CurrentUser::determineIdentity() - Code Metrics - Inspection of "Split user" - yiisoft/user - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — master (#24)

by Sergei

created 2021-02-22 17:56 UTC

CurrentUser::determineIdentity() A

↳ Parent: CurrentUser

Complexity

Conditions	2
Paths	2

Size

Total Lines	10
Code Lines	5

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	6
CRAP Score	2

Importance

Changes

Metric	Value
cc	2
eloc	5
nc	2
nop	0
dl	0
loc	10
ccs	6
cts	6
cp	1
crap	2
rs	10
c	0
b	0
f	0

<?php

declare(strict_types=1);

namespace Yiisoft\User\CurrentUser;

use Psr\EventDispatcher\EventDispatcherInterface;
use Yiisoft\Access\AccessCheckerInterface;
use Yiisoft\Auth\IdentityInterface;
use Yiisoft\Auth\IdentityRepositoryInterface;
use Yiisoft\User\CurrentUser\Storage\CurrentIdentityStorageInterface;
use Yiisoft\User\CurrentUser\Event\AfterLogout;
use Yiisoft\User\CurrentUser\Event\AfterLogin;
use Yiisoft\User\CurrentUser\Event\BeforeLogout;
use Yiisoft\User\CurrentUser\Event\BeforeLogin;
use Yiisoft\User\GuestIdentity;

/**
 * Maintains current identity and allows logging in and out using it.
 */
final class CurrentUser
{
    private CurrentIdentityStorageInterface $currentIdentityStorage;
    private IdentityRepositoryInterface $identityRepository;
    private EventDispatcherInterface $eventDispatcher;
    private ?AccessCheckerInterface $accessChecker = null;

    private ?IdentityInterface $identity = null;
    private ?IdentityInterface $temporaryIdentity = null;

    public function __construct(
        CurrentIdentityStorageInterface $currentIdentityStorage,
        IdentityRepositoryInterface $identityRepository,
        EventDispatcherInterface $eventDispatcher
    ) {
        $this->currentIdentityStorage = $currentIdentityStorage;
        $this->identityRepository = $identityRepository;
        $this->eventDispatcher = $eventDispatcher;
    }

    public function setAccessChecker(AccessCheckerInterface $accessChecker): void
    {
        $this->accessChecker = $accessChecker;
    }

    /**
     * Returns the identity object associated with the currently logged-in user.
     */
    public function getIdentity(): IdentityInterface
    {
        $identity = $this->temporaryIdentity ?? $this->identity;

        if ($identity === null) {
            $identity = $this->determineIdentity();
            $this->identity = $identity;
        }

        return $identity;
    }

    private function determineIdentity(): IdentityInterface
    {
        $identity = null;

        $id = $this->currentIdentityStorage->get();
        if ($id !== null) {
            $identity = $this->identityRepository->findIdentity($id);
        }

        return $identity ?? new GuestIdentity();
    }

    /**
     * Returns a value that uniquely represents the user.
     *
     * @see CurrentUser::getIdentity()
     *
     * @return string|null The unique identifier for the user. If `null`, it means the user is a guest.     *
     */
    public function getId(): ?string
    {
        return $this->getIdentity()->getId();
    }

    /**
     * Returns a value indicating whether the user is a guest (not authenticated).
     *
     * @see getIdentity()
     *
     * @return bool Whether the current user is a guest.
     */
    public function isGuest(): bool
    {
        return $this->getIdentity() instanceof GuestIdentity;
    }

    /**
     * Checks if the user can perform the operation as specified by the given permission.
     *
     * Note that you must provide access checker via {@see CurrentUser::setAccessChecker()} in order to use this
     * method. Otherwise it will always return `false`.
     *
     * @param string $permissionName The name of the permission (e.g. "edit post") that needs access check.
     * @param array $params Name-value pairs that would be passed to the rules associated with the roles and
     * permissions assigned to the user.
     *
     * @return bool Whether the user can perform the operation as specified by the given permission.
     */
    public function can(string $permissionName, array $params = []): bool
    {
        if ($this->accessChecker === null) {
            return false;
        }

        return $this->accessChecker->userHasPermission($this->getId(), $permissionName, $params);
    }

    /**
     * Logs in a user.
     *
     * @param IdentityInterface $identity The user identity (which should already be authenticated).
     *
     * @return bool Whether the user is logged in.
     */
    public function login(IdentityInterface $identity): bool
    {
        if ($this->beforeLogin($identity)) {
            $this->switchIdentity($identity);
            $this->afterLogin($identity);
        }
        return !$this->isGuest();
    }

    /**
     * This method is called before logging in a user.
     * The default implementation will trigger the {@see BeforeLogin} event.
     *
     * @param IdentityInterface $identity The user identity information.
     *
     * @return bool Whether the user should continue to be logged in.
     */
    private function beforeLogin(IdentityInterface $identity): bool
    {
        $event = new BeforeLogin($identity);
        $this->eventDispatcher->dispatch($event);
        return $event->isValid();
    }

    /**
     * This method is called after the user is successfully logged in.
     *
     * @param IdentityInterface $identity The user identity information.
     */
    private function afterLogin(IdentityInterface $identity): void
    {
        $this->eventDispatcher->dispatch(new AfterLogin($identity));
    }

    /**
     * Logs out the current user.
     *
     * @return bool Whether the user is logged out.
     */
    public function logout(): bool
    {
        if ($this->isGuest()) {
            return false;
        }

        $identity = $this->getIdentity();
        if ($this->beforeLogout($identity)) {
            $this->switchIdentity(new GuestIdentity());
            $this->afterLogout($identity);
        }

        return $this->isGuest();
    }

    /**
     * This method is invoked when calling {@see CurrentUser::logout()} to log out a user.
     *
     * @param IdentityInterface $identity The user identity information.
     *
     * @return bool Whether the user should continue to be logged out.
     */
    private function beforeLogout(IdentityInterface $identity): bool
    {
        $event = new BeforeLogout($identity);
        $this->eventDispatcher->dispatch($event);
        return $event->isValid();
    }

    /**
     * This method is invoked right after a user is logged out via {@see CurrentUser::logout()}.
     *
     * @param IdentityInterface $identity The user identity information.
     */
    private function afterLogout(IdentityInterface $identity): void
    {
        $this->eventDispatcher->dispatch(new AfterLogout($identity));
    }

    public function setTemporaryIdentity(IdentityInterface $identity): void
    {
        $this->temporaryIdentity = $identity;
    }

    public function clearTemporaryIdentity(): void
    {
        $this->temporaryIdentity = null;
    }

    /**
     * Switches to a new identity for the current user.
     *
     * This method is called by {@see CurrentUser::login()} and {@see CurrentUser::logout()}
     * when the current user needs to be associated with the corresponding identity information.
     *
     * @param IdentityInterface $identity The identity information to be associated with the current user.
     * In order to indicate that the user is guest, use {@see GuestIdentity}.
     */
    private function switchIdentity(IdentityInterface $identity): void
    {
        $this->identity = $identity;

        $id = $identity->getId();
        if ($id === null) {
            $this->currentIdentityStorage->clear();
        } else {
            $this->currentIdentityStorage->set($id);
        }
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		namespace Yiisoft\User\CurrentUser;
6
7		use Psr\EventDispatcher\EventDispatcherInterface;
8		use Yiisoft\Access\AccessCheckerInterface;
9		use Yiisoft\Auth\IdentityInterface;
10		use Yiisoft\Auth\IdentityRepositoryInterface;
11		use Yiisoft\User\CurrentUser\Storage\CurrentIdentityStorageInterface;
12		use Yiisoft\User\CurrentUser\Event\AfterLogout;
13		use Yiisoft\User\CurrentUser\Event\AfterLogin;
14		use Yiisoft\User\CurrentUser\Event\BeforeLogout;
15		use Yiisoft\User\CurrentUser\Event\BeforeLogin;
16		use Yiisoft\User\GuestIdentity;
17
18		/**
19		* Maintains current identity and allows logging in and out using it.
20		*/
21		final class CurrentUser
22		{
23		private CurrentIdentityStorageInterface $currentIdentityStorage;
24		private IdentityRepositoryInterface $identityRepository;
25		private EventDispatcherInterface $eventDispatcher;
26		private ?AccessCheckerInterface $accessChecker = null;
27
28		private ?IdentityInterface $identity = null;
29		private ?IdentityInterface $temporaryIdentity = null;
30
31	25	public function __construct(
32		CurrentIdentityStorageInterface $currentIdentityStorage,
33		IdentityRepositoryInterface $identityRepository,
34		EventDispatcherInterface $eventDispatcher
35		) {
36	25	$this->currentIdentityStorage = $currentIdentityStorage;
37	25	$this->identityRepository = $identityRepository;
38	25	$this->eventDispatcher = $eventDispatcher;
39	25	}
40
41	1	public function setAccessChecker(AccessCheckerInterface $accessChecker): void
42		{
43	1	$this->accessChecker = $accessChecker;
44	1	}
45
46		/**
47		* Returns the identity object associated with the currently logged-in user.
48		*/
49	20	public function getIdentity(): IdentityInterface
50		{
51	20	$identity = $this->temporaryIdentity ?? $this->identity;
52
53	20	if ($identity === null) {
54	14	$identity = $this->determineIdentity();
55	14	$this->identity = $identity;
56		}
57
58	20	return $identity;
59		}
60
61	14	private function determineIdentity(): IdentityInterface
62		{
63	14	$identity = null;
64
65	14	$id = $this->currentIdentityStorage->get();
66	14	if ($id !== null) {
67	2	$identity = $this->identityRepository->findIdentity($id);
68		}
69
70	14	return $identity ?? new GuestIdentity();
71		}
72
73		/**
74		* Returns a value that uniquely represents the user.
75		*
76		* @see CurrentUser::getIdentity()
77		*
78		* @return string\|null The unique identifier for the user. If `null`, it means the user is a guest. *
79		*/
80	1	public function getId(): ?string
81		{
82	1	return $this->getIdentity()->getId();
83		}
84
85		/**
86		* Returns a value indicating whether the user is a guest (not authenticated).
87		*
88		* @see getIdentity()
89		*
90		* @return bool Whether the current user is a guest.
91		*/
92	15	public function isGuest(): bool
93		{
94	15	return $this->getIdentity() instanceof GuestIdentity;
95		}
96
97		/**
98		* Checks if the user can perform the operation as specified by the given permission.
99		*
100		* Note that you must provide access checker via {@see CurrentUser::setAccessChecker()} in order to use this
101		* method. Otherwise it will always return `false`.
102		*
103		* @param string $permissionName The name of the permission (e.g. "edit post") that needs access check.
104		* @param array $params Name-value pairs that would be passed to the rules associated with the roles and
105		* permissions assigned to the user.
106		*
107		* @return bool Whether the user can perform the operation as specified by the given permission.
108		*/
109	2	public function can(string $permissionName, array $params = []): bool
110		{
111	2	if ($this->accessChecker === null) {
112	1	return false;
113		}
114
115	1	return $this->accessChecker->userHasPermission($this->getId(), $permissionName, $params);
116		}
117
118		/**
119		* Logs in a user.
120		*
121		* @param IdentityInterface $identity The user identity (which should already be authenticated).
122		*
123		* @return bool Whether the user is logged in.
124		*/
125	8	public function login(IdentityInterface $identity): bool
126		{
127	8	if ($this->beforeLogin($identity)) {
128	8	$this->switchIdentity($identity);
129	8	$this->afterLogin($identity);
130		}
131	8	return !$this->isGuest();
132		}
133
134		/**
135		* This method is called before logging in a user.
136		* The default implementation will trigger the {@see BeforeLogin} event.
137		*
138		* @param IdentityInterface $identity The user identity information.
139		*
140		* @return bool Whether the user should continue to be logged in.
141		*/
142	8	private function beforeLogin(IdentityInterface $identity): bool
143		{
144	8	$event = new BeforeLogin($identity);
145	8	$this->eventDispatcher->dispatch($event);
146	8	return $event->isValid();
147		}
148
149		/**
150		* This method is called after the user is successfully logged in.
151		*
152		* @param IdentityInterface $identity The user identity information.
153		*/
154	8	private function afterLogin(IdentityInterface $identity): void
155		{
156	8	$this->eventDispatcher->dispatch(new AfterLogin($identity));
157	8	}
158
159		/**
160		* Logs out the current user.
161		*
162		* @return bool Whether the user is logged out.
163		*/
164	3	public function logout(): bool
165		{
166	3	if ($this->isGuest()) {
167	1	return false;
168		}
169
170	2	$identity = $this->getIdentity();
171	2	if ($this->beforeLogout($identity)) {
172	2	$this->switchIdentity(new GuestIdentity());
173	2	$this->afterLogout($identity);
174		}
175
176	2	return $this->isGuest();
177		}
178
179		/**
180		* This method is invoked when calling {@see CurrentUser::logout()} to log out a user.
181		*
182		* @param IdentityInterface $identity The user identity information.
183		*
184		* @return bool Whether the user should continue to be logged out.
185		*/
186	2	private function beforeLogout(IdentityInterface $identity): bool
187		{
188	2	$event = new BeforeLogout($identity);
189	2	$this->eventDispatcher->dispatch($event);
190	2	return $event->isValid();
191		}
192
193		/**
194		* This method is invoked right after a user is logged out via {@see CurrentUser::logout()}.
195		*
196		* @param IdentityInterface $identity The user identity information.
197		*/
198	2	private function afterLogout(IdentityInterface $identity): void
199		{
200	2	$this->eventDispatcher->dispatch(new AfterLogout($identity));
201	2	}
202
203	2	public function setTemporaryIdentity(IdentityInterface $identity): void
204		{
205	2	$this->temporaryIdentity = $identity;
206	2	}
207
208	1	public function clearTemporaryIdentity(): void
209		{
210	1	$this->temporaryIdentity = null;
211	1	}
212
213		/**
214		* Switches to a new identity for the current user.
215		*
216		* This method is called by {@see CurrentUser::login()} and {@see CurrentUser::logout()}
217		* when the current user needs to be associated with the corresponding identity information.
218		*
219		* @param IdentityInterface $identity The identity information to be associated with the current user.
220		* In order to indicate that the user is guest, use {@see GuestIdentity}.
221		*/
222	8	private function switchIdentity(IdentityInterface $identity): void
223		{
224	8	$this->identity = $identity;
225
226	8	$id = $identity->getId();
227	8	if ($id === null) {
228	2	$this->currentIdentityStorage->clear();
229		} else {
230	8	$this->currentIdentityStorage->set($id);
231		}
232	8	}
233		}
234

yiisoft / user

Pull Request — master (#24)

CurrentUser::determineIdentity() A

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Duplication

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