#228 - Basic Hello World Slack Command Bot

node/slack-command-bot/.gitignore

@@ -0,0 +1,130 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+web_modules/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional stylelint cache
+.stylelintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+out
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+.temp
+.cache
+
+# Docusaurus cache and generated files
+.docusaurus
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# yarn v2
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*

node/slack-command-bot/.prettierrc.json

@@ -0,0 +1,6 @@
+{
+  "trailingComma": "es5",
+  "tabWidth": 2,
+  "semi": true,
+  "singleQuote": true
+}

node/slack-command-bot/README.md

@@ -0,0 +1,47 @@
+# 🤖 Node.js Slack Command Bot Function
+
+Simple command bot using Slack API
+
+## 🧰 Usage
+
+### POST /
+
+A Endpoint for you Slack Command That Returns a Hello World! Message as Response.
+
+#### Parameters
+
+| Name                      | Description                      | Location | Type   | Sample Value                                                                              |
+| ------------------------- | -------------------------------- | -------- | ------ | ----------------------------------------------------------------------------------------- |
+| x-slack-signature         | Signature of the request payload | Header   | string | `v0=a...3`                                                                                |
+| x-slack-request-timestamp | Timestamp of the request payload | Header   | string | `1531420618`                                                                              |
+| JSON Body                 | Request payload                  | Body     | Object | See [Slack docs](https://api.slack.com/interactivity/slash-commands#app_command_handling) |
+
+**Response**
+
+Sample `200` Response:
+
+```text
+Hello, World!
+```
+
+## ⚙️ Configuration
+
+| Setting           | Value         |
+| ----------------- | ------------- |
+| Runtime           | Node (18.0)   |
+| Entrypoint        | `src/main.js` |
+| Build Commands    | `npm install` |
+| Permissions       | `any`         |
+| Timeout (Seconds) | 15            |
+
+## 🔒 Environment Variables
+
+### SLACK_SIGNING_SECRET
+
+Signing Secret of You Slack App.
+
+| Question      | Answer                                                                             |
+| ------------- | ---------------------------------------------------------------------------------- |
+| Required      | Yes                                                                                |
+| Sample Value  | `b33...156`                                                                        |
+| Documentation | [Slack Docs](https://api.slack.com/interactivity/slash-commands#creating_commands) |

node/slack-command-bot/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "slack-command-bot",
+  "version": "1.0.0",
+  "description": "",
+  "main": "src/main.js",
+  "type": "module",
+  "scripts": {
+    "format": "prettier --write ."
+  },
+  "dependencies": {
+    "crypto": "^1.0.1"
+  },
+  "devDependencies": {
+    "prettier": "^3.0.0"
+  }
+}

node/slack-command-bot/src/main.js

@@ -0,0 +1,19 @@
+import { throwIfMissing,throwIfRequestNotVerified,throwIfReplayAttack } from './utils.js';
+
+export default async ({ req, res, log, error }) => {
+  throwIfMissing(process.env, ['SLACK_SIGNING_SECRET']);
+
+  throwIfMissing(req.headers,["x-slack-request-timestamp",'x-slack-signature'])
+
+  const timestamp = req.headers['x-slack-request-timestamp'];
+  throwIfReplayAttack(timestamp)
+  throwIfRequestNotVerified(
+    timestamp,
+    req.bodyRaw,
+    req.headers['x-slack-signature']
+  )
+
+  log('Valid Request');
+  // The Response Body Will Be The Text message in Slack You Can Send JSON Objects using res.json to display JSON Objects
+  return res.send('Hello World!');
+};