File Relations/Concerns/AutoloadsOtherRelations.php

1:	<?php
2:
3:	namespace Baril\Bonsai\Relations\Concerns;
4:
5:	use Illuminate\Database\Eloquent\Collection as EloquentCollection;
6:	use Illuminate\Database\Eloquent\Relations\Relation;
7:
8:	/**
9:	* @mixin \Illuminate\Database\Eloquent\Relations\Relation
10:	*/
11:	trait AutoloadsOtherRelations
12:	{
13:	protected $otherRelationsAutoloads;
14:
15:	public function autoloads($relation, $callback = null)
16:	{
17:	$this->otherRelationsAutoloads[$relation] = $callback ?? function ($models, $results) {
18:	return [$models, $results];
19:	};
20:
21:	return $this;
22:	}
23:
24:	/**
25:	* @see \Illuminate\Database\Eloquent\Relations\BelongsToMany::getResults()
26:	*
27:	* @return \Illuminate\Database\Eloquent\Collection
28:	*/
29:	public function getResults()
30:	{
31:	$results = parent::getResults();
32:
33:	$this->matchOtherRelations([$this->parent], $results);
34:	$this->matchOtherRelations($results->all(), $results);
35:
36:	return $results;
37:	}
38:
39:	/**
40:	* Match the eagerly loaded results to their parents.
41:	*
42:	* @see \Illuminate\Database\Eloquent\Relations\BelongsToMany::match()
43:	*
44:	* @param array<int, TDeclaringModel> $models
45:	* @param \Illuminate\Database\Eloquent\Collection<int, TRelatedModel> $results
46:	* @param string $relation
47:	* @return array<int, TDeclaringModel>
48:	*/
49:	public function match(array $models, EloquentCollection $results, $relation)
50:	{
51:	parent::match($models, $results, $relation);
52:
53:	$this->matchOtherRelations($models, $results);
54:	$this->matchOtherRelations($results->all(), $results);
55:
56:	return $models;
57:	}
58:
59:	protected function matchOtherRelations(array $models, EloquentCollection $results)
60:	{
61:	foreach ($this->otherRelationsAutoloads as $relation => $callback) {
62:	list($models, $results) = $callback($models, $results);
63:	$this->matchOtherRelation($models, $results, $relation);
64:	}
65:	}
66:
67:	/**
68:	* On $this, and on each of the related models that were loaded by
69:	* a "through-closures" relation (eg. "ancestors"), load the corresponding
70:	* "closed" relation (eg. "parent").
71:	*
72:	* @param array<int, TDeclaringModel> $models
73:	* @param \Illuminate\Database\Eloquent\Collection<int, TRelatedModel> $results
74:	* @param string $relation
75:	* @return array
76:	*/
77:	protected function matchOtherRelation(array $models, EloquentCollection $results, $relation)
78:	{
79:	$model = $models[0] ?? null;
80:	if (!$model) {
81:	return $models;
82:	}
83:
84:	/**
85:	* @var \Illuminate\Database\Eloquent\Relations\Relation
86:	*/
87:	$relationObject = Relation::noConstraints(function () use ($model, $relation) {
88:	return $model->$relation();
89:	});
90:
91:	// Prevents an unneeded query in case we try to access the relation on a leaf/root:
92:	$relationObject->initRelation($models, $relation);
93:
94:	// Set relation for all related models and parent model:
95:	return $relationObject->match(
96:	$models,
97:	$results,
98:	$relation
99:	);
100:	}
101:	}
102:

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