fluffychat/lib/components/list_items/message.dart

import 'package:bubble/bubble.dart';
import 'package:famedlysdk/famedlysdk.dart';
import 'package:fluffychat/components/message_content.dart';
import 'package:fluffychat/components/reply_content.dart';
import 'package:fluffychat/i18n/i18n.dart';
import 'package:fluffychat/utils/date_time_extension.dart';
import 'package:fluffychat/utils/event_extension.dart';
import 'package:fluffychat/utils/string_color.dart';
import 'package:fluffychat/views/image_viewer.dart';
import 'package:flutter/material.dart';

import '../avatar.dart';
import '../matrix.dart';
import 'state_message.dart';

class Message extends StatelessWidget {
  final Event event;
  final Event nextEvent;
  final Function(Event) onSelect;
  final bool longPressSelect;
  final bool selected;
  final Timeline timeline;

  const Message(this.event,
      {this.nextEvent,
      this.longPressSelect,
      this.onSelect,
      this.selected,
      this.timeline});

  @override
  Widget build(BuildContext context) {
    if (![EventTypes.Message, EventTypes.Sticker, EventTypes.Encrypted]
        .contains(event.type)) {
      return StateMessage(event);
    }

    Client client = Matrix.of(context).client;
    final bool ownMessage = event.senderId == client.userID;
    Alignment alignment = ownMessage ? Alignment.topRight : Alignment.topLeft;
    Color color = Theme.of(context).secondaryHeaderColor;
    final bool sameSender = nextEvent != null &&
            [EventTypes.Message, EventTypes.Sticker].contains(nextEvent.type)
        ? nextEvent.sender.id == event.sender.id
        : false;
    BubbleNip nip = sameSender
        ? BubbleNip.no
        : ownMessage ? BubbleNip.rightBottom : BubbleNip.leftBottom;
    Color textColor = ownMessage
        ? Colors.white
        : Theme.of(context).brightness == Brightness.dark
            ? Colors.white
            : Colors.black;
    MainAxisAlignment rowMainAxisAlignment =
        ownMessage ? MainAxisAlignment.end : MainAxisAlignment.start;

    if (event.messageType == MessageTypes.Image) {
      color = Theme.of(context).scaffoldBackgroundColor.withOpacity(0.66);
      textColor = Theme.of(context).textTheme.body1.color;
    } else if (ownMessage) {
      color = event.status == -1
          ? Colors.redAccent
          : Theme.of(context).primaryColor;
    }

    List<Widget> rowChildren = [
      Expanded(
        child: Bubble(
          elevation: 0,
          radius: Radius.circular(8),
          alignment: alignment,
          margin: BubbleEdges.symmetric(horizontal: 4),
          color: color,
          nip: nip,
          child: Stack(
            children: <Widget>[
              Column(
                mainAxisSize: MainAxisSize.min,
                crossAxisAlignment: CrossAxisAlignment.start,
                children: <Widget>[
                  if (event.isReply)
                    FutureBuilder<Event>(
                      future: event.getReplyEvent(timeline),
                      builder: (BuildContext context, snapshot) {
                        final Event replyEvent = snapshot.hasData
                            ? snapshot.data
                            : Event(
                                eventId: event.content['m.relates_to']
                                    ['m.in_reply_to']['event_id'],
                                content: {"msgtype": "m.text", "body": "..."},
                                senderId: event.senderId,
                                typeKey: "m.room.message",
                                room: event.room,
                                roomId: event.roomId,
                                status: 1,
                                time: DateTime.now(),
                              );
                        return Container(
                          margin: EdgeInsets.symmetric(vertical: 4.0),
                          child:
                              ReplyContent(replyEvent, lightText: ownMessage),
                        );
                      },
                    ),
                  MessageContent(
                    event,
                    textColor: textColor,
                  ),
                  if (event.type == EventTypes.Encrypted &&
                      event.messageType == MessageTypes.BadEncrypted &&
                      event.content["body"] == DecryptError.UNKNOWN_SESSION)
                    RaisedButton(
                      color: color.withAlpha(100),
                      child: Text(
                        I18n.of(context).requestPermission,
                        style: TextStyle(color: textColor),
                      ),
                      onPressed: () => Matrix.of(context)
                          .tryRequestWithLoadingDialog(event.requestKey()),
                    ),
                  SizedBox(height: 4),
                  _MetaRow(
                    event,
                    ownMessage,
                    textColor,
                    invisible: true,
                  ),
                ],
              ),
              Positioned(
                bottom: 0,
                right: ownMessage ? 0 : null,
                left: !ownMessage ? 0 : null,
                child: _MetaRow(
                  event,
                  ownMessage,
                  textColor,
                ),
              ),
            ],
          ),
        ),
      ),
    ];
    final Widget avatarOrSizedBox = sameSender
        ? SizedBox(width: Avatar.defaultSize)
        : Avatar(
            event.sender.avatarUrl,
            event.sender.calcDisplayname(),
            onTap: () => ImageViewer.show(context, event.sender.avatarUrl),
          );
    if (ownMessage) {
      rowChildren.add(avatarOrSizedBox);
    } else {
      rowChildren.insert(0, avatarOrSizedBox);
    }

    return InkWell(
      onTap: longPressSelect ? () => null : () => onSelect(event),
      splashColor: Theme.of(context).primaryColor.withAlpha(100),
      onLongPress: !longPressSelect ? null : () => onSelect(event),
      child: AnimatedContainer(
        duration: Duration(milliseconds: 300),
        curve: Curves.fastOutSlowIn,
        color: selected
            ? Theme.of(context).primaryColor.withAlpha(100)
            : Theme.of(context).primaryColor.withAlpha(0),
        child: Padding(
          padding: EdgeInsets.only(
              left: 8.0, right: 8.0, bottom: sameSender ? 4.0 : 8.0),
          child: Row(
            crossAxisAlignment: CrossAxisAlignment.end,
            mainAxisAlignment: rowMainAxisAlignment,
            children: rowChildren,
          ),
        ),
      ),
    );
  }
}

class _MetaRow extends StatelessWidget {
  final Event event;
  final bool invisible;
  final bool ownMessage;
  final Color color;

  const _MetaRow(this.event, this.ownMessage, this.color,
      {this.invisible = false, Key key})
      : super(key: key);

  @override
  Widget build(BuildContext context) {
    final String displayname = event.sender.calcDisplayname();
    final bool showDisplayname =
        !ownMessage && event.senderId != event.room.directChatMatrixID;
    return Row(
      mainAxisSize: MainAxisSize.min,
      children: <Widget>[
        if (showDisplayname)
          Text(
            displayname,
            style: TextStyle(
              fontSize: 11,
              fontWeight: FontWeight.bold,
              color: invisible ? Colors.transparent : displayname.color,
            ),
          ),
        if (showDisplayname) SizedBox(width: 4),
        Text(
          event.time.localizedTime(context),
          style: TextStyle(
            color: invisible ? Colors.transparent : color,
            fontSize: 11,
          ),
        ),
        if (ownMessage) SizedBox(width: 2),
        if (ownMessage)
          Icon(
            event.statusIcon,
            size: 12,
            color: invisible ? Colors.transparent : color,
          ),
      ],
    );
  }
}