Discord Bot - limit to one reaction - node.js

Question

I am currently working on discord bot and faced a problem where I need to limit reactions. I am trying to achieve the following goal - if the user selects reaction it should be replaced with the newest reaction. Can someone advise on how to do it?
Here is my screenshot and code of what I have at this moment.
My code:
client.on('raw', event => {
console.log(event);
const eventName = event.t;
if(eventName === 'MESSAGE_REACTION_ADD') {
if(event.d.message_id === '70цw3748527414706191') {
var reactionChannel = client.channels.get(event.d.channel_id);
if(reactionChannel.messages.has(event.d.message_id))
return;
else {
reactionChannel.fetchMessage(event.d.message_id)
.then(msg => {
var msgReaction = msg.reactions.get(event.d.emoji.name + ":" + event.d.emoji.id);
var user = client.users.get(event.d.user_id);
client.emit('messageReactionAdd', msgReation, user);
})
.catch(err => console.log(err));
}
}
}
else if(eventName === 'MESSAGE_REACTION_ADD') {
if(event.d.message_id === '703748527414706191') {
var reactionChannel = client.channels.get(event.d.channel_id);
if(reactionChannel.messages.has(event.d.message_id))
return;
else {
reactionChannel.fetchMessage(event.d.message_id)
.then(msg => {
var msgReaction = msg.reactions.get(event.d.emoji.name + ":" + event.d.emoji.id);
var user = client.users.get(event.d.user_id);
client.emit('messageReactionRemove', msgReation, user);
})
.catch(err => console.log(err));
}
}
}
});
client.on('messageReactionAdd', (messageReaction, user) => {
var roleName = messageReaction.emoji.name;
console.log(roleName);
var role = messageReaction.message.guild.roles.find(role => role.name.toLowerCase() ===
roleName.toLowerCase());
if(role) {
var member = messageReaction.message.guild.members.find(member => member.id === user.id);
if(member) {
member.addRole(role.id);
console.log("Success");
}
}
});
client.on('messageReactionRemove', (messageReaction, user) => {
var roleName = messageReaction.emoji.name;
var role = messageReaction.message.guild.roles.find(role => role.name.toLowerCase() ===
roleName.toLowerCase());
if(role) {
var member = messageReaction.message.guild.members.find(member => member.id === user.id);
if(member) {
member.removeRole(role.id);
console.log("Success");
}
}
});
Thank you for your guidance!

Answer 1

You can check on messageReactionAdd, if they already have another color-role, with this you would need either each color role to have a prefix or to have an array of what color-roles exist.
heres a start
client.on('messageReactionAdd', (reaction, user) => {
const guild = reaction.message.guild;
const roleName = reaction.emoji.name.toLowerCase();
console.log(roleName);
const role = guild.roles.cache.find(r => r.name.toLowerCase() === roleName);
if (role) {
const member = guild.members.cache.find(m => m.id === user.id);
//check if they already have a color role
if (alreadyColorRole) {
//either make it so he cant react until he unreacts to the role
//or automatically remove the other reaction.
reaction.remove();
} else {
member.addRole(role.id);
console.log("Success");
}
}
});