/// <summary>
/// Effectively validates <see cref="MarkdownEntry" />
/// </summary>
/// <param name="entry">the <see cref="MarkdownEntry" /> entry</param>
public static MarkdownEntry DoNullCheck(this MarkdownEntry entry)
{
entry.DoNullCheckForFrontMatter();
entry.DoNullCheckForContent();
return(entry);
}
/// <summary>
/// Returns the <see cref="MarkdownEntry"/>
/// based on <see cref="MarkdownEntry.FrontMatter"/>
/// with a <c>title</c> property.
/// </summary>
/// <param name="entry">the <see cref="MarkdownEntry" /> entry</param>
/// <param name="headerLevel"></param>
/// <returns></returns>
public static MarkdownEntry WithContentHeader(this MarkdownEntry entry, int headerLevel)
{
entry.DoNullCheckForFrontMatter();
var propertyName = "title";
if (!entry.FrontMatter.HasProperty(propertyName))
{
throw new FormatException($"The expected date property, `{propertyName ?? "[null]"}`, is not here.");
}
headerLevel = (headerLevel == 0) ? 1 : Math.Abs(headerLevel);
var markdownHeader = new string(Enumerable.Repeat('#', (headerLevel > 6) ? 6 : headerLevel).ToArray());
return(entry.WithEdit(i => i.Content = $"{markdownHeader} {i.FrontMatter[propertyName]}{MarkdownEntry.NewLine}{MarkdownEntry.NewLine}"));
}