// Code generated by private/model/cli/gen-api/main.go. DO NOT EDIT.

package mediaconvert

import (
	"context"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/internal/awsutil"
	"github.com/aws/aws-sdk-go-v2/private/protocol"
)

// You can send list presets requests with an empty body. Optionally, you can
// filter the response by category by specifying it in your request body. You
// can also optionally specify the maximum number, up to twenty, of queues to
// be returned.
type ListPresetsInput struct {
	_ struct{} `type:"structure"`

	// Optionally, specify a preset category to limit responses to only presets
	// from that category.
	Category *string `location:"querystring" locationName:"category" type:"string"`

	// Optional. When you request a list of presets, you can choose to list them
	// alphabetically by NAME or chronologically by CREATION_DATE. If you don't
	// specify, the service will list them by name.
	ListBy PresetListBy `location:"querystring" locationName:"listBy" type:"string" enum:"true"`

	// Optional. Number of presets, up to twenty, that will be returned at one time
	MaxResults *int64 `location:"querystring" locationName:"maxResults" min:"1" type:"integer"`

	// Use this string, provided with the response to a previous request, to request
	// the next batch of presets.
	NextToken *string `location:"querystring" locationName:"nextToken" type:"string"`

	// Optional. When you request lists of resources, you can specify whether they
	// are sorted in ASCENDING or DESCENDING order. Default varies by resource.
	Order Order `location:"querystring" locationName:"order" type:"string" enum:"true"`
}

// String returns the string representation
func (s ListPresetsInput) String() string {
	return awsutil.Prettify(s)
}

// Validate inspects the fields of the type to determine if they are valid.
func (s *ListPresetsInput) Validate() error {
	invalidParams := aws.ErrInvalidParams{Context: "ListPresetsInput"}
	if s.MaxResults != nil && *s.MaxResults < 1 {
		invalidParams.Add(aws.NewErrParamMinValue("MaxResults", 1))
	}

	if invalidParams.Len() > 0 {
		return invalidParams
	}
	return nil
}

// MarshalFields encodes the AWS API shape using the passed in protocol encoder.
func (s ListPresetsInput) MarshalFields(e protocol.FieldEncoder) error {
	e.SetValue(protocol.HeaderTarget, "Content-Type", protocol.StringValue("application/json"), protocol.Metadata{})

	if s.Category != nil {
		v := *s.Category

		metadata := protocol.Metadata{}
		e.SetValue(protocol.QueryTarget, "category", protocol.QuotedValue{ValueMarshaler: protocol.StringValue(v)}, metadata)
	}
	if len(s.ListBy) > 0 {
		v := s.ListBy

		metadata := protocol.Metadata{}
		e.SetValue(protocol.QueryTarget, "listBy", protocol.QuotedValue{ValueMarshaler: v}, metadata)
	}
	if s.MaxResults != nil {
		v := *s.MaxResults

		metadata := protocol.Metadata{}
		e.SetValue(protocol.QueryTarget, "maxResults", protocol.Int64Value(v), metadata)
	}
	if s.NextToken != nil {
		v := *s.NextToken

		metadata := protocol.Metadata{}
		e.SetValue(protocol.QueryTarget, "nextToken", protocol.QuotedValue{ValueMarshaler: protocol.StringValue(v)}, metadata)
	}
	if len(s.Order) > 0 {
		v := s.Order

		metadata := protocol.Metadata{}
		e.SetValue(protocol.QueryTarget, "order", protocol.QuotedValue{ValueMarshaler: v}, metadata)
	}
	return nil
}

// Successful list presets requests return a JSON array of presets. If you don't
// specify how they are ordered, you will receive them alphabetically by name.
type ListPresetsOutput struct {
	_ struct{} `type:"structure"`

	// Use this string to request the next batch of presets.
	NextToken *string `locationName:"nextToken" type:"string"`

	// List of presets
	Presets []Preset `locationName:"presets" type:"list"`
}

// String returns the string representation
func (s ListPresetsOutput) String() string {
	return awsutil.Prettify(s)
}

// MarshalFields encodes the AWS API shape using the passed in protocol encoder.
func (s ListPresetsOutput) MarshalFields(e protocol.FieldEncoder) error {
	if s.NextToken != nil {
		v := *s.NextToken

		metadata := protocol.Metadata{}
		e.SetValue(protocol.BodyTarget, "nextToken", protocol.QuotedValue{ValueMarshaler: protocol.StringValue(v)}, metadata)
	}
	if s.Presets != nil {
		v := s.Presets

		metadata := protocol.Metadata{}
		ls0 := e.List(protocol.BodyTarget, "presets", metadata)
		ls0.Start()
		for _, v1 := range v {
			ls0.ListAddFields(v1)
		}
		ls0.End()

	}
	return nil
}

const opListPresets = "ListPresets"

// ListPresetsRequest returns a request value for making API operation for
// AWS Elemental MediaConvert.
//
// Retrieve a JSON array of up to twenty of your presets. This will return the
// presets themselves, not just a list of them. To retrieve the next twenty
// presets, use the nextToken string returned with the array.
//
//    // Example sending a request using ListPresetsRequest.
//    req := client.ListPresetsRequest(params)
//    resp, err := req.Send(context.TODO())
//    if err == nil {
//        fmt.Println(resp)
//    }
//
// Please also see https://docs.aws.amazon.com/goto/WebAPI/mediaconvert-2017-08-29/ListPresets
func (c *Client) ListPresetsRequest(input *ListPresetsInput) ListPresetsRequest {
	op := &aws.Operation{
		Name:       opListPresets,
		HTTPMethod: "GET",
		HTTPPath:   "/2017-08-29/presets",
		Paginator: &aws.Paginator{
			InputTokens:     []string{"NextToken"},
			OutputTokens:    []string{"NextToken"},
			LimitToken:      "MaxResults",
			TruncationToken: "",
		},
	}

	if input == nil {
		input = &ListPresetsInput{}
	}

	req := c.newRequest(op, input, &ListPresetsOutput{})

	return ListPresetsRequest{Request: req, Input: input, Copy: c.ListPresetsRequest}
}

// ListPresetsRequest is the request type for the
// ListPresets API operation.
type ListPresetsRequest struct {
	*aws.Request
	Input *ListPresetsInput
	Copy  func(*ListPresetsInput) ListPresetsRequest
}

// Send marshals and sends the ListPresets API request.
func (r ListPresetsRequest) Send(ctx context.Context) (*ListPresetsResponse, error) {
	r.Request.SetContext(ctx)
	err := r.Request.Send()
	if err != nil {
		return nil, err
	}

	resp := &ListPresetsResponse{
		ListPresetsOutput: r.Request.Data.(*ListPresetsOutput),
		response:          &aws.Response{Request: r.Request},
	}

	return resp, nil
}

// NewListPresetsRequestPaginator returns a paginator for ListPresets.
// Use Next method to get the next page, and CurrentPage to get the current
// response page from the paginator. Next will return false, if there are
// no more pages, or an error was encountered.
//
// Note: This operation can generate multiple requests to a service.
//
//   // Example iterating over pages.
//   req := client.ListPresetsRequest(input)
//   p := mediaconvert.NewListPresetsRequestPaginator(req)
//
//   for p.Next(context.TODO()) {
//       page := p.CurrentPage()
//   }
//
//   if err := p.Err(); err != nil {
//       return err
//   }
//
func NewListPresetsPaginator(req ListPresetsRequest) ListPresetsPaginator {
	return ListPresetsPaginator{
		Pager: aws.Pager{
			NewRequest: func(ctx context.Context) (*aws.Request, error) {
				var inCpy *ListPresetsInput
				if req.Input != nil {
					tmp := *req.Input
					inCpy = &tmp
				}

				newReq := req.Copy(inCpy)
				newReq.SetContext(ctx)
				return newReq.Request, nil
			},
		},
	}
}

// ListPresetsPaginator is used to paginate the request. This can be done by
// calling Next and CurrentPage.
type ListPresetsPaginator struct {
	aws.Pager
}

func (p *ListPresetsPaginator) CurrentPage() *ListPresetsOutput {
	return p.Pager.CurrentPage().(*ListPresetsOutput)
}

// ListPresetsResponse is the response type for the
// ListPresets API operation.
type ListPresetsResponse struct {
	*ListPresetsOutput

	response *aws.Response
}

// SDKResponseMetdata returns the response metadata for the
// ListPresets request.
func (r *ListPresetsResponse) SDKResponseMetdata() *aws.Response {
	return r.response
}