Remove copy of briar-cli-python-demo

src/briar/api/briar.py

-# Copyright (c) 2019 Torsten Grote
-# SPDX-License-Identifier: AGPL-3.0-only
-# License-Filename: LICENSE.md
-#
-# Originally coming from
-# https://code.briarproject.org/grote/briar-cli-python-demo/blob/master/briar-cli.py
-
-import asyncio
-import json
-import sys
-import threading
-from datetime import datetime
-
-import requests
-import websockets
-
-HOST = 'localhost:7000'
-CONTACT_ID = '1'
-
-URL = 'http://%s/v1/messages/%s' % (HOST, CONTACT_ID)
-URL_WS = 'ws://%s/v1/ws' % HOST
-
-PROMPT = '$> '
-
-
-def main():
-    if len(sys.argv) != 2:
-        print("Please provide auth token: %s <token>" % sys.argv[0])
-        sys.exit(1)
-
-    auth_token = sys.argv[1]
-    load_history(auth_token)
-    threading.Thread(target=get_message_stdin, args=[auth_token]).start()
-
-    loop = asyncio.get_event_loop()
-    loop.create_task(connect_websocket(auth_token))
-    loop.run_forever()
-    loop.close()
-
-
-async def connect_websocket(token):
-    async with websockets.connect(URL_WS) as ws:
-        await ws.send(token)
-        await get_message_websocket(ws)
-
-
-async def get_message_websocket(ws):
-    while not ws.closed and not asyncio.get_event_loop().is_closed():
-        message = await ws.recv()
-        m = json.loads(message)
-        if m['name'] == 'ConversationMessageReceivedEvent':
-            print()  # line-break
-            print_message(m['data'])
-            print(PROMPT, end='', flush=True)
-    if not asyncio.get_event_loop().is_closed():
-        asyncio.get_event_loop().create_task(get_message_websocket(ws))
-
-
-def get_message_stdin(token):
-    while True:
-        body = input(PROMPT)
-        if len(body) > 0:
-            res = requests.post(URL, headers=get_auth_header(token), json={'text': body})
-            if res.status_code == 200:
-                print_message(res.json())
-            else:
-                print("Error: %d" % res.status_code)
-
-
-def print_message(message):
-    prefix = '>' if message['local'] else '<'
-    time = get_timestamp(datetime.fromtimestamp(message['timestamp'] / 1000))
-    print(f"{time} {prefix} {message['text']}")
-
-
-def get_timestamp(date):
-    return date.strftime('%Y-%m-%dT%H:%M:%S')
-
-
-def load_history(token):
-    history = requests.get(URL, headers=get_auth_header(token)).json()
-    for message in history:
-        print_message(message)
-
-
-def get_auth_header(token):
-    return {'Authorization': 'Bearer %s' % token}
-
-
-if __name__ == "__main__":
-    main()
-