air.bal

function bookAirline(http:Caller caller, map<json> outReqPayload, json | error airlinePreference, http:Response outResponse) returns error? {
    // Reserve airline ticket for the user by calling Airline reservation service
    // construct the payload
    map<json> outReqPayloadAirline = outReqPayload.clone();
    outReqPayloadAirline["Preference"] = <json>airlinePreference;

    // Send a post request to airlineReservationService with appropriate payload and get response
    http:Response inResAirline = check airlineReservationEP->post("/reserve", <@untainted>outReqPayloadAirline);

    // Get the reservation status
    var airlineResPayload = check <@untainted>inResAirline.getJsonPayload();
    string airlineStatus = airlineResPayload.Status.toString();
        // If reservation status is negative, send a failure response to user
    if (airlineStatus != "Success") {
        outResponse.setJsonPayload({
            "Message": "Failed to reserve airline! " +
            "Provide a valid 'Preference' for 'Airline' and try again"
        });
        var result = caller->respond(outResponse);
        if (result is error) {
            log:printError(result.reason(), err = result);
        }
        return;
    }
}