dunkirk.sh
this repo has no description
feat: add support for images
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.env.example
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.env.example
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README.md
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README.md
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# Admin users (comma-separated Slack user IDs)
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ADMINS=U1234567890
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# Hack Club CDN Token (for file uploads)
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CDN_TOKEN=your-cdn-token-here
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# Server Configuration (optional)
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PORT=3000
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```
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See `.env.example` for a template.
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### Slash Commands
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The bridge provides interactive slash commands for managing mappings:
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- `/irc-bridge-channel` - Bridge current Slack channel to an IRC channel
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- `/irc-unbridge-channel` - Remove bridge from current channel
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- `/irc-bridge-user` - Link your Slack account to an IRC nickname
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- `/irc-unbridge-user` - Remove your IRC nickname link
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- `/irc-bridge-list` - List all channel and user bridges
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### Managing Channel and User Mappings
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The bridge connects to `irc.hackclub.com:6667` (no TLS) and forwards messages bidirectionally based on channel mappings:
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- **IRC → Slack**: Messages from mapped IRC channels appear in their corresponding Slack channels
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- Image URLs are automatically displayed as inline attachments
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- IRC mentions (`@nick` or `nick:`) are converted to Slack mentions for mapped users
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- IRC formatting codes are converted to Slack markdown
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- **Slack → IRC**: Messages from mapped Slack channels are sent to their corresponding IRC channels
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- User mappings allow custom IRC nicknames for specific Slack users
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- Slack mentions are converted to `@displayName` format using Cachet
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- Slack markdown is converted to IRC formatting codes
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- File attachments are uploaded to Hack Club CDN and URLs are shared
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- **User mappings** allow custom IRC nicknames for specific Slack users and enable proper mentions both ways
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The bridge ignores its own messages and bot messages to prevent loops.
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slack-manifest.yaml
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slack-manifest.yaml
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-11
src/index.ts
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src/index.ts
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iconUrl = getAvatarForNick(nick);
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}
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// Parse IRC mentions and convert to Slack mentions
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let messageText = parseIRCFormatting(text);
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// Extract image URLs from the message
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const imagePattern = /https?:\/\/[^\s]+\.(?:png|jpg|jpeg|gif|webp|bmp|svg)(?:\?[^\s]*)?/gi;
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const imageUrls = Array.from(messageText.matchAll(imagePattern));
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// Find all @mentions and nick: mentions in the IRC message
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const atMentionPattern = /@(\w+)/g;
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const nickMentionPattern = /(\w+):/g;
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const atMentions = Array.from(messageText.matchAll(atMentionPattern));
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const nickMentions = Array.from(messageText.matchAll(nickMentionPattern));
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for (const match of atMentions) {
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const mentionedNick = match[1] as string;
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const mentionedUserMapping = userMappings.getByIrcNick(mentionedNick);
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if (mentionedUserMapping) {
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messageText = messageText.replace(match[0], `<@${mentionedUserMapping.slack_user_id}>`);
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}
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}
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for (const match of nickMentions) {
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const mentionedNick = match[1] as string;
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const mentionedUserMapping = userMappings.getByIrcNick(mentionedNick);
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if (mentionedUserMapping) {
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messageText = messageText.replace(match[0], `<@${mentionedUserMapping.slack_user_id}>:`);
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}
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}
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try {
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await slackClient.chat.postMessage({
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token: process.env.SLACK_BOT_TOKEN,
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channel: mapping.slack_channel_id,
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text: parseIRCFormatting(text),
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username: displayName,
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icon_url: iconUrl,
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unfurl_links: false,
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unfurl_media: false,
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});
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// If there are image URLs, send them as attachments
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if (imageUrls.length > 0) {
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const attachments = imageUrls.map((match) => ({
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image_url: match[0],
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fallback: match[0],
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}));
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await slackClient.chat.postMessage({
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token: process.env.SLACK_BOT_TOKEN,
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channel: mapping.slack_channel_id,
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text: messageText,
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username: displayName,
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icon_url: iconUrl,
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attachments: attachments,
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unfurl_links: false,
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unfurl_media: false,
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});
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} else {
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await slackClient.chat.postMessage({
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token: process.env.SLACK_BOT_TOKEN,
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channel: mapping.slack_channel_id,
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text: messageText,
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username: displayName,
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icon_url: iconUrl,
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unfurl_links: false,
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unfurl_media: false,
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});
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}
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console.log(`IRC → Slack: <${nick}> ${text}`);
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} catch (error) {
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console.error("Error posting to Slack:", error);
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});
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// Slack event handlers
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slackApp.event("message", async ({ payload }) => {
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if (payload.subtype) return;
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slackApp.event("message", async ({ payload, context }) => {
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// Ignore bot messages and threaded messages
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if (payload.subtype && payload.subtype !== "file_share") return;
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if (payload.bot_id) return;
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if (payload.user === botUserId) return;
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if (payload.thread_ts) return;
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ircClient.say(mapping.irc_channel, message);
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console.log(`Slack → IRC: ${message}`);
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// Handle file uploads
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if (payload.files && payload.files.length > 0) {
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try {
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// Extract private file URLs
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const fileUrls = payload.files.map((file) => file.url_private);
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// Upload to Hack Club CDN
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const response = await fetch("https://cdn.hackclub.com/api/v3/new", {
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method: "POST",
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headers: {
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Authorization: `Bearer ${process.env.CDN_TOKEN}`,
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"X-Download-Authorization": `Bearer ${process.env.SLACK_BOT_TOKEN}`,
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"Content-Type": "application/json",
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},
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body: JSON.stringify(fileUrls),
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});
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if (response.ok) {
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const data = await response.json();
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// Send each uploaded file URL to IRC
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for (const file of data.files) {
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const fileMessage = `<${username}> ${file.deployedUrl}`;
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ircClient.say(mapping.irc_channel, fileMessage);
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console.log(`Slack → IRC (file): ${fileMessage}`);
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}
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} else {
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console.error("Failed to upload files to CDN:", response.statusText);
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}
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} catch (error) {
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console.error("Error uploading files to CDN:", error);
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}
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}
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} catch (error) {
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console.error("Error handling Slack message:", error);
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}