nasso.dev
my fork of the bluesky client
1interface FoundMention {
2 value: string
3 index: number
4}
5
6export function getMentionAt(
7 text: string,
8 cursorPos: number,
9): FoundMention | undefined {
10 let re = /(^|\s)@([a-z0-9.]*)/gi
11 let match
12 while ((match = re.exec(text))) {
13 const spaceOffset = match[1].length
14 const index = match.index + spaceOffset
15 if (
16 cursorPos >= index &&
17 cursorPos <= index + match[0].length - spaceOffset
18 ) {
19 return {value: match[2], index}
20 }
21 }
22 return undefined
23}
24
25export function insertMentionAt(
26 text: string,
27 cursorPos: number,
28 mention: string,
29) {
30 const target = getMentionAt(text, cursorPos)
31 if (target) {
32 return `${text.slice(0, target.index)}@${mention} ${text.slice(
33 target.index + target.value.length + 1, // add 1 to include the "@"
34 )}`
35 }
36 return text
37}