<?php

/**
 * Drupal Module: User Relationship Defaults
 *
 * @author Jeff Smick (creator)
 * @author Alex Karshakevich (maintainer) http://drupal.org/user/183217
 * @file
 * Automatically create a relationship when a new user joins
 */


/**
 * Public API for retrieving a default relationship.
 *
 * @param $param
 *    The rdid or an associative array of attributes to search for in selecting the
 *    default, such as user_name or name. Attributes must match column names
 *    in the user_relationship_defaults or user_relationship_types table.
 *
 * @return
 *   object of the default relationship with the user object and relationship_type object
 *
 */
function user_relationship_default_load($param = array()) {
  $defaults = user_relationship_defaults_load();

  if (is_numeric($param)) {
    return $defaults[$param];
  }

  foreach ($defaults as $default) {
    $found = TRUE;

    foreach ($param as $column => $value) {
      $column = drupal_strtolower($column);

      if ($column == 'name' || $column == 'plural_name') {
        $value = drupal_strtolower($value);
        $col_val = drupal_strtolower($default->$column);
      }
      else {
        $col_val = $default->$column;
      }

      // mismatch, move to the next type
      if ($col_val != $value) {
        $found = FALSE;
        break;
      }
    }

    if ($found) {
      return $type;
    }
  }
}

/**
 * Public API to retrieve the full list of default relationships.
 *
 * @return
 *    array of default relationship objects
 */
function user_relationship_defaults_load($reset = FALSE) {
  static $defaults = array();

  if ($reset || !$defaults) {
    $result = db_query("SELECT * FROM {user_relationship_defaults}");
    foreach ($result as $default) {
      $default->user              = user_load($default->uid);
      $default->user_name         = $default->user->name;
      $default->relationship_type = user_relationships_type_load($default->rtid);

      // Ignore default if relationship type does not exist.
      if (empty($default->relationship_type)) {
        continue;
      }

      foreach ((array) $default->relationship_type as $column => $value) {
        $default->$column = $value;
      }

      $defaults[$default->rdid] = $default;
    }
  }

  return $defaults;
}


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

  $items['admin/config/people/relationships/defaults/add'] = array(
    'title'             => 'Add default relationship',
    'access arguments'  => array('administer user relationships'),
    'page callback'     => 'drupal_get_form',
    'page arguments'    => array('user_relationship_defaults_add_form'),
    'type'              => MENU_LOCAL_ACTION,
    'weight'            => 2
  );
  $items['admin/config/people/relationships/defaults/%user_relationship_default/delete'] = array(
    'title'             => 'Delete default',
    'access arguments'  => array('administer user relationships'),
    'page callback'     => 'drupal_get_form',
    'page arguments'    => array('user_relationship_defaults_delete_form', 5),
    'type'              => MENU_CALLBACK,
  );

  return $items;
}

/**
 * Add new default relationship form.
 */
function user_relationship_defaults_add_form($form, &$form_state) {
  $form['username'] = array(
    '#type'               => 'textfield',
    '#title'              => t('Username'),
    '#maxlength'          => 255,
    '#default_value'      => isset($form_state['username']) ? $form_state['username'] : NULL,
    '#description'        => t('Start typing the name of a user to automatically create a relationship to'),
    '#required'           => TRUE,
    '#autocomplete_path'  => 'user/autocomplete',
  );
  $form['relationship_type_name'] = array(
    '#type'               => 'textfield',
    '#title'              => t('Relationship'),
    '#maxlength'          => 255,
    '#default_value'      => isset($form_state['relationship_type_name']) ? $form_state['relationship_type_name'] : NULL,
    '#description'        => t('Start typing the name of a relationship to use'),
    '#required'           => TRUE,
    '#autocomplete_path'  => 'admin/user_relationships/autocomplete/types',
  );
  $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($form, &$form_state) {
  $users = user_load_multiple(array(), array('name' => $form_state['values']['username']));
  if (!empty($form_state['values']['username']) && empty($users)) {
    form_set_error('username', t("You must enter an existing user's name."));
  }

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

/**
 * Process default relationship add form submission.
 */
function user_relationship_defaults_add_form_submit($form, &$form_state) {
  $user               = array_shift(user_load_multiple(array(), array('name' => $form_state['values']['username'])));
  $relationship_type  = user_relationships_type_load(array('name' => $form_state['values']['relationship_type_name']));

  $new_default = array(
    'uid'   => $user->uid,
    'rtid'  => $relationship_type->rtid,
  );
  drupal_write_record('user_relationship_defaults', $new_default);

  $message_p = array(
    '%username'           => $user->name,
    '%relationship_name'  => user_relationships_type_get_name($relationship_type),
  );
  drupal_set_message(t('Default relationship %relationship_name of %username has been added.', $message_p));
  watchdog('u_relationship', 'Default relationship %relationship_name of %username has been added.', $message_p, WATCHDOG_NOTICE, l(t('view'), 'admin/config/people/relationships'));

  $form_state['redirect'] = 'admin/config/people/relationships';
}


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

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

  return $form;
}

/**
 * Process default relationship delete form submission.
 */
function user_relationship_defaults_delete_form_submit($form, &$form_state) {
  $default_relationship = user_relationship_default_load($form_state['values']['rdid']);

  db_delete('user_relationship_defaults')
    ->condition('rdid', $default_relationship->rdid)
    ->execute();
  $message_p = array(
    '%name'         => $default_relationship->user_name,
    '%relationship' => user_relationships_type_get_name($default_relationship),
  );
  drupal_set_message(t('Default relationship %relationship of %name has been deleted.', $message_p));
  watchdog('u_relationship', 'Default relationship %relationship of %name has been deleted.', $message_p, WATCHDOG_NOTICE);

  user_relationship_defaults_load(TRUE);

  $form_state['redirect'] = 'admin/config/people/relationships';
}

/**
 * Implements hook_user_insert().
 */
function user_relationship_defaults_user_insert(&$edit, $account) {
  if ($account->status) {
    _user_relationship_defaults_create_default_relationships($account);
  }
}

/**
 * Implements hook_user_update().
 */
function user_relationship_defaults_user_update(&$edit, $account) {
  if ($account->status && !$account->login) {
    _user_relationship_defaults_create_default_relationships($account);
  }
}

/**
 * Implements hook_user_delete().
 */
function user_relationship_defaults_user_delete($account) {
  db_delete('user_relationship_defaults')
    ->condition('uid', $account->uid)
    ->execute();
}

function _user_relationship_defaults_create_default_relationships($account) {
  //note that if a new account is approved, then blocked and unblocked before the user logged in once,
  //it'll attempt to create default relationships again (there won't be any errors if they already exist, though)
  $defaults = user_relationship_defaults_load();
  foreach ($defaults as $default) {
    user_relationships_request_relationship($default->user, $account, $default->relationship_type, TRUE);
  }
}

/**
 * hook_user_relationships_admin_page_alter()
 */
function user_relationship_defaults_user_relationships_types_list_alter(&$page) {
  $defaults = user_relationship_defaults_load();

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

  $page['defaults'] = array(
    '#type'   => 'fieldset',
    '#title'  => t('Default Relationships'),
    '#weight' => 2,
  );
  $page['defaults']['list'] = array(
    '#theme' => 'table',
    '#header' => array(t('Relationship type'), t('User'), t('Operations')),
    '#rows' => $default_rows,
    '#empty' => t('No default relationships available.'),
  );
}

/**
 * hook_user_relationships()
 */
function user_relationship_defaults_user_relationships_type_delete($relationship_type) {
  db_delete('user_relationship_defaults')
    ->condition('rtid', $relationship_type->rtid)
    ->execute();
}