設計一個chatbot將使用者拆分為 1. 學習咖啡知識者 2. 消費者 若為學習咖啡者，可透過輸入特定關鍵字，來學習咖啡豆、咖啡相關器材等知識 若為消費者，可根據菜單上有什麼品項並輸入後，作為點餐的方式

In every states if the bot doesn't know the input message, it will reply 請重新輸入

The initial state is set to beginner.

The state of being a coffee player. You can input some keywords here, for example

* Input : "咖啡豆"
		* Reply : "分為兩種，羅布斯塔與阿拉比卡"

* Input : "手沖工具"
		* Reply : "手沖壺、濾紙、濾杯、磨豆機"		

The state of being a coffee master. You are already have enough knowledge.

The state of begin a customer in coffe shop. You can input some keywords here, for example

* Input : "美式"
		* Reply : '美式為100元'
* Input : "拿鐵"
		* Reply : '拿鐵為120元'

The state of being a space state.

A Line bot based on a finite state machine

More details in the Slides and FAQ

• Python 3.6
• Pipenv
• Facebook Page and App
• HTTPS Server

pip3 install pipenv

pipenv --three

pipenv install

pipenv shell

• pygraphviz (For visualizing Finite State Machine)
  • Setup pygraphviz on Ubuntu
  • Note: macOS Install error

You should generate a .env file to set Environment Variables refer to our .env.sample. LINE_CHANNEL_SECRET and LINE_CHANNEL_ACCESS_TOKEN MUST be set to proper values. Otherwise, you might not be able to run your code.

You can either setup https server or using ngrok as a proxy.

• macOS, Windows, Linux

or you can use Homebrew (MAC)

brew cask install ngrok

ngrok would be used in the following instruction

ngrok http 8000

After that, ngrok would generate a https URL.

python3 app.py

Or You can use servo to expose local servers to the internet.

Setting to deploy webhooks on Heroku.

• macOS, Windows

or you can use Homebrew (MAC)

brew tap heroku/brew && brew install heroku

or you can use Snap (Ubuntu 16+)

sudo snap install --classic heroku

1. Register Heroku: https://signup.heroku.com

2. Create Heroku project from website

3. CLI Login

   heroku login

1. Add local project to Heroku project

   heroku git:remote -a {HEROKU_APP_NAME}

2. Upload project

   git add .
   git commit -m "Add code"
   git push -f heroku master
   

3. Set Environment - Line Messaging API Secret Keys

   heroku config:set LINE_CHANNEL_SECRET=your_line_channel_secret
   heroku config:set LINE_CHANNEL_ACCESS_TOKEN=your_line_channel_access_token
   

4. Your Project is now running on Heroku!

   url: {HEROKU_APP_NAME}.herokuapp.com/callback

   debug command: heroku logs --tail --app {HEROKU_APP_NAME}

5. If fail with pygraphviz install errors

   run commands below can solve the problems

   heroku buildpacks:set heroku/python
   heroku buildpacks:add --index 1 heroku-community/apt
   

   refference: https://hackmd.io/@ccw/B1Xw7E8kN?type=view#Q2-如何在-Heroku-使用-pygraphviz

Pipenv ❤️ @chihsuan

TOC-Project-2019 ❤️ @winonecheng

Flask Architecture ❤️ @Sirius207

Line line-bot-sdk-python