install/includes/libenanoinstall.php
author Dan
Wed, 26 Aug 2009 13:04:26 -0400
changeset 1104 299d7e6e328b
parent 1081 745200a9cc2a
child 1144 fcb2be1428e7
permissions -rw-r--r--
Tutorial: improved Creating & Editing page a little bit with respect to wiki formatting stuff
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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<?php
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/*
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 * Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between
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 * Copyright (C) 2006-2009 Dan Fuhry
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 * Installation package
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 * libenanoinstall.php - Installation payload backend
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 *
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 * This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License
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 * as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
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 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
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 */
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$neutral_color = 'C';
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function run_installer_stage($stage_id, $stage_name, $function, $failure_explanation, $allow_skip = true)
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{
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  static $resumed = false;
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  static $resume_stack = array();
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  if ( empty($resume_stack) && isset($_POST['resume_stack']) && preg_match('/[a-z_]+((\|[a-z_]+)+)/', $_POST['resume_stack']) )
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  {
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    $resume_stack = explode('|', $_POST['resume_stack']);
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  }
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  $already_run = false;
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  if ( in_array($stage_id, $resume_stack) )
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  {
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    $already_run = true;
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  }
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  if ( !$resumed )
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  {
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    if ( !isset($_GET['sub']) )
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      $resumed = true;
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    if ( isset($_GET['sub']) && $_GET['sub'] == $stage_id )
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    {
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      $resumed = true;
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    }
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  }
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  if ( !$resumed && $allow_skip )
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  {
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    echo_stage_success($stage_id, $stage_name);
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    return false;
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  }
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  if ( !function_exists($function) )
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    die('libenanoinstall: CRITICAL: function "' . $function . '" for ' . $stage_id . ' doesn\'t exist');
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  $result = call_user_func($function, false, $already_run);
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  if ( $result )
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  {
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    echo_stage_success($stage_id, $stage_name);
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    $resume_stack[] = $stage_id;
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    return true;
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  }
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  else
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  {
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    echo_stage_failure($stage_id, $stage_name, $failure_explanation, $resume_stack);
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    return false;
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  }
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}
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function start_install_table()
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{
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  echo '<table border="0" cellspacing="0" cellpadding="0" style="margin-top: 10px;">' . "\n";
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}
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function close_install_table()
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{
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  echo '</table>' . "\n\n";
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  flush();
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}
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function echo_stage_success($stage_id, $stage_name)
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{
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  global $neutral_color;
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  $neutral_color = ( $neutral_color == 'A' ) ? 'C' : 'A';
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  echo '<tr><td style="width: 500px; background-color: #' . "{$neutral_color}{$neutral_color}FF{$neutral_color}{$neutral_color}" . '; padding: 0 5px;">' . htmlspecialchars($stage_name) . '</td><td style="padding: 0 5px;"><img alt="Done" src="../images/check.png" /></td></tr>' . "\n";
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  flush();
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}
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function echo_stage_failure($stage_id, $stage_name, $failure_explanation, $resume_stack)
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{
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  global $neutral_color;
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  global $lang;
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  $neutral_color = ( $neutral_color == 'A' ) ? 'C' : 'A';
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  echo '<tr><td style="width: 500px; background-color: #' . "FF{$neutral_color}{$neutral_color}{$neutral_color}{$neutral_color}" . '; padding: 0 5px;">' . htmlspecialchars($stage_name) . '</td><td style="padding: 0 5px;"><img alt="Failed" src="../images/checkbad.png" /></td></tr>' . "\n";
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  flush();
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  close_install_table();
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  $post_data = '';
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  $mysql_error = mysql_error();
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  $file = ( defined('IN_ENANO_UPGRADE') ) ? 'upgrade.php' : 'install.php';
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  foreach ( $_POST as $key => $value )
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  {
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    // FIXME: These should really also be sanitized for double quotes
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    $value = htmlspecialchars($value);
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    $key = htmlspecialchars($key);
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    $post_data .= "          <input type=\"hidden\" name=\"$key\" value=\"$value\" />\n";
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  }
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  if ( $stage_id == 'renameconfig' )
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    echo '<p>' . $failure_explanation . '</p>';
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  else
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    echo '<form action="' . $file . '?stage=install&amp;sub=' . $stage_id . '" method="post">
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            ' . $post_data . '
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            <input type="hidden" name="resume_stack" value="' . htmlspecialchars(implode('|', $resume_stack)) . '" />
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            <h3>' . $lang->get('meta_msg_err_stagefailed_title') . '</h3>
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             <p>' . $failure_explanation . '</p>
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             ' . ( !empty($mysql_error) ? "<p>" . $lang->get('meta_msg_err_stagefailed_mysqlerror') . " $mysql_error</p>" : '' ) . '
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             <p>' . $lang->get('meta_msg_err_stagefailed_body') . '</p>
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             <p style="text-align: center;"><input type="submit" value="' . $lang->get('meta_btn_retry_installation') . '" /></p>
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          </form>';
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  global $ui;
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  $ui->show_footer();
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  exit;
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}
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function enano_perform_upgrade($target_branch)
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{
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  global $db, $session, $paths, $template, $plugins; // Common objects
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  // Import version info
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  global $enano_versions;
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  // Import UI functions
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  global $ui;
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  // This is needed for upgrade abstraction
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  global $dbdriver;
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  // see if we're actually supposed to be in post-upgrade
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  if ( getConfig('enano_version') == 'upg-' . installer_enano_version() )
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  {
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    // yep, fall out here to avoid errors
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    return true;
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  }
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  // Main upgrade stage
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  // Init vars
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  list($major_version, $minor_version) = explode('.', installer_enano_version());
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  $installer_branch = "$major_version.$minor_version";
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  $installer_branch = preg_replace('/^upg-/', '', $installer_branch);
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  $target_branch = preg_replace('/^upg-/', '', $target_branch);
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  $version_flipped = array_flip($enano_versions[$target_branch]);
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  $version_curr = enano_version();
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  // Change this to be the last version in the current branch.
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  // If we're just upgrading within this branch, use the version the installer library
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  // reports to us. Else, use the latest in the old (current target) branch.
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  // $version_target = installer_enano_version();
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  $version_target = ( $target_branch === $installer_branch ) ? installer_enano_version() : $enano_versions[$target_branch][ count($enano_versions[$target_branch]) - 1 ];
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  // Calculate which scripts to run
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  if ( !isset($version_flipped[$version_curr]) )
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  {
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    echo '<p>ERROR: Unsupported version</p>';
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    $ui->show_footer();
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    exit;
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  }
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  if ( !isset($version_flipped[$version_target]) )
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  {
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    echo '<p>ERROR: Upgrader doesn\'t support its own version</p>';
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    $ui->show_footer();
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    exit;
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  }
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  $upg_queue = array();
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  for ( $i = $version_flipped[$version_curr]; $i < $version_flipped[$version_target]; $i++ )
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  {
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    if ( !isset($enano_versions[$target_branch][$i + 1]) )
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    {
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      echo '<p>ERROR: Unsupported intermediate version</p>';
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      $ui->show_footer();
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      exit;
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    }
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    $ver_this = $enano_versions[$target_branch][$i];
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    $ver_next = $enano_versions[$target_branch][$i + 1];
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    $upg_queue[] = array($ver_this, $ver_next);
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  }
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  // Verify that all upgrade scripts are usable
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  foreach ( $upg_queue as $verset )
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  {
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    $file = ENANO_ROOT . "/install/schemas/upgrade/{$verset[0]}-{$verset[1]}-$dbdriver.sql";
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    if ( !file_exists($file) )
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    {
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      echo "<p>ERROR: Couldn't find required schema file: $file</p>";
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      $ui->show_footer();
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      exit;
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    }
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  }
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  // Perform upgrade
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  foreach ( $upg_queue as $verset )
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  {
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    $file = ENANO_ROOT . "/install/schemas/upgrade/{$verset[0]}-{$verset[1]}-$dbdriver.sql";
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    try
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    {
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      $parser = new SQL_Parser($file);
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    }
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    catch(Exception $e)
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    {
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      die("<pre>$e</pre>");
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    }
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    $parser->assign_vars(array(
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      'TABLE_PREFIX' => table_prefix
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    ));
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    $sql_list = $parser->parse();
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    // Check for empty schema file
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    if ( $sql_list[0] === ';' && count($sql_list) == 1 )
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    {
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      // It's empty, report success for this version
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      // See below for explanation of why setConfig() is called here
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      setConfig('enano_version', $verset[1]);
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      continue;
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    }
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    foreach ( $sql_list as $sql )
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    {
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      // check for '@' operator on query
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      if ( substr($sql, 0, 1) == '@' )
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      {
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        // Yes - perform query but don't check for errors
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        $db->sql_query($sql);
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      }
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      else
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      {
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        // Perform as normal
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        if ( !$db->sql_query($sql) )
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          $db->_die();
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      }
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    }
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    // Is there an additional script (logic) to be run after the schema?
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    $postscript = ENANO_ROOT . "/install/schemas/upgrade/{$verset[0]}-{$verset[1]}.php";
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    if ( file_exists($postscript) )
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      @include($postscript);
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    // The advantage of calling setConfig on the system version here?
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    // Simple. If the upgrade fails, it will pick up from the last
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    // version, not try to start again from the beginning. This will
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    // still cause errors in most cases though. Eventually we probably
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    // need some sort of query-numbering system that tracks in-progress
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    // upgrades.
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    setConfig('enano_version', $verset[1]);
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  }
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}
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   248