public void RenameTag(IJournalReader journalReader, string oldTag, string newTag)
{
if (string.IsNullOrWhiteSpace(oldTag) || string.IsNullOrWhiteSpace(newTag))
{
throw new ArgumentNullException($"'{nameof(oldTag)}' cannot be null, empty, or whitespace.", nameof(oldTag));
}
if (string.IsNullOrWhiteSpace(newTag))
{
throw new ArgumentNullException($"'{nameof(newTag)}' cannot be null, empty, or whitespace.", nameof(newTag));
}
if (!journalReader.FrontMatter.HasTags())
{
throw new InvalidOperationException("No tags exist in this journal.");
}
var currentTags = journalReader.FrontMatter.Tags.ToList();
var oldItemIndex = currentTags.IndexOf(oldTag);
if (oldItemIndex < 0)
{
throw new InvalidOperationException($"The tag '{oldTag}' does not exist.");
}
currentTags[oldItemIndex] = newTag;
var readmeExpression = new ReadmeParser(journalReader.FrontMatter.Readme).ToExpression(journalReader.EntryDate);
var frontMatter = new JournalFrontMatter(currentTags, readmeExpression);
var newEntry = frontMatter.ToString(asFrontMatter: true) + journalReader.RawBody;
_fileSystem.File.WriteAllText(journalReader.FilePath, newEntry);
}
protected override void Validate(object arguments, EngineIntrinsics engineIntrinsics)
{
var exp = arguments.ToString();
var parser = new ReadmeParser(arguments.ToString());
if (parser.IsValid)
{
return;
}
var message = $"{Environment.NewLine}The value you entered '{exp}' is not a valid readme expression. Valid expressions are specific dates, " +
"such as 12/19/2021, or a time period written in the form of '{integer} {time period}', where 'integer' " +
"is any positive number greater than zero and 'time period' is either 'days', 'weeks', 'months', or 'years'. " +
"For example, '15 weeks' or '12 years'.";
throw new PSArgumentException(message.Wrap());
}
