#!/usr/bin/env python3
# toot downloader version two!!
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

from mastodon import Mastodon
from os import path
from bs4 import BeautifulSoup
import os, sqlite3, signal, sys, json, re, shutil
import requests
import functions

scopes = ["read:statuses", "read:accounts", "read:follows", "write:statuses", "read:notifications"]
#cfg defaults
cfg = {
	"site": "https://botsin.space",
	"cw": None,
	"instance_blacklist": ["bofa.lol", "witches.town"],
	"learn_from_cw": False,
	"mention_handling": 1,
	"max_thread_length": 15
}
try:
	cfg.update(json.load(open('config.json', 'r')))
except:

	shutil.copy2("config.sample.json", "config.json")
	cfg.update(json.load(open('config.json', 'r')))

#if the user is using a (very!) old version that still uses the .secret files, migrate to the new method
if os.path.exists("clientcred.secret"):
	print("Upgrading to new storage method")
	cc = open("clientcred.secret").read().split("\n")
	cfg['client'] = {
			"id": cc[0],
			"secret": cc[1]
	}
	cfg['secret'] = open("usercred.secret").read().rstrip("\n")
	os.remove("clientcred.secret")
	os.remove("usercred.secret")


if "client" not in cfg:
	print("No application info -- registering application with {}".format(cfg['site']))
	client_id, client_secret = Mastodon.create_app("mstdn-ebooks",
		api_base_url=cfg['site'],
		scopes=scopes,
		website="https://github.com/Lynnesbian/mstdn-ebooks")

	cfg['client'] = {
		"id": client_id,
		"secret": client_secret
	}

if "secret" not in cfg:
	print("No user credentials -- logging in to {}".format(cfg['site']))
	client = Mastodon(client_id = cfg['client']['id'],
		client_secret = cfg['client']['secret'],
		api_base_url=cfg['site'])

	print("Open this URL and authenticate to give mstdn-ebooks access to your bot's account: {}".format(client.auth_request_url(scopes=scopes)))
	cfg['secret'] = client.log_in(code=input("Secret: "), scopes=scopes)

json.dump(cfg, open("config.json", "w+"))

def extract_toot(toot):
	toot = functions.extract_toot(toot)
	toot = toot.replace("@", "@\u200B") #put a zws between @ and username to avoid mentioning
	return(toot)

client = Mastodon(
	client_id=cfg['client']['id'],
	client_secret = cfg['client']['secret'],
	access_token=cfg['secret'],
	api_base_url=cfg['site'])

me = client.account_verify_credentials()
following = client.account_following(me.id)

db = sqlite3.connect("toots.db")
db.text_factory=str
c = db.cursor()
c.execute("CREATE TABLE IF NOT EXISTS `toots` (id INT NOT NULL UNIQUE PRIMARY KEY, cw INT NOT NULL DEFAULT 0, userid INT NOT NULL, uri VARCHAR NOT NULL, content VARCHAR NOT NULL) WITHOUT ROWID")
try:
	c.execute("ALTER TABLE `toots` ADD COLUMN cw INT NOT NULL DEFAULT 0")
except:
	pass # column already exists
db.commit()

def handleCtrlC(signal, frame):
	print("\nPREMATURE EVACUATION - Saving chunks")
	db.commit()
	sys.exit(1)

signal.signal(signal.SIGINT, handleCtrlC)

patterns = {
	"handle": re.compile(r"^.*@(.+)"),
	"url": re.compile(r"https?:\/\/(.*)"),
	"uri": re.compile(r'template="([^"]+)"'),
	"pid": re.compile(r"[^\/]+$"),
}


def insert_toot(oii, acc, post, cursor):  # extracted to prevent duplication
	pid = patterns["pid"].search(oii['object']['id']).group(0)
	cursor.execute("REPLACE INTO toots (id, cw, userid, uri, content) VALUES (?, ?, ?, ?, ?)", (
		pid,
		1 if (oii['object']['summary'] != None and oii['object']['summary'] != "") else 0,
		acc.id,
		oii['object']['id'],
		post
	))


for f in following:
	last_toot = c.execute("SELECT id FROM `toots` WHERE userid LIKE ? ORDER BY id DESC LIMIT 1", (f.id,)).fetchone()
	if last_toot != None:
		last_toot = last_toot[0]
	else:
		last_toot = 0
	print("Harvesting toots for user @{}, starting from {}".format(f.acct, last_toot))

	#find the user's activitypub outbox
	print("WebFingering...")
	instance = patterns["handle"].search(f.acct)
	if instance == None:
		instance = patterns["url"].search(cfg['site']).group(1)
	else:
		instance = instance.group(1)

	if instance in cfg['instance_blacklist']:
		print("skipping blacklisted instance: {}".format(instance))
		continue

	try:
		r = requests.get("https://{}/.well-known/host-meta".format(instance), timeout=10)
		uri = patterns["uri"].search(r.text).group(1)
		uri = uri.format(uri = "{}@{}".format(f.username, instance))
		r = requests.get(uri, headers={"Accept": "application/json"}, timeout=10)
		j = r.json()
		for link in j['links']:
			if link['rel'] == 'self':
				#this is a link formatted like "https://instan.ce/users/username", which is what we need
				uri = link['href']
		uri = "{}/outbox?page=true".format(uri)
		r = requests.get(uri, timeout=10)
		j = r.json()
	except Exception:
		print("oopsy woopsy!! we made a fucky wucky!!!\n(we're probably rate limited, please hang up and try again)")
		sys.exit(1)

	pleroma = False
	if 'first' in j and type(j['first']) != str:
		print("Pleroma instance detected")
		pleroma = True
		j = j['first']
	else:
		print("Mastodon/Misskey instance detected")
		uri = "{}&min_id={}".format(uri, last_toot)
		r = requests.get(uri)
		j = r.json()

	print("Downloading and saving toots", end='', flush=True)
	done = False
	try:
		while not done and len(j['orderedItems']) > 0:
			for oi in j['orderedItems']:
				if oi['type'] != "Create":
					continue #this isn't a toot/post/status/whatever, it's a boost or a follow or some other activitypub thing. ignore

				# its a toost baby
				content = oi['object']['content']
				toot = extract_toot(content)
				# print(toot)
				try:
					if pleroma:
						if c.execute("SELECT COUNT(*) FROM toots WHERE uri LIKE ?", (oi['object']['id'],)).fetchone()[0] > 0:
							#we've caught up to the notices we've already downloaded, so we can stop now
							#you might be wondering, "lynne, what if the instance ratelimits you after 40 posts, and they've made 60 since main.py was last run? wouldn't the bot miss 20 posts and never be able to see them?" to which i reply, "it's called mstdn-ebooks not fediverse-ebooks. pleroma support is an afterthought"
							done = True
					if cfg['lang']:
						if oi['object']['contentMap'][cfg['lang']]:  # filter for language
							insert_toot(oi, f, toot, c)
					else:
						insert_toot(oi, f, toot, c)
					pass
				except:
					pass #ignore any toots that don't successfully go into the DB
			if not pleroma:
				r = requests.get(j['prev'], timeout=15)
			else:
				r = requests.get(j['next'], timeout=15)
			j = r.json()
			print('.', end='', flush=True)
		print(" Done!")
		db.commit()
	except:
		print("Encountered an error! Saving toots to database and moving to next followed account.")
		db.commit()

print("Done!")

db.commit()
db.execute("VACUUM") #compact db
db.commit()
db.close()