use nix-shell shebang and a cronjob to get this off my back for now
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README.md
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3
README.md
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## RSS Notifier
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A python script which checks an RSS feed for new entries and sends
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notifications to any libnotify-compatible Linux Desktop when it finds them.
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64
rss_notifier.py
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64
rss_notifier.py
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#!/usr/bin/env nix-shell
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#! nix-shell -i python -p python3 libnotify python3Packages.beautifulsoup4 python3Packages.lxml python3Packages.requests
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from requests import get
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from requests import get
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from sqlite3 import Connection as SQL, Cursor
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from sqlite3 import Connection as SQL, Cursor
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from contextlib import contextmanager
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from contextlib import contextmanager
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@ -6,27 +8,33 @@ from sys import argv, stderr
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from dataclasses import dataclass
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from dataclasses import dataclass
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from typing import *
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from typing import *
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from subprocess import Popen, PIPE, run
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from subprocess import Popen, PIPE, run
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from os import execvp, environ
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from os import execvp, environ, makedirs
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from json import dumps, loads
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from json import dumps, loads
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from pathlib import Path
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@dataclass
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@dataclass
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class Feed:
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class Feed:
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id: int
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id: int
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url: str
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url: str
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title: Optional[str] = None
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content: Optional[Soup] = None
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content: Optional[Soup] = None
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def fetch(self):
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def fetch_content(self):
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res = get(self.url)
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res = get(self.url)
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res.raise_for_status()
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res.raise_for_status()
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self.content = Soup(res.text, features="xml")
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self.content = Soup(res.text, features="xml")
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if title_tag := self.content.find('title'):
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self.title = title_tag.text
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else:
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print(f'warning: no title for feed {self.url!r}')
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return self
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return self
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def entries(self):
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def entries(self):
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if content := self.content:
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if content := self.content:
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return content.find_all('entry')
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return content.find_all('entry')
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else:
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else:
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return self.fetch().entries()
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return self.fetch_content().entries()
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@classmethod
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@classmethod
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def from_record(cls, record):
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def from_record(cls, record):
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@ -42,7 +50,7 @@ class Feed:
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return hash(self.id)
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return hash(self.id)
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def to_dict(self):
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def to_dict(self):
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return {'id': self.id, 'url': self.url}
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return {'id': self.id, 'url': self.url, 'title': self.title}
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def to_json(self) -> str:
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def to_json(self) -> str:
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return dumps(self.to_dict())
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return dumps(self.to_dict())
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@ -50,7 +58,7 @@ class Feed:
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@classmethod
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@classmethod
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def from_json(cls, text: str) -> 'Feed':
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def from_json(cls, text: str) -> 'Feed':
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data = loads(text)
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data = loads(text)
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return cls(id=data['id'], url=data['url'])
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return cls(id=data['id'], url=data['url'], title=data['title'])
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ACTIONS = ['--action', 'open=Open link', '--action', 'read=Mark read']
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ACTIONS = ['--action', 'open=Open link', '--action', 'read=Mark read']
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@ -65,10 +73,16 @@ class FeedEntry:
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@classmethod
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@classmethod
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def select_all(cls, db_connection) -> List['FeedEntry']:
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def select_all(cls, db_connection) -> List['FeedEntry']:
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feed_entries = db_connection.cursor().execute("select entry.*, feed.url from entries entry join feeds feed on feed.id = entry.feed_id;").fetchall()
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query = '''
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select entry.*, feed.url, feed.title
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from entries entry
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join feeds feed
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on feed.id = entry.feed_id;
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'''
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feed_entries = db_connection.cursor().execute(query).fetchall()
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return set(
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return set(
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FeedEntry(id, Feed(feed_id, feed_url), upstream_id, title, link, read)
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FeedEntry(id, Feed(feed_id, feed_url, feed_title), upstream_id, title, link, read)
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for id, feed_id, upstream_id, title, link, read, feed_url,
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for id, feed_id, upstream_id, title, link, read, feed_url, feed_title
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in feed_entries
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in feed_entries
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)
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)
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@ -83,7 +97,10 @@ class FeedEntry:
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def to_json(self) -> str:
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def to_json(self) -> str:
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assert list(self.__dict__.keys()) == "id feed upstream_id title link read".split()
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assert list(self.__dict__.keys()) == "id feed upstream_id title link read".split()
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return dumps({ k: v.to_dict() if k == 'feed' else v for k, v in self.__dict__.items() })
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return dumps({
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k: v.to_dict() if k == 'feed' else v
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for k, v in self.__dict__.items()
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})
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@classmethod
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@classmethod
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def from_json(cls, data) -> 'FeedEntry':
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def from_json(cls, data) -> 'FeedEntry':
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@ -118,7 +135,7 @@ class FeedEntry:
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self.upstream_id,
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self.upstream_id,
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self.title,
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self.title,
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self.link,
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self.link,
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self.mark_read
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self.read
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)
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)
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)
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)
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@ -133,9 +150,13 @@ class RSSNotifier:
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def create_tables(self):
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def create_tables(self):
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db = self.db_connection.cursor()
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db = self.db_connection.cursor()
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db.execute(
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db.execute('''
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'create table if not exists feeds (id integer primary key autoincrement, url text)'
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create table if not exists feeds (
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)
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id integer primary key autoincrement,
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url text unique not null,
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title text
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);
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''')
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db.execute('''
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db.execute('''
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create table if not exists entries (
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create table if not exists entries (
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id integer primary key autoincrement,
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id integer primary key autoincrement,
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@ -154,9 +175,9 @@ class RSSNotifier:
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return map(Feed, feeds)
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return map(Feed, feeds)
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def add_feed(self, url: str, mark_read: bool):
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def add_feed(self, url: str, mark_read: bool):
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feed = Feed(-1, url).fetch()
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feed = Feed(-1, url).fetch_content()
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cursor = self.db_connection.cursor()
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cursor = self.db_connection.cursor()
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cursor.execute("insert into feeds (url) values (?)", (url,))
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cursor.execute("insert into feeds (url, title) values (?, ?)", (url, feed.title))
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feed.id = cursor.lastrowid
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feed.id = cursor.lastrowid
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for entry in feed.entries():
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for entry in feed.entries():
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FeedEntry.from_rss(entry, feed, mark_read).insert(cursor)
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FeedEntry.from_rss(entry, feed, mark_read).insert(cursor)
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def parse_args(self, args=None):
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def parse_args(self, args=None):
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mark_read = True
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mark_read = True
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if args is None:
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if args is None:
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args = argv
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args = argv[1:]
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feeds_to_add = []
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feeds_to_add = []
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try:
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try:
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while True:
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while True:
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'--expire-time', '0',
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'--expire-time', '0',
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'--app-name', 'RSS Notifier',
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'--app-name', 'RSS Notifier',
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*ACTIONS,
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*ACTIONS,
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f'New RSS Story: {entry.title}'
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f'New RSS Story from {entry.feed.title}: {entry.title}'
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],
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],
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stdout=PIPE,
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stdout=PIPE,
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stderr=PIPE
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stderr=PIPE
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if __name__ == "__main__":
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if __name__ == "__main__":
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RSSNotifier(environ.get("RSS_NOTIFIER_DATABASE_LOCATION") or Path(environ.get("HOME")) / ".local/state/rss-notifier/db.sqlite3").parse_args()
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db_path = environ.get("RSS_NOTIFIER_DATABASE_LOCATION")
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if db_path is None:
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db_path = Path(environ.get("HOME")) / ".local/state/rss-notifier/db.sqlite3"
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else:
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db_path = Path(db_path)
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if not db_path.parent.exists():
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makedirs(db_path.parent)
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RSSNotifier(db_path).parse_args()
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