/// <summary>
/// processing the data means checking if user has entered -1
/// if so then leave else check if number is negative then prompt the user again
/// if number is positive then check if the api is valid and returns data then make
/// the calculations and display the results, else give an error message and exit
/// </summary>
/// <param name="strdist">it is the user input for the distance to travle</param>
/// <returns>true for success and false for failure</returns>
public bool applyprocess(string strdist)
{
decimal dbldistance = 0;
if (strdist.Trim() != "-1")
{
decimal.TryParse(strdist, out dbldistance);
if (dbldistance > 0)
{
if (!_businesslogic.ProcessData(dbldistance))
{
return(false);
}
else
{
return(true);
}
}
else
{
_disp.displaymessage("Please enter a positive numeric number!", "info");
return(true);
}
}
else
{
return(false);
}
}
/// <summary>
/// getting data from the api
/// </summary>
/// <param name="strurl">the url to call the api if empty take the default address else use the url sent</param>
/// <returns>an object of type starships</returns>
public starships getstarshipsfromapi(string strurl)
{
string strresult;
starships ships = null;
using (WebClient client = new WebClient())
{
///using webclient in order to bring data from api, and need the data to be of type JSON
client.Headers.Add("Content-Type: application/json");
client.Headers.Add("Accept: application/json");
///if url empty take the default url
if (strurl == "")
{
strurl = "https://swapi.co/api/starships";
}
try
{
///get data from the api
strresult = client.DownloadString(strurl);
///convert JSON data into ojects of type starships
ships = JsonConvert.DeserializeObject <starships>(strresult);
}
catch (Exception ex)
{
///if an error or url not valid send back an error message
_disp.displaymessage($"Error in Getting data { ex.Message }", "error");
}
}
return(ships);
}