<?php
/**
 * EGgroupware admin - New et2 site configuration
 *
 * @link http://www.egroupware.org
 * @author Ralf Becker <rb@stylite.de>
 * @package admin
 * @copyright (c) 2016-18 by Ralf Becker <rb@stylite.de>
 * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
 */

use EGroupware\Api;

/**
 * New site configuration for all apps using eTemplate2 $app/templates/default/config.xet
 */
class admin_config
{
	var $public_functions = array('index' => True);

	/**
	 * Upload function to store anonymous images into instance files_dir/anon_images
	 *
	 * @param array $file file info array
	 * @param array|string $value current value of login_background_file
	 *
	 */
	function ajax_upload_anon_images ($file, $value)
	{
		if (!isset($GLOBALS['egw_info']['user']['apps']['admin'])) die('no rights to be here!');
		$path = $GLOBALS['egw_info']['server']['files_dir'].'/anon-images';
		$success = false;
		$response = Api\Json\Response::get();
		if (is_array($file) && is_writable(dirname($path)) &&
			(is_dir($path) || mkdir($path)))
		{
			$tmp_file = array_keys($file);
			$destination = $path.'/'.$file[$tmp_file[0]]['name'];
			$success = rename($GLOBALS['egw_info']['server']['temp_dir'].'/'.$tmp_file[0],$destination);
		}
		if ($success)
		{
			$value = array_merge($value, array(
				$GLOBALS['egw_info']['server']['webserver_url'].'/api/anon_images.php?src='.urlencode($file[$tmp_file[0]]['name']).'&'.filemtime($destination),
			));
			$response->data($value);
		}
		else
		{
			$response->error(lang('Failed to upload %1',$destination));
		}
	}

	/**
	 * Removes images from anon-images directory
	 *
	 * @param type $files
	 */
	function remove_anon_images ($files)
	{
		if (!isset($GLOBALS['egw_info']['user']['apps']['admin'])) die('no rights to be here!');
		if ($files)
		{
			$base = $GLOBALS['egw_info']['server']['files_dir'].'/anon-images';
			foreach ($files as $file)
			{
				$parts2 = explode('anon_images.php?src=', $file);
				$parts = explode('&', $parts2[1]);
				$path = $base.'/'.urldecode($parts[0]);
				if (is_writable(dirname($base)) && file_exists($path))
				{
					unlink($path);
				}
			}
		}
	}

	/**
	 * List of configs
	 *
	 * @param type $_content
	 * @throws Api\Exception\WrongParameter
	 */
	function index($_content=null)
	{
		if (is_array($_content))
		{
			$_appname = $_content['appname'];
		}
		elseif (!empty($_GET['appname']) && isset($GLOBALS['egw_info']['apps'][$_GET['appname']]))
		{
			$_appname = $_GET['appname'];
		}
		else
		{
			throw new Api\Exception\WrongParameter("Wrong or missing appname parameter!");
		}
		if ($GLOBALS['egw']->acl->check('site_config_acce',1,'admin'))
		{
			Api\Framework::redirect_link('/index.php');
		}

		if (!empty($_GET['msg']))
		{
			Api\Framework::message($_GET['msg'], 'info');
		}

		// load the translations of the app we show too, so they dont need to be in admin!
		if ($_appname != 'admin')
		{
			Api\Translation::add_app($_appname);
		}

		switch($_appname)
		{
			case 'admin':
			case 'addressbook':
			case 'calendar':
			case 'preferences':
				$appname = $_appname;
				$config_appname = 'phpgwapi';
				break;
			case 'phpgwapi':
			case '':
				/* This keeps the admin from getting into what is a setup-only config */
				Api\Framework::redirect_link('/admin/index.php?ajax=true');
				break;
			default:
				$appname = $_appname;
				$config_appname = $appname;
				break;
		}

		$c = new Api\Config($config_appname);
		$old = (array)$c->read_repository();
		if ($_content['cancel'] || ($_content['save'] || $_content['apply']) && $GLOBALS['egw']->acl->check('site_config_acce',2,'admin'))
		{
			Api\Framework::redirect_link('/index.php', array(
				'menuaction' => 'admin.admin_ui.index',
				'ajax'       => 'true'
			),                           'admin');
		}

		if ($_content['save'] || $_content['apply'])
		{
			// support old validation hooks
			$_POST = array('newsettings' => &$_content['newsettings']);

			// Remove actual files (cleanup) of deselected urls from login_background_file
			if ($config_appname === 'phpgwapi' && !empty($c->config_data['login_background_file']))
			{
				$this->remove_anon_images(array_diff((array)$c->config_data['login_background_file'], (array)$_content['newsettings']['login_background_file']));
			}

			// "config_validate" hook returns a non-empty string with an error-message (everything else is treated as no error)
			// The hook can additional set $GLOBALS['egw_info']['server']['found_validation_hook'] with individual validation-functions:
			// a) regular function names matching the config-name or "final_validation" as values or
			// b) same key as config-value for a callable eg. $GLOBALS['egw_info']['server']['found_validation_hook'][<name>]='<class-name>::<name>'
			// The validation-function can return a non-empty string with an error (or deprecated set $GLOBALS['config_error']).
			// Function signature: ?string function(mixed $value, Api\Config $c) ($c can be used to modify the value to save: $c->config_data[$name]=$val)
			// Please note: only b) can be implemented in the file of a namespaced class
			$errors = Api\Hooks::single(array(
				'location' => 'config_validate',
			)+(array)$_content['newsettings'], $appname);
			if (!is_string($errors)) $errors = '';	// old hooks allways return true

			foreach($_content['newsettings'] as $key => $config)
			{
				if ($config)
				{
					$c->config_data[$key] = $config;
					if (in_array($key, (array)$GLOBALS['egw_info']['server']['found_validation_hook'], true) &&
							function_exists($func=$key) ||
						isset($GLOBALS['egw_info']['server']['found_validation_hook'][$key]) &&
							is_callable($func=$GLOBALS['egw_info']['server']['found_validation_hook'][$key]))
					{
						if (is_string($err=$func($config, $c)) || ($err=$GLOBALS['config_error']))
						{
							$errors .= lang($err) . "\n";
							$GLOBALS['config_error'] = False;
						}
					}
				}
				// don't erase passwords, since we also don't print them
				elseif(strpos($key,'passwd') === false && strpos($key,'password') === false && strpos($key,'root_pw') === false)
				{
					unset($c->config_data[$key]);
				}
			}
			if (in_array('final_validation', (array)$GLOBALS['egw_info']['server']['found_validation_hook']) &&
					function_exists($func='final_validation') ||
				isset($GLOBALS['egw_info']['server']['found_validation_hook']['final_validation']) &&
					is_callable($func=$GLOBALS['egw_info']['server']['found_validation_hook']['final_validation']))
			{
				if (is_string($err=$func($_content['newsettings'], $c)) || ($err=$GLOBALS['config_error']))
				{
					$errors .= lang($err) . "\n";
					$GLOBALS['config_error'] = False;
				}
			}
			unset($GLOBALS['egw_info']['server']['found_validation_hook']);

			// do not allow to save config, if there are errors
			if (!$errors)
			{
				// compute real changes and their old values (null for removals)
				$modifications = array_udiff_assoc($c->config_data, $old, function($a, $b)
				{
					return (int)($a != $b);	// necessary to kope with arrays
				});
				$removals = array_diff(array_udiff_assoc($old, $c->config_data, function($a, $b)
				{
					return (int)(!empty($a) && $a != $b);
				}), array(null, ''));
				$set = array_merge(array_fill_keys(array_keys($removals), null), $modifications);
				$old = array_filter($old, function($key) use ($set)
				{
					return array_key_exists($key, $set);
				}, ARRAY_FILTER_USE_KEY);
				if ($set)
				{
					$cmd = new admin_cmd_config($_appname, $set, $old,
						(array)$_content['admin_cmd'], $config_appname === 'phpgwapi');
					$msg = $cmd->run();
				}
				else
				{
					$msg = lang('Nothing to save.');
				}
				// allow apps to hook into configuration dialog to eg. save some stuff outside configuration
				$_content['location'] = 'config_after_save';
				Api\Hooks::single($_content, $_appname);
			}
			if(!$errors && !$_content['apply'])
			{
				Api\Framework::message($msg, 'success');
				Api\Framework::redirect_link('/index.php', array(
					'menuaction' => 'admin.admin_ui.index',
					'ajax' => 'true'
				), 'admin');
			}
		}

		if($errors)
		{
			Api\Framework::message(lang('Error') . ': ' . $errors, 'error');
			unset($errors);
			unset($GLOBALS['config_error']);

			// keep old content on error
			$config = $_content['newsettings'];
		}
		else
		{
			if ($_content['apply'])
			{
				Api\Framework::message($msg, 'success');
			}
			$config = $c->read_repository();
		}
		$sel_options = $readonlys = array();
		// call "config" hook, allowing apps to overwrite config, eg. set default values,
		// or return options in "sel_options" keys
		$config['location'] = 'config';
		// let config hook know, this is an inital call and not one after user hits [Apply] button
		$config['initial-call'] = is_null($_content);
		$ret = Api\Hooks::single($config, $appname);
		if (is_array($ret))
		{
			if (isset($ret['sel_options'])) $sel_options = $ret['sel_options'];
			$config = array_merge($config, $ret);
		}

		$tmpl = new Api\Etemplate($appname.'.config');
		$path = (parse_url($tmpl->rel_path, PHP_URL_SCHEME) !== 'vfs' ? EGW_SERVER_ROOT : '').$tmpl->rel_path;
		$content = array(
			'tabs' => $_content['tabs'] ?: $_GET['tab'] ?? '',
			'tabs2' => $_content['tabs2'] ?: $_GET['tab'] ?? '',
			'template' => $appname.'.config',
			'newsettings' => array(),
			'need_tab' => strpos(file_get_contents(EGW_SERVER_ROOT.'/'.$appname.'/templates/default/config.xet'), '<tabpanels>') === false,
		);

		// $app.config is looping eg. <select onchange="1"
		if (!empty($_content['newsettings']) && empty($_content['save']) && empty($_content['apply']))
		{
			$content['newsettings'] = $_content['newsettings'];
		}
		else
		{
			// for security reasons we do not send all config to client-side, but only ones mentioned in templates
			$matches = null;
			preg_match_all('/(id|content)="newsettings\[([^]]+)\]/', file_get_contents($path), $matches, PREG_PATTERN_ORDER);
			foreach($matches[2] as $name)
			{
				$content['newsettings'][$name] = isset($config[$name]) ? $config[$name] : '';
			}
		}

		// make everything readonly and remove save/apply button, if user has not rights to store config
		if ($GLOBALS['egw']->acl->check('site_config_acce',2,'admin'))
		{
			$readonlys['__ALL__'] = true;
			$readonlys['cancel'] = false;
		}

		$tmpl->read('admin.site-config');
		$method = (get_called_class() == __CLASS__) ? 'admin.admin_config.index' : "$appname.".get_called_class().'.'.__FUNCTION__;
		$tmpl->exec($method, $content, $sel_options, $readonlys, array('appname' => $appname));
	}
}