📢 LINE Notify Bot - Monthly Spotify Reminder

This project is a simple LINE Messaging API bot using Google Apps Script (GAS) to send a monthly group reminder with a QR payment image and a mention to all group members.

📅 Sends a message on the 1st of every month.

💡 Features

• Sends custom text message
• Includes an image (e.g., QR code)
• Automatically runs every month using Google Apps Script Trigger

📦 Requirements

• LINE Messaging API (with your channel access token and group ID)
• Google Apps Script
• Internet access

🛠️ Setup Instructions

1. Create a LINE Bot

• Go to LINE Developers Console
• Create a new provider and messaging API channel
• Enable Messaging API
• Get your Channel Access Token
• Add your bot to a LINE group and send at least one message to retrieve the groupId

2. Google Apps Script Setup

1. Go to Google Apps Script
2. Create a new project
3. Paste this code in Code.gs:

function sendLineNotification() {
  const accessToken = 'YOUR_ACCESS_TOKEN'; // Replace this
  const groupId = 'YOUR_GROUP_ID'; // Replace this

  const messages = [
    {
      type: 'text',
      text: '@All จ่ายเงินค่า Spotify ด้วยนะะ 36.5 บาท truemoney-xxxxxxxx',
      mention: {
        mentionees: [{
          index: 0,
          length: 4,
          type: 'all'
        }]
      }
    },
    {
      type: 'image',
      originalContentUrl: 'https://YOUR-IMAGE-ADDRESSES.png',
      previewImageUrl: 'https://YOUR-IMAGE-ADDRESSES.png'
    }
  ];

  const payload = {
    to: groupId,
    messages: messages
  };

  const options = {
    method: 'post',
    contentType: 'application/json',
    headers: {
      Authorization: 'Bearer ' + accessToken
    },
    payload: JSON.stringify(payload)
  };

  UrlFetchApp.fetch('https://api.line.me/v2/bot/message/push', options);
}

3. Add Scheduler (Trigger)

1. Click the clock icon ⏰ in Apps Script to open "Triggers"
2. Click + Add Trigger
3. Choose the following:

Option	Value
Function to run	sendLineNotification
Deployment	Head
Event source	Time-driven
Type of time-based trigger	Month timer
Day of month	1st
Time of day	Your choice (e.g., 9AM)

🖼️ Demo Output

📷 QR Payment image and message:

@All จ่ายเงินค่า Spotify ด้วยนะะ 36.5 บาท truemoney-xxxxxxxx

🖼️ Preview

🔐 Security Notes

• Do not expose your access token in public repositories. Use Script Properties for secrets.
• This project is for educational and personal use only.

📄 License

MIT License