commit e72b09142b7210249825de1797220e31e76e6c0b Author: Tulir Asokan Date: Tue Nov 27 02:33:41 2018 +0200 Initial commit diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..a60ef10 --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +*.mbp diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..be3f7b2 --- /dev/null +++ b/LICENSE @@ -0,0 +1,661 @@ + GNU AFFERO GENERAL PUBLIC LICENSE + Version 3, 19 November 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU Affero General Public License is a free, copyleft license for +software and other kinds of works, specifically designed to ensure +cooperation with the community in the case of network server software. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If your software can interact with users remotely through a computer +network, you should also make sure that it provides a way for users to +get its source. For example, if your program is a web application, its +interface could display a "Source" link that leads users to an archive +of the code. There are many ways you could offer source, and different +solutions will be better for different programs; see section 13 for the +specific requirements. + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU AGPL, see +. diff --git a/README.md b/README.md new file mode 100644 index 0000000..5c015e1 --- /dev/null +++ b/README.md @@ -0,0 +1,2 @@ +# rss +A [maubot](https://github.com/maubot/maubot) that posts updates in RSS feeds. diff --git a/base-config.yaml b/base-config.yaml new file mode 100644 index 0000000..8b1d367 --- /dev/null +++ b/base-config.yaml @@ -0,0 +1,5 @@ +# Feed update interval in minutes +update_interval: 60 +# The time to sleep between send requests when broadcasting a new feed entry. +# Set to 0 to disable sleep or -1 to run all requests asynchronously at once. +spam_sleep: 2 diff --git a/build.sh b/build.sh new file mode 100755 index 0000000..80ee384 --- /dev/null +++ b/build.sh @@ -0,0 +1,2 @@ +#!/bin/bash +zip -9r rss.mbp rss/ base-config.yaml maubot.ini diff --git a/maubot.ini b/maubot.ini new file mode 100644 index 0000000..a68ae99 --- /dev/null +++ b/maubot.ini @@ -0,0 +1,7 @@ +[maubot] +ID = xyz.maubot.rss +Version = 0.1.0 +License = AGPL-3.0-or-later +Modules = rss +MainClass = RSSBot +ExtraFiles = base-config.yaml diff --git a/rss/__init__.py b/rss/__init__.py new file mode 100644 index 0000000..95623a1 --- /dev/null +++ b/rss/__init__.py @@ -0,0 +1 @@ +from .bot import RSSBot diff --git a/rss/bot.py b/rss/bot.py new file mode 100644 index 0000000..cc025f9 --- /dev/null +++ b/rss/bot.py @@ -0,0 +1,154 @@ +# rss - A maubot plugin to subscribe to RSS/Atom feeds. +# Copyright (C) 2018 Tulir Asokan +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU Affero General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU Affero General Public License for more details. +# +# You should have received a copy of the GNU Affero General Public License +# along with this program. If not, see . +from typing import Type, List, Any +from datetime import datetime +from time import mktime +import asyncio + +import aiohttp +import feedparser + +from maubot import Plugin, MessageEvent +from mautrix.util.config import BaseProxyConfig, ConfigUpdateHelper +from mautrix.types import EventType, MessageType, RoomID + +from .db import Database, Feed, Entry + + +class Config(BaseProxyConfig): + def do_update(self, helper: ConfigUpdateHelper) -> None: + helper.copy("update_interval") + helper.copy("spam_sleep") + + +class RSSBot(Plugin): + db: Database + poll_task: asyncio.Future + http: aiohttp.ClientSession + + @classmethod + def get_config_class(cls) -> Type[BaseProxyConfig]: + return Config + + async def start(self) -> None: + self.config.load_and_update() + self.db = Database(self.request_db_engine()) + self.client.add_event_handler(self.event_handler, EventType.ROOM_MESSAGE) + self.http = self.client.api.session + + self.poll_task = asyncio.ensure_future(self.poll_feeds(), loop=self.loop) + + async def stop(self) -> None: + self.client.remove_event_handler(self.event_handler, EventType.ROOM_MESSAGE) + self.poll_task.cancel() + + async def poll_feeds(self) -> None: + try: + await self._poll_feeds() + except asyncio.CancelledError: + self.log.debug("Polling stopped") + pass + except Exception: + self.log.exception("Failed to poll feeds") + + async def _broadcast(self, feed: Feed, entry: Entry, subscriptions: List[RoomID]) -> None: + text = f"New post in {feed.title}: {entry.title} ({entry.link})" + html = f"New post in {feed.title}: {entry.title}" + spam_sleep = self.config["spam_sleep"] + tasks = [self.client.send_notice(room_id, text=text, html=html) for room_id in + subscriptions] + if spam_sleep >= 0: + for task in tasks: + await task + await asyncio.sleep(spam_sleep, loop=self.loop) + else: + await asyncio.gather(*tasks) + + async def _poll_once(self) -> None: + subs = self.db.get_feeds() + if not subs: + return + responses = await asyncio.gather(*[self.http.get(feed.url) for feed in subs], loop=self.loop) + texts = await asyncio.gather(*[resp.text() for resp in responses], loop=self.loop) + for feed, data in zip(subs, texts): + parsed_data = feedparser.parse(data) + entries = parsed_data.entries + new_entries = {entry.id: entry for entry in self.find_entries(feed.id, entries)} + for old_entry in self.db.get_entries(feed.id): + new_entries.pop(old_entry.id, None) + self.db.add_entries(new_entries.values()) + for entry in new_entries.values(): + await self._broadcast(feed, entry, feed.subscriptions) + + async def _poll_feeds(self) -> None: + self.log.debug("Polling started") + while True: + await self._poll_once() + await asyncio.sleep(self.config["update_interval"] * 60, loop=self.loop) + + async def read_feed(self, url: str): + resp = await self.http.get(url) + content = await resp.text() + return feedparser.parse(content) + + @staticmethod + def find_entries(feed_id: int, entries: List[Any]) -> List[Entry]: + return [Entry( + feed_id=feed_id, + id=entry.id, + date=datetime.fromtimestamp(mktime(entry.published_parsed)), + title=entry.title, + summary=entry.description, + link=entry.link, + ) for entry in entries] + + async def event_handler(self, evt: MessageEvent) -> None: + if evt.content.msgtype != MessageType.TEXT or not evt.content.body.startswith("!rss"): + return + + args = evt.content.body[len("!rss "):].split(" ") + cmd, args = args[0].lower(), args[1:] + if cmd == "sub" or cmd == "subscribe": + if len(args) == 0: + await evt.reply(f"**Usage:** !rss {cmd} ") + return + url = " ".join(args) + feed = self.db.get_feed_by_url(url) + if not feed: + metadata = await self.read_feed(url) + feed = self.db.create_feed(url, metadata["channel"]["title"], + metadata["channel"]["description"], + metadata["channel"]["link"]) + self.db.add_entries(self.find_entries(feed.id, metadata.entries)) + self.db.subscribe(feed.id, evt.room_id, evt.sender) + await evt.reply(f"Subscribed to feed ID {feed.id}: [{feed.title}]({feed.url})") + elif cmd == "unsub" or cmd == "unsubscribe": + if len(args) == 0: + await evt.reply(f"**Usage:** !rss {cmd} ") + return + feed = self.db.get_feed_by_id_or_url(" ".join(args)) + if not feed: + await evt.reply("Feed not found") + return + self.db.unsubscribe(feed.id, evt.room_id) + await evt.reply(f"Unsubscribed from feed ID {feed.id}: [{feed.title}]({feed.url})") + elif cmd == "subs" or cmd == "subscriptions": + subscriptions = self.db.get_feeds_by_room(evt.room_id) + await evt.reply("**Subscriptions in this room:**\n\n" + + "\n".join(f"* {feed.id} - [{feed.title}]({feed.url})" + for feed in subscriptions)) + else: + await evt.reply("**Usage:** !rss [params...]") diff --git a/rss/db.py b/rss/db.py new file mode 100644 index 0000000..7fedb3b --- /dev/null +++ b/rss/db.py @@ -0,0 +1,123 @@ +# rss - A maubot plugin to subscribe to RSS/Atom feeds. +# Copyright (C) 2018 Tulir Asokan +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU Affero General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU Affero General Public License for more details. +# +# You should have received a copy of the GNU Affero General Public License +# along with this program. If not, see . +from typing import Iterable, NamedTuple, List, Optional, Dict +from datetime import datetime + +from sqlalchemy import (Column, String, Integer, DateTime, Text, ForeignKey, + Table, MetaData, + select, and_, or_) +from sqlalchemy.engine.base import Engine + +from mautrix.types import UserID, RoomID + +Feed = NamedTuple("Feed", id=int, url=str, title=str, subtitle=str, link=str, + subscriptions=List[RoomID]) +Entry = NamedTuple("Entry", feed_id=int, id=str, date=datetime, title=str, summary=str, link=str) + + +class Database: + db: Engine + feed: Table + subscription: Table + entry: Table + version: Table + + def __init__(self, db: Engine) -> None: + self.db = db + metadata = MetaData() + self.feed = Table("feed", metadata, + Column("id", Integer, primary_key=True, autoincrement=True), + Column("url", Text, nullable=False, unique=True), + Column("title", Text, nullable=False), + Column("subtitle", Text, nullable=False), + Column("link", Text, nullable=False)) + self.subscription = Table("subscription", metadata, + Column("feed_id", Integer, ForeignKey("feed.id"), + primary_key=True), + Column("room_id", String(255), primary_key=True), + Column("user_id", String(255), nullable=False)) + self.entry = Table("entry", metadata, + Column("feed_id", Integer, ForeignKey("feed.id"), primary_key=True), + Column("id", String(255), primary_key=True), + Column("date", DateTime, nullable=False), + Column("title", Text, nullable=False), + Column("summary", Text, nullable=False), + Column("link", Text, nullable=False)) + self.version = Table("version", metadata, + Column("version", Integer, primary_key=True)) + metadata.create_all(db) + + def get_feeds(self) -> Iterable[Feed]: + rows = self.db.execute(select([self.feed, self.subscription.c.room_id]) + .where(self.subscription.c.feed_id == self.feed.c.id)) + map: Dict[int, Feed] = {} + for row in rows: + feed_id, url, title, subtitle, link, room_id = row + map.setdefault(feed_id, Feed(feed_id, url, title, subtitle, link, subscriptions=[])) + map[feed_id].subscriptions.append(room_id) + return map.values() + + def get_feeds_by_room(self, room_id: RoomID) -> Iterable[Feed]: + return (Feed(*row, subscriptions=[]) for row in + self.db.execute(select([self.feed]) + .where(and_(self.subscription.c.room_id == room_id, + self.subscription.c.feed_id == self.feed.c.id)))) + + def get_rooms_by_feed(self, feed_id: int) -> Iterable[RoomID]: + return (row[0] for row in + self.db.execute(select([self.subscription.c.room_id]) + .where(self.subscription.c.feed_id == feed_id))) + + def get_entries(self, feed_id: int) -> Iterable[Entry]: + return (Entry(*row) for row in + self.db.execute(select([self.entry]).where(self.entry.c.feed_id == feed_id))) + + def add_entries(self, entries: Iterable[Entry]) -> None: + if not entries: + return + self.db.execute(self.entry.insert(), [entry._asdict() for entry in entries]) + + def get_feed_by_url(self, url: str) -> Optional[Feed]: + rows = self.db.execute(select([self.feed]).where(self.feed.c.url == url)) + try: + row = next(rows) + return Feed(*row, subscriptions=[]) + except (StopIteration, IndexError): + return None + + def get_feed_by_id_or_url(self, identifier: str) -> Optional[Feed]: + rows = self.db.execute(select([self.feed]).where( + or_(self.feed.c.url == identifier, self.feed.c.id == identifier))) + try: + row = next(rows) + return Feed(*row, subscriptions=[]) + except (StopIteration, IndexError): + return None + + def create_feed(self, url: str, title: str, subtitle: str, link: str) -> Feed: + res = self.db.execute(self.feed.insert().values(url=url, title=title, subtitle=subtitle, + link=link)) + return Feed(id=res.inserted_primary_key[0], url=url, title=title, subtitle=subtitle, + link=link, subscriptions=[]) + + def subscribe(self, feed_id: int, room_id: RoomID, user_id: UserID) -> None: + self.db.execute(self.subscription.insert().values(feed_id=feed_id, room_id=room_id, + user_id=user_id)) + + def unsubscribe(self, feed_id: int, room_id: RoomID) -> None: + tbl = self.subscription + self.db.execute(tbl.delete().where(and_(tbl.c.feed_id == feed_id, + tbl.c.room_id == room_id))) diff --git a/rss/migrations.py b/rss/migrations.py new file mode 100644 index 0000000..395ab2f --- /dev/null +++ b/rss/migrations.py @@ -0,0 +1,25 @@ +# rss - A maubot plugin to subscribe to RSS/Atom feeds. +# Copyright (C) 2018 Tulir Asokan +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU Affero General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU Affero General Public License for more details. +# +# You should have received a copy of the GNU Affero General Public License +# along with this program. If not, see . +from sqlalchemy import select +from sqlalchemy.engine.base import Engine +from alembic.migration import MigrationContext +from alembic.operations import Operations + + +def run(engine: Engine): + conn = engine.connect() + ctx = MigrationContext.configure(conn) + op = Operations(ctx)