<?php
// $Id: user_relationship_mailer.module,v 1.9 2007-12-18 02:40:28 sprsquish Exp $

if (!variable_get('user_relationship_mailer_ops', FALSE)) {
  variable_set('user_relationship_mailer_ops', array('request', 'cancel', 'approve', 'disapprove', 'remove'));
}

require_once('user_relationship_mailer_defaults.inc');

/**
 * Sends mail to the appropriate user
 *
 * @param $op
 *    string of action to take [request|cancel|approve|disapprove|remove]
 *
 * @param $relationship
 *    object of the relationship
 *
 */
function user_relationship_mailer_send_email($op, &$relationship) {
  $requester = $relationship->requester;
  $requestee = $relationship->requestee;

  $send_to_requestee = isset($requestee->user_relationship_mailer_send_mail) ? $requestee->user_relationship_mailer_send_mail : TRUE;
  $send_to_requester = isset($requester->user_relationship_mailer_send_mail) ? $requester->user_relationship_mailer_send_mail : TRUE;

  $send_to = array();
  switch ($op) {
  case 'request':
    if ($relationship->approved) {
      return;
    }
  case 'cancel':
    $send_email = $send_to_requestee;
    $send_to[]['address'] = $requestee->mail;
    break;

  case 'approve':
  case 'disapprove':
    $send_email = $send_to_requester;
    $send_to[]['address'] = $requester->mail;
    break;

  case 'remove':
    $send_email = $send_to_requestee && $send_to_requester;
    $send_to[] = array ('address' => $requester->mail, 'uid' => $requester->uid,);
    if (!$relationship->type->is_oneway) {
      $send_to[] = array ('address' => $requestee->mail, 'uid' => $requestee->uid,);
    }
    break;

  default:
    return;
  }

  $send_email = $send_email 
    && variable_get('user_relationship_mailer_send_mail', FALSE) 
    && variable_get("user_relationship_mailer_send_{$op}", TRUE);
  
  // sending email has been turned off
  if (!$send_email) {
    return;
  }
  foreach ($send_to as $target) {
    $replacements = user_relationship_mailer_replacements($relationship);
    if ($op == 'remove') {
      $replacements['@profile_uid'] = $target['uid'];
    }

    $message_function = "user_relationship_mailer_{$op}_default";
    $subject = t(variable_get("user_relationship_mailer_{$op}_subject", $message_function()), $replacements);
    $message = t(variable_get("user_relationship_mailer_{$op}_message", $message_function()), $replacements);

    $site_mail = variable_get('site_mail', '');
    if (!strlen($site_mail)) {
      if (user_access('administer nodes')){
        drupal_set_message(t('You should create an administrator mail address for your site! <a href="%url">Do it here</a>.', array('%url' => url('admin/settings/site-information'))), 'error');
      }
      $site_mail = 'nobody@localhost';
    }

    $errors = array();

    $replacements = array('%type' => $op, '%username' => $related->name);
    if (drupal_mail("user_relationship_mailer_user_$op", $target['address'], $subject, $message, $site_mail)) {
      watchdog('userreltnships', t('%type message was sent to %username', $replacements));
    }
    else {
      watchdog('userreltnships', t('There was a problem sending the %type message to %username', $replacements), WATCHDOG_WARNING);
    }
  }
}

/**
 * hook_user_relationships()
 */
function user_relationship_mailer_user_relationships($type, &$relationship, $category = NULL) {
  switch ($type) {
  case 'update':
    $status = 'approve';
  case 'insert':
    user_relationship_mailer_send_email(($status ? $status : 'request'), $relationship);
    break;

  case 'delete':
    user_relationship_mailer_send_email($category, $relationship);
    break;
  }
}

/**
 * hook_form_alter()
 */
function user_relationship_mailer_form_alter($form_id, &$form) {
  switch ($form_id) {
  case 'user_relationships_settings':
    global $user;
    $relationship = user_relationships_relationship_types_load();
    $relationship = array_pop($relationship);

    $form['mail'] = array(
      '#type'   => 'fieldset',
      '#title'  => t('Email Options'),
      '#weight' => -9,
    );
      $form['mail']['user_relationship_mailer_send_mail'] = array(
        '#type'           => 'checkbox',
        '#title'          => t('Allow users to turn off relationship messages'),
        '#default_value'  => variable_get('user_relationship_mailer_send_mail', FALSE),
        '#description'    => t('If you check this, users will have a new setting on their account edit page.'),
      );

      $user_relationship_mailer_ops = variable_get('user_relationship_mailer_ops', array());
      foreach ($user_relationship_mailer_ops as $op) {
        $message_function = "user_relationship_mailer_{$op}_default";
        $form['mail'][$op] = array(
          '#type'         => 'fieldset',
          '#title'        => t(ucfirst($op)),
          '#collapsible'  => TRUE,
          '#collapsed'    => TRUE
        );
          $form['mail'][$op]["user_relationship_mailer_send_{$op}"] = array(
            '#type'           => 'checkbox',
            '#title'          => t('Send @op messages', array('@op' => $op)),
            '#default_value'  => variable_get("user_relationship_mailer_send_{$op}", TRUE),
          );
          $form['mail'][$op]["user_relationship_mailer_{$op}_subject"] = array(
            '#type'           => 'textfield',
            '#title'          => t('@Op relationship email subject', array('@Op' => ucfirst($op))),
            '#default_value'  => variable_get("user_relationship_mailer_{$op}_subject", constant(strtoupper("user_relationship_mailer_{$op}_subject"))),
          );
          $form['mail'][$op]["user_relationship_mailer_{$op}_message"] = array(
            '#type'           => 'textarea',
            '#title'          => t('@Op relationship email message', array('@Op' => ucfirst($op))),
            '#default_value'  => variable_get("user_relationship_mailer_{$op}_message", $message_function()),
            '#description'    => t('Replacement strings are: %macros', array('%macros' => implode(', ', array_keys(user_relationship_mailer_replacements($relationship))))),
          );
      }
    break;
  }
}

/**
 * hook_user()
 */
function user_relationship_mailer_user($type, &$edit, &$account, $category = NULL) {
  switch($type) {
  case 'form':
    $form = array();
    if (($category == 'account') 
      && variable_get('user_relationship_mailer_send_mail', FALSE)
      && user_access('maintain relationships', $account)
    ) {
      $form['user_relationship_mailer_settings'] = array(
        '#type'   => 'fieldset',
        '#title'  => t('Relationship email settings'),
        '#weight' => 5
      );
        $form['user_relationship_mailer_settings']['user_relationship_mailer_send_mail'] = array(
          '#type'           => 'checkbox',
          '#title'          => t('Receive relationship email notifications'),
          '#options'        => $options,
          '#default_value'  => isset($edit['user_relationship_mailer_send_mail']) ? $edit['user_relationship_mailer_send_mail'] : TRUE,
          '#description'    => t("Check this if you'd like to receive relationship related email notifications")
        );
    }
    return $form;
  }  
}