/// <summary>
/// Write the table of contents based on annotations in the page files to the destination filename
/// </summary>
/// <param name="destination"></param>
/// <returns></returns>
protected async Task WriteTableOfContentsFileAsync(string destination)
{
List <TocItem> allTocEntries = new List <TocItem>();
foreach (var file in this.Documents.Files)
{
allTocEntries.AddRange(TocItem.TocItemsForFile(file));
}
// Convert the Url properties to be usable by the output system
foreach (var item in allTocEntries)
{
item.Url = this.QualifyUrl(item.Url.Replace('\\', '/'));
}
allTocEntries = allTocEntries.OrderBy(x => x.TocPath).ToList();
var tree = BuildTreeFromList(allTocEntries, addLevelForSections: true);
var data = new { toc = tree };
string output = JsonConvert.SerializeObject(data, Formatting.Indented);
using (var writer = new StreamWriter(destination, false, new System.Text.UTF8Encoding(false)))
{
await writer.WriteLineAsync(output);
await writer.FlushAsync();
}
}
/// <summary>
/// Collpase headers into Headers and NextLevel items based on path hierarchy
/// </summary>
/// <param name="headers"></param>
/// <param name="currentPage"></param>
/// <returns></returns>
private List <TocItem> BuildTreeFromList(List <TocItem> headers, DocFile currentPage = null, bool addLevelForSections = false)
{
List <TocItem> topLevelHeaders = new List <TocItem>();
foreach (var header in headers)
{
string pathForHeader = header.TocPath;
if (addLevelForSections)
{
pathForHeader = header.Section + "\\" + pathForHeader;
}
var pathComponents =
pathForHeader.Split(new char[] { '\\', '/' }, StringSplitOptions.RemoveEmptyEntries).ToList();
List <TocItem> headersForTargetLevel = topLevelHeaders;
while (pathComponents.Count > 1)
{
// Point headersForTargetLevel to the proper level
var headerForNextLevel =
(from h in headersForTargetLevel
where h.Title == pathComponents[0]
select h).FirstOrDefault();
if (headerForNextLevel == null)
{
// We encountered a header that doesn't exist yet. Bummer. We should do something about that.
headerForNextLevel = new TocItem()
{
Title = pathComponents[0],
Section = header.Section
};
headersForTargetLevel.Add(headerForNextLevel);
}
headersForTargetLevel = headerForNextLevel.NextLevel;
pathComponents.RemoveAt(0);
}
headersForTargetLevel.Add(header);
}
if (this.CollapseTocToActiveGroup && null != currentPage)
{
var pageTocComponents = currentPage.Annotation.TocPath.FirstPathComponent();
foreach (var header in topLevelHeaders)
{
if (header.Title != pageTocComponents)
{
header.NextLevel.Clear();
}
}
}
return(SortTocTree(topLevelHeaders));
}