<?php
// $Id: node_invite.module,v 1.11 2009-09-01 19:00:13 hadsie Exp $
/**
 * @file
 * Provides the overall functionality for the node_invite module.
 * See also node_invite.rsvp.inc and node_invite.send.inc
 */

define('NODE_INVITE_RSVP_PAGE_SUBMIT_PRETEXT', 'Will you accept this invite?');
define('NODE_INVITE_RSVP_PAGE_TITLE', 'RSVP For: [title]');
define('NODE_INVITE_RSVP_PAGE_INTRO', "<h2>[inviter-name] at [site-name] has invited you to a [type] called [title]!</h2>\n<p>Use this form to confirm (or deny) attendance.</p>");
define('NODE_INVITE_MESSAGE_DEFAULT', '<p>[inviter-name] invites you to rsvp for a [type]!  </p><p> Visit <a href="[inviter-node-url]">[title]</a> for more information or just check out the <a href="[inviter-rsvp-url]">RSVP Page</a> to confirm your attendance!</p>');
define('NODE_INVITE_SUBJECT_DEFAULT', "[inviter-name] at [site-name] has invited you to a [type] called [title]!");
define('NODE_INVITE_NOTIFY_SITE_ADMIN_YES_SUBJECT', '[site-name] - Invite ACCEPT notification');
define('NODE_INVITE_NOTIFY_SITE_ADMIN_YES', 'An invite was accepted for node [nid]. Login to <a href="[site-url]">the site</a> to view it.');
define('NODE_INVITE_NOTIFY_SITE_ADMIN_ALL_SUBJECT', '[site-name] - Invite response notification');
define('NODE_INVITE_NOTIFY_SITE_ADMIN_ALL', 'An invite was acted upon for node [nid]. Login to <a href="[site-url]">the site</a> to view it.');
define('NODE_INVITE_NOTIFY_INVITEE_CONFIRM_SUBJECT', '[site-name] - Invite response confirmation');
define('NODE_INVITE_NOTIFY_INVITEE_CONFIRM', 'Your invite selection for [title] has been processed. Thanks!');
define('NODE_INVITE_NOTIFY_INVITER_NOTIFY_SUBJECT', '[site-name] - Invite response!');
define('NODE_INVITE_NOTIFY_INVITER_NOTIFY', 'Your invite selection for [title] has been acted upon. Please login to <a href="[site-url]/?q=user">the site</a> and click "Invites" to view it. Thanks!');

/* added to enable per-node override with a checkbox */
define('NODE_INVITE_DEFAULT_FOR_ENABLED_NODES', 1);

/**
 * Implementation of hook_help().
 */
function node_invite_help( $path, $arg ) {
  $output = '';
  switch ($path) {
    case 'admin/help/node_invite':
      $output .= t('<p>Node Invite Provides a means to invite people to nodes.  Customized email message is token enabled.</p>');
      $output .= t('<p>Here are tokens you can use:</p>');
      $output .= theme('token_help');
      break;
    case 'admin/settings/node_invite':
      $output .= '<p>Node invite allows you to invite people to nodes.  The email they receive is token-enabled.</p>';
      break;
  }
  return $output;
}

/**
 * Implementation of hook_perm().
 */
function node_invite_perm() {
  return array(
    'invite users to invite-enabled nodes',
    'admin node invite settings',
    'respond to invites',
    'manage all invites',
    'manage own invites',
  );
}

/**
 * Implementation of hook_menu().
 */
function node_invite_menu() {
  $items = array();

  $items['admin/settings/node_invite'] = array(
    'title' => t('Node Invite'),
    'description' => t('Node Invite module is similar to RSVP.  Invite people to nodes, manage your invites, etc.'),
    'access arguments' => array('admin node invite settings'),
    'page callback' => 'drupal_get_form',
    'page arguments' => array('node_invite_admin_settings_form'),
    'file' => 'node_invite.admin.inc',
  );
  $items['admin/settings/node_invite/settings'] = array(
    'title' => t('Settings'),
    'type'  => MENU_DEFAULT_LOCAL_TASK,
    'weight' => 0,
  );
  $items['admin/settings/node_invite/notifications'] = array(
    'title' => t('Notifications'),
    'type' => MENU_LOCAL_TASK,
    'access arguments' => array('admin node invite settings'),
    'page callback' => 'drupal_get_form',
    'page arguments' => array('node_invite_notifications_form'),
    'weight' => 1,
    'file' => 'node_invite.admin.inc',
  );
  $items['admin/settings/node_invite/manage'] = array(
    'title' => t('Manage Invites'),
    'type' => MENU_LOCAL_TASK,
    'access arguments' => array('manage all invites'),
    'page callback' => 'drupal_get_form',
    'page arguments' => array('user_invites_form'),
    'weight' => 2,
    'file' => 'node_invite.admin.inc',
  );
  $items['node_invite/invite/%'] = array(
    'title' => t('Invite'),
    'type' => MENU_CALLBACK,
    'access arguments' => array('invite users to invite-enabled nodes'),
    'page callback' => 'drupal_get_form',
    'page arguments' => array('node_invite_send', 2),
    'file' => 'node_invite.send.inc',
  );
  $items['node_invite/rsvp/%node/%'] = array(
    'title' => t('Invite'),
    'type' => MENU_CALLBACK,
    'access arguments' => array('respond to invites'),
    'page callback' => 'drupal_get_form',
    'page arguments' => array('node_invite_rsvp', 2, 3),
    'file' => 'node_invite.rsvp.inc',
  );
  $items['node_invite/revoke/%'] = array(
    'title' => t('Revoke'),
    'type' => MENU_CALLBACK,
    'access callback' => 'node_invite_access_revoke',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('node_invite_revoke', 2),
  );
  $items['node_invite/resend/%'] = array(
    'title' => t('Resend'),
    'type' => MENU_CALLBACK,
    'access callback' => 'node_invite_access_resend',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('node_invite_resend', 2),
  );
  $items['user/%user/invites'] = array(
    'title' => 'My Invites',
    'page callback' => 'node_invite_user_invites',
    'page arguments' => array(1),
    'type' => MENU_LOCAL_TASK,
    'access arguments' => array('manage own invites'),
    'weight' => 2,
  );
  /*
  $items['node_invite/resend'] = array(
    'title' => t('Invite'),
    'type' => MENU_CALLBACK,
    'access arguments' => array('invite users to invite-enabled nodes'),
    'page callback' => 'drupal_get_form',
    'page arguments' => array('node_invite_resend'),
  );
  */

  return $items;
}

/**
 * Implementation of hook_link().
 */
function node_invite_link( $type, $node = NULL, $teaser = FALSE ) {
  global $user;
  $links = array();

  if ($type == 'node' && _node_invite_type_is_allowed($node->type) && user_access('invite users to invite-enabled nodes') && _ni_node_is_enabled($node->nid)) {
    $links['node_invite'] = array(
      'title' => t('Invite people to this @type', array('@type' => $node->type)),
      'href' => "node_invite/invite/$node->nid",
    );
  }

  return $links;
}

function _ni_node_is_enabled( $nid ) {
  $sth = db_query("SELECT invites_enabled FROM {node_invite_settings} WHERE nid = %d", $nid);

  $enabled = variable_get('node_invite_default', NODE_INVITE_DEFAULT_FOR_ENABLED_NODES);

  if ($row = db_fetch_array($sth)) {
    // if there's a row in the table, then they're being explicit... override the default
    $enabled = $row['invites_enabled'];
  }

  return $enabled;
}

function _node_invite_type_is_allowed( $type ) {
  if ( in_array( $type, variable_get('node_invite_node_types', array() ), TRUE ) ) {
    return TRUE;
  }
  return FALSE;
}

/**
 * Implementation of hook_mail().
 */
function node_invite_mail( $key, &$message, $params ) {
  $message['headers']['Content-Type'] = 'text/html; charset=UTF-8; format=flowed';
  $message['subject'] = $params['subject'];
  $message['body'] = $params['body'];
}

/**
 * Implementation of hook_token_values().
 */
function node_invite_token_values($type, $object = NULL) {
  $values = array();
  if (in_array($type, array('all', 'node_invite', 'node'))) {
    global $user;
    $values['inviter-name'] = $user->name;
    $values['inviter-mail'] = $user->mail;
    $values['inviter-rsvp-url'] = url('node_invite/invite/' . $object->nid, array('absolute' => TRUE));
    $values['inviter-node-url'] = url('node/' . $object->nid, array('absolute' => TRUE));

    // this is hacked in for each invite sent.  Won't exist other times
    if (isset($object->invite_specific_info)) {
      $values['node-invite-iid'] = $object->invite_specific_info['node-invite-iid'];
      $values['node-invite-recip-name'] = $object->invite_specific_info['node-invite-recip-name'];
      $values['node-invite-recip-mail'] = $object->invite_specific_info['node-invite-recip-mail'];

      // the above were defaults... this comes in if alternatives are available
      $values['inviter-name'] = $object->invite_specific_info['inviter-name'];
      $values['inviter-mail'] = $object->invite_specific_info['inviter-mail'];
    }

    //drupal_set_message("Token values = <PRE>" . print_r( $values, TRUE ) . "</pre>");
  }
  return $values;
}

/**
 * Implementation of hook_token_list().
 */
function node_invite_token_list( $type='all') {
  /* global $user;
  drupal_set_message("<PRE>" . sprint_r( $user )  . "</pre>"); */
  $tokens = array();
  if (in_array($type, array('all', 'node_invite', 'node'))) {
    $tokens['node_invite']['inviter-name'] = t('The username of the person currently logged in (and thus sending the invite). This will not work as a page-title token since the person rendering the page title will be logged in as someone different (or anonymous).');
    $tokens['node_invite']['inviter-mail'] = t('The email address of the person currently logged in (and thus sending the invite).  This will not work as a page-title token since the person rendering the page title will be logged in as someone different (or anonymous).');
    $tokens['node_invite']['inviter-rsvp-url'] = t('This is the URL of the RSVP form. Send users here to confirm or deny attendance.');
    $tokens['node_invite']['inviter-node-url'] = t('This is the URL of the node to which they are being invited.  Send them here "for more details."');
    $tokens['node_invite']['node-invite-recip-mail'] = t('The email of the person receiving the invite');
    $tokens['node_invite']['node-invite-recip-name'] = t('The name of the person receiving the invite');
    $tokens['node_invite']['node-invite-iid'] = t('The invite_id (unique identifier) of the invite being sent');
  }
  return $tokens;
}

/**
 * Implementation of hook_content_extra_fields().
 */
function node_invite_content_extra_fields($type_name) {
  $extra = array();
  if (_node_invite_type_is_allowed($type_name)) {
    $extra['node_invite_group'] = array(
      'label' => t('Node invite settings'),
      'description' => t('Node invite module form.'),
      'weight' => 10,
    );
  }
  return $extra;
}

function node_invite_user_invites( $account ) {
  $headers = _node_invite_user_invites_headers();
  $q = db_query("
    SELECT
      iid,
      ni.nid,
      email_invitee,
      uid_inviter,
      ni.status,
      ni.sent,
      acted_upon,
      notes_invitee,
      notes_inviter,
      n.title,
      u.name
    FROM
      {node_invites} AS ni
      JOIN {node} AS n
        ON ni.nid = n.nid
      JOIN {users} AS u
        ON ni.uid_inviter = u.uid
    WHERE
      uid_inviter = %d
    " . tablesort_sql($headers) . "
  ", $account->uid );

  $destination = drupal_get_destination();

  $rows = array();
  while ( $data = db_fetch_array($q) ) {
    $row = array();
    $row[] = $data['title'];
    $row[] = check_plain($data['email_invitee']);

    if ( user_access('manage all invites') ) {
      $row[] = $data['name'];
    }

    $row[] = date('m/d/Y g:i a', $data['sent'] );
    $row[] = $data['status'];
    $row[] = $data['acted_upon'] ? date('m/d/Y g:i a', $row['acted_upon']) : '&nbsp;';

    if ( $row['status'] != 'Yes' && $row['status'] != 'Revoked' && _node_invite_can_manage_this_invite($data['iid']) ) {
      $row[] = l('Revoke', 'node_invite/revoke/' . $data['iid'], array('query' => $destination));
      $row[] = l('Resend', 'node_invite/resend/' . $data['iid'], array('query' => $destination));
    }

    $rows[] = $row;
  }

  return theme('table', $headers, $rows);
}

function _node_invite_user_invites_headers() {
  $headers = array();
  $headers[] = array(
    'data' => 'What',
    'field' => 'title',
  );
  $headers[] = array(
    'data' => 'Sent to',
    'field' => 'email_invitee',
  );
  if ( user_access('manage all invites') ) {
    $headers[] = array(
      'data' => 'Sent by',
      'field' => 'name',
    );
  }
  $headers[] = array(
    'data' => 'Invite Sent',
    'field' => 'sent',
  );
  $headers[] = array(
    'data' => 'Status',
    'field' => 'status',
  );
  $headers[] = array(
    'data' => 'Acted Upon',
    'field' => 'acted_upon',
  );

  return $headers;
}

function _node_invite_can_manage_this_invite( $iid ) {
  global $user;

  $sth = db_query( "SELECT uid_inviter FROM {node_invites} WHERE iid = %d", $iid );
  if ( $row = db_fetch_array($sth) ) {
    if ( ( $row['uid_inviter'] == $user->uid ) && user_access('manage own invites')) {
      return TRUE;
    }
    elseif ( user_access('manage all invites') ) {
      return TRUE;
    }
  }
  return FALSE;
}

function node_invite_access_revoke() {
  return TRUE;
}

function node_invite_access_resend() {
  return TRUE;
}

function node_invite_revoke($form_state, $iid) {
  // ask for confirmation that they really want to revoke the invite.
  if ( !intval($iid) ) {
    drupal_set_message("$iid is not a number. This form should only be called with a invite-id as the 3rd argument in the URL.", 'error');
    return;
  }

  if (_node_invite_can_manage_this_invite($iid)) {
    $form['iid'] = array(
      '#type' => 'value',
      '#value' => $iid,
    );
    $form['referer'] = array(
      '#type' => 'hidden',
      '#value' => $_GET['destination'],
    );
    return confirm_form( $form, 'Are you sure you wish to revoke this invite?', $_GET['destination'] );
  }
  else {
    drupal_set_message('Access denied', 'error');
    return;
  }
}

function node_invite_revoke_submit( $form, &$form_state ) {
  db_query("UPDATE {node_invites} SET status = '%s', acted_upon = %d WHERE iid = %d", 'Revoked', time(), $form_state['values']['iid']);

  drupal_goto($form_state['values']['referer']);
}

function node_invite_resend($form_state, $iid) {
  // ask for confirmation that they really want to revoke the invite.
  if ( !intval($iid) ) {
    drupal_set_message("$iid is not a number.  This form should only be called with a invite-id as the 3rd argument in the URL.", 'error');
    return;
  }

  if (_node_invite_can_manage_this_invite($iid)) {
    $form['iid'] = array(
      '#type' => 'value',
      '#value' => $iid,
    );
    $form['referer'] = array(
      '#type' => 'hidden',
      '#value' => $_GET['destination'],
    );
    return confirm_form($form, 'Are you sure you wish to resend this invite?', $_GET['destination']);
  }
  else {
    drupal_set_message('Access denied', 'error');
    return;
  }
}

function node_invite_resend_submit($form, &$form_state) {
  db_query("UPDATE {node_invites} SET status = '%s', acted_upon = NULL WHERE iid = %d", 'NEW', time(), $form_state['values']['iid']);

  $q = db_query("SELECT ni.*, u.mail FROM {node_invites} AS ni JOIN {users} AS u ON ni.uid_inviter = u.uid WHERE iid = %d", $form_state['values']['iid']);
  if ($row = db_fetch_array($q)) {
    $default_message = variable_get('node_invite_message_default', NODE_INVITE_MESSAGE_DEFAULT);
    $node = node_load($row['nid']);
    $inviter_rsvp_url = url('node_invite/rsvp/' . $row['nid'] . '/' . $row['iid'], array('absolute' => TRUE));
    $new_default_message = str_replace("[inviter-rsvp-url]", $inviter_rsvp_url, $default_message);
    $replaced_message = token_replace($new_default_message, 'node', $node);
    $subj = token_replace(
      variable_get('node_invite_subject_default', NODE_INVITE_SUBJECT_DEFAULT),
      'node',
      $node
    );

    $msg = drupal_mail(
      // module
      'node_invite',
      // key
      'invite',
      // to
      $row['email_invitee'],
      // language
      language_default(),
      // params
      array(
        'subject' => $subj,
        'body'    => $replaced_message,
      ),
      // from
      $row['mail'],
      // send
      TRUE
    );
  }
  else {
    drupal_set_message('Unable to fetch information about this invite. Resend failed.', 'error');
  }


  drupal_goto($form_state['values']['referer']);
}
function user_invites_form() {
  global $user;
  $uid_inviter = $user->uid;

  drupal_add_css(drupal_get_path('module', 'node_invite') . '/node_invite.css', 'module', 'all', TRUE);

  // 1. Who is this?  (we're showing their stuff only, right?)
  // 2. Get their invites (where uid_inviter == $user->uid
  // 3. Make a table of results
  // 4. Provide ajax(?) text links to alter status of invites
  // 5. Provide csv export(?)

  $form['ni_ui_intro'] = array(
    '#value' => '<p>This form allows you to manage those invites you\'ve sent out.</p>',
  );

  $statement = "
                SELECT
                        iid
                        ,ni.nid
                        ,email_invitee
                        ,uid_inviter
                        ,ni.status
                        ,ni.sent
                        ,acted_upon
                        ,notes_invitee
                        ,notes_inviter
                        ,n.title
                        ,u.name
                FROM
                        {node_invites} as ni
                        ,{node} as n
                        ,{users} as u
                WHERE
                        uid_inviter = $uid_inviter
                        AND n.nid = ni.nid
                        AND u.uid = ni.uid_inviter
        ";
  $sort_fields = _ni_sort_order_determine();
  $statement .= "
                ORDER BY
                        " . $sort_fields['field'] . ' ' . $sort_fields['order'] . "
                        , iid DESC
        ";
  $sth = db_query($statement);

  $table_output = "
                <table id='invites_form_table'>
                        <tr id='invites_form_header'>
                                <th class='invites_form_header_th'><a href='" . url($sort_fields['existing_url'] . '/title/' . $sort_fields['order_new'] ) . "'>What</a></th>
                                <th class='invites_form_header_th'><a href='" . url($sort_fields['existing_url'] . '/email_invitee/' . $sort_fields['order_new'] ) . "'>Sent to</a></th>
        ";

  // if this is someone who can manage ALL then add a column for who sent it.
  if (user_access('manage all invites')) {
    $table_output .= "
                                <th class='invbites_form_header_th'><a href='" . url($sort_fields['existing_url'] . '/sent/' . $sort_fields['order_new'] ) . "'>Sent by</a></tH>
                ";
  }


  $table_output .= "
                                <th class='invites_form_header_th'><a href='" . url($sort_fields['existing_url'] . '/sent/' . $sort_fields['order_new'] ) . "'>Invite Sent</a></th>
                                <th class='invites_form_header_th'><a href='" . url($sort_fields['existing_url'] . '/status/' . $sort_fields['order_new'] ) . "'>Status</a></th>
                                <th class='invites_form_header_th'><a href='" . url($sort_fields['existing_url'] . '/acted_upon/' . $sort_fields['order_new'] ) . "'>Acted Upon</a></th>
                                <th class='invites_form_header_th' colspan=2 id='invites_form_header_actions_th'>Actions</tH>
                        </tr>
        ";
  $counter = 0;
  while ($row = db_fetch_array($sth)) {
    $counter++;

    // format the "actued upon" date field
    if ($row['acted_upon'] == '' ) {
      $acted_upon = '';
    }
    else {
      $acted_upon = date('m/d/Y g:i a', $row['acted_upon']);
    }

    // zebra stripes
    $trclass = 'odd';
    if ( $counter % 2 == 0 ) {
      $trclass = 'even';
    }


    // add a row to the table.
    $table_output .= "
                        <tr class=$trclass>
                                <td>" . $row['title'] . "</td>
                                <td>" . $row['email_invitee'] . "</td>
                ";

    // if they can manage all, show who sent it
    if (user_access('manage all invites')) {
      $table_output .= "
                                <td>" . $row['name'] . "</td>
                        ";
    }

    $table_output .= "
                                <td>" . date('m/d/Y g:i a', $row['sent'] ) . "</td>
                                <td>" . $row['status'] . "</td>
                                <td>$acted_upon</td>
                ";
    // can they revoke/resend this invite? (depends on perms too...farm that out)
    if ($row['status'] != 'Yes' && $row['status'] != 'Revoked' && _ni_can_manage_this_invite($row['iid'])) {
      $table_output .="
                                <td><a href='" . url( 'node_invite/revoke/' . $row['iid'] ) . "'>Revoke</a></td>
                        ";
      $table_output .="
                                <td><a href='" . url( 'node_invite/resend/' . $row['iid'] ) . "'>Resend</a></td>
                        ";
    }
    else {
      $table_output .= "
                                <td class='node_invite_greyed_out'>Revoke</td>
                                <td class='node_invite_greyed_out'>Resend</td>";
    }
    $table_output .= "
                        </tr>
                ";

  }
  $table_output .= "
                </table>";

  $form['ni_ui_table'] = array(
    '#value' => $table_output,
  );

  return $form;
}

function _ni_can_manage_this_invite( $iid ) {
  global $user;
  $sth = db_query("SELECT uid_inviter FROM {node_invites} WHERE iid = %d", $iid);
  if ($row = db_fetch_array($sth)) {

    if (($row['uid_inviter'] == $user->uid ) && user_access('manage own invites')) {
      return TRUE;
    }
    elseif (user_access('manage all invites')) {
      return TRUE;
    }
  }
  return FALSE;
}

function _ni_sort_order_determine() {
  global $user;

  // defaults
  $sort_fields = array(
    'field' => 'sent',
    'order' => '',
    'order_new' => 'DESC',
    'existing_url' => '',
  );

  // what fields can we sort by?
  $acceptable_sort_fields = array('iid', 'email_invitee', 'sent', 'status', 'title', 'name', 'acted_upon');

  // path will be of 2 formats:
  //    A. user/$nid/invites/sort_field/sort_order
  if ( ( arg(0) == 'user') && ( arg(2) == 'invites' ) ) {
    if ( in_array( arg(3), $acceptable_sort_fields ))  {
      $sort_fields['field'] = arg(3);
    }
    if ( arg(4) == 'DESC') {
      $sort_fields['order'] = 'DESC';
      $sort_fields['order_new'] = '';
    }
    $sort_fields['existing_url'] = 'user/' . $user->uid . '/invites';
  }
  //    B. admin/settings/node_invite/manage/sort_field/sort_order
  elseif (arg(0) == 'admin' && arg(1) == 'settings' && arg(2) =='node_invite' && arg(3) == 'manage') {
    if (in_array(arg(4), $acceptable_sort_fields))  {
      $sort_fields['field'] = arg(4);
    }
    if (arg(5) == 'DESC') {
      $sort_fields['order'] = 'DESC';
      $sort_fields['order_new'] = '';
    }
    else {
      $sort_fields['order'] = '';
      $sort_fields['order_new'] = 'DESC';
    }
    $sort_fields['existing_url'] = 'admin/settings/node_invite/manage';

  }
  else {
    drupal_set_message("_ni_sort_order_determine called with weird args.", 'error');
  }

  return $sort_fields;
}

function node_invite_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL) {
  // decides whether or not to enable disable invites for this node.
  if ($op == 'load') {
    $node->node_invites_enabled = _ni_node_is_enabled($node->nid);
  }
  elseif ($op == 'update' || $op == 'insert') {
    if (!isset($node->node_invites_enabled)) {
      drupal_set_message("had to get defaults for node->node_invites_enabled");
      $node->node_invites_enabled = _ni_node_is_enabled($node->nid);
    }

    $sth = db_query("DELETE FROM {node_invite_settings} WHERE nid = %d", $node->nid);
    $sth = db_query("INSERT INTO {node_invite_settings} (nid, invites_enabled, subject, message) VALUES (%d, %d, '%s', '%s')", $node->nid, $node->node_invites_enabled, $node->node_invite_subject_override, $node->node_invite_message_override);
  }
}

function node_invite_form_alter(&$form, &$form_state, $form_id) {
  $matches = array();
  if ( preg_match("/(.+)_node_form$/", $form_id, $matches) && _node_invite_type_is_allowed( $matches[1] ) ) {
    // put in a form element for node_invite

    // figure out whether or not to check the box
    // if this is "edit an existing node"
    $node = isset( $form['#node'] ) ? $form['#node'] : NULL;
    $enabled = variable_get('node_invite_default', NODE_INVITE_DEFAULT_FOR_ENABLED_NODES);
    if (isset($node->node_invites_enabled)) {
      $enabled = $node->node_invites_enabled;
    }

    // grab the default message/subject (if they exist)
    // only if node isn't new (DUH)
    $node_invite_subject = $node_invite_message = '';
    if (isset($node->nid)) {
      $statement = "SELECT COUNT(*) as the_count FROM {node_invite_settings} WHERE nid=" . $node->nid;
      $ni_counter_sth = db_query($statement);
      $ni_counter_row = db_fetch_array($ni_counter_sth);
      if ($ni_counter_row['the_count'] > 0) {
        $ni_sth = db_query("SELECT * FROM {node_invite_settings} WHERE nid = %d", $node->nid);
        $ni_row = db_fetch_array($ni_sth);
        $node_invite_subject = $ni_row['subject'];
        $node_invite_message = $ni_row['message'];
      }
    }

    // add a form element to override
    $form['node_invite_group'] = array(
      '#type' => 'fieldset',
      '#title' => t('Node Invite'),
      '#weight' => 0,
      '#collapsed' => TRUE,
      '#collapsible' => TRUE,
      '#description' => t('Set invite settings for this specific node here.'),
    );
    $form['node_invite_group']['node_invites_enabled'] = array(
      '#type' => 'radios',
      '#title' => t('Enable invites for this node'),
      '#options' => array(
        '1' => t('Yes'),
        '0' => t('No'),
      ),
      '#default_value' => $enabled,
    );
    $form['node_invite_group']['node_invite_subject_override'] = array(
      '#type' => 'textfield',
      '#title' => t('Override default subject?'),
      '#description' => t('Leave this textarea BLANK to use the site-default invite subject.'),
      '#default_value' => $node_invite_subject,
    );
    $form['node_invite_group']['node_invite_message_override'] = array(
      '#type' => 'textarea',
      '#title' => t('Override default message?'),
      '#description' => t('Leave this textarea BLANK to use the site-default invite message.'),
      '#default_value' => $node_invite_message,
    );
    $form['node_invite_group']['node_invite_token_wrapper'] = array(
      '#type' => 'fieldset',
      '#description' => theme_token_help('node'),
      '#collapsible' => TRUE,
      '#collapsed' => TRUE,
      '#title' => t('Available Tokens'),
    );
  }
}