function addMention(buffer, matches, state) { let username = matches[1] || matches[2]; let tag = "span"; let className = "mention"; let token = new state.Token("mention_open", tag, 1); token.attrs = [["class", className]]; buffer.push(token); token = new state.Token("text", "", 0); token.content = "@" + username; buffer.push(token); token = new state.Token("mention_close", tag, -1); buffer.push(token); } export function setup(helper) { helper.registerOptions((opts, siteSettings) => { opts.features.mentions = !!siteSettings.enable_mentions; opts.features.unicodeUsernames = !!siteSettings.unicode_usernames; }); helper.registerPlugin(md => { const rule = { matcher: mentionRegex(md.options.discourse.features.unicodeUsernames), onMatch: addMention }; md.core.textPostProcess.ruler.push("mentions", rule); }); } function mentionRegex(unicodeUsernames) { if (unicodeUsernames) { try { // Create the regex from a string, because Babel doesn't understand // Unicode property escapes and completly mangles the regexp. const alnum = "\\p{Alphabetic}\\p{Mark}\\p{Decimal_Number}"; return new RegExp( `@([${alnum}_][${alnum}._-]{0,58}[${alnum}])|@([${alnum}_])`, "u" ); } catch (e) { if (!(e instanceof SyntaxError)) throw e; // Fallback for older browsers and MiniRacer. // Created with regexpu-core@4.5.4 by executing the following in nodejs: // // const rewritePattern = require('regexpu-core') // new RegExp(rewritePattern(/[\p{Alphabetic}\p{Mark}\p{Decimal_Number}]/u.source, 'u', { 'unicodePropertyEscape': true })) const alnum = 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.source; return new RegExp( `@((?:_|${alnum})(?:[._-]|${alnum}){0,58}${alnum})|@(?:(_|${alnum}))` ); } } else { return /@(\w[\w.-]{0,58}[^\W_])|@(\w)/; } }