Make a sane HTTP API for Vestaboard

main.py

import os
import vestaboard
import json
import threading

from dotenv import load_dotenv
from flask import Flask, request

load_dotenv()

API_KEY = os.environ["VESTABOARD_API_KEY"]
API_SECRET = os.environ["VESTABOARD_API_SECRET"]
RW_API_KEY = os.environ["VESTABOARD_READ_WRITE_KEY"]
SUB_ID = os.environ["VESTABOARD_SUB_ID"]
LOCAL_API_KEY = os.environ["VESTABOARD_LOCAL_API_KEY"]
LOCAL_IP_ADDRESS = os.environ["VESTABOARD_LOCAL_IP_ADDRESS"]

api = Flask(__name__)

board = vestaboard.Board(
    apiKey=API_KEY, 
    apiSecret=API_SECRET, 
    subscriptionId=SUB_ID)

readBoard = vestaboard.Board(
    apiKey=RW_API_KEY, 
    apiSecret=API_SECRET, 
    readWrite=True,
    subscriptionId=SUB_ID)
#    localApi={ "key": LOCAL_API_KEY, "ip": LOCAL_IP_ADDRESS })

pending_board = None

@api.route("/", methods=["GET"])
def hello():
    return "Hello world\n" + json.dumps(readBoard.read())

@api.route("/text", methods=["POST"])
def text():
    global pending_board

    print(request.json)
    if (pending_board is not None):
        return "busy"

    board.post(request.json["text"])
    return "ok"

def repost_pending():
    global pending_board

    pb = pending_board
    pending_board = None
    if (pb is not None):
        print(f"Reposting {json.dumps(pb)}")
        board.raw(pb)

@api.route("/notify", methods=["POST"])
def notify():
    global pending_board

    delay_sec = 45
    if 'delay' in request.json:
        delay_sec = int(request.json["delay"])

    if 'text' not in request.json:
        return "no text"

    pending_board = json.loads(readBoard.read()["currentMessage"]["layout"])
    print(f"Pending {json.dumps(pending_board)}")
    print(f"Posting {request.json['text']} for {delay_sec} seconds")
    board.post(request.json["text"])

    timer = threading.Timer(delay_sec, repost_pending)
    timer.start()

    return "ok"

@api.route("/raw", methods=["POST"])
def raw():
    if (pending_board is not None):
        return "busy"

    board.raw(request.json.raw)
    return "ok"

if __name__ == "__main__":
    print("Vestaboard Server now running on port 6563")
    api.run(host="0.0.0.0", port=6563)