<?php
// $Id$

require_once 'DB.php';

function db_connect($url) {
  global $db_handle;

  $db_handle = DB::connect($url);

  if (DB::isError($db_handle)) {
    die("Database problem: ". $db_handle->getMessage());
  }

  $db_handle->setFetchMode(DB_FETCHMODE_ASSOC);
}

/**
 * Runs a query in the database.
 *
 * @param $query SQL query, followed by a variable number of arguments which
 *   are substituted into query by sprintf.
 * @return a DB_Result object or a DB_Error
 */
function db_query($query) {

  $args = func_get_args();

  $query = db_prefix_tables($query);
  if (count($args) > 1) {
    if(is_array($args[1])){
      $args1 = array_map("check_query", $args[1]);
      $nargs = array_merge(array($query), $args1);
    }
    else {
      $nargs = array_map("check_query", $args);
      $nargs[0] = $query;
    }
    return _db_query(call_user_func_array("sprintf", $nargs));
  }
  else {
    return _db_query($query);
  }
}

// debug version
function db_queryd($query) {
  $args = func_get_args();
  $query = db_prefix_tables($query);
  if (count($args) > 1) {
    if(is_array($args[1])){
      $args1 = array_map("check_query", $args[1]);
      $nargs = array_merge(array($query), $args1);
    }
    else {
      $nargs = array_map("check_query", $args);
      $nargs[0] = $query;
    }
    return _db_query(call_user_func_array("sprintf", $nargs), 1);
  }
  else {
    return _db_query($query, 1);
  }
}

// private
function _db_query($query, $debug = 0) {
  global $db_handle, $queries;

  if (variable_get("dev_query", 0)) {
    list($usec, $sec) = explode(" ", microtime());
    $timer = (float)$usec + (float)$sec;
  }

  $result = $db_handle->query($query);

  if (variable_get("dev_query", 0)) {
    list($usec, $sec) = explode(" ", microtime());
    $stop = (float)$usec + (float)$sec;
    $diff = $stop - $timer;
    $queries[] = array($query, $diff);
  }

  if ($debug) {
    print "<p>query: $query</p>";
  }

  if (DB::isError($result)) {
    trigger_error($result->getMessage() ."\nquery: ". htmlspecialchars($query), E_USER_ERROR);
  }
  else {
    return $result;
  }
}

function db_fetch_object($result) {
  if ($result) {
    return $result->fetchRow(DB_FETCHMODE_OBJECT);
  }
}

function db_fetch_array($result) {
  if ($result) {
    return $result->fetchRow(DB_FETCHMODE_ASSOC);
  }
}

function db_num_rows($result) {
  if ($result) {
    return $result->numRows($result);
  }
}

function db_result($result, $row = 0) {
  if ($result && $result->numRows($result) > $row) {
    $tmp = $result->fetchRow(DB_FETCHMODE_ORDERED);
    return $tmp[$row];
  }
}

function db_error() {
  global $db_handle;

  return DB::isError($db_handle);
}

function db_next_id($name) {
  global $db_handle;

  $name = db_prefix_tables($name);
  $result = $db_handle->nextID($name);
  if (DB::isError($result)) {
    watchdog("error", "database: ". $result->getMessage() ."\nsequence table: $name");
  }
  else {
    return $result;
  }
}

function db_affected_rows() {
  global $db_handle;

  return $db_handle->affectedRows();
}

/**
 * Runs a LIMIT query in the database.
 *
 * @param $query SQL query followed by a variable number of arguments which
 *   are substituted into query by sprintf, followed by 'from' and 'count'
 *   parameters. 'from' is the row to start fetching, 'count' the numbers of
 *   rows to fetch.
 * @return a DB_Result object or a DB_Error
 */
function db_query_range($query) {
  global $db_handle, $queries;

  if (variable_get("dev_query", 0)) {
    list($usec, $sec) = explode(" ", microtime());
    $timer = (float)$usec + (float)$sec;
  }

  $args = func_get_args();
  $count = array_pop($args);
  $from = array_pop($args);
  if (count(func_get_args()) > 3) {
    $args = array_map("check_query", $args);
    $query = db_prefix_tables($query);
    $args[0] = $query;
    $result = $db_handle->limitQuery(call_user_func_array("sprintf", $args), $from, $count);
  }
  else {
    $query = func_get_arg(0);
    $query = db_prefix_tables($query);
    $result = $db_handle->limitQuery( $query, $from, $count);
  }

  if (variable_get("dev_query", 0)) {
    list($usec, $sec) = explode(" ", microtime());
    $stop = (float)$usec + (float)$sec;
    $diff = $stop - $timer;
    $queries[] = array($query. " [LIMIT $from, $count]", $diff);
  }

  if (DB::isError($result)) {
    watchdog("error", "database: ". $result->getMessage() ."\nquery: ". htmlspecialchars($query));
  }
  else {
    return $result;
  }
}

?>