Line Chat Bot: Zero to Hero

Overview

A comprehensive guide to building a Line Chat Bot from scratch, integrating various tools, databases, and analytics platforms, and deploying the bot to production.

---

Table of Contents

1. Line Developer 101
2. Rich Menu and Line Message Types
3. Storing Chat Data with MongoDB
4. Web Development 101
5. Line LIFF and Continuations
6. Dialogflow 101
7. Dialogflow with Generative AI
8. Deploying to Production

---

1. Line Developer 101

• Introduction to Line Messaging API, Events, and SDK
• Creating a Line Official Account (OA) and Generating Tokens
• Installing Required Libraries and Tools
• Building a Webhook with FastAPI
• Connecting Line OA to the Webhook

2. Rich Menu and Line Message Types

• Creating a Rich Menu
• Overview of Different Message Types
• Sending Various Message Types with Python
• Implementing Quick Reply

3. Storing Chat Data with MongoDB

• Introduction to MongoDB
• Setting up a Database on MongoDB
• Getting Started with pymongo
• Storing Message Events from the Line Bot in MongoDB

4. Web Development 101

• Understanding Basic Web Development Concepts
• Creating a Web Frontend with HTML and Tailwind CSS
• Building a Backend API with FastAPI
• Routing the Webhook, API, and Frontend Together

5. Line LIFF and Continuations

• Connecting the Frontend with Line LIFF
• Storing Data in MongoDB
• Basic Analytics with Power BI Desktop
• Querying Data for Broadcasts

6. Dialogflow 101

• Setting up Dialogflow
• Creating Basic Intents
• Connecting Python to Dialogflow

7. Dialogflow with Generative AI

• Creating Intents Connected to Gemini
• Setting up Document AI
• Creating Intents Linked to Document AI

8. Deploying to Production

• Introduction to Docker
• Creating a Docker Image
• Deploying Docker with Cloud Run

---

Prerequisites

• MongoDB
• Python 3.13
• Line Developer Account
• Ngrok
• Postman
• GCP Account
• MongoDB Atlas
• GCP Account
• Docker
• Power BI Desktop

Installation

Clone the Repository

1. Clone the repository:

   git clone https://github.com/falukelo/linedev-zero2hero.git

2. Navigate to the project directory:

   cd line-chat-bot-zero-to-hero

Install required dependencies

pip install -r requirements.txt

Installing ngrok

ngrok is essential for creating a secure tunnel to test the webhook locally with Line's platform.

Windows

1. Go to the ngrok download page.
2. Download the Windows version.
3. Extract the downloaded file and move ngrok.exe to a preferred location, such as C:\ngrok.
4. Add ngrok to your PATH:
   • Open the Command Prompt as an administrator.
   • Run the following command to add ngrok to the PATH:

     setx PATH "%PATH%;C:\ngrok"

5. Verify the installation by running:

   ngrok --version

macOS

1. Open your terminal.
2. Install ngrok using Homebrew (if Homebrew is not installed, follow the instructions here):

   brew install ngrok/ngrok/ngrok

3. Verify the installation:

   ngrok --version

Add your Ngrok authentication token

Run the following command to add your authtoken to the default ngrok.yml:

ngrok config add-authtoken <Your_Ngrok_token>