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<?php
/**
*
* This file is part of the phpBB Forum Software package.
*
* @copyright (c) phpBB Limited <https://www.phpbb.com>
* @license GNU General Public License, version 2 (GPL-2.0)
*
* For full copyright and license information, please see
* the docs/CREDITS.txt file.
*
*/
/**
* @ignore
*/
if (!defined('IN_PHPBB'))
{
    exit;
}
class acp_email
{
    var $u_action;
    function main($id, $mode)
    {
        global $config, $db, $user, $template, $phpbb_log, $request;
        global $phpbb_root_path, $phpbb_admin_path, $phpEx, $phpbb_dispatcher;
        $user->add_lang('acp/email');
        $this->tpl_name = 'acp_email';
        $this->page_title = 'ACP_MASS_EMAIL';
        $form_key = 'acp_email';
        add_form_key($form_key);
        // Set some vars
        $submit = (isset($_POST['submit'])) ? true : false;
        $error = array();
        $usernames    = $request->variable('usernames', '', true);
        $usernames    = (!empty($usernames)) ? explode("\n", $usernames) : array();
        $group_id    = $request->variable('g', 0);
        $subject    = $request->variable('subject', '', true);
        $message    = $request->variable('message', '', true);
        // Do the job ...
        if ($submit)
        {
            // Error checking needs to go here ... if no subject and/or no message then skip
            // over the send and return to the form
            $use_queue        = (isset($_POST['send_immediately'])) ? false : true;
            $priority        = $request->variable('mail_priority_flag', MAIL_NORMAL_PRIORITY);
            if (!check_form_key($form_key))
            {
                $error[] = $user->lang['FORM_INVALID'];
            }
            if (!$subject)
            {
                $error[] = $user->lang['NO_EMAIL_SUBJECT'];
            }
            if (!$message)
            {
                $error[] = $user->lang['NO_EMAIL_MESSAGE'];
            }
            if (!count($error))
            {
                if (!empty($usernames))
                {
                    // If giving usernames the admin is able to email inactive users too...
                    $sql_ary = array(
                        'SELECT'    => 'username, user_email, user_jabber, user_notify_type, user_lang',
                        'FROM'        => array(
                            USERS_TABLE        => '',
                        ),
                        'WHERE'        => $db->sql_in_set('username_clean', array_map('utf8_clean_string', $usernames)) . '
                            AND user_allow_massemail = 1',
                        'ORDER_BY'    => 'user_lang, user_notify_type',
                    );
                }
                else
                {
                    if ($group_id)
                    {
                        $sql_ary = array(
                            'SELECT'    => 'u.user_email, u.username, u.username_clean, u.user_lang, u.user_jabber, u.user_notify_type',
                            'FROM'        => array(
                                USERS_TABLE            => 'u',
                                USER_GROUP_TABLE    => 'ug',
                            ),
                            'WHERE'        => 'ug.group_id = ' . $group_id . '
                                AND ug.user_pending = 0
                                AND u.user_id = ug.user_id
                                AND u.user_allow_massemail = 1
                                AND u.user_type IN (' . USER_NORMAL . ', ' . USER_FOUNDER . ')',
                            'ORDER_BY'    => 'u.user_lang, u.user_notify_type',
                        );
                    }
                    else
                    {
                        $sql_ary = array(
                            'SELECT'    => 'u.username, u.username_clean, u.user_email, u.user_jabber, u.user_lang, u.user_notify_type',
                            'FROM'        => array(
                                USERS_TABLE    => 'u',
                            ),
                            'WHERE'        => 'u.user_allow_massemail = 1
                                AND u.user_type IN (' . USER_NORMAL . ', ' . USER_FOUNDER . ')',
                            'ORDER_BY'    => 'u.user_lang, u.user_notify_type',
                        );
                    }
                    // Mail banned or not
                    if (!isset($_REQUEST['mail_banned_flag']))
                    {
                        $sql_ary['WHERE'] .= ' AND (b.ban_id IS NULL
                                OR b.ban_exclude = 1)';
                        $sql_ary['LEFT_JOIN'] = array(
                            array(
                                'FROM'    => array(
                                    BANLIST_TABLE    => 'b',
                                ),
                                'ON'    => 'u.user_id = b.ban_userid',
                            ),
                        );
                    }
                }
                /**
                * Modify sql query to change the list of users the email is sent to
                *
                * @event core.acp_email_modify_sql
                * @var    array    sql_ary        Array which is used to build the sql query
                * @since 3.1.2-RC1
                */
                $vars = array('sql_ary');
                extract($phpbb_dispatcher->trigger_event('core.acp_email_modify_sql', compact($vars)));
                $sql = $db->sql_build_query('SELECT', $sql_ary);
                $result = $db->sql_query($sql);
                $row = $db->sql_fetchrow($result);
                if (!$row)
                {
                    $db->sql_freeresult($result);
                    trigger_error($user->lang['NO_USER'] . adm_back_link($this->u_action), E_USER_WARNING);
                }
                $i = $j = 0;
                // Send with BCC
                // Maximum number of bcc recipients
                $max_chunk_size = (int) $config['email_max_chunk_size'];
                $email_list = array();
                $old_lang = $row['user_lang'];
                $old_notify_type = $row['user_notify_type'];
                do
                {
                    if (($row['user_notify_type'] == NOTIFY_EMAIL && $row['user_email']) ||
                        ($row['user_notify_type'] == NOTIFY_IM && $row['user_jabber']) ||
                        ($row['user_notify_type'] == NOTIFY_BOTH && ($row['user_email'] || $row['user_jabber'])))
                    {
                        if ($i == $max_chunk_size || $row['user_lang'] != $old_lang || $row['user_notify_type'] != $old_notify_type)
                        {
                            $i = 0;
                            if (count($email_list))
                            {
                                $j++;
                            }
                            $old_lang = $row['user_lang'];
                            $old_notify_type = $row['user_notify_type'];
                        }
                        $email_list[$j][$i]['lang']        = $row['user_lang'];
                        $email_list[$j][$i]['method']    = $row['user_notify_type'];
                        $email_list[$j][$i]['email']    = $row['user_email'];
                        $email_list[$j][$i]['name']        = $row['username'];
                        $email_list[$j][$i]['jabber']    = $row['user_jabber'];
                        $i++;
                    }
                }
                while ($row = $db->sql_fetchrow($result));
                $db->sql_freeresult($result);
                // Send the messages
                if (!class_exists('messenger'))
                {
                    include($phpbb_root_path . 'includes/functions_messenger.' . $phpEx);
                }
                if (!function_exists('get_group_name'))
                {
                    include($phpbb_root_path . 'includes/functions_user.' . $phpEx);
                }
                $messenger = new messenger($use_queue);
                $errored = false;
                $email_template = 'admin_send_email';
                $template_data = array(
                    'CONTACT_EMAIL' => phpbb_get_board_contact($config, $phpEx),
                    'MESSAGE'        => html_entity_decode($message, ENT_COMPAT),
                );
                $generate_log_entry = true;
                /**
                * Modify email template data before the emails are sent
                *
                * @event core.acp_email_send_before
                * @var    string    email_template        The template to be used for sending the email
                * @var    string    subject                The subject of the email
                * @var    array    template_data        Array with template data assigned to email template
                * @var    bool    generate_log_entry    If false, no log entry will be created
                * @var    array    usernames            Usernames which will be displayed in log entry, if it will be created
                * @var    int        group_id            The group this email will be sent to
                * @var    bool    use_queue            If true, email queue will be used for sending
                * @var    int        priority            Priority of sent emails
                * @since 3.1.3-RC1
                */
                $vars = array(
                    'email_template',
                    'subject',
                    'template_data',
                    'generate_log_entry',
                    'usernames',
                    'group_id',
                    'use_queue',
                    'priority',
                );
                extract($phpbb_dispatcher->trigger_event('core.acp_email_send_before', compact($vars)));
                for ($i = 0, $size = count($email_list); $i < $size; $i++)
                {
                    $used_lang = $email_list[$i][0]['lang'];
                    $used_method = $email_list[$i][0]['method'];
                    for ($j = 0, $list_size = count($email_list[$i]); $j < $list_size; $j++)
                    {
                        $email_row = $email_list[$i][$j];
                        $messenger->{((count($email_list[$i]) == 1) ? 'to' : 'bcc')}($email_row['email'], $email_row['name']);
                        $messenger->im($email_row['jabber'], $email_row['name']);
                    }
                    $messenger->template($email_template, $used_lang);
                    $messenger->anti_abuse_headers($config, $user);
                    $messenger->subject(html_entity_decode($subject, ENT_COMPAT));
                    $messenger->set_mail_priority($priority);
                    $messenger->assign_vars($template_data);
                    if (!($messenger->send($used_method)))
                    {
                        $errored = true;
                    }
                }
                unset($email_list);
                $messenger->save_queue();
                if ($generate_log_entry)
                {
                    if (!empty($usernames))
                    {
                        $phpbb_log->add('admin', $user->data['user_id'], $user->ip, 'LOG_MASS_EMAIL', false, array(implode(', ', utf8_normalize_nfc($usernames))));
                    }
                    else
                    {
                        if ($group_id)
                        {
                            $group_name = get_group_name($group_id);
                        }
                        else
                        {
                            // Not great but the logging routine doesn't cope well with localising on the fly
                            $group_name = $user->lang['ALL_USERS'];
                        }
                        $phpbb_log->add('admin', $user->data['user_id'], $user->ip, 'LOG_MASS_EMAIL', false, array($group_name));
                    }
                }
                if (!$errored)
                {
                    $message = ($use_queue) ? $user->lang['EMAIL_SENT_QUEUE'] : $user->lang['EMAIL_SENT'];
                    trigger_error($message . adm_back_link($this->u_action));
                }
                else
                {
                    $message = sprintf($user->lang['EMAIL_SEND_ERROR'], '<a href="' . append_sid("{$phpbb_admin_path}index.$phpEx", 'i=logs&amp;mode=critical') . '">', '</a>');
                    trigger_error($message . adm_back_link($this->u_action), E_USER_WARNING);
                }
            }
        }
        // Exclude bots and guests...
        $sql = 'SELECT group_id
            FROM ' . GROUPS_TABLE . "
            WHERE group_name IN ('BOTS', 'GUESTS')";
        $result = $db->sql_query($sql);
        $exclude = array();
        while ($row = $db->sql_fetchrow($result))
        {
            $exclude[] = $row['group_id'];
        }
        $db->sql_freeresult($result);
        $select_list = '<option value="0"' . ((!$group_id) ? ' selected="selected"' : '') . '>' . $user->lang['ALL_USERS'] . '</option>';
        $select_list .= group_select_options($group_id, $exclude);
        $s_priority_options = '<option value="' . MAIL_LOW_PRIORITY . '">' . $user->lang['MAIL_LOW_PRIORITY'] . '</option>';
        $s_priority_options .= '<option value="' . MAIL_NORMAL_PRIORITY . '" selected="selected">' . $user->lang['MAIL_NORMAL_PRIORITY'] . '</option>';
        $s_priority_options .= '<option value="' . MAIL_HIGH_PRIORITY . '">' . $user->lang['MAIL_HIGH_PRIORITY'] . '</option>';
        $template_data = array(
            'S_WARNING'                => (count($error)) ? true : false,
            'WARNING_MSG'            => (count($error)) ? implode('<br />', $error) : '',
            'U_ACTION'                => $this->u_action,
            'S_GROUP_OPTIONS'        => $select_list,
            'USERNAMES'                => implode("\n", $usernames),
            'U_FIND_USERNAME'        => append_sid("{$phpbb_root_path}memberlist.$phpEx", 'mode=searchuser&amp;form=acp_email&amp;field=usernames'),
            'SUBJECT'                => $subject,
            'MESSAGE'                => $message,
            'S_PRIORITY_OPTIONS'    => $s_priority_options,
        );
        /**
        * Modify custom email template data before we display the form
        *
        * @event core.acp_email_display
        * @var    array    template_data        Array with template data assigned to email template
        * @var    array    exclude                Array with groups which are excluded from group selection
        * @var    array    usernames            Usernames which will be displayed in form
        *
        * @since 3.1.4-RC1
        */
        $vars = array('template_data', 'exclude', 'usernames');
        extract($phpbb_dispatcher->trigger_event('core.acp_email_display', compact($vars)));
        $template->assign_vars($template_data);
    }
}