manifold/web/components/linkify.tsx
2021-12-31 13:41:41 -06:00

41 lines
1.0 KiB
TypeScript

import { Fragment } from 'react'
import { SiteLink } from './site-link'
// Return a JSX span, linkifying @username, #hashtags, and https://...
export function Linkify(props: { text: string }) {
const { text } = props
const regex = /(?:^|\s)(?:[@#][a-z0-9_]+|https?:\/\/\S+)/gi
const matches = text.match(regex) || []
const links = matches.map((match) => {
// Matches are in the form: " @username" or "https://example.com"
const whitespace = match.match(/^\s/)
const symbol = match.trim().substring(0, 1)
const tag = match.trim().substring(1)
const href =
{
'@': `/${tag}`,
'#': `/tag/${tag}`,
}[symbol] ?? match
return (
<>
{whitespace}
<SiteLink className="text-indigo-700" href={href}>
{symbol}
{tag}
</SiteLink>
</>
)
})
return (
<span>
{text.split(regex).map((part, i) => (
<Fragment key={i}>
{part}
{links[i]}
</Fragment>
))}
</span>
)
}