * - id: Optionally set the unique ID. Otherwise the MediaElement module
 * creates a unique one using a static count variable.
 * - width: Width of the player in pixels or percentage.
 * - height: Height of the player in pixels or percentage.
 * - opts: MediaElement.js API options.
 * - attributes: Override defaults for theme_mediaelement_link_audio().
 * - settings: Override defaults for theme_mediaelement_link_audio().
 * - type: video or audio. Otherwise MediaElement module determines it by the
 * file extension of $file.
 *
 * @return string
 * The html to inject into the page is returned. Apart from this, the
 * javaScript needed to support the html is added using Drupal APIs.
 */
function mediaelement_link_render($file, array $options = array()){}

/**
 * Implements hook_field_formatter_info().
 */
function mediaelement_link_field_formatter_info(){
  $formatters = array();
  $formatters['mediaelement_link_video'] = array(
    'label' => t('MediaElement Video Link'),
    'field types' => array(
      'file',
      'link_field'
    ),
    'settings' => array(
      'width' => variable_get('mediaelement_link_video_default_width', '180'),
      'height' => variable_get('mediaelement_link_video_default_height', '180')
    )
  );
  $formatters['mediaelement_link_audio'] = array(
    'label' => t('MediaElement Audio Link'),
    'field types' => array(
      'file',
      'link_field'
    ),
    'settings' => array(
      'width' => variable_get('mediaelement_link_audio_default_width', '180'),
      'height' => variable_get('mediaelement_link_audio_default_height', '180')
    )
  );
  return $formatters;
}

/**
 * Implements hook_field_formatter_view().
 */
function mediaelement_link_field_formatter_view($entity_type, $entity, $field, $instance, $langcode, $items, $display){
  $element = array();
  foreach($items as $delta => $item){
    $settings = $display['settings'];
    $element[$delta] = array(
      '#settings' => $settings
    );
    if($display['type'] == 'mediaelement_link_video'){
      $element[$delta]['#theme'] = 'mediaelement_link_video';
      $element[$delta]['#settings']['height'] = $display['settings']['height'];
      $element[$delta]['#settings']['width'] = $display['settings']['width'];
      $element[$delta]['#settings']['fid'] = $items[0]['fid'];
    }elseif($display['type'] == 'mediaelement_link_audio'){
      $element[$delta]['#theme'] = 'mediaelement_link_audio';
      $element[$delta]['#settings']['height'] = $display['settings']['height'];
      $element[$delta]['#settings']['width'] = $display['settings']['width'];
      $element[$delta]['#settings']['fid'] = $items[0]['fid'];
    }
  }
  return $element;
}

/**
 * Implements hook_theme().
 */
function mediaelement_link_theme(){
  return array(
    'mediaelement_link_video' => array(
      'variables' => array(
        'settings' => array()
      )
    ),
    'mediaelement_link_audio' => array(
      'variables' => array(
        'settings' => array()
      )
    )
  );
}

function theme_mediaelement_link_video($variables){
  $thumbnail_file = "public://mediaelement_link_thumbnail/{$variables['settings']['fid']}-{$variables['settings']['width']}x{$variables['settings']['height']}.jpg";
  $file = entity_load_single('file', $variables['settings']['fid']);
  if(!file_exists($thumbnail_file)){
    $full_size_file = "public://mediaelement_link_thumbnail/{$variables['settings']['fid']}.jpg";
    if(!file_exists($full_size_file)){
      exec('ffmpeg -ss 2 -i "' . drupal_realpath($file->uri) . '" -f image2 -vframes 1 ' . drupal_realpath($full_size_file));
    }
    $image = image_load($full_size_file);
    if($image){
      module_load_include('effects.inc', 'image');
      image_scale_and_crop_effect($image, $variables['settings']);
      image_save($image, $thumbnail_file);
      // Finally, we attempt to bitch slap that file with a play button.
      $real_path = drupal_realpath($thumbnail_file);
      @exec('convert "' . $real_path . '" "' . drupal_get_path('module', 'mediaelement_link') . '/images/play.png' . '" -gravity center -composite -format jpg -quality 90 "' . $real_path . '"');
    }
  }
  $entity_uri = entity_uri('file', $file);
  if(file_exists($thumbnail_file)){
    $output = l(theme('image', array(
      'title' => $file->filename,
      'path' => file_create_url($thumbnail_file)
    )), $entity_uri['path'], array(
      'html' => TRUE
    ));
  }else{
    $output = l(theme('image', array(
      'path' => file_create_url(file_icon_path($file))
    )), $entity_uri['path'], array(
      'html' => TRUE
    ));
  }
  return $output;
}

function theme_mediaelement_link_audio($variables){
  // FIXME - Allow users to dynamically set the size of the image
  $file = entity_load_single('file', $variables['settings']['fid']);
  $entity_uri = entity_uri('file', $file);
  $output = l(theme('image', array(
    'title' => $file->filename,
    'width' => 85,
    'height' => 85,
    'path' => file_create_url(drupal_get_path('module', 'mediaelement_link') . '/images/audio-icon.jpg')
  )), $entity_uri['path'], array(
    'html' => TRUE
  ));
  return $output;
}

/**
 * Implements hook_field_formatter_settings_form().
 */
function mediaelement_link_field_formatter_settings_form($field, $instance, $view_mode, $form, &$form_state){
  $display = $instance['display'][$view_mode];
  $settings = $display['settings'];
  $element = array();
  $element['width'] = array(
    '#title' => t('Width'),
    '#type' => 'textfield',
    '#default_value' => $settings['width']
  );
  $element['height'] = array(
    '#title' => t('Height'),
    '#type' => 'textfield',
    '#default_value' => $settings['height']
  );
  return $element;
}

/**
 * Implements hook_field_formatter_settings_summary().
 */
function mediaelement_link_field_formatter_settings_summary($field, $instance, $view_mode){
  $display = $instance['display'][$view_mode];
  $settings = $display['settings'];
  return t('Width: @width px, Height: @height px', array(
    '@width' => $settings['width'],
    '@height' => $settings['height']
  ));
}