api_op_GetFaceSearch.go

// Code generated by smithy-go-codegen DO NOT EDIT.

package rekognition

import (
	"context"
	awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
	"github.com/aws/aws-sdk-go-v2/aws/signer/v4"
	"github.com/aws/aws-sdk-go-v2/service/rekognition/types"
	"github.com/awslabs/smithy-go/middleware"
	smithyhttp "github.com/awslabs/smithy-go/transport/http"
)

// Gets the face search results for Amazon Rekognition Video face search started by
// StartFaceSearch. The search returns faces in a collection that match the faces
// of persons detected in a video. It also includes the time(s) that faces are
// matched in the video. Face search in a video is an asynchronous operation. You
// start face search by calling to StartFaceSearch which returns a job identifier
// (JobId). When the search operation finishes, Amazon Rekognition Video publishes
// a completion status to the Amazon Simple Notification Service topic registered
// in the initial call to StartFaceSearch. To get the search results, first check
// that the status value published to the Amazon SNS topic is SUCCEEDED. If so,
// call GetFaceSearch and pass the job identifier (JobId) from the initial call to
// StartFaceSearch. For more information, see Searching Faces in a Collection in
// the Amazon Rekognition Developer Guide. The search results are retured in an
// array, Persons, of PersonMatch objects. EachPersonMatch element contains details
// about the matching faces in the input collection, person information (facial
// attributes, bounding boxes, and person identifer) for the matched person, and
// the time the person was matched in the video. GetFaceSearch only returns the
// default
//
// facial attributes (BoundingBox, Confidence, Landmarks, Pose, and
// Quality). The other facial attributes listed in the Face object of the following
// response syntax are not returned. For more information, see FaceDetail in the
// Amazon Rekognition Developer Guide. By default, the Persons array is sorted by
// the time, in milliseconds from the start of the video, persons are matched. You
// can also sort by persons by specifying INDEX for the SORTBY input parameter.
func (c *Client) GetFaceSearch(ctx context.Context, params *GetFaceSearchInput, optFns ...func(*Options)) (*GetFaceSearchOutput, error) {
	if params == nil {
		params = &GetFaceSearchInput{}
	}

	result, metadata, err := c.invokeOperation(ctx, "GetFaceSearch", params, optFns, addOperationGetFaceSearchMiddlewares)
	if err != nil {
		return nil, err
	}

	out := result.(*GetFaceSearchOutput)
	out.ResultMetadata = metadata
	return out, nil
}

type GetFaceSearchInput struct {

	// The job identifer for the search request. You get the job identifier from an
	// initial call to StartFaceSearch.
	//
	// This member is required.
	JobId *string

	// Maximum number of results to return per paginated call. The largest value you
	// can specify is 1000. If you specify a value greater than 1000, a maximum of 1000
	// results is returned. The default value is 1000.
	MaxResults *int32

	// If the previous response was incomplete (because there is more search results to
	// retrieve), Amazon Rekognition Video returns a pagination token in the response.
	// You can use this pagination token to retrieve the next set of search results.
	NextToken *string

	// Sort to use for grouping faces in the response. Use TIMESTAMP to group faces by
	// the time that they are recognized. Use INDEX to sort by recognized faces.
	SortBy types.FaceSearchSortBy
}

type GetFaceSearchOutput struct {

	// The current status of the face search job.
	JobStatus types.VideoJobStatus

	// If the response is truncated, Amazon Rekognition Video returns this token that
	// you can use in the subsequent request to retrieve the next set of search
	// results.
	NextToken *string

	// An array of persons, PersonMatch, in the video whose face(s) match the face(s)
	// in an Amazon Rekognition collection. It also includes time information for when
	// persons are matched in the video. You specify the input collection in an initial
	// call to StartFaceSearch. Each Persons element includes a time the person was
	// matched, face match details (FaceMatches) for matching faces in the collection,
	// and person information (Person) for the matched person.
	Persons []*types.PersonMatch

	// If the job fails, StatusMessage provides a descriptive error message.
	StatusMessage *string

	// Information about a video that Amazon Rekognition analyzed. Videometadata is
	// returned in every page of paginated responses from a Amazon Rekognition Video
	// operation.
	VideoMetadata *types.VideoMetadata

	// Metadata pertaining to the operation's result.
	ResultMetadata middleware.Metadata
}

func addOperationGetFaceSearchMiddlewares(stack *middleware.Stack, options Options) (err error) {
	err = stack.Serialize.Add(&awsAwsjson11_serializeOpGetFaceSearch{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsAwsjson11_deserializeOpGetFaceSearch{}, middleware.After)
	if err != nil {
		return err
	}
	awsmiddleware.AddRequestInvocationIDMiddleware(stack)
	smithyhttp.AddContentLengthMiddleware(stack)
	addResolveEndpointMiddleware(stack, options)
	v4.AddComputePayloadSHA256Middleware(stack)
	addRetryMiddlewares(stack, options)
	addHTTPSignerV4Middleware(stack, options)
	awsmiddleware.AddAttemptClockSkewMiddleware(stack)
	addClientUserAgent(stack)
	smithyhttp.AddErrorCloseResponseBodyMiddleware(stack)
	smithyhttp.AddCloseResponseBodyMiddleware(stack)
	addOpGetFaceSearchValidationMiddleware(stack)
	stack.Initialize.Add(newServiceMetadataMiddleware_opGetFaceSearch(options.Region), middleware.Before)
	addRequestIDRetrieverMiddleware(stack)
	addResponseErrorMiddleware(stack)
	return nil
}

func newServiceMetadataMiddleware_opGetFaceSearch(region string) awsmiddleware.RegisterServiceMetadata {
	return awsmiddleware.RegisterServiceMetadata{
		Region:        region,
		ServiceID:     ServiceID,
		SigningName:   "rekognition",
		OperationName: "GetFaceSearch",
	}
}