//--- Class Methods ---
public static string ConvertContentsToSsml(
this MorningReportInfo morningReport,
string _preHeadingBreak = "750ms",
string _postHeadingBreak = "250ms",
string _bulletBreak = "750ms",
int maxLength = 7500
)
{
// extract contents into sections and sentences
var buffer = new StringBuilder();
var sections = new List <(string Title, List <string> Sentences)>();
sections.Add((Title: morningReport.Title, Sentences: new List <string>()));
Visit(morningReport.Document.Root);
// convert HTML to SSML format
var ssml = new XDocument(new XElement("speak"));
var root = ssml.Root;
var currentLength = 0;
var firstHeading = true;
foreach (var section in sections)
{
var accumulator = new XElement("acc");
if (!firstHeading)
{
accumulator.Add(new XElement("break", new XAttribute("time", _preHeadingBreak)));
}
firstHeading = false;
accumulator.Add(new XText(section.Title));
accumulator.Add(new XElement("break", new XAttribute("time", _postHeadingBreak)));
foreach (var sentence in section.Sentences)
{
if (sentence.StartsWith("\u2022"))
{
accumulator.Add(new XElement("break", new XAttribute("time", _bulletBreak)));
accumulator.Add(new XText(sentence));
}
else
{
accumulator.Add(new XElement("p", new XText(sentence)));
}
}
var accumulatorLength = accumulator.ToString().Length;
if (currentLength + accumulatorLength > maxLength)
{
break;
}
foreach (var node in accumulator.Nodes())
{
root.Add(node);
}
currentLength += accumulatorLength;
}
root.Add(new XElement("p", new XText($"This was the morning report by {morningReport.Author}, published on {morningReport.Date:dddd, MMMM d, yyyy}.")));
return(ssml.ToString());
//--- Local Functions ---
void VisitNodes(XElement element)
{
foreach (var node in element.Nodes())
{
Visit(node);
}
}
void Visit(XNode node)
{
switch (node)
{
case XElement xelement:
var name = xelement.Name.ToString();
switch (name)
{
case "p":
VisitNodes(xelement);
if (buffer.Length > 0)
{
sections.Last().Sentences.Add(buffer.ToString());
buffer.Clear();
}
break;
case "h1":
case "h2":
case "h3":
case "h4":
case "h5":
case "h6":
if (buffer.Length > 0)
{
sections.Last().Sentences.Add(buffer.ToString());
buffer.Clear();
}
VisitNodes(xelement);
sections.Add((Title: buffer.ToString().Trim(), Sentences: new List <string>()));
buffer.Clear();
break;
default:
VisitNodes(xelement);
break;
}
break;
case XText xtext:
var decodedText = DecodeHtmlEntities(xtext.Value).Trim();
if (decodedText.Length > 0)
{
if (buffer.Length > 0)
{
buffer.Append(' ');
}
buffer.Append(decodedText);
}
break;
}
}
}
public static string ConvertContentsToText(this MorningReportInfo morningReport)
{
// extract all inner text nodes
var text = new StringBuilder();
// add title when present
if (morningReport.Title != null)
{
text.AppendLine($"=== {morningReport.Title} ===");
if (morningReport.Author != null)
{
text.AppendLine($"{morningReport.Date:dddd, MMMM d, yyyy} by {morningReport.Author}");
}
else
{
text.AppendLine(morningReport.Date.ToString("dddd, MMMM d, yyyy"));
}
text.AppendLine();
}
// convert HTML to plain-text format
Visit(morningReport.Document.Root);
return(text.ToString());
//--- Local Functions ---
void VisitNodes(XElement element)
{
foreach (var node in element.Nodes())
{
Visit(node);
}
}
void Visit(XNode node)
{
switch (node)
{
case XElement xelement:
var name = xelement.Name.ToString();
switch (name)
{
case "p":
VisitNodes(xelement);
text.AppendLine();
text.AppendLine();
break;
case "h1":
case "h2":
case "h3":
case "h4":
case "h5":
case "h6":
text.Append("-- ");
VisitNodes(xelement);
text.Append(" --");
text.AppendLine();
break;
default:
VisitNodes(xelement);
break;
}
break;
case XText xtext:
text.Append(DecodeHtmlEntities(xtext.Value));
break;
}
}
}
