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Current File : /home/utripoli/www/journal/lib/pkp/classes/security/authorization/UserRolesRequiredPolicy.inc.php
<?php
/**
 * @file classes/security/authorization/UserRolesRequiredPolicy.inc.php
 *
 * Copyright (c) 2014-2021 Simon Fraser University
 * Copyright (c) 2000-2021 John Willinsky
 * Distributed under the GNU GPL v3. For full terms see the file docs/COPYING.
 *
 * @class UserRolesRequiredPolicy
 * @ingroup security_authorization
 *
 * @brief Policy to build an authorized user roles object. Because we may have
 * users with no roles, we don't deny access when no user roles are found.
 */

import('lib.pkp.classes.security.authorization.AuthorizationPolicy');

class UserRolesRequiredPolicy extends AuthorizationPolicy {
	/** @var Request */
	var $_request;

	/**
	 * Constructor
	 *
	 * @param $request PKPRequest
	 */
	function __construct($request) {
		parent::__construct();
		$this->_request = $request;
	}


	//
	// Implement template methods from AuthorizationPolicy
	//
	/**
	 * @see AuthorizationPolicy::effect()
	 */
	function effect() {
		$request = $this->_request;
		$user = $request->getUser();

		if (!is_a($user, 'User')) {
			return AUTHORIZATION_DENY;
		}

		// Get all user roles.
		$roleDao = DAORegistry::getDAO('RoleDAO'); /* @var $roleDao RoleDAO */
		$userRoles = $roleDao->getByUserIdGroupedByContext($user->getId());

		// Prepare an array with the context ids of the request.
		$application = Application::get();
		$contextDepth = $application->getContextDepth();
		$router = $request->getRouter();
		$roleContext = array();
		for ($contextLevel = 1; $contextLevel <= $contextDepth; $contextLevel++) {
			$context = $router->getContext($request, $contextLevel);
			$roleContext[] = $context?$context->getId():CONTEXT_ID_NONE;
		}

		$contextRoles = $this->_getContextRoles($roleContext, $contextDepth, $userRoles);

		$this->addAuthorizedContextObject(ASSOC_TYPE_USER_ROLES, $contextRoles);
		return AUTHORIZATION_PERMIT;
	}

	/**
	 * Get the current context roles from all user roles.
	 * @param array $roleContext
	 * @param int $contextDepth
	 * @param array $userRoles
	 * @return mixed array or null
	 */
	function _getContextRoles($roleContext, $contextDepth, $userRoles) {
		// Adapt the role context based on the passed role id.
		$workingRoleContext = $roleContext;
		$roleDao = DAORegistry::getDAO('RoleDAO'); /* @var $roleDao RoleDAO */
		$contextRoles = array();

		// Check if user has site level or manager roles.
		if ($contextDepth > 0) {
			if (array_key_exists(CONTEXT_ID_NONE, $userRoles) &&
			array_key_exists(ROLE_ID_SITE_ADMIN, $userRoles[CONTEXT_ID_NONE])) {
				// site level role
				$contextRoles[] = ROLE_ID_SITE_ADMIN;
			}
			if ($contextDepth == 2 &&
				array_key_exists(CONTEXT_ID_NONE, $userRoles[$workingRoleContext[0]]) &&
				array_key_exists(ROLE_ID_MANAGER, $userRoles[$workingRoleContext[0]][CONTEXT_ID_NONE])) {
				// This is a main context managerial role (i.e. conference-level).
				$contextRoles[] = ROLE_ID_MANAGER;
			}
		} else {
			// Application has no context.
			return $this->_prepareContextRolesArray($userRoles[CONTEXT_ID_NONE]);
		}

		// Get the user roles related to the passed context.
		for ($contextLevel = 1; $contextLevel <= $contextDepth; $contextLevel++) {
			$contextId = $workingRoleContext[$contextLevel-1];
			if ($contextId != CONTEXT_ID_NONE && isset($userRoles[$contextId])) {
				// Filter the user roles to the found context id.
				$userRoles = $userRoles[$contextId];

				// If we reached the context depth, search for the role id.
				if ($contextLevel == $contextDepth) {
					return $this->_prepareContextRolesArray($userRoles, $contextRoles);
				}
			} else {
				// Context id not present in user roles array.
				return $contextRoles;
			}
		}
	}

	/**
	 * Prepare an array with the passed user roles. Can optionally
	 * add those roles to an already created array.
	 * @param $userRoles array
	 * @param $contextRoles array
	 * @return array
	 */
	function _prepareContextRolesArray($userRoles, $contextRoles = array()) {
		foreach ($userRoles as $role) {
			$contextRoles[] = $role->getRoleId();
		}
		return $contextRoles;
	}
}

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