I am currently developing a chat application which allows users to chat with another random user by clicking a button. I have added the following package to my app: https://docs.flyer.chat/flutter/firebase/firebase-usage

My database looks as follows:

collection: rooms document: chatroom1 subcollection: messages

collection: users document: uid1 (which then includes fields like username, gender etc.)

So now I do not know how to get two random users from my users collection and create a chat room for them, in order to allow them to chat. How can I code the matching? And how do I create a chatroom for each random match? Is there a simple way?

CodePudding user response：

First You need to create a list of users(uid or the doc_id) like this

final list = ['user1', 'user2', 'user3', 'user4', 'user5'];

then when you are trying to start chat so you can select the opponent by using this method

// generates a new Random object

final _random = new Random();

// generate a random index based on the list length // and use it to retrieve the element

var element = list[_random.nextInt(userList.length)];

so it is just a reference for you for getting randow user. Hope you understand

CodePudding user response：

There is no simple way to do this. You will need to query your users collection to get a list of all users. Then, you will need to randomly select two users from that list and create a chat room for them.