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package mx.trackermap.TrackerMap.client.infrastructure
import io.swagger.client.infrastructure.*
import okhttp3.*
import okhttp3.HttpUrl.Companion.toHttpUrlOrNull
import okhttp3.MediaType.Companion.toMediaTypeOrNull
import java.io.File
open class ApiClient(val baseUrl: String) {
companion object {
protected const val ContentType = "Content-Type"
protected const val Accept = "Accept"
protected const val JsonMediaType = "application/json"
protected const val FormDataMediaType = "multipart/form-data"
protected const val XmlMediaType = "application/xml"
@JvmStatic
val client: OkHttpClient = OkHttpClient()
@JvmStatic
var defaultHeaders: Map<String, String> by ApplicationDelegates.setOnce(
mapOf(
ContentType to JsonMediaType,
Accept to JsonMediaType
)
)
@JvmStatic
val jsonHeaders: Map<String, String> = mapOf(ContentType to JsonMediaType, Accept to JsonMediaType)
}
protected inline fun <reified T> requestBody(content: T, mediaType: String = JsonMediaType): RequestBody =
when {
content is File -> RequestBody.create(mediaType.toMediaTypeOrNull(), content)
mediaType == FormDataMediaType -> {
var builder = FormBody.Builder()
// content's type *must* be Map<String, Any>
@Suppress("UNCHECKED_CAST")
(content as Map<String, String>).forEach { key, value ->
builder = builder.add(key, value)
}
builder.build()
}
mediaType == JsonMediaType -> RequestBody.create(
mediaType.toMediaTypeOrNull(), Serializer.moshi.adapter(T::class.java).toJson(content)
)
mediaType == XmlMediaType -> TODO("xml not currently supported.")
// TODO: this should be extended with other serializers
else -> TODO("requestBody currently only supports JSON body and File body.")
}
protected inline fun <reified T : Any?> responseBody(body: ResponseBody?, mediaType: String = JsonMediaType): T? {
if (body == null) return null
return when (mediaType) {
JsonMediaType -> Serializer.moshi.adapter(T::class.java).fromJson(body.source())
else -> TODO()
}
}
protected inline fun <reified T : Any?> request(requestConfig: RequestConfig, body: Any? = null): ApiInfrastructureResponse<T?> {
val httpUrl = baseUrl.toHttpUrlOrNull() ?: throw IllegalStateException("baseUrl is invalid.")
var urlBuilder = httpUrl.newBuilder()
.addPathSegments(requestConfig.path.trimStart('/'))
requestConfig.query.forEach { query ->
query.value.forEach { queryValue ->
urlBuilder = urlBuilder.addQueryParameter(query.key, queryValue)
}
}
val url = urlBuilder.build()
val headers = requestConfig.headers + defaultHeaders
if (headers[ContentType] ?: "" == "") {
throw kotlin.IllegalStateException("Missing Content-Type header. This is required.")
}
if (headers[Accept] ?: "" == "") {
throw kotlin.IllegalStateException("Missing Accept header. This is required.")
}
// TODO: support multiple contentType,accept options here.
val contentType = (headers[ContentType] as String).substringBefore(";").toLowerCase()
val accept = (headers[Accept] as String).substringBefore(";").toLowerCase()
var request: Request.Builder = when (requestConfig.method) {
RequestMethod.DELETE -> Request.Builder().url(url).delete()
RequestMethod.GET -> Request.Builder().url(url)
RequestMethod.HEAD -> Request.Builder().url(url).head()
RequestMethod.PATCH -> Request.Builder().url(url).patch(requestBody(body, contentType))
RequestMethod.PUT -> Request.Builder().url(url).put(requestBody(body, contentType))
RequestMethod.POST -> Request.Builder().url(url).post(requestBody(body, contentType))
RequestMethod.OPTIONS -> Request.Builder().url(url).method("OPTIONS", null)
}
headers.forEach { header -> request = request.addHeader(header.key, header.value.toString()) }
val realRequest = request.build()
val response = client.newCall(realRequest).execute()
// TODO: handle specific mapping types. e.g. Map<int, Class<?>>
when {
response.isRedirect -> return Redirection(
response.code,
response.headers.toMultimap()
)
response.isInformational -> return Informational(
response.message,
response.code,
response.headers.toMultimap()
)
response.isSuccessful -> return Success(
responseBody(response.body, accept),
response.code,
response.headers.toMultimap()
)
response.isClientError -> return ClientError(
response.body?.string(),
response.code,
response.headers.toMultimap()
)
else -> return ServerError(
null,
response.body?.string(),
response.code,
response.headers.toMultimap()
)
}
}
}
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