public bool Start()
{
using (var scope = new ConsoleScope())
{
bool result;
while (true)
{
scope.Render(Template, new TemplateModel {
Message = _message, DefaultValue = _defaultValue
});
var input = scope.ReadLine();
if (string.IsNullOrEmpty(input))
{
if (_defaultValue != null)
{
result = _defaultValue.Value;
break;
}
scope.SetError(new ValidationError("Value is required"));
}
else
{
var lowerInput = input.ToLower();
if (lowerInput == "y" || lowerInput == "yes")
{
result = true;
break;
}
if (lowerInput == "n" || lowerInput == "no")
{
result = false;
break;
}
scope.SetError(new ValidationError("Value is invalid"));
}
}
scope.Render(FinishTemplate, new FinishTemplateModel {
Message = _message, Result = result
});
return(result);
}
}
public T Start()
{
using (var scope = new ConsoleScope())
{
T result;
while (true)
{
scope.Render(Template, new TemplateModel {
Message = _message, DefaultValue = _defaultValue
});
var input = scope.ReadLine();
if (!scope.Validate(input, _validators))
{
continue;
}
if (string.IsNullOrEmpty(input))
{
if (_targetType.IsValueType && _underlyingType == null && _defaultValue == null)
{
scope.SetError(new ValidationError("Value is required"));
continue;
}
result = (T)_defaultValue;
break;
}
try
{
result = (T)Convert.ChangeType(input, _underlyingType ?? _targetType);
break;
}
catch (Exception ex)
{
scope.SetException(ex);
}
}
scope.Render(FinishTemplate, new FinishTemplateModel {
Message = _message, Result = result
});
return(result);
}
}
public T Start()
{
using (var scope = new ConsoleScope(false))
{
var options = _baseOptions;
var filteredOptions = _baseOptions;
int selectedIndex = FindDefaultIndex(options, _defaultValue);
var filter = "";
var prevFilter = "";
int prevPage = -1;
var pageCount = (options.Count - 1) / _pageSize + 1;
// Only resolve the page number when the option is neither 0 nor negative.
int currentPage = (selectedIndex == 0 || selectedIndex == -1) ? 0 : GetPageFromIndex(options, selectedIndex);
while (true)
{
if (filter != prevFilter)
{
filteredOptions = _baseOptions.Where(x => _filtering(filter, x.Value))
.ToArray();
prevFilter = filter;
currentPage = 0;
prevPage = -1;
pageCount = (filteredOptions.Count - 1) / _pageSize + 1;
}
if (currentPage != prevPage)
{
options = filteredOptions.Skip(currentPage * _pageSize)
.Take(_pageSize)
.ToArray();
// Initially, we need to check for the default index. After moving the page or default index this becomes irrelevant.
selectedIndex = prevPage == -1 && selectedIndex != -1 ? FindDefaultIndex(options, _baseOptions[selectedIndex].Item) : 0;
prevPage = currentPage;
}
scope.Render(Template, new TemplateModel {
Message = _message, Filter = filter, SelectedIndex = selectedIndex, Options = options
});
var keyInfo = scope.ReadKey();
if (keyInfo.Key == ConsoleKey.Enter)
{
if (selectedIndex != -1)
{
break;
}
scope.SetError(new ValidationError("Value is required"));
}
else if (keyInfo.Key == ConsoleKey.UpArrow)
{
if (selectedIndex <= 0)
{
selectedIndex = options.Count - 1;
}
else
{
selectedIndex--;
}
}
else if (keyInfo.Key == ConsoleKey.DownArrow)
{
if (selectedIndex >= options.Count - 1)
{
selectedIndex = 0;
}
else
{
selectedIndex++;
}
}
else if (keyInfo.Key == ConsoleKey.LeftArrow)
{
if (currentPage <= 0)
{
currentPage = pageCount - 1;
}
else
{
currentPage--;
}
}
else if (keyInfo.Key == ConsoleKey.RightArrow)
{
if (currentPage >= pageCount - 1)
{
currentPage = 0;
}
else
{
currentPage++;
}
}
else if (keyInfo.Key == ConsoleKey.Backspace)
{
if (filter.Length == 0)
{
scope.Beep();
}
else
{
filter = filter.Remove(filter.Length - 1, 1);
}
}
else if (!char.IsControl(keyInfo.KeyChar))
{
filter += keyInfo.KeyChar;
}
}
scope.Render(FinishTemplate, new FinishTemplateModel {
Message = _message, SelectedIndex = selectedIndex, Options = options
});
return(options[selectedIndex].Item);
}
}
public T Start()
{
using (var scope = new ConsoleScope(false))
{
var options = _baseOptions;
var filteredOptions = _baseOptions;
var selectedIndex = FindDefaultIndex(options, _defaultValue);
var filter = "";
var prevFilter = "";
var currentPage = 0;
var prevPage = -1;
var pageCount = (options.Count - 1) / _pageSize + 1;
while (true)
{
if (filter != prevFilter)
{
filteredOptions = _baseOptions.Where(x => _filtering(filter, x.Value))
.ToArray();
prevFilter = filter;
currentPage = 0;
prevPage = -1;
pageCount = (filteredOptions.Count - 1) / _pageSize + 1;
}
if (currentPage != prevPage)
{
options = filteredOptions.Skip(currentPage * _pageSize)
.Take(_pageSize)
.ToArray();
prevPage = currentPage;
selectedIndex = -1;
}
scope.Render(Template, new TemplateModel {
Message = _message, Filter = filter, SelectedIndex = selectedIndex, Options = options
});
var keyInfo = scope.ReadKey();
if (keyInfo.Key == ConsoleKey.Enter)
{
if (selectedIndex != -1)
{
break;
}
scope.SetError(new ValidationError("Value is required"));
}
else if (keyInfo.Key == ConsoleKey.UpArrow)
{
if (selectedIndex <= 0)
{
selectedIndex = options.Count - 1;
}
else
{
selectedIndex--;
}
}
else if (keyInfo.Key == ConsoleKey.DownArrow)
{
if (selectedIndex >= options.Count - 1)
{
selectedIndex = 0;
}
else
{
selectedIndex++;
}
}
else if (keyInfo.Key == ConsoleKey.LeftArrow)
{
if (currentPage <= 0)
{
currentPage = pageCount - 1;
}
else
{
currentPage--;
}
}
else if (keyInfo.Key == ConsoleKey.RightArrow)
{
if (currentPage >= pageCount - 1)
{
currentPage = 0;
}
else
{
currentPage++;
}
}
else if (keyInfo.Key == ConsoleKey.Backspace)
{
if (filter.Length == 0)
{
scope.Beep();
}
else
{
filter = filter.Remove(filter.Length - 1, 1);
}
}
else if (!char.IsControl(keyInfo.KeyChar))
{
filter += keyInfo.KeyChar;
}
}
scope.Render(FinishTemplate, new FinishTemplateModel {
Message = _message, SelectedIndex = selectedIndex, Options = options
});
return(options[selectedIndex].Item);
}
}
public IEnumerable <T> Start()
{
using (var scope = new ConsoleScope(false))
{
// Defaults
ICollection <Option> selectedOptions = new List <Option>();
IReadOnlyList <Option> _options = _baseOptions, filteredOptions = _baseOptions;
int currentIndex = 0;
string filter = "", prevFilter = "";
int prevPage = -1, pageCount = (_options.Count - 1) / _pageSize + 1;
int currentPage = 0;
while (true)
{
if (filter != prevFilter)
{
filteredOptions = _baseOptions.Where(x => _filtering(filter, x.Value))
.ToArray();
prevFilter = filter;
currentPage = 0;
prevPage = -1;
pageCount = (filteredOptions.Count - 1) / _pageSize + 1;
}
if (currentPage != prevPage)
{
_options = (filteredOptions).Skip(currentPage * _pageSize)
.Take(_pageSize)
.ToArray();
currentIndex = 0;
prevPage = currentPage;
}
scope.Render(Template, new TemplateModel {
Message = _message, Filter = filter, SelectedOptions = selectedOptions, Options = _options, CurrentIndex = currentIndex
});
var keyInfo = scope.ReadKey();
if (keyInfo.Key == ConsoleKey.Enter)
{
// Prevents selecting when filter does not match any items
if (_options.Count == 0)
{
continue;
}
Option currentOption = _options[currentIndex];
if (!selectedOptions.Contains(currentOption))
{
selectedOptions.Add(_options[currentIndex]);
}
else
{
selectedOptions.Remove(currentOption);
}
// If we have reached the limit, determine which items should not be selected anymore
if (_limit == selectedOptions.Count)
{
_disabledByLimit = _baseOptions.Where(o => !selectedOptions.Contains(o)).ToList();
_showConfirm = true;
}
else
{
_showConfirm = selectedOptions.Count >= _min;
if (_disabledByLimit.Count > 0)
{
_showConfirm = false;
_disabledByLimit = new List <Option>();
}
}
}
else if (keyInfo.Key == ConsoleKey.LeftArrow)
{
if (currentPage <= 0)
{
currentPage = pageCount - 1;
}
else
{
currentPage--;
}
}
else if (keyInfo.Key == ConsoleKey.RightArrow)
{
if (currentPage >= pageCount - 1)
{
currentPage = 0;
}
else
{
currentPage++;
}
}
else if (keyInfo.Key == ConsoleKey.Backspace)
{
if (filter.Length == 0)
{
scope.Beep();
}
else
{
filter = filter.Remove(filter.Length - 1, 1);
}
}
else if (!char.IsControl(keyInfo.KeyChar))
{
filter += keyInfo.KeyChar;
}
else if (keyInfo.Key == ConsoleKey.Tab)
{
if (selectedOptions.Count > 0 && selectedOptions.Count >= _min)
{
break;
}
scope.SetError(new ValidationError($"A minimum selection of {(_min > -1 ? _min : 1)} items is required"));
}
else if (keyInfo.Key == ConsoleKey.UpArrow)
{
if (_options.All(o => _disabledByLimit.Contains(o)))
{
continue;
}
currentIndex = (currentIndex <= 0) ? _baseOptions.Count - 1 : currentIndex -= 1;
while (!_baseOptions[currentIndex].Enabled || _disabledByLimit.Contains(_baseOptions[currentIndex]))
{
currentIndex = (currentIndex <= 0) ? _options.Count - 1 : currentIndex -= 1;
}
;
}
else if (keyInfo.Key == ConsoleKey.DownArrow)
{
if (_options.All(o => _disabledByLimit.Contains(o)))
{
continue;
}
currentIndex = (currentIndex >= _options.Count - 1) ? 0 : currentIndex += 1;
while (!_options[currentIndex].Enabled || _disabledByLimit.Contains(_options[currentIndex]))
{
currentIndex = currentIndex >= _options.Count - 1 ? 0 : currentIndex += 1;
}
;
}
}
scope.Render(FinishTemplate, new FinishTemplateModel {
Message = _message, SelectedOptions = selectedOptions, Options = _options, CurrentIndex = currentIndex
});
return(_baseOptions.Where(o => selectedOptions.Contains(o)).Select(x => x.Item));
}
}