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MessageList.jsx
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MessageList.jsx
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/*
This component handles:
- displaying a list of 10 messages per page
- pagination logic
- sorting messages by sent date (desc - default, asc) and by sender's name (alpha desc or asc)
Assumptions that may need to be addressed:
- This component assumes it receives a payload containing ALL messages. Of the provided
pagination metadata, per_page and total_entries is used. If each page change requires another
api call to fetch the next set of messages, this logic will need to be refactored, but shouldn't be difficult.
*/
import React, {
useEffect,
useState,
useRef,
useCallback,
useMemo,
} from 'react';
import PropTypes from 'prop-types';
import { chunk } from 'lodash';
import { VaPagination } from '@department-of-veterans-affairs/component-library/dist/react-bindings';
import { focusElement } from '@department-of-veterans-affairs/platform-utilities/ui';
import { recordEvent } from '@department-of-veterans-affairs/platform-monitoring/exports';
import { useDispatch } from 'react-redux';
import MessageListItem from './MessageListItem';
import ThreadListSort from '../ThreadList/ThreadListSort';
import { setSearchPage, setSearchSort } from '../../actions/search';
import { threadSortingOptions } from '../../util/constants';
// Arbitrarily set because the VaPagination component has a required prop for this.
// This value dictates how many pages are displayed in a pagination component
const MAX_PAGE_LIST_LENGTH = 7;
const {
SENT_DATE_ASCENDING,
SENT_DATE_DESCENDING,
DRAFT_DATE_ASCENDING,
DRAFT_DATE_DESCENDING,
RECEPIENT_ALPHA_ASCENDING,
RECEPIENT_ALPHA_DESCENDING,
SENDER_ALPHA_ASCENDING,
SENDER_ALPHA_DESCENDING,
} = threadSortingOptions;
const MessageList = props => {
const dispatch = useDispatch();
const { folder, messages, keyword, isSearch, sortOrder, page } = props;
const perPage = 10;
const totalEntries = messages?.length;
const [currentMessages, setCurrentMessages] = useState([]);
const [displayNums, setDisplayNums] = useState({
from: 0,
to: 0,
label: '',
}); // [from, to]
const paginatedMessages = useRef([]);
const displayingNumberOfMesssagesRef = useRef();
// split messages into pages
const paginateData = useCallback(
data => {
return chunk(data, perPage);
},
[perPage],
);
const fromToNums = useMemo(
() => {
const from = (page - 1) * perPage + 1;
const to = Math.min(page * perPage, messages?.length);
return { from, to };
},
[page, perPage, messages?.length],
);
// sort messages
const sortMessages = useCallback(
data => {
return data.sort((a, b) => {
if (
[SENT_DATE_DESCENDING.value, DRAFT_DATE_DESCENDING.value].includes(
sortOrder,
) ||
(sortOrder === SENDER_ALPHA_ASCENDING.value &&
a.senderName === b.senderName) ||
(sortOrder === SENDER_ALPHA_DESCENDING.value &&
a.senderName === b.senderName) ||
(sortOrder === RECEPIENT_ALPHA_DESCENDING.value &&
a.recipientName === b.recipientName)
) {
return b.sentDate > a.sentDate ? 1 : -1;
}
if (
[SENT_DATE_ASCENDING.value, DRAFT_DATE_ASCENDING.value].includes(
sortOrder,
)
) {
return a.sentDate > b.sentDate ? 1 : -1;
}
if (sortOrder === SENDER_ALPHA_ASCENDING.value) {
return a.senderName.toLowerCase() > b.senderName.toLowerCase()
? 1
: -1;
}
if (sortOrder === SENDER_ALPHA_DESCENDING.value) {
return a.senderName.toLowerCase() < b.senderName.toLowerCase()
? 1
: -1;
}
if (sortOrder === RECEPIENT_ALPHA_ASCENDING.value) {
return a.recipientName.toLowerCase() > b.recipientName.toLowerCase()
? 1
: -1;
}
if (sortOrder === RECEPIENT_ALPHA_DESCENDING.value) {
return a.recipientName.toLowerCase() < b.recipientName.toLowerCase()
? 1
: -1;
}
return 0;
});
},
[sortOrder],
);
// run once on component mount to set initial message and page data
useEffect(
() => {
if (messages?.length) {
paginatedMessages.current = paginateData(sortMessages(messages));
setCurrentMessages(paginatedMessages.current[page - 1]);
}
},
[page, messages, paginateData, sortMessages],
);
// update pagination values on...page change
const onPageChange = pageValue => {
setCurrentMessages(paginatedMessages.current[pageValue - 1]);
dispatch(setSearchPage(pageValue));
focusElement(displayingNumberOfMesssagesRef.current);
};
useEffect(
() => {
// get display numbers
if (fromToNums && messages.length) {
const label = `Showing ${fromToNums.from} - ${fromToNums.to} of ${
messages.length
} found messages`;
setDisplayNums({ ...fromToNums, label });
}
},
[fromToNums, messages.length],
);
const sortCallback = sortOrderValue => {
dispatch(setSearchSort(sortOrderValue));
dispatch(setSearchPage(1));
recordEvent({
event: 'cta-button-click',
'button-type': 'primary',
'button-click-label': 'Sort filtered messages',
});
focusElement(displayingNumberOfMesssagesRef.current);
};
return (
<div className="message-list vads-l-row vads-u-flex-direction--column">
{messages?.length > 1 && (
<ThreadListSort sortOrder={sortOrder} sortCallback={sortCallback} />
)}
<h2 className="sr-only">List of filtered conversations</h2>
<div
role="status"
ref={displayingNumberOfMesssagesRef}
className="vads-u-padding-y--1 vads-l-row vads-u-margin-top--2 vads-u-background-color--gray-light-alt vads-u-padding-left--1"
>
{`Showing ${displayNums.from} to ${
displayNums.to
} of ${totalEntries} messages `}
<span className="sr-only">
{` sorted by ${threadSortingOptions[sortOrder].label}`}
</span>
</div>
{currentMessages?.length > 0 &&
currentMessages.map((message, idx) => (
<MessageListItem
key={`${message.messageId}+${idx}`}
messageId={message.messageId}
senderName={message.senderName}
sentDate={message.sentDate}
subject={message.subject}
readReceipt={message.readReceipt}
attachment={message.attachment}
recipientName={message.recipientName}
keyword={keyword}
category={message.category}
activeFolder={folder}
/>
))}
{page === paginatedMessages.current.length && (
<p className="vads-u-margin-y--3 vads-u-color--gray-medium">
End of {!isSearch ? 'messages in this folder' : 'search results'}
</p>
)}
{currentMessages &&
paginatedMessages.current.length > 1 && (
<VaPagination
onPageSelect={e => onPageChange(e.detail.page)}
page={page}
pages={paginatedMessages.current.length}
max-page-list-length={MAX_PAGE_LIST_LENGTH}
showLastPage
/>
)}
</div>
);
};
export default MessageList;
MessageList.propTypes = {
folder: PropTypes.object,
isSearch: PropTypes.bool,
keyword: PropTypes.string,
messages: PropTypes.array,
page: PropTypes.number,
sortOrder: PropTypes.string,
};