Models

user_profile.dart

class UserProfile {
  String? uid;
  String? name;
  String? pfpURL;

  UserProfile({
    required this.uid,
    required this.name,
    required this.pfpURL,
  });

  UserProfile.fromJson(Map<String, dynamic> json) {
    uid = json['uid'];
    name = json['name'];
    pfpURL = json['pfpURL'];
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = <String, dynamic>{};
    data['name'] = name;
    data['pfpURL'] = pfpURL;
    data['uid'] = uid;
    return data;
  }
}

message.dart

import 'package:cloud_firestore/cloud_firestore.dart';

enum MessageType { Text, Image }

class Message {
  String? senderID;
  String? content;
  MessageType? messageType;
  Timestamp? sentAt;

  Message({
    required this.senderID,
    required this.content,
    required this.messageType,
    required this.sentAt,
  });

  Message.fromJson(Map<String, dynamic> json) {
    senderID = json['senderID'];
    content = json['content'];
    sentAt = json['sentAt'];
    messageType = MessageType.values.byName(json['messageType']);
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = <String, dynamic>{};
    data['senderID'] = senderID;
    data['content'] = content;
    data['sentAt'] = sentAt;
    data['messageType'] = messageType!.name;
    return data;
  }
}

chat.dart

import 'package:firebase_chat_app/models/message.dart';

class Chat {
  String? id;
  List<String>? participants;
  List<Message>? messages;

  Chat({
    required this.id,
    required this.participants,
    required this.messages,
  });

  Chat.fromJson(Map<String, dynamic> json) {
    id = json['id'];
    participants = List<String>.from(json['participants']);
    messages =
        List.from(json['messages']).map((m) => Message.fromJson(m)).toList();
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = <String, dynamic>{};
    data['id'] = id;
    data['participants'] = participants;
    data['messages'] = messages?.map((m) => m.toJson()).toList() ?? [];
    return data;
  }
}

Utils

consts.dart

final RegExp EMAIL_VALIDATION_REGEX =
    RegExp(r"^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$");

final RegExp PASSWORD_VALIDATION_REGEX =
    RegExp(r"^(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[a-zA-Z]).{8,}$");

final RegExp NAME_VALIDATION_REGEX = RegExp(r"\b([A-ZÀ-ÿ][-,a-z. ']+[ ]*)+");

final String PLACEHOLDER_PFP =
    "https://t3.ftcdn.net/jpg/05/16/27/58/360_F_516275801_f3Fsp17x6HQK0xQgDQEELoTuERO4SsWV.jpg";