<?php
// +-----------------------------------------------------------------------+
// | This file is part of Piwigo.                                          |
// |                                                                       |
// | For copyright and license information, please view the COPYING.txt    |
// | file that was distributed with this source code.                      |
// +-----------------------------------------------------------------------+

// +-----------------------------------------------------------------------+
// | include                                                               |
// +-----------------------------------------------------------------------+

if (!defined('PHPWG_ROOT_PATH'))
{
  die ("Hacking attempt!");
}

include_once(PHPWG_ROOT_PATH.'admin/include/functions.php');
include_once(PHPWG_ROOT_PATH.'admin/include/functions_notification_by_mail.inc.php');
include_once(PHPWG_ROOT_PATH.'admin/include/tabsheet.class.php');
include_once(PHPWG_ROOT_PATH.'include/common.inc.php');
include_once(PHPWG_ROOT_PATH.'include/functions_notification.inc.php');
include_once(PHPWG_ROOT_PATH.'include/functions_mail.inc.php');

// +-----------------------------------------------------------------------+
// | Check Access and exit when user status is not ok                      |
// +-----------------------------------------------------------------------+
check_status(ACCESS_ADMINISTRATOR);

check_input_parameter('mode', $_GET, false, '/^(param|subscribe|send)$/');

// +-----------------------------------------------------------------------+
// | Initialization                                                        |
// +-----------------------------------------------------------------------+
$base_url = get_root_url().'admin.php';
$must_repost = false;

// +-----------------------------------------------------------------------+
// | functions                                                             |
// +-----------------------------------------------------------------------+

/*
 * Do timeout treatment in order to finish to send mails
 *
 * @param $post_keyname: key of check_key post array
 * @param check_key_treated: array of check_key treated
 * @return none
 */
function do_timeout_treatment($post_keyname, $check_key_treated = array())
{
  global $env_nbm, $base_url, $page, $must_repost;

  if ($env_nbm['is_sendmail_timeout'])
  {
    if (isset($_POST[$post_keyname]))
    {
      $post_count = count($_POST[$post_keyname]);
      $treated_count = count($check_key_treated);
      if ($treated_count != 0)
      {
        $time_refresh = ceil((get_moment() - $env_nbm['start_time']) * $post_count / $treated_count);
      }
      else
      {
        $time_refresh = 0;
      }
      $_POST[$post_keyname] = array_diff($_POST[$post_keyname], $check_key_treated);

      $must_repost = true;
      $page['errors'][] = l10n_dec(
        'Execution time is out, treatment must be continue [Estimated time: %d second].',
        'Execution time is out, treatment must be continue [Estimated time: %d seconds].',
        $time_refresh
        );
    }
  }

}

/*
 * Get the authorized_status for each tab
 * return corresponding status
 */
function get_tab_status($mode)
{
  $result = ACCESS_WEBMASTER;
  switch ($mode)
  {
    case 'param':
    case 'subscribe':
      $result = ACCESS_WEBMASTER;
      break;
    case 'send':
      $result = ACCESS_ADMINISTRATOR;
      break;
    default:
      $result = ACCESS_WEBMASTER;
      break;
  }
  return $result;
}

/*
 * Inserting News users
 */
function insert_new_data_user_mail_notification()
{
  global $conf, $page, $env_nbm;

  // Set null mail_address empty
  $query = '
update
  '.USERS_TABLE.'
set
  '.$conf['user_fields']['email'].' = null
where
  trim('.$conf['user_fields']['email'].') = \'\';';
  pwg_query($query);

  // null mail_address are not selected in the list
  $query = '
select
  u.'.$conf['user_fields']['id'].' as user_id,
  u.'.$conf['user_fields']['username'].' as username,
  u.'.$conf['user_fields']['email'].' as mail_address
from
  '.USERS_TABLE.' as u left join '.USER_MAIL_NOTIFICATION_TABLE.' as m on u.'.$conf['user_fields']['id'].' = m.user_id
where
  u.'.$conf['user_fields']['email'].' is not null and
  m.user_id is null
order by
  user_id;';

  $result = pwg_query($query);

  if (pwg_db_num_rows($result) > 0)
  {
    $inserts = array();
    $check_key_list = array();

    while ($nbm_user = pwg_db_fetch_assoc($result))
    {
      // Calculate key
      $nbm_user['check_key'] = find_available_check_key();

      // Save key
      $check_key_list[] = $nbm_user['check_key'];

      // Insert new nbm_users
      $inserts[] = array(
        'user_id' => $nbm_user['user_id'],
        'check_key' => $nbm_user['check_key'],
        'enabled' => 'false' // By default if false, set to true with specific functions
        );

      $page['infos'][] = l10n(
        'User %s [%s] added.',
        stripslashes($nbm_user['username']),
        $nbm_user['mail_address']
        );
    }

    // Insert new nbm_users
    mass_inserts(USER_MAIL_NOTIFICATION_TABLE, array('user_id', 'check_key', 'enabled'), $inserts);
    // Update field enabled with specific function
    $check_key_treated = do_subscribe_unsubscribe_notification_by_mail
    (
      true,
      $conf['nbm_default_value_user_enabled'],
      $check_key_list
    );

     // On timeout simulate like tabsheet send
    if ($env_nbm['is_sendmail_timeout'])
    {
      $quoted_check_key_list = quote_check_key_list(array_diff($check_key_list, $check_key_treated));
      if (count($quoted_check_key_list) != 0 )
      {
        $query = 'delete from '.USER_MAIL_NOTIFICATION_TABLE.' where check_key in ('.implode(",", $quoted_check_key_list).');';
        $result = pwg_query($query);

        redirect($base_url.get_query_string_diff(array(), false), l10n('Operation in progress')."\n".l10n('Please wait...'));
      }
    }
  }
}

/*
 * Apply global functions to mail content
 * return customize mail content rendered
 */
function render_global_customize_mail_content($customize_mail_content)
{
  global $conf;

  if ($conf['nbm_send_html_mail'] and !(strpos($customize_mail_content, '<') === 0))
  {
    // On HTML mail, detects if the content are HTML format.
    // If it's plain text format, convert content to readable HTML
    return nl2br(htmlspecialchars($customize_mail_content));
  }
  else
  {
    return $customize_mail_content;
  }
}

/*
 * Send mail for notification to all users
 * Return list of "selected" users for 'list_to_send'
 * Return list of "treated" check_key for 'send'
 */
function do_action_send_mail_notification($action = 'list_to_send', $check_key_list = array(), $customize_mail_content = '')
{
  global $conf, $page, $user, $lang_info, $lang, $env_nbm;
  $return_list = array();

  if (in_array($action, array('list_to_send', 'send')))
  {
    list($dbnow) = pwg_db_fetch_row(pwg_query('SELECT NOW();'));

    $is_action_send = ($action == 'send');

    // disabled and null mail_address are not selected in the list
    $data_users = get_user_notifications('send', $check_key_list);

    // List all if it's define on options or on timeout
    $is_list_all_without_test = ($env_nbm['is_sendmail_timeout'] or $conf['nbm_list_all_enabled_users_to_send']);

    // Check if exist news to list user or send mails
    if ((!$is_list_all_without_test) or ($is_action_send))
    {
      if (count($data_users) > 0)
      {
        $datas = array();

        if (!isset($customize_mail_content))
        {
          $customize_mail_content = $conf['nbm_complementary_mail_content'];
        }

        $customize_mail_content = 
          trigger_change('nbm_render_global_customize_mail_content', $customize_mail_content);


        // Prepare message after change language
        if ($is_action_send)
        {
          $msg_break_timeout = l10n('Time to send mail is limited. Others mails are skipped.');
        }
        else
        {
          $msg_break_timeout = l10n('Prepared time for list of users to send mail is limited. Others users are not listed.');
        }

        // Begin nbm users environment
        begin_users_env_nbm($is_action_send);

        foreach ($data_users as $nbm_user)
        {
          if ((!$is_action_send) and check_sendmail_timeout())
          {
            // Stop fill list on 'list_to_send', if the quota is override
            $page['infos'][] = $msg_break_timeout;
            break;
          }
          if (($is_action_send) and check_sendmail_timeout())
          {
            // Stop fill list on 'send', if the quota is override
            $page['errors'][] = $msg_break_timeout;
            break;
          }

          // set env nbm user
          set_user_on_env_nbm($nbm_user, $is_action_send);

          if ($is_action_send)
          {
            $auth = null;
            $add_url_params = array();
            
            $auth_key = create_user_auth_key($nbm_user['user_id'], $nbm_user['status']);
            
            if ($auth_key !== false)
            {
              $auth = $auth_key['auth_key'];
              $add_url_params['auth'] = $auth;
            }
            
            set_make_full_url();
            // Fill return list of "treated" check_key for 'send'
            $return_list[] = $nbm_user['check_key'];

            if ($conf['nbm_send_detailed_content'])
            {
              $news = news($nbm_user['last_send'], $dbnow, false, $conf['nbm_send_html_mail'], $auth);
               $exist_data = count($news) > 0;
            }
            else
            {
              $exist_data = news_exists($nbm_user['last_send'], $dbnow);
            }

            if ($exist_data)
            {
              $subject = '['.$conf['gallery_title'].'] '.l10n('New photos added');

              // Assign current var for nbm mail
              assign_vars_nbm_mail_content($nbm_user);

              if (!is_null($nbm_user['last_send']))
              {
                $env_nbm['mail_template']->assign
                (
                  'content_new_elements_between',
                  array
                  (
                    'DATE_BETWEEN_1' => $nbm_user['last_send'],
                    'DATE_BETWEEN_2' => $dbnow,
                  )
                );
              }
              else
              {
                $env_nbm['mail_template']->assign
                (
                  'content_new_elements_single',
                  array
                  (
                    'DATE_SINGLE' => $dbnow,
                  )
                );
              }

              if ($conf['nbm_send_detailed_content'])
              {
                $env_nbm['mail_template']->assign('global_new_lines', $news);
              }

              $nbm_user_customize_mail_content = 
                trigger_change('nbm_render_user_customize_mail_content',
                  $customize_mail_content, $nbm_user);
              if (!empty($nbm_user_customize_mail_content))
              {
                $env_nbm['mail_template']->assign
                (
                  'custom_mail_content', $nbm_user_customize_mail_content
                );
              }

              if ($conf['nbm_send_html_mail'] and $conf['nbm_send_recent_post_dates'])
              {
                $recent_post_dates = get_recent_post_dates_array(
                  $conf['recent_post_dates']['NBM']);
                foreach ($recent_post_dates as $date_detail)
                {
                  $env_nbm['mail_template']->append
                  (
                    'recent_posts',
                    array
                    (
                      'TITLE' => get_title_recent_post_date($date_detail),
                      'HTML_DATA' => get_html_description_recent_post_date($date_detail, $auth)
                    )
                  );
                }
              }

              $env_nbm['mail_template']->assign
              (
                array
                (
                  'GOTO_GALLERY_TITLE' => $conf['gallery_title'],
                  'GOTO_GALLERY_URL' => add_url_params(get_gallery_home_url(), $add_url_params),
                  'SEND_AS_NAME'      => $env_nbm['send_as_name'],
                )
              );
              
              $ret = pwg_mail(
                array(
                  'name' => stripslashes($nbm_user['username']),
                  'email' => $nbm_user['mail_address'],
                  ),
                array(
                  'from' => $env_nbm['send_as_mail_formated'],
                  'subject' => $subject,
                  'email_format' => $env_nbm['email_format'],
                  'content' => $env_nbm['mail_template']->parse('notification_by_mail', true),
                  'content_format' => $env_nbm['email_format'],
                  'auth_key' => $auth,
                  )
                );

              if ($ret)
              {
                inc_mail_sent_success($nbm_user);

                $datas[] = array(
                  'user_id' => $nbm_user['user_id'],
                  'last_send' => $dbnow
                  );
              }
              else
              {
                inc_mail_sent_failed($nbm_user);
              }

              unset_make_full_url();
            }
          }
          else
          {
            if (news_exists($nbm_user['last_send'], $dbnow))
            {
              // Fill return list of "selected" users for 'list_to_send'
              $return_list[] = $nbm_user;
            }
          }

          // unset env nbm user
          unset_user_on_env_nbm();
        }

        // Restore nbm environment
        end_users_env_nbm();

        if ($is_action_send)
        {
          mass_updates(
            USER_MAIL_NOTIFICATION_TABLE,
            array(
              'primary' => array('user_id'),
              'update' => array('last_send')
             ),
             $datas
             );

          display_counter_info();
        }
      }
      else
      {
        if ($is_action_send)
        {
          $page['errors'][] = l10n('No user to send notifications by mail.');
        }
      }
    }
    else
    {
      // Quick List, don't check news
      // Fill return list of "selected" users for 'list_to_send'
      $return_list = $data_users;
    }
  }

  // Return list of "selected" users for 'list_to_send'
  // Return list of "treated" check_key for 'send'
  return $return_list;
}

// +-----------------------------------------------------------------------+
// | Main                                                                  |
// +-----------------------------------------------------------------------+
if (!isset($_GET['mode']))
{
  $page['mode'] = 'send';
}
else
{
  $page['mode'] = $_GET['mode'];
}

// +-----------------------------------------------------------------------+
// | Check Access and exit when user status is not ok                      |
// +-----------------------------------------------------------------------+
check_status(get_tab_status($page['mode']));


// +-----------------------------------------------------------------------+
// | Add event handler                                                     |
// +-----------------------------------------------------------------------+
add_event_handler('nbm_render_global_customize_mail_content', 'render_global_customize_mail_content');
trigger_notify('nbm_event_handler_added');


// +-----------------------------------------------------------------------+
// | Insert new users with mails                                           |
// +-----------------------------------------------------------------------+
if (!isset($_POST) or (count($_POST) ==0))
{
  // No insert data in post mode
  insert_new_data_user_mail_notification();
}

// +-----------------------------------------------------------------------+
// | Treatment of tab post                                                 |
// +-----------------------------------------------------------------------+

if (!empty($_POST))
{
  check_pwg_token();
}

switch ($page['mode'])
{
  case 'param' :
  {
    if (isset($_POST['param_submit']))
    {
      $_POST['nbm_send_mail_as'] = strip_tags($_POST['nbm_send_mail_as']);

      check_input_parameter('nbm_send_html_mail', $_POST, false, '/^(true|false)$/');
      check_input_parameter('nbm_send_detailed_content', $_POST, false, '/^(true|false)$/');
      check_input_parameter('nbm_send_recent_post_dates', $_POST, false, '/^(true|false)$/');

      $updated_param_count = 0;
      // Update param
      $result = pwg_query('select param, value from '.CONFIG_TABLE.' where param like \'nbm\\_%\'');
      while ($nbm_user = pwg_db_fetch_assoc($result))
      {
        if (isset($_POST[$nbm_user['param']]))
        {
          conf_update_param($nbm_user['param'], $_POST[$nbm_user['param']], true);
          $updated_param_count++;
        }
      }

      $page['infos'][] = l10n_dec(
        '%d parameter was updated.', '%d parameters were updated.',
        $updated_param_count
        );
    }
  }
  case 'subscribe' :
  {
    if (isset($_POST['falsify']) and isset($_POST['cat_true']))
    {
      $check_key_treated = unsubscribe_notification_by_mail(true, $_POST['cat_true']);
      do_timeout_treatment('cat_true', $check_key_treated);
    }
    else
    if (isset($_POST['trueify']) and isset($_POST['cat_false']))
    {
      $check_key_treated = subscribe_notification_by_mail(true, $_POST['cat_false']);
      do_timeout_treatment('cat_false', $check_key_treated);
    }
    break;
  }

  case 'send' :
  {
    if (isset($_POST['send_submit']) and isset($_POST['send_selection']) and isset($_POST['send_customize_mail_content']))
    {
      $check_key_treated = do_action_send_mail_notification('send', $_POST['send_selection'], stripslashes($_POST['send_customize_mail_content']));
      do_timeout_treatment('send_selection', $check_key_treated);
    }
  }
}

// +-----------------------------------------------------------------------+
// | template initialization                                               |
// +-----------------------------------------------------------------------+
$template->set_filenames
(
  array
  (
    'double_select' => 'double_select.tpl',
    'notification_by_mail'=>'notification_by_mail.tpl'
  )
);

$template->assign
(
  array
  (
    'PWG_TOKEN' => get_pwg_token(),
    'U_HELP' => get_root_url().'admin/popuphelp.php?page=notification_by_mail',
    'F_ACTION'=> $base_url.get_query_string_diff(array())
  )
);

if (is_autorize_status(ACCESS_WEBMASTER))
{
  // TabSheet
  $tabsheet = new tabsheet();
  $tabsheet->set_id('nbm');
  $tabsheet->select($page['mode']);
  $tabsheet->assign();
}

if ($must_repost)
{
  // Get name of submit button
  $repost_submit_name = '';
  if (isset($_POST['falsify']))
  {
    $repost_submit_name = 'falsify';
  }
  elseif (isset($_POST['trueify']))
  {
    $repost_submit_name = 'trueify';
  }
  elseif (isset($_POST['send_submit']))
  {
    $repost_submit_name = 'send_submit';
  }

  $template->assign('REPOST_SUBMIT_NAME', $repost_submit_name);
}

switch ($page['mode'])
{
  case 'param' :
  {
    $template->assign(
      $page['mode'],
      array(
        'SEND_HTML_MAIL' => $conf['nbm_send_html_mail'],
        'SEND_MAIL_AS' => $conf['nbm_send_mail_as'],
        'SEND_DETAILED_CONTENT' => $conf['nbm_send_detailed_content'],
        'COMPLEMENTARY_MAIL_CONTENT' => $conf['nbm_complementary_mail_content'],
        'SEND_RECENT_POST_DATES' => $conf['nbm_send_recent_post_dates'],
        ));
    break;
  }

  case 'subscribe' :
  {
    $template->assign( $page['mode'], true );

    $template->assign(
      array(
        'L_CAT_OPTIONS_TRUE' => l10n('Subscribed'),
        'L_CAT_OPTIONS_FALSE' => l10n('Unsubscribed')
        )
      );

    $data_users = get_user_notifications('subscribe');
    
    $opt_true = array();
    $opt_true_selected = array();
    $opt_false = array();
    $opt_false_selected = array();
    foreach ($data_users as $nbm_user)
    {
      if (get_boolean($nbm_user['enabled']))
      {
        $opt_true[ $nbm_user['check_key'] ] = stripslashes($nbm_user['username']).'['.$nbm_user['mail_address'].']';
        if ((isset($_POST['falsify']) and isset($_POST['cat_true']) and in_array($nbm_user['check_key'], $_POST['cat_true'])))
        {
          $opt_true_selected[] = $nbm_user['check_key'];
        }
      }
      else
      {
        $opt_false[ $nbm_user['check_key'] ] = stripslashes($nbm_user['username']).'['.$nbm_user['mail_address'].']';
        if (isset($_POST['trueify']) and isset($_POST['cat_false']) and in_array($nbm_user['check_key'], $_POST['cat_false']))
        {
          $opt_false_selected[] = $nbm_user['check_key'];
        }
      }
    }
    $template->assign( array(
        'category_option_true'          => $opt_true,
        'category_option_true_selected' => $opt_true_selected,
        'category_option_false'         => $opt_false,
        'category_option_false_selected' => $opt_false_selected,
        )
    );
    $template->assign_var_from_handle('DOUBLE_SELECT', 'double_select');
    break;
  }

  case 'send' :
  {
    $tpl_var = array('users'=> array() );

    $data_users = do_action_send_mail_notification('list_to_send');

    $tpl_var['CUSTOMIZE_MAIL_CONTENT'] = 
      isset($_POST['send_customize_mail_content']) 
        ? stripslashes($_POST['send_customize_mail_content']) 
        : $conf['nbm_complementary_mail_content'];

    if  (count($data_users))
    {
      foreach ($data_users as $nbm_user)
      {
        if (
            (!$must_repost) or // Not timeout, normal treatment
            (($must_repost) and in_array($nbm_user['check_key'], $_POST['send_selection']))  // Must be repost, show only user to send
            )
        {
          $tpl_var['users'][] = 
            array(
              'ID' => $nbm_user['check_key'],
              'CHECKED' =>  ( // not check if not selected,  on init select<all
                              isset($_POST['send_selection']) and // not init
                              !in_array($nbm_user['check_key'], $_POST['send_selection']) // not selected
                            )   ? '' : 'checked="checked"',
              'USERNAME'=> stripslashes($nbm_user['username']),
              'EMAIL' => $nbm_user['mail_address'],
              'LAST_SEND'=> $nbm_user['last_send']
              );
        }
      }
    }
    $template->assign($page['mode'], $tpl_var);

    if ($conf['auth_key_duration'] > 0)
    {
      $template->assign(
        'auth_key_duration',
        time_since(
          strtotime('now -'.$conf['auth_key_duration'].' second'),
          'second',
          null,
          false
          )
        );
    }

    break;
  }
}

$template->assign('ADMIN_PAGE_TITLE', l10n('Send mail to users'));

// +-----------------------------------------------------------------------+
// | Sending html code                                                     |
// +-----------------------------------------------------------------------+
$template->assign_var_from_handle('ADMIN_CONTENT', 'notification_by_mail');

?>
