<?php
/**
 * eGgroupWare admin - UI for adding custom fields
 *
 * @link http://www.egroupware.org
 * @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
 * @author Cornelius Weiss <nelius-AT-von-und-zu-weiss.de>
 * @package admin
 * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
 * @version $Id$
 */

/**
* Custiomfields class -  manages customfield definitions in egw_config table
*
* The repository name (config_name) is 'customfields'.
*/
class customfields
{

	/**
	* appname of app which want to add / edit its customfields
	*
	* @var string
	*/
	var $appname;

	/**
	* userdefiened types e.g. type of infolog
	*
	* @var array
	*/
	var $types2 = array();
	var $content_types,$fields;

	var $public_functions = array(
		'edit' => True
	);
	/**
	 * Instance of etemplate class
	 *
	 * @var etemplate
	 */
	var $tmpl;

	/**
	 * Constructor
	 *
	 * @param string $appname
	 */
	function __construct($appname='')
	{
		if (($this->appname = $appname))
		{
			$this->fields = config::get_customfields($this->appname,true);
			$this->content_types = config::get_content_types($this->appname);
		}
	}

	/**
	 * Edit/Create Custom fields with type
	 *
	 * @author Ralf Becker <ralfbecker-AT-outdoor-training.de>
	 * @param array $content Content from the eTemplate Exec
	 */
	function edit($content = null)
	{
		$GLOBALS['egw']->translation->add_app('infolog');       // til we move the translations

		// determine appname
		$this->appname = $_GET['appname'] ? $_GET['appname'] : ($content['appname'] ? $content['appname'] : false);
		if(!$this->appname) die(lang('Error! No appname found'));

		$GLOBALS['egw']->translation->add_app('infolog');	// til we move the translations
		$this->tmpl = new etemplate();
		// do we manage content-types?
		if($this->tmpl->read($this->appname.'.admin.types')) $this->manage_content_types = true;

		$this->fields = config::get_customfields($this->appname,true);
		$this->tmpl->read('admin.customfields');

		if($this->manage_content_types)
		{
			$this->content_types = config::get_content_types($this->appname);
			if (count($this->content_types)==0)
			{
				// if you define your default types of your app with the search_link hook, they are available here, if no types were found
				$this->content_types = (array)egw_link::get_registry($this->appname,'default_types');
				//error_log( array2string($this->content_types));
			}
		}
		else
		{
			$this->tmpl->children[0]['data'][2]['A']['disabled'] = true;
			$this->tmpl->children[0]['data'][3]['A']['disabled'] = true;
		}
		if (is_array($content))
		{
			//echo '<pre style="text-align: left;">'; print_r($content); echo "</pre>\n";
			if($this->manage_content_types)
			{
				$this->content_type = $content['content_types']['types'];
			}

			if($content['content_types']['delete']) $this->delete_content_type($content);
			elseif($content['content_types']['create']) $this->create_content_type($content);
			elseif($content['fields']['delete']) $this->delete_field($content);
			elseif($content['fields']['create']) $this->create_field($content);
			else
			{
				list($action) = @each($content['button']);
				switch($action)
				{
					default:
						if (!$content['fields']['create'] && !$content['fields']['delete'])
						{
							break;	// type change
						}
					case 'save':
					case 'apply':
						$this->update($content);
						if ($action != 'save')
						{
							break;
						}
					case 'cancel':
						$GLOBALS['egw']->redirect_link($content['referer'] ? $content['referer'] : '/admin/index.php');
						exit;
				}
			}
			$referer = $content['referer'];
		}
		else
		{
			if($this->manage_content_types)
			{
				$content_types = array_keys($this->content_types);
				$this->content_type = $content_types[0];
			}
			$content['use_private'] = (boolean)$_GET['use_private'];

			$referer = $GLOBALS['egw']->common->get_referer();
		}
		$GLOBALS['egw_info']['flags']['app_header'] = $GLOBALS['egw_info']['apps'][$this->appname]['title'].' - '.lang('Custom fields');
		$readonlys = array();

		if($this->manage_content_types)
		{
			$content['content_types']['app-name'] = $this->appname;
			foreach($this->content_types as $type => $entry)
			{
				$this->types2[$type] = $entry['name'];
			}
			$content['content_types']['options-types'] = $this->types2;
			$this->tmpl->children[0]['data'][3]['A']['name'] = $this->appname.'.admin.types';
			$this->tmpl->children[0]['data'][3]['A']['size'] = 'content_type_options';
			$content['content_type_options'] = $this->content_types[$this->content_type]['options'];
			$content['content_type_options']['type'] = $this->content_types[$this->content_type]['name'];
			if ($this->content_types[$this->content_type]['non_deletable'])
			{
				$content['content_types']['non_deletable'] = true;
			}
		}
		//echo 'customfields=<pre style="text-align: left;">'; print_r($this->fields); echo "</pre>\n";
		$content['fields'] = array('use_private' => $content['use_private']);
		$n = 0;
		foreach($this->fields as $name => $data)
		{
			if(!is_array($data))
			{
				$data = array();
				$data['label'] = $name;
				$data['order'] = ($n+1) * 10;
			}
			if (is_array($data['values']))
			{
				$values = '';
				foreach($data['values'] as $var => $value)
				{
					$values .= (!empty($values) ? "\n" : '').$var.'='.$value;
				}
				$data['values'] = $values;
			}
			$content['fields'][++$n] = (array)$data + array(
				'name'   => $name
			);
			$preserv_fields[$n]['old_name'] = $name;
			$readonlys['fields']["create$name"] = True;
		}
		$content['fields'][++$n] = array('name'=>'','order' => 10 * $n);	// new line for create
		if($this->manage_content_types) $content['fields']['type2'] = 'enable';

		$readonlys['fields']["delete[]"] = True;
		//echo '<p>uicustomfields.edit(content = <pre style="text-align: left;">'; print_r($content); echo "</pre>\n";
		//echo 'readonlys = <pre style="text-align: left;">'; print_r($readonlys); echo "</pre>\n";
		$sel_options = array(
			'type2' => $this->types2 + array('tmpl' => 'template'),
		);
		// do NOT allow to delete original contact content-type for addressbook,
		// as it only creates support problems as users incidently delete it
		if ($this->appname == 'addressbook' && $this->content_type == 'n')
		{
			$readonlys['content_types']['delete'] = true;
		}
		$this->tmpl->exec('admin.customfields.edit',$content,$sel_options,$readonlys,array(
			'fields' => $preserv_fields,
			'appname' => $this->appname,
			'referer' => $referer,
			'use_private' => $content['use_private'],
		));
	}

	function update_fields(&$content)
	{
		foreach($content['fields'] as $field)
		{
			$name = trim($field['name']);
			$old_name = $field['old_name'];

			if (!empty($delete) && $delete == $old_name)
			{
				unset($this->fields[$old_name]);
				continue;
			}
			if (isset($field['old_name']))
			{
				if (empty($name))	// empty name not allowed
				{
					$content['error_msg'] = lang('Name must not be empty !!!');
					$name = $old_name;
				}
				if (!empty($name) && $old_name != $name)	// renamed
				{
					unset($this->fields[$old_name]);
				}
			}
			elseif (empty($name))		// new item and empty ==> ignore it
			{
				continue;
			}
			$values = array();
			if (!empty($field['values']))
			{
				foreach(explode("\n",$field['values']) as $line)
				{
					list($var,$value) = explode('=',trim($line),2);
					$var = trim($var);
					$values[$var] = empty($value) ? $var : $value;
				}
			}
			$this->fields[$name] = array(
				'type'  => $field['type'],
				'type2'	=> $field['type2'],
				'label' => empty($field['label']) ? $name : $field['label'],
				'help'  => $field['help'],
				'values'=> $values,
				'len'   => $field['len'],
				'rows'  => (int)$field['rows'],
				'order' => (int)$field['order'],
				'private' => $field['private'],
			);
			if(!$this->fields[$name]['type2'] && $this->manage_content_types)
			{
				$this->fields[$name]['type2'] = (string)0;
			}
		}
		if (!function_exists('sort_by_order'))
		{
			function sort_by_order($arr1,$arr2)
			{
				return $arr1['order'] - $arr2['order'];
			}
		}
		uasort($this->fields,sort_by_order);

		$n = 0;
		foreach($this->fields as $name => $data)
		{
			$this->fields[$name]['order'] = ($n += 10);
		}
	}


	function update(&$content)
	{
		$this->update_fields($content);
		$this->content_types[$this->content_type]['options'] = $content['content_type_options'];
		// save changes to repository
		$this->save_repository();
	}

	/**
	* deletes custom field from customfield definitions
	*/
	function delete_field(&$content)
	{
		unset($this->fields[key($content['fields']['delete'])]);
		// save changes to repository
		$this->save_repository();
	}

	function delete_content_type(&$content)
	{
		unset($this->content_types[$content['content_types']['types']]);
		// save changes to repository
		$this->save_repository();
	}

	/**
	* create a new custom field
	*/
	function create_field(&$content)
	{
		$new_name = trim($content['fields'][count($content['fields'])-1]['name']);
		if (empty($new_name) || isset($this->fields[$new_name]))
		{
			$content['error_msg'] .= empty($new_name) ?
				lang('You have to enter a name, to create a new field!!!') :
				lang("Field '%1' already exists !!!",$new_name);
		}
		else
		{
			$this->fields[$new_name] = $content['fields'][count($content['fields'])-1];
			if(!$this->fields[$new_name]['label']) $this->fields[$new_name]['label'] = $this->fields[$new_name]['name'];
			$this->save_repository();
		}
	}

	function create_content_type(&$content)
	{
		$new_name = trim($content['content_types']['name']);
		if (empty($new_name) || isset($this->fields[$new_name]))
		{
			$content['error_msg'] .= empty($new_name) ?
				lang('You have to enter a name, to create a new type!!!') :
				lang("type '%1' already exists !!!",$new_name);
		}
		else
		{
			// search free type character
			for($i=97;$i<=122;$i++)
			{
				if (!$this->content_types[chr($i)] &&
					// skip letter of deleted type for addressbook content-types, as it gives SQL error
					// content-type are lowercase, addressbook_so::DELETED_TYPE === 'D', but DB is case-insensitive
					($this->appname !== 'addressbook' || chr($i) !== strtolower(addressbook_so::DELETED_TYPE)))
				{
					$new_type = chr($i);
					break;
				}
			}
			$this->content_types[$new_type] = array('name' => $new_name);
			$this->save_repository();
		}
	}

	/**
	* save changes to repository
	*/
	function save_repository()
	{
		//echo '<p>uicustomfields::save_repository() \$this->fields=<pre style="text-aling: left;">'; print_r($this->fields); echo "</pre>\n";
		$config = new config($this->appname);
		$config->read_repository();
		$config->value('customfields',$this->fields);
		$config->value('types',$this->content_types);
		$config->save_repository();
	}

	/**
	* get customfields of using application
	*
	* @deprecated use config::get_customfields() direct, no need to instanciate this UI class
	* @author Cornelius Weiss
	* @param boolean $all_private_too=false should all the private fields be returned too
	* @return array with customfields
	*/
	function get_customfields($all_private_too=false)
	{
		return config::get_customfields($this->appname,$all_private_too);
	}

	/**
	* get_content_types of using application
	*
	* @deprecated use config::get_content_types() direct, no need to instanciate this UI class
	* @author Cornelius Weiss
	* @return array with content-types
	*/
	function get_content_types()
	{
		return config::get_content_types($this->appname);
	}

}