/// <summary>
/// Uses specified choice to activate redirection to new page.
/// </summary>
/// <param name="id">Choice number (zero-based) at choices list of current page.</param>
public void MakeChoice(QuestChoice choice)
{
if (IsChoiceVisible(choice))
{
this.SetCurrentPage(choice.link);
}
}
static void ParsePageChoices(QuestPage page, QuestStream stream)
{
var lineId = stream.pointer;
while (true)
{
var line = stream.Next();
if (line.Length == 0)
{
break;
}
if (line[0] != '*')
{
stream.Previous(); break;
}
var matching = Regex.Match(line, "\\*(.*?)->\\s*?(\\b.+)");
if (!matching.Success)
{
throw new Exception(string.Format("Invalid choice syntax at line: {0}", lineId));
}
lineId = stream.pointer;
var choice = new QuestChoice();
choice.link = matching.Groups[2].Value.ToLowerInvariant();
var rawChoiceText = matching.Groups[1].Value;
if (!string.IsNullOrEmpty(rawChoiceText))
{
var matchingCond = Regex.Match(rawChoiceText, "\\{(.*?)\\}(.+)");
if (!matchingCond.Success)
{
choice.text = rawChoiceText.Trim();
}
else
{
choice.condition = ParseLogic(QuestLogicFilter.Expression, matchingCond.Groups[1].Value, lineId);
choice.text = matchingCond.Groups[2].Value.Trim();
}
}
page.choices.Add(choice);
}
if (page.choices.Count == 0)
{
throw new Exception(string.Format("No choices at line: {0}", lineId));
}
if (page.choices.Count == 1 && page.choices[0].condition != null)
{
throw new Exception(string.Format("Auto choice cant use condition at line: {0}", lineId));
}
}
/// <summary>
/// Checks choice visibility with respect optional condition.
/// </summary>
/// <param name="choice">Choice to test.</param>
public bool IsChoiceVisible(QuestChoice choice)
{
return(choice != null && (choice.condition == null || ProcessLogic(choice.condition)));
}