<?php
/* vim: set ts=4 tw=4 sw=4 noet: */
require_once $CFG->root .'lib/db_implementation.php';

class DBMysqli extends DBImpl {

    private static $_instance = null;
    private $con = null;
    private $charset = 'utf8';
    private $numRows = -1;

    private function __construct() {
        $this->connect();
    }

    function __destruct() {
        if ($this->con) {
            $this->con->close();
            $this->con = null;
        }
    }

    private function __clone() {}

    public static function getInstance() {
        if (!is_object(self::$_instance)) {
            self::$_instance = new DBMysqli();
        }
        return self::$_instance;
    }

    private function connect() {
        global $CFG;

        if (!$this->con) {
            $this->con = new mysqli($CFG->amavisd_db_host, $CFG->amavisd_db_user,
                      $CFG->amavisd_db_password, $CFG->amavisd_db_name,
                      $CFG->amavisd_db_port);
            if ($this->con->connect_error) {
                die ('Connect error ('.$this->con->connect_errno.') '.
                    $this->con->connect_error);
            }
        }
    }

    public function setCharset($charset = 'utf8') {
        $this->charset = $charset;
    }

    private function changeCharset() {
        if (!$this->con->set_charset($this->charset)) {
            printf("Error loading character set %s: %s\n", $this->charset, $this->con->error);
        }
    }

    public function update($sql) {
        $success = true;

        if (! is_array($sql)) {
            $sql = array($sql);
        }

        $this->con->autocommit(false);
        foreach ($sql as $query) {
            $this->con->query($query) ? null : $success = false;
        }
        $success ? $this->con->commit() : $this->con->rollback();
        $this->con->autocommit(true);

        return $success;
    }

    function getMarked($recipient = 'all') {
        $all = array();

        $query = "select distinct m.mail_id as id from quarantine q, msgrcpt m, msgs s, maddr r ";
        $query .= "where m.mail_id = q.mail_id and q.mail_id = s.mail_id and m.rid = r.id ";
        $query .= "and (m.rs = 'R' or m.rs = 'D')";

        if ($recipient != 'all') {
            $query .= " and email = '$recipient'";
        }

        if ($result = $this->con->query($query)) {
            while ($row = $result->fetch_object()) {
                $all[] = $row->id;
            }
        }

        return $all;
    }

    public function getQMails($offset = -1, $rowsPerPage = -1, $recipient = 'all') {
        $row = array();
        $this->changeCharset();
        $query = "SELECT DISTINCT quarantine.mail_id, secret_id, rs, bspam_level, ";
        $query .= "(UNIX_TIMESTAMP(time_iso) + (3600 * 2)) AS time_iso, ";
        $query .= "SUBSTRING(sender.email,1,35) AS sender, ";
        $query .= "SUBSTRING(recipient.email,1,28) AS recipient, size, msgrcpt.content ";
        $query .= "AS quaratinefor, SUBSTRING( subject, 1, 25) AS subject FROM ";
        $query .= "`quarantine` LEFT JOIN msgrcpt ON msgrcpt.mail_id = quarantine.mail_id ";
        $query .= "LEFT JOIN msgs ON msgs.mail_id = quarantine.mail_id LEFT JOIN maddr AS ";
        $query .= "recipient ON msgrcpt.rid = recipient.id LEFT JOIN maddr AS sender ON ";
        $query .= "msgs.sid = sender.id WHERE msgrcpt.rs != 'R' AND msgrcpt.rs != 'D'";

        if ($recipient != 'all') {
            $query .= " and recipient.email = '$recipient'";
        }

        if ($offset >= 0 && $rowsPerPage >= 0) {
            $result = $this->con->query($query, MYSQLI_STORE_RESULT);
            if ($result) {
                $this->numRows = $result->num_rows;
                $result->free();
            } else {
                $this->numRows = 0;
            }
            $query .= " ORDER BY time_iso DESC LIMIT $offset, $rowsPerPage";
        }

        if ($result = $this->con->query($query, MYSQLI_USE_RESULT)) {
            if ($this->numRows < 0)
                $this->numRows = $result->num_rows;
            while ($obj = $result->fetch_object()) {
                $row[] = $obj;
            }
            $result->free();
        }

        return $row;
    }

    public function numRows() {
        return $this->numRows;
    }

    public function getMail($id) {
        $row = null;

        $this->changeCharset();
        $query = "SELECT * FROM quarantine WHERE mail_id = '$id'";
        if ($result = $this->con->query($query, MYSQLI_USE_RESULT)) {
            $row = $result->fetch_object();
        }

        return $row;
    }

}

?>