技術書典のかんたん後払いシステム集計スクリプト

00memo.js

// https://techbookfest.org/market/distributor/watch
// をChromeで開いて、開発者コンソールを開き、
ws = new WebSocket("wss://s-usc1c-nss-223.firebaseio.com/.ws?v=5&ns=tbf-tokyo")
x = ""
ws.addEventListener('message', e=>{x+=e.data+"\n"})
ws.send('{"t":"d","d":{"r":1,"a":"s","b":{"c":{"sdk.js.6-6-0":1}}}}')
// 開発者コンソールのNetwork → WS → Messagesからコピー
ws.send('{"t":"d","d":{"r":2,"a":"auth","b":{"cred":"????"}}}')
// 同じくコピー
ws.send('{"t":"d","d":{"r":3,"a":"q","b":{"p":"/market/handshake/distributor/????","h":""}}}')
x
// これをコピー
// 複数のJSONが含まれていて、長いJSONは分割されているので、良い感じに成形してtbf.jsonに保存
// parse.pyを実行

parse.py

import json
count = {}
price = {}
d = open("tbf.json", encoding="utf-8").read()
d = json.loads(d)["d"]["b"]["d"]
for k in d.keys():
  for i in d[k]["items"]:
    name = d[k]["items"][i]["product"]["name"]
    num = d[k]["items"][i]["quantity"]
    if name not in count:
      count[name] = 0
      price[name] = d[k]["items"][i]["product"]["price"]
    count[name] += num
for name in count:
  print("%s %s*%s = %s" % (name, price[name], count[name], price[name]*count[name]))