Post History

This code uses the What's in Standard API to fetch all Standard-legal sets, filters to those already released, finds the most recent, and updates a local timestamp to track the latest Standard set. It automates detecting when a new Standard set enters rotation.

```python
import requests
import json
import os
from datetime import datetime, timezone

LAST_UPDATED_FILE = "last_updated.json"
WIS_SETS_API = "https://whatsinstandard.com/api/v6/standard.json"


def fetch_sets_data():
    """Fetch data from What's in Standard API."""
    response = requests.get(WIS_SETS_API)
    response.raise_for_status()
    return response.json()["sets"]


def load_saved_updated_at(file_path=LAST_UPDATED_FILE):
    """Load previously saved updated_at from file."""
    if os.path.exists(file_path):
        with open(file_path, "r") as f:
            data = json.load(f)
            return data.get("updated_at")
    return None


def save_updated_at(updated_at, file_path=LAST_UPDATED_FILE):
    """Save updated_at to file."""
    with open(file_path, "w") as f:
        json.dump({"updated_at": updated_at}, f)


def check_for_update(latest_updated_at, saved_updated_at):
    """Return True if update detected, else False. Print 'updating' if True."""
    if saved_updated_at is None or latest_updated_at > saved_updated_at:
        save_updated_at(latest_updated_at)
        return True
    return False


def main():
    now = datetime.now(timezone.utc)
    sets = fetch_sets_data()

    # Filter to sets already released
    released_sets = [
        s
        for s in sets
        if s.get("enterDate", {}).get("exact")  # skip sets with null
        and datetime.fromisoformat(s["enterDate"]["exact"]).replace(tzinfo=timezone.utc)
        <= now
    ]

    if not released_sets:
        print("No sets released yet")
        return

    # Find the most recent released set
    latest_set = max(
        released_sets,
        key=lambda s: datetime.fromisoformat(s["enterDate"]["exact"]).replace(
            tzinfo=timezone.utc
        ),
    )

    latest_updated_at = latest_set["enterDate"]["exact"]
    saved_updated_at = load_saved_updated_at()

    if check_for_update(latest_updated_at, saved_updated_at):
        print(f"Updating to latest released set: {latest_set['name']}")


if __name__ == "__main__":
    main()

```