Content of onAppOpenAttribution function

onAppOpenAttribution.swift

func onAppOpenAttribution(_ attributionData: [AnyHashable: Any]) {

    // If opening app from onelink shortlink we check for `af_dp` property
    if let deeplink = attributionData[Keys.deeplink] as? String,
        let deeplinkURL = URL(string: deeplink) {
        delegate?.setDeeplinkURL(deeplinkURL)
        return
    }

    // Else we get `link` property and and parse it's params
    guard let link = attributionData[Keys.link] as? String,
        let linkURL = URL(string: link)
        else { return }

    // Parse link and get item `af_dp`from query items
    let components = URLComponents(url: linkURL, resolvingAgainstBaseURL: false)
    let deeplinkComponent = components?.queryItems?.first(where: { item -> Bool in
        return item.name == Keys.deeplink
    })

    // Create an URL and send to delegate
    guard let deeplink = deeplinkComponent?.value,
        let deeplinkURL = URL(string: deeplink)
        else { return }
    delegate?.setDeeplinkURL(deeplinkURL)
}