class StageOwnershipTest

class StageOwnershipTest extends PackageManagerKernelTestBase {
    use UserCreationTrait;
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'system',
        'user',
        'package_manager_test_validation',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->installEntitySchema('user');
    }
    
    /**
     * Tests only the owner of stage can perform operations, even if logged out.
     */
    public function testOwnershipEnforcedWhenLoggedOut() : void {
        $this->assertOwnershipIsEnforced($this->createStage(), $this->createStage());
    }
    
    /**
     * Tests only the owner of stage can perform operations.
     */
    public function testOwnershipEnforcedWhenLoggedIn() : void {
        $user_1 = $this->createUser([], NULL, FALSE, [
            'uid' => 2,
        ]);
        $this->setCurrentUser($user_1);
        $will_create = $this->createStage();
        // Rebuild the container so that the shared tempstore factory is made
        // properly aware of the new current user ($user_2) before another stage
        // is created.
        $kernel = $this->container
            ->get('kernel');
        $this->container = $kernel->rebuildContainer();
        $user_2 = $this->createUser();
        $this->setCurrentUser($user_2);
        $this->assertOwnershipIsEnforced($will_create, $this->createStage());
    }
    
    /**
     * Asserts that ownership is enforced across stage directories.
     *
     * @param \Drupal\Tests\package_manager\Kernel\TestStage $will_create
     *   The stage that will be created, and owned by the current user or session.
     * @param \Drupal\Tests\package_manager\Kernel\TestStage $never_create
     *   The stage that will not be created, but should still respect the
     *   ownership and status of the other stage.
     */
    private function assertOwnershipIsEnforced(TestStage $will_create, TestStage $never_create) : void {
        // Before the stage directory is created, isAvailable() should return
        // TRUE.
        $this->assertTrue($will_create->isAvailable());
        $this->assertTrue($never_create->isAvailable());
        $stage_id = $will_create->create();
        // Both stage directories should be considered unavailable (i.e., cannot
        // be created until the existing one is destroyed first).
        $this->assertFalse($will_create->isAvailable());
        $this->assertFalse($never_create->isAvailable());
        // We should get an error if we try to create the stage directory again,
        // regardless of who owns it.
        foreach ([
            $will_create,
            $never_create,
        ] as $stage) {
            try {
                $stage->create();
                $this->fail("Able to create a stage that already exists.");
            } catch (StageException $exception) {
                $this->assertSame('Cannot create a new stage because one already exists.', $exception->getMessage());
            }
        }
        try {
            $never_create->claim($stage_id);
        } catch (StageOwnershipException $exception) {
            $this->assertSame('Cannot claim the stage because it is not owned by the current user or session.', $exception->getMessage());
        }
        // Only the stage's owner should be able to move it through its life cycle.
        $callbacks = [
            'require' => [
                [
                    'vendor/lib:0.0.1',
                ],
            ],
            'apply' => [],
            'postApply' => [],
            'destroy' => [],
        ];
        foreach ($callbacks as $method => $arguments) {
            try {
                $never_create->{$method}(...$arguments);
                $this->fail("Able to call '{$method}' on a stage that was never created.");
            } catch (\LogicException $exception) {
                $this->assertSame('Stage must be claimed before performing any operations on it.', $exception->getMessage());
            }
            // The call should succeed on the created stage.
            $will_create->{$method}(...$arguments);
        }
    }
    
    /**
     * Tests that the stage is owned by the person who calls create() on it.
     */
    public function testStageOwnedByCreator() : void {
        // Even if the stage is instantiated before anyone is logged in, it should
        // still be owned (and claimable) by the user who called create() on it.
        $stage = $this->createStage();
        $account = $this->createUser([], NULL, FALSE, [
            'uid' => 2,
        ]);
        $this->setCurrentUser($account);
        $id = $stage->create();
        $this->createStage()
            ->claim($id);
    }
    
    /**
     * Tests behavior of claiming a stage.
     */
    public function testClaim() : void {
        // Log in as a user so that any stage instances created during the session
        // should be able to successfully call ::claim().
        $user_2 = $this->createUser([], NULL, FALSE, [
            'uid' => 2,
        ]);
        $this->setCurrentUser($user_2);
        $creator_stage = $this->createStage();
        // Ensure that exceptions thrown during ::create() will not lock the stage.
        $error = new \Exception('I am going to stop stage creation.');
        TestSubscriber::setException($error, PreCreateEvent::class);
        try {
            $creator_stage->create();
            $this->fail('Was able to create the stage despite throwing an exception in pre-create.');
        } catch (\RuntimeException $exception) {
            $this->assertSame($error->getMessage(), $exception->getMessage());
        }
        // The stage should be available, and throw if we try to claim it.
        $this->assertTrue($creator_stage->isAvailable());
        try {
            $creator_stage->claim('any-id-would-fail');
            $this->fail('Was able to claim a stage that has not been created.');
        } catch (StageException $exception) {
            $this->assertSame('Cannot claim the stage because no stage has been created.', $exception->getMessage());
        }
        TestSubscriber::setException(NULL, PreCreateEvent::class);
        // Even if we own the stage, we should not be able to claim it with an
        // incorrect ID.
        $stage_id = $creator_stage->create();
        try {
            $this->createStage()
                ->claim('not-correct-id');
            $this->fail('Was able to claim an owned stage with an incorrect ID.');
        } catch (StageOwnershipException $exception) {
            $this->assertSame('Cannot claim the stage because the current lock does not match the stored lock.', $exception->getMessage());
        }
        // A stage that is successfully claimed should be able to call any method
        // for its life cycle.
        $callbacks = [
            'require' => [
                [
                    'vendor/lib:0.0.1',
                ],
            ],
            'apply' => [],
            'postApply' => [],
            'destroy' => [],
        ];
        foreach ($callbacks as $method => $arguments) {
            // Create a new stage instance for each method.
            $this->createStage()
                ->claim($stage_id)
                ->{$method}(...$arguments);
        }
        // The stage cannot be claimed after it's been destroyed.
        try {
            $this->createStage()
                ->claim($stage_id);
            $this->fail('Was able to claim an owned stage after it was destroyed.');
        } catch (StageException $exception) {
            $this->assertSame('This operation was already canceled.', $exception->getMessage());
        }
        // Create a new stage and then log in as a different user.
        $new_stage_id = $this->createStage()
            ->create();
        $user_3 = $this->createUser([], NULL, FALSE, [
            'uid' => 3,
        ]);
        $this->setCurrentUser($user_3);
        // Even if they use the correct stage ID, the current user cannot claim a
        // stage they didn't create.
        try {
            $this->createStage()
                ->claim($new_stage_id);
        } catch (StageOwnershipException $exception) {
            $this->assertSame('Cannot claim the stage because it is not owned by the current user or session.', $exception->getMessage());
        }
    }
    
    /**
     * Tests a stage being destroyed by a user who doesn't own it.
     */
    public function testForceDestroy() : void {
        $owned = $this->createStage();
        $owned->create();
        $not_owned = $this->createStage();
        try {
            $not_owned->destroy();
            $this->fail("Able to destroy a stage that we don't own.");
        } catch (\LogicException $exception) {
            $this->assertSame('Stage must be claimed before performing any operations on it.', $exception->getMessage());
        }
        // We should be able to destroy the stage if we ignore ownership.
        $not_owned->destroy(TRUE);
    }

}