IntOrString

IntOrString-example.swift

import Foundation

enum IntOrString: Encodable {
  case integer(Int)
  case string(String)

  func encode(to encoder: Encoder) throws {
    var container = encoder.singleValueContainer()
    switch self {
    case .integer(let val): try container.encode(val)
    case .string(let val): try container.encode(val)
    }
  }
}

struct Filter: Encodable {
  let field: String
  let operation: String
  let value: IntOrString
}

struct APIRequestBody: Encodable {
  let filters: [Filter]
}

let requestBody = APIRequestBody(filters:
  [
    Filter(field: "handle", operation: "equal", value: .string("cweinberger")),
    Filter(field: "age", operation: "lessThan", value: .integer(35))
  ]
)

let jsonEncoder = JSONEncoder()
jsonEncoder.outputFormatting = .prettyPrinted
let jsonData = try jsonEncoder.encode(requestBody)
print(String(data: jsonData, encoding: .utf8)!)

/*
prints:

{
  "filters" : [
    {
      "field" : "handle",
      "operation" : "equal",
      "value" : "cweinberger"
    },
    {
      "field" : "age",
      "operation" : "lessThan",
      "value" : 35
    }
  ]
}

*/