build method

@override Widget build(BuildContext context, Message message, Map<String, List<Attachment>> attachments)

Builds a widget for the given message and attachments. This will only be called if canHandle returns true.

Implementation

@override
Widget build(
  BuildContext context,
  Message message,
  Map<String, List<Attachment>> attachments,
) {
  assert(debugAssertCanHandle(message, attachments), '');

  final urls = attachments[AttachmentType.urlPreview];
  final files = attachments[AttachmentType.file];
  final images = attachments[AttachmentType.image];
  final videos = attachments[AttachmentType.video];
  final giphys = attachments[AttachmentType.giphy];

  final shouldBuildGallery = [...?images, ...?videos, ...?giphys].length > 1;

  return Padding(
    padding: padding,
    child: Column(
      mainAxisSize: MainAxisSize.min,
      children: <Widget>[
        if (urls != null)
          _urlAttachmentBuilder.build(context, message, {
            AttachmentType.urlPreview: urls,
          }),
        if (files != null)
          _fileAttachmentBuilder.build(context, message, {
            AttachmentType.file: files,
          }),
        if (shouldBuildGallery)
          _galleryAttachmentBuilder.build(context, message, {
            if (images != null) AttachmentType.image: images,
            if (videos != null) AttachmentType.video: videos,
            if (giphys != null) AttachmentType.giphy: giphys,
          })
        else if (images != null && images.length == 1)
          _imageAttachmentBuilder.build(context, message, {
            AttachmentType.image: images,
          })
        else if (videos != null && videos.length == 1)
          _videoAttachmentBuilder.build(context, message, {
            AttachmentType.video: videos,
          })
        else if (giphys != null && giphys.length == 1)
          _giphyAttachmentBuilder.build(context, message, {
            AttachmentType.giphy: giphys,
          }),
      ].insertBetween(
        SizedBox(height: padding.vertical / 2),
      ),
    ),
  );
}