extend markdown support for lbry urls

src/ui/component/common/markdown-preview-internal.jsx

@@ -1,8 +1,9 @@
 // @flow
 import * as React from 'react';
 import remark from 'remark';
-import reactRenderer from 'remark-react';
+import remarkLBRY from 'util/remark-lbry';
 import remarkEmoji from 'remark-emoji';
+import reactRenderer from 'remark-react';
 import ExternalLink from 'component/externalLink';
 import defaultSchema from 'hast-util-sanitize/lib/github.json';
 
@@ -30,7 +31,7 @@ const SimpleLink = (props: SimpleLinkProps) => {
 const schema = { ...defaultSchema };
 
 // Extend sanitation schema to support lbry protocol
-schema.protocols.href[3] = 'lbry';
+schema.protocols.href.push('lbry');
 
 const MarkdownPreview = (props: MarkdownProps) => {
   const { content, promptLinks } = props;
@@ -44,6 +45,7 @@ const MarkdownPreview = (props: MarkdownProps) => {
     <div className="markdown-preview">
       {
         remark()
+          .use(remarkLBRY)
           .use(remarkEmoji)
           .use(reactRenderer, remarkOptions)
           .processSync(content).contents

src/ui/component/externalLink/view.jsx

@@ -20,14 +20,11 @@ class ExternalLink extends React.PureComponent<Props> {
 
   createLink() {
     const { href, title, children, openModal } = this.props;
-
     // Regex for url protocol
     const protocolRegex = new RegExp('^(https?|lbry)+:', 'i');
     const protocol = href ? protocolRegex.exec(href) : null;
-
     // Return plain text if no valid url
     let element = <span>{children}</span>;
-
     // Return external link if protocol is http or https
     if (protocol && (protocol[0] === 'http:' || protocol[0] === 'https:')) {
       element = (
@@ -41,7 +38,6 @@ class ExternalLink extends React.PureComponent<Props> {
         />
       );
     }
-
     // Return local link if protocol is lbry uri
     if (protocol && protocol[0] === 'lbry:' && isURIValid(href)) {
       element = <Button button="link" title={title || href} label={children} navigate={href} />;

src/ui/util/remark-lbry.js

@@ -0,0 +1,68 @@
+import { parseURI } from 'lbry-redux';
+
+const protocol = 'lbry://';
+const locateURI = (value, fromIndex) => value.indexOf(protocol, fromIndex);
+const locateMention = (value, fromIndex) => value.indexOf('@', fromIndex);
+
+// Generate a valid markdown link
+const createURI = (text, uri, addProtocol = true) => ({
+  type: 'link',
+  url: (addProtocol ? protocol : '') + uri,
+  children: [{ type: 'text', value: text }],
+});
+
+// Generate a markdown link from channel name
+function tokenizeMention(eat, value, silent) {
+  const match = /^@(\w+)/.exec(value);
+
+  if (match) {
+    const text = match[0];
+    const href = match[0];
+    return silent ? true : eat(text)(createURI(text, href));
+  }
+}
+
+// Generate a markdown link from lbry url
+function tokenizeURI(eat, value, silent) {
+  const match = /^(lbry:\/\/)+([A-z0-9-_#@])+/.exec(value);
+
+  if (match) {
+    try {
+      const text = match[0];
+      const uri = parseURI(text, true);
+      // Create channel link
+      if (uri.isChannel) {
+        return eat(text)(createURI(uri.claimName, uri.claimName));
+      }
+      // Create uri link
+      return eat(text)(createURI(text, text, false));
+    } catch (err) {
+      // Silent errors: console.error(err)
+    }
+  }
+}
+
+// Configure tokenizer for lbry urls
+tokenizeURI.locator = locateURI;
+tokenizeURI.notInLink = true;
+tokenizeURI.notInBlock = true;
+
+// Configure tokenizer for lbry channels
+tokenizeMention.locator = locateMention;
+tokenizeMention.notInLink = true;
+tokenizeMention.notInBlock = true;
+
+// Main module
+export default function remarkLBRY() {
+  const Parser = this.Parser;
+  const tokenizers = Parser.prototype.inlineTokenizers;
+  const methods = Parser.prototype.inlineMethods;
+
+  // Add an inline tokenizer (defined in the following example).
+  tokenizers.uri = tokenizeURI;
+  tokenizers.mention = tokenizeMention;
+
+  // Run it just before `text`.
+  methods.splice(methods.indexOf('text'), 0, 'uri');
+  methods.splice(methods.indexOf('text'), 0, 'mention');
+}