<?php

// Installation/upgrade file	
define('VERSION', 'v0.9.6-dev-10');

require 'inc/functions.php';

$step = isset($_GET['step']) ? round($_GET['step']) : 0;
$page = array(
	'config' => $config,
	'title' => 'Install',
	'body' => '',
	'nojavascript' => true
);

// this breaks the dispaly of licenses if enabled
$config['minify_html'] = false;

if (file_exists($config['has_installed'])) {
	
	// Check the version number
	$version = trim(file_get_contents($config['has_installed']));
	if (empty($version))
		$version = 'v0.9.1';
	
	$boards = listBoards();
	
	switch ($version) {
		case 'v0.9':
		case 'v0.9.1':
			// Upgrade to v0.9.2-dev
			
			foreach ($boards as &$_board) {
				// Add `capcode` field after `trip`
				query(sprintf("ALTER TABLE `posts_%s` ADD  `capcode` VARCHAR( 50 ) NULL AFTER  `trip`", $_board['uri'])) or error(db_error());
				
				// Resize `trip` to 15 characters
				query(sprintf("ALTER TABLE `posts_%s` CHANGE  `trip`  `trip` VARCHAR( 15 ) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL", $_board['uri'])) or error(db_error());
			}
		case 'v0.9.2-dev':
			// Upgrade to v0.9.2-dev-1
			
			// New table: `theme_settings`
			query("CREATE TABLE IF NOT EXISTS `theme_settings` ( `name` varchar(40) NOT NULL, `value` text, UNIQUE KEY `name` (`name`)) ENGINE=InnoDB DEFAULT CHARSET=utf8;") or error(db_error());
			
			// New table: `news`
			query("CREATE TABLE IF NOT EXISTS `news` ( `id` int(11) NOT NULL AUTO_INCREMENT, `name` text NOT NULL, `time` int(11) NOT NULL, `subject` text NOT NULL, `body` text NOT NULL, UNIQUE KEY `id` (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=1;") or error(db_error());
		case 'v0.9.2.1-dev':
		case 'v0.9.2-dev-1':
			// Fix broken version number/mistake
			$version = 'v0.9.2-dev-1';
			// Upgrade to v0.9.2-dev-2
			
			foreach ($boards as &$_board) {
				// Increase field sizes
				query(sprintf("ALTER TABLE `posts_%s` CHANGE  `subject` `subject` VARCHAR( 50 ) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL", $_board['uri'])) or error(db_error());
				query(sprintf("ALTER TABLE `posts_%s` CHANGE  `name` `name` VARCHAR( 35 ) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL", $_board['uri'])) or error(db_error());
			}
		case 'v0.9.2-dev-2':
			// Upgrade to v0.9.2-dev-3 (v0.9.2)
			
			foreach ($boards as &$_board) {
				// Add `custom_fields` field
				query(sprintf("ALTER TABLE `posts_%s` ADD `embed` TEXT NULL", $_board['uri'])) or error(db_error());
			}
		case 'v0.9.2-dev-3': // v0.9.2-dev-3 == v0.9.2
		case 'v0.9.2':
			// Upgrade to v0.9.3-dev-1
			
			// Upgrade `theme_settings` table
			query("TRUNCATE TABLE `theme_settings`") or error(db_error());
			query("ALTER TABLE  `theme_settings` ADD  `theme` VARCHAR( 40 ) NOT NULL FIRST") or error(db_error());
			query("ALTER TABLE  `theme_settings` CHANGE  `name`  `name` VARCHAR( 40 ) CHARACTER SET utf8 COLLATE utf8_general_ci NULL") or error(db_error());
			query("ALTER TABLE  `theme_settings` DROP INDEX  `name`") or error(db_error());
		case 'v0.9.3-dev-1':
			query("ALTER TABLE  `mods` ADD  `boards` TEXT NOT NULL") or error(db_error());
			query("UPDATE `mods` SET `boards` = '*'") or error(db_error());
		case 'v0.9.3-dev-2':
			foreach ($boards as &$_board) {
				query(sprintf("ALTER TABLE `posts_%s` CHANGE `filehash`  `filehash` TEXT CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL", $_board['uri'])) or error(db_error());
			}
		case 'v0.9.3-dev-3':
			// Board-specifc bans
			query("ALTER TABLE `bans` ADD  `board` SMALLINT NULL AFTER  `reason`") or error(db_error());
		case 'v0.9.3-dev-4':
			// add ban ID
			query("ALTER TABLE `bans` ADD  `id` INT NOT NULL AUTO_INCREMENT FIRST, ADD PRIMARY KEY ( `id` ), ADD UNIQUE (`id`)");
		case 'v0.9.3-dev-5':
			foreach ($boards as &$_board) {
				// Increase subject field size
				query(sprintf("ALTER TABLE `posts_%s` CHANGE  `subject` `subject` VARCHAR( 100 ) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL", $_board['uri'])) or error(db_error());
			}
		case 'v0.9.3-dev-6':
			// change to MyISAM
			$tables = array(
				'bans', 'boards', 'ip_notes', 'modlogs', 'mods', 'mutes', 'noticeboard', 'pms', 'reports', 'robot', 'theme_settings', 'news'
			);
			foreach ($boards as &$board) {
				$tables[] = "posts_{$board['uri']}";
			}
			
			foreach ($tables as &$table) {
				query("ALTER TABLE  `{$table}` ENGINE = MYISAM DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci") or error(db_error());
			}
		case 'v0.9.3-dev-7':
			foreach ($boards as &$board) {
				query(sprintf("ALTER TABLE  `posts_%s` CHANGE  `filename` `filename` TEXT CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL", $board['uri'])) or error(db_error());
			}
		case 'v0.9.3-dev-8':
			foreach ($boards as &$board) {
				query(sprintf("ALTER TABLE `posts_%s` ADD INDEX (  `thread` )", $board['uri'])) or error(db_error());
			}
		case 'v0.9.3-dev-9':
			foreach ($boards as &$board) {
				query(sprintf("ALTER TABLE `posts_%s`ADD INDEX (  `time` )", $board['uri'])) or error(db_error());
				query(sprintf("ALTER TABLE `posts_%s`ADD FULLTEXT (`body`)", $board['uri'])) or error(db_error());
			}
		case 'v0.9.3-dev-10':
		case 'v0.9.3':
			query("ALTER TABLE  `bans` DROP INDEX `id`") or error(db_error());
			query("ALTER TABLE  `pms` DROP INDEX  `id`") or error(db_error());
			query("ALTER TABLE  `boards` DROP PRIMARY KEY") or error(db_error());
			query("ALTER TABLE  `reports` DROP INDEX  `id`") or error(db_error());
			query("ALTER TABLE  `boards` DROP INDEX `uri`") or error(db_error());
			
			query("ALTER IGNORE TABLE  `robot` ADD PRIMARY KEY (`hash`)") or error(db_error());
			query("ALTER TABLE  `bans` ADD FULLTEXT (`ip`)") or error(db_error());
			query("ALTER TABLE  `ip_notes` ADD INDEX (`ip`)") or error(db_error());	
			query("ALTER TABLE  `modlogs` ADD INDEX (`time`)") or error(db_error());
			query("ALTER TABLE  `boards` ADD PRIMARY KEY(`uri`)") or error(db_error());
			query("ALTER TABLE  `mutes` ADD INDEX (`ip`)") or error(db_error());
			query("ALTER TABLE  `news` ADD INDEX (`time`)") or error(db_error());
			query("ALTER TABLE  `theme_settings` ADD INDEX (`theme`)") or error(db_error());
		case 'v0.9.4-dev-1':
			foreach ($boards as &$board) {
				query(sprintf("ALTER TABLE  `posts_%s` ADD  `sage` INT( 1 ) NOT NULL AFTER  `locked`", $board['uri'])) or error(db_error());
			}
		case 'v0.9.4-dev-2':
			if (!isset($_GET['confirm'])) {
				$page['title'] = 'License Change';
				$page['body'] = '<p style="text-align:center">You are upgrading to a version which uses an amended license. The licenses included with Tinyboard distributions prior to this version (v0.9.4-dev-2) are still valid for those versions, but no longer apply to this and newer versions.</p>' .
					'<textarea style="width:700px;height:370px;margin:auto;display:block;background:white;color:black" disabled>' . htmlentities(file_get_contents('LICENSE.md')) . '</textarea>
					<p style="text-align:center">
						<a href="?confirm=1">I have read and understood the agreement. Proceed to upgrading.</a>
					</p>';
				
				file_write($config['has_installed'], 'v0.9.4-dev-2');
				
				break;
			}
		case 'v0.9.4-dev-3':
		case 'v0.9.4-dev-4':
		case 'v0.9.4':
			foreach ($boards as &$board) {
				query(sprintf("ALTER TABLE  `posts_%s`
					CHANGE `subject` `subject` VARCHAR( 100 ) CHARACTER SET utf8 COLLATE utf8_general_ci NULL ,
					CHANGE  `email`  `email` VARCHAR( 30 ) CHARACTER SET utf8 COLLATE utf8_general_ci NULL ,
					CHANGE  `name`  `name` VARCHAR( 35 ) CHARACTER SET utf8 COLLATE utf8_general_ci NULL", $board['uri'])) or error(db_error());
			}
		case 'v0.9.5-dev-1':
			foreach ($boards as &$board) {
				query(sprintf("ALTER TABLE  `posts_%s` ADD  `body_nomarkup` TEXT NULL AFTER  `body`", $board['uri'])) or error(db_error());
			}
			query("CREATE TABLE IF NOT EXISTS `cites` (  `board` varchar(8) NOT NULL,  `post` int(11) NOT NULL,  `target_board` varchar(8) NOT NULL,  `target` int(11) NOT NULL,  KEY `target` (`target_board`,`target`),  KEY `post` (`board`,`post`)) ENGINE=MyISAM DEFAULT CHARSET=utf8;") or error(db_error());
		case 'v0.9.5-dev-2':
			query("ALTER TABLE  `boards` 
				CHANGE  `uri`  `uri` VARCHAR( 15 ) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
				CHANGE  `title`  `title` VARCHAR( 40 ) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
				CHANGE  `subtitle`  `subtitle` VARCHAR( 120 ) CHARACTER SET utf8 COLLATE utf8_general_ci NULL") or error(db_error());
		case 'v0.9.5-dev-3':
			// v0.9.5
		case 'v0.9.5':
			query("ALTER TABLE  `boards` 
				CHANGE  `uri`  `uri` VARCHAR( 50 ) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
				CHANGE  `title`  `title` TINYTEXT CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
				CHANGE  `subtitle`  `subtitle` TINYTEXT CHARACTER SET utf8 COLLATE utf8_general_ci NULL") or error(db_error());
		case 'v0.9.6-dev-1':
			query("CREATE TABLE IF NOT EXISTS `antispam` (
				  `board` varchar(255) NOT NULL,
				  `thread` int(11) DEFAULT NULL,
				  `hash` bigint(20) NOT NULL,
				  `created` int(11) NOT NULL,
				  `expires` int(11) DEFAULT NULL,
				  `passed` smallint(6) NOT NULL,
				  PRIMARY KEY (`hash`),
				  KEY `board` (`board`,`thread`)
				) ENGINE=MyISAM DEFAULT CHARSET=utf8;") or error(db_error());
		case 'v0.9.6-dev-2':
			query("ALTER TABLE `boards`
				DROP `id`,
				CHANGE  `uri`  `uri` VARCHAR( 120 ) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL") or error(db_error());
			query("ALTER TABLE  `bans` CHANGE  `board`  `board` VARCHAR( 120 ) NULL DEFAULT NULL") or error(db_error());
			query("ALTER TABLE  `reports` CHANGE  `board`  `board` VARCHAR( 120 ) NULL DEFAULT NULL") or error(db_error());
			query("ALTER TABLE  `modlogs` CHANGE  `board`  `board` VARCHAR( 120 ) NULL DEFAULT NULL") or error(db_error());
			foreach ($boards as $board) {
				$query = prepare("UPDATE `bans` SET `board` = :newboard WHERE `board` = :oldboard");
				$query->bindValue(':newboard', $board['uri']);
				$query->bindValue(':oldboard', $board['id']);
				$query->execute() or error(db_error($query));
				
				$query = prepare("UPDATE `modlogs` SET `board` = :newboard WHERE `board` = :oldboard");
				$query->bindValue(':newboard', $board['uri']);
				$query->bindValue(':oldboard', $board['id']);
				$query->execute() or error(db_error($query));
				
				$query = prepare("UPDATE `reports` SET `board` = :newboard WHERE `board` = :oldboard");
				$query->bindValue(':newboard', $board['uri']);
				$query->bindValue(':oldboard', $board['id']);
				$query->execute() or error(db_error($query));
			}
		case 'v0.9.6-dev-3':
			query("ALTER TABLE  `antispam` CHANGE  `hash`  `hash` CHAR( 40 ) NOT NULL") or error(db_error());
		case 'v0.9.6-dev-4':
			query("ALTER TABLE  `news` DROP INDEX  `id`, ADD PRIMARY KEY ( `id` )") or error(db_error());
		case 'v0.9.6-dev-5':
			query("ALTER TABLE  `bans` CHANGE  `id`  `id` INT( 11 ) UNSIGNED NOT NULL AUTO_INCREMENT") or error(db_error());
			query("ALTER TABLE  `mods` CHANGE  `id`  `id` INT( 11 ) UNSIGNED NOT NULL AUTO_INCREMENT") or error(db_error());
			query("ALTER TABLE  `news` CHANGE  `id`  `id` INT( 11 ) UNSIGNED NOT NULL AUTO_INCREMENT") or error(db_error());
			query("ALTER TABLE  `noticeboard` CHANGE  `id`  `id` INT( 11 ) UNSIGNED NOT NULL AUTO_INCREMENT") or error(db_error());
			query("ALTER TABLE  `pms` CHANGE  `id`  `id` INT( 11 ) UNSIGNED NOT NULL AUTO_INCREMENT") or error(db_error());
			query("ALTER TABLE  `reports` CHANGE  `id`  `id` INT( 11 ) UNSIGNED NOT NULL AUTO_INCREMENT") or error(db_error());
			foreach ($boards as $board) {
				query(sprintf("ALTER TABLE  `posts_%s` CHANGE `id`  `id` INT( 11 ) UNSIGNED NOT NULL AUTO_INCREMENT", $board['uri'])) or error(db_error());
			}
		case 'v0.9.6-dev-6':
			foreach ($boards as &$_board) {
				query(sprintf("CREATE INDEX `thread_id` ON `posts_%s` (`thread`, `id`)", $_board['uri'])) or error(db_error());
				query(sprintf("ALTER TABLE `posts_%s` DROP INDEX `thread`", $_board['uri'])) or error(db_error());
			}
		case 'v0.9.6-dev-7':
			query("ALTER TABLE  `bans` ADD  `seen` BOOLEAN NOT NULL") or error(db_error());
		case 'v0.9.6-dev-8':
			query("ALTER TABLE  `mods` CHANGE  `password`  `password` CHAR( 64 ) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT  'SHA256'") or error(db_error());
			query("ALTER TABLE  `mods` ADD  `salt` CHAR( 32 ) NOT NULL AFTER  `password`") or error(db_error());
			$query = query("SELECT `id`,`password` FROM `mods`") or error(db_error());
			while ($user = $query->fetch(PDO::FETCH_ASSOC)) {
				if (strlen($user['password']) == 40) {
					mt_srand(microtime(true) * 100000 + memory_get_usage(true));
					$salt = md5(uniqid(mt_rand(), true));
			
					$user['salt'] = $salt;
					$user['password'] = hash('sha256', $user['salt'] . $user['password']);
			
					$_query = prepare("UPDATE `mods` SET `password` = :password, `salt` = :salt WHERE `id` = :id");
					$_query->bindValue(':id', $user['id']);
					$_query->bindValue(':password', $user['password']);
					$_query->bindValue(':salt', $user['salt']);
					$_query->execute() or error(db_error($_query));
				}
			}
		case 'v0.9.6-dev-9':
			function __query($sql) {
				if (mysql_version() >= 50503)
					return query($sql);
				else
					return query(str_replace('utf8mb4', 'utf8', $sql));
			}
			
			foreach ($boards as &$board) {
				__query(sprintf("ALTER TABLE `posts_%s`
					CHANGE `subject` `subject` VARCHAR(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
					CHANGE `email` `email` VARCHAR(30) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
					CHANGE `name` `name` VARCHAR(35) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
					CHANGE `trip` `trip` VARCHAR(15) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
					CHANGE `capcode` `capcode` VARCHAR(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
					CHANGE `body` `body` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL,
					CHANGE `body_nomarkup` `body_nomarkup` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
					CHANGE `thumb` `thumb` VARCHAR(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
					CHANGE `thumbwidth` `thumbwidth` INT(11) NULL DEFAULT NULL,
					CHANGE `thumbheight` `thumbheight` INT(11) NULL DEFAULT NULL,
					CHANGE `file` `file` VARCHAR(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
					CHANGE `filename` `filename` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
					CHANGE `filehash` `filehash` TEXT CHARACTER SET ascii COLLATE ascii_general_ci NULL DEFAULT NULL,
					CHANGE `password` `password` VARCHAR(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
					CHANGE `ip` `ip` VARCHAR(39) CHARACTER SET ascii COLLATE ascii_general_ci NOT NULL,
					CHANGE `embed` `embed` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
					DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;", $board['uri'])) or error(db_error());
			}
			
			__query("ALTER TABLE  `antispam`
				CHANGE  `board`  `board` VARCHAR( 120 ) CHARACTER SET ASCII COLLATE ascii_general_ci NOT NULL ,
				CHANGE  `hash`  `hash` CHAR( 40 ) CHARACTER SET ASCII COLLATE ascii_bin NOT NULL ,
				DEFAULT CHARACTER SET ASCII COLLATE ascii_bin;") or error(db_error());
			__query("ALTER TABLE  `bans`
				CHANGE  `ip`  `ip` VARCHAR( 39 ) CHARACTER SET ASCII COLLATE ascii_general_ci NOT NULL ,
				CHANGE  `reason`  `reason` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL ,
				CHANGE  `board`  `board` VARCHAR( 120 ) CHARACTER SET ASCII COLLATE ascii_general_ci NULL DEFAULT NULL,
				DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;") or error(db_error());
			__query("ALTER TABLE  `boards`
				CHANGE  `uri`  `uri` VARCHAR( 120 ) CHARACTER SET ASCII COLLATE ascii_general_ci NOT NULL ,
				CHANGE  `title`  `title` TINYTEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL ,
				CHANGE  `subtitle`  `subtitle` TINYTEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
				DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;") or error(db_error());
			__query("ALTER TABLE  `cites`
				CHANGE  `board`  `board` VARCHAR( 120 ) CHARACTER SET ASCII COLLATE ascii_general_ci NOT NULL ,
				CHANGE  `target_board`  `target_board` VARCHAR( 120 ) CHARACTER SET ASCII COLLATE ascii_general_ci NOT NULL ,
				DEFAULT CHARACTER SET ASCII COLLATE ascii_general_ci;") or error(db_error());
			__query("ALTER TABLE  `ip_notes`
				CHANGE  `ip`  `ip` VARCHAR( 39 ) CHARACTER SET ASCII COLLATE ascii_general_ci NOT NULL ,
				CHANGE  `body`  `body` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL ,
				DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;") or error(db_error());
			__query("ALTER TABLE  `ip_notes`
				CHANGE  `ip`  `ip` VARCHAR( 39 ) CHARACTER SET ASCII COLLATE ascii_general_ci NOT NULL ,
				CHANGE  `body`  `body` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL ,
				DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;") or error(db_error());
			__query("ALTER TABLE  `modlogs`
				CHANGE  `ip`  `ip` VARCHAR( 39 ) CHARACTER SET ASCII COLLATE ascii_general_ci NOT NULL ,
				CHANGE  `board`  `board` VARCHAR( 120 ) CHARACTER SET ASCII COLLATE ascii_general_ci NULL DEFAULT NULL ,
				CHANGE  `text`  `text` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL ,
				DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;") or error(db_error());
			__query("ALTER TABLE  `mods`
				CHANGE  `username`  `username` VARCHAR( 30 ) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL ,
				CHANGE  `password`  `password` CHAR( 64 ) CHARACTER SET ASCII COLLATE ascii_general_ci NOT NULL COMMENT 'SHA256',
				CHANGE  `salt`  `salt` CHAR( 32 ) CHARACTER SET ASCII COLLATE ascii_general_ci NOT NULL ,
				CHANGE  `boards`  `boards` TEXT CHARACTER SET ASCII COLLATE ascii_general_ci NOT NULL ,
				DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;") or error(db_error());
			__query("ALTER TABLE  `mutes`
				CHANGE  `ip`  `ip` VARCHAR( 39 ) CHARACTER SET ASCII COLLATE ascii_general_ci NOT NULL ,
				DEFAULT CHARACTER SET ASCII COLLATE ascii_general_ci;") or error(db_error());
			__query("ALTER TABLE  `news`
				CHANGE  `name`  `name` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL ,
				CHANGE  `subject`  `subject` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL ,
				CHANGE  `body`  `body` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL ,
				DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;") or error(db_error());
			__query("ALTER TABLE  `noticeboard`
				CHANGE  `subject`  `subject` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL ,
				CHANGE  `body`  `body` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL ,
				DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;") or error(db_error());
			__query("ALTER TABLE  `pms`
				CHANGE  `message`  `message` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL ,
				DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;") or error(db_error());
			__query("ALTER TABLE  `reports`
				CHANGE  `ip`  `ip` VARCHAR( 39 ) CHARACTER SET ASCII COLLATE ascii_general_ci NOT NULL ,
				CHANGE  `board`  `board` VARCHAR( 120 ) CHARACTER SET ASCII COLLATE ascii_general_ci NULL DEFAULT NULL ,
				CHANGE  `reason`  `reason` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL ,
				DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;") or error(db_error());
			__query("ALTER TABLE  `robot`
				CHANGE  `hash`  `hash` VARCHAR( 40 ) CHARACTER SET ASCII COLLATE ascii_bin NOT NULL COMMENT  'SHA1',
				DEFAULT CHARACTER SET ASCII COLLATE ascii_bin;") or error(db_error());
			__query("ALTER TABLE  `theme_settings`
				CHANGE  `theme`  `theme` VARCHAR( 40 ) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL ,
				CHANGE  `name`  `name` VARCHAR( 40 ) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL ,
				CHANGE  `value`  `value` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL ,
				DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;") or eror(db_error());
		case false:
			// Update version number
			file_write($config['has_installed'], VERSION);
			
			$page['title'] = 'Upgraded';
			$page['body'] = '<p style="text-align:center">Successfully upgraded from ' . $version . ' to <strong>' . VERSION . '</strong>.</p>';
			break;
		default:
			$page['title'] = 'Unknown version';
			$page['body'] = '<p style="text-align:center">Tinyboard was unable to determine what version is currently installed.</p>';
			break;
		case VERSION:
			$page['title'] = 'Already installed';
			$page['body'] = '<p style="text-align:center">It appears that Tinyboard is already installed (' . $version . ') and there is nothing to upgrade! Delete <strong>' . $config['has_installed'] . '</strong> to reinstall.</p>';
			break;
	}			
	
	die(Element('page.html', $page));
}

if ($step == 0) {
	// Agreeement
	$page['body'] = '
	<textarea style="width:700px;height:370px;margin:auto;display:block;background:white;color:black" disabled>' . htmlentities(file_get_contents('LICENSE.md')) . '</textarea>
	<p style="text-align:center">
		<a href="?step=1">I have read and understood the agreement. Proceed to installation.</a>
	</p>';
	
	echo Element('page.html', $page);
} elseif ($step == 1) {
	$page['title'] = 'Pre-installation test';
	
	$page['body'] = '<table class="test">';
	
	function rheader($item) {
		global $page, $config;
		
		$page['body'] .= '<tr class="h"><th colspan="2">' . $item . '</th></tr>';
	}
	
	function row($item, $result) {
		global $page, $config, $__is_error;
		if (!$result)
			$__is_error = true;
		$page['body'] .= '<tr><th>' . $item . '</th><td><img style="width:16px;height:16px" src="' . $config['dir']['static'] . ($result ? 'ok.png' : 'error.png') . '" /></td></tr>';
	}
	
	
	// Required extensions
	rheader('PHP extensions');
	row('PDO', extension_loaded('pdo'));
	row('GD', extension_loaded('gd'));
	
	// GD tests
	rheader('GD tests');
	row('JPEG', function_exists('imagecreatefromjpeg'));
	row('PNG', function_exists('imagecreatefrompng'));
	row('GIF', function_exists('imagecreatefromgif'));
	
	// Database drivers
	$drivers = PDO::getAvailableDrivers();
	
	rheader('PDO drivers <em>(currently installed drivers)</em>');
	foreach ($drivers as &$driver) {
		row($driver, true);
	}
	
	// Permissions
	rheader('File permissions');
	row('<em>root directory</em> (' . getcwd() . ')', is_writable('.'));
	
	$page['body'] .= '</table>
	<p style="text-align:center">
		<a href="?step=2"' .
			(isset($__is_error) ? ' onclick="return confirm(\'Are you sure you want to continue when errors exist?\')"' : '') .
		'>Continue' . (isset($__is_error) ? ' anyway' : '') . '</a>
	</p>';
	
	echo Element('page.html', $page);
} elseif ($step == 2) {
	// Basic config
	$page['title'] = 'Configuration';
	
	function create_salt() {
		return substr(base64_encode(sha1(rand())), 0, rand(25, 31));
	}
	
	$page['body'] = '
<form action="?step=3" method="post">
	<fieldset>
	<legend>Database</legend>
		<label for="db_type">Type:</label> 
		<select id="db_type" name="db[type]">';
		
		$drivers = PDO::getAvailableDrivers();
		
		foreach ($drivers as &$driver) {
			$driver_txt = $driver;
			switch ($driver) {
				case 'cubrid':
					$driver_txt = 'Cubrid';
					break;
				case 'dblib':
					$driver_txt = 'FreeTDS / Microsoft SQL Server / Sybase';
					break;
				case 'firebird':
					$driver_txt = 'Firebird/Interbase 6';
					break;
				case 'ibm':
					$driver_txt = 'IBM DB2';
					break;
				case 'informix':
					$driver_txt = 'IBM Informix Dynamic Server';
					break;
				case 'mysql':
					$driver_txt = 'MySQL';
					break;
				case 'oci':
					$driver_txt = 'OCI';
					break;
				case 'odbc':
					$driver_txt = 'ODBC v3 (IBM DB2, unixODBC)';
					break;
				case 'pgsql':
					$driver_txt = 'PostgreSQL';
					break;
				case 'sqlite':
					$driver_txt = 'SQLite 3';
					break;
				case 'sqlite2':
					$driver_txt = 'SQLite 2';
					break;
			}
			$page['body'] .= '<option value="' . $driver . '">' . $driver_txt . '</option>';
		}
		
		$page['body'] .= '	
		</select>
		
		<label for="db_server">Server:</label> 
		<input type="text" id="db_server" name="db[server]" value="localhost" />
		
		<label for="db_db">Database:</label> 
		<input type="text" id="db_db" name="db[database]" value="" />
		
		<label for="db_user">Username:</label> 
		<input type="text" id="db_user" name="db[user]" value="" />
		
		<label for="db_pass">Password:</label> 
		<input type="password" id="db_pass" name="db[password]" value="" />
	</fieldset>
	<p style="text-align:center" class="unimportant">The following is all later configurable. For more options, <a href="http://tinyboard.org/docs/?p=Config">edit your configuration files</a> after installing.</p>
	<fieldset>
	<legend>Cookies</legend>
		<label for="cookies_mod">Moderator cookie:</label> 
		<input type="text" id="cookies_mod" name="cookies[mod]" value="' . $config['cookies']['mod'] . '" />
		
		<label for="cookies_salt">Secure salt:</label> 
		<input type="text" id="cookies_salt" name="cookies[salt]" value="' . create_salt() . '" size="40" />
	</fieldset>
	
	<fieldset>
	<legend>Flood control</legend>
		<label for="flood_time">Seconds before each post:</label> 
		<input type="text" id="flood_time" name="flood_time" value="' . $config['flood_time'] . '" />
		
		<label for="flood_time_ip">Seconds before you can repost something (post the exact same text):</label> 
		<input type="text" id="flood_time_ip" name="flood_time_ip" value="' . $config['flood_time_ip'] . '" />
		
		<label for="flood_time_same">Same as above, but with a different IP address:</label> 
		<input type="text" id="flood_time_same" name="flood_time_same" value="' . $config['flood_time_same'] . '" />
		
		<label for="max_body">Maximum post body length:</label> 
		<input type="text" id="max_body" name="max_body" value="' . $config['max_body'] . '" />
		
		<label for="reply_limit">Replies in a thread before it can no longer be bumped:</label> 
		<input type="text" id="reply_limit" name="reply_limit" value="' . $config['reply_limit'] . '" />
		
		<label for="max_links">Maximum number of links in a single post:</label> 
		<input type="text" id="max_links" name="max_links" value="' . $config['max_links'] . '" />			
	</fieldset>
	
	<fieldset>
	<legend>Images</legend>
		<label for="max_filesize">Maximum image filesize:</label> 
		<input type="text" id="max_filesize" name="max_filesize" value="' . $config['max_filesize'] . '" />
		
		<label for="thumb_width">Thumbnail width:</label> 
		<input type="text" id="thumb_width" name="thumb_width" value="' . $config['thumb_width'] . '" />
		
		<label for="thumb_height">Thumbnail height:</label> 
		<input type="text" id="thumb_height" name="thumb_height" value="' . $config['thumb_height'] . '" />
		
		<label for="max_width">Maximum image width:</label> 
		<input type="text" id="max_width" name="max_width" value="' . $config['max_width'] . '" />
		
		<label for="max_height">Maximum image height:</label> 
		<input type="text" id="max_height" name="max_height" value="' . $config['max_height'] . '" />
	</fieldset>
	
	<fieldset>
	<legend>Display</legend>
		<label for="threads_per_page">Threads per page:</label> 
		<input type="text" id="threads_per_page" name="threads_per_page" value="' . $config['threads_per_page'] . '" />
		
		<label for="max_pages">Page limit:</label> 
		<input type="text" id="max_pages" name="max_pages" value="' . $config['max_pages'] . '" />
		
		<label for="threads_preview">Number of replies to show per thread on the index page:</label> 
		<input type="text" id="threads_preview" name="threads_preview" value="' . $config['threads_preview'] . '" />
	</fieldset>
	
	<fieldset>
	<legend>Directories</legend>
		<label for="root">Root URI (include trailing slash):</label> 
		<input type="text" id="root" name="root" value="' . $config['root'] . '" />
		
		<label for="dir_img">Image directory:</label> 
		<input type="text" id="dir_img" name="dir[img]" value="' . $config['dir']['img'] . '" />
		
		<label for="dir_thumb">Thumbnail directory:</label> 
		<input type="text" id="dir_thumb" name="dir[thumb]" value="' . $config['dir']['thumb'] . '" />
		
		<label for="dir_res">Thread directory:</label> 
		<input type="text" id="dir_res" name="dir[res]" value="' . $config['dir']['res'] . '" />
	</fieldset>
	
	<fieldset>
	<legend>Miscellaneous</legend>
		<label for="secure_trip_salt">Secure trip (##) salt:</label> 
		<input type="text" id="secure_trip_salt" name="secure_trip_salt" value="' . create_salt() . '" size="40" />
	</fieldset>
	
	<p style="text-align:center">
		<input type="submit" value="Complete installation" />
	</p>
</form>
	';
	
	
	echo Element('page.html', $page);
} elseif ($step == 3) {
	$instance_config = 
'<?php

/*
*  Instance Configuration
*  ----------------------
*  Edit this file and not config.php for imageboard configuration.
*
*  You can copy values from config.php (defaults) and paste them here.
*/

';
	
	function create_config_from_array(&$instance_config, &$array, $prefix = '') {
		foreach ($array as $name => $value) {
			if (is_array($value)) {
				$instance_config .= "\n";
				create_config_from_array($instance_config, $value, $prefix . '[\'' . addslashes($name) . '\']');
				$instance_config .= "\n";
			} else {
				$instance_config .= '	$config' . $prefix . '[\'' . addslashes($name) . '\'] = ';
				
				if (is_numeric($value))
					$instance_config .= $value;
				else
					$instance_config .= "'" . addslashes($value) . "'";
					
				$instance_config .= ";\n";
			}
		}
	}
	
	create_config_from_array($instance_config, $_POST);
	
	$instance_config .= "\n";
	
	if (@file_put_contents('inc/instance-config.php', $instance_config)) {
		header('Location: ?step=4', true, $config['redirect_http']);
	} else {
		$page['title'] = 'Manual installation required';
		$page['body'] = '
			<p>I couldn\'t write to <strong>inc/instance-config.php</strong> with the new configuration, probably due to a permissions error.</p>
			<p>Please complete the installation manually by copying and pasting the following code into the contents of <strong>inc/instance-config.php</strong>:</p>
			<textarea style="width:700px;height:370px;margin:auto;display:block;background:white;color:black">' . htmlentities($instance_config) . '</textarea>
			<p style="text-align:center">
				<a href="?step=4">Once complete, click here to complete installation.</a>
			</p>
		';
		echo Element('page.html', $page);
	}
} elseif ($step == 4) {
	// SQL installation
	
	buildJavascript();
	
	$sql = @file_get_contents('install.sql') or error("Couldn't load install.sql.");
	
	sql_open();
	if (mysql_version() < 50503)
		$sql = str_replace('utf8', 'utf8mb4', $sql);
	
	// This code is probably horrible, but what I'm trying
	// to do is find all of the SQL queires and put them
	// in an array.
	preg_match_all("/(^|\n)((SET|CREATE|INSERT).+)\n\n/msU", $sql, $queries);
	$queries = $queries[2];
	
	$queries[] = Element('posts.sql', array('board' => 'b'));
	
	$sql_errors = '';
	foreach ($queries as &$query) {
		if (!query($query))
			$sql_errors .= '<li>' . db_error() . '</li>';
	}
	
	$boards = listBoards();
	foreach ($boards as &$_board) {
		setupBoard($_board);
		buildIndex();
	}
	
	$page['title'] = 'Installation complete';
	$page['body'] = '<p style="text-align:center">Thank you for using Tinyboard. Please remember to report any bugs you discover. <a href="http://tinyboard.org/docs/?p=Config">How do I edit the config files?</a></p>';
	
	if (!empty($sql_errors)) {
		$page['body'] .= '<div class="ban"><h2>SQL errors</h2><p>SQL errors were encountered when trying to install the database. This may be the result of using a database which is already occupied with a Tinyboard installation; if so, you can probably ignore this.</p><p>The errors encountered were:</p><ul>' . $sql_errors . '</ul><p><a href="?step=5">Ignore errors and complete installation.</a></p></div>';
	} else {
		file_write($config['has_installed'], VERSION);
		if (!file_unlink(__FILE__)) {
			$page['body'] .= '<div class="ban"><h2>Delete install.php!</h2><p>I couldn\'t remove <strong>install.php</strong>. You will have to remove it manually.</p></div>';
		}
	}
	
	echo Element('page.html', $page);
} elseif ($step == 5) {
	$page['title'] = 'Installation complete';
	$page['body'] = '<p style="text-align:center">Thank you for using Tinyboard. Please remember to report any bugs you discover.</p>';
	
	file_write($config['has_installed'], VERSION);
	if (!file_unlink(__FILE__)) {
		$page['body'] .= '<div class="ban"><h2>Delete install.php!</h2><p>I couldn\'t remove <strong>install.php</strong>. You will have to remove it manually.</p></div>';
	}
	
	echo Element('page.html', $page);
}