Deferred Deep Linking

// Call checkDeferredDeepLink() from Application.onCreate()
// Gradle: implementation("com.android.installreferrer:installreferrer:2.2")

private const val APP_CONFIG_ID = "YOUR_APP_CONFIG_ID"
private const val YLNK_QUERY_URL = "https://api.ylnk.cc/v2/deeplink/query"

fun checkDeferredDeepLink(context: Context) {
    val referrerClient = InstallReferrerClient.newBuilder(context).build()
    referrerClient.startConnection(object : InstallReferrerStateListener {
        override fun onInstallReferrerSetupFinished(responseCode: Int) {
            var clickId: String? = null
            if (responseCode == InstallReferrerClient.InstallReferrerResponse.OK) {
                val referrer = referrerClient.installReferrer.installReferrer
                clickId = Uri.parse("?$referrer").getQueryParameter("click_id")
            }
            referrerClient.endConnection()
            CoroutineScope(Dispatchers.IO).launch { queryYlnk(context, clickId) }
        }
        override fun onInstallReferrerServiceDisconnected() {
            CoroutineScope(Dispatchers.IO).launch { queryYlnk(context, null) }
        }
    })
}

// Call checkDeferredDeepLink() from:
// application(_:didFinishLaunchingWithOptions:)

private let APP_CONFIG_ID = "YOUR_APP_CONFIG_ID"
private let YLNK_QUERY_URL = "https://api.ylnk.cc/v2/deeplink/query"

func checkDeferredDeepLink() {
    let timezone = TimeZone.current.identifier
    let screen = UIScreen.main.bounds
    let scale = UIScreen.main.scale
    let resolution = "\(Int(screen.width * scale))x\(Int(screen.height * scale))"

    guard let url = URL(string: "\(YLNK_QUERY_URL)?appConfigId=\(APP_CONFIG_ID)"),
          let body = try? JSONSerialization.data(withJSONObject: [
              "timezone": timezone, "screenResolution": resolution
          ]) else { return }

    var request = URLRequest(url: url)
    request.httpMethod = "POST"
    request.setValue("application/json", forHTTPHeaderField: "Content-Type")
    request.httpBody = body

    URLSession.shared.dataTask(with: request) { data, _, _ in
        guard let data = data,
              let json = try? JSONSerialization.jsonObject(with: data) as? [String: Any],
              let d = json["data"] as? [String: Any], d["found"] as? Bool == true,
              let deepLink = d["deepLinkUrl"] as? String,
              let url = URL(string: deepLink) else { return }
        DispatchQueue.main.async {
            UIApplication.shared.open(url, options: [:], completionHandler: nil)
        }
    }.resume()
}