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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Cosray\Node; |
| 6 | |
| 7 | use Celema\Quma\Database; |
| 8 | use Cosray\Exception\RuntimeException; |
| 9 | |
| 10 | /** |
| 11 | * Writes manual node orders. A scope is either the children of one parent |
| 12 | * or the top level of one collection, and every scope keeps its own order, |
| 13 | * so a node can hold a position in several. Positions are structure, not |
| 14 | * content: they bypass content versions, history and working copies and |
| 15 | * take effect immediately. |
| 16 | * |
| 17 | * Callers pass the complete order of a scope, which is renumbered 1..n. |
| 18 | * Rows of members missing from it are dropped, so members without a |
| 19 | * position sort after the positioned ones. |
| 20 | * |
| 21 | * @api |
| 22 | */ |
| 23 | final class Positions |
| 24 | { |
| 25 | public function __construct( |
| 26 | private readonly Database $db, |
| 27 | ) {} |
| 28 | |
| 29 | /** @param list<string> $uids the parent's children in their new order */ |
| 30 | public function orderChildren(string $parent, array $uids): void |
| 31 | { |
| 32 | $this->db->positions->orderChildren([ |
| 33 | 'parent' => $parent, |
| 34 | 'uids' => json_encode(array_values($uids), JSON_THROW_ON_ERROR), |
| 35 | ])->run(); |
| 36 | } |
| 37 | |
| 38 | /** @param list<string> $uids the collection's top-level entries in their new order */ |
| 39 | public function orderEntries(string $collection, array $uids): void |
| 40 | { |
| 41 | $this->db->positions->orderEntries([ |
| 42 | 'collection' => $collection, |
| 43 | 'uids' => json_encode(array_values($uids), JSON_THROW_ON_ERROR), |
| 44 | ])->run(); |
| 45 | } |
| 46 | |
| 47 | /** |
| 48 | * The group with `$uid` moved directly before or after `$neighbour`. |
| 49 | * A neighbour rather than an index, because a listing may show only |
| 50 | * part of a group (a page, or the types a collection lists), where an |
| 51 | * index would be ambiguous. |
| 52 | * |
| 53 | * @param list<string> $group a scope's members in their current order |
| 54 | * @return list<string> |
| 55 | */ |
| 56 | public static function move(array $group, string $uid, string $neighbour, bool $after): array |
| 57 | { |
| 58 | if ($uid === $neighbour) { |
| 59 | throw new RuntimeException('A node cannot be placed next to itself'); |
| 60 | } |
| 61 | |
| 62 | if (!in_array($uid, $group, true) || !in_array($neighbour, $group, true)) { |
| 63 | throw new RuntimeException('The node and its neighbour must belong to the same group'); |
| 64 | } |
| 65 | |
| 66 | $rest = array_values(array_filter($group, static fn(string $member): bool => $member !== $uid)); |
| 67 | $index = (int) array_search($neighbour, $rest, true) + ($after ? 1 : 0); |
| 68 | array_splice($rest, $index, 0, [$uid]); |
| 69 | |
| 70 | return $rest; |
| 71 | } |
| 72 | } |