<?php
// $Id: user_relationship_invites.module,v 1.3 2007-10-03 19:49:58 jbchristy Exp $

/**
 * Drupal Module: User Relationship Invites
 *
 * @author: Jeff Smick <sprsquish [at] gmail [dot] com>
 * @file
 * Automatically create a relationship between inviter and invitee
 */

/**
 * Public API to grab the basic invite info
 *
 * @param $code
 *    string of the invite code
 *
 * @return
 *    object with the invite data including the inviter user object and relationship_type object
*/
function user_relationship_invites_get_invite($code) {
  if ($invite = db_fetch_object(db_query("SELECT * FROM {user_relationship_invites} WHERE invite_code = '%s'", $code))) {
    $invite->inviter = user_load(array('uid' => $invite->inviter_uid));
    $invite->relationship_type = user_relationships_relationship_type_load(array('rtid' => $invite->rtid));
  }

  return $invite;
}

/**
 * Implements hook_form_alter()
*/
function user_relationship_invites_form_alter($form_id, &$form) {
  if (!(module_exists('invite') && module_exists('user_relationships'))) {
    return;
  }

  global $form_values;
  global $user;

  switch ($form_id) {
  case 'user_register':
    if (($code = arg(2)) && ($invite = user_relationship_invites_get_invite($code))) {
      $inviter           =& $invite->inviter;
      $relationship_type =& $invite->relationship_type;

      // approval is required so ask for it
      if (!$relationship_type->is_oneway || !$relationship_type->requires_approval) {
        $form['relationship_invite_approve'] = array(
          '#type'           => 'radios',
          '#title'          => t('Are you a %relationship_name of !name?', array(
                                  '!name' => theme('username', $inviter), 
                                  '%relationship_name' => $relationship_type->name)
                                ),
          '#default_value'  => (isset($form_values['relationship_invite_approve']) ? $form_values['relationship_invite_approve'] : 'approve'),
          '#options'        => array('approve' => t('Yes'), 'disapprove' => t('No'))
        );
      }
      // otherwise force an approval
      else {
        $form['relationship_invite_approve'] = array(
          '#type'   => 'value',
          '#value'  => 'approve',
        );
      }

      $form['relationship_invite_requester'] = array(
        '#type'   => 'value',
        '#value'  => $inviter,
      );
      $form['relationship_type'] = array(
        '#type'   => 'value',
        '#value'  => $relationship_type,
      );
      $form['invite_code'] = array(
        '#type'   => 'value',
        '#value'  => $code,
      );
    }
    break;

  case '_invite_form':
    if ($form['invite_form']) {
      $user = user_load(array('uid' => $user->uid));
      $new_user = drupal_anonymous_user();
      $form['invite_form'] += user_relationships_request_form($user, $new_user, $form_values);
    }
    break;
  }
}

/**
 * Implements hook_invite()
*/
function user_relationship_invites_invite($action, &$args) {
  global $form_values;

  switch ($action) {
  case 'invite':
    db_query(
      "INSERT INTO {user_relationship_invites} (`inviter_uid`, `rtid`, `invite_code`) VALUES (%d, %d, '%s')", 
      $args['inviter']->uid, $form_values['rtid'], $args['code']
    );
    break;
  }
}

/**
 * Implements hook_user()
*/
function user_relationship_invites_user($type, &$edit, &$account, $category = NULL) {
  if (!(module_exists('invite') && module_exists('user_relationships'))) {
    return;
  }

  switch($type) {
  case 'insert':
    if (isset($edit['relationship_invite_approve'])) {
      db_query("DELETE FROM {user_relationship_invites} WHERE invite_code = '%s'", $edit['invite_code']);

      if ($edit['relationship_invite_approve'] == 'approve') {
        user_relationships_request_relationship($edit['relationship_invite_requester'], $account, $edit['relationship_type'], TRUE);
      }
    }
    break;
  }  
}