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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Cosray\Api; |
| 6 | |
| 7 | use Celema\Core\Exception\HttpBadRequest; |
| 8 | use Cosray\DateTime\Codec; |
| 9 | use Cosray\Finder\Order; |
| 10 | use Cosray\Finder\SortField; |
| 11 | |
| 12 | /** |
| 13 | * A node listing's parameters, read from a query string or from the JSON |
| 14 | * body of a query request. Both take the same names; lists are |
| 15 | * comma-separated in a query string and arrays in a body. |
| 16 | */ |
| 17 | final readonly class NodeQuery |
| 18 | { |
| 19 | public const int DEFAULT_LIMIT = 50; |
| 20 | public const int MAX_LIMIT = 1000; |
| 21 | |
| 22 | /** Builtins a client may filter and order on; the others name users or internals. */ |
| 23 | public const array BUILTINS = [ |
| 24 | 'uid', |
| 25 | 'handle', |
| 26 | 'type', |
| 27 | 'parent', |
| 28 | 'published', |
| 29 | 'hidden', |
| 30 | 'created', |
| 31 | 'changed', |
| 32 | 'routable', |
| 33 | 'renderable', |
| 34 | ]; |
| 35 | |
| 36 | /** Finder builtins that name users or internals, which clients neither filter nor order on. */ |
| 37 | private const array PRIVATE = ['creator', 'editor', 'changes', 'id', 'locked', 'deleted']; |
| 38 | |
| 39 | private const string NAME = '/^[A-Za-z][A-Za-z0-9_-]*(\.[A-Za-z0-9_-]+)*$/'; |
| 40 | private const array SORT_TYPES = ['text', 'number', 'date', 'datetime']; |
| 41 | |
| 42 | /** |
| 43 | * @param list<string> $types |
| 44 | * @param list<string> $uids |
| 45 | * @param list<string> $handles |
| 46 | * @param ?array<array-key, mixed> $filter |
| 47 | * @param non-empty-list<Order> $order |
| 48 | * @param ?list<string> $fields |
| 49 | */ |
| 50 | public function __construct( |
| 51 | public array $types = [], |
| 52 | public array $uids = [], |
| 53 | public array $handles = [], |
| 54 | public ?string $parent = null, |
| 55 | public ?bool $published = true, |
| 56 | public ?bool $hidden = false, |
| 57 | public ?bool $deleted = false, |
| 58 | public ?array $filter = null, |
| 59 | public array $order = [new Order('title'), new Order('uid')], |
| 60 | public int $limit = self::DEFAULT_LIMIT, |
| 61 | public int $offset = 0, |
| 62 | public ?array $fields = null, |
| 63 | public bool $source = false, |
| 64 | public ?SyncCursor $sync = null, |
| 65 | public bool $ordered = false, |
| 66 | ) {} |
| 67 | |
| 68 | /** @param array<array-key, mixed> $params */ |
| 69 | public static function fromQuery(array $params): self |
| 70 | { |
| 71 | $filter = $params['filter'] ?? null; |
| 72 | |
| 73 | if ($filter !== null) { |
| 74 | if (!is_string($filter)) { |
| 75 | throw self::invalid('`filter` is a JSON object.'); |
| 76 | } |
| 77 | |
| 78 | $filter = json_decode($filter, true); |
| 79 | |
| 80 | if (!is_array($filter)) { |
| 81 | throw self::invalid('`filter` is a JSON object.'); |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | return self::from($params, $filter); |
| 86 | } |
| 87 | |
| 88 | /** @param array<array-key, mixed> $body */ |
| 89 | public static function fromBody(array $body): self |
| 90 | { |
| 91 | $filter = $body['filter'] ?? null; |
| 92 | |
| 93 | if ($filter !== null && !is_array($filter)) { |
| 94 | throw self::invalid('`filter` is an object.'); |
| 95 | } |
| 96 | |
| 97 | return self::from($body, $filter); |
| 98 | } |
| 99 | |
| 100 | /** Whether the request asks for the source view. */ |
| 101 | public static function source(mixed $view): bool |
| 102 | { |
| 103 | return match ($view) { |
| 104 | null, '', 'resolved' => false, |
| 105 | 'source' => true, |
| 106 | default => throw self::invalid('`view` is `resolved` or `source`.'), |
| 107 | }; |
| 108 | } |
| 109 | |
| 110 | /** @return ?list<string> */ |
| 111 | public static function fields(mixed $fields): ?array |
| 112 | { |
| 113 | return $fields === null ? null : self::names($fields, 'fields'); |
| 114 | } |
| 115 | |
| 116 | /** A tristate filter: true, false, or `any` for both. */ |
| 117 | public static function state(mixed $value, string $name, ?bool $default): ?bool |
| 118 | { |
| 119 | return match ($value) { |
| 120 | null => $default, |
| 121 | true, 'true', '1' => true, |
| 122 | false, 'false', '0' => false, |
| 123 | 'any' => null, |
| 124 | default => throw self::invalid("`{$name}` is true, false or any."), |
| 125 | }; |
| 126 | } |
| 127 | |
| 128 | /** |
| 129 | * @param array<array-key, mixed> $params |
| 130 | * @param ?array<array-key, mixed> $filter |
| 131 | */ |
| 132 | private static function from(array $params, ?array $filter): self |
| 133 | { |
| 134 | $uids = self::list($params['uid'] ?? null, 'uid'); |
| 135 | |
| 136 | if (count($uids) > self::MAX_LIMIT) { |
| 137 | throw self::invalid('A query takes at most ' . self::MAX_LIMIT . ' uids.'); |
| 138 | } |
| 139 | |
| 140 | $parent = $params['parent'] ?? null; |
| 141 | |
| 142 | if ($parent !== null && (!is_string($parent) || trim($parent) === '')) { |
| 143 | throw self::invalid('`parent` is a node uid.'); |
| 144 | } |
| 145 | |
| 146 | $sync = self::sync($params); |
| 147 | |
| 148 | return new self( |
| 149 | types: self::list($params['type'] ?? null, 'type'), |
| 150 | uids: $uids, |
| 151 | handles: self::list($params['handle'] ?? null, 'handle'), |
| 152 | parent: $parent === null ? null : trim($parent), |
| 153 | published: self::state($params['published'] ?? null, 'published', true), |
| 154 | hidden: self::state($params['hidden'] ?? null, 'hidden', false), |
| 155 | deleted: self::state($params['deleted'] ?? null, 'deleted', false), |
| 156 | filter: $filter, |
| 157 | order: self::order($params['order'] ?? null), |
| 158 | limit: self::int( |
| 159 | $params['limit'] ?? null, |
| 160 | 'limit', |
| 161 | $uids === [] ? self::DEFAULT_LIMIT : count($uids), |
| 162 | 1, |
| 163 | self::MAX_LIMIT, |
| 164 | ), |
| 165 | offset: self::int($params['offset'] ?? null, 'offset', 0, 0, PHP_INT_MAX), |
| 166 | fields: self::fields($params['fields'] ?? null), |
| 167 | source: self::source($params['view'] ?? null), |
| 168 | sync: $sync, |
| 169 | ordered: isset($params['order']), |
| 170 | ); |
| 171 | } |
| 172 | |
| 173 | /** |
| 174 | * Terms like `-changed`, `title` or `-start:date`; a leading minus sorts |
| 175 | * descending. The node uid always breaks ties. |
| 176 | * |
| 177 | * @return non-empty-list<Order> |
| 178 | */ |
| 179 | private static function order(mixed $value): array |
| 180 | { |
| 181 | if ($value === null) { |
| 182 | return [new Order('title'), new Order('uid')]; |
| 183 | } |
| 184 | |
| 185 | $orders = []; |
| 186 | |
| 187 | foreach (self::list($value, 'order') as $term) { |
| 188 | $direction = str_starts_with($term, '-') ? 'desc' : 'asc'; |
| 189 | [$name, $type] = array_pad(explode(':', ltrim($term, '-'), 2), 2, 'text'); |
| 190 | |
| 191 | if ( |
| 192 | preg_match(self::NAME, $name) !== 1 |
| 193 | || !in_array($type, self::SORT_TYPES, true) |
| 194 | || in_array($name, self::PRIVATE, true) |
| 195 | ) { |
| 196 | throw self::invalid("`{$term}` is not an order term."); |
| 197 | } |
| 198 | |
| 199 | $orders[] = new Order(match (true) { |
| 200 | $name === 'position' => SortField::position(), |
| 201 | $type === 'number' => SortField::number($name), |
| 202 | $type === 'date' => SortField::date($name), |
| 203 | $type === 'datetime' => SortField::dateTime($name), |
| 204 | default => SortField::text($name), |
| 205 | }, $direction); |
| 206 | } |
| 207 | |
| 208 | $orders[] = new Order('uid'); |
| 209 | |
| 210 | return $orders; |
| 211 | } |
| 212 | |
| 213 | /** @return list<string> */ |
| 214 | private static function list(mixed $value, string $name): array |
| 215 | { |
| 216 | if ($value === null) { |
| 217 | return []; |
| 218 | } |
| 219 | |
| 220 | if (is_string($value)) { |
| 221 | $value = explode(',', $value); |
| 222 | } |
| 223 | |
| 224 | if (!is_array($value) || !array_is_list($value)) { |
| 225 | throw self::invalid("`{$name}` is a list."); |
| 226 | } |
| 227 | |
| 228 | $items = []; |
| 229 | |
| 230 | foreach ($value as $item) { |
| 231 | if (!is_string($item)) { |
| 232 | throw self::invalid("`{$name}` holds strings."); |
| 233 | } |
| 234 | |
| 235 | $item = trim($item); |
| 236 | |
| 237 | if ($item !== '') { |
| 238 | $items[] = $item; |
| 239 | } |
| 240 | } |
| 241 | |
| 242 | return array_values(array_unique($items)); |
| 243 | } |
| 244 | |
| 245 | /** @return list<string> */ |
| 246 | private static function names(mixed $value, string $name): array |
| 247 | { |
| 248 | $names = self::list($value, $name); |
| 249 | |
| 250 | foreach ($names as $item) { |
| 251 | if (preg_match(self::NAME, $item) !== 1) { |
| 252 | throw self::invalid("`{$item}` is not a field name."); |
| 253 | } |
| 254 | } |
| 255 | |
| 256 | return $names; |
| 257 | } |
| 258 | |
| 259 | /** |
| 260 | * `changedSince` starts a sync, `cursor` goes on with one. |
| 261 | * |
| 262 | * @param array<array-key, mixed> $params |
| 263 | */ |
| 264 | private static function sync(array $params): ?SyncCursor |
| 265 | { |
| 266 | $since = self::instant($params['changedSince'] ?? null); |
| 267 | $cursor = $params['cursor'] ?? null; |
| 268 | |
| 269 | if ($since !== null && $cursor !== null) { |
| 270 | throw self::invalid('Send `changedSince` to start a sync or `cursor` to go on with one, not both.'); |
| 271 | } |
| 272 | |
| 273 | if ($since === null && $cursor === null) { |
| 274 | return null; |
| 275 | } |
| 276 | |
| 277 | if (isset($params['order']) || isset($params['offset'])) { |
| 278 | throw self::invalid( |
| 279 | 'A sync runs in change order and goes on with `cursor`, so it takes no `order` or `offset`.', |
| 280 | ); |
| 281 | } |
| 282 | |
| 283 | return $cursor === null ? SyncCursor::since((string) $since) : SyncCursor::fromToken($cursor); |
| 284 | } |
| 285 | |
| 286 | private static function instant(mixed $value): ?string |
| 287 | { |
| 288 | if ($value === null) { |
| 289 | return null; |
| 290 | } |
| 291 | |
| 292 | return ( |
| 293 | (is_string($value) ? Codec::normalize($value) : null) |
| 294 | ?? throw self::invalid('`changedSince` is an RFC 3339 time like 2026-10-24T08:00:00Z.') |
| 295 | ); |
| 296 | } |
| 297 | |
| 298 | private static function int(mixed $value, string $name, int $default, int $min, int $max): int |
| 299 | { |
| 300 | if ($value === null) { |
| 301 | return $default; |
| 302 | } |
| 303 | |
| 304 | $int = is_int($value) ? $value : filter_var($value, FILTER_VALIDATE_INT); |
| 305 | |
| 306 | if (!is_int($int) || $int < $min || $int > $max) { |
| 307 | throw self::invalid("`{$name}` is a whole number from {$min} to {$max}."); |
| 308 | } |
| 309 | |
| 310 | return $int; |
| 311 | } |
| 312 | |
| 313 | private static function invalid(string $message): HttpBadRequest |
| 314 | { |
| 315 | return new HttpBadRequest(payload: ['message' => $message]); |
| 316 | } |
| 317 | } |