/// <inheritdoc />
protected override async Task <IEnumerable <IDocument> > ExecuteInputAsync(IDocument input, IExecutionContext context)
{
context.LogDebug(
"Processing Handlebars {0} for {1}",
string.IsNullOrEmpty(_sourceKey) ? string.Empty : ("in" + _sourceKey),
input.ToSafeDisplayString());
string content;
if (string.IsNullOrEmpty(_sourceKey))
{
content = await input.GetContentStringAsync();
}
else if (input.ContainsKey(_sourceKey))
{
content = input.GetString(_sourceKey) ?? string.Empty;
}
else
{
// Don't do anything if the key doesn't exist
return(input.Yield());
}
IHandlebars handlebars = HandlebarsDotNet.Handlebars.Create();
// Configure
if (_configure != null)
{
await _configure(context, input, handlebars);
}
// Register partials
foreach ((string name, Config <string> partial) in _partials)
{
handlebars.RegisterTemplate(name, await partial.GetValueAsync(input, context));
}
// Register helpers
foreach ((string name, Config <HandlebarsHelper> helper) in _helpers)
{
handlebars.RegisterHelper(name, await helper.GetValueAsync(input, context));
}
// Register block helpers
foreach ((string name, Config <HandlebarsBlockHelper> blockHelper) in _blockHelpers)
{
handlebars.RegisterHelper(name, await blockHelper.GetValueAsync(input, context));
}
string result = handlebars.Compile(content)(_model is null
? input.AsDynamic()
: await _model.GetValueAsync(input, context));
return(string.IsNullOrEmpty(_sourceKey)
? input.Clone(await context.GetContentProviderAsync(result, MediaTypes.Html)).Yield()
: input
.Clone(new MetadataItems
{
{ string.IsNullOrEmpty(_destinationKey) ? _sourceKey : _destinationKey, result }
})
.Yield());
}