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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Cosray\Finder; |
| 6 | |
| 7 | use Cosray\Cms; |
| 8 | use Cosray\Context; |
| 9 | use Cosray\Exception\RuntimeException; |
| 10 | use Iterator; |
| 11 | |
| 12 | class Menu implements Iterator |
| 13 | { |
| 14 | /** The `order` values a `children` item may configure. */ |
| 15 | public const array CHILD_ORDERS = ['title', 'created', 'created desc', 'changed desc']; |
| 16 | |
| 17 | protected array $items; |
| 18 | protected int $pointer = 0; |
| 19 | |
| 20 | /** |
| 21 | * `$expand` resolves dynamic `children` items into node entries at |
| 22 | * read time; the panel editor turns it off to show the items as |
| 23 | * stored. Expansion needs the `$cms` finder entry point — without |
| 24 | * one, `children` items render as nothing. |
| 25 | * |
| 26 | * `$hidden` includes hidden items; the panel editor asks for them so |
| 27 | * it can show what the site does not. |
| 28 | */ |
| 29 | public function __construct( |
| 30 | protected readonly Context $context, |
| 31 | string $menu, |
| 32 | protected readonly ?Cms $cms = null, |
| 33 | bool $expand = true, |
| 34 | bool $hidden = false, |
| 35 | ) { |
| 36 | $rows = $context->db->menus->get(['menu' => $menu])->all(); |
| 37 | |
| 38 | if (!$hidden) { |
| 39 | // Dropping the row is enough to drop its subtree: `makeTree` nests |
| 40 | // by parent, so children of a hidden item find no group to join. |
| 41 | $rows = array_values(array_filter( |
| 42 | $rows, |
| 43 | static fn(array $row): bool => !$row['hidden'], |
| 44 | )); |
| 45 | } |
| 46 | |
| 47 | $this->items = $this->makeTree($rows); |
| 48 | |
| 49 | // An existing menu without items iterates nothing and renders as |
| 50 | // an empty string; only an unknown menu is an error. |
| 51 | if ( |
| 52 | count($this->items) === 0 |
| 53 | && !$context->db->menus->exists(['menu' => $menu])->first() |
| 54 | ) { |
| 55 | throw new RuntimeException("Menu '{$menu}' not found"); |
| 56 | } |
| 57 | |
| 58 | if ($expand) { |
| 59 | $this->items = $this->expand($this->items); |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | public function rewind(): void |
| 64 | { |
| 65 | reset($this->items); |
| 66 | } |
| 67 | |
| 68 | public function current(): MenuItem |
| 69 | { |
| 70 | return new MenuItem($this->context, current($this->items)); |
| 71 | } |
| 72 | |
| 73 | public function key(): string |
| 74 | { |
| 75 | return key($this->items); |
| 76 | } |
| 77 | |
| 78 | public function next(): void |
| 79 | { |
| 80 | next($this->items); |
| 81 | } |
| 82 | |
| 83 | public function valid(): bool |
| 84 | { |
| 85 | return key($this->items) !== null; |
| 86 | } |
| 87 | |
| 88 | public function html(string $class = '', string $tag = 'nav'): string |
| 89 | { |
| 90 | return $this->compileHtml($this, $class, $tag); |
| 91 | } |
| 92 | |
| 93 | protected function compileHtml( |
| 94 | Iterator $items, |
| 95 | string $class = '', |
| 96 | string $tag = 'nav', |
| 97 | ): string { |
| 98 | $out = ''; |
| 99 | $level = 1; |
| 100 | |
| 101 | foreach ($items as $item) { |
| 102 | $level = $item->level(); |
| 103 | $itemClass = $item->class(); |
| 104 | $image = $item->image() ?: ''; |
| 105 | |
| 106 | if ($image) { |
| 107 | $image = sprintf( |
| 108 | '<div class="nav-image"><img src="%s" alt="Navigation Icon"/></div>', |
| 109 | $this->escape($image), |
| 110 | ); |
| 111 | } |
| 112 | |
| 113 | $submenu = $this->compileHtml($item->children(), tag: ''); |
| 114 | |
| 115 | if ($submenu) { |
| 116 | $submenu = sprintf('<div class="nav-submenu">%s</div>', $submenu); |
| 117 | } |
| 118 | |
| 119 | $content = sprintf( |
| 120 | '%s<div class="nav-label"><span>%s</span></div>%s', |
| 121 | $image, |
| 122 | $this->escape($item->title()), |
| 123 | $submenu, |
| 124 | ); |
| 125 | $href = $item->href(); |
| 126 | |
| 127 | if ($href !== null) { |
| 128 | $content = sprintf('<a%s>%s</a>', $this->anchorAttributes($item, $href), $content); |
| 129 | } |
| 130 | |
| 131 | $out .= sprintf( |
| 132 | '<li class="nav-level-%s%s%s">%s</li>', |
| 133 | (string) $level, |
| 134 | $item->hasChildren() ? ' nav-has-children' : '', |
| 135 | $itemClass ? ' ' . $this->escape($itemClass) : '', |
| 136 | $content, |
| 137 | ); |
| 138 | } |
| 139 | |
| 140 | if ($out === '') { |
| 141 | return ''; |
| 142 | } |
| 143 | |
| 144 | if ($tag) { |
| 145 | return sprintf( |
| 146 | '<%s%s><ul class="nav-level-%s">%s</ul></%s>', |
| 147 | $tag, |
| 148 | $class ? sprintf(' class="%s"', $this->escape($class)) : '', |
| 149 | $level, |
| 150 | $out, |
| 151 | $tag, |
| 152 | ); |
| 153 | } |
| 154 | |
| 155 | return sprintf( |
| 156 | '<ul class="%snav-level-%s">%s</ul>', |
| 157 | $class ? $this->escape($class) . ' ' : '', |
| 158 | $level, |
| 159 | $out, |
| 160 | ); |
| 161 | } |
| 162 | |
| 163 | protected function anchorAttributes(MenuItem $item, string $href): string |
| 164 | { |
| 165 | $attributes = sprintf(' href="%s"', $this->escape($href)); |
| 166 | $target = $item->target(); |
| 167 | |
| 168 | if ($target !== null) { |
| 169 | $attributes .= sprintf(' target="%s"', $this->escape($target)); |
| 170 | |
| 171 | if ($target === '_blank') { |
| 172 | $attributes .= ' rel="noopener"'; |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | return $attributes; |
| 177 | } |
| 178 | |
| 179 | protected function escape(string $value): string |
| 180 | { |
| 181 | return htmlspecialchars($value, ENT_QUOTES); |
| 182 | } |
| 183 | |
| 184 | /** |
| 185 | * Nests the sorted rows by their parent column. Splitting the CTE's |
| 186 | * dotted path would duplicate items whose ids contain a dot. |
| 187 | */ |
| 188 | protected function makeTree(array $items): array |
| 189 | { |
| 190 | $grouped = []; |
| 191 | |
| 192 | foreach ($items as $item) { |
| 193 | $grouped[$item['parent'] ?? ''][$item['item']] = $item; |
| 194 | } |
| 195 | |
| 196 | return $this->branch($grouped, ''); |
| 197 | } |
| 198 | |
| 199 | private function branch(array $grouped, string $parent): array |
| 200 | { |
| 201 | $tree = []; |
| 202 | |
| 203 | foreach ($grouped[$parent] ?? [] as $id => $item) { |
| 204 | $item['children'] = $this->branch($grouped, $id); |
| 205 | $tree[$id] = $item; |
| 206 | } |
| 207 | |
| 208 | return $tree; |
| 209 | } |
| 210 | |
| 211 | /** |
| 212 | * Replaces every `children` item in place with the linked node's |
| 213 | * published, visible children, `levels` deep and in the configured |
| 214 | * order. The entries are synthesized as `node` rows carrying their |
| 215 | * resolved title and path for the current locale, so rendering |
| 216 | * treats them exactly like hand-placed node items. |
| 217 | */ |
| 218 | protected function expand(array $items): array |
| 219 | { |
| 220 | $result = []; |
| 221 | |
| 222 | foreach ($items as $id => $item) { |
| 223 | $data = json_decode((string) $item['data'], true); |
| 224 | $data = is_array($data) ? $data : []; |
| 225 | |
| 226 | if (($data['type'] ?? '') === 'children') { |
| 227 | $result += $this->childRows($data, (int) $item['level']); |
| 228 | |
| 229 | continue; |
| 230 | } |
| 231 | |
| 232 | $item['children'] = $this->expand($item['children']); |
| 233 | $result[$id] = $item; |
| 234 | } |
| 235 | |
| 236 | return $result; |
| 237 | } |
| 238 | |
| 239 | /** @return array<string, array> */ |
| 240 | private function childRows(array $data, int $level): array |
| 241 | { |
| 242 | $uid = $data['node'] ?? null; |
| 243 | |
| 244 | if ($this->cms === null || !is_string($uid) || $uid === '') { |
| 245 | return []; |
| 246 | } |
| 247 | |
| 248 | $order = $data['order'] ?? ''; |
| 249 | $order = in_array($order, self::CHILD_ORDERS, true) ? $order : 'title'; |
| 250 | |
| 251 | return $this->nodeRows($uid, $level, max(1, (int) ($data['levels'] ?? 1)), $order); |
| 252 | } |
| 253 | |
| 254 | /** @return array<string, array> */ |
| 255 | private function nodeRows(string $uid, int $level, int $depth, string $order): array |
| 256 | { |
| 257 | assert($this->cms !== null, 'childRows guards the finder entry point'); |
| 258 | $locale = $this->context->locale()->id; |
| 259 | $rows = []; |
| 260 | |
| 261 | // The uid tie-break keeps equal sort keys deterministic. |
| 262 | foreach ($this->cms->nodes()->childrenOf($uid)->order($order, 'id') as $node) { |
| 263 | $childUid = (string) $node->meta->uid; |
| 264 | $key = 'children:' . $childUid; |
| 265 | |
| 266 | $rows[$key] = [ |
| 267 | 'item' => $key, |
| 268 | 'parent' => null, |
| 269 | 'level' => $level, |
| 270 | 'data' => json_encode([ |
| 271 | 'type' => 'node', |
| 272 | 'node' => $childUid, |
| 273 | 'title' => [$locale => $node->title()], |
| 274 | 'path' => [$locale => $node->path()], |
| 275 | ]), |
| 276 | 'children' => $depth > 1 |
| 277 | ? $this->nodeRows($childUid, $level + 1, $depth - 1, $order) |
| 278 | : [], |
| 279 | ]; |
| 280 | } |
| 281 | |
| 282 | return $rows; |
| 283 | } |
| 284 | } |