89 lines
2.2 KiB
Dart
89 lines
2.2 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:stream_chat_flutter/stream_chat_flutter.dart';
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import 'package:stream_chat_flutter_core/stream_chat_flutter_core.dart';
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/// Enum for identifying type of attachment
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enum AttachmentSource {
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/// Attachment is attached
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local,
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/// Attachment is uploaded
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network,
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}
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/// Extension for identifying type of attachment
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extension AttachmentSourceX on AttachmentSource {
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/// The [when] method is the equivalent to pattern matching.
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/// Its prototype depends on the AttachmentSource defined.
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// ignore: missing_return
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T when<T>({
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required T Function() local,
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required T Function() network,
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}) {
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switch (this) {
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case AttachmentSource.local:
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return local();
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case AttachmentSource.network:
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return network();
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}
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}
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}
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/// Abstract class for deriving attachment types
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abstract class AttachmentWidget extends StatelessWidget {
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/// Constructor for creating attachment widget
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const AttachmentWidget({
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Key? key,
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required this.message,
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required this.attachment,
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this.size,
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AttachmentSource? source,
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}) : _source = source,
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super(key: key);
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/// Size of attachments
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final Size? size;
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final AttachmentSource? _source;
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/// Message which attachment is attached to
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final Message message;
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/// Attachment to display
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final Attachment attachment;
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/// Getter for source of attachment
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AttachmentSource get source =>
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_source ??
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(attachment.file != null
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? AttachmentSource.local
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: AttachmentSource.network);
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}
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/// Widget for building in case of error
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class AttachmentError extends StatelessWidget {
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/// Constructor for creating AttachmentError
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const AttachmentError({
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Key? key,
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this.size,
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}) : super(key: key);
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/// Size of error
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final Size? size;
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@override
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Widget build(BuildContext context) => Center(
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child: Container(
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width: size?.width,
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height: size?.height,
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color:
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StreamChatTheme.of(context).colorTheme.accentRed.withOpacity(.1),
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child: Center(
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child: Icon(
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Icons.error_outline,
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color: StreamChatTheme.of(context).colorTheme.black,
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),
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),
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),
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);
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}
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