/// <summary>
/// Tests for the existance of a path.
/// </summary>
/// <param name="context">The template context.</param>
/// <param name="span">The source span.</param>
/// <param name="path">The path to test.</param>
/// <param name="type">The type of path to test. May be one of the following: "leaf", "container" or "any". Defaults to "any".</param>
/// <returns>If the path exists, `true`. Otherwise, `false`.</returns>
/// <remarks>
/// ```template-text
/// {{ '.\foo.txt' | fs.test }}
/// ```
/// ```html
/// true
/// ```
/// </remarks>
public static bool Test(TemplateContext context, SourceSpan span, string path, string type = "any")
{
if (string.IsNullOrEmpty(path))
{
throw new ScriptRuntimeException(span, string.Format(RS.FSPathRequired, "fs.test"));
}
PathType pathType = PathType.Any;
if (string.IsNullOrEmpty(type))
{
type = "any";
}
else
{
type = type.ToLowerInvariant();
}
switch (type)
{
case "any":
break;
case "container":
pathType = PathType.Container;
break;
case "leaf":
pathType = PathType.Leaf;
break;
default:
throw new ScriptRuntimeException(span, string.Format(RS.FSUnsupportedType, "fs.test", type));
}
ITemplateLoader templateLoader = context.TemplateLoader;
if (templateLoader == null)
{
throw new ScriptRuntimeException(span, string.Format(RS.NoTemplateLoader, "fs.test"));
}
bool pathExists = false;
try
{
pathExists = templateLoader.PathExists(context, span, path, pathType);
}
catch (Exception ex) when(!(ex is ScriptRuntimeException))
{
}
return(pathExists);
}