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// @flow
import sortByDate from '../sort-by-date';
import type { MessageInfoType } from 'shared/graphql/fragments/message/messageInfo';
type Output = {
...$Exact<MessageInfoType>,
timestamp: string,
};
export const sortAndGroupMessages = (messages: Array<Output>) => {
if (messages.length === 0) return [];
messages = sortByDate(messages, 'timestamp', 'asc');
let masterArray = [];
let newArray = [];
let checkId;
for (let i = 0; i < messages.length; i++) {
// on the first message, get the user id and set it to be checked against
const robo = [
{
id: messages[i].timestamp,
author: {
user: {
id: 'robo',
},
},
timestamp: messages[i].timestamp,
content: {
body: messages[i].timestamp,
},
type: 'timestamp',
},
];
if (i === 0) {
checkId = messages[i].author.user.id;
masterArray.push(robo);
}
const sameUser =
messages[i].author.user.id !== 'robo' &&
messages[i].author.user.id === checkId;
const oldMessage = (current: Object, previous: Object) => {
//=> boolean
/*
Rethink db returns string timestamps. We need to convert them
into a number format so that we can compare message timestamps
more easily. .getTime() will convert something like:
'2017-05-02T18:15:20.769Z'
into:
'1493748920.769'
We then determine if the current message being evaluated is older
than the previous evaulated message by a certain integer to determine
if we should render a timestamp in the UI and create a new bubbleGroup
*/
const c = new Date(current.timestamp).getTime();
const p = new Date(previous.timestamp).getTime();
return c > p + 3600000 * 6; // six hours;
};
// if we are evaulating a bubble from the same user
if (sameUser) {
// if we are still on the first message
if (i === 0) {
// push the message to the array
newArray.push(messages[i]);
} else {
// if we're on to the second message, we need to evaulate the timestamp
// if the second message is older than the first message by our variance
if (oldMessage(messages[i], messages[i - 1])) {
// push the batch of messages to master array
masterArray.push(newArray);
// insert a new robotext timestamp
masterArray.push(robo);
// reset the batch of new messages
newArray = [];
// populate the new batch of messages with this next old message
newArray.push(messages[i]);
} else {
// if the message isn't older than our preferred variance,
// we keep populating the same batch of messages
newArray.push(messages[i]);
}
}
// and maintain the checkid
checkId = messages[i].author.user.id;
// if the next message is from a new user
} else {
// we push the previous user's messages to the masterarray
masterArray.push(newArray);
// if the new users message is older than our preferred variance
if (i > 0 && oldMessage(messages[i], messages[i - 1])) {
// push a robo timestamp
masterArray.push(robo);
newArray = [];
newArray.push(messages[i]);
} else {
// clear the messages array from the previous user
newArray = [];
// and start a new batch of messages from the currently evaluating user
newArray.push(messages[i]);
}
// set a new checkid for the next user
checkId = messages[i].author.user.id;
}
}
// when done, push the final batch of messages to masterArray
// masterArray.push(newArray);
// and return masterArray to the component
masterArray.push(newArray);
return masterArray;
};
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