I have an array of messages which are like the following:
[
{ message: 'This is message', to: 4, from: 1},
{ message: 'This is response message', to: 1, from: 4 },
{ message: 'This is ANOTHER message with different sender', to: 1, from: 2 },
{ message: 'This is RESPONSE message to different sender', to: 2, from: 1 },
]
I have all the messages, but they are not grouped by the user-to-user conversation. What I want is to group the messages (inside an array) by to and from.
How can I achieve the following outcome:
[
[
{ message: 'This is message', to: 4, from: 1},
{ message: 'This is response message', to: 1, from: 4 },
],
[
{ message: 'This is ANOTHER message with different sender', to: 1, from: 2 },
{ message: 'This is RESPONSE message to different sender', to: 2, from: 1 }
],
]
In short:
Current structure is
// Individually structured messages
[message, message, message, message]
Desired outcome:
// Grouped by user-to-user conversation
// [[Conversation1], [Conversation2]]
[[message, message], [message,message]]
I have tried using lodash with return this._.values(this._.groupBy(this.messages, 'to')), but since I need to group them by two criteria, I didn't manage to come up with the logic.
Javascript implementation with Array.reduce and Array.find
const messages = [
{ message: 'This is message', to: 4, from: 1},
{ message: 'This is response message', to: 1, from: 4 },
{ message: 'This is ANOTHER message with different sender', to: 1, from: 2 },
{ message: 'This is RESPONSE message to different sender', to: 2, from: 1 },
];
const groupedMessage = messages.reduce((acc, curr) => {
const node = acc.find(item => item.find((msg) => (msg.from === curr.to && msg.to === curr.from) || (msg.from === curr.from && msg.to === curr.to)));
node ? node.push(curr) : acc.push([curr]);
return acc;
}, []);
console.log(groupedMessage);