43 lines
987 B
JavaScript
43 lines
987 B
JavaScript
import findAndReplace from 'mdast-util-find-and-replace'
|
|
|
|
// Username may only contain alphanumeric characters or single hyphens, and
|
|
// cannot begin or end with a hyphen*.
|
|
//
|
|
// \* That is: until <https://github.com/remarkjs/remark-github/issues/13>.
|
|
const userGroup = '[\\w_]+'
|
|
|
|
const mentionRegex = new RegExp(
|
|
'@(' + userGroup + '(?:\\/' + userGroup + ')?)',
|
|
'gi'
|
|
)
|
|
|
|
export default function mention (options) {
|
|
return function transformer (tree) {
|
|
findAndReplace(
|
|
tree,
|
|
[
|
|
[mentionRegex, replaceMention]
|
|
],
|
|
{ ignore: ['link', 'linkReference'] }
|
|
)
|
|
}
|
|
|
|
function replaceMention (value, username, match) {
|
|
if (
|
|
/[\w`]/.test(match.input.charAt(match.index - 1)) ||
|
|
/[/\w`]/.test(match.input.charAt(match.index + value.length))
|
|
) {
|
|
return false
|
|
}
|
|
|
|
const node = { type: 'text', value: value }
|
|
|
|
return {
|
|
type: 'link',
|
|
title: null,
|
|
url: '/' + username,
|
|
children: [node]
|
|
}
|
|
}
|
|
}
|