<?php
// $Id: asset_emfield.module,v 1.1 2008-03-06 04:53:01 rz Exp $

/**
 * @file 
 * Asset Embedded Media Module
 *
 * Integration with emfield for using 3rd-party embedded media as assets.
 */

/**
 * Implementation of hook_asset_type().
 */
function asset_emfield_asset_type($op = 'info', &$asset = NULL){
  switch($op){
    case 'info':
      return array(
        'emfield_video' => array(
          'name' => t('Embedded Video'),
          'module' => 'asset_emfield',
          'description' => t('Create a new video asset using embed code from a 3rd-party site.'),
        ),
      ); 
      break;
      
    case 'form':
      return asset_emfield_invoke('form', $asset);
    case 'validate':
      asset_emfield_invoke('validate', $asset);
      break;
    case 'insert':
      asset_emfield_invoke('submit', $asset);
      $field = $asset->emfield[0];
      db_query('INSERT INTO {asset_emfield} (aid, embed, value, provider, data) VALUES (%d, "%s", "%s", "%s", "%s")', 
        $asset->aid, $field['embed'], $field['value'], $field['provider'], serialize($field['data']));
      break;
    case 'update':
      asset_emfield_invoke('submit', $asset);
      $field = $asset->emfield[0];
      db_query('UPDATE {asset_emfield} SET embed="%s", value="%s", provider="%s", data="%s" WHERE aid=%d', 
        $field['embed'], $field['value'], $field['provider'], serialize($field['data']), $asset->aid);
      break;
    case 'load':
      $result = db_query('SELECT * FROM {asset_emfield} WHERE aid=%d', $asset->aid);
      while($row = db_fetch_array($result)){
        $asset->emfield[0] = $row;
      }
      $return = asset_emfield_invoke('load', $asset);
      return array('emfield' => $return['emfield']);
      
    case 'view':
      switch($asset->type){
        case 'emfield_video':
          return asset_render($asset, 'video_video');
      }
      break;
      
    case 'img':
    case 'icon':
      if($asset->type == 'emfield_video'){
        $item = $asset->emfield[0];
        if ($item['value'] && $item['provider']) {
          // if we have emthumb installed, then give it a chance to override our thumbnail
          $thumbnail_url = module_invoke('emthumb', 'thumbnail_url', $item);
      
          // if we don't have a custom thumbnail, then see if the provider gives us one
          $thumbnail_url = $thumbnail_url ? $thumbnail_url : module_invoke('emfield', 'include_invoke', 'video_cck', $item['provider'], 'thumbnail', NULL, $item, NULL, NULL, 64, 64);

          return $thumbnail_url;        
        }            
      }
      break;
  }
}

/**
 * Implementation of hook_asset_formatter().
 */
function asset_emfield_asset_formatter($op='info',$asset=null,$attr=array()){
  $module_map = array(
    'emfield_video' => 'video_cck',
  );
  $module = $module_map[$asset->type];
  
  switch($op){          
    case 'info':
      foreach($module_map as $module){
        $cck_formats = module_invoke($module, 'field_formatter_info');
        foreach($cck_formats as $key => $cck_format){
          if($key != 'default'){
            $formats[$key] = array(
              'name' => $cck_format['label'],
              'description' => $cck_format['description'],
              'module' => 'asset_emfield',
            );
          }
        }
      }
      return $formats;
    case 'load':
      if($asset->type == 'emfield_video'){
        $formats = array();
        $cck_formats = module_invoke($module, 'field_formatter_info');
        foreach($cck_formats as $key => $cck_format){
          if($key != 'default'){
            $formats[] = $key;
          }
        }
        return $formats;
      }
      break;
      
    case 'render':
      return asset_emfield_invoke('render', $asset, $attr['format']);

    case 'form':
//      $function = 'asset_embed_'. $asset->embed['provider'] .'_'. $op;
//      if(function_exists($function)){
//        return call_user_func($function, $asset, $attr);
//      }
      break;      
  }
}

/**
 * helper function to bridge hook_asset_type and emfield cck hooks
 */
function asset_emfield_invoke($op, &$asset, $a3 = NULL){
  // TODO: use widget settings to provide a dynamic widget object
  $field = array(
    'field_name' => 'emfield',
    'type' => $map[$asset->type],
    'required' => 1,
    'multiple' => 0,
    'db_storage' => 1, // ????
    'widget' => array(
      'default_value' => array(
        0 => array('embed' => '', 'value' => ''),
      ),
      'providers' => array(
        // leave empty to allow all
      ),
      'type' => 'video_cck_textfields',
      'label' => t('Embedded Media'),
      'description' => '',
    ),
  );

  $module_map = array(
    'emfield_video' => 'video_cck',
  );
  $module = $module_map[$asset->type];
  
  $node = new stdClass();
  // emfield_emfield_field_formatter checks for a node type, and if not will load
  // the field widget settings.  the type doesn't really matter though.
  $node->type = '__asset';
        
  if($op == 'form'){
    return emfield_emfield_widget($op, $node, $field, $asset->emfield, $module);
  }
  elseif($op == 'render'){
    return module_invoke('emfield', 'emfield_field_formatter', $field, $asset->emfield[0], $a3, $node, $module);
  }
  else{
    return emfield_emfield_field($op, $node, $field, $asset->emfield, 0, 0, $module);
  }
  
}


function asset_emfield_asset_search($op = 'info', $type = NULL, $a3 = NULL) {
  // load all of our provider includes inside the asset_emfield module folder
  asset_emfield_system_list('asset_emfield');
  $module = 'video_cck';
  
  switch($op){
    case 'info':
      $providers = emfield_system_list($module);
      $searches = array();
      foreach($providers as $provider) {
        $info = emfield_include_invoke($module, $provider->name, 'asset_search', 'info');
        if($info && is_array($info)){
          $searches = $searches + $info;
        }                
      }
      return $searches;
            
    case 'url':
      $url = emfield_include_invoke($module, $type['emfield_provider'], 'asset_search', 'url', $type, $a3);
      return $url;
      
    case 'feed item':
      $asset = emfield_include_invoke($module, $type['emfield_provider'], 'asset_search', 'feed item', $type, $a3);      
      return $asset;
  }
}

/**
 * copied-and-modified version of emfield_system_list, to load our own provider includes
 */
function asset_emfield_system_list($module, $provider = NULL, $load = TRUE) {
  static $list = array();

  $files = drupal_system_listing("$provider\.inc", drupal_get_path('module', $module) . "/providers", 'name', 0);

  ksort($files);

  if ($load) {
    foreach ($files as $file) {
      if ($file && !isset($list[$file->name])) {
        include_once('./' . $file->filename);
        $list[$file->name] = $file->name;
      }
    }
  }

  return $files;
}