private async Task <string> RenderAsync(MailTemplate template, MailTemplateContext context)
{
using (var output = new StringWriter())
{
template.Context = context;
template.Output = output;
await template.ExecuteAsync();
await output.FlushAsync();
template.Output = null;
string result;
if (template.Layout != null)
{
result = await RenderLayoutAsync(template.Layout, context, output.ToString(), template.Sections);
}
else
{
result = output.ToString();
}
return(result);
}
}
public async Task <MimeMessage> RenderAsync(MailTemplate template)
{
var context = new MailTemplateContext();
// render template
var htmlBody = await RenderAsync(template, context);
// construct message
var message = new MimeMessage();
if (context.Subject != null)
{
message.Subject = context.Subject;
}
var body = new Multipart("mixed");
body.Add(new TextPart(TextFormat.Html)
{
Text = htmlBody,
});
foreach (var bodyPart in context.BodyParts)
{
body.Add(bodyPart);
}
message.Body = body;
return(message);
}
private async Task <string> RenderLayoutAsync(MailTemplateLayout layout, MailTemplateContext context, string body, IDictionary <string, Func <TextWriter, Task> > sections)
{
using (var output = new StringWriter())
{
layout.Context = context;
layout.Output = output;
layout.ChildBody = body;
layout.ChildSections = sections;
await layout.ExecuteAsync();
await output.FlushAsync();
layout.Output = null;
string result;
if (layout.Layout != null)
{
result = await RenderLayoutAsync(layout.Layout, context, output.ToString(), layout.Sections);
}
else
{
result = output.ToString();
}
return(result);
}
}