com.baulsupp.oksocial.services.transferwise.TransferwiseAuthFlow.kt Maven / Gradle / Ivy

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package com.baulsupp.oksocial.services.transferwise

import com.baulsupp.oksocial.authenticator.SimpleWebServer
import com.baulsupp.oksocial.authenticator.oauth2.Oauth2Token
import com.baulsupp.oksocial.credentials.NoToken
import com.baulsupp.oksocial.kotlin.queryMap
import com.baulsupp.oksocial.kotlin.requestBuilder
import com.baulsupp.oksocial.output.OutputHandler
import okhttp3.Credentials
import okhttp3.FormBody
import okhttp3.OkHttpClient
import okhttp3.Response

object TransferwiseAuthFlow {
  suspend fun login(
    client: OkHttpClient,
    outputHandler: OutputHandler,
    host: String,
    clientId: String,
    clientSecret: String
  ): Oauth2Token {
    SimpleWebServer.forCode().use { s ->
      val serverUri = s.redirectUri

      val loginUrl = "https://$host/oauth/authorize?client_id=$clientId&response_type=code&scope=transfers&redirect_uri=$serverUri"

      outputHandler.openLink(loginUrl)

      val code = s.waitForCode()

      val body = FormBody.Builder().add("client_id", clientId).add("redirect_uri", serverUri)
        .add("grant_type", "authorization_code").add("code", code).build()
      val basic = Credentials.basic(clientId, clientSecret)
      val request = requestBuilder("https://$host/oauth/token",
        NoToken)
        .post(body)
        .header("Authorization", basic)
        .build()

      val responseMap = client.queryMap(request)

      return Oauth2Token(responseMap["access_token"] as String,
        responseMap["refresh_token"] as String, clientId, clientSecret)
    }
  }
}