gnu-social/install.php

<?php
/**
 * Laconica - a distributed open-source microblogging tool
 * Copyright (C) 2009, Control Yourself, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

define('INSTALLDIR', dirname(__FILE__));

function main()
{
    if (!checkPrereqs())
    {
        return;
    }

    if ($_SERVER['REQUEST_METHOD'] == 'POST') {
        handlePost();
    } else {
        showForm();
    }
}

function checkPrereqs()
{
	$pass = true;

    if (file_exists(INSTALLDIR.'/config.php')) {
         ?><p class="error">Config file &quot;config.php&quot; already exists.</p>
         <?php
        $pass = false;
    }

    if (version_compare(PHP_VERSION, '5.2.3', '<')) {
            ?><p class="error">Require PHP version 5.2.3 or greater.</p><?php
		    $pass = false;
    }

    $reqs = array('gd', 'curl',
                  'xmlwriter', 'mbstring');

    foreach ($reqs as $req) {
        if (!checkExtension($req)) {
            ?><p class="error">Cannot load required extension: <code><?php echo $req; ?></code></p><?php
		    $pass = false;
        }
    }
    if (!checkExtension('pgsql') && !checkExtension('mysql')) {
      ?><p class="error">Cannot find mysql or pgsql extension. You need one or the other: <code><?php echo $req; ?></code></p><?php
                    $pass = false;
    }

	if (!is_writable(INSTALLDIR)) {
         ?><p class="error">Cannot write config file to: <code><?php echo INSTALLDIR; ?></code></p>
	       <p>On your server, try this command: <code>chmod a+w <?php echo INSTALLDIR; ?></code>
         <?php
	     $pass = false;
	}

	// Check the subdirs used for file uploads
	$fileSubdirs = array('avatar', 'background', 'file');
	foreach ($fileSubdirs as $fileSubdir) {
		$fileFullPath = INSTALLDIR."/$fileSubdir/";
		if (!is_writable($fileFullPath)) {
    	     ?><p class="error">Cannot write <?php echo $fileSubdir; ?> directory: <code><?php echo $fileFullPath; ?></code></p>
		       <p>On your server, try this command: <code>chmod a+w <?php echo $fileFullPath; ?></code></p>
	     <?php
		     $pass = false;
		}
	}

	return $pass;
}

function checkExtension($name)
{
    if (!extension_loaded($name)) {
        if (!dl($name.'.so')) {
            return false;
        }
    }
    return true;
}

function showForm()
{
    echo<<<E_O_T
        </ul>
    </dd>
</dl>
<dl id="page_notice" class="system_notice">
    <dt>Page notice</dt>
    <dd>
        <div class="instructions">
            <p>Enter your database connection information below to initialize the database.</p>
        </div>
    </dd>
</dl>
<form method="post" action="install.php" class="form_settings" id="form_install">
    <fieldset>
        <legend>Connection settings</legend>
        <ul class="form_data">
            <li>
                <label for="sitename">Site name</label>
                <input type="text" id="sitename" name="sitename" />
                <p class="form_guide">The name of your site</p>
            </li>
            <li>
                <label for="fancy-enable">Fancy URLs</label>
                <input type="radio" name="fancy" id="fancy-enable" value="enable" checked='checked' /> enable<br />
                <input type="radio" name="fancy" id="fancy-disable" value="" /> disable<br />
                <p class="form_guide" id='fancy-form_guide'>Enable fancy (pretty) URLs. Auto-detection failed, it depends on Javascript.</p>
            </li>
            <li>
                <label for="host">Hostname</label>
                <input type="text" id="host" name="host" />
                <p class="form_guide">Database hostname</p>
            </li>
            <li>
            
                <label for="dbtype">Type</label>
                <input type="radio" name="dbtype" id="fancy-mysql" value="mysql" checked='checked' /> MySQL<br />
                <input type="radio" name="dbtype" id="dbtype-pgsql" value="pgsql" /> PostgreSQL<br />
                <p class="form_guide">Database type</p>
            </li>

            <li>
                <label for="database">Name</label>
                <input type="text" id="database" name="database" />
                <p class="form_guide">Database name</p>
            </li>
            <li>
                <label for="username">Username</label>
                <input type="text" id="username" name="username" />
                <p class="form_guide">Database username</p>
            </li>
            <li>
                <label for="password">Password</label>
                <input type="password" id="password" name="password" />
                <p class="form_guide">Database password (optional)</p>
            </li>
        </ul>
        <input type="submit" name="submit" class="submit" value="Submit" />
    </fieldset>
</form>

E_O_T;
}

function updateStatus($status, $error=false)
{
?>
                <li <?php echo ($error) ? 'class="error"': ''; ?>><?php echo $status;?></li>

<?php
}

function handlePost()
{
?>

<?php
    $host     = $_POST['host'];
    $dbtype   = $_POST['dbtype'];
    $database = $_POST['database'];
    $username = $_POST['username'];
    $password = $_POST['password'];
    $sitename = $_POST['sitename'];
    $fancy    = !empty($_POST['fancy']);
    $server = $_SERVER['HTTP_HOST'];
    $path = substr(dirname($_SERVER['PHP_SELF']), 1);
    
?>
    <dl class="system_notice">
        <dt>Page notice</dt>
        <dd>
            <ul>
<?php
	$fail = false;

    if (empty($host)) {
        updateStatus("No hostname specified.", true);
		$fail = true;
    }

    if (empty($database)) {
        updateStatus("No database specified.", true);
		$fail = true;
    }

    if (empty($username)) {
        updateStatus("No username specified.", true);
		$fail = true;
    }

//     if (empty($password)) {
//         updateStatus("No password specified.", true);
// 		$fail = true;
//     }

    if (empty($sitename)) {
        updateStatus("No sitename specified.", true);
		$fail = true;
    }

    if($fail){
            showForm();
        return;
    }
    
    switch($dbtype) {
        case 'mysql':
            $db = mysql_db_installer($host, $database, $username, $password);
            break;
        case 'pgsql':
            $db = pgsql_db_installer($host, $database, $username, $password);
            break;
        default:
    }
    
    if (!$db) {
        // database connection failed, do not move on to create config file.
        return false;
    }
    
    updateStatus("Writing config file...");
    $res = writeConf($sitename, $server, $path, $fancy, $db);
    
    if (!$res) {
        updateStatus("Can't write config file.", true);
        showForm();
        return;
    }
    
    /*
        TODO https needs to be considered
    */
    $link = "http://".$server.'/'.$path;
    
    updateStatus("Laconica has been installed at $link");
    updateStatus("You can visit your <a href='$link'>new Laconica site</a>.");
?>

<?php
}

function pgsql_db_installer($host, $database, $username, $password) {
  $connstring = "dbname=$database host=$host user=$username";

  //No password would mean trust authentication used.
  if (!empty($password)) {
    $connstring .= " password=$password";
  }
  updateStatus("Starting installation...");
  updateStatus("Checking database...");
  $conn = pg_connect($connstring);
  
  if ($conn ===false) {
    updateStatus("Failed to connect to database: $connstring");
    showForm();
    return false;
  }

  //ensure database encoding is UTF8
  $record = pg_fetch_object(pg_query($conn, 'SHOW server_encoding'));
  if ($record->server_encoding != 'UTF8') {
    updateStatus("Laconica requires UTF8 character encoding. Your database is ". htmlentities($record->server_encoding));
    showForm();
    return false;
  }

  updateStatus("Running database script...");
  //wrap in transaction;
  pg_query($conn, 'BEGIN');
  $res = runDbScript(INSTALLDIR.'/db/laconica_pg.sql', $conn, 'pgsql');
  
  if ($res === false) {
      updateStatus("Can't run database script.", true);
      showForm();
      return false;
  }
  foreach (array('sms_carrier' => 'SMS carrier',
                'notice_source' => 'notice source',
                'foreign_services' => 'foreign service')
          as $scr => $name) {
      updateStatus(sprintf("Adding %s data to database...", $name));
      $res = runDbScript(INSTALLDIR.'/db/'.$scr.'.sql', $conn, 'pgsql');
      if ($res === false) {
          updateStatus(sprintf("Can't run %d script.", $name), true);
          showForm();
          return false;
      }
  }
  pg_query($conn, 'COMMIT');

  if (empty($password)) {
    $sqlUrl = "pgsql://$username@$host/$database";
  }
  else {
    $sqlUrl = "pgsql://$username:$password@$host/$database";
  }
  
  $db = array('type' => 'pgsql', 'database' => $sqlUrl);
  
  return $db;
}

function mysql_db_installer($host, $database, $username, $password) {
  updateStatus("Starting installation...");
  updateStatus("Checking database...");

  $conn = mysql_connect($host, $username, $password);
  if (!$conn) {
      updateStatus("Can't connect to server '$host' as '$username'.", true);
      showForm();
      return false;
  }
  updateStatus("Changing to database...");
  $res = mysql_select_db($database, $conn);
  if (!$res) {
      updateStatus("Can't change to database.", true);
      showForm();
      return false;
  }
  updateStatus("Running database script...");
  $res = runDbScript(INSTALLDIR.'/db/laconica.sql', $conn);
  if ($res === false) {
      updateStatus("Can't run database script.", true);
      showForm();
      return false;
  }
  foreach (array('sms_carrier' => 'SMS carrier',
                'notice_source' => 'notice source',
                'foreign_services' => 'foreign service')
          as $scr => $name) {
      updateStatus(sprintf("Adding %s data to database...", $name));
      $res = runDbScript(INSTALLDIR.'/db/'.$scr.'.sql', $conn);
      if ($res === false) {
          updateStatus(sprintf("Can't run %d script.", $name), true);
          showForm();
          return false;
      }
  }
      
      $sqlUrl = "mysqli://$username:$password@$host/$database";
      $db = array('type' => 'mysql', 'database' => $sqlUrl);
      return $db;
}

function writeConf($sitename, $server, $path, $fancy, $db)
{
    // assemble configuration file in a string
    $cfg =  "<?php\n".
            "if (!defined('LACONICA')) { exit(1); }\n\n".
            
            // site name
            "\$config['site']['name'] = '$sitename';\n\n".
            
            // site location
            "\$config['site']['server'] = '$server';\n".
            "\$config['site']['path'] = '$path'; \n\n".
            
            // checks if fancy URLs are enabled
            ($fancy ? "\$config['site']['fancy'] = true;\n\n":'').
            
            // database
            "\$config['db']['database'] = '{$db['database']}';\n\n".
            ($db['type'] == 'pgsql' ? "\$config['db']['quote_identifiers'] = true;\n\n":'').
            "\$config['db']['type'] = '{$db['type']}';\n\n".
            
            "?>";
    // write configuration file out to install directory
    $res = file_put_contents(INSTALLDIR.'/config.php', $cfg);

    return $res;
}

function runDbScript($filename, $conn, $type = 'mysql')
{
    $sql = trim(file_get_contents($filename));
    $stmts = explode(';', $sql);
    foreach ($stmts as $stmt) {
        $stmt = trim($stmt);
        if (!mb_strlen($stmt)) {
            continue;
        }
        switch ($type) {
        case 'mysql':
            $res = mysql_query($stmt, $conn);
            break;
        case 'pgsql':
            $res = pg_query($conn, $stmt);
            break;
        default:
            updateStatus("runDbScript() error: unknown database type ". $type ." provided.");
        }
        if ($res === false) {
            updateStatus("FAILED SQL: $stmt");
            return $res;
        }
    }
    return true;
}

?>
<?php echo"<?"; ?> xml version="1.0" encoding="UTF-8" <?php echo "?>"; ?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en_US" lang="en_US">
    <head>
        <title>Install Laconica</title>
	<link rel="shortcut icon" href="favicon.ico"/>
        <link rel="stylesheet" type="text/css" href="theme/default/css/display.css?version=0.8" media="screen, projection, tv"/>
        <!--[if IE]><link rel="stylesheet" type="text/css" href="theme/base/css/ie.css?version=0.8" /><![endif]-->
        <!--[if lte IE 6]><link rel="stylesheet" type="text/css" theme/base/css/ie6.css?version=0.8" /><![endif]-->
        <!--[if IE]><link rel="stylesheet" type="text/css" href="theme/default/css/ie.css?version=0.8" /><![endif]-->
        <script src="js/jquery.min.js"></script>
        <script src="js/install.js"></script>
    </head>
    <body id="install">
        <div id="wrap">
            <div id="header">
                <address id="site_contact" class="vcard">
                    <a class="url home bookmark" href=".">
                        <img class="logo photo" src="theme/default/logo.png" alt="Laconica"/>
                        <span class="fn org">Laconica</span>
                    </a>
                </address>
            </div>
            <div id="core">
                <div id="content">
                    <h1>Install Laconica</h1>
<?php main(); ?>
                </div>
            </div>
        </div>
    </body>
</html>