1package attributevalue
2
3import (
4	"fmt"
5
6	ddb "github.com/aws/aws-sdk-go-v2/service/dynamodb/types"
7	streams "github.com/aws/aws-sdk-go-v2/service/dynamodbstreams/types"
8)
9
10// FromDynamoDBStreamsMap converts a map of Amazon DynamoDB Streams
11// AttributeValues, and all nested members.
12func FromDynamoDBStreamsMap(from map[string]streams.AttributeValue) (to map[string]ddb.AttributeValue, err error) {
13	to = make(map[string]ddb.AttributeValue, len(from))
14	for field, value := range from {
15		to[field], err = FromDynamoDBStreams(value)
16		if err != nil {
17			return nil, err
18		}
19	}
20
21	return to, nil
22}
23
24// FromDynamoDBStreamsList converts a slice of Amazon DynamoDB Streams
25// AttributeValues, and all nested members.
26func FromDynamoDBStreamsList(from []streams.AttributeValue) (to []ddb.AttributeValue, err error) {
27	to = make([]ddb.AttributeValue, len(from))
28	for i := 0; i < len(from); i++ {
29		to[i], err = FromDynamoDBStreams(from[i])
30		if err != nil {
31			return nil, err
32		}
33	}
34
35	return to, nil
36}
37
38// FromDynamoDBStreams converts an Amazon DynamoDB Streams AttributeValue, and
39// all nested members.
40func FromDynamoDBStreams(from streams.AttributeValue) (ddb.AttributeValue, error) {
41	switch tv := from.(type) {
42	case *streams.AttributeValueMemberNULL:
43		return &ddb.AttributeValueMemberNULL{Value: tv.Value}, nil
44
45	case *streams.AttributeValueMemberBOOL:
46		return &ddb.AttributeValueMemberBOOL{Value: tv.Value}, nil
47
48	case *streams.AttributeValueMemberB:
49		return &ddb.AttributeValueMemberB{Value: tv.Value}, nil
50
51	case *streams.AttributeValueMemberBS:
52		bs := make([][]byte, len(tv.Value))
53		for i := 0; i < len(tv.Value); i++ {
54			bs[i] = append([]byte{}, tv.Value[i]...)
55		}
56		return &ddb.AttributeValueMemberBS{Value: bs}, nil
57
58	case *streams.AttributeValueMemberN:
59		return &ddb.AttributeValueMemberN{Value: tv.Value}, nil
60
61	case *streams.AttributeValueMemberNS:
62		return &ddb.AttributeValueMemberNS{Value: append([]string{}, tv.Value...)}, nil
63
64	case *streams.AttributeValueMemberS:
65		return &ddb.AttributeValueMemberS{Value: tv.Value}, nil
66
67	case *streams.AttributeValueMemberSS:
68		return &ddb.AttributeValueMemberSS{Value: append([]string{}, tv.Value...)}, nil
69
70	case *streams.AttributeValueMemberL:
71		values, err := FromDynamoDBStreamsList(tv.Value)
72		if err != nil {
73			return nil, err
74		}
75		return &ddb.AttributeValueMemberL{Value: values}, nil
76
77	case *streams.AttributeValueMemberM:
78		values, err := FromDynamoDBStreamsMap(tv.Value)
79		if err != nil {
80			return nil, err
81		}
82		return &ddb.AttributeValueMemberM{Value: values}, nil
83
84	default:
85		return nil, fmt.Errorf("unknown AttributeValue union member, %T", from)
86	}
87}
88