90 lines
1.8 KiB
Go
90 lines
1.8 KiB
Go
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package graphql
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type Payload[T any, P any] struct {
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OutermostLayer ContainerLayer[T, P]
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}
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func (q *Payload[T, P]) GetValue() T {
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if q.OutermostLayer == nil {
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var res T
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return res
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}
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layer := q.OutermostLayer
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for layer.GetInnerLayer() != nil {
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layer = layer.GetInnerLayer()
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}
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return layer.GetValue()
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}
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func NewPayload[T any, P any](gqlType string, containerLayers ...string) *Payload[T, P] {
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if len(containerLayers) == 0 {
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return &Payload[T, P]{
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OutermostLayer: NewWrapper[T, P](gqlType),
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}
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}
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var buildLayer func(index int) ContainerLayer[T, P]
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buildLayer = func(index int) ContainerLayer[T, P] {
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if index == len(containerLayers) {
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return NewWrapper[T, P](gqlType)
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}
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return &NestedLayer[T, P]{
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gqlType: containerLayers[index],
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InnerLayer: buildLayer(index + 1),
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}
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}
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return &Payload[T, P]{OutermostLayer: buildLayer(0)}
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}
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type ContainerLayer[T any, P any] interface {
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GetInnerLayer() ContainerLayer[T, P]
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GetValue() T
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GetGraphQLType() string
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}
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type NestedLayer[T any, P any] struct {
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gqlType string `graphql:"-"`
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InnerLayer ContainerLayer[T, P]
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}
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func (nl *NestedLayer[T, P]) GetInnerLayer() ContainerLayer[T, P] {
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return nl.InnerLayer
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}
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func (nl *NestedLayer[T, P]) GetValue() T {
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var res T
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return res
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}
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func (nl *NestedLayer[T, P]) GetGraphQLType() string {
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return nl.gqlType
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}
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type Wrapper[T any, P any] struct {
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gqlType string `graphql:"-"`
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Value T
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}
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func (w Wrapper[T, P]) GetInnerLayer() ContainerLayer[T, P] {
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return nil
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}
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func (w Wrapper[T, P]) GetValue() T {
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return w.Value
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}
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func (w Wrapper[T, P]) GetGraphQLWrapped() T {
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return w.Value
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}
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func (w Wrapper[T, P]) GetGraphQLType() string {
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return w.gqlType
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}
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func NewWrapper[T any, P any](gqlType string) *Wrapper[T, P] {
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return &Wrapper[T, P]{
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gqlType: gqlType,
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}
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}
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