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<?php |
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/** |
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* Date: 10.05.16 |
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* |
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* @author Portey Vasil <[email protected]> |
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*/ |
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namespace Youshido\GraphQL\Relay\Connection; |
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use Youshido\GraphQL\Type\AbstractType; |
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use Youshido\GraphQL\Type\ListType\ListType; |
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use Youshido\GraphQL\Type\NonNullType; |
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use Youshido\GraphQL\Type\Object\ObjectType; |
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use Youshido\GraphQL\Type\TypeMap; |
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class Connection |
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{ |
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public static function connectionArgs() |
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{ |
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return array_merge(self::forwardArgs(), self::backwardArgs()); |
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} |
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public static function forwardArgs() |
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{ |
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return [ |
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'after' => ['type' => TypeMap::TYPE_STRING], |
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'first' => ['type' => TypeMap::TYPE_INT] |
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]; |
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} |
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public static function backwardArgs() |
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{ |
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return [ |
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'before' => ['type' => TypeMap::TYPE_STRING], |
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'last' => ['type' => TypeMap::TYPE_INT] |
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]; |
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} |
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/** |
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* @param AbstractType $type |
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* @param null|string $name |
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* @param array $config |
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* @option string edgeFields |
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* |
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* @return ObjectType |
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*/ |
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public static function edgeDefinition(AbstractType $type, $name = null, $config = []) |
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{ |
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$name = $name ?: $type->getName(); |
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$edgeFields = !empty($config['edgeFields']) ? $config['edgeFields'] : []; |
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$edgeType = new ObjectType([ |
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'name' => $name . 'Edge', |
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'description' => 'An edge in a connection.', |
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'fields' => array_merge([ |
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'node' => [ |
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'type' => $type, |
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'description' => 'The item at the end of the edge', |
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'resolve' => [__CLASS__, 'getNode'], |
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], |
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'cursor' => [ |
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'type' => TypeMap::TYPE_STRING, |
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'description' => 'A cursor for use in pagination' |
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] |
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], $edgeFields) |
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]); |
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return $edgeType; |
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} |
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/** |
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* @param AbstractType $type |
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* @param null|string $name |
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* @param array $config |
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* @option string connectionFields |
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* |
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* @return ObjectType |
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*/ |
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public static function connectionDefinition(AbstractType $type, $name = null, $config = []) |
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{ |
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$name = $name ?: $type->getName(); |
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$connectionFields = !empty($config['connectionFields']) ? $config['connectionFields'] : []; |
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$connectionType = new ObjectType([ |
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'name' => $name . 'Connection', |
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'description' => 'A connection to a list of items.', |
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'fields' => array_merge([ |
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'pageInfo' => [ |
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'type' => new NonNullType(self::getPageInfoType()), |
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'description' => 'Information to aid in pagination.', |
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'resolve' => [__CLASS__, 'getPageInfo'], |
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], |
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'edges' => [ |
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'type' => new ListType(self::edgeDefinition($type, $name, $config)), |
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'description' => 'A list of edges.', |
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'resolve' => [__CLASS__, 'getEdges'], |
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] |
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], $connectionFields) |
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]); |
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return $connectionType; |
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} |
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public static function getPageInfoType() |
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{ |
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return new ObjectType([ |
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'name' => 'PageInfo', |
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'description' => 'Information about pagination in a connection.', |
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'fields' => [ |
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'hasNextPage' => [ |
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'type' => new NonNullType(TypeMap::TYPE_BOOLEAN), |
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'description' => 'When paginating forwards, are there more items?' |
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], |
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'hasPreviousPage' => [ |
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'type' => new NonNullType(TypeMap::TYPE_BOOLEAN), |
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'description' => 'When paginating backwards, are there more items?' |
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], |
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'startCursor' => [ |
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'type' => TypeMap::TYPE_STRING, |
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'description' => 'When paginating backwards, the cursor to continue.' |
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], |
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'endCursor' => [ |
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'type' => TypeMap::TYPE_STRING, |
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'description' => 'When paginating forwards, the cursor to continue.' |
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], |
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] |
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]); |
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} |
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public static function getEdges($value) |
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{ |
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return isset($value['edges']) ? $value['edges'] : null; |
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} |
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public static function getPageInfo($value) |
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{ |
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return isset($value['pageInfo']) ? $value['pageInfo'] : null; |
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} |
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public static function getNode($value) |
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{ |
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return isset($value['node']) ? $value['node'] : null; |
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} |
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} |
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Youshido /
GraphQL
