pnut-matrix/pnut-matrix.py

import websocket
import threading
import time
import logging
import yaml
import json
import pnutpy
import requests
import magic

from matrix_client.api import MatrixHttpApi
from matrix_client.api import MatrixError, MatrixRequestError
from models import Avatars, Rooms, Events
from database import db_session, init_db
from sqlalchemy import and_
from appservice import app

logger = logging.getLogger()

_shutdown = threading.Event()
_reconnect = threading.Event()

def new_message(msg):
    logger.debug("channel: " + msg.channel_id)
    logger.debug("username: " + msg.user.username)
    if 'name' in msg.user:
        logger.debug("name: " + msg.user.name)
    logger.debug("text: " + msg.content.text)

    # ignore messages posted by the bridge
    if msg.user.username == config['MATRIX_PNUT_USER']:
        return

    if msg.source.id == config['PNUTCLIENT_ID']:
        return

    room = Rooms.query.filter(Rooms.pnut_chan == msg.channel_id).one_or_none()
    logger.debug(room)
    if room is None:
        logger.debug('-not_mapped-')
        return

    matrix_id = matrix_id_from_pnut(msg.user.username)
    matrix_api = MatrixHttpApi(config['MATRIX_HOST'], 
        token=config['MATRIX_AS_TOKEN'],
        identity=matrix_id)

    profile = get_matrix_profile(matrix_id)
    if not profile:
        new_matrix_user(msg.user.username)
        logger.debug('-new_user-')
        profile = {'displayname': None}
    
    if profile['displayname'] != matrix_display_from_pnut(msg.user):
        set_matrix_display(msg.user)
        logger.debug('-set_display-')
    
    avatar = Avatars.query.filter(Avatars.pnut_user == msg.user.username).one_or_none()
    if avatar is None or avatar.avatar != msg.user.content.avatar_image.link:
        set_matrix_avatar(msg.user)
        logger.debug('-set_avatar-')

    # members = matrix_api.get_room_members(room.room_id)
    # logger.debug(members)
    # join_room(room.room_id, config['MATRIX_AS_ID'])
    # TODO: sort out room invite and join logic
    join_room(room.room_id, matrix_id)

    if 'content' in msg:
        text = msg.content.text + "\n"
        ts = int(msg.created_at.strftime('%s')) * 1000

        lnktext = ""
        for link in msg.content.entities.links:
            if 'title' in link:
                lnktext += link.title + "\n"
            if 'link' in link:
                lnktext += link.link + "\n"

        if len(lnktext) > 0:
            text += "\n" + lnktext

        r = matrix_api.send_message(room.room_id, text, timestamp=ts)
        event = Events(
            event_id=r['event_id'], 
            room_id=room.room_id, 
            pnut_msg_id=msg.id, 
            pnut_user_id=msg.user.id, 
            pnut_chan_id=msg.channel_id,
            deleted=False)
        db_session.add(event)
        db_session.commit()

        if len(msg.raw) > 0:
            logger.debug('-handle media uploads-')
            new_media(room.room_id, msg)

def new_media(room_id, msg):
    matrix_id = matrix_id_from_pnut(msg.user.username)
    matrix_api = MatrixHttpApi(config['MATRIX_HOST'], 
        token=config['MATRIX_AS_TOKEN'],
        identity=matrix_id)
    ts = int(msg.created_at.strftime('%s')) * 1000

    for item in msg.raw:
        if item.type == 'io.pnut.core.oembed' and 'url' in item.value:

            dl = requests.get(item.value.url, stream=True)
            dl.raise_for_status()
            with magic.Magic(flags=magic.MAGIC_MIME_TYPE) as m:
                mtype = m.id_buffer(dl.content)
            info = {'mimetype': mtype}

            ul = matrix_api.media_upload(dl.content, mtype)

            if item.value.type == 'photo':
                msgtype = 'm.image'
                info['h'] = item.value.height
                info['w'] = item.value.width
                info['size'] = len(dl.content)
            elif item.value.type == 'video' or item.value.type == 'html5video':
                msgtype = 'm.video'
                info['h'] = item.value.height
                info['w'] = item.value.width
                info['size'] = len(dl.content)
            elif item.value.type == 'audio':
                msgtype = 'm.audio'
                info['duration'] = int(item.value.duration) * 1000
                info['size'] = len(dl.content)
            else:
                msgtype = 'm.file'
                info['size'] = len(dl.content)

            r = matrix_api.send_content(room_id, ul['content_uri'], item.value.title, msgtype, extra_information=info, timestamp=ts)
            event = Events(
                event_id=r['event_id'], 
                room_id=room_id, 
                pnut_msg_id=msg.id, 
                pnut_user_id=msg.user.id, 
                pnut_chan_id=msg.channel_id,
                deleted=False)
            db_session.add(event)
            db_session.commit()

def delete_message(msg):
    matrix_id = matrix_id_from_pnut(msg.user.username)
    matrix_api = MatrixHttpApi(config['MATRIX_HOST'], 
        token=config['MATRIX_AS_TOKEN'],
        identity=matrix_id)

    events = Events.query.filter(and_(Events.pnut_msg_id == msg.id, Events.deleted == False)).all()
    for event in events:
        matrix_api.redact_event(event.room_id, event.event_id)
        event.deleted = True
        db_session.commit()

def matrix_id_from_pnut(username):
    return "@" + config['MATRIX_PNUT_PREFIX'] + username + ":" + config['MATRIX_DOMAIN']

def matrix_display_from_pnut(user):
    if 'name' in user:
        display = user.name + " <@" + user.username + "> (pnut)"
    else:
        display = "@" + user.username
    return display
    # return user.username + " (pnut)"

def get_matrix_profile(matrix_id):
    url = matrix_url + '/profile/' + matrix_id
    r = requests.get(url)

    if r.status_code == 200:
        return r.json()
    else:
        return None

def set_matrix_display(user):
    matrix_id = matrix_id_from_pnut(user.username)
    matrix_api = MatrixHttpApi(config['MATRIX_HOST'], 
        token=config['MATRIX_AS_TOKEN'],
        identity=matrix_id)
    matrix_api.set_display_name(matrix_id, matrix_display_from_pnut(user))

def set_matrix_avatar(user):
    matrix_id = matrix_id_from_pnut(user.username)
    matrix_api = MatrixHttpApi(config['MATRIX_HOST'], 
        token=config['MATRIX_AS_TOKEN'],
        identity=matrix_id)

    dl = requests.get(user.content.avatar_image.link, stream=True)
    dl.raise_for_status()
    with magic.Magic(flags=magic.MAGIC_MIME_TYPE) as m:
        mtype = m.id_buffer(dl.content)
    ul = matrix_api.media_upload(dl.content, mtype)

    try:
        matrix_api.set_avatar_url(matrix_id, ul['content_uri'])
        avatar = Avatars.query.filter(Avatars.pnut_user == user.username).one_or_none()
        if avatar is None:
            avatar = Avatars(pnut_user=user.username, avatar=user.content.avatar_image.link)
            db_session.add(avatar)
        else:
            avatar.avatar = user.content.avatar_image.link
        db_session.commit()

    except MatrixRequestError:
        logger.exception('failed to set user avatar')

def new_matrix_user(username):
    matrix_api = MatrixHttpApi(config['MATRIX_HOST'], 
        token=config['MATRIX_AS_TOKEN'])
    data = {
        'type': 'm.login.application_service',
        'user': config['MATRIX_PNUT_PREFIX'] + username
    }
    matrix_api.register(content=data)

def join_room(room_id, matrix_id):
    matrix_api_as = MatrixHttpApi(config['MATRIX_HOST'], 
        token=config['MATRIX_AS_TOKEN'])
    matrix_api = MatrixHttpApi(config['MATRIX_HOST'], 
        token=config['MATRIX_AS_TOKEN'],
        identity=matrix_id)
    
    try:
        matrix_api.join_room(room_id)
    
    except MatrixRequestError as e:
        if e.code == 403:
            matrix_api_as.invite_user(room_id, matrix_id)
            matrix_api.join_room(room_id)
        else:
            logger.exception('failed to join room')

    logger.debug('-room_join-')

def on_message(ws, message):
    # logger.debug("on_message: " + message)
    msg = json.loads(message)
    logger.debug(msg['meta'])
    
    if 'data' in msg:

        if msg['meta']['type'] == "message":

            # TODO: bypassed other channel types for now
            if msg['meta']['channel_type'] != 'io.pnut.core.chat':
                return

            pmsg = pnutpy.models.Message.from_response_data(msg['data'])

            if 'is_deleted' in msg['meta']:
                if msg['meta']['is_deleted']:
                    logger.debug("message: delete")
                    delete_message(pmsg)
                else:
                    logger.debug("uh whut?")
            else:
                new_message(pmsg)

def on_error(ws, error):
    logger.error("on_error: !!! ERROR !!!")
    logger.error(error)

def on_close(ws):
    logger.debug("on_close: ### CLOSED ###")

def on_open(ws):

    def run(*args):
        while not _shutdown.isSet() and not _reconnect.isSet():
            time.sleep(3)
            try:
                ws.send(".")
            except websocket._exceptions.WebSocketConnectionClosedException:
                logger.debug('websocket closed exception caught...')
                _reconnect.set()

        time.sleep(1)
        logger.debug("*** terminate thread ***")

    t = threading.Thread(target=run)
    t.start()

def wsthreader(threadfunc):

    def wrapper():

        while not _shutdown.isSet():
            _reconnect.clear()
            logger.debug('threadfunc start...')
            running = threadfunc()
            logger.debug('threadfunc end...')
            if running:
                time.sleep(5)
            else:
                _shutdown.set()
        logger.debug('*** thread stopped ***')

    return wrapper

if __name__ == '__main__':
    # websocket.enableTrace(True)
    logging.basicConfig(level=logging.DEBUG)

    with open("config.yaml", "rb") as config_file:
        config = yaml.load(config_file)
    
    ws_url = 'wss://stream.pnut.io/v0/app?access_token='
    ws_url += config['PNUT_APPTOKEN'] + '&key=' + config['PNUT_APPKEY']
    ws_url += '&include_raw=1'
    matrix_url = config['MATRIX_HOST'] + '/_matrix/client/r0'

    # setup the database connection
    init_db()

    # setup the websocket connection
    ws = websocket.WebSocketApp(ws_url, on_message=on_message, 
        on_error=on_error, on_close=on_close)
    ws.on_open = on_open
    wst = threading.Thread(target=wsthreader(ws.run_forever))
    wst.start()

    # setup the matrix app service
    if config['MATRIX_ADMIN_ROOM']:
        logger.debug("- sould join admin room -")
        join_room(config['MATRIX_ADMIN_ROOM'], config['MATRIX_AS_ID'])
    app.config.update(config)
    app.run(port=config['LISTEN_PORT'])

    logger.info('!! shutdown initiated !!')
    _shutdown.set()
    ws.close()
    time.sleep(2)