<?php
// $Id: asset.module,v 1.1.2.23 2008-04-11 21:23:34 wmostrey Exp $

define('ASSET_PRIVATE', 0);
define('ASSET_PUBLIC', 1);

function _asset_include() {
  // get the path once
  $path = drupal_get_path('module', 'asset');
  // load the views hooks if the views module is enabled
  if (module_exists('views')) {
    require_once($path .'/asset_views.inc');
  }
  // Load all our module 'on behalfs'.
  $files = drupal_system_listing('asset_.*\.inc$', $path .'/modules', 'name', 0);
  foreach ($files as $file) {
    // The filename format is very specific. It must be asset_MODULENAME.inc
    $module = substr_replace($file->name, '', 0, 6);
    if (module_exists($module)) {
      require_once("./$file->filename");
    }
  }
}

_asset_include();

/**
 * Implementation of hook_menu()
 */
function asset_menu($may_cache) {
  if ($may_cache) {
    $items[] = array(
      'path' => 'asset/widget/js',
      'callback' => 'asset_widget_js',
      'access' => user_access('access content'),
      'type' => MENU_CALLBACK,
    );
    $items[] = array(
      'type' => MENU_CALLBACK,
      'title' => t('Asset Wizard'), 
      'path' => 'asset/wizard', 
      'callback' => 'asset_wizard', 
      'access' => (user_access('create assets') || user_access('administer assets')),
    );
    $items[] = array(
      'type' => MENU_CALLBACK,
      'path' => 'asset/js/preview',
      'callback' => 'asset_js_preview',
      'access' => (user_access('create assets') || user_access('administer assets')),
    );
    $items[] = array(
      'path' => 'admin/settings/asset',
      'title' => t('Asset'), 
      'callback' => 'drupal_get_form', 
      'callback arguments' => array('asset_admin_settings'), 
      'access' => user_access('administer assets'),
    );
    $items[] = array(
      'path' => 'admin/settings/asset/settings',
      'title' => t('Settings'), 
      'access' => user_access('administer assets'),
      'type' => MENU_DEFAULT_LOCAL_TASK,
      'weight' => -1,
    );
    $items[] = array(
      'path' => 'admin/settings/asset/defaults',
      'title' => t('Formatter Defaults'), 
      'callback' => 'drupal_get_form', 
      'callback arguments' => array('asset_admin_formatter_defaults'), 
      'access' => user_access('administer assets'),
      'type' => MENU_LOCAL_TASK,
    );
    foreach (module_implements('asset_settings') as $module) {
      $items[] = array(
        'path' => 'admin/settings/asset/'. $module,
        'title' => $module,
        'callback' => 'drupal_get_form',
        'callback arguments' => array($module .'_asset_settings'),
        'access' => user_access('administer assets'),
        'type' => MENU_LOCAL_TASK,
        'weight' => 5,
      );
    }    
    $items[] = array(
      'path' => 'asset/img',
      'type' => MENU_CALLBACK,
      'callback' => 'asset_img_preview',
      'access' => user_access('administer assets'),
    );
  }
  else {
    module_invoke_all('asset_formatter', 'init');
    drupal_add_css(drupal_get_path('module', 'asset') .'/asset.css');
  }
  return $items;
}

/**
 * Implementation of hook_perm().
 */
function asset_perm() {
  $perms = array(
    'create assets',
    'administer assets'
  );
  foreach (module_implements('asset_type') as $module) {
    $types = module_invoke($module, 'asset_type', 'info');
    foreach ($types as $delta => $type) {
      $perms[] = 'create '. $delta .' assets';
    }
  }
  return $perms;
}

/**
 * Persist an asset object to the db
 * 
 * @param $asset
 *   asset object with filename, filepath, filemime, and filesize properties
 * @param $form_values
 *   form_values array from asset creation form. this allows asset_save to set
 *   the defaults for fields like title, author and permissions.
 */
function asset_save($asset, $form_values = array()) {
  $asset->filepath = trim(str_replace(file_directory_path(), '', $asset->filepath), '/');
  $info = pathinfo($asset->filepath);
  if ($info['dirname'] == '.') {
    $info['dirname'] = '';
  }
  $default_fields = array('title', 'author', 'description', 'roles', 'status');
  foreach ($default_fields as $field) {
    $asset->$field = $form_values[$field]; 
  }
  $asset->uid = $asset->uid ? $asset->uid : $GLOBALS['user']->uid;
  $asset->status = $asset->status ? ASSET_PUBLIC : ASSET_PRIVATE;
  $asset->type = $asset->type ? $asset->type : 'local';
  // make sure to set aid on the asset object, so modules can use it in assetapi insert
  $asset->aid = db_next_id('{asset}_aid');
  db_query("INSERT INTO {asset} (aid,type,dirname,filename,extension,filesize,uid,status,title,author,description) VALUES (%d, '%s', '%s', '%s', '%s', %d, %d, %d, '%s', '%s', '%s')", $asset->aid, $asset->type, $info['dirname'], $info['basename'], $info['extension'], $asset->filesize, $asset->uid, $asset->status, $asset->title, $asset->author, $asset->description);
  
  if ($asset->status == ASSET_PRIVATE && is_array($asset->roles)) {
    foreach ($asset->roles as $rid => $status) {
      db_query('INSERT INTO {asset_role} (aid, rid, status) VALUES (%d, %d, %d)', array($asset->aid, $rid, ($status ? ASSET_PUBLIC : ASSET_PRIVATE)));
    }
  }
  
  // We're also saving this in the files table to support the private download method
  $mime = function_exists(mime-content-type) ? mime-content-type($info['dirname'] ."/". $info['basename']) : "";
  $fid = db_next_id('{files}_fid');
  db_query("INSERT INTO {files} (fid, nid, filename, filepath, filemime, filesize) VALUES (%d, %d, '%s', '%s', '%s', %d)", $fid, 0, $info['basename'], file_directory_path() ."/". $info['dirname'] ."/". $info['basename'], $mime, $asset->filesize);
  db_query("INSERT INTO {file_revisions} (fid, vid, list, description) VALUES (%d, %d, %d, '%s')", $fid, 0, 0, $info['basename']);
  
  module_invoke_all('assetapi', 'insert', $asset);  
  return asset_load($asset->aid);
}

/**
 * Load an asset object from db and set some default properties. 
 * Taken almost exactly from node_load to utilize caching and assetapi load hook
 * 
 * @param $aid
 *    id of asset to load
 */
function asset_load($param = array(), $reset = NULL) {
  static $assets = array();
  if ($reset) {
    $assets = array();
  }
  $arguments = array();
  if (is_numeric($param)) {
    if (isset ($assets[$param])) {
      return is_object($assets[$param]) ? drupal_clone($assets[$param]) : $assets[$param];
    }
    $cond ='a.aid = %d';
    $arguments[] = $param;
  }
  elseif (is_array($param)) {
    // Turn the conditions into a query.
    foreach ($param as $key => $value) {
      $cond[] ='a.'. db_escape_string($key) ." = '%s'";
      $arguments[] = $value;
    }
    $cond = implode(' AND ', $cond);
  }
  // Retrieve the asset.
  $asset = db_fetch_object(db_query('SELECT a.* FROM {asset} a WHERE '. $cond, $arguments));
  if (!$asset) {
    return false;
  }
  $dirname_tmp = $asset->dirname ? $asset->dirname .'/' : $asset->dirname;
  $result = db_query('SELECT * FROM {asset_role} WHERE aid=%d', $asset->aid);
  while ($role = db_fetch_array($result)) {
    $asset->roles[$role['rid']] = $role['status'] ? $role['rid'] : 0;
  }
  $asset->filepath = file_create_path($dirname_tmp . $asset->filename);
  $asset->url = file_create_url($dirname_tmp . $asset->filename);
  $asset->extension = strtolower($asset->extension);
  $asset->title = $asset->title ? $asset->title : $asset->filename;
  if ($asset->type == 'directory' && $asset->dirname == '' && $asset->filename == $GLOBALS['user']->name) {
    $asset->title = t('My Assets');
  }
  if ($asset->aid) {
    if ($extra = module_invoke_all('assetapi', 'load', $asset)) {
      foreach ($extra as $key => $value) {
        $asset->$key = $value;
      }
    }
    $assets[$asset->aid] = is_object($asset) ? drupal_clone($asset) : $asset;
  }
  return $asset;
}

/**
 * Admin Settings
 */
function asset_admin_settings() {
  $form['asset_access_option'] = array(
    '#type' => 'radios', 
    '#title' => t('Visibility Options'), 
    '#default_value' => variable_get('asset_access_option', 1),
    '#options' => array(
      t('Show on every page except the listed pages.'), 
      t('Show on only the listed pages.'),
      t('Show if the following PHP code returns <code>TRUE</code> (PHP-mode, experts only).'),
    ),    
  );
  $form['asset_access_pages'] = array(
    '#type' => 'textarea', 
    '#title' => t('Pages'), 
    '#default_value' => variable_get('asset_access_pages', "node/add/*\nnode/*/edit"), 
    '#description' => t("Enter one page per line as Drupal paths. The '*' character is a wildcard. Example paths are 'blog' for the blog page and blog/* for every personal blog. <front> is the front page.If the PHP-mode is chosen, enter PHP code between <?php ?>. Note that executing incorrect PHP-code can break your Drupal site. Also note that if you are using a WYSIWYG editor, the asset button may be available in that editor regardless of this setting."),
  );
  $form['asset_wizard_theme'] = array(
    '#type' => 'fieldset',
    '#title' => t('Wizard theme'),
    '#theme' => 'asset_wizard_theme_form',
  );
  $paths = array(
    drupal_get_path('module', 'asset') .'/themes',
    drupal_get_path('theme', variable_get('theme_default', 'garland')),
  );
  foreach ($paths as $path) {
    $files = file_scan_directory($path, 'asset_wizard\.css$');
    foreach ($files as $filename => $file) {
      $form['asset_wizard_theme'][$filename] = array(
        '#type' => 'radio',
        '#return_value' => $filename,
        '#default_value' => variable_get('asset_wizard_theme', drupal_get_path('module', 'asset') .'/themes/default/asset_wizard.css'),
        '#parents' => array('asset_wizard_theme'),
      );      
    }
  }
  return system_settings_form($form);
}

/**
 * Menu callback for selection of default formatting options.
 */
function asset_admin_formatter_defaults() {
  $form = array();
  $formatters = asset_get_formatters(true);
  foreach ($formatters as $type => $exts) {
    $form[$type] = array(
      '#type' => 'fieldset',
      '#title' => $type == '*' ? t('All Types') : $type,
      '#tree' => false,
    );
    foreach ($exts as $ext => $formats) {
      $form[$type]['asset_default_formatter_'. $type .'_'. $ext] = array(
        '#type' => 'select',
        '#title' => $ext,
        '#options' => asset_formatter_options($type, $ext), 
        //'#default_value' => variable_get('asset_default_formatter_'. $type . '_' . $ext, 'asset:link'),
        '#default_value' => asset_get_default_formatter($type, $ext, FALSE),
      );
      $form[$type]['asset_default_formatter_teaser_'. $type .'_'. $ext] = array(
        '#type' => 'select',
        '#title' => $ext,
        '#options' => asset_formatter_options($type, $ext), 
        //'#default_value' => variable_get('asset_default_formatter_teaser_' . $type . '_' . $ext, 'asset:link'),
        '#default_value' => asset_get_default_formatter($type, $ext, TRUE),
      );
    }
  }
  return system_settings_form($form);
}

/**
 * Implementation of hook_nodeapi()
 * This is where we build the asset_node records.
 */
function asset_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL) {
  switch ($op) {
    // must do this on submit rather than update or insert because we want the 
    // pre filtered node->body
    case 'submit':
      // clear previous count
      db_query('DELETE FROM {asset_node} WHERE nid=%d', $node->nid);
      // only update if using a format that includes the asset filter
      $filters = filter_list_format($node->format);
      if (!$filters['asset/0']) {
        return;
      }
      $refs = array();
      foreach (asset_get_macros($node->body) as $macro) {
        $refs[$macro['aid']]++;
      }
      foreach ($refs as $aid => $ref) {
        db_query('INSERT INTO {asset_node} (aid,nid,refs) VALUES (%d,%d,%d)', $aid, $node->nid, $ref);
      }
      break;
    case 'load' :
      $result = db_query('SELECT * FROM {asset_node} WHERE nid=%d AND refs > 0', $node->nid);
      while ($asset = db_fetch_object($result)) {
        $additions['assets'][] = asset_load($asset->aid);
      }
      return $additions;
    case 'view' :
      foreach ($node as $fieldname => $value) {
        if (substr($fieldname, 0, 6)=="field_") {
          // For each cck field, check if it's an asset field
          $fields = content_fields($fieldname, $node->type);
          if ($fields['type']=="value") { // The asset computer name is "value"
            $assetcheck = 1;
            /*
            // Only works in PHP5, as reported by scroogie
            foreach ($node->$fieldname as &$asset) {
              // Add the html code for the preview
              if (!empty($asset['aid'])) $asset['value'] = asset_preview($asset['aid']);
            }
            */
            foreach (array_keys($node->fieldname) as $key) {
              // Add the html code for the preview
              if (!empty($node->fieldname[$key]['aid'])) $node->fieldname[$key]['value'] = asset_preview($node->fieldname[$key]['aid']);
            }
          }
        }
      }
      break;
  }
}

/**
 * Integrate asset with lightbox
 */
function asset_lightbox($assets, $preview = 0) {
  if (!$preview && file_exists(path_to_theme()  ."/lightbox/lightbox.js")) {
    // Do not include Lightbox integration in preview mode: it breaks the jQuery fieldsets
    drupal_add_js(path_to_theme()  ."/lightbox/prototype.js");
    drupal_add_js(path_to_theme()  ."/lightbox/scriptaculous.js?load=effects");
    drupal_add_js(path_to_theme()  ."/lightbox/lightbox.js");
    drupal_add_css(path_to_theme() ."/lightbox/lightbox.css");
  }
  $output     = "";
  $is_image   = array('jpg', 'jpeg', 'png', 'gif', 'tif', 'tiff', 'bmp');
  $is_audio   = array('mp3', 'wma', 'wav', 'ogg', 'm4a', 'aac');
  $count      = 1;
  $total      = 3;
  $imgpresent = 1;
  $imgcount   = 0;
  $imgdisplay = 0;
  $firstimg   = "";
  foreach ($assets as $asset) {
    $a = asset_load(array('aid' => $asset['aid']));
    if (in_array($a->extension, $is_image)) {
      // If it's an image and imagecache configuration has been done, display the imagecached version
      $imagecache = asset_get_default_formatter('local', $a->extension, FALSE);
      if (function_exists('theme_imagecache') && substr($imagecache, 0, 11) =="imagecache:") {
      	list($imagecache, $preset) = split(":", $imagecache);
        $img  = theme('imagecache', $preset, $a->filepath, $asset['caption'], $asset['caption']);
      }
      else {
        $img  = theme('image', $a->filepath, $asset['caption'], $asset['caption']);        
      }
      $link  ='<a href="'. file_create_url($a->filepath) .'" rel="lightbox[gallery]" title="'. str_replace("\"", "'", $asset['caption']);
      $link .= $asset['copyright'] ? '<br/>&#169; '. str_replace("\"", "'", $asset['copyright']) .'"' : '"';
      // We only want to display $total thumbnails, but we need the html for the lightbox gallery
      if ($count > $total) {
        $link .=" style='display:none'";
      }
      else {
        $imgdisplay++;
      }
      if (empty($firstimg)) $firstimg = $link .">";
      $link .=">". $img ."</a>";
      $output .= $link;
      if ($count <= $total) {
        $output .= $asset['caption'] ? "<p>". $asset['caption'] ."</p>" : "";
        $output .= $asset['copyright'] ? "<p class='attribution'>&#169; ". $asset['copyright'] ."</p>" : "";
        $output .="<br/>";
      }
      $imgcount++;
    }
    else {
      // Not an image so automatically asset_preview() it
      $output .= asset_preview($asset['aid']);
      $output .= $asset['caption'] ? "<p>". $asset['caption'] ."</p>" : "";
      $output .= $asset['copyright'] ? "<p class='attribution'>&#169; ". $asset['copyright'] ."</p>" : "";
      if (in_array($a->extension, $is_audio)) {
        $output .='<p><a href="'. file_create_url($a->filepath) .'">'. t("Download this audio file") .'</a></p>';
      }
    }
    $count++;
  }
  if (!empty($imgcount) && $imgcount > $imgdisplay) {
    $firstimg = str_replace("style='display:none'", "", $firstimg);
    $output .= t('<br/><div class="view-all-images">'. $firstimg .'%mycount </a></div>', array('%mycount' => format_plural($imgcount, 'View the image', 'View all @count images')));
  }
  return $output;
}

/**
 * Implementation of hook_filter().
 */
function asset_filter($op, $delta = 0, $format = -1, $text = '') {
  switch ($op) {
    case 'list' :
      return array(0 => t('Inline file assets'));

    case 'description' :
      return t('Add formatted file assets to your posts.');

    case 'process' :
      foreach (asset_get_macros($text) as $unexpanded_macro => $macro) {
        $expanded_macro = asset_render_macro($macro);
        $text = str_replace($unexpanded_macro, $expanded_macro, $text);
      }
      return $text;
    default :
      return $text;
  }
}

/**
 * Implementation of hook_filter_tips().
 */
function asset_filter_tips($delta, $format, $long = false) {
  if ($long) {
    return t('Inline assets are allowed.  Use the Insert Assets link or the WYSIWYG editor button to insert the proper format.');
  }
  else {
    return t('Inline assets are allowed.');
  }
} 

/**
 * Return all macros as an array.
 */
function asset_get_macros($text) {
  $m = array();
  preg_match_all('/ \[ ( [^\[\]]+ )* \] /x', $text, $matches);
  $tag_match = (array)array_unique($matches[1]); // Don't process duplicates.
  foreach ($tag_match as $macro) {
    $current_macro = '['. $macro .']';
    $param = array_map('trim', explode('|', $macro));
    $func_name = array_shift($param); // The first macro param is assumed to be the function name.
    //$num_params = count($param); // Get the number of parameters
    if ($func_name == 'asset') {
      $vars = array();
      foreach ($param as $p) {
        $pos = strpos($p, '=');
        $varname = substr($p, 0, $pos);
        $varvalue = substr($p, $pos +1);
        $vars[$varname] = $varvalue;
      }
      // the full unaltered filter string is the key for the array of filter attributes
      $m[$current_macro] = $vars;
    }
  }
  return $m;
}

/** 
 * build html from atrributes array.
 * 
 * @param $attr
 *   Array of attributes parsed from filter macro.
 */
function asset_render_macro($attr = array()) {
  $asset = asset_load($attr['aid']);
  $asset->title = $attr['title'] ? $attr['title'] : $asset->title;
  if ($attr['formatter']) {
    $content = module_invoke($attr['formatter'], 'asset_formatter', 'render', $asset, $attr);
    return theme('asset', $content, $attr);
  }
  else {
    return theme('asset_render_default', $asset);
  }
}

/**
 * Build a macro from the specified attributes.
 */
function asset_build_macro($attr = array()) {
  $macro = '[asset';
  foreach ($attr as $k => $v) {
    $macro .='|'. $k .'='. $v;
  }
  $macro .=']';
  return $macro;
}

/**
 * Utility function to retrieve a list of all available formatters.
 * 
 * @return array
 *     returns an array keyed by filetype(extension) with elements as arrays of format information.
 */
function asset_get_formatters($reset = FALSE) {
  static $formatters;
  if (!isset($formatters) || $reset) {
    if (!$reset && ($cache = cache_get('asset_formatters')) && !empty($cache->data)) {
      $formatters = unserialize($cache->data);
    }
    else{
      $formatters = array();
      foreach (module_implements('asset_formatter') as $module) {
        $list = module_invoke($module, 'asset_formatter', 'info');
        foreach ((array)$list as $key => $data) {
          $data['module'] = $module;
          $data['format'] = $key;
          foreach ($data['types'] as $type => $exts) {
            foreach ($exts as $ext) {
              $formatters[$type][$ext][] = $data;
            }
          }
        }
      }
      cache_set('asset_formatters', 'cache', serialize($formatters));
    }
  }
  return $formatters;
}

/**
 * Utility function to return an array of available formatters for a file suitable for FAPI #options
 * 
 * @param $filename
 *    Filename to retrieve options for.  Will also work with just an extension.
 */
function asset_formatter_options($type = '*', $filename = null) {
  $pos = strrpos($filename, '.');
  if ($pos === false) {
    // allow for case where extension is passed instead of filename
    $ext = $filename;
  }
  else {
    $ext = substr($filename, $pos +1);
  }
  $formatters = asset_get_formatters();
  $options = array();
  if (is_array($formatters[$type][$ext])) {
    foreach ($formatters[$type][$ext] as $formatter) {
      $options[$formatter['module'] .':'. $formatter['format']] = $formatter['name'];
    }
  }
  if (is_array($formatters[$type]['*'])) {
    foreach ($formatters[$type]['*'] as $formatter) {
      $options[$formatter['module'] .':'. $formatter['format']] = $formatter['name'];
    }
  }
  if (is_array($formatters['*']['*'])) {
    foreach ($formatters['*']['*'] as $formatter) {
      $options[$formatter['module'] .':'. $formatter['format']] = $formatter['name'];
    }
  }
  return $options;
}

/**
 * Menu callback to load the asset popup window.
 */
function asset_wizard() {
  // all wizard related functionality first comes through this function so load the wizard inc
  require_once(drupal_get_path('module', 'asset') .'/asset_wizard.inc');
  drupal_add_js(array('asset' => array('basePath' => base_path())), 'setting');
  drupal_add_js(drupal_get_path('module', 'asset') .'/asset.js');
  drupal_add_css(drupal_get_path('module', 'asset') .'/asset_wizard.css');
  list($sites, $site, $lost) = split("/", drupal_get_path('module', 'asset'), 3);
  $theme = variable_get('asset_wizard_theme', drupal_get_path('module', 'asset') .'/themes/default/asset_wizard.css');
  drupal_add_css($theme);
  switch (arg(2)) {
    case 'textarea' :
      drupal_add_js(drupal_get_path('module', 'asset') .'/asset_textarea.js');
      break;
    case 'textfield' :
      drupal_add_js(drupal_get_path('module', 'asset') .'/asset_textfield.js');
      break;       
    case 'tinymce' :
      drupal_add_js(drupal_get_path('module', 'tinymce') .'/tinymce/jscripts/tiny_mce/tiny_mce_popup.js');
      drupal_add_js(drupal_get_path('module', 'asset') .'/tinymce/asset_tinymce.js');
      break;
  }
  $output = drupal_get_form('asset_wizard_form');
  ob_end_clean();
  print theme('asset_popup', $output);
  exit;
}

/**
 * Implementation of hook_elements
 * This is where we add the link to textareas
 */
function asset_elements() {
  $type['textarea'] = array('#process' => array('asset_textarea' => array()));
  return $type;
}

/**
 * The #process callback function for the textareas
 */
function asset_textarea($element) {
  if (_asset_page_match()) {
    $output = theme('asset_textarea_link', $element);
    $element['#suffix'] .= $output;
    
    if (module_exists('tinymce')) {
      drupal_add_js(drupal_get_path('module', 'asset') .'/tinymce/asset_tinymce_helper.js');
    }
  }
  return $element;
}

/**
 * Should we show the insert access link, determined by admin setting
 * Borrowed from tinymce.module
 *
 * @return
 *   TRUE if can render, FALSE if not allowed.
 */
function _asset_page_match() {
  $page_match = FALSE;
  if (!user_access('create assets') && !user_access('administer assets')) return $page_match;
  $access_option = variable_get('asset_access_option', 1);
  $access_pages = variable_get('asset_access_pages', "node/add/*\nnode/*/edit");
  if ($access_pages) {
    // If the PHP option wasn't selected
    if ($access_option < 2) {
      $path = drupal_get_path_alias($_GET['q']);
      $regexp = '/^('. preg_replace(array('/(\r\n?|\n)/', '/\\\\\*/', '/(^|\|)\\\\<front\\\\>($|\|)/'), array('|', '.*', '\1'. preg_quote(variable_get('site_frontpage', 'node'), '/') .'\2'), preg_quote($access_pages, '/')) .')$/';
      $page_match = !($access_option xor preg_match($regexp, $path));
    }
    else {
      $page_match = drupal_eval($access_pages);
    }
  }
  // No pages were specified to block so show on all
  else {
    $page_match = TRUE;
  }
  return $page_match;
}

/**
 * Menu Callback from javascript to print an assets preview
 */
function asset_js_preview($aid, $show_details=true, $return=false) {
  if (!isset($aid)) exit;
  $asset = asset_load($aid);
  $formatters = asset_get_formatters();
  if (isset($formatters[$asset->type][$asset->extension][0])) {
    $format = $formatters[$asset->type][$asset->extension][0];
  }
  elseif (isset($formatters[$asset->type]['*'][0])) {
    $format = $formatters[$asset->type]['*'][0];
  }
  else {
    $format = $formatters['*']['*'][0];
  }
  $output .= '<div>'. $asset->filename .'</div>';
  $output .= asset_preview($asset->aid);
  if ($show_details) {
    $details[t('File Size')] = format_size($asset->filesize);
    $details = array_merge($details, (array) module_invoke($format['module'], 'asset_formatter', 'details', $asset, $format));
    foreach ($details as $label => $value) {
      $output .= '<div><strong>'. check_plain($label) .'</strong>: '. check_plain($value) .'</div>';
    }
  }
  if ($return) {
    return $output;
  }
  print $output;
  exit;
}

/**
 * Build a preview of an asset based on module and format options.  If no module
 * and format info is given then the default teaser formatter is used.
 */
function asset_preview($aid, $module = NULL, $format = NULL) {
  $asset = asset_load($aid);
  if (!$module || !$format) {
    $formatter = asset_get_default_formatter($asset->type, $asset->extension, TRUE);
    list($module, $format) = explode(':', $formatter);
  }
  $output = module_invoke($module, 'asset_formatter', 'preview', $asset, array('format' => $format));
  return $output;
}

/**
 * Callback function to output an image for preview of an asset.
 */
function asset_img_preview($aid, $module = NULL, $format = NULL) {
  $asset = asset_load($aid);
  if (!$module || !$format) {
    $formatter = asset_get_default_formatter($asset->type, $asset->extension, TRUE);
    list($module, $format) = explode(':', $formatter);
  }
  $src = module_invoke($module, 'asset_formatter', 'img', $asset, array('format' => $format));
  // We're not useing drupal_goto because filenames will have the language code prepended
  // return drupal_goto($src);
  $src = (substr($src, 0, 5) != "http:") ? base_path() . $src : $src;
  return header('location: '. $src);
}


/**
 * Modified version of file_transfer()
 * 
 * Only output image formats and do not require src to be in file_directory_path
 */
function asset_img_output($src) {
  ob_end_clean();
  $mimes = array(
    'jpg' => 'image/jpeg',
    'gif' => 'image/gif',
    'png' => 'image/x-png',
  );
  $info = pathinfo($src);
  if (!$mimes[$info['extension']]) {
    return drupal_not_found();
  }
  header('Content-type: '. $mimes[$info['extension']]);
  if ($fd = fopen($src, 'rb')) {
    while (!feof($fd)) {
      print fread($fd, 1024);
    }
    fclose($fd);
  }
  else {
    drupal_not_found();
  }
  exit();
}

/**
 * Wrapper for file_check_directory that also checks/adds a matching asset
 */
function asset_check_directory(&$directory, $mode = 0, $form_item = NULL, $form_values = array()) {
  $return = file_check_directory(file_create_path($directory), $mode, $form_item);
  $pathinfo = asset_pathinfo($directory);
  if ($return && ($mode & FILE_CREATE_DIRECTORY)) {
    $asset = asset_load(array('dirname' => $pathinfo['dirname'], 'filename' => $pathinfo['basename']));
    if (!$asset && $form_item!='folder') {
      $asset = new stdClass();
      $asset->filepath = $directory;
      $asset->filesize = 0;
      $asset->type = 'directory';
      asset_save($asset, $form_values);
    }
  }
  return $return;
}

/**
 * Get the default formatter for a given type and extension
 */
function asset_get_default_formatter($type, $ext, $teaser = false) {
  $prefix = 'asset_default_formatter_'. ($teaser ? 'teaser_' : '');
  $vars = array(
    $prefix . $type .'_'. $ext,
    $prefix . $type .'_*',
    $prefix .'*_*',
  );
  foreach ($vars as $var) {
    if ($formatter = variable_get($var, false)) {
      break;
    }
  }
  // if var is not set, then cascade through possible formatters to find a suitable one  
  if (!$formatter) {
    $formatters = asset_get_formatters();
    if (isset ($formatters[$type][$ext][0])) {
      $format = $formatters[$type][$ext][0];
    }
    elseif (isset($formatters[$type]['*'][0]) ) {
      $format = $formatters[$type]['*'][0];
    }
    else {
      $format = $formatters['*']['*'][0];
    }
    $formatter = $format['module'] .':'. $format['format'];
  }
  return $formatter;
}

/**
 * Helper function to build a query string from an array
 */
function asset_build_query($data) {
  foreach ($data as $k => $v) {
    $items[] = "$k=$v";
  }
  return join('&', $items);
}

/**
 * wrapper around pathinfo() that strips file_directory_path from path and .
 * from dirname
 */
function asset_pathinfo($path) {
  $path = trim(str_replace(file_directory_path(), '', $path), '/');
  $info = pathinfo($path);
  if ($info['dirname'] == '.') {
    $info['dirname'] = '';
  }
  return $info;
  
}

/** 
 * Asset API Implementation ===================================================
 */

/**
 * Implementation of hook_asset_formatter().
 */
function asset_asset_formatter($op = 'info', $asset = NULL, $attr = array()) {
  switch ($op) {
    case 'info':
      $formats['link'] = array(
        'name' => t('Link'), 
        'types' => array('*' => array('*')),
        'description' => t('A simple download link.'),
      );
      $formats['image'] = array(
        'name' => t('Image'), 
        'types' => array('local' => array('jpg', 'gif', 'png')),
        'description' => t('The full-size image.'),
      );
      return $formats;
    case 'options':
      switch ($attr['format']) {
        case 'image' :
          $info = image_get_info(file_create_path($asset->filepath));
          $form['height'] = array(
            '#type' => 'textfield',
            '#title' => t('Height'),
            '#size' => '10',
            '#default_value' => !isset($_GET['height']) ? $info['height'] : filter_xss($_GET['height']),
          );
          $form['width'] = array(
            '#type' => 'textfield',
            '#title' => t('Width'),
            '#size' => '10',
            '#default_value' => !isset($_GET['width']) ? $info['width'] : filter_xss($_GET['width']),
          );
          $form['resizable'] = array(
            '#type' => 'hidden',
            '#value' => 'true',
          );
          return $form;
        default :
          return array();
      }
      break;
    case 'render':
      switch ($attr['format']) {
        case 'image' :
          $img_attributes = array(
            'title' => $attr['title'],
            'alt'   => $attr['title'],
          );
          if ($attr['height']) {
            $img_attributes['height'] = $attr['height'];
          }
          if ($attr['width']) {
            $img_attributes['width'] = $attr['width'];
          }
          return '<img src="'. file_create_url($asset->filepath) .'" '. drupal_attributes($img_attributes) .' />';
        default :
          return theme('asset_render_default', $asset);
      }
      break;
    case 'preview':
      switch ($attr['format']) {
        case 'image' :
          return theme('image', file_create_path($asset->filepath), '', '', array('width' => '100'), false);
        case 'link' :
          return theme('asset_render_default', $asset);
      }
      break;
    case 'details':
      switch ($attr['format']) {
        case 'image' :
          $info = image_get_info(file_create_path($asset->filepath));
          return array(
            t('Width') => $info['width'] .'px', 
            t('Height') => $info['height'] .'px',
          );
      }
      return array();
    case 'img':
      switch ($attr['format']) {
        case 'image' :
          return file_create_url($asset->filepath);
        case 'link' :
        default :
          // when we get around to building icons.
          $icon = drupal_get_path('module', 'asset') .'/icons/'. $asset->extension .'.png';
          if (file_exists($icon)) {
            return $icon;
          }
          // if all else fails send back a transparent gif so the default bg image shows
          return drupal_get_path('module', 'asset') .'/transparent.gif';
      }
      break;
  }    
}

/**
 * Implementation of hook_asset_type().
 */
function asset_asset_type($op = 'info', $delta = 0, $form_values=array()) {
  switch ($op) {
    case 'info':
      $info['upload'] = array(
        'value' => t('Upload'),
        'title' => t('Upload a new file.'),
        'src' => drupal_get_path('module', 'asset') .'/lullacons/doc-option-add.png',
      );
      $info['directory'] = array(
        'value' => t('New Folder'),
        'title' => t('Create a new folder.'),
        'src' => drupal_get_path('module', 'asset') .'/lullacons/folder-option-add.png',
      );
      $info['directory-del'] = array(
        'value' => t('Delete Folder'),
        'title' => t('Delete the current folder.'),
        'src' => drupal_get_path('module', 'asset') .'/lullacons/folder-option-remove.png',
      );
      return $info;
    case 'form':
      $form['module'] = array('#type' => 'value', '#value' => 'asset');
      if ($delta == 'upload') {
        $form['upload'] = array(
          '#type' => 'file',
          '#title' => t('Upload a File'),
          '#size' => 35,
          '#weight' => -1,
        );
      }
      if (empty($_SESSION['asset_op'])) {
        // Don't allow the asset cck to select a width/size or imagecache preset
        $form['#redirect'] = "node/1";
      }
      $form['#attributes']['enctype'] = 'multipart/form-data';
      return $form;
    case 'validate':
      // must return a valid asset aid
      if ($delta == 'upload') {
        if ($file = file_check_upload('upload')) {
          $parent_tmp = $form_values['parent'] ? $form_values['parent'] .'/' : $form_values['parent'];
          $path = file_create_path($parent_tmp . $file->filename);
          if ($file = file_save_upload('upload', $path)) {
            $asset = asset_save($file, $form_values);
            drupal_set_message(t("The file $file->filename has been successfully uploaded."));
            if (isset($_SESSION['asset_fieldname'])) {
              drupal_goto(filter_xss($_GET['q']), 'dir='. filter_xss($_GET['dir']));
            }
            else {
              return $asset->aid;
            }
          }
          else{
            form_set_error('upload', 'Error saving file to <em>'. $path .'</em>');
          }
        }
        else{
          form_set_error('upload', 'Error uploading file</em>');
        }
      }
      else{
        $parent_tmp = $form_values['parent'] ? $form_values['parent'] .'/' : $form_values['parent'];
        $dir = $parent_tmp . $form_values['title'];
        if (asset_check_directory($dir, FILE_CREATE_DIRECTORY)) {
          $query = $_GET;
          unset($query['q']);
          $query['dir'] = trim(str_replace(file_create_path(), '', $dir), '/');
          drupal_goto($_GET['q'], asset_build_query($query));
        }
        else{
          form_set_error('title', t('Error creating directory.'));
        }
      }
      break;
    case 'submit':
      break;
  }
}

/**
 * Theme Functions ============================================================
 */

/**
 * Theme rendered assets
 */
function theme_asset($content, $attributes) {
  if ($attributes['formatter']=="imagecache" || $attributes['format']=="image") {
    // We don't put images in a div because IE6 doesn't like <a><div><img/></div></a></>
    $align = 'asset-align-'. ($attributes['align'] ? $attributes['align'] : 'none');
    $content = str_replace("/>", "class=\"". $align ."\"/>", $content);
    return $content;
  }
  else {
    $class ='asset-'. $attributes['formatter'] .'-'. $attributes['format'];
    $class .=' asset-align-'. ($attributes['align'] ? $attributes['align'] : 'none');
    $output ='<span class="'. $class .'">'. $content .'</span>';
    return $output;
  }
}

/**
 * Theme the wizard theme selection table.
 */
function theme_asset_wizard_theme_form($form) {
  foreach (element_children($form) as $filename) {
    if (file_exists(dirname($filename) .'/asset_wizard.png')) {
      $screenshot = theme('image', dirname($filename) .'/asset_wizard.png');
    }
    else{
      $screenshot ='No screenshot available';
    }
    $rows[] = array(
      $screenshot,
      '<strong>'. basename(dirname($filename)) .'</strong><br/>'. $filename,
      drupal_render($form[$filename]),
    );
  }
  return theme('table', array(t('Screenshot'), t('Name'), ''), $rows);
}

function theme_asset_admin_formatter_defaults($form) {
  $formatters = asset_get_formatters();
  foreach ($formatters as $type => $exts) {
    $rows = array();
    foreach ($exts as $ext => $formats) {
      unset($form[$type]['asset_default_formatter_'. $type .'_'. $ext]['#title']);
      unset($form[$type]['asset_default_formatter_teaser_'. $type .'_'. $ext]['#title']);
      $rows[] = array(
        $ext,
        drupal_render($form[$type]['asset_default_formatter_'. $type .'_'. $ext]),
        drupal_render($form[$type]['asset_default_formatter_teaser_'. $type .'_'. $ext]),
      );
    }
    $form[$type]['#value'] = theme('table', array('', 'Full Page', 'Teaser'), $rows);
  }
  return drupal_render($form);
}

/**
 * Default rendering available to all assets.
 */
function theme_asset_render_default($asset) {
  if(substr($asset->url, 0, 5) != "http:") {
    $asset->url = url($asset->url);
  }
  $asset->title = $asset->title ? $asset->title : $asset->filename;
  return '<a href="'. $asset->url .'" class="asset">'. $asset->title .'</a>';
}

/**
 * Theme the textarea link
 */
function theme_asset_textarea_link($element) {
  $link = l(t('Insert Assets'), 'asset/wizard/textarea', array(
    'class' => 'asset-textarea-link',
    'id' => 'asset-link-'. $element['#id'],
    'onclick' => "window.open(this.href, 'asset_textarea_link', 'width=600,height=400,scrollbars=yes,status=yes,resizable=yes,toolbar=no,menubar=no'); return false",
  ), 'textarea='. $element['#name']);
  $output .='<div>'. $link .'</div>';
  return $output;
}