80 lines
2 KiB
TypeScript
80 lines
2 KiB
TypeScript
import React from 'react';
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import LinkifyIt from 'linkify-it';
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import { RenderTextCallbackType } from '../../types/Util';
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import { isLinkSneaky } from '../../../js/modules/link_previews';
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const linkify = LinkifyIt();
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export interface Props {
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text: string;
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/** Allows you to customize now non-links are rendered. Simplest is just a <span>. */
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renderNonLink?: RenderTextCallbackType;
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}
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const SUPPORTED_PROTOCOLS = /^(http|https):/i;
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export class Linkify extends React.Component<Props> {
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public static defaultProps: Partial<Props> = {
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renderNonLink: ({ text }) => text,
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};
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public render():
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| JSX.Element
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| string
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| null
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| Array<JSX.Element | string | null> {
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const { text, renderNonLink } = this.props;
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const matchData = linkify.match(text) || [];
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const results: Array<JSX.Element | string> = [];
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let last = 0;
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let count = 1;
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// We have to do this, because renderNonLink is not required in our Props object,
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// but it is always provided via defaultProps.
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if (!renderNonLink) {
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return null;
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}
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if (matchData.length === 0) {
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return renderNonLink({ text, key: 0 });
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}
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matchData.forEach(
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(match: {
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index: number;
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url: string;
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lastIndex: number;
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text: string;
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}) => {
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if (last < match.index) {
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const textWithNoLink = text.slice(last, match.index);
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count += 1;
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results.push(renderNonLink({ text: textWithNoLink, key: count }));
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}
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const { url, text: originalText } = match;
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count += 1;
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if (SUPPORTED_PROTOCOLS.test(url) && !isLinkSneaky(url)) {
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results.push(
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<a key={count} href={url}>
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{originalText}
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</a>
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);
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} else {
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results.push(renderNonLink({ text: originalText, key: count }));
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}
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last = match.lastIndex;
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}
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);
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if (last < text.length) {
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count += 1;
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results.push(renderNonLink({ text: text.slice(last), key: count }));
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}
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return results;
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}
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}
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