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<?php |
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namespace DNADesign\Elemental\GraphQL; |
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use DNADesign\Elemental\Models\BaseElement; |
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use DNADesign\Elemental\Models\ElementalArea; |
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use DNADesign\Elemental\Services\ReorderElements; |
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use GraphQL\Type\Definition\ResolveInfo; |
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use GraphQL\Type\Definition\Type; |
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use InvalidArgumentException; |
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use SilverStripe\Core\Injector\Injector; |
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use SilverStripe\GraphQL\MutationCreator; |
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use SilverStripe\GraphQL\OperationResolver; |
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use SilverStripe\GraphQL\Scaffolding\StaticSchema; |
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class AddElementToAreaMutation extends MutationCreator implements OperationResolver |
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{ |
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public function attributes() |
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{ |
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return [ |
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'name' => 'addElementToArea', |
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'description' => 'Adds an Element to an ElementalArea, optionally after another Element' |
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]; |
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} |
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public function type() |
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{ |
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return $this->manager->getType(StaticSchema::inst()->typeNameForDataObject(BaseElement::class)); |
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} |
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public function args() |
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{ |
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return [ |
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'ClassName' => ['type' => Type::nonNull(Type::string())], |
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'ElementalAreaID' => ['type' => Type::nonNull(Type::id())], |
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'AfterElementID' => ['type' => Type::id()], |
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]; |
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} |
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public function resolve($object, array $args, $context, ResolveInfo $info) |
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{ |
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$elementClass = $args['ClassName']; |
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$elementalAreaID = $args['ElementalAreaID']; |
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$afterElementID = isset($args['AfterElementID']) ? $args['AfterElementID'] : null; |
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if (!is_subclass_of($elementClass, BaseElement::class)) { |
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throw new InvalidArgumentException("$elementClass is not a subclass of " . BaseElement::class); |
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} |
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$elementalArea = ElementalArea::get()->byID($elementalAreaID); |
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if (!$elementalArea) { |
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throw new InvalidArgumentException("Invalid ElementalAreaID: $elementalAreaID"); |
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} |
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if (!$elementalArea->canEdit($context['currentUser'])) { |
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throw new InvalidArgumentException("The current user has insufficient permission to edit ElementalAreas"); |
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} |
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/** @var BaseElement $newElement */ |
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$newElement = Injector::inst()->create($elementClass); |
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if (!$newElement->canEdit($context['currentUser'])) { |
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throw new InvalidArgumentException( |
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'The current user has insufficient permission to edit Elements' |
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); |
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} |
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// Assign the parent ID directly rather than via HasManyList to prevent multiple writes. |
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// See BaseElement::$has_one for the "Parent" naming. |
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$newElement->ParentID = $elementalArea->ID; |
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// Ensure that a sort order is assigned - see BaseElement::onBeforeWrite() |
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$newElement->onBeforeWrite(); |
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if ($afterElementID !== null) { |
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/** @var ReorderElements $reorderer */ |
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$reorderer = Injector::inst()->create(ReorderElements::class, $newElement); |
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$reorderer->reorder($afterElementID); // also writes the element |
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} else { |
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$newElement->write(); |
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} |
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return $newElement; |
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} |
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} |
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