fisk/core/views/hooks.py

import re
from string import digits

import orjson
from django.contrib.auth.mixins import LoginRequiredMixin
from django.http import HttpResponse, HttpResponseBadRequest
from pydantic import ValidationError
from rest_framework.parsers import JSONParser
from rest_framework.views import APIView

from core.forms import HookForm
from core.lib.schemas.drakdoo_s import DrakdooCallback
from core.models import Callback, Hook, Signal
from core.trading import market
from core.util import logs
from core.views import ObjectCreate, ObjectDelete, ObjectList, ObjectUpdate

log = logs.get_logger(__name__)


def extract_price(message):
    result = re.findall("\d+\.\d+", message)  # noqa
    if len(result) != 1:
        log.error(f"Could not extract price from message: {message}")
        return False
    try:
        log.debug(f"Extracted {result[0]} from '{message}'")
        return float(result[0])
    except ValueError:
        return False


class HookAPI(APIView):
    parser_classes = [JSONParser]

    def post(self, request, hook_name):
        log.debug(f"HookAPI POST: {request.data}")

        # Try loading the JSON
        # try:
        #     loaded_json = orjson.loads(request.data)
        # except orjson.JSONDecodeError:
        #     return HttpResponseBadRequest("Invalid JSON")

        # Try validating the JSON
        try:
            hook_resp = DrakdooCallback(**request.data)
        except ValidationError as e:
            log.error(f"HookAPI POST: {e}")
            return HttpResponseBadRequest(e)

        if hasattr(hook_resp, "market.price"):
            try:
                price = float(hook_resp.market.price)
            except ValueError:
                log.debug(
                    f"Could not extract price from message: {hook_resp.market.price}"
                )
                return HttpResponseBadRequest("Could not extract price from message")
        else:
            price = extract_price(hook_resp.message)
            if not price:
                log.debug(f"Could not extract price from message: {hook_resp.message}")
                return HttpResponseBadRequest("Could not extract price from message")

        base = hook_resp.market.item
        quote = hook_resp.market.currency
        symbol = f"{base.upper()}/{quote.upper()}"

        data = {
            "title": hook_resp.title,
            "message": hook_resp.message,
            "period": hook_resp.period,
            "sent": hook_resp.timestamp.sent,
            "trade": hook_resp.timestamp.trade,
            "exchange": hook_resp.market.exchange,
            "base": hook_resp.market.item,
            "quote": hook_resp.market.currency,
            "symbol": symbol,
            "contract": hook_resp.market.contract,
            "price": price,
        }

        log.debug("HookAPI callback: data: %s", data)

        # Try getting the hook
        try:
            hook = Hook.objects.get(hook=hook_name)
        except Hook.DoesNotExist:
            return HttpResponseBadRequest("Hook does not exist.")

        # Try getting the signal
        # AUCAD 3M Stoch Exit: C$2419.64 at OANDA
        # >>> a.split(":")[0:]
        # ['AUCAD 3M Stoch Exit', ' C$2419.64 at OANDA']
        # >>> a.split(":")[0].split(" ")[2:]
        # ['Stoch', 'Exit']
        # >>> " ".join(a.split(":")[0].split(" ")[2:])
        # 'Stoch Exit'

        signal_name = " ".join(hook_resp.message.split(":")[0].split(" ")[2:])
        for x in signal_name:
            if x in digits:
                signal_name = signal_name.replace(x, "?")
        try:
            signal = Signal.objects.get(signal=signal_name)
        except Signal.DoesNotExist:
            return HttpResponseBadRequest("Signal does not exist.")

        # For uptime checks/testing
        if data["exchange"].lower() == "n/a":
            log.debug("HookAPI callback: exchange is N/A, skipping")
            return HttpResponse("OK")

        # Set the signal relation
        data["signal"] = signal

        # Create the callback object
        callback = Callback.objects.create(hook=hook, **data)
        callback.save()
        market.process_callback(callback)
        # Bump received count
        hook.received = hook.received + 1
        signal.received = signal.received + 1
        hook.save()
        signal.save()

        return HttpResponse("OK")

    def get(self, request, hook_name):
        try:
            hook = Hook.objects.get(hook=hook_name)
        except Hook.DoesNotExist:
            return HttpResponseBadRequest("Hook does not exist.")
        signals = Signal.objects.filter(hook=hook)

        return_data = {
            "name": hook.name,
            "hook": hook.hook,
            "hook_id": hook.id,
            "signals": len(signals),
        }
        return HttpResponse(orjson.dumps(return_data), content_type="application/json")


class HookList(LoginRequiredMixin, ObjectList):
    # window_content = "window-content/hooks.html"
    list_template = "partials/hook-list.html"
    model = Hook
    page_title = "List of active URL endpoints for receiving hooks."
    page_subtitle = (
        "Add URLs here to receive Drakdoo callbacks. "
        "Make then unique and hard to guess!"
    )

    list_url_name = "hooks"
    list_url_args = ["type"]

    submit_url_name = "hook_create"


class HookCreate(LoginRequiredMixin, ObjectCreate):
    model = Hook
    form_class = HookForm

    submit_url_name = "hook_create"


class HookUpdate(LoginRequiredMixin, ObjectUpdate):
    model = Hook
    form_class = HookForm

    submit_url_name = "hook_update"


class HookDelete(LoginRequiredMixin, ObjectDelete):
    model = Hook