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dunkirk.sh
1import { getCachetUser } from "./cachet";
2import { userMappings } from "./db";
3
4/**
5 * Converts IRC @mentions and nick: mentions to Slack user mentions
6 */
7export function convertIrcMentionsToSlack(messageText: string): string {
8 let result = messageText;
9
10 // Find all @mentions and nick: mentions in the IRC message
11 const atMentionPattern = /@(\w+)/g;
12 const nickMentionPattern = /(\w+):/g;
13
14 const atMentions = Array.from(result.matchAll(atMentionPattern));
15 const nickMentions = Array.from(result.matchAll(nickMentionPattern));
16
17 for (const match of atMentions) {
18 const mentionedNick = match[1] as string;
19 const mentionedUserMapping = userMappings.getByIrcNick(mentionedNick);
20 if (mentionedUserMapping) {
21 result = result.replace(
22 match[0],
23 `<@${mentionedUserMapping.slack_user_id}>`,
24 );
25 }
26 }
27
28 for (const match of nickMentions) {
29 const mentionedNick = match[1] as string;
30 const mentionedUserMapping = userMappings.getByIrcNick(mentionedNick);
31 if (mentionedUserMapping) {
32 result = result.replace(
33 match[0],
34 `<@${mentionedUserMapping.slack_user_id}>:`,
35 );
36 }
37 }
38
39 return result;
40}
41
42/**
43 * Converts Slack user mentions to IRC @mentions
44 * Priority: user mappings > display name from mention > Cachet lookup
45 */
46export async function convertSlackMentionsToIrc(
47 messageText: string,
48): Promise<string> {
49 let result = messageText;
50 const mentionRegex = /<@(U[A-Z0-9]+)(\|([^>]+))?>/g;
51 const mentions = Array.from(result.matchAll(mentionRegex));
52
53 for (const match of mentions) {
54 const userId = match[1] as string;
55 const displayName = match[3] as string; // The name part after |
56
57 // Check if user has a mapped IRC nick
58 const mentionedUserMapping = userMappings.getBySlackUser(userId);
59 if (mentionedUserMapping) {
60 result = result.replace(match[0], `@${mentionedUserMapping.irc_nick}`);
61 } else {
62 // Try Cachet lookup if enabled
63 if (process.env.CACHET_ENABLED === "true") {
64 const data = await getCachetUser(userId);
65 if (data) {
66 result = result.replace(match[0], `@${data.displayName}`);
67 continue;
68 }
69 }
70
71 // Fallback to display name from the mention format <@U123|name>
72 if (displayName) {
73 result = result.replace(match[0], `@${displayName}`);
74 }
75 }
76 }
77
78 return result;
79}