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import { h } from 'preact';
import { useState, useEffect } from 'preact/hooks';
import Layout from '../layout';
import css from './css';
import { Links } from './Links';
import { Note } from './Note';
css`
article {
display: flex;
flex-direction: column;
overflow: auto;
flex: 1 1 auto;
padding: 0 2rem;
}
article > h1 {
flex: 0 0 auto;
overflow: hidden;
white-space: nowrap;
text-overflow: ellipsis;
}
article > div {
position: relative;
}
`;
const tmp = document.createElement('span');
export const Discussion = ({
name, items, collapsed,
toggleCollapsed, toggleSelected,
}) => {
const [{ width, height, positions, links }, setState] = useState({
width: 0,
height: 0,
positions: {},
links: [],
});
const layout = new Layout();
const setNodeSize = layout.addNode.bind(layout);
useEffect(() => {
layout.render().then(setState);
}, [ items, collapsed ]);
tmp.innerHTML = name;
name = tmp.innerText;
return (
<article>
<h1>{name}</h1>
<div>
<Links width={width} height={height} links={links} />
<div>
{Object.values(items).map((item) => {
const isCollapsed = collapsed[item.id];
const hidden =
item.inReplyTo.every(p => collapsed[p.id])
&& item.replies.every(c => collapsed[c.id])
&& item.inReplyTo.length !== 0;
if (hidden)
return;
const onlyParent = item.inReplyTo.length === 1 && items[item.inReplyTo[0].id];
for (const reply of item.replies) {
if (isCollapsed && collapsed[reply.id])
continue;
layout.addLink(item.id, reply.id);
}
return (
<Note
{...item}
smallHeader={
onlyParent // only one parent post
&& onlyParent.attributedTo === item.attributedTo // posted by same user
&& onlyParent.published === item.published // in the same second
}
collapsed={isCollapsed}
position={positions[item.id]}
onCollapse={toggleCollapsed}
onSelect={toggleSelected}
onSize={setNodeSize}
/>
);
})}
</div>
</div>
</article>
);
};
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