dify-firebase-functions-slack-bolt-sample

dify-firebase-functions-slack-bolt-sample is a beginner-friendly guide to using Dify, an open-source large language model (LLM) application development platform. This sample project demonstrates how to integrate Dify with a Slack Bolt app deployed on Firebase Functions.

• Requirements
• Setup
• Usage
• Making Changes
• License

Requirements

Before you start, make sure you have these installed:

• Node.js version 22 or later
• npm
• Firebase CLI
• ngrok

For Firebase CLI installation, see the Firebase - Firebase CLI reference.

Check your installations by running:

$ node --version # the below version is on my environment
v22.4.1
$ npm --version # the below version is on my environment
10.7.0
$ firebase --version # the below version is on my environment
13.13.0
$ ngrok --version # the below version is on my environment
ngrok version 3.3.0

Important: Ensure all subsequent commands are executed within the functions directory. To navigate to this directory, use the command cd functions and verify your current working directory if necessary.

Setup

Install Project Dependencies: Open your terminal, navigate to this project's functions folder, and run:

$ npm install

Usage

Setup Your Firebase Project

Before deploying your application, complete the following preparatory steps:

1. Create a Firebase project:

Navigate to the Firebase Console. Click on Create a project and follow the prompts to create a new Firebase project.

2. Switch to the Blaze plan:

Firebase Functions require the Blaze (Pay as you go) plan for deployment. In the Firebase Console, select your project, then navigate to the left side bar section to change your plan.

3. Configure your Firebase project locally:

Update the .firebaserc file in your project's root directory to include your Firebase project name:

{
  "projects": {
    "default": "your_project_name"
  }
}

Setup Your Slack App

1. Navigate to Slack - Your Apps and click Create New App.
2. Choose From an app manifest option, select a workspace under Pick a workspace to develop your app, and then click Next.
3. In the app manifest JSON below, replace [your_app_name] with your app's name, paste the updated JSON, then proceed by clicking Next and Create.

{
  "display_information": {
    "name": "[your_app_name]"
  },
  "features": {
    "bot_user": {
      "display_name": "[your_app_name]",
      "always_online": true
    }
  },
  "oauth_config": {
    "scopes": {
      "bot": [
        "app_mentions:read",
        "channels:history",
        "chat:write",
        "files:read"
      ]
    }
  },
  "settings": {
    "event_subscriptions": {
      "request_url": "http://dummy/events", // NOTE: replace this later
      "bot_events": ["app_mention"]
    },
    "org_deploy_enabled": false,
    "socket_mode_enabled": false,
    "token_rotation_enabled": false
  }
}

4. Navigate to Settings and select Install App, then click Install to Workspace and Allow button.
5. Your Bot User OAuth Token will appear. This is your SLACK_BOT_TOKEN for later use.
6. Find your Signing Secret under Basic Information. This is your SLACK_SIGNING_SECRET for later use.
7. To add your bot to a Slack channel, use the command:

/invite @[your_app_name]

Local Emulator

To facilitate local development and testing of Firebase Functions, use the Firebase Emulator Suite. Follow these steps to run your functions locally:

To run Firebase Functions locally using the emulator, set your secret values in functions/.secret.local:

$ cp -p ./.secret.local.example ./secret.local
$ vim ./secret.local # replace the secrets with your own values
DIFY_API_KEY=your_api_key
SLACK_BOT_TOKEN=your_bot_token
SLACK_SIGNING_SECRET=your_signing_secret

To launch the emulator, execute:

$ npm run emulator
✔  functions[us-central1-slack]: http function initialized (http://127.0.0.1:5001/[your_project_name]/us-central1/slack).

To make your local emulator accessible online, use ngrok to forward port 5001:

$ ngrok http 5001
Forwarding https://[your_ngrok_id].ngrok-free.app -> http://localhost:5001

This command provides a public URL. Replace [your_ngrok_id] in the URL https://[your_ngrok_id].ngrok-free.app with the ID provided by ngrok.

To configure Slack event subscriptions:

1. Go to the Event Subscriptions page on your Slack app's dashboard.
2. In the Request URL field, enter https://[your_ngrok_id].ngrok-free.app/[your_project_name]/us-central1/slack/events.
3. Wait for the Request URL Verified confirmation, then click the Save changes button.

To test in a Slack channel, mention your bot using @[your_app_name] followed by a greeting message, like so:

@[your_app_name] hello

Deploy

To authenticate with Firebase and access your projects, use the Firebase CLI login command:

$ firebase login

To keep your secret keys safe when using Firebase Functions, store then as secret values in Google Cloud Secret Manger:

$ firebase functions:secrets:set DIFY_API_KEY
? Enter a value for DIFY_API_KEY [input is hidden]
$ firebase functions:secrets:set SLACK_BOT_TOKEN
? Enter a value for SLACK_BOT_TOKEN [input is hidden]
$ firebase functions:secrets:set SLACK_SIGNING_SECRET
? Enter a value for SLACK_SIGNING_SECRET [input is hidden]

To confirm your secret keys are correctly stored as secrets, use the following command:

$ firebase functions:secrets:access DIFY_API_KEY
your_api_key
$ firebase functions:secrets:access SLACK_BOT_TOKEN
your_bot_token
$ firebase functions:secrets:access SLACK_SIGNING_SECRET
your_signing_secret

After securing your secret keys, you're ready to deploy your application to Firebase Functions:

$ npm run deploy

To monitor the behavior and troubleshoot your deployed functions, view the logs:

$ npm run logs

The final step involves linking your deployed function to the Slack app for integration.

To configure Slack event subscriptions:

1. Go to the Event Subscriptions page on your Slack app's dashboard.
2. In the Request URL field, enter https://slack-[your_function_id]-uc.a.run.app/events.
3. Wait for the Request URL Verified confirmation, then click the Save changes button.

NOTE: Replace [your_function_id] with your Firebase project value, found in the Firebase Console under the Functions Dashboard.

To test in a Slack channel, mention your bot using @[your_app_name] followed by a greeting message, like so:

@[your_app_name] hello

Making Changes

Building the Project

After making changes, you might need to build the project to see your changes in action:

$ npm run build

Formatting and Linting

To ensure your code follows the project's coding standards, run the formatting and linting tools:

$ npm run typecheck # type check without modifying files
$ npm run check     # scan without modifying files
$ npm run fix       # modify files

License

MIT