<?php
/*
** Zabbix
** Copyright (C) 2001-2016 Zabbix SIA
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/


require_once dirname(__FILE__).'/include/config.inc.php';
require_once dirname(__FILE__).'/include/hosts.inc.php';
require_once dirname(__FILE__).'/include/triggers.inc.php';
require_once dirname(__FILE__).'/include/forms.inc.php';

$page['title'] = _('Configuration of triggers');
$page['file'] = 'triggers.php';
$page['hist_arg'] = array('hostid', 'groupid');

require_once dirname(__FILE__).'/include/page_header.php';

// VAR	TYPE	OPTIONAL	FLAGS	VALIDATION	EXCEPTION
$fields = array(
	'groupid' =>			array(T_ZBX_INT, O_OPT, P_SYS,	DB_ID,		null),
	'hostid' =>				array(T_ZBX_INT, O_OPT, P_SYS,	DB_ID,		null),
	'triggerid' =>			array(T_ZBX_INT, O_OPT, P_SYS,	DB_ID,		'(isset({form})&&({form}=="update"))'),
	'copy_type' =>			array(T_ZBX_INT, O_OPT, P_SYS,	IN('0,1'),	'isset({copy})'),
	'copy_mode' =>			array(T_ZBX_INT, O_OPT, P_SYS,	IN('0'),	null),
	'type' =>				array(T_ZBX_INT, O_OPT, null,	IN('0,1'),	null),
	'description' =>		array(T_ZBX_STR, O_OPT, null,	NOT_EMPTY,	'isset({save})', _('Name')),
	'expression' =>			array(T_ZBX_STR, O_OPT, null,	NOT_EMPTY,	'isset({save})', _('Expression')),
	'priority' =>			array(T_ZBX_INT, O_OPT, null,	IN('0,1,2,3,4,5'), 'isset({save})'),
	'comments' =>			array(T_ZBX_STR, O_OPT, null,	null,		'isset({save})'),
	'url' =>				array(T_ZBX_STR, O_OPT, null,	null,		'isset({save})'),
	'status' =>				array(T_ZBX_STR, O_OPT, null,	null,		null),
	'input_method' =>		array(T_ZBX_INT, O_OPT, null,	NOT_EMPTY,	'isset({toggle_input_method})'),
	'expr_temp' =>			array(T_ZBX_STR, O_OPT, null,	NOT_EMPTY,	'(isset({add_expression})||isset({and_expression})||isset({or_expression})||isset({replace_expression}))', _('Expression')),
	'expr_target_single' => array(T_ZBX_STR, O_OPT, null,	NOT_EMPTY,	'(isset({and_expression})||isset({or_expression})||isset({replace_expression}))'),
	'dependencies' =>		array(T_ZBX_INT, O_OPT, null,	DB_ID,		null),
	'new_dependency' =>		array(T_ZBX_INT, O_OPT, null,	DB_ID.'{}>0', 'isset({add_dependency})'),
	'g_triggerid' =>		array(T_ZBX_INT, O_OPT, null,	DB_ID,		null),
	'copy_targetid' =>		array(T_ZBX_INT, O_OPT, null,	DB_ID,		null),
	'filter_groupid' =>		array(T_ZBX_INT, O_OPT, P_SYS,	DB_ID,		'isset({copy})&&(isset({copy_type})&&({copy_type}==0))'),
	'showdisabled' =>		array(T_ZBX_INT, O_OPT, P_SYS,	IN('0,1'),	null),
	'massupdate' =>			array(T_ZBX_STR, O_OPT, P_SYS,	null,		null),
	'visible' =>			array(T_ZBX_STR, O_OPT, null,	null,		null),
	// actions
	'go' =>					array(T_ZBX_STR, O_OPT, P_SYS|P_ACT, null,	null),
	'toggle_input_method' =>array(T_ZBX_STR, O_OPT, P_SYS|P_ACT, null,	null),
	'add_expression' =>		array(T_ZBX_STR, O_OPT, P_SYS|P_ACT, null,	null),
	'and_expression' =>		array(T_ZBX_STR, O_OPT, P_SYS|P_ACT, null,	null),
	'or_expression' =>		array(T_ZBX_STR, O_OPT, P_SYS|P_ACT, null,	null),
	'replace_expression' =>	array(T_ZBX_STR, O_OPT, P_SYS|P_ACT, null,	null),
	'remove_expression' =>	array(T_ZBX_STR, O_OPT, P_SYS|P_ACT, null,	null),
	'test_expression' =>	array(T_ZBX_STR, O_OPT, P_SYS|P_ACT, null,	null),
	'add_dependency' =>		array(T_ZBX_STR, O_OPT, P_SYS|P_ACT, null,	null),
	'group_enable' =>		array(T_ZBX_STR, O_OPT, P_SYS|P_ACT, null,	null),
	'group_disable' =>		array(T_ZBX_STR, O_OPT, P_SYS|P_ACT, null,	null),
	'group_delete' =>		array(T_ZBX_STR, O_OPT, P_SYS|P_ACT, null,	null),
	'copy' =>				array(T_ZBX_STR, O_OPT, P_SYS|P_ACT, null,	null),
	'clone' =>				array(T_ZBX_STR, O_OPT, P_SYS|P_ACT, null,	null),
	'save' =>				array(T_ZBX_STR, O_OPT, P_SYS|P_ACT, null,	null),
	'mass_save' =>			array(T_ZBX_STR, O_OPT, P_SYS|P_ACT, null,	null),
	'delete' =>				array(T_ZBX_STR, O_OPT, P_SYS|P_ACT, null,	null),
	'cancel' =>				array(T_ZBX_STR, O_OPT, P_SYS,	null,		null),
	'form' =>				array(T_ZBX_STR, O_OPT, P_SYS,	null,		null),
	'form_refresh' =>		array(T_ZBX_INT, O_OPT, null,	null,		null)
);
$_REQUEST['showdisabled'] = get_request('showdisabled', CProfile::get('web.triggers.showdisabled', 1));

check_fields($fields);
validate_sort_and_sortorder('description', ZBX_SORT_UP);

$_REQUEST['status'] = isset($_REQUEST['status']) ? TRIGGER_STATUS_ENABLED : TRIGGER_STATUS_DISABLED;
$_REQUEST['type'] = isset($_REQUEST['type']) ? TRIGGER_MULT_EVENT_ENABLED : TRIGGER_MULT_EVENT_DISABLED;
$_REQUEST['go'] = get_request('go', 'none');

// Validate permissions to single trigger.
$triggerId = getRequest('triggerid');

if ($triggerId !== null) {
	$trigger = API::Trigger()->get(array(
		'triggerids' => array($triggerId),
		'output' => array('triggerid'),
		'filter' => array('flags' => ZBX_FLAG_DISCOVERY_NORMAL),
		'editable' => true
	));

	if (!$trigger) {
		access_deny();
	}
}

// Validate permissions to a group of triggers for mass enable/disable actions.
$triggerIds = getRequest('g_triggerid', array());
$triggerIds = zbx_toArray($triggerIds);

if ($triggerIds && !API::Trigger()->isWritable($triggerIds)) {
	access_deny();
}

// Validate permissions to host.
if (get_request('hostid') && !API::Host()->isWritable(array($_REQUEST['hostid']))) {
	access_deny();
}
/*
 * Actions
 */
if (isset($_REQUEST['add_expression'])) {
	$_REQUEST['expression'] = $_REQUEST['expr_temp'];
	$_REQUEST['expr_temp'] = '';
}
elseif (isset($_REQUEST['and_expression'])) {
	$_REQUEST['expr_action'] = '&';
}
elseif (isset($_REQUEST['or_expression'])) {
	$_REQUEST['expr_action'] = '|';
}
elseif (isset($_REQUEST['replace_expression'])) {
	$_REQUEST['expr_action'] = 'r';
}
elseif (isset($_REQUEST['remove_expression']) && zbx_strlen($_REQUEST['remove_expression'])) {
	$_REQUEST['expr_action'] = 'R';
	$_REQUEST['expr_target_single'] = $_REQUEST['remove_expression'];
}
elseif (isset($_REQUEST['clone']) && isset($_REQUEST['triggerid'])) {
	unset($_REQUEST['triggerid']);
	$_REQUEST['form'] = 'clone';
}
elseif (isset($_REQUEST['save'])) {
	$trigger = array(
		'expression' => $_REQUEST['expression'],
		'description' => $_REQUEST['description'],
		'priority' => $_REQUEST['priority'],
		'status' => $_REQUEST['status'],
		'type' => $_REQUEST['type'],
		'comments' => $_REQUEST['comments'],
		'url' => $_REQUEST['url'],
		'dependencies' => zbx_toObject(get_request('dependencies', array()), 'triggerid')
	);

	if (get_request('triggerid')) {
		// update only changed fields
		$oldTrigger = API::Trigger()->get(array(
			'triggerids' => $_REQUEST['triggerid'],
			'output' => API_OUTPUT_EXTEND,
			'selectDependencies' => array('triggerid')
		));
		if (!$oldTrigger) {
			access_deny();
		}

		$oldTrigger = reset($oldTrigger);
		$oldTrigger['dependencies'] = zbx_toHash(zbx_objectValues($oldTrigger['dependencies'], 'triggerid'));

		$newDependencies = $trigger['dependencies'];
		$oldDependencies = $oldTrigger['dependencies'];
		unset($trigger['dependencies']);
		unset($oldTrigger['dependencies']);

		$triggerToUpdate = array_diff_assoc($trigger, $oldTrigger);
		$triggerToUpdate['triggerid'] = $_REQUEST['triggerid'];

		// dependencies
		$updateDepencencies = false;
		if (count($newDependencies) != count($oldDependencies)) {
			$updateDepencencies = true;
		}
		else {
			foreach ($newDependencies as $dependency) {
				if (!isset($oldDependencies[$dependency['triggerid']])) {
					$updateDepencencies = true;
				}
			}
		}
		if ($updateDepencencies) {
			$triggerToUpdate['dependencies'] = $newDependencies;
		}
		$result = API::Trigger()->update($triggerToUpdate);
		show_messages($result, _('Trigger updated'), _('Cannot update trigger'));
	}
	else {
		$result = API::Trigger()->create($trigger);
		show_messages($result, _('Trigger added'), _('Cannot add trigger'));
	}

	if ($result) {
		unset($_REQUEST['form']);
		clearCookies($result, $_REQUEST['hostid']);
	}
}
elseif (isset($_REQUEST['delete']) && isset($_REQUEST['triggerid'])) {
	DBstart();

	$result = API::Trigger()->delete($_REQUEST['triggerid']);
	$result = DBend($result);

	show_messages($result, _('Trigger deleted'), _('Cannot delete trigger'));
	clearCookies($result, $_REQUEST['hostid']);

	if ($result) {
		unset($_REQUEST['form'], $_REQUEST['triggerid']);
	}
}
elseif (isset($_REQUEST['add_dependency']) && isset($_REQUEST['new_dependency'])) {
	if (!isset($_REQUEST['dependencies'])) {
		$_REQUEST['dependencies'] = array();
	}
	foreach ($_REQUEST['new_dependency'] as $triggerid) {
		if (!uint_in_array($triggerid, $_REQUEST['dependencies'])) {
			array_push($_REQUEST['dependencies'], $triggerid);
		}
	}
}
elseif ($_REQUEST['go'] == 'massupdate' && isset($_REQUEST['mass_save']) && isset($_REQUEST['g_triggerid'])) {
	$visible = get_request('visible', array());

	// update triggers
	$triggersToUpdate = array();
	foreach ($_REQUEST['g_triggerid'] as $triggerid) {
		$trigger = array('triggerid' => $triggerid);

		if (isset($visible['priority'])) {
			$trigger['priority'] = get_request('priority');
		}
		if (isset($visible['dependencies'])) {
			$trigger['dependencies'] = zbx_toObject(get_request('dependencies', array()), 'triggerid');
		}

		$triggersToUpdate[] = $trigger;
	}

	DBstart();

	$result = API::Trigger()->update($triggersToUpdate);
	$result = DBend($result);

	show_messages($result, _('Trigger updated'), _('Cannot update trigger'));
	clearCookies($result, $_REQUEST['hostid']);

	if ($result) {
		unset($_REQUEST['massupdate'], $_REQUEST['form'], $_REQUEST['g_triggerid']);
	}
}
elseif (str_in_array(getRequest('go'), array('activate', 'disable')) && hasRequest('g_triggerid')) {
	$enable = (getRequest('go') == 'activate');
	$status = $enable ? TRIGGER_STATUS_ENABLED : TRIGGER_STATUS_DISABLED;
	$update = array();

	// get requested triggers with permission check
	$dbTriggers = API::Trigger()->get(array(
		'output' => array('triggerid', 'status'),
		'triggerids' => getRequest('g_triggerid'),
		'editable' => true
	));

	if ($dbTriggers) {
		foreach ($dbTriggers as $dbTrigger) {
			$update[] = array(
				'triggerid' => $dbTrigger['triggerid'],
				'status' => $status
			);
		}

		$result = API::Trigger()->update($update);
	}
	else {
		$result = true;
	}

	$updated = count($update);
	$messageSuccess = $enable
		? _n('Trigger enabled', 'Triggers enabled', $updated)
		: _n('Trigger disabled', 'Triggers disabled', $updated);
	$messageFailed = $enable
		? _n('Cannot enable trigger', 'Cannot enable triggers', $updated)
		: _n('Cannot disable trigger', 'Cannot disable triggers', $updated);

	show_messages($result, $messageSuccess, $messageFailed);
	clearCookies($result, getRequest('hostid'));
}
elseif ($_REQUEST['go'] == 'copy_to' && isset($_REQUEST['copy']) && isset($_REQUEST['g_triggerid'])) {
	if (isset($_REQUEST['copy_targetid']) && $_REQUEST['copy_targetid'] > 0 && isset($_REQUEST['copy_type'])) {
		if ($_REQUEST['copy_type'] == 0) { // hosts
			$hosts_ids = $_REQUEST['copy_targetid'];
		}
		else { // groups
			$hosts_ids = array();
			$group_ids = $_REQUEST['copy_targetid'];

			$db_hosts = DBselect(
				'SELECT DISTINCT h.hostid'.
				' FROM hosts h,hosts_groups hg'.
				' WHERE h.hostid=hg.hostid'.
					' AND '.dbConditionInt('hg.groupid', $group_ids)
			);
			while ($db_host = DBfetch($db_hosts)) {
				$hosts_ids[] = $db_host['hostid'];
			}
		}

		DBstart();

		$goResult = copyTriggersToHosts($_REQUEST['g_triggerid'], $hosts_ids, get_request('hostid'));
		$goResult = DBend($goResult);

		show_messages($goResult, _('Trigger added'), _('Cannot add trigger'));
		clearCookies($goResult, $_REQUEST['hostid']);

		$_REQUEST['go'] = 'none2';
	}
	else {
		show_error_message(_('No target selected'));
	}
}
elseif ($_REQUEST['go'] == 'delete' && isset($_REQUEST['g_triggerid'])) {
	$goResult = API::Trigger()->delete($_REQUEST['g_triggerid']);

	show_messages($goResult, _('Triggers deleted'), _('Cannot delete triggers'));
	clearCookies($goResult, $_REQUEST['hostid']);
}

/*
 * Display
 */
if ($_REQUEST['go'] == 'massupdate' && isset($_REQUEST['g_triggerid'])) {
	$triggersView = new CView('configuration.triggers.massupdate', getTriggerMassupdateFormData());
	$triggersView->render();
	$triggersView->show();
}
elseif (isset($_REQUEST['form'])) {
	$triggersView = new CView('configuration.triggers.edit', getTriggerFormData());
	$triggersView->render();
	$triggersView->show();
}
elseif ($_REQUEST['go'] == 'copy_to' && isset($_REQUEST['g_triggerid'])) {
	$triggersView = new CView('configuration.copy.elements', getCopyElementsFormData('g_triggerid', _('CONFIGURATION OF TRIGGERS')));
	$triggersView->render();
	$triggersView->show();
}
else {
	$data = array(
		'showdisabled' => get_request('showdisabled', 1),
		'parent_discoveryid' => null,
		'triggers' => array(),
		'displayNodes' => (is_array(get_current_nodeid()) && empty($_REQUEST['groupid']) && empty($_REQUEST['hostid']))
	);
	CProfile::update('web.triggers.showdisabled', $data['showdisabled'], PROFILE_TYPE_INT);

	$data['pageFilter'] = new CPageFilter(array(
		'groups' => array('not_proxy_hosts' => true, 'editable' => true),
		'hosts' => array('templated_hosts' => true, 'editable' => true),
		'triggers' => array('editable' => true),
		'groupid' => get_request('groupid', null),
		'hostid' => get_request('hostid', null),
		'triggerid' => get_request('triggerid', null)
	));
	if ($data['pageFilter']->triggerid > 0) {
		$data['triggerid'] = $data['pageFilter']->triggerid;
	}
	$data['groupid'] = $data['pageFilter']->groupid;
	$data['hostid'] = $data['pageFilter']->hostid;

	// get triggers
	$sortfield = getPageSortField('description');
	$sortorder = getPageSortOrder();

	if ($data['pageFilter']->hostsSelected) {
		$options = array(
			'editable' => true,
			'sortfield' => $sortfield,
			'limit' => $config['search_limit'] + 1
		);

		if ($sortfield === 'status') {
			$options['output'] = array('triggerid', 'status', 'state');
		}
		else {
			$options['output'] = array('triggerid', $sortfield);
		}

		if (empty($data['showdisabled'])) {
			$options['filter']['status'] = TRIGGER_STATUS_ENABLED;
		}
		if ($data['pageFilter']->hostid > 0) {
			$options['hostids'] = $data['pageFilter']->hostid;
		}
		elseif ($data['pageFilter']->groupid > 0) {
			$options['groupids'] = $data['pageFilter']->groupid;
		}
		$data['triggers'] = API::Trigger()->get($options);
	}

	$_REQUEST['hostid'] = get_request('hostid', $data['pageFilter']->hostid);

	// sort for paging
	if ($sortfield === 'status') {
		orderTriggersByStatus($data['triggers'], $sortorder);
	}
	else {
		order_result($data['triggers'], $sortfield, $sortorder);
	}

	$data['paging'] = getPagingLine($data['triggers'], array('triggerid'), array('hostid' => $_REQUEST['hostid']));

	$data['triggers'] = API::Trigger()->get(array(
		'triggerids' => zbx_objectValues($data['triggers'], 'triggerid'),
		'output' => API_OUTPUT_EXTEND,
		'selectHosts' => API_OUTPUT_EXTEND,
		'selectItems' => array('itemid', 'hostid', 'key_', 'type', 'flags', 'status'),
		'selectFunctions' => API_OUTPUT_EXTEND,
		'selectDependencies' => API_OUTPUT_EXTEND,
		'selectDiscoveryRule' => API_OUTPUT_EXTEND
	));

	// sort for displaying full results
	if ($sortfield === 'status') {
		orderTriggersByStatus($data['triggers'], $sortorder);
	}
	else {
		order_result($data['triggers'], $sortfield, $sortorder);
	}

	// get real hosts
	$data['realHosts'] = getParentHostsByTriggers($data['triggers']);

	// determine, show or not column of errors
	$data['showErrorColumn'] = true;
	if ($data['hostid'] > 0) {
		$host = API::Host()->get(array(
			'hostids' => $_REQUEST['hostid'],
			'output' => array('status'),
			'templated_hosts' => true,
			'editable' => true
		));
		$host = reset($host);
		$data['showErrorColumn'] = (!$host || $host['status'] != HOST_STATUS_TEMPLATE);
	}

	// nodes
	if ($data['displayNodes']) {
		foreach ($data['triggers'] as &$trigger) {
			$trigger['nodename'] = get_node_name_by_elid($trigger['triggerid'], true);
		}
		unset($trigger);
	}

	// render view
	$triggersView = new CView('configuration.triggers.list', $data);
	$triggersView->render();
	$triggersView->show();
}

require_once dirname(__FILE__).'/include/page_footer.php';
