<?php

# do not include twice
if (isset($mysql))
  return;

include_once BASE . "/lib/http.php";
include_once BASE . "/lib/mysql-joins.php";

$mysql = new mysqli("localhost", "webserver", "empty", "buildmaster");
if ( $mysql -> connect_error ) {
  die_500( "Connection failed: " . $mysql -> connect_error );
}

function print_important_trace_components($call) {
  return substr($call['file'], strlen(BASE)+1) . '(' . $call['line'] . ')';
}

function mysql_log_duration_and_trace($start) {
  $start = round((microtime(true) - $start) * 1000000);
  $trace = debug_backtrace();
  array_shift($trace);
  // silently fail if logfile is unavailable
/*  if (($fp = fopen(BASE . '/log', 'a')) !== false) {
    flock($fp, LOCK_EX);
    fwrite($fp,
      date('Y-m-d H:i:s') . " " .
      $start . " " .
      implode(' ', array_map('print_important_trace_components', $trace)) . " - " .
      $trace[0]['args'][0] . "\n"
    );
    flock($fp, LOCK_UN);
    fclose($fp);
  } */
}

function mysql_run_query($query) {
  global $mysql;
  $start = microtime(true);
  if ( ! $result = $mysql -> query($query) )
    die_500( "Query failed: " .  $mysql -> error );
  mysql_log_duration_and_trace($start);
  return $result;
}

function mysql_prepare_query($query) {
  global $mysql;
  $start = microtime(true);
  if ( ! $result = $mysql -> prepare($query) )
    die_500( "Prepare failed: " . $mysql -> error );
  mysql_log_duration_and_trace($start);
  return $result;
}

function show_warning_on_offline_slave() {
  $result = mysql_run_query("SHOW STATUS LIKE \"Slave_running\"");
  if (($result -> num_rows == 0) ||
    ($result -> fetch_assoc() ["Value"] != "ON")) {
    print "<div><font color=\"ff0000\">The replication slave is currently not running. The database might be outdated.</font></div>\n";
  }
}

function mysql_url_encode($input) {
  return
    "REPLACE(" . $input . ",\"+\",\"%2B\")";
}

function mysql_query_package_version($table) {
  return
    "CONCAT(" .
      "IF(" .
        "`" .$table . "`.`epoch`=\"0\"," .
        "\"\"," .
        "CONCAT(" .
          "`" . $table . "`.`epoch`," .
          "\":\"" .
        ")" .
      ")," .
      "`" . $table . "`.`pkgver`,\"-\"," .
      "`" . $table . "`.`pkgrel`," .
      "IF(`" . $table . "`.`sub_pkgrel_omitted`," .
        "\"\"," .
        "CONCAT(" .
          "\".\"," .
          "`" . $table . "`.`sub_pkgrel`" .
        ")" .
      ")" .
    ")";
}

function arch_filter_query($table) {
  $arch_filter="`" . $table . "`.`name` IN (\"\"";
  foreach (explode("&", $_SERVER["QUERY_STRING"]) as $param) {
    if (strpos($param, "arch=")!==0)
      continue;
    $arch_filter .= ",from_base64(\"" . base64_encode(substr($param,5)) . "\")";
  }
  $arch_filter .= ")";
  return $arch_filter;
}

function abort_iff_webspider() {
  $is_a_bot = in_array(
    $_SERVER['HTTP_USER_AGENT'],
    array(
      'Mozilla/5.0 (compatible; AhrefsBot/6.1; +http://ahrefs.com/robot/)',
      'Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)',
      "'Mozilla/5.0 (compatible; DuckDuckBot-Https/1.1; https://duckduckgo.com/duckduckbot)'",
      'Mozilla/5.0 (compatible; SeznamBot/3.2; +http://napoveda.seznam.cz/en/seznambot-intro/)',
      'Mozilla/5.0 (Compatible; Supybot 2019.02.23)',
      'Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots)',
      'Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.96 Mobile Safari/537.36 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)',
      'ZoominfoBot (zoominfobot at zoominfo dot com)'
    )
  );
  if (($fp = fopen(BASE . '/user-agent-log', 'a')) !== false) {
    flock($fp, LOCK_EX);
    fwrite($fp,
      date('Y-m-d H:i:s') . " " . ($is_a_bot ? 'bot' : 'human') . " " .
      $_SERVER['HTTP_USER_AGENT'] . "\n"
    );
    flock($fp, LOCK_UN);
    fclose($fp);
  }
  if ($is_a_bot) {
    include_once BASE . "/lib/http.php";
    throw_http_error(403, 'Forbidden', 'Access forbidden for bots');
  }
}