<?php

/*

 * Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between

 * Version 1.1.1

 * Copyright (C) 2006-2007 Dan Fuhry

 * Installation package

 * libenanoinstall.php - Installation payload backend

 *

 * This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied

 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.

 */

$neutral_color = 'C';

function run_installer_stage($stage_id, $stage_name, $function, $failure_explanation, $allow_skip = true)

{

  static $resumed = false;

  static $resume_stack = array();

  if ( empty($resume_stack) && isset($_POST['resume_stack']) && preg_match('/[a-z_]+((\|[a-z_]+)+)/', $_POST['resume_stack']) )

  {

    $resume_stack = explode('|', $_POST['resume_stack']);

  }

  $already_run = false;

  if ( in_array($stage_id, $resume_stack) )

  {

    $already_run = true;

  }

  if ( !$resumed )

  {

    if ( !isset($_GET['sub']) )

      $resumed = true;

    if ( isset($_GET['sub']) && $_GET['sub'] == $stage_id )

    {

      $resumed = true;

    }

  }

  if ( !$resumed && $allow_skip )

  {

    echo_stage_success($stage_id, $stage_name);

    return false;

  }

  if ( !function_exists($function) )

    die('libenanoinstall: CRITICAL: function "' . $function . '" for ' . $stage_id . ' doesn\'t exist');

  $result = @call_user_func($function, false, $already_run);

  if ( $result )

  {

    echo_stage_success($stage_id, $stage_name);

    $resume_stack[] = $stage_id;

    return true;

  }

  else

  {

    echo_stage_failure($stage_id, $stage_name, $failure_explanation, $resume_stack);

    return false;

  }

}

function start_install_table()

{

  echo '<table border="0" cellspacing="0" cellpadding="0" style="margin-top: 10px;">' . "\n";

}

function close_install_table()

{

  echo '</table>' . "\n\n";

  flush();

}

function echo_stage_success($stage_id, $stage_name)

{

  global $neutral_color;

  $neutral_color = ( $neutral_color == 'A' ) ? 'C' : 'A';

  flush();

}

function echo_stage_failure($stage_id, $stage_name, $failure_explanation, $resume_stack)

{

  global $neutral_color;

  global $lang;

  $neutral_color = ( $neutral_color == 'A' ) ? 'C' : 'A';

  flush();

  close_install_table();

  $post_data = '';

  $mysql_error = mysql_error();

  foreach ( $_POST as $key => $value )

  {

    // FIXME: These should really also be sanitized for double quotes

    $value = htmlspecialchars($value);

    $key = htmlspecialchars($key);

    $post_data .= "          <input type=\"hidden\" name=\"$key\" value=\"$value\" />\n";

  }

  if ( $stage_id == 'renameconfig' )

    echo '<p>' . $failure_explanation . '</p>';

  else

    echo '<form action="install.php?stage=install&amp;sub=' . $stage_id . '" method="post">

            ' . $post_data . '

            <input type="hidden" name="resume_stack" value="' . htmlspecialchars(implode('|', $resume_stack)) . '" />

            <h3>' . $lang->get('meta_msg_err_stagefailed_title') . '</h3>

             <p>' . $failure_explanation . '</p>

             ' . ( !empty($mysql_error) ? "<p>" . $lang->get('meta_msg_err_stagefailed_mysqlerror') . " $mysql_error</p>" : '' ) . '

             <p>' . $lang->get('meta_msg_err_stagefailed_body') . '</p>

             <p style="text-align: center;"><input type="submit" value="' . $lang->get('meta_btn_retry_installation') . '" /></p>

          </form>';

  global $ui;

  $ui->show_footer();

  exit;

}

?>