A.F....... [ZBXNEXT-6288] removed screen API endpoint

7 files changed, 3 insertions, 2363 deletions

diff --git a/ui/app/controllers/CControllerPopupGeneric.php b/ui/app/controllers/CControllerPopupGeneric.php
index aad1e3c880e..7ad41bde779 100644
--- a/ui/app/controllers/CControllerPopupGeneric.php
+++ b/ui/app/controllers/CControllerPopupGeneric.php
@@ -282,18 +282,6 @@ class CControllerPopupGeneric extends CController {
 					_('Name')
 				]
 			],
-			'screens' => [
-				'title' => _('Screens'),
-				'min_user_type' => USER_TYPE_ZABBIX_USER,
-				'allowed_src_fields' => 'screenid',
-				'form' => [
-					'name' => 'screenform',
-					'id' => 'screens'
-				],
-				'table_columns' => [
-					_('Name')
-				]
-			],
 			'graphs' => [
 				'title' => _('Graphs'),
 				'min_user_type' => USER_TYPE_ZABBIX_USER,
@@ -427,7 +415,6 @@ class CControllerPopupGeneric extends CController {
 			'hostid' =>								'db hosts.hostid',
 			'host' =>								'string',
 			'parent_discoveryid' =>					'db items.itemid',
-			'screenid' =>							'db screens.screenid',
 			'templates' =>							'string|not_empty',
 			'host_templates' =>						'string|not_empty',
 			'multiselect' =>						'in 1',
@@ -737,7 +724,7 @@ class CControllerPopupGeneric extends CController {
 	 */
 	protected function getPageOptions(): array {
 		$option_fields_binary = ['noempty', 'real_hosts', 'submit_parent', 'with_items', 'writeonly'];
-		$option_fields_value = ['host_templates', 'screenid'];
+		$option_fields_value = ['host_templates'];
 
 		$page_options = [
 			'srcfld1' => $this->getInput('srcfld1', ''),
@@ -1256,15 +1243,6 @@ class CControllerPopupGeneric extends CController {
 				CArrayHelper::sort($records, ['name']);
 				break;
 
-			case 'screens':
-				$options += [
-					'output' => ['screenid', 'name']
-				];
-
-				$records = API::Screen()->get($options);
-				CArrayHelper::sort($records, ['name']);
-				break;
-
 			case 'drules':
 				$records = API::DRule()->get([
 					'output' => ['druleid', 'name'],
diff --git a/ui/include/classes/api/API.php b/ui/include/classes/api/API.php
index b4262762c2f..5529dcbee3b 100644
--- a/ui/include/classes/api/API.php
+++ b/ui/include/classes/api/API.php
@@ -347,20 +347,6 @@ class API {
 	}
 
 	/**
-	 * @return CScreen
-	 */
-	public static function Screen() {
-		return self::getApi('screen');
-	}
-
-	/**
-	 * @return CScreenItem
-	 */
-	public static function ScreenItem() {
-		return self::getApi('screenitem');
-	}
-
-	/**
 	 * @return CScript
 	 */
 	public static function Script() {
diff --git a/ui/include/classes/api/CApiServiceFactory.php b/ui/include/classes/api/CApiServiceFactory.php
index 96112d7aa25..a17704f92e1 100644
--- a/ui/include/classes/api/CApiServiceFactory.php
+++ b/ui/include/classes/api/CApiServiceFactory.php
@@ -63,8 +63,6 @@ class CApiServiceFactory extends CRegistryFactory {
 		'proxy' => CProxy::class,
 		'role' => CRole::class,
 		'service' => CService::class,
-		'screen' => CScreen::class,
-		'screenitem' => CScreenItem::class,
 		'script' => CScript::class,
 		'settings' => CSettings::class,
 		'task' => CTask::class,
diff --git a/ui/include/classes/api/services/CScreen.php b/ui/include/classes/api/services/CScreen.php
deleted file mode 100644
index 8d9a4628d5f..00000000000
--- a/ui/include/classes/api/services/CScreen.php
+++ /dev/null
@@ -1,1374 +0,0 @@
-<?php
-/*
-** Zabbix
-** Copyright (C) 2001-2021 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.
-**/
-
-
-/**
- * Class containing methods for operations with screens.
- */
-class CScreen extends CApiService {
-
-	public const ACCESS_RULES = [
-		'get' => ['min_user_type' => USER_TYPE_ZABBIX_USER],
-		'create' => ['min_user_type' => USER_TYPE_ZABBIX_USER, 'action' => CRoleHelper::ACTIONS_EDIT_DASHBOARDS],
-		'update' => ['min_user_type' => USER_TYPE_ZABBIX_USER, 'action' => CRoleHelper::ACTIONS_EDIT_DASHBOARDS],
-		'delete' => ['min_user_type' => USER_TYPE_ZABBIX_USER, 'action' => CRoleHelper::ACTIONS_EDIT_DASHBOARDS]
-	];
-
-	protected $tableName = 'screens';
-	protected $tableAlias = 's';
-	protected $sortColumns = ['screenid', 'name'];
-
-	/**
-	 * Get screen data.
-	 *
-	 * @param array  $options
-	 * @param bool   $options['editable']		only with read-write permission. Ignored for SuperAdmins
-	 * @param int    $options['count']			count Hosts, returned column name is rowscount
-	 * @param string $options['pattern']		search hosts by pattern in host names
-	 * @param int    $options['limit']			limit selection
-	 * @param string $options['order']			deprecated parameter (for now)
-	 *
-	 * @return array
-	 */
-	public function get($options = []) {
-		$result = [];
-		$user_data = self::$userData;
-
-		$sql_parts = [
-			'select'	=> ['screens' => 's.screenid'],
-			'from'		=> ['screens' => 'screens s'],
-			'where'		=> [],
-			'order'		=> [],
-			'group'		=> [],
-			'limit'		=> null
-		];
-
-		$defOptions = [
-			'screenids'					=> null,
-			'userids'					=> null,
-			'screenitemids'				=> null,
-			'editable'					=> false,
-			'nopermissions'				=> null,
-			// filter
-			'filter'					=> null,
-			'search'					=> null,
-			'searchByAny'				=> null,
-			'startSearch'				=> false,
-			'excludeSearch'				=> false,
-			'searchWildcardsEnabled'	=> null,
-			// output
-			'output'					=> API_OUTPUT_EXTEND,
-			'selectScreenItems'			=> null,
-			'selectUsers'				=> null,
-			'selectUserGroups'			=> null,
-			'countOutput'				=> false,
-			'groupCount'				=> false,
-			'preservekeys'				=> false,
-			'sortfield'					=> '',
-			'sortorder'					=> '',
-			'limit'						=> null
-		];
-		$options = zbx_array_merge($defOptions, $options);
-
-		if ($options['countOutput']) {
-			$count_output = true;
-			$options['output'] = ['screenid'];
-			$options['countOutput'] = false;
-			$options['limit'] = null;
-		}
-		else {
-			$count_output = false;
-		}
-
-		// Editable + permission check.
-		if ($user_data['type'] != USER_TYPE_SUPER_ADMIN && $user_data['type'] != USER_TYPE_ZABBIX_ADMIN
-				&& !$options['nopermissions']) {
-			$public_screens = '';
-
-			if ($options['editable']) {
-				$permission = PERM_READ_WRITE;
-			}
-			else {
-				$permission = PERM_READ;
-				$public_screens = ' OR s.private='.PUBLIC_SHARING;
-			}
-
-			$user_groups = getUserGroupsByUserId($user_data['userid']);
-
-			$sql_parts['where'][] = '(EXISTS ('.
-					'SELECT NULL'.
-					' FROM screen_user su'.
-					' WHERE s.screenid=su.screenid'.
-						' AND su.userid='.$user_data['userid'].
-						' AND su.permission>='.$permission.
-				')'.
-				' OR EXISTS ('.
-					'SELECT NULL'.
-					' FROM screen_usrgrp sg'.
-					' WHERE s.screenid=sg.screenid'.
-						' AND '.dbConditionInt('sg.usrgrpid', $user_groups).
-						' AND sg.permission>='.$permission.
-				')'.
-				' OR s.userid='.$user_data['userid'].
-				$public_screens.
-			')';
-		}
-
-		// screenids
-		if (!is_null($options['screenids'])) {
-			zbx_value2array($options['screenids']);
-			$sql_parts['where'][] = dbConditionInt('s.screenid', $options['screenids']);
-		}
-
-		// userids
-		if ($options['userids'] !== null) {
-			zbx_value2array($options['userids']);
-
-			$sql_parts['where'][] = dbConditionInt('s.userid', $options['userids']);
-		}
-
-		// screenitemids
-		if (!is_null($options['screenitemids'])) {
-			zbx_value2array($options['screenitemids']);
-
-			$sql_parts['from']['screens_items'] = 'screens_items si';
-			$sql_parts['where']['ssi'] = 'si.screenid=s.screenid';
-			$sql_parts['where'][] = dbConditionInt('si.screenitemid', $options['screenitemids']);
-		}
-
-		// filter
-		if (is_array($options['filter'])) {
-			$this->dbFilter('screens s', $options, $sql_parts);
-		}
-
-		// search
-		if (is_array($options['search'])) {
-			zbx_db_search('screens s', $options, $sql_parts);
-		}
-
-		// limit
-		if (zbx_ctype_digit($options['limit']) && $options['limit']) {
-			$sql_parts['limit'] = $options['limit'];
-		}
-
-		$screenids = [];
-		$sql_parts = $this->applyQueryOutputOptions($this->tableName(), $this->tableAlias(), $options, $sql_parts);
-		$sql_parts = $this->applyQuerySortOptions($this->tableName(), $this->tableAlias(), $options, $sql_parts);
-		$res = DBselect(self::createSelectQueryFromParts($sql_parts), $sql_parts['limit']);
-		while ($screen = DBfetch($res)) {
-			$screenids[$screen['screenid']] = true;
-			$result[$screen['screenid']] = $screen;
-		}
-
-		// editable + PERMISSION CHECK
-		if ($user_data['type'] != USER_TYPE_SUPER_ADMIN && !$options['nopermissions'] && $screenids) {
-			$db_screen_items = DBselect(
-				'SELECT si.screenid,si.resourcetype,si.resourceid,si.style'.
-				' FROM screens_items si'.
-				' WHERE '.dbConditionInt('si.screenid', array_keys($screenids)).
-					' AND '.dbConditionInt('si.resourcetype', [
-						SCREEN_RESOURCE_HOST_INFO, SCREEN_RESOURCE_TRIGGER_INFO, SCREEN_RESOURCE_TRIGGER_OVERVIEW,
-						SCREEN_RESOURCE_DATA_OVERVIEW, SCREEN_RESOURCE_HOSTGROUP_TRIGGERS,
-						SCREEN_RESOURCE_HOST_TRIGGERS, SCREEN_RESOURCE_GRAPH, SCREEN_RESOURCE_SIMPLE_GRAPH,
-						SCREEN_RESOURCE_PLAIN_TEXT, SCREEN_RESOURCE_CLOCK, SCREEN_RESOURCE_MAP
-					]).
-					' AND si.resourceid<>0'
-			);
-
-			$screens = [];
-
-			while ($db_screen_item = DBfetch($db_screen_items)) {
-				if (!array_key_exists($db_screen_item['screenid'], $screens)) {
-					$screens[$db_screen_item['screenid']] = [
-						'groups' => [], 'hosts' => [], 'graphs' => [], 'items' => [], 'maps' => []
-					];
-				}
-
-				switch ($db_screen_item['resourcetype']) {
-					case SCREEN_RESOURCE_HOST_INFO:
-					case SCREEN_RESOURCE_TRIGGER_INFO:
-					case SCREEN_RESOURCE_TRIGGER_OVERVIEW:
-					case SCREEN_RESOURCE_DATA_OVERVIEW:
-					case SCREEN_RESOURCE_HOSTGROUP_TRIGGERS:
-						$screens[$db_screen_item['screenid']]['groups'][$db_screen_item['resourceid']] = true;
-						break;
-
-					case SCREEN_RESOURCE_HOST_TRIGGERS:
-						$screens[$db_screen_item['screenid']]['hosts'][$db_screen_item['resourceid']] = true;
-						break;
-
-					case SCREEN_RESOURCE_GRAPH:
-						$screens[$db_screen_item['screenid']]['graphs'][$db_screen_item['resourceid']] = true;
-						break;
-
-					case SCREEN_RESOURCE_SIMPLE_GRAPH:
-					case SCREEN_RESOURCE_PLAIN_TEXT:
-						$screens[$db_screen_item['screenid']]['items'][$db_screen_item['resourceid']] = true;
-						break;
-
-					case SCREEN_RESOURCE_CLOCK:
-						if ($db_screen_item['style'] == TIME_TYPE_HOST) {
-							$screens[$db_screen_item['screenid']]['items'][$db_screen_item['resourceid']] = true;
-						}
-						break;
-
-					case SCREEN_RESOURCE_MAP:
-						$screens[$db_screen_item['screenid']]['maps'][$db_screen_item['resourceid']] = true;
-						break;
-				}
-			}
-
-			// groups
-			$groups = [];
-
-			foreach ($screens as $screenid => $resources) {
-				foreach ($resources['groups'] as $groupid => $foo) {
-					$groups[$groupid][$screenid] = true;
-				}
-			}
-
-			if ($groups) {
-				$db_groups = API::HostGroup()->get([
-					'output' => [],
-					'groupids' => array_keys($groups),
-					'preservekeys' => true
-				]);
-
-				foreach ($groups as $groupid => $resources) {
-					if (!array_key_exists($groupid, $db_groups)) {
-						foreach ($resources as $screenid => $foo) {
-							unset($screens[$screenid], $result[$screenid]);
-						}
-					}
-				}
-			}
-
-			// hosts
-			$hosts = [];
-
-			foreach ($screens as $screenid => $resources) {
-				foreach ($resources['hosts'] as $hostid => $foo) {
-					$hosts[$hostid][$screenid] = true;
-				}
-			}
-
-			if ($hosts) {
-				$db_hosts = API::Host()->get([
-					'output' => [],
-					'hostids' => array_keys($hosts),
-					'preservekeys' => true
-				]);
-
-				foreach ($hosts as $hostid => $resources) {
-					if (!array_key_exists($hostid, $db_hosts)) {
-						foreach ($resources as $screenid => $foo) {
-							unset($screens[$screenid], $result[$screenid]);
-						}
-					}
-				}
-			}
-
-			// graphs
-			$graphs = [];
-
-			foreach ($screens as $screenid => $resources) {
-				foreach ($resources['graphs'] as $graphid => $foo) {
-					$graphs[$graphid][$screenid] = true;
-				}
-			}
-
-			if ($graphs) {
-				$db_graphs = API::Graph()->get([
-					'output' => [],
-					'graphids' => array_keys($graphs),
-					'preservekeys' => true
-				]);
-
-				foreach ($graphs as $graphid => $resources) {
-					if (!array_key_exists($graphid, $db_graphs)) {
-						foreach ($resources as $screenid => $foo) {
-							unset($screens[$screenid], $result[$screenid]);
-						}
-					}
-				}
-			}
-
-			// items
-			$items = [];
-
-			foreach ($screens as $screenid => $resources) {
-				foreach ($resources['items'] as $itemid => $foo) {
-					$items[$itemid][$screenid] = true;
-				}
-			}
-
-			if ($items) {
-				$db_items = API::Item()->get([
-					'output' => [],
-					'itemids' => array_keys($items),
-					'webitems' => true,
-					'preservekeys' => true
-				]);
-
-				foreach ($items as $itemid => $resources) {
-					if (!array_key_exists($itemid, $db_items)) {
-						foreach ($resources as $screenid => $foo) {
-							unset($screens[$screenid], $result[$screenid]);
-						}
-					}
-				}
-			}
-
-			// maps
-			$maps = [];
-
-			foreach ($screens as $screenid => $resources) {
-				foreach ($resources['maps'] as $sysmapid => $foo) {
-					$maps[$sysmapid][$screenid] = true;
-				}
-			}
-
-			if ($maps) {
-				$db_maps = API::Map()->get([
-					'output' => [],
-					'sysmapids' => array_keys($maps),
-					'preservekeys' => true
-				]);
-
-				foreach ($maps as $sysmapid => $resources) {
-					if (!array_key_exists($sysmapid, $db_maps)) {
-						foreach ($resources as $screenid => $foo) {
-							unset($screens[$screenid], $result[$screenid]);
-						}
-					}
-				}
-			}
-		}
-
-		if ($count_output) {
-			if ($options['groupCount']) {
-				return [['rowscount' => count($result)]];
-			}
-
-			return (string) count($result);
-		}
-
-		if ($result) {
-			$result = $this->addRelatedObjects($options, $result);
-		}
-
-		// removing keys (hash -> array)
-		if (!$options['preservekeys']) {
-			$result = zbx_cleanHashes($result);
-		}
-
-		return $result;
-	}
-
-	/**
-	 * Validate vsize and hsize parameters.
-	 *
-	 * @param array $screen
-	 *
-	 * @throws APIException if the input is invalid.
-	 */
-	protected function validateScreenSize(array $screen) {
-		foreach (['vsize', 'hsize'] as $field_name) {
-			if (!array_key_exists($field_name, $screen)) {
-				continue;
-			}
-
-			if (!zbx_is_int($screen[$field_name])) {
-				self::exception(ZBX_API_ERROR_PERMISSIONS,
-					_s('Incorrect value for field "%1$s": %2$s.', $field_name, _('a numeric value is expected'))
-				);
-			}
-
-			if ($screen[$field_name] < SCREEN_MIN_SIZE || $screen[$field_name] > SCREEN_MAX_SIZE) {
-				self::exception(ZBX_API_ERROR_PERMISSIONS,
-					_s('Incorrect value for field "%1$s": %2$s.', $field_name,
-						_s('must be between "%1$s" and "%2$s"', SCREEN_MIN_SIZE, SCREEN_MAX_SIZE)
-					)
-				);
-			}
-		}
-	}
-
-	/**
-	 * Validates the input parameters for the create() method.
-	 *
-	 * @param array $screens
-	 *
-	 * @throws APIException if the input is invalid.
-	 */
-	protected function validateCreate(array $screens) {
-		if (!$screens) {
-			self::exception(ZBX_API_ERROR_PARAMETERS, _('Empty input parameter.'));
-		}
-
-		$user_data = self::$userData;
-
-		$screen_db_fields = ['name' => null];
-
-		foreach ($screens as &$screen) {
-			if (!check_db_fields($screen_db_fields, $screen)) {
-				self::exception(ZBX_API_ERROR_PARAMETERS, _('Incorrect input parameters.'));
-			}
-
-			$this->validateScreenSize($screen);
-
-			unset($screen['screenid']);
-		}
-		unset($screen);
-
-		// Check for duplicate names.
-		$duplicate = CArrayHelper::findDuplicate($screens, 'name');
-		if ($duplicate) {
-			self::exception(ZBX_API_ERROR_PARAMETERS,
-				_s('Duplicate "name" value "%1$s" for screen.', $duplicate['name'])
-			);
-		}
-
-		// Check if screen already exists.
-		$db_screens = $this->get([
-			'output' => ['name'],
-			'filter' => ['name' => zbx_objectValues($screens, 'name')],
-			'nopermissions' => true,
-			'limit' => 1
-		]);
-
-		if ($db_screens) {
-			self::exception(ZBX_API_ERROR_PARAMETERS, _s('Screen "%1$s" already exists.', $db_screens[0]['name']));
-		}
-
-		$private_validator = new CLimitedSetValidator([
-			'values' => [PUBLIC_SHARING, PRIVATE_SHARING]
-		]);
-
-		$permission_validator = new CLimitedSetValidator([
-			'values' => [PERM_READ, PERM_READ_WRITE]
-		]);
-
-		foreach ($screens as $screen) {
-			// Check if owner can be set.
-			if (array_key_exists('userid', $screen)) {
-				if ($screen['userid'] === '' || $screen['userid'] === null || $screen['userid'] === false) {
-					self::exception(ZBX_API_ERROR_PARAMETERS, _('Screen owner cannot be empty.'));
-				}
-				elseif ($screen['userid'] != $user_data['userid'] && $user_data['type'] != USER_TYPE_SUPER_ADMIN
-						&& $user_data['type'] != USER_TYPE_ZABBIX_ADMIN) {
-					self::exception(ZBX_API_ERROR_PARAMETERS, _('Only administrators can set screen owner.'));
-				}
-			}
-
-			// Check for invalid "private" values.
-			if (array_key_exists('private', $screen)) {
-				if (!$private_validator->validate($screen['private'])) {
-					self::exception(ZBX_API_ERROR_PARAMETERS,
-						_s('Incorrect "private" value "%1$s" for screen "%2$s".', $screen['private'], $screen['name'])
-					);
-				}
-			}
-
-			$userids = [];
-
-			// Screen user shares.
-			if (array_key_exists('users', $screen)) {
-				if (!is_array($screen['users'])) {
-					self::exception(ZBX_API_ERROR_PARAMETERS, _('Incorrect arguments passed to function.'));
-				}
-
-				$required_fields = ['userid', 'permission'];
-
-				foreach ($screen['users'] as $share) {
-					// Check required parameters.
-					$missing_keys = array_diff($required_fields, array_keys($share));
-
-					if ($missing_keys) {
-						self::exception(ZBX_API_ERROR_PARAMETERS, _s(
-							'User sharing is missing parameters: %1$s for screen "%2$s".',
-							implode(', ', $missing_keys),
-							$screen['name']
-						));
-					}
-					else {
-						foreach ($required_fields as $field) {
-							if ($share[$field] === '' || $share[$field] === null) {
-								self::exception(ZBX_API_ERROR_PARAMETERS, _s(
-									'Sharing option "%1$s" is missing a value for screen "%2$s".',
-									$field,
-									$screen['name']
-								));
-							}
-						}
-					}
-
-					if (!$permission_validator->validate($share['permission'])) {
-						self::exception(ZBX_API_ERROR_PARAMETERS, _s(
-							'Incorrect "permission" value "%1$s" in users for screen "%2$s".',
-							$share['permission'],
-							$screen['name']
-						));
-					}
-
-					if (array_key_exists('private', $screen) && $screen['private'] == PUBLIC_SHARING
-							&& $share['permission'] == PERM_READ) {
-						self::exception(ZBX_API_ERROR_PARAMETERS,
-							_s('Screen "%1$s" is public and read-only sharing is disallowed.', $screen['name'])
-						);
-					}
-
-					if (array_key_exists($share['userid'], $userids)) {
-						self::exception(ZBX_API_ERROR_PARAMETERS,
-							_s('Duplicate userid "%1$s" in users for screen "%2$s".', $share['userid'], $screen['name'])
-						);
-					}
-
-					$userids[$share['userid']] = $share['userid'];
-				}
-			}
-
-			if (array_key_exists('userid', $screen) && $screen['userid']) {
-				$userids[$screen['userid']] = $screen['userid'];
-			}
-
-			// Users validation.
-			if ($userids) {
-				$db_users = API::User()->get([
-					'userids' => $userids,
-					'countOutput' => true
-				]);
-
-				if (count($userids) != $db_users) {
-					self::exception(ZBX_API_ERROR_PARAMETERS,
-						_s('Incorrect user ID specified for screen "%1$s".', $screen['name'])
-					);
-				}
-			}
-
-			// Screen user group shares.
-			if (array_key_exists('userGroups', $screen)) {
-				if (!is_array($screen['userGroups'])) {
-					self::exception(ZBX_API_ERROR_PARAMETERS, _('Incorrect arguments passed to function.'));
-				}
-
-				$shared_user_groupids = [];
-				$required_fields = ['usrgrpid', 'permission'];
-
-				foreach ($screen['userGroups'] as $share) {
-					// Check required parameters.
-					$missing_keys = array_diff($required_fields, array_keys($share));
-
-					if ($missing_keys) {
-						self::exception(ZBX_API_ERROR_PARAMETERS, _s(
-							'User group sharing is missing parameters: %1$s for screen "%2$s".',
-							implode(', ', $missing_keys),
-							$screen['name']
-						));
-					}
-					else {
-						foreach ($required_fields as $field) {
-							if ($share[$field] === '' || $share[$field] === null) {
-								self::exception(ZBX_API_ERROR_PARAMETERS, _s(
-									'Field "%1$s" is missing a value for screen "%2$s".',
-									$field,
-									$screen['name']
-								));
-							}
-						}
-					}
-
-					if (!$permission_validator->validate($share['permission'])) {
-						self::exception(ZBX_API_ERROR_PARAMETERS, _s(
-							'Incorrect "permission" value "%1$s" in user groups for screen "%2$s".',
-							$share['permission'],
-							$screen['name']
-						));
-					}
-
-					if (array_key_exists('private', $screen) && $screen['private'] == PUBLIC_SHARING
-							&& $share['permission'] == PERM_READ) {
-						self::exception(ZBX_API_ERROR_PARAMETERS,
-							_s('Screen "%1$s" is public and read-only sharing is disallowed.', $screen['name'])
-						);
-					}
-
-					if (array_key_exists($share['usrgrpid'], $shared_user_groupids)) {
-						self::exception(ZBX_API_ERROR_PARAMETERS, _s(
-							'Duplicate usrgrpid "%1$s" in user groups for screen "%2$s".',
-							$share['usrgrpid'],
-							$screen['name']
-						));
-					}
-
-					$shared_user_groupids[$share['usrgrpid']] = $share['usrgrpid'];
-				}
-
-				if ($shared_user_groupids) {
-					$db_user_groups = API::UserGroup()->get([
-						'usrgrpids' => $shared_user_groupids,
-						'countOutput' => true
-					]);
-
-					if (count($shared_user_groupids) != $db_user_groups) {
-						self::exception(ZBX_API_ERROR_PARAMETERS,
-							_s('Incorrect user group ID specified for screen "%1$s".', $screen['name'])
-						);
-					}
-				}
-
-				unset($shared_user_groupids);
-			}
-		}
-	}
-
-	/**
-	 * Create screen.
-	 *
-	 * @param array $screens
-	 *
-	 * @return array
-	 */
-	public function create(array $screens) {
-		$screens = zbx_toArray($screens);
-
-		$this->validateCreate($screens);
-
-		foreach ($screens as &$screen) {
-			$screen['userid'] = array_key_exists('userid', $screen) ? $screen['userid'] : self::$userData['userid'];
-		}
-		unset($screen);
-
-		$screenids = DB::insert('screens', $screens);
-
-		$shared_users = [];
-		$shared_user_groups = [];
-		$screenItems = [];
-
-		foreach ($screens as $key => $screen) {
-			// Screen user shares.
-			if (array_key_exists('users', $screen)) {
-				foreach ($screen['users'] as $user) {
-					$shared_users[] = [
-						'screenid' => $screenids[$key],
-						'userid' => $user['userid'],
-						'permission' => $user['permission']
-					];
-				}
-			}
-
-			// Screen user group shares.
-			if (array_key_exists('userGroups', $screen)) {
-				foreach ($screen['userGroups'] as $user_group) {
-					$shared_user_groups[] = [
-						'screenid' => $screenids[$key],
-						'usrgrpid' => $user_group['usrgrpid'],
-						'permission' => $user_group['permission']
-					];
-				}
-			}
-
-			// Create screen items.
-			if (array_key_exists('screenitems', $screen)) {
-				foreach ($screen['screenitems'] as $screenItem) {
-					$screenItem['screenid'] = $screenids[$key];
-
-					$screenItems[] = $screenItem;
-				}
-			}
-		}
-
-		DB::insert('screen_user', $shared_users);
-		DB::insert('screen_usrgrp', $shared_user_groups);
-
-		if ($screenItems) {
-			API::ScreenItem()->create($screenItems);
-		}
-
-
-		return ['screenids' => $screenids];
-	}
-
-	/**
-	 * Validates the input parameters for the update() method.
-	 *
-	 * @param array $screens
-	 * @param array $db_screens		array of existing screens with screen IDs as keys.
-	 *
-	 * @throws APIException if the input is invalid.
-	 */
-	protected function validateUpdate(array $screens, array $db_screens) {
-		if (!$screens) {
-			self::exception(ZBX_API_ERROR_PARAMETERS, _('Empty input parameter.'));
-		}
-
-		$user_data = self::$userData;
-
-		// Validate given IDs.
-		$this->checkObjectIds($screens, 'screenid',
-			_('No "%1$s" given for screen.'),
-			_('Empty screen ID.'),
-			_('Incorrect screen ID.')
-		);
-
-		$check_names = [];
-
-		foreach ($screens as $screen) {
-			$this->validateScreenSize($screen);
-
-			if (!array_key_exists($screen['screenid'], $db_screens)) {
-				self::exception(ZBX_API_ERROR_PERMISSIONS,
-					_('No permissions to referred object or it does not exist!')
-				);
-			}
-		}
-
-		$screens = $this->extendFromObjects(zbx_toHash($screens, 'screenid'), $db_screens, ['name']);
-
-		foreach ($screens as $screen) {
-			if (array_key_exists('name', $screen)) {
-				// Validate "name" field.
-				if (array_key_exists('name', $screen)) {
-					if (is_array($screen['name'])) {
-						self::exception(ZBX_API_ERROR_PARAMETERS, _('Incorrect arguments passed to function.'));
-					}
-					elseif ($screen['name'] === '' || $screen['name'] === null || $screen['name'] === false) {
-						self::exception(ZBX_API_ERROR_PARAMETERS, _('Screen name cannot be empty.'));
-					}
-
-					if ($db_screens[$screen['screenid']]['name'] !== $screen['name']) {
-						$check_names[] = $screen;
-					}
-				}
-			}
-		}
-
-		if ($check_names) {
-			// Check for duplicate names.
-			$duplicate = CArrayHelper::findDuplicate($check_names, 'name');
-			if ($duplicate) {
-				self::exception(ZBX_API_ERROR_PARAMETERS,
-					_s('Duplicate "name" value "%1$s" for screen.', $duplicate['name'])
-				);
-			}
-
-			$db_screen_names = $this->get([
-				'output' => ['screenid', 'name'],
-				'filter' => ['name' => zbx_objectValues($check_names, 'name')],
-				'nopermissions' => true
-			]);
-			$db_screen_names = zbx_toHash($db_screen_names, 'name');
-
-			// Check for existing names.
-			foreach ($check_names as $screen) {
-				if (array_key_exists($screen['name'], $db_screen_names)
-						&& bccomp($db_screen_names[$screen['name']]['screenid'], $screen['screenid']) != 0) {
-					self::exception(ZBX_API_ERROR_PARAMETERS,
-						_s('Screen "%1$s" already exists.', $screen['name'])
-					);
-				}
-			}
-		}
-
-		$private_validator = new CLimitedSetValidator([
-			'values' => [PUBLIC_SHARING, PRIVATE_SHARING]
-		]);
-
-		$permission_validator = new CLimitedSetValidator([
-			'values' => [PERM_READ, PERM_READ_WRITE]
-		]);
-
-		foreach ($screens as $screen) {
-			// Check if owner can be set.
-			if (array_key_exists('userid', $screen)) {
-				if ($screen['userid'] === '' || $screen['userid'] === null || $screen['userid'] === false) {
-					self::exception(ZBX_API_ERROR_PARAMETERS, _('Screen owner cannot be empty.'));
-				}
-				elseif ($screen['userid'] != $user_data['userid'] && $user_data['type'] != USER_TYPE_SUPER_ADMIN
-						&& $user_data['type'] != USER_TYPE_ZABBIX_ADMIN) {
-					self::exception(ZBX_API_ERROR_PARAMETERS, _('Only administrators can set screen owner.'));
-				}
-			}
-
-			// Unset extra field.
-			unset($db_screens[$screen['screenid']]['userid']);
-
-			$screen = array_merge($db_screens[$screen['screenid']], $screen);
-
-			if (!$private_validator->validate($screen['private'])) {
-				self::exception(ZBX_API_ERROR_PARAMETERS,
-					_s('Incorrect "private" value "%1$s" for screen "%2$s".', $screen['private'], $screen['name'])
-				);
-			}
-
-			$userids = [];
-
-			// Screen user shares.
-			if (array_key_exists('users', $screen)) {
-				if (!is_array($screen['users'])) {
-					self::exception(ZBX_API_ERROR_PARAMETERS, _('Incorrect arguments passed to function.'));
-				}
-
-				$required_fields = ['userid', 'permission'];
-
-				foreach ($screen['users'] as $share) {
-					// Check required parameters.
-					$missing_keys = array_diff($required_fields, array_keys($share));
-
-					if ($missing_keys) {
-						self::exception(ZBX_API_ERROR_PARAMETERS, _s(
-							'User sharing is missing parameters: %1$s for screen "%2$s".',
-							implode(', ', $missing_keys),
-							$screen['name']
-						));
-					}
-					else {
-						foreach ($required_fields as $field) {
-							if ($share[$field] === '' || $share[$field] === null) {
-								self::exception(ZBX_API_ERROR_PARAMETERS, _s(
-									'Sharing option "%1$s" is missing a value for screen "%2$s".',
-									$field,
-									$screen['name']
-								));
-							}
-						}
-					}
-
-					if (!$permission_validator->validate($share['permission'])) {
-						self::exception(ZBX_API_ERROR_PARAMETERS, _s(
-							'Incorrect "permission" value "%1$s" in users for screen "%2$s".',
-							$share['permission'],
-							$screen['name']
-						));
-					}
-
-					if ($screen['private'] == PUBLIC_SHARING && $share['permission'] == PERM_READ) {
-						self::exception(ZBX_API_ERROR_PARAMETERS,
-							_s('Screen "%1$s" is public and read-only sharing is disallowed.', $screen['name'])
-						);
-					}
-
-					if (array_key_exists($share['userid'], $userids)) {
-						self::exception(ZBX_API_ERROR_PARAMETERS,
-							_s('Duplicate userid "%1$s" in users for screen "%2$s".', $share['userid'], $screen['name'])
-						);
-					}
-
-					$userids[$share['userid']] = $share['userid'];
-				}
-			}
-
-			if (array_key_exists('userid', $screen) && $screen['userid']) {
-				$userids[$screen['userid']] = $screen['userid'];
-			}
-
-			// Users validation.
-			if ($userids) {
-				$db_users = API::User()->get([
-					'userids' => $userids,
-					'countOutput' => true
-				]);
-
-				if (count($userids) != $db_users) {
-					self::exception(ZBX_API_ERROR_PARAMETERS,
-						_s('Incorrect user ID specified for screen "%1$s".', $screen['name'])
-					);
-				}
-			}
-
-			// Screen user group shares.
-			if (array_key_exists('userGroups', $screen)) {
-				if (!is_array($screen['userGroups'])) {
-					self::exception(ZBX_API_ERROR_PARAMETERS, _('Incorrect arguments passed to function.'));
-				}
-
-				$shared_user_groupids = [];
-				$required_fields = ['usrgrpid', 'permission'];
-
-				foreach ($screen['userGroups'] as $share) {
-					// Check required parameters.
-					$missing_keys = array_diff($required_fields, array_keys($share));
-
-					if ($missing_keys) {
-						self::exception(ZBX_API_ERROR_PARAMETERS, _s(
-							'User group sharing is missing parameters: %1$s for screen "%2$s".',
-							implode(', ', $missing_keys),
-							$screen['name'])
-						);
-					}
-					else {
-						foreach ($required_fields as $field) {
-							if ($share[$field] === '' || $share[$field] === null) {
-								self::exception(ZBX_API_ERROR_PARAMETERS, _s(
-									'Sharing option "%1$s" is missing a value for screen "%2$s".',
-									$field,
-									$screen['name']
-								));
-							}
-						}
-					}
-
-					if (!$permission_validator->validate($share['permission'])) {
-						self::exception(ZBX_API_ERROR_PARAMETERS, _s(
-							'Incorrect "permission" value "%1$s" in user groups for screen "%2$s".',
-							$share['permission'],
-							$screen['name']
-						));
-					}
-
-					if ($screen['private'] == PUBLIC_SHARING && $share['permission'] == PERM_READ) {
-						self::exception(ZBX_API_ERROR_PARAMETERS,
-							_s('Screen "%1$s" is public and read-only sharing is disallowed.', $screen['name'])
-						);
-					}
-
-					if (array_key_exists($share['usrgrpid'], $shared_user_groupids)) {
-						self::exception(ZBX_API_ERROR_PARAMETERS, _s(
-							'Duplicate usrgrpid "%1$s" in user groups for screen "%2$s".',
-							$share['usrgrpid'],
-							$screen['name']
-						));
-					}
-
-					$shared_user_groupids[$share['usrgrpid']] = $share['usrgrpid'];
-				}
-
-				if ($shared_user_groupids) {
-					$db_user_groups = API::UserGroup()->get([
-						'usrgrpids' => $shared_user_groupids,
-						'countOutput' => true
-					]);
-
-					if (count($shared_user_groupids) != $db_user_groups) {
-						self::exception(ZBX_API_ERROR_PARAMETERS,
-							_s('Incorrect user group ID specified for screen "%1$s".', $screen['name'])
-						);
-					}
-				}
-
-				unset($shared_user_groupids);
-			}
-		}
-	}
-
-	/**
-	 * Update screen.
-	 *
-	 * @param array $screens
-	 *
-	 * @return array
-	 */
-	public function update(array $screens) {
-		$screens = zbx_toArray($screens);
-
-		// check screen IDs before doing anything
-		$this->checkObjectIds($screens, 'screenid',
-			_('No "%1$s" given for screen.'),
-			_('Empty screen ID for screen.'),
-			_('Incorrect screen ID.')
-		);
-
-		$db_screens = $this->get([
-			'output' => ['name', 'screenid', 'hsize', 'vsize', 'private'],
-			'selectScreenItems' => ['screenitemid', 'x', 'y', 'colspan', 'rowspan'],
-			'selectUsers' => ['screenuserid', 'screenid', 'userid', 'permission'],
-			'selectUserGroups' => ['screenusrgrpid', 'screenid', 'usrgrpid', 'permission'],
-			'screenids' => zbx_objectValues($screens, 'screenid'),
-			'editable' => true,
-			'preservekeys' => true
-		]);
-
-		$this->validateUpdate($screens, $db_screens);
-		$this->updateReal($screens, $db_screens);
-		$this->truncateScreenItems($screens, $db_screens);
-
-		return ['screenids' => zbx_objectValues($screens, 'screenid')];
-	}
-
-	/**
-	 * Saves screens and screen data.
-	 *
-	 * @param array $screens
-	 * @param array $db_screens	array of existing screens with screen IDs as keys
-	 */
-	protected function updateReal(array $screens, array $db_screens) {
-		$update_screens = [];
-		CArrayHelper::sort($screens, ['screenid']);
-
-		foreach ($screens as $screen) {
-			$screenid = $screen['screenid'];
-			unset($screen['screenid'], $screen['screenitems'], $screen['users'], $screen['userGroups']);
-
-			if ($screen) {
-				$update_screens[] = [
-					'values' => $screen,
-					'where' => ['screenid' => $screenid]
-				];
-			}
-		}
-
-		DB::update('screens', $update_screens);
-
-		$shared_userids_to_delete = [];
-		$shared_users_to_update = [];
-		$shared_users_to_add = [];
-		$shared_user_groupids_to_delete = [];
-		$shared_user_groups_to_update = [];
-		$shared_user_groups_to_add = [];
-
-		foreach ($screens as $screen) {
-			$db_screen = $db_screens[$screen['screenid']];
-
-			// Screen user shares.
-			if (array_key_exists('users', $screen)) {
-				$user_shares_diff = zbx_array_diff($screen['users'], $db_screen['users'], 'userid');
-
-				foreach ($user_shares_diff['both'] as $update_user_share) {
-					$shared_users_to_update[] = [
-						'values' => $update_user_share,
-						'where' => ['userid' => $update_user_share['userid'], 'screenid' => $screen['screenid']]
-					];
-				}
-
-				foreach ($user_shares_diff['first'] as $new_shared_user) {
-					$new_shared_user['screenid'] = $screen['screenid'];
-					$shared_users_to_add[] = $new_shared_user;
-				}
-
-				$shared_userids_to_delete = array_merge($shared_userids_to_delete,
-					zbx_objectValues($user_shares_diff['second'], 'screenuserid')
-				);
-			}
-
-			// Screen user group shares.
-			if (array_key_exists('userGroups', $screen)) {
-				$user_group_shares_diff = zbx_array_diff($screen['userGroups'], $db_screen['userGroups'], 'usrgrpid');
-
-				foreach ($user_group_shares_diff['both'] as $update_user_share) {
-					$shared_user_groups_to_update[] = [
-						'values' => $update_user_share,
-						'where' => ['usrgrpid' => $update_user_share['usrgrpid'], 'screenid' => $screen['screenid']]
-					];
-				}
-
-				foreach ($user_group_shares_diff['first'] as $new_shared_user_group) {
-					$new_shared_user_group['screenid'] = $screen['screenid'];
-					$shared_user_groups_to_add[] = $new_shared_user_group;
-				}
-
-				$shared_user_groupids_to_delete = array_merge($shared_user_groupids_to_delete,
-					zbx_objectValues($user_group_shares_diff['second'], 'screenusrgrpid')
-				);
-			}
-
-			// Replace screen items.
-			if (array_key_exists('screenitems', $screen)) {
-				$this->replaceItems($screen['screenid'], $screen['screenitems']);
-			}
-		}
-
-		// User shares.
-		DB::insert('screen_user', $shared_users_to_add);
-		DB::update('screen_user', $shared_users_to_update);
-
-		if ($shared_userids_to_delete) {
-			DB::delete('screen_user', ['screenuserid' => $shared_userids_to_delete]);
-		}
-
-		// User group shares.
-		DB::insert('screen_usrgrp', $shared_user_groups_to_add);
-		DB::update('screen_usrgrp', $shared_user_groups_to_update);
-
-		if ($shared_user_groupids_to_delete) {
-			DB::delete('screen_usrgrp', ['screenusrgrpid' => $shared_user_groupids_to_delete]);
-		}
-	}
-
-	/**
-	 * Delete or reduce the size of screens items when reducing the size of the screens.
-	 *
-	 * Each array in the $screens array must have the following values:
-	 * - screenid
-	 * - hsize
-	 * - vsize
-	 *
-	 * Each array in the $dbScreens array must have the following values:
-	 * - screenid
-	 * - hsize
-	 * - vsize
-	 * - screenitems
-	 *
-	 * @param array $screens
-	 * @param array $dbScreens	array of existing screens with screen IDs as keys
-	 */
-	protected function truncateScreenItems(array $screens, array $dbScreens) {
-		$deleteScreenItemIds = [];
-		$updateScreenItems = [];
-		foreach ($screens as $screen) {
-			if (array_key_exists('screenitems', $screen)) {
-				continue;
-			}
-
-			$dbScreen = $dbScreens[$screen['screenid']];
-			$dbScreenItems = $dbScreen['screenitems'];
-
-			if (isset($screen['hsize'])) {
-				foreach ($dbScreenItems as $dbScreenItem) {
-					// delete screen items that are located on the deleted columns
-					if ($dbScreenItem['x'] > $screen['hsize'] - 1) {
-						$deleteScreenItemIds[$dbScreenItem['screenitemid']] = $dbScreenItem['screenitemid'];
-					}
-					// reduce the colspan of screenitems that are displayed on the deleted columns
-					elseif (($dbScreenItem['x'] + $dbScreenItem['colspan']) > $screen['hsize']) {
-						$colspan = $screen['hsize'] - $dbScreenItem['x'];
-
-						$screenItemId = $dbScreenItem['screenitemid'];
-						$updateScreenItems[$screenItemId]['screenitemid'] = $dbScreenItem['screenitemid'];
-						$updateScreenItems[$screenItemId]['colspan'] = $colspan;
-					}
-				}
-			}
-
-			if (isset($screen['vsize'])) {
-				foreach ($dbScreenItems as $dbScreenItem) {
-					// delete screen items that are located on the deleted rows
-					if ($dbScreenItem['y'] > $screen['vsize'] - 1) {
-						$deleteScreenItemIds[$dbScreenItem['screenitemid']] = $dbScreenItem['screenitemid'];
-					}
-					// reduce the rowspan of screenitems that are displayed on the deleted rows
-					elseif (($dbScreenItem['y'] + $dbScreenItem['rowspan']) > $screen['vsize']) {
-						$rowspan = $screen['vsize'] - $dbScreenItem['y'];
-
-						$screenItemId = $dbScreenItem['screenitemid'];
-						$updateScreenItems[$screenItemId]['screenitemid'] = $dbScreenItem['screenitemid'];
-						$updateScreenItems[$screenItemId]['rowspan'] = $rowspan;
-					}
-				}
-			}
-		}
-
-		if ($deleteScreenItemIds) {
-			DB::delete('screens_items', ['screenitemid' => $deleteScreenItemIds]);
-		}
-
-		foreach ($updateScreenItems as $screenItem) {
-			DB::updateByPk('screens_items', $screenItem['screenitemid'], $screenItem);
-		}
-	}
-
-	/**
-	 * Validate input for delete method.
-	 *
-	 * @param array $screenids
-	 *
-	 * @throws APIException if the input is invalid.
-	 */
-	protected function validateDelete(array $screenids) {
-		if (!$screenids) {
-			self::exception(ZBX_API_ERROR_PARAMETERS, _('Empty input parameter.'));
-		}
-
-		$db_screens = $this->get([
-			'output' => ['screenid'],
-			'screenids' => $screenids,
-			'editable' => true,
-			'preservekeys' => true
-		]);
-
-		foreach ($screenids as $screenid) {
-			if (!array_key_exists($screenid, $db_screens)) {
-				self::exception(ZBX_API_ERROR_PERMISSIONS,
-					_('No permissions to referred object or it does not exist!')
-				);
-			}
-		}
-	}
-
-	/**
-	 * Delete screen.
-	 *
-	 * @param array $screenids
-	 *
-	 * @return array
-	 */
-	public function delete(array $screenids) {
-		$this->validateDelete($screenids);
-
-		DB::delete('screens_items', ['screenid' => $screenids]);
-		DB::delete('slides', ['screenid' => $screenids]);
-		DB::delete('screens', ['screenid' => $screenids]);
-		DB::delete('profiles', [
-			'idx' => 'web.favorite.screenids',
-			'source' => 'screenid',
-			'value_id' => $screenids
-		]);
-
-		return ['screenids' => $screenids];
-	}
-
-	/**
-	 * Replaces all of the screen items of the given screen.
-	 *
-	 * @param int   $screenId		The ID of the target screen
-	 * @param array $screenItems	An array of screen items
-	 */
-	protected function replaceItems($screenId, $screenItems) {
-		foreach ($screenItems as &$screenItem) {
-			$screenItem['screenid'] = $screenId;
-		}
-		unset($screenItem);
-
-		$createScreenItems = $deleteScreenItems = $updateScreenItems = [];
-		$deleteScreenItemsIds = [];
-
-		$dbScreenItems = API::ScreenItem()->get([
-			'output' => ['screenitemid'],
-			'screenids' => $screenId,
-			'preservekeys' => true
-		]);
-
-		foreach ($screenItems as $screenItem) {
-			if (isset($screenItem['screenitemid']) && isset($dbScreenItems[$screenItem['screenitemid']])) {
-				$updateScreenItems[$screenItem['screenitemid']] = $screenItem;
-			}
-			else {
-				$createScreenItems[] = $screenItem;
-			}
-		}
-
-		foreach ($dbScreenItems as $dbScreenItem) {
-			if (!isset($updateScreenItems[$dbScreenItem['screenitemid']])) {
-				$deleteScreenItemsIds[$dbScreenItem['screenitemid']] = $dbScreenItem['screenitemid'];
-			}
-		}
-
-		if ($deleteScreenItemsIds) {
-			API::ScreenItem()->delete($deleteScreenItemsIds);
-		}
-		if ($updateScreenItems) {
-			API::ScreenItem()->update($updateScreenItems);
-		}
-		if ($createScreenItems) {
-			API::ScreenItem()->create($createScreenItems);
-		}
-	}
-
-	protected function addRelatedObjects(array $options, array $result) {
-		$result = parent::addRelatedObjects($options, $result);
-
-		$screenIds = array_keys($result);
-
-		// adding ScreenItems
-		if ($options['selectScreenItems'] !== null && $options['selectScreenItems'] != API_OUTPUT_COUNT) {
-			$screenItems = API::getApiService()->select('screens_items', [
-				'output' => $this->outputExtend($options['selectScreenItems'], ['screenid', 'screenitemid']),
-				'filter' => ['screenid' => $screenIds],
-				'preservekeys' => true
-			]);
-
-			$relation_map = $this->createRelationMap($screenItems, 'screenid', 'screenitemid');
-
-			$screenItems = $this->unsetExtraFields($screenItems, ['screenid', 'screenitemid'], $options['selectScreenItems']);
-			$result = $relation_map->mapMany($result, $screenItems, 'screenitems');
-		}
-
-		// Adding user shares.
-		if ($options['selectUsers'] !== null && $options['selectUsers'] != API_OUTPUT_COUNT) {
-			$relation_map = $this->createRelationMap($result, 'screenid', 'userid', 'screen_user');
-			// Get all allowed users.
-			$related_users = API::User()->get([
-				'output' => ['userid'],
-				'userids' => $relation_map->getRelatedIds(),
-				'preservekeys' => true
-			]);
-
-			$related_userids = zbx_objectValues($related_users, 'userid');
-
-			if ($related_userids) {
-				$users = API::getApiService()->select('screen_user', [
-					'output' => $this->outputExtend($options['selectUsers'], ['screenid', 'userid']),
-					'filter' => ['screenid' => $screenIds, 'userid' => $related_userids],
-					'preservekeys' => true
-				]);
-
-				$relation_map = $this->createRelationMap($users, 'screenid', 'screenuserid');
-
-				$users = $this->unsetExtraFields($users, ['screenuserid', 'userid', 'permission'],
-					$options['selectUsers']
-				);
-
-				foreach ($users as &$user) {
-					unset($user['screenid']);
-				}
-				unset($user);
-
-				$result = $relation_map->mapMany($result, $users, 'users');
-			}
-			else {
-				foreach ($result as &$row) {
-					$row['users'] = [];
-				}
-				unset($row);
-			}
-		}
-
-		// Adding user group shares.
-		if ($options['selectUserGroups'] !== null && $options['selectUserGroups'] != API_OUTPUT_COUNT) {
-			$relation_map = $this->createRelationMap($result, 'screenid', 'usrgrpid', 'screen_usrgrp');
-			// Get all allowed groups.
-			$related_groups = API::UserGroup()->get([
-				'output' => ['usrgrpid'],
-				'usrgrpids' => $relation_map->getRelatedIds(),
-				'preservekeys' => true
-			]);
-
-			$related_groupids = zbx_objectValues($related_groups, 'usrgrpid');
-
-			if ($related_groupids) {
-				$user_groups = API::getApiService()->select('screen_usrgrp', [
-					'output' => $this->outputExtend($options['selectUserGroups'], ['screenid', 'usrgrpid']),
-					'filter' => ['screenid' => $screenIds, 'usrgrpid' => $related_groupids],
-					'preservekeys' => true
-				]);
-
-				$relation_map = $this->createRelationMap($user_groups, 'screenid', 'screenusrgrpid');
-
-				$user_groups = $this->unsetExtraFields($user_groups, ['screenusrgrpid', 'usrgrpid', 'permission'],
-					$options['selectUserGroups']
-				);
-
-				foreach ($user_groups as &$user_group) {
-					unset($user_group['screenid']);
-				}
-				unset($user_group);
-
-				$result = $relation_map->mapMany($result, $user_groups, 'userGroups');
-			}
-			else {
-				foreach ($result as &$row) {
-					$row['userGroups'] = [];
-				}
-				unset($row);
-			}
-		}
-
-		return $result;
-	}
-}
diff --git a/ui/include/classes/api/services/CScreenItem.php b/ui/include/classes/api/services/CScreenItem.php
deleted file mode 100644
index dec428daf17..00000000000
--- a/ui/include/classes/api/services/CScreenItem.php
+++ /dev/null
@@ -1,933 +0,0 @@
-<?php
-/*
-** Zabbix
-** Copyright (C) 2001-2021 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.
-**/
-
-
-/**
- * Class containing methods for operations with screen items.
- */
-class CScreenItem extends CApiService {
-
-	public const ACCESS_RULES = [
-		'get' => ['min_user_type' => USER_TYPE_ZABBIX_USER],
-		'create' => ['min_user_type' => USER_TYPE_ZABBIX_USER, 'action' => CRoleHelper::ACTIONS_EDIT_DASHBOARDS],
-		'update' => ['min_user_type' => USER_TYPE_ZABBIX_USER, 'action' => CRoleHelper::ACTIONS_EDIT_DASHBOARDS],
-		'delete' => ['min_user_type' => USER_TYPE_ZABBIX_USER, 'action' => CRoleHelper::ACTIONS_EDIT_DASHBOARDS]
-	];
-
-	protected $tableName = 'screens_items';
-	protected $tableAlias = 'si';
-
-	/**
-	 * Supported values for the resourcetype column.
-	 *
-	 * @var array
-	 */
-	protected static $resourceTypes = [
-		SCREEN_RESOURCE_GRAPH,
-		SCREEN_RESOURCE_SIMPLE_GRAPH,
-		SCREEN_RESOURCE_MAP,
-		SCREEN_RESOURCE_PLAIN_TEXT,
-		SCREEN_RESOURCE_HOST_INFO,
-		SCREEN_RESOURCE_TRIGGER_INFO,
-		SCREEN_RESOURCE_SERVER_INFO,
-		SCREEN_RESOURCE_CLOCK,
-		SCREEN_RESOURCE_TRIGGER_OVERVIEW,
-		SCREEN_RESOURCE_DATA_OVERVIEW,
-		SCREEN_RESOURCE_URL,
-		SCREEN_RESOURCE_ACTIONS,
-		SCREEN_RESOURCE_EVENTS,
-		SCREEN_RESOURCE_HOSTGROUP_TRIGGERS,
-		SCREEN_RESOURCE_SYSTEM_STATUS,
-		SCREEN_RESOURCE_HOST_TRIGGERS,
-		SCREEN_RESOURCE_LLD_GRAPH,
-		SCREEN_RESOURCE_LLD_SIMPLE_GRAPH
-	];
-
-	protected $sortColumns = [
-		'screenitemid',
-		'screenid'
-	];
-
-	public function __construct() {
-		parent::__construct();
-
-		$this->getOptions = zbx_array_merge($this->getOptions, [
-			'screenitemids'	=> null,
-			'screenids'		=> null,
-			'editable'		=> false,
-			'sortfield'		=> '',
-			'sortorder'		=> '',
-			'preservekeys'	=> false,
-			'countOutput'	=> false
-		]);
-	}
-
-	/**
-	 * Get screem item data.
-	 *
-	 * @param array $options
-	 * @param array $options['screenitemids']	Search by screen item IDs
-	 * @param array $options['screenids']		Search by screen IDs
-	 * @param array $options['filter']			Result filter
-	 * @param array $options['limit']			The size of the result set
-	 *
-	 * @return array
-	 */
-	public function get(array $options = []) {
-		$options = zbx_array_merge($this->getOptions, $options);
-
-		// build and execute query
-		$sql = $this->createSelectQuery($this->tableName(), $options);
-		$res = DBselect($sql, $options['limit']);
-
-		// fetch results
-		$result = [];
-		while ($row = DBfetch($res)) {
-			// count query, return a single result
-			if ($options['countOutput']) {
-				$result = $row['rowscount'];
-			}
-			// normal select query
-			else {
-				if ($options['preservekeys']) {
-					$result[$row['screenitemid']] = $row;
-				}
-				else {
-					$result[] = $row;
-				}
-			}
-		}
-
-		return $result;
-	}
-
-	/**
-	 * Create screen items.
-	 *
-	 * @param array $screenItems	An array of screen items
-	 *
-	 * @return array
-	 */
-	public function create(array $screenItems) {
-		$screenItems = zbx_toArray($screenItems);
-
-		$this->validateCreate($screenItems);
-
-		$screenItemIds = DB::insert($this->tableName(), $screenItems);
-
-		return ['screenitemids' => $screenItemIds];
-	}
-
-	/**
-	 * Validates the input parameters for the create() method.
-	 *
-	 * @throws APIException if the input is invalid
-	 *
-	 * @param array $screenItems
-	 */
-	protected function validateCreate(array $screenItems) {
-		$screenItemDBfields = [
-			'screenid' => null,
-			'resourcetype' => null
-		];
-
-		$defaults = [
-			'x' => 0,
-			'y' => 0,
-			'colspan' => 1,
-			'rowspan' => 1
-		];
-
-		foreach ($screenItems as &$screenItem) {
-			if (!check_db_fields($screenItemDBfields, $screenItem)) {
-				self::exception(ZBX_API_ERROR_PARAMETERS, _('Invalid method parameters.'));
-			}
-
-			unset($screenItem['screenitemid']);
-			$screenItem += $defaults;
-		}
-		unset($screenItem);
-
-		$this->validateItemsURL($screenItems);
-
-		$screenIds = array_keys(array_flip(zbx_objectValues($screenItems, 'screenid')));
-
-		$dbScreens = API::Screen()->get([
-			'output' => ['screenid', 'hsize', 'vsize', 'name'],
-			'screenids' => $screenIds,
-			'editable' => true,
-			'preservekeys' => true
-		]);
-
-		$dbScreenItems = API::getApiService()->select($this->tableName(), [
-			'output' => ['screenitemid', 'screenid', 'x', 'y', 'rowspan', 'colspan'],
-			'filter' => ['screenid' => array_keys($dbScreens)],
-			'preservekeys' => true
-		]);
-
-		$this->checkInput($screenItems, $dbScreenItems);
-		$this->checkDuplicateResourceInCell(array_merge($screenItems, $dbScreenItems), $dbScreens);
-
-		foreach ($screenItems as $screenItem) {
-			$this->checkSpans($screenItem, $dbScreens[$screenItem['screenid']]);
-			$this->checkSpansInBounds($screenItem, $dbScreenItems, $dbScreens[$screenItem['screenid']]);
-			$this->checkGridCoordinates($screenItem, $dbScreens[$screenItem['screenid']]);
-		}
-	}
-
-	/**
-	 * Updates screen items.
-	 *
-	 * @param array $screenItems	An array of screen items
-	 *
-	 * @return array
-	 */
-	public function update(array $screenItems) {
-		$screenItems = zbx_toArray($screenItems);
-
-		$this->validateUpdate($screenItems);
-
-		$screenItems = zbx_toHash($screenItems, 'screenitemid');
-
-		$update = [];
-		$screenItemIds = [];
-
-		foreach ($screenItems as $screenItem) {
-			$screenItemId = $screenItem['screenitemid'];
-			unset($screenItem['screenitemid']);
-
-			// If screen item type (field "resourcetype") is set to one that does not use "resourceid" field,
-			// value of field "resourceid" is set to 0 for those resource types. Clock screen item type has
-			// more refined check.
-			if (isset($screenItem['resourcetype'])) {
-				switch ($screenItem['resourcetype']) {
-					case SCREEN_RESOURCE_CLOCK:
-						if (isset($screenItem['style']) && $screenItem['style'] != TIME_TYPE_HOST) {
-							$screenItem['resourceid'] = 0;
-						}
-						break;
-
-					case SCREEN_RESOURCE_ACTIONS:
-					case SCREEN_RESOURCE_HISTORY:
-					case SCREEN_RESOURCE_SERVER_INFO:
-					case SCREEN_RESOURCE_SYSTEM_STATUS:
-					case SCREEN_RESOURCE_URL:
-						$screenItem['resourceid'] = 0;
-						break;
-				}
-			}
-
-			$update[] = [
-				'values' => $screenItem,
-				'where' => ['screenitemid' => $screenItemId]
-			];
-
-			$screenItemIds[] = $screenItemId;
-		}
-
-		DB::update($this->tableName(), $update);
-
-		return ['screenitemids' => $screenItemIds];
-	}
-
-	/**
-	 * Validates the input parameters for the update() method.
-	 *
-	 * @throws APIException
-	 *
-	 * @param array $screenItems
-	 */
-	protected function validateUpdate(array $screenItems) {
-		$screenItemDBfields = [
-			'screenitemid' => null
-		];
-
-		foreach ($screenItems as $screenItem) {
-			if (!check_db_fields($screenItemDBfields, $screenItem)) {
-				self::exception(ZBX_API_ERROR_PARAMETERS, _('Invalid method parameters.'));
-			}
-		}
-
-		$this->validateItemsURL($screenItems);
-
-		$screenItems = zbx_toHash($screenItems, 'screenitemid');
-		$screenItemIds = array_keys($screenItems);
-
-		$dbScreens = API::Screen()->get([
-			'output' => ['screenid', 'hsize', 'vsize', 'name'],
-			'screenitemids' => $screenItemIds,
-			'editable' => true,
-			'preservekeys' => true
-		]);
-
-		$dbScreenItems = API::getApiService()->select($this->tableName(), [
-			'output' => ['screenitemid', 'screenid', 'x', 'y', 'rowspan', 'colspan', 'resourcetype', 'resourceid',
-				'style'
-			],
-			'filter' => ['screenid' => array_keys($dbScreens)],
-			'preservekeys' => true
-		]);
-
-		$screenItems = $this->extendObjects($this->tableName(), $screenItems,
-			['screenid', 'x', 'y', 'rowspan', 'colspan', 'style']
-		);
-
-		$this->checkInput($screenItems, $dbScreenItems);
-		$this->checkDuplicateResourceInCell($screenItems + $dbScreenItems, $dbScreens);
-
-		foreach ($screenItems as $screenItem) {
-			$this->checkSpans($screenItem, $dbScreens[$screenItem['screenid']]);
-			$this->checkSpansInBounds($screenItem, $dbScreenItems, $dbScreens[$screenItem['screenid']]);
-			$this->checkGridCoordinates($screenItem, $dbScreens[$screenItem['screenid']]);
-		}
-	}
-
-	/**
-	 * Update screen items using the given 'x' and 'y' parameters.
-	 * If the given cell is free, a new screen item will be created.
-	 *
-	 * @param array $screenItems	An array of screen items with the given X and Y coordinates
-	 *
-	 * @return array
-	 */
-	public function updateByPosition(array $screenItems) {
-		$screenItemDBfields = [
-			'screenid' => null,
-			'x' => null,
-			'y' => null
-		];
-
-		foreach ($screenItems as $screenItem) {
-			if (!check_db_fields($screenItemDBfields, $screenItem)) {
-				self::exception(ZBX_API_ERROR_PARAMETERS, _('Invalid method parameters.'));
-			}
-		}
-
-		$dbScreenItems = $this->get([
-			'output' => ['screenitemid', 'screenid', 'x', 'y'],
-			'screenids' => zbx_objectValues($screenItems, 'screenid'),
-			'editable' => true,
-			'preservekeys' => true
-		]);
-
-		$create = $update = $affectedIds = [];
-
-		foreach ($screenItems as $screenItem) {
-			foreach ($dbScreenItems as $dbScreenItem) {
-				if ($screenItem['screenid'] == $dbScreenItem['screenid']
-						&& $screenItem['x'] == $dbScreenItem['x'] && $screenItem['y'] == $dbScreenItem['y']) {
-					$screenItem['screenitemid'] = $dbScreenItem['screenitemid'];
-					$update[$dbScreenItem['screenitemid']] = $screenItem;
-
-					continue 2;
-				}
-			}
-
-			$create[] = $screenItem;
-		}
-
-		if ($update) {
-			$screenItems = API::ScreenItem()->update($update);
-
-			$affectedIds = $screenItems['screenitemids'];
-		}
-
-		if ($create) {
-			$screenItems = API::ScreenItem()->create($create);
-
-			$affectedIds = array_merge($affectedIds, $screenItems['screenitemids']);
-		}
-
-		return ['screenitemids' => $affectedIds];
-	}
-
-	/**
-	 * Deletes screen items.
-	 *
-	 * @param array $screenItemIds
-	 *
-	 * @return array
-	 */
-	public function delete(array $screenItemIds) {
-		// check permissions
-		$dbScreenItems = $this->get([
-			'output' => ['screenitemid'],
-			'screenitemids' => $screenItemIds,
-			'preservekeys' => true
-		]);
-
-		foreach ($screenItemIds as $screenItemId) {
-			if (!isset($dbScreenItems[$screenItemId])) {
-				self::exception(ZBX_API_ERROR_PERMISSIONS, _('No permissions to referred object or it does not exist!'));
-			}
-		}
-
-		// delete screen items
-		DB::delete($this->tableName(), [
-			'screenitemid' => $screenItemIds
-		]);
-
-		return ['screenitemids' => $screenItemIds];
-	}
-
-	/**
-	 * Validates screen items.
-	 *
-	 * If the $dbScreenItems parameter is given, the screen items will be matched
-	 * against the ones given in $dbScreenItems. If a screen item is not present in
-	 * $dbScreenItems, a ZBX_API_ERROR_PERMISSIONS exception will be thrown.
-	 *
-	 * @throws APIException if a validation error occurred.
-	 *
-	 * @param array $screenItems
-	 * @param array $dbScreenItems
-	 */
-	protected function checkInput(array $screenItems, array $dbScreenItems = []) {
-		$hostGroupsIds = [];
-		$hostIds = [];
-		$graphIds = [];
-		$itemIds = [];
-		$mapIds = [];
-		$screenIds = [];
-		$itemPrototypeIds = [];
-		$graphPrototypeIds = [];
-
-		$screenItems = $this->extendFromObjects($screenItems, $dbScreenItems, ['resourcetype']);
-
-		$validStyles = [
-			SCREEN_RESOURCE_CLOCK => [TIME_TYPE_LOCAL, TIME_TYPE_SERVER, TIME_TYPE_HOST],
-			SCREEN_RESOURCE_DATA_OVERVIEW => [STYLE_TOP, STYLE_LEFT],
-			SCREEN_RESOURCE_TRIGGER_OVERVIEW => [STYLE_TOP, STYLE_LEFT],
-			SCREEN_RESOURCE_HOST_INFO => [STYLE_VERTICAL, STYLE_HORIZONTAL],
-			SCREEN_RESOURCE_TRIGGER_INFO => [STYLE_VERTICAL, STYLE_HORIZONTAL]
-		];
-
-		foreach ($screenItems as $screenItem) {
-			// check permissions
-			if (isset($screenItem['screenitemid']) && !isset($dbScreenItems[$screenItem['screenitemid']])) {
-				self::exception(ZBX_API_ERROR_PERMISSIONS, _('No permissions to referred object or it does not exist!'));
-			}
-
-			if (!$this->isValidResourceType($screenItem['resourcetype'])) {
-				self::exception(ZBX_API_ERROR_PARAMETERS, _('Incorrect resource type provided for screen item.'));
-			}
-
-			if (!isset($screenItem['resourceid'])) {
-				$screenItem['resourceid'] = null;
-			}
-
-			// check resource id
-			switch ($screenItem['resourcetype']) {
-				case SCREEN_RESOURCE_HOST_INFO:
-				case SCREEN_RESOURCE_TRIGGER_INFO:
-				case SCREEN_RESOURCE_TRIGGER_OVERVIEW:
-				case SCREEN_RESOURCE_HOSTGROUP_TRIGGERS:
-				case SCREEN_RESOURCE_DATA_OVERVIEW:
-					$overviewResources = [SCREEN_RESOURCE_TRIGGER_OVERVIEW, SCREEN_RESOURCE_DATA_OVERVIEW];
-					if (in_array($screenItem['resourcetype'], $overviewResources)) {
-						if (!$screenItem['resourceid']) {
-							self::exception(ZBX_API_ERROR_PARAMETERS, _(
-								'No host group ID provided for screen element.'
-							));
-						}
-					}
-
-					if ($screenItem['resourceid']) {
-						$hostGroupsIds[$screenItem['resourceid']] = $screenItem['resourceid'];
-					}
-					break;
-
-				case SCREEN_RESOURCE_HOST_TRIGGERS:
-					if ($screenItem['resourceid']) {
-						$hostIds[$screenItem['resourceid']] = $screenItem['resourceid'];
-					}
-					break;
-
-				case SCREEN_RESOURCE_GRAPH:
-					if (!$screenItem['resourceid']) {
-						self::exception(ZBX_API_ERROR_PARAMETERS, _('No graph ID provided for screen element.'));
-					}
-
-					$graphIds[$screenItem['resourceid']] = $screenItem['resourceid'];
-					break;
-
-				case SCREEN_RESOURCE_LLD_GRAPH:
-					if (!$screenItem['resourceid']) {
-						self::exception(ZBX_API_ERROR_PARAMETERS, _(
-							'No graph prototype ID provided for screen element.'
-						));
-					}
-
-					$graphPrototypeIds[$screenItem['resourceid']] = $screenItem['resourceid'];
-					break;
-
-				case SCREEN_RESOURCE_LLD_SIMPLE_GRAPH:
-					if (!$screenItem['resourceid']) {
-						self::exception(ZBX_API_ERROR_PARAMETERS, _(
-							'No item prototype ID provided for screen element.'
-						));
-					}
-
-					$itemPrototypeIds[$screenItem['resourceid']] = $screenItem['resourceid'];
-					break;
-
-				case SCREEN_RESOURCE_SIMPLE_GRAPH:
-				case SCREEN_RESOURCE_PLAIN_TEXT:
-					if (!$screenItem['resourceid']) {
-						self::exception(ZBX_API_ERROR_PARAMETERS, _('No item ID provided for screen element.'));
-					}
-
-					$itemIds[$screenItem['resourceid']] = $screenItem['resourceid'];
-					break;
-
-				case SCREEN_RESOURCE_CLOCK:
-					if (isset($screenItem['style'])) {
-						if ($screenItem['style'] == TIME_TYPE_HOST) {
-							if (!$screenItem['resourceid']) {
-								self::exception(ZBX_API_ERROR_PARAMETERS, _('No item ID provided for screen element.'));
-							}
-
-							$itemIds[$screenItem['resourceid']] = $screenItem['resourceid'];
-						}
-						elseif ($screenItem['resourceid']) {
-							self::exception(ZBX_API_ERROR_PARAMETERS, _('Cannot set resource ID for screen element.'));
-						}
-					}
-					break;
-
-				case SCREEN_RESOURCE_MAP:
-					if (!$screenItem['resourceid']) {
-						self::exception(ZBX_API_ERROR_PARAMETERS, _('No map ID provided for screen element.'));
-					}
-
-					$mapIds[$screenItem['resourceid']] = $screenItem['resourceid'];
-					break;
-
-				case SCREEN_RESOURCE_ACTIONS:
-				case SCREEN_RESOURCE_SERVER_INFO:
-				case SCREEN_RESOURCE_SYSTEM_STATUS:
-				case SCREEN_RESOURCE_URL:
-					if ($screenItem['resourceid']) {
-						self::exception(ZBX_API_ERROR_PARAMETERS, _('Cannot set resource ID for screen element.'));
-					}
-					break;
-			}
-
-			// check url
-			if ($screenItem['resourcetype'] == SCREEN_RESOURCE_URL) {
-				if (!isset($screenItem['url']) || zbx_empty($screenItem['url'])) {
-					self::exception(ZBX_API_ERROR_PARAMETERS, _('No URL provided for screen element.'));
-				}
-			}
-
-			// check "Show lines"
-			if (isset($screenItem['elements'])) {
-				switch ($screenItem['resourcetype']) {
-					case SCREEN_RESOURCE_ACTIONS:
-					case SCREEN_RESOURCE_EVENTS:
-					case SCREEN_RESOURCE_HOSTGROUP_TRIGGERS:
-					case SCREEN_RESOURCE_HOST_TRIGGERS:
-					case SCREEN_RESOURCE_PLAIN_TEXT:
-						if ($screenItem['elements'] < 1 || $screenItem['elements'] > 100) {
-							self::exception(ZBX_API_ERROR_PARAMETERS, _s(
-								'Incorrect value "%1$s" for "%2$s" field: must be between %3$s and %4$s.',
-								$screenItem['elements'], 'elements', 1, 100
-							));
-						}
-						break;
-				}
-			}
-
-			// check 'max_columns' parameter for LLD screen resources:
-			// is set and valid for create method, and is valid for update method, if set
-			$dbScreenItem = isset($screenItem['screenitemid']) ? $dbScreenItems[$screenItem['screenitemid']] : null;
-
-			$lldResources = [SCREEN_RESOURCE_LLD_GRAPH, SCREEN_RESOURCE_LLD_SIMPLE_GRAPH];
-			if (in_array($screenItem['resourcetype'], $lldResources)) {
-				$set = isset($screenItem['max_columns']);
-				$valid = ($set && $this->isValidMaxColumns($screenItem['max_columns']));
-
-				$error = ($dbScreenItem ? ($set && !$valid) : (!$set || !$valid));
-				if ($error) {
-					self::exception(ZBX_API_ERROR_PARAMETERS, _('Incorrect max columns provided for screen element.'));
-				}
-			}
-
-			if (isset($validStyles[$screenItem['resourcetype']])
-					&& !in_array($screenItem['style'], $validStyles[$screenItem['resourcetype']])) {
-				self::exception(ZBX_API_ERROR_PARAMETERS, _('Incorrect style provided for screen element.'));
-			}
-		}
-
-		// check host groups
-		if ($hostGroupsIds) {
-			$dbHostGroups = API::HostGroup()->get([
-				'output' => ['groupid'],
-				'groupids' => $hostGroupsIds,
-				'preservekeys' => true
-			]);
-
-			foreach ($hostGroupsIds as $hostGroupsId) {
-				if (!isset($dbHostGroups[$hostGroupsId])) {
-					self::exception(ZBX_API_ERROR_PERMISSIONS, _s(
-						'Incorrect host group ID "%1$s" provided for screen element.', $hostGroupsId
-					));
-				}
-			}
-		}
-
-		// check hosts
-		if ($hostIds) {
-			$dbHosts = API::Host()->get([
-				'output' => ['hostid'],
-				'hostids' => $hostIds,
-				'preservekeys' => true
-			]);
-
-			foreach ($hostIds as $hostId) {
-				if (!isset($dbHosts[$hostId])) {
-					self::exception(ZBX_API_ERROR_PERMISSIONS, _s(
-						'Incorrect host ID "%1$s" provided for screen element.', $hostId
-					));
-				}
-			}
-		}
-
-		// check graphs
-		if ($graphIds) {
-			$dbGraphs = API::Graph()->get([
-				'output' => ['graphid'],
-				'graphids' => $graphIds,
-				'preservekeys' => true
-			]);
-
-			foreach ($graphIds as $graphId) {
-				if (!isset($dbGraphs[$graphId])) {
-					self::exception(ZBX_API_ERROR_PERMISSIONS, _s(
-						'Incorrect graph ID "%1$s" provided for screen element.', $graphId
-					));
-				}
-			}
-		}
-
-		// check graph prototypes
-		if ($graphPrototypeIds) {
-			$dbGraphPrototypes = API::GraphPrototype()->get([
-				'output' => ['graphid'],
-				'graphids' => $graphPrototypeIds,
-				'preservekeys' => true
-			]);
-
-			foreach ($graphPrototypeIds as $graphPrototypeId) {
-				if (!isset($dbGraphPrototypes[$graphPrototypeId])) {
-					self::exception(ZBX_API_ERROR_PERMISSIONS, _s(
-						'Incorrect graph prototype ID "%1$s" provided for screen element.', $graphPrototypeId
-					));
-				}
-			}
-		}
-
-		// check items
-		if ($itemIds) {
-			$dbItems = API::Item()->get([
-				'output' => ['itemid'],
-				'itemids' => $itemIds,
-				'preservekeys' => true,
-				'webitems' => true
-			]);
-
-			foreach ($itemIds as $itemId) {
-				if (!isset($dbItems[$itemId])) {
-					self::exception(ZBX_API_ERROR_PERMISSIONS, _s(
-						'Incorrect item ID "%1$s" provided for screen element.', $itemId
-					));
-				}
-			}
-		}
-
-		// check item prototypes
-		if ($itemPrototypeIds) {
-			$dbItemPrototypes = API::ItemPrototype()->get([
-				'output' => ['itemid'],
-				'itemids' => $itemPrototypeIds,
-				'preservekeys' => true
-			]);
-
-			foreach ($itemPrototypeIds as $itemPrototypeId) {
-				if (!isset($dbItemPrototypes[$itemPrototypeId])) {
-					self::exception(ZBX_API_ERROR_PERMISSIONS, _s(
-						'Incorrect item prototype ID "%1$s" provided for screen element.', $itemPrototypeId
-					));
-				}
-			}
-		}
-
-		// check maps
-		if ($mapIds) {
-			$dbMaps = API::Map()->get([
-				'output' => ['sysmapid'],
-				'sysmapids' => $mapIds,
-				'preservekeys' => true
-			]);
-
-			foreach ($mapIds as $mapId) {
-				if (!isset($dbMaps[$mapId])) {
-					self::exception(ZBX_API_ERROR_PERMISSIONS, _s(
-						'Incorrect map ID "%1$s" provided for screen element.', $mapId
-					));
-				}
-			}
-		}
-
-		// check screens
-		if ($screenIds) {
-			$dbScreens = API::Screen()->get([
-				'output' => ['screenid'],
-				'screenids' => $screenIds,
-				'preservekeys' => true
-			]);
-
-			foreach ($screenIds as $screenId) {
-				if (!isset($dbScreens[$screenId])) {
-					self::exception(ZBX_API_ERROR_PERMISSIONS, _s(
-						'Incorrect screen ID "%1$s" provided for screen element.', $screenId
-					));
-				}
-			}
-		}
-	}
-
-	/**
-	 * Returns true if the given resource type is supported.
-	 *
-	 * @param int $resourceType
-	 *
-	 * @return bool
-	 */
-	protected function isValidResourceType($resourceType) {
-		return in_array($resourceType, self::$resourceTypes);
-	}
-
-	/**
-	 * Checks that the row and column spans are valid.
-	 *
-	 * @throws APIException if the any of the spans is not an integer or missing
-	 *
-	 * @param array $screenItem
-	 * @param array $screen
-	 */
-	protected function checkSpans(array $screenItem, array $screen) {
-		if (isset($screenItem['rowspan'])) {
-			if (!zbx_is_int($screenItem['rowspan']) || $screenItem['rowspan'] < 1) {
-				self::exception(
-					ZBX_API_ERROR_PARAMETERS,
-					_s(
-						'Screen "%1$s" row span in cell X - %2$s Y - %3$s is incorrect.',
-						$screen['name'],
-						$screenItem['x'],
-						$screenItem['y']
-					)
-				);
-			}
-		}
-
-		if (isset($screenItem['colspan'])) {
-			if (!zbx_is_int($screenItem['colspan']) || $screenItem['colspan'] < 1) {
-				self::exception(
-					ZBX_API_ERROR_PARAMETERS,
-					_s(
-						'Screen "%1$s" column span in cell X - %2$s Y - %3$s is incorrect.',
-						$screen['name'],
-						$screenItem['x'],
-						$screenItem['y']
-					)
-				);
-			}
-		}
-	}
-
-	/**
-	 * Checks that the row and column spans fit into the size of the screen.
-	 *
-	 * @throws APIException if the any of the spans is bigger then the free space on the screen
-	 *
-	 * @param array $screenItem
-	 * @param array $dbScreenItems
-	 * @param array $screen
-	 */
-	protected function checkSpansInBounds(array $screenItem, array $dbScreenItems, array $screen) {
-		if (!isset($screenItem['x'])) {
-			$screenItem['x'] = isset($screenItem['screenitemid'])
-				? $dbScreenItems[$screenItem['screenitemid']]['x']
-				: 0;
-		}
-		if (!isset($screenItem['y'])) {
-			$screenItem['y'] = isset($screenItem['screenitemid'])
-				? $dbScreenItems[$screenItem['screenitemid']]['y']
-				: 0;
-		}
-
-		if (isset($screenItem['rowspan']) && isset($screen['vsize'])
-				&& $screenItem['rowspan'] > $screen['vsize'] - $screenItem['y']) {
-			self::exception(
-				ZBX_API_ERROR_PARAMETERS,
-				_s(
-					'Screen "%1$s" row span in cell X - %2$s Y - %3$s is too big.',
-					$screen['name'],
-					$screenItem['x'],
-					$screenItem['y']
-				)
-			);
-		}
-
-		if (isset($screenItem['colspan']) && isset($screen['hsize'])
-				&& $screenItem['colspan'] > $screen['hsize'] - $screenItem['x']) {
-			self::exception(
-				ZBX_API_ERROR_PARAMETERS,
-				_s(
-					'Screen "%1$s" column span in cell X - %2$s Y - %3$s is too big.',
-					$screen['name'],
-					$screenItem['x'],
-					$screenItem['y']
-				)
-			);
-		}
-	}
-
-	/**
-	 * Check duplicates screen items in one cell.
-	 *
-	 * @param array  $screen_items
-	 * @param string $screen_items['screenid']
-	 * @param int    $screen_items['x']
-	 * @param int    $screen_items['y']
-	 * @param int    $screen_items['colspan']
-	 * @param int    $screen_items['rowspan']
-	 * @param array  $screens
-	 * @param string $screens['screenid']
-	 * @param string $screens['name']
-	 *
-	 * @throws APIException if input is invalid.
-	 */
-	protected function checkDuplicateResourceInCell(array $screen_items, array $screens) {
-		$calculated = [];
-
-		foreach ($screen_items as $screen_item) {
-			$screenid = $screen_item['screenid'];
-			$checked = [
-				'left' => $screen_item['x'],
-				'top' => $screen_item['y'],
-				'right' => $screen_item['x'] + $screen_item['colspan'] - 1,
-				'bottom' => $screen_item['y'] + $screen_item['rowspan'] - 1
-			];
-			if (!array_key_exists($screenid, $calculated)) {
-				$calculated[$screenid] = [];
-			}
-
-			foreach ($calculated[$screenid] as $entry) {
-				$overlaps_x = ($checked['left'] <= $entry['right'] && $checked['right'] >= $entry['left']);
-				$overlaps_y = ($checked['top'] <= $entry['bottom'] && $checked['bottom'] >= $entry['top']);
-				if ($overlaps_x && $overlaps_y) {
-					self::exception(ZBX_API_ERROR_PARAMETERS,
-						_s('Screen "%1$s" cell X - %2$s Y - %3$s is already taken.', $screens[$screenid]['name'],
-							$checked['left'], $checked['top']
-						)
-					);
-				}
-			}
-
-			$calculated[$screenid][] = $checked;
-		}
-	}
-
-	/**
-	 * Checks that the row and column fit into the size of the screen.
-	 *
-	 * @throws APIException if the any of the coordinates is bigger then the free space on the screen
-	 *
-	 * @param array $screenItem
-	 * @param array $screen
-	 */
-	protected function checkGridCoordinates(array $screenItem, array $screen) {
-		if (isset($screenItem['x']) && $screenItem['x'] > $screen['hsize'] - 1) {
-			self::exception(
-				ZBX_API_ERROR_PARAMETERS,
-				_s(
-					'The X coordinate of screen element located at X - %1$s and Y - %2$s of screen "%3$s" is too big.',
-					$screenItem['x'],
-					$screenItem['y'],
-					$screen['name']
-				)
-			);
-		}
-
-		if (isset($screenItem['y']) && $screenItem['y'] > $screen['vsize'] - 1) {
-			self::exception(
-				ZBX_API_ERROR_PARAMETERS,
-				_s(
-					'The Y coordinate of screen element located at X - %1$s and Y - %2$s of screen "%3$s" is too big.',
-					$screenItem['x'],
-					$screenItem['y'],
-					$screen['name']
-				)
-			);
-		}
-	}
-
-	protected function applyQueryFilterOptions($tableName, $tableAlias, array $options, array $sqlParts) {
-		$sqlParts = parent::applyQueryFilterOptions($tableName, $tableAlias, $options, $sqlParts);
-
-		// screens
-		if ($options['screenids'] !== null) {
-			zbx_value2array($options['screenids']);
-			$sqlParts['where'][] = dbConditionInt($this->fieldId('screenid'), $options['screenids']);
-		}
-
-		return $sqlParts;
-	}
-
-	/**
-	 * Checks if value of $maxColumns valid in respect to SCREEN_SURROGATE_MAX_COLUMNS_MIN and
-	 * SCREEN_SURROGATE_MAX_COLUMNS_MIN constants. Returns true if valid, false otherwise.
-	 *
-	 * @param integer $maxColumns
-	 *
-	 * @return bool
-	 */
-	protected function isValidMaxColumns($maxColumns) {
-		return ($maxColumns >= SCREEN_SURROGATE_MAX_COLUMNS_MIN && $maxColumns <= SCREEN_SURROGATE_MAX_COLUMNS_MAX);
-	}
-
-	/**
-	 * Validates URL fields for submitted screen items.
-	 *
-	 * @throws APIException for invalid URL
-	 *
-	 * @param array $screen_items	Array of screen items.
-	 */
-	protected function validateItemsURL($screen_items) {
-		foreach ($screen_items as $screen_item) {
-			if ($screen_item['resourcetype'] == SCREEN_RESOURCE_URL && array_key_exists('url', $screen_item)
-					&& !CHtmlUrlValidator::validate($screen_item['url'])) {
-				self::exception(ZBX_API_ERROR_PARAMETERS, _('Wrong value for url field.'));
-			}
-		}
-	}
-}
diff --git a/ui/include/classes/api/services/CUser.php b/ui/include/classes/api/services/CUser.php
index bc1174f974c..3eaf2c82e0a 100644
--- a/ui/include/classes/api/services/CUser.php
+++ b/ui/include/classes/api/services/CUser.php
@@ -1198,21 +1198,6 @@ class CUser extends CApiService {
 			);
 		}
 
-		// Check if deleted users have a screen.
-		$db_screens = API::Screen()->get([
-			'output' => ['name', 'userid'],
-			'userids' => $userids,
-			'limit' => 1
-		]);
-
-		if ($db_screens) {
-			self::exception(ZBX_API_ERROR_PARAMETERS,
-				_s('User "%1$s" is screen "%2$s" owner.', $db_users[$db_screens[0]['userid']]['alias'],
-					$db_screens[0]['name']
-				)
-			);
-		}
-
 		// Check if deleted users have a slide show.
 		$db_slideshows = DB::select('slideshows', [
 			'output' => ['name', 'userid'],
diff --git a/ui/tests/api_json/testAuditLog.php b/ui/tests/api_json/testAuditLog.php
index e034c7c2368..b192c457779 100644
--- a/ui/tests/api_json/testAuditLog.php
+++ b/ui/tests/api_json/testAuditLog.php
@@ -779,8 +779,8 @@ class testAuditLog extends CAPITest {
 				],
 				'$expected_result' => null,
 				'expected_error' => 'Invalid parameter "/filter/resourcetype/1": value must be one of 0, 2, 3, 4, 5,'.
-					' 6, 7, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33,'.
-					' 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 45.'
+					' 6, 7, 11, 12, 13, 14, 15, 16, 17, 18, 19, 22, 23, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,'.
+					' 36, 37, 38, 39, 40, 41, 42, 43, 45.'
 			],
 			// Filter validation - ip.
 			[