471 lines
No EOL
14 KiB
Python
471 lines
No EOL
14 KiB
Python
#!/usr/bin/env python3
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"""
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Fetch ICS + RSS events from do.basspistol.org and publish them as
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NIP-52 calendar events (kind 31923) to Nostr relays, requesting
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inclusion in a kind 31924 calendar.
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Only relays that accept the event kind without requiring NIP-42 auth
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are used. Relays that send an AUTH challenge are skipped.
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Usage:
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publish.py # normal run
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publish.py --dry-run # log what would be published, no DB writes, no relay calls
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"""
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import hashlib
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import logging
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import re
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import sqlite3
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import sys
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import time
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from datetime import datetime, timezone
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from pathlib import Path
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import feedparser
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import requests
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from icalendar import Calendar
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from pynostr.event import Event
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from pynostr.key import PrivateKey
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from pynostr.relay_manager import RelayManager
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try:
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import tomllib
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except ModuleNotFoundError:
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import tomli as tomllib
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SCRIPT_DIR = Path(__file__).resolve().parent
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CONFIG_PATH = SCRIPT_DIR / "config.toml"
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def load_config():
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with open(CONFIG_PATH, "rb") as f:
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return tomllib.load(f)
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def setup_logging(log_path: Path):
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logging.basicConfig(
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level=logging.INFO,
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format="%(asctime)s [%(levelname)s] %(message)s",
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handlers=[
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logging.FileHandler(log_path, encoding="utf-8"),
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logging.StreamHandler(sys.stdout),
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],
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)
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log = logging.getLogger("nostr-calendar")
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# ---------------------------------------------------------------------------
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# Feed fetching / parsing
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# ---------------------------------------------------------------------------
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def fetch_text(url: str) -> str:
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resp = requests.get(url, timeout=30, headers={"User-Agent": "nostr-calendar/1.0"})
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resp.raise_for_status()
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return resp.text
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def parse_ics(text: str) -> list[dict]:
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cal = Calendar.from_ical(text)
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return [dict(c) for c in cal.walk("VEVENT")]
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def parse_rss(text: str) -> dict:
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feed = feedparser.parse(text)
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by_url = {}
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for entry in feed.entries:
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link = entry.get("link", "")
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if not link:
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continue
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image = ""
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enclosures = entry.get("enclosures", [])
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if enclosures:
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image = enclosures[0].get("href", "")
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if not image:
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for l in entry.get("links", []):
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if l.get("rel") == "enclosure":
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image = l.get("href", "")
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break
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if not image:
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m = re.search(r'<img[^>]+src="([^"]+)"', entry.get("description", ""))
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if m:
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image = m.group(1)
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categories = [c.get("term", "") for c in entry.get("tags", []) if c.get("term")]
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by_url[link] = {
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"image": image,
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"categories": categories,
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"description": entry.get("description", ""),
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}
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return by_url
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# ---------------------------------------------------------------------------
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# ICS field helpers
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# ---------------------------------------------------------------------------
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def ics_str(component: dict, key: str) -> str:
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val = component.get(key)
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if val is None:
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return ""
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if hasattr(val, "to_ical"):
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try:
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raw = val.to_ical().decode("utf-8", errors="replace")
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except Exception:
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raw = str(val)
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else:
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raw = str(val)
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raw = (
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raw.replace("\\,", ",")
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.replace("\\;", ";")
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.replace("\\n", "\n")
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.replace("\\N", "\n")
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.replace("\\\\", "\\")
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)
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return raw.strip()
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def ics_dt(component: dict, key: str) -> int | None:
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val = component.get(key)
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if val is None:
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return None
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try:
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dt = val.dt
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if isinstance(dt, datetime):
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if dt.tzinfo is None:
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dt = dt.replace(tzinfo=timezone.utc)
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return int(dt.timestamp())
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return int(datetime(dt.year, dt.month, dt.day, tzinfo=timezone.utc).timestamp())
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except Exception as e:
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log.warning("Could not parse %s: %s", key, e)
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return None
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# ---------------------------------------------------------------------------
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# Content / tags
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# ---------------------------------------------------------------------------
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def normalize_tag(tag: str) -> str:
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tag = tag.strip().lower()
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tag = re.sub(r"\s+", "-", tag)
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tag = re.sub(r"[^\w\-]", "", tag)
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return tag.strip("-")
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def build_content(template: str, title: str, location: str, url: str) -> str:
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return template.format(title=title, location=location, url=url)
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def make_event_id(ics_url: str, uid: str) -> str:
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m = re.match(r"^(\d+)@", uid)
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if m:
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return m.group(1)
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return hashlib.sha256(uid.encode()).hexdigest()[:16]
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def day_timestamps(start: int, end: int | None) -> list[int]:
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days = [start // 86400]
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if end is not None:
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last = end // 86400
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if last > days[0]:
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days.extend(range(days[0] + 1, last + 1))
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return days
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# ---------------------------------------------------------------------------
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# Dedupe
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# ---------------------------------------------------------------------------
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def init_db(path: Path) -> sqlite3.Connection:
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conn = sqlite3.connect(path)
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conn.execute(
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"""
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CREATE TABLE IF NOT EXISTS published (
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d_tag TEXT PRIMARY KEY,
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content_hash TEXT NOT NULL,
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event_id TEXT,
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published_at INTEGER NOT NULL
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)
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"""
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)
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conn.commit()
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return conn
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def content_hash(*parts) -> str:
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h = hashlib.sha256()
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for p in parts:
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h.update(str(p).encode("utf-8"))
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h.update(b"\x00")
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return h.hexdigest()
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def already_published(conn, d_tag: str, chash: str) -> bool:
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row = conn.execute(
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"SELECT content_hash FROM published WHERE d_tag = ?", (d_tag,)
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).fetchone()
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return row is not None and row[0] == chash
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def record_published(conn, d_tag: str, chash: str, event_id: str):
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conn.execute(
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"INSERT OR REPLACE INTO published (d_tag, content_hash, event_id, published_at) VALUES (?, ?, ?, ?)",
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(d_tag, chash, event_id, int(time.time())),
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)
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conn.commit()
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# ---------------------------------------------------------------------------
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# Event construction
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# ---------------------------------------------------------------------------
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def make_calendar_event(cfg: dict, pubkey_hex: str, event_d_tags: list[str]) -> Event:
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"""Build the kind 31924 calendar, listing every event via an `a` tag."""
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cal = cfg["calendar"]
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tags = [
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["d", cal["d"]],
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["title", cal["title"]],
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]
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for d_tag in event_d_tags:
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tags.append(["a", f"31923:{pubkey_hex}:{d_tag}"])
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return Event(
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kind=31924,
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content=cal["description"],
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tags=tags,
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)
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def make_calendar_event_nostr(cfg, pubkey_hex, title, start, end, location, url,
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image, tags, d_tag, duration, template) -> Event:
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"""Build a kind 31923 event."""
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cal_coord = f"31924:{pubkey_hex}:{cfg['calendar']['d']}"
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final_end = end if end is not None else start + duration
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ev_tags = [
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["d", d_tag],
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["title", title],
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["start", str(start)],
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["end", str(final_end)],
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["a", cal_coord],
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]
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if location:
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ev_tags.append(["location", location])
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if image:
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ev_tags.append(["image", image])
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for t in tags:
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ev_tags.append(["t", t])
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for day in day_timestamps(start, final_end):
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ev_tags.append(["D", str(day)])
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return Event(
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kind=31923,
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content=build_content(template, title, location, url),
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tags=ev_tags,
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)
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# ---------------------------------------------------------------------------
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# Relay filtering
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# ---------------------------------------------------------------------------
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def filter_relays_without_auth(relays: list[str], timeout: float = 8.0) -> list[str]:
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"""Probe each relay for an AUTH challenge on connect.
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Returns the list of relays that did NOT send AUTH within the timeout.
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Relays that sent AUTH are logged and excluded.
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"""
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accepted = []
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for url in relays:
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rm = RelayManager(timeout=timeout)
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rm.add_relay(url)
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log.info("Probing %s for AUTH requirement …", url)
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# Give the relay a moment to connect and (maybe) send AUTH.
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deadline = time.time() + timeout
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saw_auth = False
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while time.time() < deadline:
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relay = rm.relays.get(url)
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if relay is None:
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break
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pool = getattr(relay, "message_pool", None)
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queue = getattr(pool, "queue", None) if pool else None
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if queue:
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while queue:
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msg = queue.pop(0)
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if isinstance(msg, list) and len(msg) >= 1 and msg[0] == "AUTH":
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log.info("Relay %s requires AUTH — skipping.", url)
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saw_auth = True
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break
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if saw_auth:
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break
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time.sleep(0.25)
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try:
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rm.close_all_relay_connections()
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except Exception:
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pass
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if not saw_auth:
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log.info("Relay %s does not require AUTH — will publish.", url)
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accepted.append(url)
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time.sleep(0.5)
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return accepted
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# ---------------------------------------------------------------------------
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# Main
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# ---------------------------------------------------------------------------
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def main():
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dry_run = "--dry-run" in sys.argv
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cfg = load_config()
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setup_logging(SCRIPT_DIR / cfg.get("log_path", "publish.log"))
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if dry_run:
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log.info("=== DRY RUN — no DB writes, no relay publishing ===")
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secret = cfg["secret_key"]
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relays = cfg["relays"]
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ics_url = cfg["ics_url"]
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rss_url = cfg["rss_url"]
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duration = int(cfg.get("default_duration", 3600))
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template = cfg.get("content_template", "{title}\n📍 {location}\n🔗 {url}")
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rss_only = bool(cfg.get("rss_only", False))
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pk = PrivateKey.from_nsec(secret) if secret.startswith("nsec") else PrivateKey(bytes.fromhex(secret))
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pubkey_hex = pk.public_key.hex()
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log.info("Using pubkey %s", pubkey_hex)
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log.info("Configured relays: %s", ", ".join(relays))
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log.info("rss_only=%s", rss_only)
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log.info("Fetching ICS …")
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ics_text = fetch_text(ics_url)
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log.info("Fetching RSS …")
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rss_text = fetch_text(rss_url)
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log.info("Parsing ICS …")
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vevents = parse_ics(ics_text)
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log.info("Parsing RSS …")
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rss_map = parse_rss(rss_text)
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log.info("Found %d ICS events, %d RSS entries", len(vevents), len(rss_map))
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conn = init_db(SCRIPT_DIR / cfg.get("db_path", "events.db"))
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to_publish = []
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skipped = 0
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skipped_no_rss = 0
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dry_run_count = 0
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for vev in vevents:
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uid = ics_str(vev, "UID")
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if not uid:
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continue
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title = ics_str(vev, "SUMMARY")
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url = ics_str(vev, "URL")
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location = ics_str(vev, "LOCATION")
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start = ics_dt(vev, "DTSTART")
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end = ics_dt(vev, "DTEND")
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categories_ics = ics_str(vev, "CATEGORIES")
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if start is None:
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log.warning("Skipping %s — no DTSTART", uid)
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continue
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rss = rss_map.get(url, {})
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if rss_only and not rss:
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skipped_no_rss += 1
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continue
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image = rss.get("image", "")
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rss_cats = rss.get("categories", [])
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if categories_ics:
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raw_tags = [c.strip() for c in categories_ics.split(",") if c.strip()]
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else:
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raw_tags = rss_cats
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tags = [normalize_tag(t) for t in raw_tags if normalize_tag(t)]
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d_tag = make_event_id(ics_url, uid)
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chash = content_hash(title, start, end, location, url, image, ",".join(tags))
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if dry_run:
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log.info("DRY RUN %s: title=%r image=%r tags=%r start=%d end=%s",
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d_tag, title, image, tags, start, end)
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dry_run_count += 1
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continue
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if already_published(conn, d_tag, chash):
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skipped += 1
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continue
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ev = make_calendar_event_nostr(
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cfg, pubkey_hex, title, start, end, location, url,
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image, tags, d_tag, duration, template,
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)
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to_publish.append((d_tag, chash, ev))
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if dry_run:
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log.info("DRY RUN complete. Would publish %d, skipped_no_rss=%d",
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dry_run_count, skipped_no_rss)
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return
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log.info("Publishing %d new/changed events (skipped %d unchanged, %d without RSS)",
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len(to_publish), skipped, skipped_no_rss)
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# --- Filter relays: skip any that require AUTH ------------------------
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accepted_relays = filter_relays_without_auth(relays)
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if not accepted_relays:
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log.error("No relays accept publishing without AUTH. Aborting.")
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return
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log.info("Publishing to: %s", ", ".join(accepted_relays))
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# Build the full set of d-tags the calendar should reference:
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# everything already in the DB, plus everything about to be published.
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rows = conn.execute("SELECT d_tag FROM published").fetchall()
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all_d_tags = {row[0] for row in rows}
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for d_tag, _, _ in to_publish:
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all_d_tags.add(d_tag)
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all_d_tags = sorted(all_d_tags)
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log.info("Calendar will reference %d events", len(all_d_tags))
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cal_ev = make_calendar_event(cfg, pubkey_hex, all_d_tags)
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cal_ev.sign(pk.hex())
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# --- Publish ----------------------------------------------------------
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relay_manager = RelayManager(timeout=5)
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for r in accepted_relays:
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relay_manager.add_relay(r)
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relay_manager.publish_event(cal_ev)
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log.info("Queued calendar kind 31924 (d=%s) referencing %d events",
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cfg["calendar"]["d"], len(all_d_tags))
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for d_tag, chash, ev in to_publish:
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ev.sign(pk.hex())
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relay_manager.publish_event(ev)
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log.info("Queued event %s — %s", d_tag, ev.content.split("\n", 1)[0])
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relay_manager.run_sync()
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time.sleep(2)
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relay_manager.close_all_relay_connections()
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for d_tag, chash, ev in to_publish:
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record_published(conn, d_tag, chash, ev.id)
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log.info("Done. %d events published, calendar references %d.",
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len(to_publish), len(all_d_tags))
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if __name__ == "__main__":
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main() |