import json

from flask import Flask, jsonify, request

app = Flask(__name__)
with open("data.json") as f:
    data = json.load(f)

@app.route('/all/')
def get_all():
    return jsonify(data)


@app.route('/data/<data_id>', methods=["POST"])
def set_data_point(data_id):
    try:
        value = request.json["value"]
    except KeyError:
        return jsonify({"success": False}), 400

    data[data_id] = value
    with open("data.json", "w") as f:
        json.dump(data, f)
    return jsonify({"success": True})