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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace LambdaTwelve\OneRecord\Change; |
| 6 | |
| 7 | use LambdaTwelve\OneRecord\JsonLd\Context; |
| 8 | use LambdaTwelve\OneRecord\JsonLd\ExpandedDocument; |
| 9 | use LambdaTwelve\OneRecord\JsonLd\Json; |
| 10 | use LambdaTwelve\OneRecord\JsonLd\JsonLd; |
| 11 | use LambdaTwelve\OneRecord\JsonLd\JsonLdException; |
| 12 | use LambdaTwelve\OneRecord\Rdf\BlankNode; |
| 13 | use LambdaTwelve\OneRecord\Rdf\Graph; |
| 14 | use LambdaTwelve\OneRecord\Rdf\Iri; |
| 15 | use LambdaTwelve\OneRecord\Rdf\Literal; |
| 16 | use LambdaTwelve\OneRecord\Rdf\Term; |
| 17 | use LambdaTwelve\OneRecord\Spec\Namespaces; |
| 18 | use LambdaTwelve\OneRecord\Vocabulary\Generated\Api; |
| 19 | |
| 20 | /** |
| 21 | * api:Change: the body of PATCH /logistics-objects/{id}. |
| 22 | * |
| 23 | * `revision` is the revision of the logistics object the change was written |
| 24 | * against (what the requester last saw); the holder applies it only while |
| 25 | * that is still the current revision, and the result becomes revision + 1. |
| 26 | * This is what NE:ONE enforces and what the "outdated revision" example in |
| 27 | * the spec implies (spec question 14). |
| 28 | */ |
| 29 | final readonly class Change |
| 30 | { |
| 31 | /** |
| 32 | * @param non-empty-list<Operation> $operations |
| 33 | * @param list<Iri> $verificationRequests |
| 34 | */ |
| 35 | public function __construct( |
| 36 | public Iri $logisticsObject, |
| 37 | public int $revision, |
| 38 | public array $operations, |
| 39 | public ?string $description = null, |
| 40 | public bool $notifyRequestStatusChange = false, |
| 41 | public array $verificationRequests = [], |
| 42 | ) { |
| 43 | if ($revision < 1) { |
| 44 | throw new ChangeException('A change must name the revision it applies to (1 or higher).'); |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | /** |
| 49 | * @param string|array<string, mixed>|ExpandedDocument $document |
| 50 | */ |
| 51 | public static function fromJsonLd(string|array|ExpandedDocument $document): self |
| 52 | { |
| 53 | try { |
| 54 | $expanded = $document instanceof ExpandedDocument ? $document : JsonLd::expand($document); |
| 55 | } catch (JsonLdException $e) { |
| 56 | throw ChangeException::because('Invalid body request', $e->getMessage()); |
| 57 | } |
| 58 | $graph = $expanded->graph; |
| 59 | $root = $expanded->root; |
| 60 | if (!\in_array(Api::Change, $expanded->rootTypes(), true)) { |
| 61 | throw ChangeException::because('Invalid resource', 'The body is not an api:Change.'); |
| 62 | } |
| 63 | |
| 64 | $target = $graph->firstObject($root, Api::hasLogisticsObject); |
| 65 | if (!$target instanceof Iri) { |
| 66 | throw ChangeException::because('Invalid resource', 'api:hasLogisticsObject must reference the logistics object by IRI.', Api::hasLogisticsObject); |
| 67 | } |
| 68 | $revisionTerm = $graph->firstObject($root, Api::hasRevision); |
| 69 | if (!$revisionTerm instanceof Literal || preg_match('/^\+?\d+$/', $revisionTerm->lexical) !== 1 || (int) $revisionTerm->lexical < 1) { |
| 70 | throw ChangeException::because('Invalid resource', 'api:hasRevision must be a positive integer.', Api::hasRevision); |
| 71 | } |
| 72 | $description = $graph->firstObject($root, Api::hasDescription); |
| 73 | $notify = $graph->firstObject($root, Api::notifyRequestStatusChange); |
| 74 | $verifications = []; |
| 75 | foreach ($graph->objects($root, Api::hasVerificationRequest) as $term) { |
| 76 | if ($term instanceof Iri) { |
| 77 | $verifications[] = $term; |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | $operations = []; |
| 82 | foreach ($graph->objects($root, Api::hasOperation) as $node) { |
| 83 | if (!$node instanceof Iri && !$node instanceof BlankNode) { |
| 84 | throw ChangeException::because('Invalid resource', 'api:hasOperation must contain api:Operation objects.', Api::hasOperation); |
| 85 | } |
| 86 | foreach (self::operationsFrom($graph, $node) as $operation) { |
| 87 | $operations[] = $operation; |
| 88 | } |
| 89 | } |
| 90 | if ($operations === []) { |
| 91 | throw ChangeException::because('Invalid resource', 'A change must contain at least one operation.', Api::hasOperation); |
| 92 | } |
| 93 | |
| 94 | return new self( |
| 95 | $target, |
| 96 | (int) $revisionTerm->lexical, |
| 97 | $operations, |
| 98 | $description instanceof Literal ? $description->lexical : null, |
| 99 | $notify instanceof Literal && $notify->lexical === 'true', |
| 100 | $verifications, |
| 101 | ); |
| 102 | } |
| 103 | |
| 104 | /** |
| 105 | * @return array<string, mixed> |
| 106 | */ |
| 107 | public function toJsonLd(): array |
| 108 | { |
| 109 | $operations = []; |
| 110 | foreach ($this->operations as $operation) { |
| 111 | $operations[] = [ |
| 112 | '@type' => 'api:Operation', |
| 113 | 'api:op' => ['@id' => 'api:' . ($operation->kind === OperationKind::Add ? 'ADD' : 'DELETE')], |
| 114 | 'api:s' => $operation->subjectString(), |
| 115 | 'api:p' => $operation->predicate->value, |
| 116 | 'api:o' => [[ |
| 117 | '@type' => 'api:OperationObject', |
| 118 | 'api:hasDatatype' => $operation->object->datatype, |
| 119 | 'api:hasValue' => $operation->object->value, |
| 120 | ]], |
| 121 | ]; |
| 122 | } |
| 123 | $document = [ |
| 124 | '@context' => [ |
| 125 | 'cargo' => Namespaces::CARGO, |
| 126 | 'api' => Namespaces::API, |
| 127 | 'xsd' => Namespaces::XSD, |
| 128 | 'api:hasDatatype' => ['@type' => 'xsd:anyURI'], |
| 129 | 'api:p' => ['@type' => 'xsd:anyURI'], |
| 130 | ], |
| 131 | '@type' => 'api:Change', |
| 132 | 'api:hasLogisticsObject' => ['@id' => $this->logisticsObject->value], |
| 133 | ]; |
| 134 | if ($this->description !== null) { |
| 135 | $document['api:hasDescription'] = $this->description; |
| 136 | } |
| 137 | $document['api:hasOperation'] = $operations; |
| 138 | $document['api:hasRevision'] = ['@type' => 'xsd:positiveInteger', '@value' => (string) $this->revision]; |
| 139 | if ($this->notifyRequestStatusChange) { |
| 140 | $document['api:notifyRequestStatusChange'] = true; |
| 141 | } |
| 142 | if ($this->verificationRequests !== []) { |
| 143 | $document['api:hasVerificationRequest'] = array_map(static fn(Iri $iri): array => ['@id' => $iri->value], $this->verificationRequests); |
| 144 | } |
| 145 | |
| 146 | return $document; |
| 147 | } |
| 148 | |
| 149 | public function toJson(bool $pretty = true): string |
| 150 | { |
| 151 | return Json::encode($this->toJsonLd(), $pretty); |
| 152 | } |
| 153 | |
| 154 | public static function context(): Context |
| 155 | { |
| 156 | return Context::fromRaw((new self(new Iri('https://example.invalid/x'), 1, [Operation::add(new Iri('https://example.invalid/x'), new Iri(Namespaces::CARGO . 'x'), new OperationObject(Literal::XSD_STRING, ''))]))->toJsonLd()['@context']); |
| 157 | } |
| 158 | |
| 159 | /** |
| 160 | * @return list<string> the property IRIs this change touches on the logistics object itself |
| 161 | */ |
| 162 | public function changedProperties(): array |
| 163 | { |
| 164 | $properties = []; |
| 165 | foreach ($this->operations as $operation) { |
| 166 | if ($operation->subject->equals($this->logisticsObject)) { |
| 167 | $properties[$operation->predicate->value] = true; |
| 168 | } |
| 169 | } |
| 170 | $list = array_keys($properties); |
| 171 | sort($list, SORT_STRING); |
| 172 | |
| 173 | return $list; |
| 174 | } |
| 175 | |
| 176 | /** |
| 177 | * @return list<Operation> |
| 178 | */ |
| 179 | private static function operationsFrom(Graph $graph, Iri|BlankNode $node): array |
| 180 | { |
| 181 | $kindTerm = $graph->firstObject($node, Api::op); |
| 182 | $kind = $kindTerm instanceof Iri ? OperationKind::tryFrom($kindTerm->value) : null; |
| 183 | if ($kind === null) { |
| 184 | throw ChangeException::because('Invalid resource', 'api:op must be api:ADD or api:DELETE.', Api::op); |
| 185 | } |
| 186 | $subject = self::nodeFrom($graph->firstObject($node, Api::s), Api::s); |
| 187 | $predicateTerm = $graph->firstObject($node, Api::p); |
| 188 | $predicate = match (true) { |
| 189 | $predicateTerm instanceof Iri => $predicateTerm, |
| 190 | $predicateTerm instanceof Literal && Context::isAbsoluteIri($predicateTerm->lexical) => new Iri($predicateTerm->lexical), |
| 191 | default => throw ChangeException::because('Invalid resource', 'api:p must be the IRI of a property.', Api::p), |
| 192 | }; |
| 193 | |
| 194 | $objects = $graph->objects($node, Api::o); |
| 195 | if ($objects === []) { |
| 196 | throw ChangeException::because('Invalid resource', 'An operation needs an api:o object.', Api::o); |
| 197 | } |
| 198 | $operations = []; |
| 199 | foreach ($objects as $objectNode) { |
| 200 | if (!$objectNode instanceof Iri && !$objectNode instanceof BlankNode) { |
| 201 | throw ChangeException::because('Invalid resource', 'api:o must be an api:OperationObject.', Api::o); |
| 202 | } |
| 203 | $datatype = $graph->firstObject($objectNode, Api::hasDatatype); |
| 204 | $value = $graph->firstObject($objectNode, Api::hasValue); |
| 205 | $datatypeIri = match (true) { |
| 206 | $datatype instanceof Iri => $datatype->value, |
| 207 | $datatype instanceof Literal && Context::isAbsoluteIri($datatype->lexical) => $datatype->lexical, |
| 208 | default => throw ChangeException::because('Invalid resource', 'api:hasDatatype must be an IRI.', Api::hasDatatype), |
| 209 | }; |
| 210 | $valueString = match (true) { |
| 211 | $value instanceof Literal => $value->lexical, |
| 212 | $value instanceof Iri => $value->value, |
| 213 | default => throw ChangeException::because('Invalid resource', 'api:hasValue is required.', Api::hasValue), |
| 214 | }; |
| 215 | $operations[] = new Operation($kind, $subject, $predicate, new OperationObject($datatypeIri, $valueString)); |
| 216 | } |
| 217 | |
| 218 | return $operations; |
| 219 | } |
| 220 | |
| 221 | private static function nodeFrom(?Term $term, string $property): Iri|BlankNode |
| 222 | { |
| 223 | if ($term instanceof Iri) { |
| 224 | return $term; |
| 225 | } |
| 226 | if ($term instanceof BlankNode) { |
| 227 | return $term; |
| 228 | } |
| 229 | if ($term instanceof Literal) { |
| 230 | if (str_starts_with($term->lexical, '_:') && \strlen($term->lexical) > 2) { |
| 231 | return new BlankNode(substr($term->lexical, 2)); |
| 232 | } |
| 233 | if (Context::isAbsoluteIri($term->lexical)) { |
| 234 | return new Iri($term->lexical); |
| 235 | } |
| 236 | } |
| 237 | |
| 238 | throw ChangeException::because('Invalid resource', 'api:s must be the IRI of the logistics object, an embedded object id, or a blank node label.', $property); |
| 239 | } |
| 240 | } |