comunicmobile/lib/ui/tiles/conversation_message_tile.dart

import 'package:comunic/models/conversation_message.dart';
import 'package:comunic/models/user.dart';
import 'package:comunic/utils/account_utils.dart';
import 'package:comunic/utils/date_utils.dart';
import 'package:flutter/material.dart';

/// Conversation message tile
///
/// @author Pierre HUBERT

class ConversationMessageTile extends StatelessWidget {
  final ConversationMessage message;
  final User userInfo;
  final bool isLastMessage;

  const ConversationMessageTile(
      {Key key,
      @required this.message,
      @required this.userInfo,
      @required this.isLastMessage})
      : assert(message != null),
        assert(userInfo != null),
        assert(isLastMessage != null),
        super(key: key);

  /// Build message date
  Widget _buildMessageDate() {
    return isLastMessage
        ? Container(
            margin: EdgeInsets.only(top: 5.0),
            child: Text(
              dateTimeToString(message.date),
              style: TextStyle(color: Colors.black54, fontSize: 12.0),
            ),
          )
        : Container();
  }

  /// Build a message of the current user
  Widget _buildRightMessage() {
    return Container(
      margin: EdgeInsets.only(right: 10.0, bottom: isLastMessage ? 20.0 : 10.0),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.end,
        children: <Widget>[
          Column(
            children: <Widget>[
              // Text message
              Container(
                child: Text(
                  message.message,
                  textAlign: TextAlign.justify,
                  style: TextStyle(color: Colors.white),
                ),
                padding: EdgeInsets.fromLTRB(15.0, 10.0, 15.0, 10.0),
                width: 200.0,
                decoration: BoxDecoration(
                  color: Colors.blueAccent,
                  borderRadius: BorderRadius.circular(8.0),
                ),
              ),

              // Date
              _buildMessageDate()
            ],
          ),
        ],
      ),
    );
    // Text
  }

  /// Build a message of a peer user
  Widget _buildLeftMessage() {
    return Container(
      margin: EdgeInsets.only(left: 10.0, bottom: isLastMessage ? 20.0 : 10.0),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.start,
        children: <Widget>[
          Column(
            children: <Widget>[
              // Text message
              Container(
                child: Text(
                  message.message,
                  textAlign: TextAlign.justify,
                ),
                padding: EdgeInsets.fromLTRB(15.0, 10.0, 15.0, 10.0),
                width: 200.0,
                decoration: BoxDecoration(
                  color: Colors.black12,
                  borderRadius: BorderRadius.circular(8.0),
                ),
              ),

              // Date
              _buildMessageDate()
            ],
          ),
        ],
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return userID() == message.userID
        ? _buildRightMessage()
        : _buildLeftMessage();
  }
}