🎯 Mục tiêu

• Send messages, replies, reactions
• Build Slack slash commands
• Discord webhook notifications
• Team communication workflows

1. Slack Integration

1.1 Setup Slack App

1. Go to api.slack.com/apps → Create New App
2. From scratch → Name: "n8n Bot", Workspace: [select]
3. OAuth & Permissions → Add scopes:
   • chat:write — Send messages
   • chat:write.public — Post to any channel
   • channels:history — Read messages
   • users:read — Get user info
   • reactions:write — Add reactions
4. Install to workspace → Copy Bot User OAuth Token
5. In n8n: Add Slack credentials with token

1.2 Send Messages

1Slack node:
2- Operation: Send Message
3- Channel: #general (or channel ID)
4- Text: "Hello from n8n! 🤖"

Rich message with blocks:

1{
2  "blocks": [
3    {
4      "type": "header",
5      "text": {"type": "plain_text", "text": "📊 Daily Report"}
6    },
7    {
8      "type": "section",
9      "fields": [
10        {"type": "mrkdwn", "text": "*Revenue:* $12,345"},
11        {"type": "mrkdwn", "text": "*Orders:* 156"},
12        {"type": "mrkdwn", "text": "*Conversion:* 3.2%"},
13        {"type": "mrkdwn", "text": "*Status:* ✅ On track"}
14      ]
15    },
16    {
17      "type": "actions",
18      "elements": [
19        {
20          "type": "button",
21          "text": {"type": "plain_text", "text": "View Dashboard"},
22          "url": "https://dashboard.example.com"
23        }
24      ]
25    }
26  ]
27}

1.3 Reply to Thread

1Slack node:
2- Operation: Send Message
3- Channel: {{ $json.channel }}
4- Thread TS: {{ $json.ts }}       ← Reply in thread!
5- Text: "Thanks! Working on it."

1.4 React to Messages

1Slack node:
2- Operation: Add Reaction
3- Channel: {{ $json.channel }}
4- Timestamp: {{ $json.ts }}
5- Emoji: "white_check_mark"      ← ✅

1.5 Slash Commands

Setup /report command:

1. Slack App → Slash Commands → Create New
2. Command: /report
3. Request URL: https://your-n8n.com/webhook/slack-report
4. Description: "Generate team report"

1Webhook (/webhook/slack-report)
2→ Parse slash command data
3→ Generate report (AI/DB)
4→ Slack Send Message (respond)

Slash command data:

1{
2  "command": "/report",
3  "text": "weekly sales",
4  "user_id": "U12345",
5  "channel_id": "C12345"
6}

2. Discord Integration

2.1 Setup Discord Bot

1. Go to discord.com/developers → New Application
2. Bot tab → Add Bot → Copy Token
3. OAuth2 → URL Generator:
   • Scopes: bot
   • Permissions: Send Messages, Read Message History
4. Copy invite URL → add bot to server

2.2 Discord via Webhook (Simpler)

1. Server Settings → Integrations → Webhooks
2. New Webhook → Copy URL
3. No bot needed! Direct HTTP POST

1HTTP Request node:
2- Method: POST
3- URL: https://discord.com/api/webhooks/xxx/yyy
4- Body:
5{
6  "content": "🚀 New deployment: v2.1.0",
7  "embeds": [
8    {
9      "title": "Deployment Details",
10      "color": 5763719,
11      "fields": [
12        {"name": "Version", "value": "2.1.0", "inline": true},
13        {"name": "Environment", "value": "Production", "inline": true},
14        {"name": "Status", "value": "✅ Success", "inline": true}
15      ]
16    }
17  ]
18}

2.3 Discord Embeds

1{
2  "embeds": [{
3    "title": "📊 Weekly Report",
4    "description": "Summary for week 3, Jan 2026",
5    "color": 3447003,
6    "fields": [
7      {"name": "Revenue", "value": "$45,678", "inline": true},
8      {"name": "Users", "value": "1,234", "inline": true}
9    ],
10    "footer": {"text": "Generated by n8n Bot"},
11    "timestamp": "2026-01-20T09:00:00.000Z"
12  }]
13}

3. Communication Workflow Patterns

3.1 Daily Standup Bot

1Schedule (9 AM, Mon-Fri)
2→ Slack: Post to #standup
3  "Good morning! 🌅 What are you working on today?"
4→ Wait 2 hours
5→ Slack: Get replies
6→ AI: Summarize standups
7→ Slack: Post summary to #team-leads

3.2 Incident Alert System

1Webhook (monitoring alert)
2→ Classify severity (IF)
3  → P0 (critical):
4    → Slack #incidents (with @channel)
5    → Discord #alerts
6    → PagerDuty (if integrated)
7  → P1 (high):
8    → Slack #incidents (no @channel)
9  → P2 (medium):
10    → Slack #monitoring (threaded)

3.3 Welcome New Members

1Slack Trigger (new member joins #general)
2→ Slack DM to new member:
3  "Welcome! 👋 Here's what you need to know:
4   📚 #handbook — Company docs
5   💬 #random — General chat
6   🆘 #help — Get help"
7→ Slack #team: "Welcome {name}! 🎉"

3.4 Meeting Notes Distribution

1Webhook (meeting notes from Otter.ai / Notion)
2→ AI: Extract action items
3→ Loop each action item
4  → Slack: DM to assigned person
5→ Slack #meeting-notes: Full summary
6→ Notion: Create task pages

3.5 Cross-Platform Sync

1Slack message in #updates
2→ Format for Discord
3→ Discord Webhook (post to #updates)
4 
5And reverse:
6Discord message → Webhook → Format → Slack post

4. Advanced Slack Features

4.1 Interactive Messages

1{
2  "blocks": [
3    {
4      "type": "section",
5      "text": {"type": "mrkdwn", "text": "New lead: *John Doe* from Company X"},
6      "accessory": {
7        "type": "button",
8        "text": {"type": "plain_text", "text": "Accept"},
9        "action_id": "accept_lead",
10        "value": "lead_123"
11      }
12    }
13  ]
14}

When button clicked → Slack sends payload to webhook → n8n processes action.

4.2 Conditional Formatting

1Dựa vào data, thay đổi message format:
2 
3IF revenue > target:
4  color = "good" (green)
5  emoji = "🟢"
6ELSE:
7  color = "danger" (red)
8  emoji = "🔴"

4.3 Scheduled Messages

1Slack node:
2- Operation: Send Message
3- Schedule: post_at (Unix timestamp)
4 
5Useful for: Reminders, scheduled announcements

5. Hands-on Lab

Lab 1: Daily Report Bot

Build Slack bot gửi daily report:

1. Schedule (9 AM)
2. Google Sheets — Get today's data
3. Format — Create Slack Block Kit message
4. Slack — Post to #reports with formatting

Lab 2: Approval Workflow

1. Webhook (new expense request)
2. Slack — Send interactive message to manager
3. Webhook (button click callback)
4. IF approved → Process → Notify requester
5. IF rejected → Notify requester with reason

Lab 3: Multi-Platform Alert

1. Webhook (alert from monitoring)
2. Classify severity
3. Slack — Post with appropriate urgency
4. Discord — Mirror alert
5. Email — If P0, email on-call engineer

📝 Quiz

1. Slack Block Kit dùng để?

   • Chặn tin nhắn spam
   • Tạo rich formatted messages với buttons, fields
   • Block users
   • Encrypt messages

2. Discord Webhook khác Discord Bot ở điểm?

   • Webhook đơn giản hơn, chỉ gửi messages, không cần bot setup
   • Webhook mạnh hơn
   • Bot miễn phí, Webhook trả phí
   • Không khác nhau

3. Slash command trong Slack cần gì?

   • Chỉ cần n8n
   • Premium Slack plan
   • Slack App + Webhook URL trong n8n
   • Discord integration

🎯 Key Takeaways

1. Slack — Messages, threads, reactions, slash commands, interactive buttons
2. Discord — Webhooks (simple) hoặc Bot (full-featured)
3. Block Kit — Rich Slack messages với sections, fields, buttons
4. Patterns — Standup bot, alert system, welcome messages, meeting notes
5. Cross-platform — Sync messages giữa Slack ↔ Discord