acp_language.php

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				// Get email templates
				$email_templates = filelist($phpbb_root_path . 'language/' . $row['lang_iso'], 'email', 'txt');
				$email_templates = $email_templates['email/'];

				// Get acp files
				$acp_files = filelist($phpbb_root_path . 'language/' . $row['lang_iso'], 'acp', $phpEx);
				$acp_files = $acp_files['acp/'];

				// Get mod files
				$mod_files = filelist($phpbb_root_path . 'language/' . $row['lang_iso'], 'mods', $phpEx);
				$mod_files = (isset($mod_files['mods/'])) ? $mod_files['mods/'] : array();

				// Add main files
				$this->add_to_archive($compress, $this->main_files, $row['lang_iso']);

				// Add search files if they exist...
				if (file_exists($phpbb_root_path . 'language/' . $row['lang_iso'] . '/search_ignore_words.' . $phpEx))
				{
					$this->add_to_archive($compress, array("search_ignore_words.$phpEx"), $row['lang_iso']);
				}

				if (file_exists($phpbb_root_path . 'language/' . $row['lang_iso'] . '/search_synonyms.' . $phpEx))
				{
					$this->add_to_archive($compress, array("search_synonyms.$phpEx"), $row['lang_iso']);
				}

				// Write files in folders
				$this->add_to_archive($compress, $email_templates, $row['lang_iso'], 'email');
				$this->add_to_archive($compress, $acp_files, $row['lang_iso'], 'acp');
				$this->add_to_archive($compress, $mod_files, $row['lang_iso'], 'mods');

				// Write ISO File
				$iso_src = htmlspecialchars_decode($row['lang_english_name']) . "\n";
				$iso_src .= htmlspecialchars_decode($row['lang_local_name']) . "\n";
				$iso_src .= htmlspecialchars_decode($row['lang_author']);
				$compress->add_data($iso_src, 'language/' . $row['lang_iso'] . '/iso.txt');

				// index.html files
				$compress->add_data('', 'language/' . $row['lang_iso'] . '/index.html');
				$compress->add_data('', 'language/' . $row['lang_iso'] . '/email/index.html');
				$compress->add_data('', 'language/' . $row['lang_iso'] . '/acp/index.html');
				
				if (sizeof($mod_files))
				{
					$compress->add_data('', 'language/' . $row['lang_iso'] . '/mods/index.html');
				}

				$compress->close();

				$compress->download('lang_' . $row['lang_iso']);
				@unlink($phpbb_root_path . 'store/lang_' . $row['lang_iso'] . $use_method);

				exit;

			break;
		}

		$sql = 'SELECT user_lang, COUNT(user_lang) AS lang_count
			FROM ' . USERS_TABLE . ' 
			GROUP BY user_lang';
		$result = $db->sql_query($sql);

		$lang_count = array();
		while ($row = $db->sql_fetchrow($result))
		{
			$lang_count[$row['user_lang']] = $row['lang_count'];
		}
		$db->sql_freeresult($result);

		$sql = 'SELECT * 
			FROM ' . LANG_TABLE . '
			ORDER BY lang_english_name';
		$result = $db->sql_query($sql);

		$installed = array();

		while ($row = $db->sql_fetchrow($result))
		{
			$installed[] = $row['lang_iso'];
			$tagstyle = ($row['lang_iso'] == $config['default_lang']) ? '*' : '';

			$template->assign_block_vars('lang', array(
				'U_DETAILS'			=> $this->u_action . "&action=details&id={$row['lang_id']}",
				'U_DOWNLOAD'		=> $this->u_action . "&action=download&id={$row['lang_id']}",
				'U_DELETE'			=> $this->u_action . "&action=delete&id={$row['lang_id']}",

				'ENGLISH_NAME'		=> $row['lang_english_name'],
				'TAG'				=> $tagstyle,
				'LOCAL_NAME'		=> $row['lang_local_name'],
				'ISO'				=> $row['lang_iso'],
				'USED_BY'			=> (isset($lang_count[$row['lang_iso']])) ? $lang_count[$row['lang_iso']] : 0,
			));
		}
		$db->sql_freeresult($result);

		$new_ary = $iso = array();
		$dp = @opendir("{$phpbb_root_path}language");

		if ($dp)
		{
			while (($file = readdir($dp)) !== false)
			{
				if ($file[0] != '.' && file_exists("{$phpbb_root_path}language/$file/iso.txt"))
				{
					if (!in_array($file, $installed))
					{
						if ($iso = file("{$phpbb_root_path}language/$file/iso.txt"))
						{
							if (sizeof($iso) == 3)
							{
								$new_ary[$file] = array(
									'iso'		=> $file,
									'name'		=> trim($iso[0]),
									'local_name'=> trim($iso[1]),
									'author'	=> trim($iso[2])
								);
							}
						}
					}
				}
			}
			closedir($dp);
		}

		unset($installed);

		if (sizeof($new_ary))
		{
			foreach ($new_ary as $iso => $lang_ary)
			{
				$template->assign_block_vars('notinst', array(
					'ISO'			=> htmlspecialchars($lang_ary['iso']),
					'LOCAL_NAME'	=> htmlspecialchars($lang_ary['local_name'], ENT_COMPAT, 'UTF-8'),
					'NAME'			=> htmlspecialchars($lang_ary['name'], ENT_COMPAT, 'UTF-8'),
					'U_INSTALL'		=> $this->u_action . '&action=install&iso=' . urlencode($lang_ary['iso']))
				);
			}
		}

		unset($new_ary);
	}


	/**
	* Set default language variables/header
	*/
	function default_variables()
	{
		global $phpEx;

		$this->language_file_header = '<?php
/** 
*
* {FILENAME} [{LANG_NAME}]
*
* @package language
* @copyright (c) ' . date('Y') . ' phpBB Group 
* @author {CHANGED} - {AUTHOR}
* @license http://opensource.org/licenses/gpl-license.php GNU Public License 
*
*/

/**
* DO NOT CHANGE
*/
if (empty($lang) || !is_array($lang))
{
	$lang = array();
}

// DEVELOPERS PLEASE NOTE
//
// All language files should use UTF-8 as their encoding and the files must not contain a BOM.
//
// Placeholders can now contain order information, e.g. instead of
// \'Page %s of %s\' you can (and should) write \'Page %1$s of %2$s\', this allows
// translators to re-order the output of data while ensuring it remains correct
//
// You do not need this where single placeholders are used, e.g. \'Message %d\' is fine
// equally where a string contains only two placeholders which are used to wrap text
// in a url you again do not need to specify an order e.g., \'Click %sHERE%s\' is fine
';

		$this->lang_header = '
$lang = array_merge($lang, array(
';

		// Language files in language root directory
		$this->main_files = array("common.$phpEx", "groups.$phpEx", "install.$phpEx", "mcp.$phpEx", "memberlist.$phpEx", "posting.$phpEx", "search.$phpEx", "ucp.$phpEx", "viewforum.$phpEx", "viewtopic.$phpEx", "help_bbcode.$phpEx", "help_faq.$phpEx");
	}

	/**
	* Get filename/location of language file
	*/
	function get_filename($lang_iso, $directory, $filename, $check_store = false, $only_return_filename = false)
	{
		global $phpbb_root_path, $safe_mode;
		
		$check_filename = "language/$lang_iso/" . (($directory) ? $directory . '/' : '') . $filename;

		if ($check_store)
		{
			$check_store_filename = ($safe_mode) ? "store/langfile_{$lang_iso}" . (($directory) ? '_' . $directory : '') . "_{$filename}" : "store/language/$lang_iso/" . (($directory) ? $directory . '/' : '') . $filename;

			if (!$only_return_filename && file_exists($phpbb_root_path . $check_store_filename))
			{
				return $check_store_filename;
			}
			else if ($only_return_filename)
			{
				return $check_store_filename;
			}
		}

		return $check_filename;
	}

	/**
	* Add files to archive
	*/
	function add_to_archive(&$compress, $filelist, $lang_iso, $directory = '')
	{
		global $phpbb_root_path;

		foreach ($filelist as $file)
		{
			// Get source filename
			$source = $this->get_filename($lang_iso, $directory, $file, true);
			$destination = 'language/' . $lang_iso . '/' . (($directory) ? $directory . '/' : '') . $file;

			// Add file to archive
			$compress->add_custom_file($phpbb_root_path . $source, $destination);
		}
	}

	/**
	* Little helper to add some hardcoded template bits
	*/
	function add_input_field()
	{
		$keys = func_get_args();

		$non_static		= array_shift($keys);
		$value			= array_shift($keys);

		if (!$non_static)
		{
			return '<strong>' . htmlspecialchars($value, ENT_COMPAT, 'UTF-8') . '</strong>';
		}

		// If more then 270 characters, then we present a textarea, else an input field
		$textarea = (utf8_strlen($value) > 270) ? true : false;
		$tpl = '';

		$tpl .= ($textarea) ? '<textarea name="' : '<input type="text" name="';
		$tpl .= 'entry[' . implode('][', array_map('utf8_htmlspecialchars', $keys)) . ']"';

		$tpl .= ($textarea) ? ' cols="80" rows="5" class="langvalue">' : ' class="langvalue" value="';
		$tpl .= htmlspecialchars($value, ENT_COMPAT, 'UTF-8');
		$tpl .= ($textarea) ? '</textarea>' : '" />';

		return $tpl;
	}

	/**
	* Print language entries
	*/
	function print_language_entries(&$lang_ary, $key_prefix = '', $input_field = true)
	{
		$tpl = '';

		foreach ($lang_ary as $key => $value)
		{
			if (is_array($value))
			{
				// Write key
				$tpl .= '
				<tr>
					<td class="row3" colspan="2">' . htmlspecialchars($key_prefix, ENT_COMPAT, 'UTF-8') . '<strong>' . htmlspecialchars($key, ENT_COMPAT, 'UTF-8') . '</strong></td>
				</tr>';

				foreach ($value as $_key => $_value)
				{
					if (is_array($_value))
					{
						// Write key
						$tpl .= '
							<tr>
								<td class="row3" colspan="2">' . htmlspecialchars($key_prefix, ENT_COMPAT, 'UTF-8') . '&nbsp; &nbsp;<strong>' . htmlspecialchars($_key, ENT_COMPAT, 'UTF-8') . '</strong></td>
							</tr>';

						foreach ($_value as $__key => $__value)
						{
							// Write key
							$tpl .= '
								<tr>
									<td class="row1" style="white-space: nowrap;">' . htmlspecialchars($key_prefix, ENT_COMPAT, 'UTF-8') . '<strong>' . htmlspecialchars($__key, ENT_COMPAT, 'UTF-8') . '</strong></td>
									<td class="row2">';

							$tpl .= $this->add_input_field($input_field, $__value, $key, $_key, $__key);

							$tpl .= '</td>
								</tr>';
						}
					}
					else
					{
						// Write key
						$tpl .= '
							<tr>
								<td class="row1" style="white-space: nowrap;">' . htmlspecialchars($key_prefix, ENT_COMPAT, 'UTF-8') . '<strong>' . htmlspecialchars($_key, ENT_COMPAT, 'UTF-8') . '</strong></td>
								<td class="row2">';

						$tpl .= $this->add_input_field($input_field, $_value, $key, $_key);

						$tpl .= '</td>
							</tr>';
					}
				}

				$tpl .= '
				<tr>
					<td class="spacer" colspan="2">&nbsp;</td>
				</tr>';
			}
			else
			{
				// Write key
				$tpl .= '
				<tr>
					<td class="row1" style="white-space: nowrap;">' . htmlspecialchars($key_prefix, ENT_COMPAT, 'UTF-8') . '<strong>' . htmlspecialchars($key, ENT_COMPAT, 'UTF-8') . '</strong></td>
					<td class="row2">';

				$tpl .= $this->add_input_field($input_field, $value, $key);

				$tpl .= '</td>
					</tr>';
			}
		}

		return $tpl;
	}

	/**
	* Compare two language files
	*/
	function compare_language_files($source_lang, $dest_lang, $directory, $file)
	{
		global $phpbb_root_path, $phpEx;

		$return_ary = array();

		$lang = array();
		include("{$phpbb_root_path}language/{$source_lang}/" . (($directory) ? $directory . '/' : '') . $file);
		$lang_entry_src = $lang;

		$lang = array();

		if (!file_exists($phpbb_root_path . $this->get_filename($dest_lang, $directory, $file, true)))
		{
			return array();
		}

		include($phpbb_root_path . $this->get_filename($dest_lang, $directory, $file, true));

		$lang_entry_dst = $lang;

		unset($lang);

		$diff_array_keys = array_diff(array_keys($lang_entry_src), array_keys($lang_entry_dst));
		unset($lang_entry_dst);

		foreach ($diff_array_keys as $key)
		{
			$return_ary[$key] = $lang_entry_src[$key];
		}

		unset($lang_entry_src);

		return $return_ary;
	}

	/**
	* Return language string value for storage
	*/
	function prepare_lang_entry($text, $store = true)
	{
		$text = (STRIP) ? stripslashes($text) : $text;

		// Adjust for storage...
		if ($store)
		{
			$text = str_replace("'", "\\'", str_replace('\\', '\\\\', $text));
		}

		return $text;
	}

	/**
	* Format language array for storage
	*/
	function format_lang_array($key, $value, $tabs = "\t")
	{
		$entry = '';

		if (!is_array($value))
		{
			$entry .= "{$tabs}'{$key}'\t=> '" . $this->prepare_lang_entry($value) . "',\n";
		}
		else
		{
			$_tabs = $tabs . "\t";
			$entry .= "\n{$tabs}'{$key}'\t=> array(\n";

			foreach ($value as $_key => $_value)
			{
				$entry .= $this->format_lang_array($_key, $_value, $_tabs);
			}

			$entry .= "{$tabs}),\n\n";
		}

		return $entry;
	}
}

?>