public void WriteTo(DiagramWriter writer)
{
Classifiers.WriteTo(writer);
if (Note.HasText)
{
// we need a separator between the
// classes and the diagram note
if (Classifiers.Count > 0)
writer.AddSeparator();
writer.WithNote(Note);
}
}
/// <summary>
/// create the new class diagram
/// and send it to the webservice.
/// Receive the result and render it via the web browser.
/// </summary>
private async void UpdateDiagram()
{
// write classifiers and relations to diagram
var diagramWriter = new DiagramWriter();
_diagram.WriteTo(diagramWriter);
var diagramText = diagramWriter.ToString();
// skip if diagram did not change
if (diagramText == _lastDslText)
return;
// send diagram data to server
_lastDslText = diagramText;
var content = new Dictionary<string, string>
{
["dsl_text"] = diagramText
};
// wait for response image URI
try
{
var response = await _yumleHttpConnection.PostAsync(
_settings.YumlDiagramRequestUri,
new FormUrlEncodedContent(content));
// the result is the file name of the cached png,
// we remove the extension to access the resource
if (response.IsSuccessStatusCode)
{
var result = await response.Content.ReadAsStringAsync();
var uri = $"{_settings.YumlBaseUrl}{GetFileNameWithoutExtension(result)}";
UriToDiagram = uri;
}
else
{
// TODO: show some error message here (in HTML maybe?)
}
}
catch (HttpRequestException exception)
{
// TODO: show correct error message here (in HTML maybe?)
}
}
protected override void Init()
{
_diagram = new DiagramWriter();
}