public async Task StartLoop()
{
try
{
Console.Clear();
}
catch (System.IO.IOException)
{
// Ignore exception when output is redirected.
// This is a known issue and workaround.
}
while (true)
{
ICommand commandToExecute = null;
// If there are no command in the queue, ask for a new one from user
if (executionContext.CommandQueue.Count == 0)
{
var completableReadLine = new CompletableReadLine(rootCommandNode);
var command = completableReadLine.ReadLine(Prompt);
var commandTokens = command.Split(new[] { " " }, StringSplitOptions.RemoveEmptyEntries);
var closestCommandNode = rootCommandNode.FindNode(commandTokens);
var parseOutput = closestCommandNode.ParseFunction(commandTokens);
if (parseOutput.command == null)
{
outputService.Error(parseOutput.error);
}
else
{
commandToExecute = parseOutput.command;
}
}
else
{
commandToExecute = executionContext.CommandQueue.Dequeue();
}
if (commandToExecute != null)
{
await commandToExecute.Execute(outputService, executionContext);
}
}
}
private IEnumerable <CommandNode> GetValidCompletionTree()
{
var lastBlock = ParseLastUserInputLastBlock();
// Trim last block from completion tree calculation since it is an unfinished block
var commitedUserInput = lastBlock.prefix.Length > 0 ?
lastUserInput.Remove(lastBlock.index) :
lastUserInput;
var matchedCommandNode = rootCommandNode.FindNode(
commitedUserInput.Split(
new[] { " " },
StringSplitOptions.RemoveEmptyEntries),
exact: true);
return(matchedCommandNode?.Children ?? new List <CommandNode>());
}