150 lines
3.7 KiB
JavaScript
150 lines
3.7 KiB
JavaScript
import { parseURI } from 'lbry-redux';
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import visit from 'unist-util-visit';
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const protocol = 'lbry://';
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const uriRegex = /(lbry:\/\/)[^\s()"]*/g;
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const mentionToken = '@';
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const mentionTokenCode = 64; // @
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const mentionRegex = /@[^\s()"]*/gm;
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const invalidRegex = /[-_.+=?!@#$%^&*:;,{}<>\w/\\]/;
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// Find channel mention
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function locateMention(value, fromIndex) {
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var index = value.indexOf(mentionToken, fromIndex);
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// Skip invalid mention
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if (index > 0 && invalidRegex.test(value.charAt(index - 1))) {
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return locateMention(value, index + 1);
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}
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return index;
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}
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// Find claim url
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function locateURI(value, fromIndex) {
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var index = value.indexOf(protocol, fromIndex);
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// Skip invalid uri
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if (index > 0 && invalidRegex.test(value.charAt(index - 1))) {
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return locateMention(value, index + 1);
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}
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return index;
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}
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// Generate a valid markdown link
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const createURI = (text, uri, embed = false) => ({
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type: 'link',
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url: (uri.startsWith(protocol) ? '' : protocol) + uri,
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data: {
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// Custom attribute
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hProperties: { embed },
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},
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children: [{ type: 'text', value: text }],
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});
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const validateURI = (match, eat, self) => {
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if (match) {
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try {
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const text = match[0];
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const uri = parseURI(text);
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const isValid = uri && uri.claimName;
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const isChannel = uri.isChannel && uri.path === uri.claimName;
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if (isValid) {
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// Create channel link
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if (isChannel) {
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return eat(text)(createURI(uri.claimName, text, false));
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}
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// Create claim link
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return eat(text)(createURI(text, text, true));
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}
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} catch (err) {
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// Silent errors: console.error(err)
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}
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}
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};
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// Generate a markdown link from channel name
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function tokenizeMention(eat, value, silent) {
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if (silent) {
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return true;
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}
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const match = value.match(mentionRegex);
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return validateURI(match, eat, self);
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}
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// Generate a markdown link from lbry url
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function tokenizeURI(eat, value, silent) {
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if (silent) {
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return true;
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}
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const match = value.match(uriRegex);
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return validateURI(match, eat);
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}
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// Configure tokenizer for lbry urls
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tokenizeURI.locator = locateURI;
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tokenizeURI.notInList = true;
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tokenizeURI.notInLink = true;
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tokenizeURI.notInBlock = true;
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// Configure tokenizer for lbry channels
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tokenizeMention.locator = locateMention;
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tokenizeMention.notInList = true;
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tokenizeMention.notInLink = true;
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tokenizeMention.notInBlock = true;
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const visitor = (node, index, parent) => {
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if (node.type === 'link' && parent && parent.type === 'paragraph') {
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try {
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const uri = parseURI(node.url);
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const isValid = uri && uri.claimName;
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const isChannel = uri.isChannel && uri.path === uri.claimName;
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if (isValid && !isChannel) {
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if (!node.data || !node.data.hProperties) {
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// Create new node data
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node.data = {
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hProperties: { embed: true },
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};
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} else if (node.data.hProperties) {
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// Don't overwrite current attributes
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node.data.hProperties = {
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embed: true,
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...node.data.hProperties,
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};
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}
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}
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} catch (err) {
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// Silent errors: console.error(err)
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}
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}
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};
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// transform
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const transform = tree => {
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visit(tree, ['link'], visitor);
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};
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export const formatedLinks = () => transform;
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// Main module
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export function inlineLinks() {
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const Parser = this.Parser;
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const tokenizers = Parser.prototype.inlineTokenizers;
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const methods = Parser.prototype.inlineMethods;
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// Add an inline tokenizer (defined in the following example).
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tokenizers.uri = tokenizeURI;
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tokenizers.mention = tokenizeMention;
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// Run it just before `text`.
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methods.splice(methods.indexOf('text'), 0, 'uri');
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methods.splice(methods.indexOf('text'), 0, 'mention');
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}
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