<?php
declare(strict_types=1);

/*
 * 	Identity switch RoundCube Bundle
 *
 *	@copyright	(c) 2024 Forian Daeumling, Germany. All right reserved
 * 	@license 	https://github.com/toteph42/identity_switch/blob/master/LICENSE
 */

class identity_switch_prefs extends rcube_plugin
{
	public $task = '?(?!login|logout).*';

	private $default = 0;							// default identity

	const TABLE = 'identity_switch';					// where to store in $_SESSION
	const USR 	= -1; 								// dummy user

	// user flags in database
	const ENABLED		    	= 0x0001;			// identity enabled
	const IMAP_SSL				= 0x0004;			// IMAP SSL emabled
	const IMAP_TLS				= 0x0008;			// IMAP TLS enabled
	const SMTP_SSL				= 0x0010;			// SMTP SLL enabled
	const SMTP_TLS				= 0x0020;			// SMTP TLS enabled
	const NOTIFY_BASIC			= 0x0100;			// use basic notification
	const NOTIFY_DESKTOP		= 0x0200;			// use desktop notification
	const NOTIFY_SOUND			= 0x0400;			// use sound notification
	const CHECK_ALLFOLDER		= 0x0800;			// check all folders for unseen mails
	const SHOW_REAL_FOLDER		= 0x1000;			// show real folder names
	const LOCK_SPECIAL_FOLDER	= 0x2000;			// lock special folders
	const UNSEEN				= 0x4000;			// unssen check performed
	const DEFAULT				= 0x8000;			// default identity

	/* 	20240629.sql

		0x14 20 - IMAP_SSL | SAME_AS_IMAP 	-> 0x24 20 IMAP_SSL | SMTP_SSL
		0x18 24 - IMAP_TLS | SAME_AS_IMAP	-> 0x28 40 IMAP_TLS | SMTP_TLS
		0x10 16 - NONE 	   | SAME_AS_IMAP	-> 0x00 NONE        | NONE
		0x04 04 - IMAP_SSL | NONE			-> 0x04 04 IMAP_SSL | NONE
		0x08 08 - IMAP_TSL | NONE 			-> 0x08 08 IMAP_TLS | NONE
	*/

	/**
	 * 	Initialize Plugin
	 *
	 * 	{@inheritDoc}
	 * 	@see rcube_plugin::init()
	 */
	function init(): void
	{
		// preference hooks and actions
		$this->add_hook('identity_form', 				  [ $this, 'show_identity_switch_prefs' ]);
		$this->add_hook('identity_update', 				  [ $this, 'update_identity_switch_prefs' ]);
		$this->add_hook('identity_create_after',		  [ $this, 'update_identity_switch_prefs' ]);
		$this->add_hook('identity_delete', 				  [ $this, 'delete_identity_switch_prefs' ]);
		$this->add_hook('preferences_list', 			  [ $this, 'show_default_identity_prefs' ]);
		$this->add_hook('preferences_save', 			  [ $this, 'save_default_identity_prefs' ]);
		$this->add_hook('identity_update', 			  	  [ $this, 'upd_default_identity_prefs' ]);

		// get default identity
		if (!$this->default)
		{
			$rc 		   = rcmail::get_instance();
			$this->default = $rc->user->get_identity();
			$this->default = $this->default['identity_id'];
		}
	}

	/**
	 * 	Show preference list in settings for default identity
	 *
	 * 	@param 	array $args
	 * 	@return array
	 */
	function show_default_identity_prefs(array $args): array
	{
		// handle onlysome preferences
		if ($args['section'] != 'folders' && $args['section'] != 'mailbox' && $args['section'] != 'general')
		    return $args;

		$this->add_texts('localization');

		// common settings
		if ($args['section'] == 'general')
			return self::show_general_prefs($args);

		// special folder settings
		if ($args['section'] == 'folders')
			return self::show_special_folders_prefs($args);

		// mailbox settings
		if ($args['section'] == 'mailbox')
			return self::show_notification_prefs($args);

		return $args;
	}

	/**
	 * 	Show general preferences
	 *
	 * 	@param array $args
	 * 	@param bool $flag
	 * 	@return array
	 */
	private function show_general_prefs(array $args, bool $int_call = false): array
	{
		if (!self::get('config', 'check'))
		{
			if (!$int_call)
				unset($args['blocks']['main']['options']['refresh_interval']);
			return $args;
		}

		$rc = rcmail::get_instance();

		// check if configuration can be override
		if (in_array('refresh_interval', (array) $rc->config->get('dont_override')))
			return $args;

		$cfg = $rc->config->all();

		$sel = new html_select([
					'name'  => '_refresh_interval',
                    'id'    => '_refresh_interval',
                    'class' => 'custom-select'
        ]);

		$sel->add($this->gettext('never'), 0);
        foreach ([ 1, 3, 5, 10, 15, 30, 60 ] as $min)
        {
        	if (!$cfg['min_refresh_interval'] || $cfg['min_refresh_interval'] <= $min * 60)
        	{
				$lab = $rc->gettext([ 'name' => 'everynminutes', 'vars' => ['n' => $min ] ]);
                $sel->add($lab, $min);
			}
		}

		$rec = self::get(isset($args['record']['identity_id']) ? $args['record']['identity_id'] : self::USR);

        if ($int_call)
	        return [ 'refreshinterval' => [
        									'type' => 'select',
									  		'value' => $sel->show($rec['newmail_check'] / 60),
										  ]
        	];

		$args['blocks']['main']['options']['refresh_interval'] = [
                        'title'   => html::label('_refresh_interval', rcube::Q($this->gettext('refreshinterval'))),
                        'content' => $sel->show($rec['newmail_check'] / 60),
		];

		return $args;
	}

	/**
	 * 	Show special folder preferences
	 *
	 * 	@param array $args
	 * 	@return array
	 */
	private function show_special_folders_prefs(array $args): array
	{
		$no_override = array_flip((array)rcmail::get_instance()->config->get('dont_override'));

		$rec = self::get(self::get('iid'));

		$fld = rcmail_action::folder_selector([ 'noselection' 	=> '---',
												'realnames' 	=> true,
												'maxlength' 	=> 30,
												'folder_filter' => 'mail',
												'folder_rights' => 'w' ]);

		// modify template
		$args['blocks']['main']['name'] .= ' [ '.rcube::Q($this->gettext('identity')).': '.$rec['label'].' ]';

	    $sel = new html_checkbox([ 'name' 	=> '_show_real_foldernames',
        						   'id' 	=> 'show_real_foldernames',
            					   'value' 	=> '1' ]);

	    $set = &$args['blocks']['main']['options'];
	    $set['show_real_foldernames']['content'] = $sel->show(($rec['flags'] & self::SHOW_REAL_FOLDER) ? '1' : '0');

		foreach ($rec['folders'] as $k => $v)
		{
			if (isset($no_override[$k.'_mbox']))
				continue;

			$set[$k.'_mbox']['content'] = $fld->show($v, [
					  							'id' 		=> '_'.$k.'_mbox',
										  		'name' 		=> '_'.$k. '_mbox',
												'onchange' 	=> "if ($(this).val() == 'INBOX') $(this).val('')",
					  						 ]);
		}

		return $args;
	}

	/**
	 * 	Show notification preferences
	 *
	 * 	@param array $args
	 * 	@param bool $flag
	 * 	@return array
	 */
	private function show_notification_prefs(array $args, bool $int_call = false): array
	{
		// checking disabled?
		if (!self::get('config', 'check'))
		{
			if (!$int_call)
				unset($args['blocks']['new_message']['options']['check_all_folders']);
			return $args;
		}

		// load identity data
		$rec = self::get(isset($args['record']['identity_id']) ? $args['record']['identity_id'] : self::get('iid'));

        $rc = rcmail::get_instance();

		if ($int_call)
		{
			$args['form']['notify'] = [];
			$set = &$args['form']['notify'];
		} else
			$set = $args['blocks']['new_message'];
		$set; // disable Eclipse warning

		$set['name'] = $this->gettext('idsw.notify.caption');

		// check if configuration is not disabled
		$no_override = (array) $rc->config->get('dont_override');

		if ($int_call)
		{
			$tit = 'label';
			$val = 'value';
			$set = [];
			if (!in_array('check_all_folders', $no_override))
			{
				$set['check_all_folders'] = [];
				$s 		 				  = &$set['check_all_folders'];
				$s[$tit] 				  = rcube::Q($this->gettext('idsw.notify.allfolder'));
				$cb 	 				  = new html_checkbox([ 'name' => '_check_all_folder', 'value' => '1' ]);
				$s[$val] 				  = $cb->show($rec ? ($rec['flags'] & self::CHECK_ALLFOLDER ? '1' : '0') : '0');
			}
		} else {
			$tit = 'title';
			$val = 'content';
			$set = &$args['blocks']['new_message']['options'];
			if (!in_array('check_all_folders', $no_override))
			{
		        $s 		 = &$set['check_all_folders'];
		        $s; 		// disable Eclipse warning
				$s[$tit] = rcube::Q($this->gettext('idsw.notify.allfolder'));
				$cb 	 = new html_checkbox([ 'name' => '_check_all_folder', 'value' => '1' ]);
				$s[$val] = $cb->show($rec ? ($rec['flags'] & self::CHECK_ALLFOLDER ? '1' : '0') : '0');
			}
		}

        $to = new html_select([ 'name' => "_notify_timeout" ]);
        foreach ([ 5, 10, 15, 30, 45, 60 ] as $sec)
            $to->add($this->gettext(['name' => 'afternseconds', 'vars' => [ 'n' => $sec ]]), $sec);

		foreach ([ 'basic' 	 => self::NOTIFY_BASIC,
				   'desktop' => self::NOTIFY_DESKTOP,
				   'sound' 	 => self::NOTIFY_SOUND ] as $type => $flag)
		{
			// setting disabled?
			if (in_array('newmail_notifier_'.$type, $no_override))
				continue;

			$cb = new html_checkbox([ 'name' => '_notify_'.$type,
								  	  			'value' => '1' ]);

			switch($type)
			{
			case 'basic':
				$set['notify_basic']   = [ $tit	=> $this->gettext('idsw.notify.basic'),
										   $val => $cb->show($rec['flags'] & $flag ? '1' : '0').
												   html::a([ 'href' => '#',
												   'onclick' => 'identity_switch_basic(); return false',
													  	'name' => '_notify_basic_test' ],
		                	       	 	   			   	$this->gettext('idsw.notify.test')) ];
				break;

			case 'desktop':
				$set['notify_desktop'] = [ $tit	=> $this->gettext('idsw.notify.desktop'),
										   $val	=> $cb->show($rec['flags'] & $flag ? '1' : '0').html::a(['href' => '#',
												   'onclick' => 'identity_switch_desktop(\''.
													   	rawurlencode($this->gettext('notify.title')).'\',\''.
													   	rawurlencode(sprintf($this->gettext('notify.msg'), 1, $rec['label'])).
													   	'\',\''.$rec['notify_timeout'].'\',\''.
													   	rawurlencode($this->gettext('notify.err.notification')).
													   	'\'); return false',
													   	'name' => '_notify_desktop_test' ],
														$this->gettext('idsw.notify.test')) ];
				$set['notify_timeout'] = [ $tit => $this->gettext('idsw.notify.timeout'),
										   $val	=> $to->show($rec['notify_timeout']) ];
				break;

			case 'sound':
				$set['notify.sound']   = [ $tit => $this->gettext('idsw.notify.sound'),
										   $val => $cb->show($rec['flags'] & $flag ? '1' : '0').html::a(['href' => '#',
												   'onclick' => 'identity_switch_sound(\''.
													   	rawurlencode($this->gettext('notify.err.autoplay')).
													   	'\'); return false',
													   	'name' => '_notify_sound_test' ],
													   	$this->gettext('idsw.notify.test')) ];
			default:
				break;

			}
		}

		return $int_call ? $set + self::show_general_prefs($args, true) : $args;
	}

	/**
	 * 	Save preferences in settings for default identity
	 *
	 * 	@param 	array $args
	 * 	@return array
	 */
	function save_default_identity_prefs(array $args): array
	{
		if ($args['section'] != 'folders' && $args['section'] != 'mailbox' && $args['section'] != 'general')
			return $args;

		$this->add_texts('localization');

		// common settings
		if ($args['section'] == 'general')
			return self::save_general_prefs($args);

		// special folder settings
		if ($args['section'] == 'folders')
			return self::save_special_folders_prefs($args);

		// mailbox settings
		if ($args['section'] == 'mailbox')
			return self::save_notification_prefs($args);

		return $args;
	}

	/**
	 * 	Save general preferences
	 *
	 * 	@param array $args
	 * 	@return array
	 */
	private function save_general_prefs(array $args): array
	{
	   	$iid = self::get('iid');
		$rec = self::get($iid);

        if (!empty($val = rcube_utils::get_input_value('_refresh_interval', rcube_utils::INPUT_POST)))
        {
        	$args['prefs']['refresh_interval'] = (int)$val * 60;
        	self::set($iid, 'newmail_check', $rec['newmail_check'] = (int)$val * 60);
        }

		if ($iid != $this->default)
		{
			$rc = rcmail::get_instance();

			$sql = 'UPDATE '.$rc->db->table_name(self::TABLE).
				   ' SET newmail_check = ? '.
				   ' WHERE iid = ?';
			$rc->db->query( $sql, $rec['newmail_check'], $iid);

			// abuse $plugin['abort'] to prevent RC main from saving prefs
			$args['abort'] 	= true;
			$args['result'] = true;
		}

		return $args;
	}

	/**
	 * 	Set special folder preferences
	 *
	 * 	@param array $args
	 * 	@return array
	 */
	private function save_special_folders_prefs(array $args): array
	{
	   	$iid = self::get('iid');
		$rec = self::get($iid);

		if ($args['prefs']['show_real_foldernames'])
			self::set($iid, 'flags', $rec['flags'] |= self::SHOW_REAL_FOLDER);
		else
			self::set($iid, 'flags', $rec['flags'] &= ~self::SHOW_REAL_FOLDER);

		if (isset($args['prefs']['lock_special_folders']) && $args['prefs']['lock_special_folders'] == '1')
			self::set($iid, 'flags', $rec['flags'] |= self::LOCK_SPECIAL_FOLDER);
		else
			self::set($iid, 'flags', $rec['flags'] &= ~self::LOCK_SPECIAL_FOLDER);

		$box = [];
		foreach (rcube_storage::$folder_types as $mbox)
			if ($args['prefs'][$mbox.'_mbox'])
				$box[$mbox] = $args['prefs'][$mbox.'_mbox'];

		self::set($iid, 'folders', $box);

		if ($iid != $this->default)
		{
			$rc = rcmail::get_instance();

			$sql = 'UPDATE '.$rc->db->table_name(self::TABLE).
				   ' SET flags = ?, folders = ?'.
				   ' WHERE iid = ?';
			$rc->db->query( $sql, $rec['flags'], json_encode($box), $iid);

			// abuse $plugin['abort'] to prevent RoundCube main from saving preferences
			$args['abort'] 	= true;
			$args['result'] = true;
		}

		return $args;
	}

	/**
	 * 	Save notification preferences
	 *
	 * 	@param array $args
	 * 	@return array
	 */
	private function save_notification_prefs(array $args): array
	{
	   	$iid = self::get('iid');
		$rec = self::get($iid);
		$rc  = rcmail::get_instance();

        if (!empty($val = rcube_utils::get_input_value('_check_all_folder', rcube_utils::INPUT_POST)))
        {
        	$args['prefs']['check_all_folders'] = '1';
        	self::set($iid, 'flags', $rec['flags'] |= self::CHECK_ALLFOLDER);
        } else {
        	$args['prefs']['check_all_folders'] = '0';
        	self::set($iid, 'flags', $rec['flags'] &= ~self::CHECK_ALLFOLDER);
        }

		foreach ([ 	'basic' 	=> self::NOTIFY_BASIC,
					'desktop'	=> self::NOTIFY_DESKTOP,
					'sound'		=> self::NOTIFY_SOUND 		] as $type => $flag) {
            $key = 'newmail_notifier_' . $type;
            if (!empty($val = rcube_utils::get_input_value('_notify_'.$type, rcube_utils::INPUT_POST)))
            {
                $args['prefs'][$key] = '1';
                self::set($iid, 'flags', $rec['flags'] |= $flag);
            } else {
            	$args['prefs'][$key] = '0';
                self::set($iid, 'flags', $rec['flags'] &= ~$flag);
            }
        }

        if (!empty($val = rcube_utils::get_input_value('_notify_timeout', rcube_utils::INPUT_POST)))
        {
        	$args['prefs']['newmail_notifier_desktop_timeout'] = $val;
        	self::set($iid, 'notify_timeout', $rec['notify_timeout'] = $val);
        }

		if ($iid != $this->default)
		{
			$sql = 'UPDATE '.$rc->db->table_name(self::TABLE).
				   ' SET flags = ?, notify_timeout = ? '.
				   ' WHERE iid = ?';
			$rc->db->query( $sql, $rec['flags'], $rec['notify_timeout'], $iid);

			// Abuse $plugin['abort'] to prevent RC main from saving prefs
			$args['abort'] 	= true;
			$args['result'] = true;
		}

		return $args;
	}

	/**
	 * 	Update identity preferences
	 *
	 * 	@param array $args
	 * 	@return array
	 */
	function upd_default_identity_prefs(array $args): array
	{
		// default identity?
		if ($args['record']['standard'])
		{
			// is label available?
			if (!($label = (string)rcube_utils::get_input_value('_label', rcube_utils::INPUT_POST)))
				$label = $args['record']['name'];
			self::set($this->default, 'label', $label);

			$rc  = rcmail::get_instance();
			$sql = 'SELECT label FROM '.$rc->db->table_name(self::TABLE).' WHERE iid = ?';
			if ($rc->db->fetch_assoc($rc->db->query($sql, $this->default)))
			{
				$sql = 'UPDATE '.
					   $rc->db->table_name(self::TABLE).
				   	   ' SET label = ? WHERE iid = ?';
				$rc->db->query($sql, $label, $this->default);
			}
			else
			{
				$sql = 'INSERT INTO '.
					   $rc->db->table_name(self::TABLE).
				   	   ' (user_id, iid, label) VALUES(?, ?, ?)';
				$rc->db->query($sql, $rc->user->ID, $this->default, $label);
			}
		}

		return $args;
	}

	/**
	 * 	Show identity switch preferences
	 *
	 * 	@param array $args
	 * 	@return array
	 */
	function show_identity_switch_prefs(array $args): array
	{
		$email = isset($args['record']['email']) ? $args['record']['email'] : '';

		// is this default identity?
		$default = isset($args['record']['identity_id']) && $args['record']['identity_id'] == $this->default;

		// apply configuration from identity_switch/config.inc.php
		if (!$default && is_array($cfg = $this->get_config($email)))
		{
			if (isset($args['record']['identity_id']))
			{
				// ensure to get default values
				self::get($iid = $args['record']['identity_id']);

				self::write_log('Applying predefined configuration for "'.$email.'".');

				// set up user name
				if ($cfg['user'])
				{
					switch (strtoupper($cfg['user']))
					{
					case 'EMAIL':
						self::set($iid, 'imap_user', $email);
						break;

					case 'MBOX':
						self::set($iid, 'imap_user', strstr($email, '@', true));

					default:
						break;
					}
				}
				// check for wild card
				if (strpos($cfg['imap'], '*'))
					$cfg['imap'] = str_replace('*', substr($email, strpos($email, '@') + 1), $cfg['imap']);
				if (strpos($cfg['smtp'], '*'))
					$cfg['smtp'] = str_replace('*', substr($email, strpos($email, '@') + 1), $cfg['smtp']);

				// parse and set host and related information
				$url = parse_url($cfg['imap']);
				self::set($iid, 'imap_host', isset($url['host']) ? rcube::Q($url['host'], 'url') : '');
				self::set($iid, 'imap_port', isset($url['port']) ? intval($url['port']) : '');
				if (strcasecmp('tls', $url['scheme']) === 0)
					self::set($iid, 'flags', self::get($iid, 'flags') | self::IMAP_TLS);
				if (strcasecmp('ssl', $url['scheme']) === 0)
					self::set($iid, 'flags', self::get($iid, 'flags') | self::IMAP_SSL);
				self::set($iid, 'imap_delim', $cfg['delimiter']);
				self::set($iid, 'newmail_check', (int)$cfg['interval']);

				$url = parse_url($cfg['smtp']);
				self::set($iid, 'smtp_host', isset($url['host']) ? rcube::Q($url['host'], 'url') : '');
				self::set($iid, 'smtp_port', isset($url['port']) ? intval($url['port']) : '');
				if (strcasecmp('tls', $url['scheme']) === 0)
					self::set($iid, 'flags', self::get($iid, 'flags') | self::SMTP_TLS);
				if (strcasecmp('ssl', $url['scheme']) === 0)
					self::set($iid, 'flags', self::get($iid, 'flags') | self::SMTP_SSL);
			}
		}

		$this->add_texts('localization');

		$args['form']['common'] = [
			'name' 	  => isset($args['record']['identity_id']) ? $this->gettext('idsw.common.caption') :
						 $this->gettext('idsw.common.noedit'),
			'content' => $this->show_identity_switch_common_prefs($args),
		];

		if (!$default)
		{
			$args['form']['imap'] = [
				'name' 	  => $this->gettext('idsw.imap.caption'),
				'content' => $this->show_identity_switch_imap_prefs($args),
			];

			$args['form']['smtp'] = [
				'name' 	  => $this->gettext('idsw.smtp.caption'),
				'content' => $this->show_identity_switch_smtp_prefs($args),
			];

			if (self::get('config', 'check'))
				$args['form']['notify'] = [
					'name' 	  => $this->gettext('idsw.notify.caption'),
					'content' => $this->show_notification_prefs($args, true),
				];
		}

		return $args;
	}

	/**
	 * 	Show common identity switch preferences
	 *
	 * 	@param array $args
	 * 	@return array
	 */
	private function show_identity_switch_common_prefs(array &$args): array
	{
		// edit existing identity record?
		if (isset($args['record']['identity_id']))
		{
	        $rec = self::get($args['record']['identity_id']);
	        $ro  = '';
			// is this default identity?
			$default = $args['record']['identity_id'] == $this->default;
		} else
		{
			$rec = self::get(self::USR);
			$ro  = 'true';
		}
        $args['record']['label'] = $rec['label'];

		$fields = [ 'label' => [ 'label' => $this->gettext('idsw.common.label'),
								 'type'  => 'text', 'maxlength' => 32 ], ];

 		if ($default)
			return $fields;

        $ise = $rec['flags'] & self::ENABLED ? '1' : '0';
		$ena = new html_checkbox([  'name' 		=> '_enabled',
								    'onchange'  => 'identity_switch_enabled();',
								  	'value' 	=> $ise,
									'disabled'	=> $ro, ]);

		return [ 'enabled' => [ 'label' => $this->gettext('idsw.common.enabled'),
							    'value' => $ena->show($ise), ], ] + $fields;
	}

	/**
	 * 	Show IMAP identity switch preferences
	 *
	 * 	@param array $args
	 * 	@return array
	 */
	private function show_identity_switch_imap_prefs(array &$args): array
	{
        // creating new identity?
		$rec = self::get(isset($args['record']['identity_id']) ? $args['record']['identity_id'] : self::USR);

		$authType = new html_select([ 'name' => "_imap_auth" ]);
		$authType->add($this->gettext('idsw.imap.auth.none'), 'none');
		$authType->add($this->gettext('idsw.imap.auth.ssl'), 'ssl');
		$authType->add($this->gettext('idsw.imap.auth.tls'), 'tls');

        $args['record']['imap_host'] 	= $rec['imap_host'];
        $enc 							= $rec['flags'] & self::IMAP_SSL ? 'ssl' :
										  ($rec['flags'] & self::IMAP_TLS ? 'tls' : 'none');
        $args['record']['imap_port'] 	= $rec['imap_port'];
        $args['record']['imap_user'] 	= $rec['imap_user'];
        $args['record']['imap_pwd'] 	= $rec['imap_pwd'] ? rcmail::get_instance()->decrypt($rec['imap_pwd']) : '';
        $args['record']['imap_delim'] 	= $rec['imap_delim'];

		return [
			'imap_host'	 	=> [ 'label' => $this->gettext('idsw.imap.host'),
								 'type'  => 'text', 'maxlength' => 64 ],
			'imap_auth' 	=> [ 'label' => $this->gettext('idsw.imap.auth'),
								 'value' => $authType->show($enc) ],
			'imap_port' 	=> [ 'label' => $this->gettext('idsw.imap.port'),
								 'type' => 'text', 'maxlength' => 5 ],
			'imap_user' 	=> [ 'label' => $this->gettext('idsw.imap.user'),
								 'type' => 'text', 'maxlength' => 32 ],
			'imap_pwd' 		=> [ 'label' => $this->gettext('idsw.imap.pwd'),
								 'type' => 'password', 'maxlength' => 128 ],
			'imap_delim'	=> [ 'label' => $this->gettext('idsw.imap.delim'),
							  	 'type' => 'text', 'maxlength' => 1 ],
		];
	}

	/**
	 * 	Show SMTP identity switch preferences
	 *
	 * 	@param array $args
	 * 	@return array
	 */
	private function show_identity_switch_smtp_prefs(array &$args): array
	{
        // creating new identity?
		$rec = self::get(isset($args['record']['identity_id']) ? $args['record']['identity_id'] : self::USR);

		$authType = new html_select([ 'name' => "_smtp_auth" ]);
		$authType->add($this->gettext('idsw.smtp.auth.none'), 'none');
		$authType->add($this->gettext('idsw.smtp.auth.ssl'), 'ssl');
		$authType->add($this->gettext('idsw.smtp.auth.tls'), 'tls');

        $args['record']['smtp_host'] = $rec['smtp_host'];
        $enc 						 = $rec['flags'] & self::SMTP_SSL ? 'ssl' :
									   ($rec['flags'] & self::SMTP_TLS ? 'tls' : 'none');
        $args['record']['smtp_port'] = $rec['smtp_port'];

        return [
			'smtp_host'	 	=> [ 'label' => $this->gettext('idsw.smtp.host'),
								 'type' => 'text', 'maxlength' => 64 ],
			'smtp_auth' 	=> [ 'label' => $this->gettext('idsw.smtp.auth'),
								 'value' => $authType->show($enc) ],
        	'smtp_port' 	=> [ 'label' => $this->gettext('idsw.smtp.port'),
								 'type' => 'text', 'maxlength' => 5 ],
		];
	}

	/**
	 * 	Create / Update identity switch preferences
	 *
	 * 	@param array $args
	 * 	@return array
	 */
	function update_identity_switch_prefs(array $args): array
	{
		$rc = rcmail::get_instance();

 		if (!self::get_field_value('0', 'enabled', false))
		{
			$sql = 'UPDATE '.$rc->db->table_name(self::TABLE).
				   ' SET flags = flags & ? WHERE iid = ? AND user_id = ?';
			$rc->db->query($sql, ~self::ENABLED, $args['id'], $rc->user->ID);
			return $args;
		}

		// check field values
		$rec = $this->check_field_values();
		if (isset($rec['err']))
		{
			$this->add_texts('localization');
			$args['break']   = $args['abort'] = true;
			$args['message'] = $this->gettext('idsw.err.'.$rec['err']);
			$args['result']  = false;

			return $args;
		}

		// any identity_switch data?
		if (!count($rec))
			return $args;

		$rec['iid'] = $args['id'];

		$sql = 'SELECT id, flags FROM '.$rc->db->table_name(self::TABLE).
			   ' WHERE iid = ? AND user_id = ?';
		$q = $rc->db->query($sql, $rec['iid'], $rc->user->ID);
		$r = $rc->db->fetch_assoc($q);

		// if record already exists, we will update it
		if ($r)
		{
			// record enabled?
			if (count($rec) == 1)
			{
				self::set($rec['iid'], 'flags', $rec['flags'] = self::get($rec['iid'], 'flags') & ~self::ENABLED);

				$sql = 'UPDATE '.$rc->db->table_name(self::TABLE).' SET flags = ? WHERE iid = ?';
				$q = $rc->db->query($sql, $rec['flags'], $rec['iid']);
				$r = $rc->db->fetch_assoc($q);

				return $args;
			}

			$sql = 'UPDATE '.
				$rc->db->table_name(self::TABLE).
				' SET flags = ?, label = ?, imap_host = ?, imap_port = ?, imap_delim = ?,'.
				' imap_user = ?, imap_pwd = ?, smtp_host = ?, smtp_port = ?, '.
				' notify_timeout = ?, newmail_check = ?, user_id = ?, iid = ?' .
				' WHERE id = ?';
		}
		// no record exists, create new one
		else if ($rec['flags'] & self::ENABLED)
		{
			$sql = 'INSERT INTO '.
				$rc->db->table_name(self::TABLE).
				'(flags, label, imap_host, imap_port, imap_delim, imap_user, imap_pwd,'.
				' smtp_host, smtp_port, notify_timeout, newmail_check, user_id, iid)'.
				' VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)';
		}

		// did we write anything?
		if ($sql)
		{
			// do we need to update password?
			if (isset($rec['imap_pwd']))
				$rec['imap_pwd'] = $rc->encrypt($rec['imap_pwd']);

			$rc->db->query(
				$sql,
				$rec['flags'],
				$rec['label'],
				$rec['imap_host'],
				$rec['imap_port'],
				$rec['imap_delim'],
				$rec['imap_user'],
				$rec['imap_pwd'],
				$rec['smtp_host'],
				$rec['smtp_port'],
				$rec['notify_timeout'],
				$rec['newmail_check'],
				$rc->user->ID,
				$rec['iid'],
				is_bool($r) ? 0 : $r['id'],
			);

			// update fields in cache
			foreach ($rec as $k => $v)
				if ($k != 'iid')
					self::set($rec['iid'], $k, $v);

			// update default identity data
			if (($iid = self::get('iid')) == $rec['iid'])
				self::swap($iid, self::get($iid));
		}

		return $args;
	}

	/**
	 * 	Delete identity switch prefereces
	 *
	 * 	@param array $args
	 * 	@return array
	 */
	function delete_identity_switch_prefs(array $args): array
	{
		$rc = rcmail::get_instance();

		$sql = 'DELETE FROM '.$rc->db->table_name(self::TABLE).' WHERE iid = ? AND user_id = ?';
		$q = $rc->db->query($sql, $args['id'], $rc->user->ID);
		if ($rc->db->affected_rows($q))
			$this->write_log('Deleted identity "'.$args['id'].'"');

		self::del($args['id']);

		// is default identity deleted - get first available idnetity
		if ($args['id'] == self::get('iid'))
			foreach (self::get() as $k => $rec)
				if (is_numeric($k))
				{
					self::swap((string)$k, $rec);
					break;
				}

		return $args;
	}

	/**
	 * 	Check settings field values
	 *
	 * 	@return array
	 */
	private function check_field_values(): array
	{
		$rec = self::get(-1);

		$iid = (string)rcube_utils::get_input_value('iid', rcube_utils::INPUT_POST);

		if (self::get_field_value($iid, 'enabled'))
			$rec['flags'] = self::ENABLED;
		else
			$rec['flags'] &= ~self::ENABLED;

		if (!($rec['label'] = self::get_field_value($iid, 'label')))
			$rec['label'] = 'identity_switch';

		if (!($rec['imap_host'] = self::get_field_value($iid, 'imap_host')))
			$rec['err'] = 'imap.host.miss';
		$rec['imap_auth'] = self::get_field_value($iid, 'imap_auth');
		$rec['imap_port'] = self::get_field_value($iid, 'imap_port');
		if (!($rec['imap_user'] = self::get_field_value($iid, 'imap_user')))
			$rec['err'] = 'imap.user.miss';
		if (!($rec['imap_pwd'] = self::get_field_value($iid, 'imap_pwd', true, true)))
			$rec['err'] = 'imap.pwd.miss';
		if (!($rec['imap_delim'] = self::get_field_value($iid, 'imap_delim')))
			$rec['err'] = 'imap.delim.miss';

		// check for overrides
		if ($rec['imap_host'] && substr($rec['imap_host'], 3, 3) == '://')
		{
			$rec['imap_auth'] = strtolower(substr($rec['imap_host'], 0, 3));
			$rec['imap_host'] = substr($rec['imap_host'], 6);
			if ($p = strpos($rec['imap_host'], ':'))
			{
				$rec['imap_port'] = substr($rec['imap_host'], $p + 1);
				$rec['imap_host'] = substr($rec['imap_host'], 0, $p);
			}
		}
		if (!$rec['imap_port'])
			$rec['err'] = 'imap.port.num';
		elseif (!ctype_digit($rec['imap_port']))
			$rec['err'] = 'imap.port.num';
		elseif (($rec['imap_port'] < 1 || $rec['imap_port'] > 65535))
			$rec['err'] = 'imap.port.range';
		if ($rec['imap_auth'] == 'ssl')
			$rec['flags'] |= self::IMAP_SSL;
		elseif ($rec['imap_auth'] == 'tls')
			$rec['flags'] |= self::IMAP_TLS;

		if (!($rec['smtp_host'] = self::get_field_value($iid, 'smtp_host')))
			$rec['err'] = 'smtp.host.miss';
		$rec['smtp_auth'] = self::get_field_value($iid, 'smtp_auth');
		$rec['smtp_port'] = self::get_field_value($iid, 'smtp_port');

		// check for overrides
		if ($rec['smtp_host'])
		{
			if (substr($rec['smtp_host'], 3, 3) == '://')
				$rec['smtp_host'] = substr($rec['smtp_host'], 6);
			if ($p = strpos($rec['smtp_host'], ':'))
			{
				$rec['smtp_port'] = substr($rec['smtp_host'], $p + 1);
				$rec['smtp_host'] = substr($rec['smtp_host'], 0, $p);
			}
		}
		if (!$rec['smtp_port'])
			$rec['err'] = 'smtp.port.num';
		elseif (!ctype_digit($rec['smtp_port']))
			$rec['err'] = 'smtp.port.num';
		elseif ($rec['smtp_port'] < 1 || $rec['smtp_port'] > 65535)
			$rec['err'] = 'smpt.port.range';
		if ($rec['smtp_auth'] == 'ssl')
			$rec['flags'] |= self::SMTP_SSL;
		elseif ($rec['smtp_auth'] == 'tls')
			$rec['flags'] |= self::SMTP_TLS;

		// Check notification options
		if (self::get_field_value($iid, 'check_all_folder'))
			$rec['flags'] |= self::CHECK_ALLFOLDER;
		if (self::get_field_value($iid, 'notify_basic'))
			$rec['flags'] |= self::NOTIFY_BASIC;
		if (self::get_field_value($iid, 'notify_desktop'))
			$rec['flags'] |= self::NOTIFY_DESKTOP;
		if (self::get_field_value($iid, 'notify_sound'))
			$rec['flags'] |= self::NOTIFY_SOUND;
		$rec['notify_timeout'] = (int)self::get_field_value($iid, 'notify_timeout');
		$rec['newmail_check'] = (int)self::get_field_value($iid, 'refresh_interval') * 60;

		return $rec;
	}


	/**
	 * 	Get field value in settings
	 *
	 * 	@param string $iid		identity_switch id
	 * 	@param string $field 	Field name
	 * 	@param bool $trim		Whether to trim data
	 * 	@param bool $html		Allow HTML tags in field value
	 * 	@return string|NULL		Request parameter value or NULL if not set
	 */
	private function get_field_value(string $iid, string $field, bool $trim = true, bool $html = false): ?string
	{
		if (!($rc = rcube_utils::get_input_value('_'.$field, rcube_utils::INPUT_POST, $html)) && $iid)
		{
			if ($field == 'imap_auth')
			{
				$rc = self::get($iid, 'flags');
				if ($rc & self::IMAP_SSL)
					$rc = 'ssl';
				elseif ($rc & self::IMAP_TLS)
					$rc = 'tls';
				else
					$rc = '';
			}
			elseif ($field == 'smtp_auth')
			{
				$rc = self::get($iid, 'flags');
				if ($rc & self::SMTP_SSL)
					$rc = 'ssl';
				elseif ($rc & self::SMTP_TLS)
					$rc = 'tls';
				else
					$rc = '';
			}
			elseif ($field == 'notify_all_folder')
			{
				$rc = self::get($iid, 'flags');
				$rc = $rc & self::CHECK_ALLFOLDER ? '1' : '0';
			}
			elseif ($field == 'notify_basic')
			{
				$rc = self::get($iid, 'flags');
				$rc = $rc & self::NOTIFY_BASIC ? '1' : '0';
			}
			elseif ($field == 'notify_desktop')
			{
				$rc = self::get($iid, 'flags');
				$rc = $rc & self::NOTIFY_DESKTOP ? '1' : '0';
			}
			elseif ($field == 'notify_sound')
			{
				$rc = self::get($iid, 'flags');
				$rc = $rc & self::NOTIFY_SOUND ? '1' : '0';
			}
			else
				$rc = self::get($iid, $field);
		}

		if (!$trim)
			return $rc;

		if (is_null($rc))
			return $rc;

		if (!is_string($rc))
			$rc = (string)$rc;

		$s = trim($rc);
		if (!$s)
			return null;
		else
			$rc = $s;

		return $rc;
	}

	/**
	 * 	Swap identity data
	 *
	 *	@param string
	 * 	@param array
	 */
	protected function swap(string $iid, array $rec): void
	{
		$rc = rcmail::get_instance();

		$rc->session->remove('folders');
		$rc->session->remove('unseen_count');

		$_SESSION['_name'] 				= $rec['label'];
		$_SESSION['username'] 			= $rec['imap_user'];
		$_SESSION['password'] 			= $rec['imap_pwd'];
		$_SESSION['storage_host'] 		= $rec['imap_host'];
		$_SESSION['storage_port'] 		= $rec['imap_port'];
		$_SESSION['storage_ssl'] 		= $rec['flags'] & self::IMAP_SSL ? 'ssl' :
										  ($rec['flags'] & self::IMAP_TLS ? 'tls' : '');
		$_SESSION['imap_delimiter'] 	= $rec['imap_delim'];
		$_SESSION['unseen']				= $rec['unseen'];
		self::set('iid', $iid);

		$prefs = $rc->user->get_prefs();

		// set special folder
		$prefs['show_real_foldernames'] = $rec['flags'] & self::SHOW_REAL_FOLDER ? true : false;
		$prefs['lock_special_folders'] = $rec['flags'] & self::LOCK_SPECIAL_FOLDER ? true : false;
		if (isset($rec['folders']) && is_array($rec['folders']))
			foreach ($rec['folders'] as $k => $v)
				$prefs[$k.'_mbox'] = $v;
		$prefs['check_all_folders'] = $rec['flags'] & self::CHECK_ALLFOLDER ? '1' : '0';
		$prefs['newmail_notifier_desktop_timeout'] = $rec['notify_timeout'];

		// set notification
		foreach ([ 	self::NOTIFY_BASIC		=> 'basic',
					self::NOTIFY_DESKTOP	=> 'desktop',
					self::NOTIFY_SOUND		=> 'sound' ] as $k => $v)
			if ($rec['flags'] & $k)
				$prefs['newmail_notifier_'.$v] = '1';
		$prefs['newmail_notifier_timeout'] = $rec['notify_timeout'];
	    $rc->user->save_prefs($prefs);

	    // set new default identity
	    self::set('iid', $iid);
	}

	/**
	 * 	Process config.inc.php
	 *
	 * 	@param string $email	Users eMail
	 * 	@return bool|array
	 */
	private function get_config(string $email): bool|array
	{
		// get domain of identity
		if (!($p = strstr($email, '@')) || !($dom = substr($p, 1)))
			return false;

		// load config.inc.php.dist
		$this->load_config();

		$cfg = rcmail::get_instance()->config->get('identity_switch.config', []);

		if (!isset($cfg[$dom]) && !isset($cfg['*']))
			return false;

		if (!isset($cfg[$dom]) && isset($cfg['*']))
			$dom = '*';

		$cfg[$dom]['logging'] 	= $cfg['logging'];
		$cfg[$dom]['check'] 	= $cfg['check'];
		$cfg[$dom]['interval'] 	= $cfg['interval'];
		$cfg[$dom]['retries'] 	= $cfg['retries'];
		$cfg[$dom]['debug'] 	= $cfg['debug'];

		return $cfg[$dom];
	}

	/**
	 * 	Set variable in cache
	 *
	 * 	@param string|int $sect
	 * 	@param array|string|int $var
	 * 	@param string|int|bool $val
	 * 	@param string|int|bool $default
	 */
	protected function set(string|int $sect, array|string|int $var, mixed $val = null, string|int|bool $default = null): void
	{
		// table defied?
		if (!isset($_SESSION[self::TABLE]))
			$_SESSION[self::TABLE] = [];

		if (is_array($var))
		{
			if (!isset($_SESSION[self::TABLE][$sect]))
				$_SESSION[self::TABLE][$sect] = [];
			foreach ($var as $k => $v)
				$_SESSION[self::TABLE][$sect][$k] = is_null($v) ? $default : $v;
		} elseif (is_null($val))
			$_SESSION[self::TABLE][$sect] = $var;
		else
			$_SESSION[self::TABLE][$sect][$var] = $val;
	}

	/**
	 * 	Get cached variable
	 *
	 * 	@param  string|int $sect
	 * 	@param  string|int $var
	 * 	@return string|int|bool|array
	 */
	protected function get(string|int $sect = null, string|int $var = null): mixed
	{
		// get whole table?
		if (!$sect && !$var)
		{
			if (!isset($_SESSION[self::TABLE]))
				$_SESSION[self::TABLE] = [];
			return $_SESSION[self::TABLE];
		}

		if ($sect && $var && isset($_SESSION[self::TABLE][$sect][$var]))
			return $_SESSION[self::TABLE][$sect][$var];
		elseif (isset($_SESSION[self::TABLE][$sect]))
			return $_SESSION[self::TABLE][$sect];

		// not found

		// load configuration?
		if (!isset($_SESSION[self::TABLE]['config']))
		{
			parent::load_config();
			$rc = rcmail::get_instance();
			foreach ($rc->config->get('identity_switch.config', []) as $k => $v)
			{
				if ($k == 'logging' || $k == 'debug')
					self::set('config', $k, (bool)$v, false);
				if ($k == 'check')
					self::set('config', $k, (bool)$v, true);
				if ($k == 'interval')
					self::set('config', $k, (int)$v, 30);
				if ($k == 'delay')
					self::set('config', $k, (int)$v, 0);
				if ($k == 'retries')
					self::set('config', $k, (int)$v, 10);
				if ($k == 'wait')
					self::set('config', $k, (int)$v, 60);
			}
			self::set('iid', 0);
			self::set('config', 'language', $_SESSION['language']);

			self::set('config', 'cache', $c = $rc->config->get('temp_dir', sys_get_temp_dir()).
					  '/identity_switch_cache.'.session_id());
			self::set('config', 'data',  str_replace('_cache', '_ret', $c));
			self::set('config', 'fp', 0);
			self::set('lock', 0);
		}

		if (!is_numeric($sect))
			return '';

		$rc = [
			'label'  			=> 'identity_label',					// label
 			'flags'				=> 0,									// flags
 			'imap_user'			=> '',									// IMAP user
			'imap_pwd'			=> '',									// IMAP password
			'imap_host'			=> 'localhost',							// IMAP host
			'imap_delim'		=> '.',									// folder delimiter
			'imap_port'			=> 143,									// IMAP port
			'smtp_host'			=> 'localhost', 						// SMTP host
			'smtp_port'			=> 25,									// SMTP port
			'notify_timeout'	=> 10,									// notification timeout (defaults to 10 sec.)
			'newmail_check'		=> self::get('config', 'interval'),		// new mail check interval
			'folders'			=> [],									// special folder name array
			'unseen'			=> 0,									// # of unseen messages
			'checked_last'		=> 0,									// last time checked
			'notify'			=> false,								// notify user flag
		];

		// save defaults
		foreach ($rc as $k => $v)
			self::set($sect, $k, $v);

		return $rc;
	}

	/**
	 * 	Delete cached variable
	 *
	 * 	@param string|int $sect
	 * 	@param string $var
	 */
	protected function del(string|int $sect = null, string $var = null): void
	{
		if (!$sect && !$var)
			$_SESSION[self::TABLE] = [];

		if ($sect)
			unset($_SESSION[self::TABLE][$sect]);
		else
			unset($_SESSION[self::TABLE][$var]);
	}

	/**
	 * 	Write log message
	 *
	 * 	@param string $txt 		Log message
	 * 	@param bool   $debug 	TRUE=Is debug message; FALSE=regular message (default)
	 */
	static public function write_log(string $txt, bool $debug = false): void
	{
		if (!$debug && isset($_SESSION[self::TABLE]['config']) && $_SESSION[self::TABLE]['config']['logging'])
			rcmail::get_instance()->write_log('identity_switch', $txt);

		if ($debug && isset($_SESSION[self::TABLE]['config']) && $_SESSION[self::TABLE]['config']['debug'])
			rcmail::get_instance()->write_log('identity_switch', $txt);
	}

}