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import React, { useState, useEffect } from 'react';
import { Link } from 'react-router-dom';
import qs from 'qs';
import moment from 'moment';
import Message from './Message';
import Spinner from './Spinner';
import UserInfo from './UserInfo';
import { getMessages } from '../api';
/**
* @typedef {Object} Query
* @property {string} baseUrl
* @property {Object=} search
* @property {string} pageParam
*/
/**
* @typedef {Object} PageProps
* @property {import('history').History} history
* @property {import('history').Location} location
* @property {import('react-router').match} match
* @property {string} search
* @property {import('../api').SecureUser} visitor
* @property {import('../api').Message[]} msgs
*/
/**
* @param {PageProps} props
*/
export function Discover(props) {
let search = qs.parse(props.location.search.substring(1));
const query = {
baseUrl: '/api/messages',
search: search,
pageParam: search.search ? 'page' : 'before_mid'
};
return (<Feed authRequired={false} query={query} {...props} />);
}
/**
* @param {PageProps} props
*/
export function Discussions(props) {
const query = {
baseUrl: '/api/messages/discussions',
pageParam: 'to'
};
return (<Feed authRequired={false} query={query} {...props} />);
}
/**
* @param {PageProps} props
*/
export function Blog(props) {
const { user } = props.match.params;
let search = qs.parse(props.location.search.substring(1));
search.uname = user;
const query = {
baseUrl: '/api/messages',
search: search,
pageParam: search.search ? 'page' : 'before_mid'
};
return (
<>
<div className="msg-cont">
<UserInfo user={user} />
</div>
<Feed authRequired={false} query={query} {...props} />
</>
);
}
/**
* @param {PageProps} props
*/
export function Tag(props) {
const { tag } = props.match.params;
const query = {
baseUrl: '/api/messages',
search: {
tag: tag
},
pageParam: 'before_mid'
};
return (<Feed authRequired={false} query={query} {...props} />);
}
/**
* @param {PageProps} props
*/
export function Home(props) {
const query = {
baseUrl: '/api/home',
pageParam: 'before_mid'
};
return (<Feed authRequired={true} query={query} {...props} />);
}
/**
* @param {{
authRequired?: boolean,
visitor: import('../api').SecureUser,
history: import('history').History,
location: import('history').Location,
msgs: import('../api').Message[],
query: Query
}} props
*/
function Feed(props) {
const [msgs, setMsgs] = useState([]);
const [loading, setLoading] = useState(true);
const [nextpage, setNextpage] = useState(null);
const [error, setError] = useState(false);
useEffect(() => {
let loadMessages = (hash = '', filter = '') => {
document.body.scrollTop = 0;
document.documentElement.scrollTop = 0;
setMsgs([]);
setLoading(true);
const filterParams = qs.parse(filter);
let params = Object.assign({}, filterParams || {}, props.query.search || {});
let url = props.query.baseUrl;
if (hash) {
params.hash = hash;
}
if (!params.hash && props.authRequired) {
props.history.push('/');
}
getMessages(url, params)
.then(response => {
const { data } = response;
const { pageParam } = props.query;
const lastMessage = data.slice(-1)[0] || {};
const nextpage = getPageParam(pageParam, lastMessage, filterParams);
setMsgs(data);
setLoading(false);
setNextpage(nextpage);
}).catch(ex => {
setError(true);
});
};
loadMessages(props.visitor.hash, props.location.search.substring(1));
}, [props]);
let getPageParam = (pageParam, lastMessage, filterParams) => {
const pageValue = pageParam === 'before_mid' ? lastMessage.mid : pageParam === 'page' ? (Number(filterParams.page) || 0) + 1 : moment.utc(lastMessage.updated).valueOf();
let newFilter = { ...filterParams };
newFilter[pageParam] = pageValue;
return `?${qs.stringify(newFilter)}`;
};
const { tag } = qs.parse(location.search.substring(1)) || {};
const nodes = (
<>
{
tag && (
<p className="page">
<Link to={{ pathname: `/tag/${tag}` }}>
<span>← All posts with tag </span><b>{tag}</b>
</Link>
</p>
)
}
{
msgs.map(msg =>
<Message key={msg.mid} data={msg} visitor={props.visitor} />)
}
{
msgs.length >= 20 && (
<p className="page">
<Link to={{ pathname: props.location.pathname, search: nextpage }} rel="prev">Next →</Link>
</p>
)
}
</>
);
return msgs.length > 0 ? (
<div className="msgs">{nodes}</div>
) : error ? <div>error</div> : loading ? <div className="msgs"><Spinner /><Spinner /><Spinner /><Spinner /></div> : <div>No more messages</div>;
}
|
