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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Cosray; |
| 6 | |
| 7 | use Celema\Quma\Database; |
| 8 | use Cosray\Exception\RuntimeException; |
| 9 | use Cosray\References\Sync; |
| 10 | use Throwable; |
| 11 | |
| 12 | /** |
| 13 | * Write API for menus and their item trees. Reading and rendering stay |
| 14 | * in `Finder\Menu`. |
| 15 | * |
| 16 | * Item ids are generated uids by default. Explicit ids must not contain |
| 17 | * a dot: the read query builds a dotted path from them, so a dot would |
| 18 | * corrupt the tree. Item data is the `type`-discriminated jsonb payload |
| 19 | * that `Finder\MenuItem` reads; content validation stays with the |
| 20 | * caller. |
| 21 | * |
| 22 | * @api |
| 23 | */ |
| 24 | final class Menus |
| 25 | { |
| 26 | private readonly Sync $sync; |
| 27 | |
| 28 | public function __construct( |
| 29 | private readonly Database $db, |
| 30 | private readonly Uid $uid = new Uid(Uid::ALPHABET_LOWERCASE_WORD_SAFE, 13), |
| 31 | ) { |
| 32 | $this->sync = new Sync($db); |
| 33 | } |
| 34 | |
| 35 | /** |
| 36 | * @param array<string, string> $description the description per locale |
| 37 | * @param ?int $maxDepth how deep the tree may be built, null for unlimited |
| 38 | * @param ?Actor $actor who is writing; the system user when nothing says |
| 39 | */ |
| 40 | public function create( |
| 41 | string $menu, |
| 42 | array $description, |
| 43 | ?int $maxDepth = null, |
| 44 | ?Actor $actor = null, |
| 45 | ): void { |
| 46 | $usr = ($actor ?? Actor::system())->id; |
| 47 | |
| 48 | $this->db->menus->create([ |
| 49 | 'menu' => $menu, |
| 50 | 'description' => json_encode($description), |
| 51 | 'maxDepth' => $maxDepth, |
| 52 | 'creator' => $usr, |
| 53 | 'editor' => $usr, |
| 54 | ])->run(); |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * @param array<string, string> $description the description per locale |
| 59 | * @param ?int $maxDepth how deep the tree may be built, null for unlimited |
| 60 | */ |
| 61 | public function update( |
| 62 | string $menu, |
| 63 | array $description, |
| 64 | ?int $maxDepth = null, |
| 65 | ?Actor $actor = null, |
| 66 | ): void { |
| 67 | // A limit shallower than the tree would be inert: nothing rejects the |
| 68 | // levels that already exist, so refuse it instead of pretending. |
| 69 | $height = (int) $this->db->menus->menuHeight(['menu' => $menu])->one()['height']; |
| 70 | |
| 71 | if ($maxDepth !== null && $height > $maxDepth) { |
| 72 | throw new RuntimeException( |
| 73 | "Menu '{$menu}' is {$height} levels deep and cannot be limited to {$maxDepth}", |
| 74 | ); |
| 75 | } |
| 76 | |
| 77 | $this->db->menus->update([ |
| 78 | 'menu' => $menu, |
| 79 | 'description' => json_encode($description), |
| 80 | 'maxDepth' => $maxDepth, |
| 81 | 'editor' => ($actor ?? Actor::system())->id, |
| 82 | ])->run(); |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * Renames the menu's handle; the items follow through the FK cascade. |
| 87 | * Templates referencing the old handle must be updated by the caller. |
| 88 | */ |
| 89 | public function rename(string $menu, string $to): void |
| 90 | { |
| 91 | if (!$this->db->menus->exists(['menu' => $menu])->first()) { |
| 92 | throw new RuntimeException("Menu '{$menu}' does not exist"); |
| 93 | } |
| 94 | |
| 95 | $this->db->menus->rename(['menu' => $menu, 'to' => $to])->run(); |
| 96 | } |
| 97 | |
| 98 | /** Deletes the menu including all of its items. */ |
| 99 | public function delete(string $menu): void |
| 100 | { |
| 101 | foreach ($this->db->menus->deleteItems(['menu' => $menu])->all() as $row) { |
| 102 | $this->sync->remove('menu', (string) $row['item']); |
| 103 | } |
| 104 | |
| 105 | $this->db->menus->delete(['menu' => $menu])->run(); |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * Appends an item to the menu, below `parent` or at the root, and |
| 110 | * returns its id. |
| 111 | */ |
| 112 | public function add( |
| 113 | string $menu, |
| 114 | array $data, |
| 115 | ?string $parent = null, |
| 116 | ?string $item = null, |
| 117 | bool $hidden = false, |
| 118 | ?Actor $actor = null, |
| 119 | ): string { |
| 120 | if (!is_string($data['type'] ?? null) || $data['type'] === '') { |
| 121 | throw new RuntimeException('A menu item needs a type'); |
| 122 | } |
| 123 | |
| 124 | if (!$this->db->menus->exists(['menu' => $menu])->first()) { |
| 125 | throw new RuntimeException("Menu '{$menu}' does not exist"); |
| 126 | } |
| 127 | |
| 128 | if ($parent !== null && $this->itemRow($parent)['menu'] !== $menu) { |
| 129 | throw new RuntimeException( |
| 130 | "Parent item '{$parent}' belongs to another menu", |
| 131 | ); |
| 132 | } |
| 133 | |
| 134 | if ($item !== null && str_contains($item, '.')) { |
| 135 | throw new RuntimeException('A menu item id must not contain a dot'); |
| 136 | } |
| 137 | |
| 138 | // A fresh item has no children yet, so it adds exactly one level. |
| 139 | $this->assertDepth($menu, $parent, 1); |
| 140 | |
| 141 | $item ??= $this->uid->generate(); |
| 142 | $usr = ($actor ?? Actor::system())->id; |
| 143 | |
| 144 | $this->db->menus->createItem([ |
| 145 | 'item' => $item, |
| 146 | 'parent' => $parent, |
| 147 | 'menu' => $menu, |
| 148 | 'position' => $this->nextPosition($menu, $parent), |
| 149 | 'hidden' => $hidden, |
| 150 | 'data' => json_encode($data), |
| 151 | 'creator' => $usr, |
| 152 | 'editor' => $usr, |
| 153 | ])->run(); |
| 154 | $this->syncReferences($item, $data); |
| 155 | |
| 156 | return $item; |
| 157 | } |
| 158 | |
| 159 | public function updateItem( |
| 160 | string $item, |
| 161 | array $data, |
| 162 | bool $hidden = false, |
| 163 | ?Actor $actor = null, |
| 164 | ): void { |
| 165 | if (!is_string($data['type'] ?? null) || $data['type'] === '') { |
| 166 | throw new RuntimeException('A menu item needs a type'); |
| 167 | } |
| 168 | |
| 169 | $this->itemRow($item); |
| 170 | $this->db->menus->updateItem([ |
| 171 | 'item' => $item, |
| 172 | 'hidden' => $hidden, |
| 173 | 'data' => json_encode($data), |
| 174 | 'editor' => ($actor ?? Actor::system())->id, |
| 175 | ])->run(); |
| 176 | $this->syncReferences($item, $data); |
| 177 | } |
| 178 | |
| 179 | /** |
| 180 | * Moves the item below `parent` (or to the root), at `position` or |
| 181 | * appended to its new siblings. Positions are sort keys, not indexes; |
| 182 | * they may repeat, and ties order by item id. |
| 183 | */ |
| 184 | public function move(string $item, ?string $parent, ?int $position = null): void |
| 185 | { |
| 186 | $row = $this->itemRow($item); |
| 187 | $this->assertMove($item, (string) $row['menu'], $parent); |
| 188 | |
| 189 | $this->db->menus->moveItem([ |
| 190 | 'item' => $item, |
| 191 | 'parent' => $parent, |
| 192 | 'position' => $position ?? $this->nextPosition((string) $row['menu'], $parent), |
| 193 | ])->run(); |
| 194 | } |
| 195 | |
| 196 | /** |
| 197 | * Moves the item below `parent` (or to the root) to the zero-based |
| 198 | * `index` among its new siblings and renumbers the whole group 1..n, |
| 199 | * giving drag ordering exact semantics on top of `move()`'s looser |
| 200 | * sort keys. An out-of-range index clamps to the group's ends. |
| 201 | */ |
| 202 | public function place(string $item, ?string $parent, int $index): void |
| 203 | { |
| 204 | $row = $this->itemRow($item); |
| 205 | $this->assertMove($item, (string) $row['menu'], $parent); |
| 206 | |
| 207 | $siblings = array_column( |
| 208 | $this->db->menus->siblings(['menu' => $row['menu'], 'parent' => $parent])->all(), |
| 209 | 'item', |
| 210 | ); |
| 211 | $siblings = array_values(array_diff($siblings, [$item])); |
| 212 | array_splice($siblings, max(0, min($index, count($siblings))), 0, [$item]); |
| 213 | |
| 214 | $owns = !$this->db->getConn()->inTransaction(); |
| 215 | |
| 216 | if ($owns) { |
| 217 | $this->db->begin(); |
| 218 | } |
| 219 | |
| 220 | try { |
| 221 | foreach ($siblings as $offset => $sibling) { |
| 222 | $this->db->menus->moveItem([ |
| 223 | 'item' => $sibling, |
| 224 | 'parent' => $parent, |
| 225 | 'position' => $offset + 1, |
| 226 | ])->run(); |
| 227 | } |
| 228 | |
| 229 | if ($owns) { |
| 230 | $this->db->commit(); |
| 231 | } |
| 232 | } catch (Throwable $e) { |
| 233 | if ($owns) { |
| 234 | $this->db->rollback(); |
| 235 | } |
| 236 | |
| 237 | throw $e; |
| 238 | } |
| 239 | } |
| 240 | |
| 241 | /** Deletes the item including all of its descendants. */ |
| 242 | public function remove(string $item): void |
| 243 | { |
| 244 | $this->itemRow($item); |
| 245 | |
| 246 | foreach ($this->db->menus->deleteItemTree(['item' => $item])->all() as $row) { |
| 247 | $this->sync->remove('menu', (string) $row['item']); |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | /** |
| 252 | * Keeps the derived reference indexes in step with the item: its `image` |
| 253 | * icon and `asset` link target on the asset side, its linked node on the |
| 254 | * node side. Mirrors what the rebuild derives from stored menu rows, so |
| 255 | * "where is this used?" answers for menus too. |
| 256 | */ |
| 257 | private function syncReferences(string $item, array $data): void |
| 258 | { |
| 259 | $assets = []; |
| 260 | |
| 261 | foreach (['image', 'asset'] as $key) { |
| 262 | $uid = $data[$key] ?? null; |
| 263 | |
| 264 | if (is_string($uid) && $uid !== '') { |
| 265 | $assets[] = $uid; |
| 266 | } |
| 267 | } |
| 268 | |
| 269 | // `node` and `children` items both store the target's uid; legacy rows |
| 270 | // carry a numeric stub there, which the index has no use for. |
| 271 | $node = $data['node'] ?? null; |
| 272 | $nodes = is_string($node) && $node !== '' ? [$node] : []; |
| 273 | |
| 274 | $this->sync->replace('menu', $item, ['assets' => $assets, 'nodes' => $nodes]); |
| 275 | } |
| 276 | |
| 277 | /** |
| 278 | * Every precondition a move has to satisfy: the target parent belongs to |
| 279 | * the same menu, the move does not create a cycle, and the item's whole |
| 280 | * subtree still fits within the menu's `max_depth`. |
| 281 | */ |
| 282 | private function assertMove(string $item, string $menu, ?string $parent): void |
| 283 | { |
| 284 | if ($parent !== null) { |
| 285 | if ($this->itemRow($parent)['menu'] !== $menu) { |
| 286 | throw new RuntimeException( |
| 287 | "Parent item '{$parent}' belongs to another menu", |
| 288 | ); |
| 289 | } |
| 290 | |
| 291 | $ancestors = array_column( |
| 292 | $this->db->menus->ancestors(['item' => $parent])->all(), |
| 293 | 'item', |
| 294 | ); |
| 295 | |
| 296 | if (in_array($item, $ancestors, true)) { |
| 297 | throw new RuntimeException( |
| 298 | "Cannot move '{$item}' below its own descendant '{$parent}'", |
| 299 | ); |
| 300 | } |
| 301 | } |
| 302 | |
| 303 | // A move carries the item's descendants along, so the subtree's height |
| 304 | // decides whether it fits — not the item alone. |
| 305 | $this->assertDepth($menu, $parent, $this->itemHeight($item)); |
| 306 | } |
| 307 | |
| 308 | /** |
| 309 | * Rejects placing a subtree `$height` levels tall below `$parent` when |
| 310 | * that would push its deepest node past the menu's `max_depth`. |
| 311 | */ |
| 312 | private function assertDepth(string $menu, ?string $parent, int $height): void |
| 313 | { |
| 314 | $max = $this->db->menus->maxDepth(['menu' => $menu])->one()['maxDepth']; |
| 315 | |
| 316 | if ($max === null) { |
| 317 | return; |
| 318 | } |
| 319 | |
| 320 | // `ancestors` returns the parent plus everything above it, which is |
| 321 | // exactly the level the parent sits on; the root is level 0. |
| 322 | $depth = $parent === null |
| 323 | ? 0 |
| 324 | : count($this->db->menus->ancestors(['item' => $parent])->all()); |
| 325 | |
| 326 | if (($depth + $height) > (int) $max) { |
| 327 | throw new RuntimeException( |
| 328 | "Menu '{$menu}' allows only {$max} levels", |
| 329 | ); |
| 330 | } |
| 331 | } |
| 332 | |
| 333 | private function itemHeight(string $item): int |
| 334 | { |
| 335 | return (int) $this->db->menus->itemHeight(['item' => $item])->one()['height']; |
| 336 | } |
| 337 | |
| 338 | private function itemRow(string $item): array |
| 339 | { |
| 340 | $row = $this->db->menus->itemRow(['item' => $item])->first(); |
| 341 | |
| 342 | if (!$row) { |
| 343 | throw new RuntimeException("Menu item '{$item}' does not exist"); |
| 344 | } |
| 345 | |
| 346 | return $row; |
| 347 | } |
| 348 | |
| 349 | private function nextPosition(string $menu, ?string $parent): int |
| 350 | { |
| 351 | $row = $this->db->menus->maxPosition(['menu' => $menu, 'parent' => $parent])->one(); |
| 352 | |
| 353 | return (int) $row['position'] + 1; |
| 354 | } |
| 355 | } |