<?php
// $Id: user_relationship_defaults.module,v 1.2 2007-08-23 14:08:37 sprsquish Exp $

/**
 * Drupal Module: User Relationship Defaults
 *
 * @author: Jeff Smick <sprsquish [at] gmail [dot] com>
 * @file
 * Automatically create a relationship when a new user joins
 */


/**
 * Public API for retrieving a default relationship.
 *
 * @param $rdid
 *   integer of the default relationship id
 *
 * @return
 *   object of the default relationship with the user object and relationship_type object
 * 
*/
function user_relationship_defaults_load($rdid) {
  $default = db_fetch_object(db_query("SELECT * FROM {user_relationship_defaults} WHERE rdid = %d", $rdid));

  $default->user              = user_load(array('uid' => $default->uid));
  $default->relationship_type = user_relationships_relationship_type_load(array('rtid' => $default->rtid));

  return $default;
}

/**
 * Public API to retrieve the full list of default relationships
 *
 * @return
 *    array of default relationship objects
 */
function user_relationship_defaults_relationships_load() {
  $results = db_query("SELECT * FROM {user_relationship_defaults}");

  $defaults = array();
  while ($default = db_fetch_object($results)) {
    $default->user              = user_load(array('uid' => $default->uid));
    $default->relationship_type = user_relationships_relationship_type_load(array('rtid' => $default->rtid));

    $defaults[] = $default;
  }

  return $defaults;
}


/**
 * hook_menu()
 */
function user_relationship_defaults_menu($may_cache) {
  $items = array();

  if ($may_cache) {
    $items[] = array(
      'path'                => 'admin/user/relationships/defaults/add',
      'title'               => t('Add default'),
      'callback'            => 'drupal_get_form',
      'callback arguments'  => array('user_relationship_defaults_add_form'),
      'access'              => user_access('administer user relationships'),
      'type'                => MENU_LOCAL_TASK,
      'weight'              => 2
    );
  }
  else {
    $items[] = array(
      'path'                => 'admin/user/relationships/defaults/delete',
      'title'               => t('Delete default'),
      'callback'            => 'drupal_get_form',
      'callback arguments'  => array('user_relationship_defaults_delete_form', arg(5)),
      'access'              => user_access('administer user relationships'),
      'type'                => MENU_CALLBACK,
    );
  }

  return $items;
}

/**
 * Add new default relationship form
 */
function user_relationship_defaults_add_form() {
  $form['username'] = array(
    '#type'               => 'textfield',
    '#title'              => t('Username'),
    '#maxlength'          => 255,
    '#default_value'      => $edit['username'],
    '#description'        => t('Start typing the name of a user to automatically create a relationship to'),
    '#required'           => TRUE,
    '#autocomplete_path'  => 'user/autocomplete',
  );
  $form['relationship_type_name'] = array(
    '#type'               => 'textfield',
    '#title'              => t('Relationship'),
    '#maxlength'          => 255,
    '#default_value'      => $edit['relationship_type_name'],
    '#description'        => t('Start typing the name of a relationship to use'),
    '#required'           => TRUE,
    '#autocomplete_path'  => 'relationship_types/autocomplete',
  );
  $form['submit'] = array(
    '#type'   => 'submit',
    '#value'  => t('Submit'),
  );

  return $form;
}

/**
 * Validate the default relationship add page form submission.
 */
function user_relationship_defaults_add_form_validate($form_id, &$form_values) {
  if(!empty($form_values['username']) && !user_load(array('name' => $form_values['username']))) {
    form_set_error('username', t("You must enter an existing user's name."));
  }

  if (!empty($form_values['relationship_name'])) {
    if (!user_relationships_load_relationship_type(array('name' => $form_values['relationship_name']))) {
      form_set_error('relationship_name', t("You must enter an existing relationship's name."));
    }
  }
}

/**
 * Process default relationship add form submission.
 */
function user_relationship_defaults_add_form_submit($form_id, &$form_values) {
  $user               = user_load(array('name' => $form_values['username']));
  $relationship_type  = user_relationships_relationship_type_load(array('name' => $form_values['relationship_type_name']));

  db_query(
    "INSERT INTO {user_relationship_defaults} (rdid, uid, rtid) VALUES (%d, %d, %d)", 
    db_next_id('{user_relationship_defaults}_id'), $user->uid, $relationship_type->rtid
  );
  $message = t('Default relationship %relationship_name of %username has been added.', array(
    '%username'           => $user->name,
    '%relationship_name'  => $relationship_type->name,
  ));
  drupal_set_message($message);
  watchdog('userreltnships', $message, WATCHDOG_NOTICE, l(t('view'), 'admin/user/relationships'));

  return 'admin/user/relationships';
}


/**
 * Default Relationship delete confirmation.
 */
function user_relationship_defaults_delete_form($rdid = NULL) {
  if (isset($rdid) && ($default_relationship = user_relationship_defaults_load($rdid))) {
    $form['rdid'] = array(
      '#type'   => 'value',
      '#value'  => $rdid
    );
    $form['user'] = array(
      '#type'   => 'value',
      '#value'  => $default_relationship->user,
    );
    $form['relationship_type'] = array(
      '#type'   => 'value',
      '#value'  => $default_relationship->relationship_type,
    );

    $form = confirm_form(
      $form, 
      t('Are you sure you want to delete the default relationship %relationship of %name?', array(
        '%relationship' => $default_relationship->relationship_type->name,
        '%name'         => $default_relationship->user->name,
      )), 
      'admin/user/relationships', 
      t('This action cannot be undone.'),
      t('Delete'), t('Cancel')
    );

    return $form;
  }
  else {
    drupal_set_message(t('Default relationship not found.'), 'error');
    drupal_goto('admin/user/relationships');
  }
}

/**
 * Process default relationship delete form submission.
 */
function user_relationship_defaults_delete_form_submit($form_id, &$form_values) {
  db_query("DELETE FROM {user_relationship_defaults} WHERE rdid = %d", $form_values['rdid']);
  $message = t('Default relationship %relationship of %name has been deleted.', array(
    '%name'         => $form_values['user']->name,
    '%relationship' => $form_values['relationship_type']->name,
  ));

  drupal_set_message($message);
  watchdog('userreltnships', $message, WATCHDOG_NOTICE);

  return 'admin/user/relationships';
}

/**
 * hook_user()
 */
function user_relationship_defaults_user($type, &$edit, &$account, $cagetory = NULL) {
  switch($type) {
  case 'insert':
    if ($defaults = user_relationship_defaults_relationships_load()) {
      foreach($defaults as $default) {
        user_relationships_request_relationship($default->user, $account, $default->relationship_type, TRUE);
      }
    }
    break;
  }
}

/**
 * hook_user_relationships_admin_page_alter()
 */
function user_relationship_defaults_user_relationships_page_alter($page_id, &$page, &$current_table) {
  switch ($page_id) {
  case 'types list':
    $defaults = user_relationship_defaults_relationships_load();

    $default_rows = array();    
    foreach($defaults as $default) {
      $default_rows[] = array(
        theme('username', $default->user),
        $default->relationship_type->name, 
        l(t('delete'), "admin/user/relationships/defaults/delete/$default->rdid"),
      );
    }

    if (sizeof($default_rows) <= 0) {
      $default_rows[] = array(array('data' => t('No default relationships available.'), 'colspan' => 3));
    }

    $page['defaults'] = array(
      '#type'   => 'fieldset',
      '#title'  => t('Default Relationships'),
      '#weight' => 2
    );
      $page['defaults']['list'] = array(
        '#value' => theme('table', array(t('User'), t('Relationship'), t('Operations')), $default_rows)
      );
    break;
  }
}

/**
 * hook_user_relationships()
 */
function user_relationship_defaults_user_relationships($op, &$relationship_type) {
  switch ($op) {
  case 'delete type':
    db_query("DELETE FROM {user_relationship_defaults} WHERE rtid = %d", $relationship_type->rtid);
    break;
  }
}