<?php

function fb_form_group_options($fbu) {
  $groups = fb_get_groups_data($fbu);
  $items = array();
  if ($groups && count($groups))
    foreach ($groups as $data) {
      $items[$data['gid']] = $data['name'];
    }
  // TODO: alphabetize list
  return $items;
  }

function fb_form_friend_options($fbu) {
  global $fb;
  $items = array();

  if ($fb) {
    $query = "SELECT last_name, first_name, uid, pic_square FROM user WHERE uid IN (SELECT uid2 FROM friend WHERE uid1=$fbu)";
    $result = $fb->api_client->fql_query($query);
    
    // TODO: sort results by name
    foreach ($result as $data) {
      $items[$data['uid']] = $data['first_name'] . ' ' . $data['last_name'];
    }
  }
  return $items;
}

function fb_form_group_member_options($fbg, $fbu) {
  global $fb;

  $query = "SELECT uid FROM group_member WHERE gid=$fbg";
  $result = $fb->api_client->fql_query($query);
  drupal_set_message("fb_form_group_member_options($fbg, $fbu) query $query returns" . dpr($result, 1));


  $query = "SELECT uid, first_name, last_name FROM user WHERE uid IN (SELECT uid FROM group_member WHERE gid=$fbg)";
  $result = $fb->api_client->fql_query($query);
  drupal_set_message("fb_form_group_member_options($fbg, $fbu) query $query returns" . dpr($result, 1));

  // TODO: sort results by name
  $options = array();
  foreach ($result as $data) {
    if ($data['uid'] != $fbu)
      $options[$data['uid']] = $data['first_name'] . ' ' . $data['last_name'];
  }
  return $options;
}

function fb_form_elements() {
  $items = array();

  $items['friend_selector'] = array('#input' => TRUE,
                                    '#tree' => TRUE,
                                    '#process' => array('friend_selector_process' => array()),
  );
  
  return $items;
  }

function friend_selector_process($orig) {
  global $fb;
  if (!$fb)
    // TODO: Handle this better.
    return;
    
  static $options = NULL;
  if (!$options) {
    $query = "SELECT last_name, first_name, uid, pic_square FROM user WHERE uid IN (SELECT uid2 FROM friend WHERE uid1=".fb_facebook_user().")";
    $result = $fb->api_client->fql_query($query);
    
    // TODO: sort results by name
    $options = array();
    foreach ($result as $data) {
      $options[$data['uid']] = $data['first_name'] . ' ' . $data['last_name'];
    }
  }
  // TODO: display small picture along with name in select box.
  $element = array();
  foreach (array('#title', '#parents', '#description', '#default_value', '#weight', '#multiple', '#required', '#name', '#value') as $key)
    if (isset($orig[$key]))
      $element[$key] = $orig[$key];
  $element['#type'] = 'select';
  $element['#options'] = $options;

  drupal_set_message("fb_form processed " . dpr($orig, 1) . " into " . dpr($element, 1));
  return $element;
}

function friend_selector_value(&$form) {
  drupal_set_message("friend_selector_value" . dpr($form, 1));
}

// TODO: provide some alternative when NOT a facebook app.
function theme_friend_selectorXXX($fbu = NULL) {
  drupal_set_message ("theme_friend_selector");
  if (!$fbu)
    $fbu = fb_facebook_user();

  $output = "<fb:friend-selector uid=\"$fbu\" name=\"fbname\" idname=\"fbu\" />";
  return $output;
}
?>