Reformat Telegram @ShowUpdateJsonBot Message update json to markdown

tg_md.py

def join(op): return lambda *args: "".join(op(*args))
@join # [d]: sometime Tg make offset/length increase by 1
def applySpans(dmsg, op, d, kP="offset", kN="length"):
  s = dmsg["text"]; i0 = 0
  span = lambda e: (e[kP]+d, e[kP]+d+e[kN], e)
  for (iBeg, iStop, e) in map(span, dmsg["entities"]):
    yield s[i0:iBeg]; yield op(e["type"], e.get("url"), s[iBeg:iStop])
    i0 = iStop
  yield s[i0:]
def transTable(deft="{0}", **d): return lambda tag, data, text: (d.get(tag) or deft).format(text, data)

_mdify = transTable(text_link="[{0}]({1})", pre="```\n{0}\n```\n", code="`{0}`", bold="__{0}__", italic="_{0}_", underline="<u>{0}</u>", strikethrough="~~{0}~~")
def mdify(tag,s1,s): print(tag,s1,s); return _mdify(tag,s1,s) if tag != "code" else _mdify("pre" if "\n" in s else tag,s1,s)

from re import compile as Regex
from json import loads; from sys import stdin; from os import getenv
RE_WHITE = Regex(r"\nJSON Dump Bot:|(, \[[\d.]{8} \d{2}:\d{2}\]\n\[In reply to [^]]+\])")
def readJson(): s=stdin.read(); return loads(RE_WHITE.sub("", s[s.index('{'):]))

if __name__ == "__main__": # KNOWN BUG: text_link offset sometimes wrong (workaround-ed)
  d = readJson(); pfix = int(getenv("posfix", "0"))
  sep = lambda: print("----")
  sep(); print(d["text"])
  sep(); md = applySpans(d, mdify, pfix) # side-effect msgs
  sep(); print(md)