private (string, AutocompleteSuggestionType) parseQuery(TextFieldInfo info)
{
if (string.IsNullOrEmpty(info.Text))
{
return(info.Text, AutocompleteSuggestionType.TimeEntries);
}
var querySymbols = info.ProjectId != null ? QuerySymbols.ProjectSelected : QuerySymbols.All;
var stringToSearch = info.Text.Substring(0, info.DescriptionCursorPosition);
var indexOfQuerySymbol = stringToSearch.LastIndexOfAny(querySymbols);
if (indexOfQuerySymbol >= 0)
{
var startingIndex = indexOfQuerySymbol + 1;
var stringLength = info.Text.Length - indexOfQuerySymbol - 1;
var suggestion =
stringToSearch[indexOfQuerySymbol] == QuerySymbols.Projects
? AutocompleteSuggestionType.Projects
: AutocompleteSuggestionType.Tags;
return(info.Text.Substring(startingIndex, stringLength), suggestion);
}
return(info.Text, AutocompleteSuggestionType.TimeEntries);
}
private static QueryInfo?searchByQuerySymbols(QueryTextSpan span, TextFieldInfo info)
{
var validQuerySymbols = info.ValidQuerySymbols();
var text = span.Text;
var possibleIndexOfQuerySymbol =
text.Substring(0, span.CursorPosition)
.Select((character, index) => ((int?)index, character))
.Where(tuple => validQuerySymbols.Contains(tuple.Item2))
.Select(tuple => tuple.Item1)
.FirstOrDefault(querySymbolIndex =>
{
var previousIndex = querySymbolIndex.Value - 1;
var isValidSymbolIndex = previousIndex < 0 || Char.IsWhiteSpace(text[previousIndex]);
return(isValidSymbolIndex);
});
if (possibleIndexOfQuerySymbol == null)
{
return(null);
}
var indexOfQuerySymbol = possibleIndexOfQuerySymbol.Value;
var startingIndex = indexOfQuerySymbol + 1;
var stringLength = text.Length - indexOfQuerySymbol - 1;
var type = getSuggestionType(text[indexOfQuerySymbol]);
var queryText = text.Substring(startingIndex, stringLength);
return(new QueryInfo(queryText, type));
}
public static QueryInfo ParseFieldInfo(TextFieldInfo info)
{
if (string.IsNullOrEmpty(info.Text))
{
return(emptyQueryInfo);
}
return(searchByQuerySymbols(info)
?? getDefaultQueryInfo(info.Text));
}
public static QueryInfo ParseFieldInfo(TextFieldInfo info)
{
var querySpan = info.GetSpanWithCurrentTextCursor();
if (string.IsNullOrEmpty(querySpan?.Text))
{
return(emptyQueryInfo);
}
return(searchByQuerySymbols(querySpan, info) ?? getDefaultQueryInfo(querySpan.Text));
}
private static QueryInfo?searchByQuerySymbols(TextFieldInfo info)
{
int indexOfQuerySymbol = info.DescriptionCursorPosition;
string stringToSearch;
do
{
stringToSearch = info.Text.Substring(0, indexOfQuerySymbol);
indexOfQuerySymbol = stringToSearch.LastIndexOfAny(getQuerySymbols(info));
} while (indexOfQuerySymbol > 0 && Char.IsWhiteSpace(stringToSearch[indexOfQuerySymbol - 1]) == false);
if (indexOfQuerySymbol >= 0)
{
var startingIndex = indexOfQuerySymbol + 1;
var stringLength = info.Text.Length - indexOfQuerySymbol - 1;
var type = getSuggestionType(stringToSearch[indexOfQuerySymbol]);
var text = info.Text.Substring(startingIndex, stringLength);
return(new QueryInfo(text, type));
}
return(null);
}
public IObservable <IEnumerable <AutocompleteSuggestion> > Query(TextFieldInfo info)
{
var(queryText, suggestionType) = parseQuery(info);
return(Query(queryText, suggestionType));
}
public IObservable <IEnumerable <AutocompleteSuggestion> > Query(TextFieldInfo info) => Query(QueryInfo.ParseFieldInfo(info));
private static char[] getQuerySymbols(TextFieldInfo info)
=> info.ProjectId.HasValue
? QuerySymbols.ProjectSelected
: QuerySymbols.All;