public static IEnumerable <string> GetRelevantCompletionItems(
string words,
IReadOnlyDictionary <string, string[]> completionItems)
{
completionItems = new Dictionary <string, string[]>(completionItems.ToDictionary(x => x.Key, x => x.Value), StringComparer.OrdinalIgnoreCase).AsReadOnly();
var suggestedItems = new List <string>();
var parts = words.Split(separator: ' ');
var currentWord = parts.Last() != string.Empty ? parts.Last() : null;
var parameters = parts.Where(ParameterService.IsParameter).Select(ParameterService.GetParameterMemberName).ToList();
var lastParameter = parameters.LastOrDefault();
void AddParameters()
{
var useDashes = currentWord == null ||
currentWord.TrimStart('-').Length == 0 ||
currentWord.StartsWith("--");
var items = completionItems.Keys
.Except(parameters, StringComparer.InvariantCultureIgnoreCase)
.Select(x => useDashes
? $"--{ParameterService.GetParameterDashedName(x)}"
: $"-{x}");
AddItems(items);
}
void AddTargetsOrValues(string parameter)
{
var passedItems = parts
.Reverse()
.TakeWhile(x => !ParameterService.IsParameter(x))
.Select(ParameterService.GetParameterMemberName);
var items = completionItems.GetValueOrDefault(parameter)?.Except(passedItems, StringComparer.OrdinalIgnoreCase) ??
new string[0];
if (parameter.EqualsOrdinalIgnoreCase(Constants.InvokedTargetsParameterName))
{
items = items.Select(x => x.SplitCamelHumpsWithSeparator("-", Constants.KnownWords));
}
AddItems(items);
}
void AddItems(IEnumerable <string> items)
{
foreach (var item in items)
{
if (currentWord == null)
{
suggestedItems.Add(item);
}
else if (item.StartsWithOrdinalIgnoreCase(currentWord))
{
var normalizedItem = item.ReplaceRegex(currentWord, x => currentWord, RegexOptions.IgnoreCase);
if (normalizedItem != item)
{
var letters = currentWord.Where(char.IsLetter).ToList();
if (letters.All(char.IsUpper))
{
normalizedItem = normalizedItem.ToUpperInvariant();
}
else if (letters.All(char.IsLower))
{
normalizedItem = normalizedItem.ToLowerInvariant();
}
}
suggestedItems.Add(normalizedItem);
}
}
}
if (lastParameter == null)
{
AddTargetsOrValues(Constants.InvokedTargetsParameterName);
}
else if (currentWord != lastParameter)
{
AddTargetsOrValues(lastParameter);
}
if (currentWord == null || ParameterService.IsParameter(currentWord))
{
AddParameters();
}
return(suggestedItems);
}