|
| 1 | +<?php |
| 2 | + |
| 3 | +namespace App\Services; |
| 4 | + |
| 5 | +use App\Models\Group; |
| 6 | +use Illuminate\Support\Facades\DB; |
| 7 | + |
| 8 | +class SortService |
| 9 | +{ |
| 10 | + /** |
| 11 | + * Bulk-update channels' sort order using DB window functions when available, |
| 12 | + * falling back to a single CASE-based UPDATE to avoid N queries. |
| 13 | + */ |
| 14 | + public function bulkSortGroupChannels(Group $record, string $order = 'ASC'): void |
| 15 | + { |
| 16 | + $direction = strtoupper($order) === 'DESC' ? 'DESC' : 'ASC'; |
| 17 | + $driver = DB::getPdo()->getAttribute(\PDO::ATTR_DRIVER_NAME); |
| 18 | + |
| 19 | + // MySQL (8+) |
| 20 | + if ($driver === 'mysql') { |
| 21 | + DB::statement("UPDATE channels c JOIN (SELECT id, ROW_NUMBER() OVER (ORDER BY COALESCE(title_custom, title) {$direction}) AS rn FROM channels WHERE group_id = ?) t ON c.id = t.id SET c.sort = t.rn", [$record->id]); |
| 22 | + |
| 23 | + return; |
| 24 | + } |
| 25 | + |
| 26 | + // Postgres |
| 27 | + if (str_starts_with($driver, 'pgsql') || $driver === 'postgresql' || $driver === 'postgres') { |
| 28 | + DB::statement("UPDATE channels SET sort = t.rn FROM (SELECT id, ROW_NUMBER() OVER (ORDER BY COALESCE(title_custom, title) {$direction}) AS rn FROM channels WHERE group_id = ?) t WHERE channels.id = t.id", [$record->id]); |
| 29 | + |
| 30 | + return; |
| 31 | + } |
| 32 | + |
| 33 | + // SQLite |
| 34 | + if ($driver === 'sqlite') { |
| 35 | + DB::statement("WITH ranked AS (SELECT id, ROW_NUMBER() OVER (ORDER BY COALESCE(title_custom, title) {$direction}) AS rn FROM channels WHERE group_id = ?) UPDATE channels SET sort = (SELECT rn FROM ranked WHERE ranked.id = channels.id) WHERE group_id = ?", [$record->id, $record->id]); |
| 36 | + |
| 37 | + return; |
| 38 | + } |
| 39 | + |
| 40 | + // Fallback: single CASE update |
| 41 | + $ids = $record->channels()->orderByRaw("COALESCE(title_custom, title) {$order}")->pluck('id')->all(); |
| 42 | + if (empty($ids)) { |
| 43 | + return; |
| 44 | + } |
| 45 | + |
| 46 | + $cases = []; |
| 47 | + $i = 1; |
| 48 | + foreach ($ids as $id) { |
| 49 | + $cases[] = "WHEN {$id} THEN {$i}"; |
| 50 | + $i++; |
| 51 | + } |
| 52 | + |
| 53 | + $casesSql = implode(' ', $cases); |
| 54 | + $idsSql = implode(',', $ids); |
| 55 | + |
| 56 | + DB::statement("UPDATE channels SET sort = CASE id {$casesSql} END WHERE id IN ({$idsSql})"); |
| 57 | + } |
| 58 | + |
| 59 | + /** |
| 60 | + * Bulk recount channel numbers. |
| 61 | + */ |
| 62 | + public function bulkRecountGroupChannels(Group $record, int $start = 1): void |
| 63 | + { |
| 64 | + $offset = max(0, $start - 1); |
| 65 | + $driver = DB::getPdo()->getAttribute(\PDO::ATTR_DRIVER_NAME); |
| 66 | + |
| 67 | + if ($driver === 'mysql') { |
| 68 | + DB::statement('UPDATE channels c JOIN (SELECT id, ROW_NUMBER() OVER (ORDER BY sort) AS rn FROM channels WHERE group_id = ?) t ON c.id = t.id SET c.channel = t.rn + ?', [$record->id, $offset]); |
| 69 | + |
| 70 | + return; |
| 71 | + } |
| 72 | + |
| 73 | + if (str_starts_with($driver, 'pgsql') || $driver === 'postgresql' || $driver === 'postgres') { |
| 74 | + DB::statement('UPDATE channels SET channel = t.rn + ? FROM (SELECT id, ROW_NUMBER() OVER (ORDER BY sort) AS rn FROM channels WHERE group_id = ?) t WHERE channels.id = t.id', [$offset, $record->id]); |
| 75 | + |
| 76 | + return; |
| 77 | + } |
| 78 | + |
| 79 | + if ($driver === 'sqlite') { |
| 80 | + DB::statement('WITH ranked AS (SELECT id, ROW_NUMBER() OVER (ORDER BY sort) AS rn FROM channels WHERE group_id = ?) UPDATE channels SET channel = (SELECT rn FROM ranked WHERE ranked.id = channels.id) + ? WHERE group_id = ?', [$record->id, $offset, $record->id]); |
| 81 | + |
| 82 | + return; |
| 83 | + } |
| 84 | + |
| 85 | + // Fallback: CASE update |
| 86 | + $ids = $record->channels()->orderBy('sort')->pluck('id')->all(); |
| 87 | + if (empty($ids)) { |
| 88 | + return; |
| 89 | + } |
| 90 | + |
| 91 | + $cases = []; |
| 92 | + $i = $start; |
| 93 | + foreach ($ids as $id) { |
| 94 | + $cases[] = "WHEN {$id} THEN {$i}"; |
| 95 | + $i++; |
| 96 | + } |
| 97 | + |
| 98 | + $casesSql = implode(' ', $cases); |
| 99 | + $idsSql = implode(',', $ids); |
| 100 | + |
| 101 | + DB::statement("UPDATE channels SET channel = CASE id {$casesSql} END WHERE id IN ({$idsSql})"); |
| 102 | + } |
| 103 | +} |
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