<?php
/**
 * test ElggRelationship
 *
 * @package Elgg
 * @subpackage Test
 */
class ElggRelationshipTest extends ElggCoreUnitTest {

	/**
	 * @var ElggEntity
	 */
	protected $entity1;
	protected $entity2;
	protected $entity3;

	/**
	 * Called before each test method.
	 */
	public function setUp() {
		$this->original_events = _elgg_services()->events;
		_elgg_services()->events = new Elgg\EventsService();

		$this->entity1 = new ElggObject();
		$this->entity1->subtype = 'elgg_relationship_test';
		$this->entity1->access_id = ACCESS_PUBLIC;
		$this->entity1->save();
		
		$this->entity2 = new ElggObject();
		$this->entity2->subtype = 'elgg_relationship_test';
		$this->entity2->access_id = ACCESS_PUBLIC;
		$this->entity2->save();
		
		$this->entity3 = new ElggObject();
		$this->entity3->subtype = 'elgg_relationship_test';
		$this->entity3->access_id = ACCESS_PUBLIC;
		$this->entity3->save();
	}

	/**
	 * Called after each test method.
	 */
	public function tearDown() {
		if ($this->entity1) {
			$this->entity1->delete();
		}
		
		if ($this->entity2) {
			$this->entity2->delete();
		}
		
		if ($this->entity3) {
			$this->entity3->delete();
		}
		remove_subtype('object', 'elgg_relationship_test');

		_elgg_services()->events = $this->original_events;
	}
	
	/**
	 * Tests
	 */
	public function testAddRelationship() {
		// test adding a relationship
		$this->assertTrue(add_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid));
		
		$r = check_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid);
		$this->assertIsA($r, 'ElggRelationship');
	}
	
	public function testRemoveRelationship() {
		// test adding a relationship
		$this->assertTrue(add_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid));
		
		$r = check_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid);
		$this->assertIsA($r, 'ElggRelationship');
		
		$this->assertTrue(remove_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid));
		
		$this->assertFalse(check_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid));
	}
	
	public function testPreventAddRelationship() {
		// test event handler - should prevent the addition of a relationship
		elgg_register_event_handler('create', 'relationship', 'Elgg\Values::getFalse');
		
		$this->assertFalse(add_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid));
		
		elgg_unregister_event_handler('create', 'relationship', 'Elgg\Values::getFalse');
		
		$this->assertFalse(check_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid));
	}
	
	public function testPreventRemoveRelationship() {
		$this->assertTrue(add_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid));
		$r = check_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid);
		$this->assertIsA($r, 'ElggRelationship');
		
		elgg_register_event_handler('delete', 'relationship', 'Elgg\Values::getFalse');
		
		$this->assertFalse(remove_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid));
		
		elgg_unregister_event_handler('delete', 'relationship', 'Elgg\Values::getFalse');
		
		$r = check_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid);
		$this->assertIsA($r, 'ElggRelationship');
	}
	
	public function testRelationshipSave() {
		$this->assertTrue(add_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid));
		$r = check_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid);
		$this->assertIsA($r, 'ElggRelationship');
		
		// note - string because that's how it's returned when getting a new object
		$r->guid_two = (string) $this->entity3->guid;
		$this->assertTrue($r->save());
		
		$test_r = check_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity3->guid);
		$this->assertIsA($test_r, 'ElggRelationship');
		$this->assertIdentical($r->guid_one, $test_r->guid_one);
		$this->assertIdentical($r->guid_two, $test_r->guid_two);
		$this->assertIdentical($r->relationship, $test_r->relationship);
		
		// the original shouldn't exist anymore
		$this->assertFalse(check_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid));
	}
	
	public function testRelationshipDelete() {
		$this->assertTrue(add_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid));
		$r = check_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid);
		$this->assertIsA($r, 'ElggRelationship');
		
		$this->assertTrue($r->delete());
		$this->assertFalse(check_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid));
	}
	
	public function testRelationshipOnEntityDelete() {
		$this->assertTrue(add_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid));
		
		// test deleting entity in guid_one position
		$this->entity1->delete();
		$this->assertFalse(check_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid));
		
		$this->assertTrue(add_entity_relationship($this->entity2->guid, 'test_relationship', $this->entity3->guid));
		
		// test deleting entity in guid_two position
		$this->entity3->delete();
		$this->assertFalse(check_entity_relationship($this->entity2->guid, 'test_relationship', $this->entity3->guid));
	}

	public function testPreventRelationshipOnEntityDelete() {
		$this->assertTrue(add_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid));
		$this->assertTrue(add_entity_relationship($this->entity2->guid, 'test_relationship', $this->entity1->guid));
		$guid = $this->entity1->guid;
		
		elgg_register_event_handler('delete', 'relationship', 'Elgg\Values::getFalse');
		
		$this->assertTrue($this->entity1->delete());
		
		elgg_unregister_event_handler('delete', 'relationship', 'Elgg\Values::getFalse');
		
		// relationships should still be gone as there is no entity
		// despite the fact we have a handler trying to prevent it
		$this->assertFalse(check_entity_relationship($guid, 'test_relationship', $this->entity2->guid));
		$this->assertFalse(check_entity_relationship($this->entity2->guid, 'test_relationship', $guid));
	}
	
	public function testEntityMethodAddRelationship() {
		$this->assertTrue($this->entity1->addRelationship($this->entity2->guid, 'test_relationship'));
		$r = check_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid);
		$this->assertIsA($r, 'ElggRelationship');
	}
	
	public function testEntityMethodRemoveRelationship() {
		$this->assertTrue($this->entity1->addRelationship($this->entity2->guid, 'test_relationship'));
		$r = check_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid);
		$this->assertIsA($r, 'ElggRelationship');
		
		$this->assertTrue($this->entity1->removeRelationship($this->entity2->guid, 'test_relationship'));
		$this->assertFalse(check_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid));
	}
	
	public function testEntityMethodDeleteRelationships() {
		$this->assertTrue($this->entity1->addRelationship($this->entity2->guid, 'test_relationship'));
		$r = check_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid);
		$this->assertIsA($r, 'ElggRelationship');
		
		$this->assertTrue($this->entity1->addRelationship($this->entity3->guid, 'test_relationship'));
		$r = check_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity3->guid);
		$this->assertIsA($r, 'ElggRelationship');
		
		$this->assertTrue($this->entity3->addRelationship($this->entity1->guid, 'test_relationship'));
		$r = check_entity_relationship($this->entity3->guid, 'test_relationship', $this->entity1->guid);
		$this->assertIsA($r, 'ElggRelationship');
		
		$this->assertTrue($this->entity1->deleteRelationships('test_relationship'));
		$this->assertFalse(check_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid));
		$this->assertFalse(check_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity3->guid));
		
		// inverse relationships should be gone too
		$this->assertFalse(check_entity_relationship($this->entity3->guid, 'test_relationship', $this->entity1->guid));
		
		
		// Repeat above test, but with no relationship - should remove all relationships
		$this->assertTrue($this->entity1->addRelationship($this->entity2->guid, 'test_relationship'));
		$r = check_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid);
		$this->assertIsA($r, 'ElggRelationship');
		
		$this->assertTrue($this->entity1->addRelationship($this->entity3->guid, 'test_relationship'));
		$r = check_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity3->guid);
		$this->assertIsA($r, 'ElggRelationship');
		
		$this->assertTrue($this->entity3->addRelationship($this->entity1->guid, 'test_relationship'));
		$r = check_entity_relationship($this->entity3->guid, 'test_relationship', $this->entity1->guid);
		$this->assertIsA($r, 'ElggRelationship');
		
		$this->assertTrue($this->entity1->addRelationship($this->entity2->guid, 'test_relationship2'));
		$r = check_entity_relationship($this->entity1->guid, 'test_relationship2', $this->entity2->guid);
		$this->assertIsA($r, 'ElggRelationship');
		
		$this->assertTrue($this->entity1->addRelationship($this->entity3->guid, 'test_relationship2'));
		$r = check_entity_relationship($this->entity1->guid, 'test_relationship2', $this->entity3->guid);
		$this->assertIsA($r, 'ElggRelationship');
		
		$this->assertTrue($this->entity1->deleteRelationships());
		$this->assertFalse(check_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity2->guid));
		$this->assertFalse(check_entity_relationship($this->entity1->guid, 'test_relationship', $this->entity3->guid));
		$this->assertFalse(check_entity_relationship($this->entity1->guid, 'test_relationship2', $this->entity2->guid));
		$this->assertFalse(check_entity_relationship($this->entity1->guid, 'test_relationship2', $this->entity3->guid));
		
		// inverse relationships should be gone too
		$this->assertFalse(check_entity_relationship($this->entity3->guid, 'test_relationship', $this->entity1->guid));
	}
}