Titivillus/quest/events.py

#!/usr/bin/env python3
"""
Individual functions for handling WebSocket events. Gets called by the
QuestConsumer object in consumers.py.
"""
import re
import time
import types
import random

import bleach
from django.utils.timezone import localtime

from quest.models import Message, Quest, Post

def message(socket, data):
	"""
	Gets called when the server receives a 'message' event.
	"""
	# TODO: validation
	message = data.get('message')
	quest_id = data.get('quest_id')

	# cleaning
	message = message.strip()
	if not message:
		return
	tags = ["b", "code", "i", "s"]
	message = bleach.clean(message, tags=tags)

	# greentext
	lines = []
	for line in message.splitlines():
		if line.startswith(">") and not line.startswith(">>"):
			line = '<span class="greenText">' + line + '</span>'
		lines.append(line)
	message = "<br>".join(lines)

	# quote links
	quotes = re.findall(r"&gt;&gt;\d+", message)
	for quote in quotes:
		msg_id = quote.replace("&gt;&gt;", "")
		msg = '<a class="quotelink" '
		msg += 'href="javascript:scrollToMsg(\'' + msg_id + '\')" '
		msg += 'onmousemove="showPreview(event, \'' + msg_id + '\')" '
		msg += 'onmouseout="clearPreview()">' + quote + '</a>'
		message = message.replace(quote, msg)

	# handle image

	# dice rolling
	if any(map(message.startswith, ["/dice", "/roll"])):
		reg = re.search(r"(\d+)d(\d+)([+-]\d+)?", data["message"])
		if not reg:
			return
		try:
			groups = [0 if d is None else int(d) for d in reg.groups()]
			dice_num, dice_sides, dice_mod = groups
			assert 0 < dice_num < 100
			assert 0 < dice_sides < 100
			assert -1000 < dice_mod < 1000
		except (ValueError, AssertionError):
			return
		dice = [random.randint(1, dice_sides) for _ in range(dice_num)]
		total = sum(dice) + dice_mod
		roll_msg = f"Rolled {', '.join(map(str, dice))}"
		if dice_mod:
			if dice_mod > 0:
				roll_msg += " + " + str(dice_mod)
			else:
				roll_msg += " - " + str(dice_mod)[1:]
		roll_msg += " = " + str(total)
		message += '<hr class="msgSrvHr" /><b>' + roll_msg + "</b>"

	user = socket.scope['user']

	m = Message(
		quest=Quest.objects.get(id=quest_id),
		message=message)
	if user.username:
		m.user = user
	m.save()

	data = {}
	data['message_id'] = m.id
	data['message'] = message
	data['date'] = int(time.time())
	data['name'] = user.username
	socket.send('message', data)


def text_post(socket, data):
	"""
	Called when the QM creates a new text post.
	"""
	quest_id = data.get('quest_id')
	text = data.get('text')
	page_num = data.get('page_num')

	# cleaning
	text = bleach.clean(text.strip())
	text = text.replace("\n", "<br>")

	# handle image

	p = Post(
		quest=Quest.objects.get(id=quest_id),
		page_num=page_num,
		post_type='text',
		post_text=text)
	p.save()

	data = {}
	data['text'] = text
	data['post_type'] = 'text'
	data['date'] = localtime(p.timestamp).strftime('%Y-%m-%d %H:%M')
	data['post_id'] = p.id
	socket.send('new_post', data)


events = {}
for obj in dir():
	if type(locals()[obj]) == types.FunctionType:
		events[locals()[obj].__name__] = locals()[obj]