public Predicate <T> BuildFilter <T>(FactDate when, Func <FactDate, T, FactLocation> location)
{
Predicate <T> locationFilter = FilterUtils.TrueFilter <T>();
string country(FactLocation x) => x.Country;
if (Scotland)
{
locationFilter = FilterUtils.LocationFilter <T>(when, location, country, Countries.SCOTLAND);
}
else if (England)
{
locationFilter = FilterUtils.LocationFilter <T>(when, location, country, Countries.ENGLAND);
}
else if (Wales)
{
locationFilter = FilterUtils.LocationFilter <T>(when, location, country, Countries.WALES);
}
else if (UK)
{
locationFilter = FilterUtils.OrFilter <T>(FilterUtils.LocationFilter <T>(when, location, country, Countries.SCOTLAND),
FilterUtils.LocationFilter <T>(when, location, country, Countries.ENGLAND),
FilterUtils.LocationFilter <T>(when, location, country, Countries.WALES));
}
else if (Canada)
{
locationFilter = FilterUtils.LocationFilter <T>(when, location, country, Countries.CANADA);
}
else if (USA)
{
locationFilter = FilterUtils.LocationFilter <T>(when, location, country, Countries.UNITED_STATES);
}
return(locationFilter);
}