Titan/titanembeds/blueprints/api/api.py

from titanembeds.database import db, Guilds, UnauthenticatedUsers, UnauthenticatedBans, AuthenticatedUsers
from titanembeds.decorators import valid_session_required, discord_users_only
from titanembeds.utils import check_guild_existance, guild_query_unauth_users_bool, get_client_ipaddr, discord_api, rate_limiter, channel_ratelimit_key, guild_ratelimit_key, cache, make_guildchannels_cache_key
from titanembeds.oauth import user_has_permission, generate_avatar_url
from flask import Blueprint, abort, jsonify, session, request
from sqlalchemy import and_
import random
import requests
import json
import datetime
from config import config

api = Blueprint("api", __name__)

def user_unauthenticated():
    if 'unauthenticated' in session:
        return session['unauthenticated']
    return True

def checkUserRevoke(guild_id, user_key=None):
    revoked = True #guilty until proven not revoked
    if user_unauthenticated():
        dbUser = UnauthenticatedUsers.query.filter(and_(UnauthenticatedUsers.guild_id == guild_id, UnauthenticatedUsers.user_key == user_key)).first()
        revoked = dbUser.isRevoked()
    else:
        banned = checkUserBanned(guild_id)
        if banned:
            return revoked
        member = discord_api.get_guild_member(guild_id, session['user_id'])
        if member['code'] == 200:
            revoked = False
    return revoked

def checkUserBanned(guild_id, ip_address=None):
    banned = True
    if user_unauthenticated():
        dbUser = UnauthenticatedBans.query.filter(and_(UnauthenticatedBans.guild_id == guild_id, UnauthenticatedBans.ip_address == ip_address)).all()
        if not dbUser:
            banned = False
        else:
            for usr in dbUser:
                if usr.lifter_id is not None:
                    banned = False
    else:
        banned = False
        bans = discord_api.get_guild_bans(guild_id)['content']
        for user in bans:
            if session['user_id'] == user['user']['id']:
                return True
    return banned

def update_user_status(guild_id, username, user_key=None):
    if user_unauthenticated():
        ip_address = get_client_ipaddr()
        status = {
            'authenticated': False,
            'avatar': None,
            'ip_address': ip_address,
            'username': username,
            'user_key': user_key,
            'guild_id': guild_id,
            'user_id': session['user_id'],
            'banned': checkUserBanned(guild_id, ip_address),
            'revoked': checkUserRevoke(guild_id, user_key),
        }
        if status['banned'] or status['revoked']:
            return status
        dbUser = UnauthenticatedUsers.query.filter(and_(UnauthenticatedUsers.guild_id == guild_id, UnauthenticatedUsers.user_key == user_key)).first()
        dbUser.bumpTimestamp()
        if dbUser.username != username or dbUser.ip_address != ip_address:
            dbUser.username = username
            dbUser.ip_address = ip_address
            db.session.commit()
    else:
        status = {
            'authenticated': True,
            'avatar': session["avatar"],
            'username': username,
            'guild_id': guild_id,
            'user_id': session['user_id'],
            'banned': checkUserBanned(guild_id),
            'revoked': checkUserRevoke(guild_id)
        }
        if status['banned'] or status['revoked']:
            return status
        dbUser = db.session.query(AuthenticatedUsers).filter(and_(AuthenticatedUsers.guild_id == guild_id, AuthenticatedUsers.client_id == status['user_id'])).first()
        dbUser.bumpTimestamp()
    return status

def check_user_in_guild(guild_id):
    if user_unauthenticated():
        return guild_id in session['user_keys']
    else:
        return 200 == discord_api.get_guild_member_nocache(guild_id, session['user_id'])['code']

@cache.cached(timeout=300, key_prefix=make_guildchannels_cache_key)
def get_guild_channels(guild_id):
    if user_unauthenticated():
        roles = [guild_id] #equivilant to @everyone role
    else:
        member = discord_api.get_guild_member(guild_id, session['user_id'])['content']
        roles = member['roles']
    guild_channels = discord_api.get_guild_channels(guild_id)['content']
    guild_owner = discord_api.get_guild(guild_id)['content']['owner_id']
    result_channels = []
    for channel in guild_channels:
        if channel['type'] == 0:
            if guild_owner == session['user_id']:
                result_channels.append(channel)
                continue
            if len(channel['permission_overwrites']) == 0:
                result_channels.append(channel)
            else:
                for overwrite in channel['permission_overwrites']:
                    if overwrite['type'] == "role" and overwrite['id'] == roles[-1] and not user_has_permission(overwrite['deny'], 10):
                        result_channels.append(channel)
                        break
                    elif overwrite['type'] == "member" and not user_unauthenticated and overwrite['id'] == session['user_id'] and not user_has_permission(overwrite['deny'], 10):
                        result_channels.append(channel)
                        break
    return result_channels

def get_online_discord_users(guild_id):
    embed = discord_api.get_widget(guild_id)
    return embed['members']

def get_online_embed_users(guild_id):
    time_past = (datetime.datetime.now() - datetime.timedelta(seconds = 120)).strftime('%Y-%m-%d %H:%M:%S')
    unauths = db.session.query(UnauthenticatedUsers).filter(UnauthenticatedUsers.last_timestamp > time_past, UnauthenticatedUsers.revoked == False).all()
    auths = db.session.query(AuthenticatedUsers).filter(AuthenticatedUsers.last_timestamp > time_past).all()
    users = {'unauthenticated':[], 'authenticated':[]}
    for user in unauths:
        meta = {
            'username': user.username,
            'discriminator': user.discriminator,
        }
        users['unauthenticated'].append(meta)
    for user in auths:
        client_id = user.client_id
        u = discord_api.get_guild_member(guild_id, client_id)['content']['user']
        meta = {
            'id': u['id'],
            'username': u['username'],
            'discriminator': u['discriminator'],
            'avatar_url': generate_avatar_url(u['id'], u['avatar']),
        }
        users['authenticated'].append(meta)
    return users

@api.route("/fetch", methods=["GET"])
@valid_session_required(api=True)
@rate_limiter.limit("2500/hour")
@rate_limiter.limit("12/minute", key_func = channel_ratelimit_key)
def fetch():
    channel_id = request.args.get('channel_id')
    after_snowflake = request.args.get('after', None, type=int)
    if user_unauthenticated():
        key = session['user_keys'][channel_id]
    else:
        key = None
    status = update_user_status(channel_id, session['username'], key)
    if status['banned'] or status['revoked']:
        messages = {}
        status_code = 401
    else:
        messages = discord_api.get_channel_messages(channel_id, after_snowflake)
        status_code = messages['code']
    response = jsonify(messages=messages.get('content', messages), status=status)
    response.status_code = status_code
    return response

@api.route("/post", methods=["POST"])
@valid_session_required(api=True)
@rate_limiter.limit("1200/hour")
@rate_limiter.limit("6/minute", key_func = channel_ratelimit_key)
def post():
    channel_id = request.form.get('channel_id')
    content = request.form.get('content')
    if user_unauthenticated():
        key = session['user_keys'][channel_id]
    else:
        key = None
    status = update_user_status(channel_id, session['username'], key)
    if status['banned'] or status['revoked']:
        message = {}
        status_code = 401
    else:
        message = discord_api.create_message(channel_id, content)
        status_code = message['code']
    response = jsonify(message=message.get('content', message), status=status)
    response.status_code = status_code
    return response

@api.route("/create_unauthenticated_user", methods=["POST"])
@rate_limiter.limit("4/hour", key_func=guild_ratelimit_key)
def create_unauthenticated_user():
    session['unauthenticated'] = True
    username = request.form['username']
    guild_id = request.form['guild_id']
    ip_address = get_client_ipaddr()
    if len(username) < 2 or len(username) > 32:
        abort(406)
    if not check_guild_existance(guild_id):
        abort(404)
    if not guild_query_unauth_users_bool(guild_id):
        abort(401)
    if not checkUserBanned(guild_id, ip_address):
        session['username'] = username
        if 'user_id' not in session:
            session['user_id'] = random.randint(0,9999)
        user = UnauthenticatedUsers(guild_id, username, session['user_id'], ip_address)
        db.session.add(user)
        db.session.commit()
        key = user.user_key
        if 'user_keys' not in session:
            session['user_keys'] = {guild_id: key}
        else:
            session['user_keys'][guild_id] = key
        status = update_user_status(guild_id, username, key)
        return jsonify(status=status)
    else:
        status = {'banned': True}
        response = jsonify(status=status)
        response.status_code = 403
        return response

@api.route("/query_guild", methods=["GET"])
@valid_session_required(api=True)
def query_guild():
    guild_id = request.args.get('guild_id')
    if check_guild_existance(guild_id):
        if check_user_in_guild(guild_id):
            channels = get_guild_channels(guild_id)
            discordmembers = get_online_discord_users(guild_id)
            embedmembers = get_online_embed_users(guild_id)
            return jsonify(channels=channels, discordmembers=discordmembers, embedmembers=embedmembers)
        abort(403)
    abort(404)

@api.route("/create_authenticated_user", methods=["POST"])
@discord_users_only(api=True)
def create_authenticated_user():
    guild_id = request.form.get('guild_id')
    if session['unauthenticated']:
        response = jsonify(error=True)
        response.status_code = 401
        return response
    else:
        if not check_guild_existance(guild_id):
            abort(404)
        if not checkUserBanned(guild_id):
            db_user = db.session.query(AuthenticatedUsers).filter(and_(AuthenticatedUsers.guild_id == guild_id, AuthenticatedUsers.client_id == session['user_id'])).first()
            if not db_user:
                db_user = AuthenticatedUsers(guild_id, session['user_id'])
                db.session.add(db_user)
                db.session.commit()
            if not check_user_in_guild(guild_id):
                discord_api.add_guild_member(guild_id, session['user_id'], session['user_keys']['access_token'])
            status = update_user_status(guild_id, session['username'])
            return jsonify(status=status)
        else:
            status = {'banned': True}
            response = jsonify(status=status)
            response.status_code = 403
            return response