/*********
** Private methods
*********/
/// <summary>Get whether the given file path exists.</summary>
/// <param name="path">A relative file path.</param>
/// <exception cref="InvalidOperationException">The path is not relative or contains directory climbing (../).</exception>
private bool GetPathExists(string path)
{
if (string.IsNullOrWhiteSpace(path))
{
return(false);
}
// parse tokens
TokenString tokenStr = new TokenString(path, this.TokenContext);
if (tokenStr.InvalidTokens.Any())
{
return(false);
}
tokenStr.UpdateContext(this.TokenContext);
path = tokenStr.Value;
// get normalised path
if (string.IsNullOrWhiteSpace(path))
{
return(false);
}
path = PathUtilities.NormalisePathSeparators(path);
// validate
if (Path.IsPathRooted(path))
{
throw new InvalidOperationException($"The {ConditionType.HasFile} token requires a relative path.");
}
if (!PathUtilities.IsSafeRelativePath(path))
{
throw new InvalidOperationException($"The {ConditionType.HasFile} token requires a relative path and cannot contain directory climbing (../).");
}
// check file existence
string fullPath = Path.Combine(this.ModFolder, PathUtilities.NormalisePathSeparators(path));
return(File.Exists(fullPath));
}
