DependencyResolver.php
94 lines
| 1 | <?php |
| 2 | |
| 3 | namespace WPStaging\Framework\DependencyResolver; |
| 4 | |
| 5 | use WPStaging\Framework\DependencyResolver\Exceptions\CircularReferenceException; |
| 6 | use WPStaging\Framework\DependencyResolver\Exceptions\MissingReferenceException; |
| 7 | use WPStaging\Framework\DependencyResolver\Exceptions\ResolveException; |
| 8 | |
| 9 | |
| 10 | |
| 11 | |
| 12 | |
| 13 | |
| 14 | |
| 15 | |
| 16 | class DependencyResolver |
| 17 | { |
| 18 | |
| 19 | |
| 20 | |
| 21 | |
| 22 | public static function resolve(array $tree, $resolveBehaviour = null) |
| 23 | { |
| 24 | if (is_null($resolveBehaviour)) { |
| 25 | $resolveBehaviour = ResolveBehaviour::create()->setThrowOnCircularReference(true); |
| 26 | } |
| 27 | |
| 28 | $resolved = []; |
| 29 | $unresolved = []; |
| 30 | |
| 31 | |
| 32 | foreach (array_keys($tree) as $table) { |
| 33 | list($resolved, $unresolved, $returnImmediately) = self::resolver($table, $tree, $resolved, $unresolved, $resolveBehaviour); |
| 34 | |
| 35 | if ($returnImmediately) { |
| 36 | return $resolved; |
| 37 | } |
| 38 | } |
| 39 | |
| 40 | return $resolved; |
| 41 | } |
| 42 | |
| 43 | |
| 44 | |
| 45 | |
| 46 | |
| 47 | |
| 48 | private static function resolver($item, array $items, array $resolved, array $unresolved, ResolveBehaviour $resolveBehaviour) |
| 49 | { |
| 50 | $unresolved[] = $item; |
| 51 | |
| 52 | foreach ($items[$item] as $dep) { |
| 53 | if (!array_key_exists($dep, $items)) { |
| 54 | if ($resolveBehaviour->isThrowOnMissingReference()) { |
| 55 | throw new MissingReferenceException($item, $dep); |
| 56 | } |
| 57 | |
| 58 | return [$resolved, $unresolved, true]; |
| 59 | } |
| 60 | |
| 61 | if (in_array($dep, $resolved, true)) { |
| 62 | continue; |
| 63 | } |
| 64 | |
| 65 | if (in_array($dep, $unresolved, true)) { |
| 66 | if ($resolveBehaviour->isThrowOnCircularReference()) { |
| 67 | throw new CircularReferenceException($item, $dep); |
| 68 | } |
| 69 | |
| 70 | return [$resolved, $unresolved, true]; |
| 71 | } |
| 72 | |
| 73 | $unresolved[] = $dep; |
| 74 | list($resolved, $unresolved, $returnImmediately) = self::resolver($dep, $items, $resolved, $unresolved, $resolveBehaviour); |
| 75 | |
| 76 | if ($returnImmediately) { |
| 77 | return [$resolved, $unresolved, $returnImmediately]; |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | |
| 82 | if (!in_array($item, $resolved, true)) { |
| 83 | $resolved[] = $item; |
| 84 | } |
| 85 | |
| 86 | |
| 87 | while (($index = array_search($item, $unresolved, true)) !== false) { |
| 88 | unset($unresolved[$index]); |
| 89 | } |
| 90 | |
| 91 | return [$resolved, $unresolved, false]; |
| 92 | } |
| 93 | } |
| 94 |