<?php
// $Id$

/**
*  Implements hook_user() to add fields to user registration form or add fields to database if the user opted in.
*/
function subscriptions_registration_user($type, $edit, &$account, $category = NULL) {
  static $new_uid = 0;
  switch ($type) {
    case 'register':
      return _subscriptions_registration_user_fields();
      break;

    case 'insert':
      $new_uid = $account->uid;
      $module_type = variable_get('subscriptions_registration_module', 'node');
      $node_type = variable_get('subscriptions_registration_type', 'story');
      if (isset($edit['subscriptions_decision']) && $edit['subscriptions_decision'] == 1){
        db_query('INSERT INTO {subscriptions} (module, field, value, recipient_uid, send_interval, author_uid, send_updates, send_comments) VALUES (\'%s\', \'%s\', \'%s\', %d, %d, %d, %d, %d)', $module_type, 'type', $node_type, $account->uid, 1, -1, 1, 1);
      }
      break;
  } // switch ($type}
}

/**
* Adds field to user registration field to allow users to subscribe to content
*/
function _subscriptions_registration_user_fields() {
  // Add a fieldset containing a checkbox for users to accept
  // getting updates on the registration form.
  $fields['subscriptions_agree'] = array(
    '#type' => 'fieldset',
    '#title' => t('News Subscriptions'),
  );   
     
  // Add the checkbox to the fieldset
  $fields['subscriptions_agree']['subscriptions_decision'] = array(
    '#type' => 'checkbox',
    '#title' => t('Subscribe to news posted on this site. Emails are sent every whenever a new article is posted.'),
    '#return_value' => 1,
    '#default_value' => 1,
    '#description' => t('By subscribing to <em>email updates</em>, you will be kept informed of news associated with ' . variable_get('site_name', 'Drupal') . '.'),
  );
    
  return $fields;
}


/**
* Display help and module information* @param path which path of the site we're displaying help
* @param arg array that holds the current path as would be returned from the arg() function* @return help text for the path
*/
function subscriptions_registration_help($path, $arg) {
  $output = '';  switch ($path) {
    case "admin/help#subscriptions_registration":
      $output = '<p>'. t("Adds a field to the user registration page to allow users to opt-in for Subscriptions") .'</p>';
      break;
  }
  return $output;
} // function subscriptions_registration_help


/*
* Implementation of hook_admin()
*/
function subscriptions_registration_admin() {

  $form['subscriptions_registration_enable'] = array(
    '#type' => 'checkbox',
    '#title' => t('Show Subscriptions block on the user registration form.'),
    '#default_value' => variable_get('subscriptions_registration_enable', 0),
  );

  $registration_modules = drupal_map_assoc(array('node'));
  $form['subscriptions_registration_module'] = array(
     '#type' => 'select',
     '#title' => t('Default Module Type'),
     '#default' => 'node',
     '#options' => $registration_modules,
     '#description' => t('The Subscription module to be used for default subscriptions.'),
  );

  $registration_types = drupal_map_assoc(array('story','page'));
  $form['subscriptions_registration_type'] = array(
     '#type' => 'select',
     '#title' => t('Default Node Type'),
     '#default' => 'node',
     '#options' => $registration_types,
     '#description' => t('The node type to be used for default subscriptions.'),
  );

  $registration_send_interval = drupal_map_assoc(array('1','900','3600','10800','86400'));
  $form['subscriptions_registration_send_interval'] = array(
     '#type' => 'select',
     '#title' => t('Minumum Send Interval'),
     '#default_value' => variable_get('subscriptions_registration_send_interval', 900),
     '#options' => $registration_send_interval,
     '#description' => t('The minimum frequency to send notifications in seconds.'),
  );

  $form['subscriptions_registration_send_updates'] = array(
    '#type' => 'checkbox',
    '#title' => t('Send email notifications when a node is updated.'),
    '#default_value' => variable_get('subscriptions_registration_send_updates', 0),
    '#descriptions' => t('Send email nofications when a node is updated?'),
  );

  $form['subscriptions_registration_send_comments'] = array(
    '#type' => 'checkbox',
    '#title' => t('Send email nofications when comments are added.'),
    '#default_value' => variable_get('subscriptions_registration_send_comments', 0),
    '#descriptions' => t('Send email nofications when comments are added?'),
  );
  return system_settings_form($form);
}

function subscriptions_registration_menu() {

  $items = array();

  $items['admin/settings/subscriptions_registration'] = array(
    'title' => 'Subscriptions Registration',
    'description' => 'Controls options for Subscriptions on the user registration form',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('subscriptions_registration_admin'),
    'access arguments' => array('access administration pages'),
    'type' => MENU_NORMAL_ITEM,
  );
  return $items;
}


/**
* hook_validate() implementation
*/
function subscriptions_registration_admin_validate($form, &$form_state) {
  $show_subscriptions = $form_state['values']['subscriptions_registration_enable']; 
  if ( ($show_subscriptions != 0) && ($show_subscriptions != 1) ) {
    form_set_error('show_subscriptions', t('Invalid value for show subscriptions.  (must be 0 or 1)'));
  }
}


/**
* Valid permissions for this module
* @return array An array of valid permissions for this module
*/
function subscriptions_registration_perm() {
  return array('administer Subscriptions Registration block');
} // function subscriptions_registration_perm()