# This is the code behind Helpful Jew.

# Helpful Jew is a Telegram bot that parses RSS feeds
# and sends notifications when new entry is found

# The name "Helpful Jew" was chosed to fight anti-semitism
# People should know that Jews are not evil
# and that Jews want to help others.

# Created by KuchiKuu
# 2022-04-16

import feedparser
import telebot
import threading # for RSS feed to check from time to time
import time # for sleep
import json

TOKEN="Jews Are OK. Np. All good."

# file structure:
#  feeds - contains JSON of RSS_FEED: [groupID,groupID]
#  entries - contains hashed values of posts already sent

feeds = {}
entries = []

with open("helpfuljew_feeds") as f:
	feeds = json.load(f)
with open("helpfuljew_entries") as f:
	entries = json.load(f)

if(len(feeds.keys())>0):
	print(f'{len(feeds.keys())} feeds in database')
else:
	print("feeds are empty")
#exit()
def json_save_feeds():
	with open("helpfuljew_feeds","w") as f:
		json.dump(feeds,f)
def json_save_entries():
	with open("helpfuljew_entries","w") as f:
		json.dump(entries,f)

def fetch_first_time(fetch_first_time_address):
	entries_number=0
	fetch_first_time_feed = feedparser.parse(fetch_first_time_address);
	for entry in fetch_first_time_feed['entries']:
		hash=entry['title']+" "+entry['published']+" "+entry['id']
		if hash not in entries:
			entries.append(hash)
			entries_number=entries_number+1
	json_save_entries()
	print("Saved "+str(entries_number)+" from "+fetch_first_time_address)

def check_feeds():
	while(1):
		check_feeds_feeds = feeds
		check_feeds_entries = entries
		print("Checking feeds")
		if(len(check_feeds_feeds.keys())>0):
			for address in check_feeds_feeds.keys():
				feed=feedparser.parse(address)
				for entry in feed['entries']:
					#print(entry['title']+" "+entry['published']+" "+entry['id']);
					hash=entry['title']+" "+entry['published']+" "+entry['id']
					if hash not in entries:
						for group in check_feeds_feeds[address]:
							text="*"+feed["feed"]["title"]+"*\nNew entry!\n\n"+entry["title"]+"\n"+entry["summary"][:100]+"...\n"+entry['link']
							bot.send_message(group,text);
							entries.append(hash)
							json_save_entries()
		time.sleep(3600);

bot = telebot.TeleBot(TOKEN,parse_mode=None)

@bot.message_handler(commands=['follow','remove','list'])
def database_management_yolo(message):
	#print(message)
	command = message.text.split(" ")
	if(command[0] == "/follow"):
		if(len(command[1])>0):
			feed_address = command[1]
			check_feed = feedparser.parse(command[1])
			if(len(check_feed["entries"])==0):
				bot.reply_to(message,"Oy vey! This does not look like a valid RSS!")
			else:
				if feed_address in feeds.keys():
					if message.chat.id not in feeds[feed_address]:
						feeds[feed_address].append(message.chat.id)
						bot.reply_to(message,"Following: "+feed_address)
						fetch_first_time(feed_address)
					else:
						bot.reply_to(message,"I already follow this feed for you.")
				else:
					feeds[feed_address] = [message.chat.id]
					bot.reply_to(message,"Following: "+feed_address)
					fetch_first_time(feed_address)

			#bot.reply_to(message,str(json.dumps(feeds)))
				json_save_feeds();
	if(command[0] == "/remove"):
		if(len(command[1])>0):
			feeds[command[1]].remove(message.chat.id)
			if(len(feeds[command[1]]) == 0):
				feeds.pop(command[1])
				print("No one else follows "+str(command[1]))
			bot.reply_to(message,"Removing: "+command[1])
			json_save_feeds()
	if(command[0] == "/list"):
		list_feeds = []
		for i in feeds.keys():
			if message.chat.id in feeds[i]:
				list_feeds.append(i)
		bot.reply_to(message,"Your feeds:\n"+str(list_feeds))

#@bot.message_handler(func=lambda m: True)
#def echo_all(message):
#	print("Got a message: " + str(message))
#	bot.reply_to(message,str(bot.get_me()))

#@bot.channel_post_handler(func=lambda m:True)
#def reply_to_post(message):
#	bot.reply_to(message,str(bot.get_Me()))

@bot.my_chat_member_handler()
def membership(ChatMemberUpdated):
	if(ChatMemberUpdated.new_chat_member.user.id == bot.get_me().id):
		if(ChatMemberUpdated.new_chat_member.status == "member"):
			print("I have joined a chat")
			bot.send_message(ChatMemberUpdated.chat.id,"Asalamalaykum my brothers.")
		elif(ChatMemberUpdated.new_chat_member.status == "left"):
			print("I have been removed from a chat.")

x = threading.Thread(target=check_feeds)
x.start()

bot.infinity_polling()