public UserAgent(string userAgentString, UAPlatform platform, double weight, double cumulative)
{
this.userAgentString = userAgentString;
this.weight = weight;
this.cumulative = cumulative;
this.platform = platform;
}
/// <inheritdoc/>
public string Generate(UAPlatform platform)
{
// Take the correct precomputed cumulative distribution
var distribution = distributions[platform];
// Take the maximum value of the cumulative function
var max = distribution.Last().cumulative;
// Generate a random double up to the previously computed maximum
var random = rand.NextDouble() * max;
// Return the first user agent with cumulative greater or equal to the random one
return(distribution.First(u => u.cumulative >= random).userAgentString);
}
private UserAgent[] ComputeDistribution(IEnumerable <UserAgent> agents, UAPlatform platform)
{
var valid = agents.Where(a => BelongsToPlatform(a.platform, platform));
var distribution = new List <UserAgent>();
double cumulative = 0;
foreach (var elem in valid)
{
cumulative += elem.weight;
distribution.Add(new UserAgent(elem.userAgentString, elem.platform, elem.weight, cumulative));
}
return(distribution.ToArray());
}
public static string RandomUserAgent(BotData data, UAPlatform platform = UAPlatform.All)
{
data.Logger.LogHeader();
data.Logger.Log("Getting random UA from the builtin provider");
string ua;
try
{
ua = data.Providers.RandomUA.Generate(platform);
}
catch
{
ua = "NO_RANDOM_UA_FOUND";
}
data.Logger.Log(ua);
return(ua);
}
private static bool BelongsToPlatform(UAPlatform current, UAPlatform required) => required switch
{
