doorkeeper_dev/components/dk/src/pairing_service/scan_controller.cpp

#include "pairing_service/scan_controller.h"

#include <vector>
#include <nlohmann_json/json.hpp>
#include <kbf/wifi.h>

using std::vector;
using namespace kbf;
using nlohmann::json;

ScanController::ScanController() : Controller("/scan") {}

http::Response ScanController::get(const http::Request &request) {
    if (!scanning && lastScanResults.empty()) {
        scanning = true;
        wifi::sta::onScanDone = &handleScanDone;
        wifi::sta::startScan((void *) this);
    }

    if (scanning) {
        return kbf::http::Response(((json) {
                {"finished", false},
                {"results",  json::array()}
        }).dump());
    }

    json responseJson = {{"finished", true}, {"results", json::array()}};
    for (const auto &ap : lastScanResults) {
        responseJson["results"].push_back({{"ssid", ap.ssid},
                                           {"rssi", ap.rssi}});
    }
    lastScanResults.clear();

    return http::Response(responseJson.dump());
}

void ScanController::handleScanDone(vector<kbf::wifi::APInfo> &aps, void *data) {
    auto instance = static_cast<ScanController *>(data);

    instance->lastScanResults = std::move(aps);
    instance->scanning = false;
}