/// <summary>
/// Initializes a new instance of the <see cref="OutputTemplateRenderer"/> class.
/// </summary>
/// <param name="outputTemplate">The output template.</param>
/// <param name="options">The options.</param>
internal OutputTemplateRenderer(string outputTemplate, TelegramSinkOptions options)
{
MessageTemplate template = new MessageTemplateParser().Parse(outputTemplate);
var renderActions = new List <Action <ExtendedLogEvent, TextWriter> >();
foreach (MessageTemplateToken token in template.Tokens)
{
switch (token)
{
case TextToken textToken:
renderActions.Add((_, w) => TextTokenRenderer.Render(textToken, w, options));
break;
case PropertyToken propertyToken:
switch (propertyToken.PropertyName)
{
case OutputProperties.LevelPropertyName:
renderActions.Add(new LogLevelRenderer(propertyToken).Render);
break;
case OutputProperties.NewLinePropertyName:
renderActions.Add((_, w) => w.WriteLine());
break;
case OutputProperties.ExceptionPropertyName:
renderActions.Add(new ExceptionRenderer(options).Render);
break;
case OutputProperties.MessagePropertyName:
renderActions.Add(new MessageRenderer(options).Render);
break;
case OutputProperties.TimestampPropertyName:
renderActions.Add(new TimestampRenderer(propertyToken).Render);
break;
default:
renderActions.Add(new DefaultPropertyRenderer(propertyToken).Render);
break;
}
break;
}
}
this.renderActions = renderActions.ToArray();
}
/// <inheritdoc cref="IPropertyRenderer"/>
public void Render(ExtendedLogEvent logEvent, TextWriter output)
{
using var writer = new StringWriter(new StringBuilder());
foreach (MessageTemplateToken token in logEvent.LogEvent.MessageTemplate.Tokens)
{
switch (token)
{
case TextToken textToken:
TextTokenRenderer.Render(textToken, output, options);
break;
case PropertyToken propertyToken:
new DefaultPropertyRenderer(propertyToken).Render(logEvent, writer);
break;
}
}
output.Write(HtmlEscaper.Escape(options, writer.ToString()));
}
