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Update DynamoDB.Decoder to handle binary strings #61

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Update DynamoDB.Decoder to handle binary strings #61

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c1ab3b5
Update DynamoDB.Decoder to handle binary strings
cromulentlabs Aug 12, 2024
8fe09b2
allow for decoding empty arrays in DynamoDBEvent
cromulentlabs Sep 12, 2024
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13 changes: 10 additions & 3 deletions Sources/AWSLambdaEvents/DynamoDB.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,7 @@ import struct Foundation.Date
#else
@preconcurrency import struct Foundation.Date
#endif
import struct Foundation.Data

// https://docs.aws.amazon.com/lambda/latest/dg/with-ddb.html
public struct DynamoDBEvent: Decodable, Sendable {
Expand Down Expand Up @@ -506,6 +507,9 @@ extension DynamoDBEvent {

func decode<T>(_ type: T.Type, forKey key: K) throws -> T where T: Decodable {
let decoder = try self.decoderForKey(key)
if case .list(let list) = decoder.value, list.isEmpty {
return [] as! T
}
return try T(from: decoder)
}

Expand Down Expand Up @@ -619,11 +623,14 @@ extension DynamoDBEvent {
}

func decode(_: String.Type) throws -> String {
guard case .string(let string) = self.value else {
switch self.value {
case .string(let string):
return string
case .binary(let binary):
return Data(binary).base64EncodedString()
default:
throw self.createTypeMismatchError(type: String.self, value: self.value)
}

return string
}

func decode(_: Double.Type) throws -> Double {
Expand Down