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dunkirk.sh
1/**
2 * Parse Slack mrkdwn formatting and convert to IRC-friendly plain text
3 */
4export function parseSlackMarkdown(text: string): string {
5 let parsed = text;
6
7 // Replace channel mentions <#C123ABC|channel-name> or <#C123ABC>
8 parsed = parsed.replace(/<#[A-Z0-9]+\|([^>]+)>/g, "#$1");
9 parsed = parsed.replace(/<#[A-Z0-9]+>/g, "#channel");
10
11 // Replace links <http://example.com|text> or <http://example.com>
12 parsed = parsed.replace(/<(https?:\/\/[^|>]+)\|([^>]+)>/g, "$2 ($1)");
13 parsed = parsed.replace(/<(https?:\/\/[^>]+)>/g, "$1");
14
15 // Replace mailto links <mailto:email|text>
16 parsed = parsed.replace(/<mailto:([^|>]+)\|([^>]+)>/g, "$2 <$1>");
17 parsed = parsed.replace(/<mailto:([^>]+)>/g, "$1");
18
19 // Replace special mentions
20 parsed = parsed.replace(/<!here>/g, "@here");
21 parsed = parsed.replace(/<!channel>/g, "@channel");
22 parsed = parsed.replace(/<!everyone>/g, "@everyone");
23
24 // Replace user group mentions <!subteam^GROUP_ID|handle>
25 parsed = parsed.replace(/<!subteam\^[A-Z0-9]+\|([^>]+)>/g, "@$1");
26 parsed = parsed.replace(/<!subteam\^[A-Z0-9]+>/g, "@group");
27
28 // Date formatting - just use fallback text
29 parsed = parsed.replace(/<!date\^[0-9]+\^[^|]+\|([^>]+)>/g, "$1");
30
31 // Replace Slack bold *text* with IRC bold \x02text\x02
32 parsed = parsed.replace(/\*((?:[^\*]|\\\*)+)\*/g, "\x02$1\x02");
33
34 // Replace Slack italic _text_ with IRC italic \x1Dtext\x1D
35 parsed = parsed.replace(/_((?:[^_]|\\_)+)_/g, "\x1D$1\x1D");
36
37 // Replace Slack strikethrough ~text~ with plain text (IRC doesn't support strikethrough well)
38 parsed = parsed.replace(/~((?:[^~]|\\~)+)~/g, "$1");
39
40 // Replace code blocks ```code``` with plain text
41 parsed = parsed.replace(/```([^`]+)```/g, "$1");
42
43 // Replace inline code `code` with plain text
44 parsed = parsed.replace(/`([^`]+)`/g, "$1");
45
46 // Handle block quotes - prefix with >
47 parsed = parsed.replace(/^>/gm, ">");
48
49 // Unescape HTML entities
50 parsed = parsed.replace(/&/g, "&");
51 parsed = parsed.replace(/</g, "<");
52 parsed = parsed.replace(/>/g, ">");
53
54 return parsed;
55}
56
57/**
58 * Parse IRC formatting codes and convert to Slack mrkdwn
59 */
60export function parseIRCFormatting(text: string): string {
61 let parsed = text;
62
63 // IRC color codes - strip them (Slack doesn't support colors in the same way)
64 // \x03 followed by optional color codes
65 parsed = parsed.replace(/\x03(\d{1,2}(,\d{1,2})?)?/g, "");
66
67 // IRC bold \x02text\x02 -> Slack bold *text*
68 parsed = parsed.replace(/\x02([^\x02]*)\x02/g, "*$1*");
69
70 // IRC italic \x1D text\x1D -> Slack italic _text_
71 parsed = parsed.replace(/\x1D([^\x1D]*)\x1D/g, "_$1_");
72
73 // IRC underline \x1F text\x1F -> Slack doesn't have underline, use italic instead
74 parsed = parsed.replace(/\x1F([^\x1F]*)\x1F/g, "_$1_");
75
76 // IRC reverse/inverse \x16 - strip it (Slack doesn't support)
77 parsed = parsed.replace(/\x16/g, "");
78
79 // IRC reset \x0F - strip it
80 parsed = parsed.replace(/\x0F/g, "");
81
82 // Escape special Slack characters that would be interpreted as formatting
83 parsed = parsed.replace(/&/g, "&");
84 parsed = parsed.replace(/</g, "<");
85 parsed = parsed.replace(/>/g, ">");
86
87 return parsed;
88}