verdnatura-chat/app/lib/methods/loadNextMessages.js

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import EJSON from 'ejson';
import moment from 'moment';
import orderBy from 'lodash/orderBy';
import log from '../../utils/log';
import updateMessages from './updateMessages';
import { getMessageById } from '../database/services/Message';
import { MESSAGE_TYPE_LOAD_NEXT_CHUNK } from '../../constants/messageTypeLoad';
import { generateLoadMoreId } from '../utils';
const COUNT = 50;
export default function loadNextMessages(args) {
return new Promise(async(resolve, reject) => {
try {
const data = await this.methodCallWrapper('loadNextMessages', args.rid, args.ts, COUNT);
let messages = EJSON.fromJSONValue(data?.messages);
messages = orderBy(messages, 'ts');
if (messages?.length) {
const lastMessage = messages[messages.length - 1];
const lastMessageRecord = await getMessageById(lastMessage._id);
if (!lastMessageRecord && messages.length === COUNT) {
const loadMoreItem = {
_id: generateLoadMoreId(lastMessage._id),
rid: lastMessage.rid,
tmid: args.tmid,
ts: moment(lastMessage.ts).add(1, 'millisecond'),
t: MESSAGE_TYPE_LOAD_NEXT_CHUNK
};
messages.push(loadMoreItem);
}
await updateMessages({ rid: args.rid, update: messages, loaderItem: args.loaderItem });
return resolve(messages);
} else {
return resolve([]);
}
} catch (e) {
log(e);
reject(e);
}
});
}