activity-pub/app/routers/users.py

"""
User profile routes for L2 server.

Handles ActivityPub actor profiles.
"""

import logging

from fastapi import APIRouter, Request, HTTPException
from fastapi.responses import JSONResponse

from artdag_common import render
from artdag_common.middleware import wants_html

from ..config import settings
from ..dependencies import get_templates, get_user_from_cookie

router = APIRouter()
logger = logging.getLogger(__name__)


@router.get("/users/{username}")
async def get_user_profile(
    username: str,
    request: Request,
):
    """Get user profile (ActivityPub actor)."""
    import db

    user = await db.get_user(username)
    if not user:
        raise HTTPException(404, "User not found")

    # ActivityPub response
    accept = request.headers.get("accept", "")
    if "application/activity+json" in accept or "application/ld+json" in accept:
        actor = {
            "@context": [
                "https://www.w3.org/ns/activitystreams",
                "https://w3id.org/security/v1",
            ],
            "type": "Person",
            "id": f"https://{settings.domain}/users/{username}",
            "name": user.get("display_name", username),
            "preferredUsername": username,
            "inbox": f"https://{settings.domain}/users/{username}/inbox",
            "outbox": f"https://{settings.domain}/users/{username}/outbox",
            "publicKey": {
                "id": f"https://{settings.domain}/users/{username}#main-key",
                "owner": f"https://{settings.domain}/users/{username}",
                "publicKeyPem": user.get("public_key", ""),
            },
        }
        return JSONResponse(content=actor, media_type="application/activity+json")

    # HTML profile page
    current_user = get_user_from_cookie(request)
    assets = await db.get_user_assets(username, limit=12)

    templates = get_templates(request)
    return render(templates, "users/profile.html", request,
        profile=user,
        assets=assets,
        user={"username": current_user} if current_user else None,
    )


@router.get("/users/{username}/outbox")
async def get_outbox(
    username: str,
    request: Request,
    page: bool = False,
):
    """Get user's outbox (ActivityPub)."""
    import db

    user = await db.get_user(username)
    if not user:
        raise HTTPException(404, "User not found")

    actor_id = f"https://{settings.domain}/users/{username}"

    if not page:
        # Return collection summary
        total = await db.count_user_activities(username)
        return JSONResponse(
            content={
                "@context": "https://www.w3.org/ns/activitystreams",
                "type": "OrderedCollection",
                "id": f"{actor_id}/outbox",
                "totalItems": total,
                "first": f"{actor_id}/outbox?page=true",
            },
            media_type="application/activity+json",
        )

    # Return paginated activities
    activities = await db.get_user_activities(username, limit=20)
    items = [a.get("activity_json", a) for a in activities]

    return JSONResponse(
        content={
            "@context": "https://www.w3.org/ns/activitystreams",
            "type": "OrderedCollectionPage",
            "id": f"{actor_id}/outbox?page=true",
            "partOf": f"{actor_id}/outbox",
            "orderedItems": items,
        },
        media_type="application/activity+json",
    )


@router.post("/users/{username}/inbox")
async def receive_inbox(
    username: str,
    request: Request,
):
    """Receive ActivityPub inbox message."""
    import db

    user = await db.get_user(username)
    if not user:
        raise HTTPException(404, "User not found")

    # TODO: Verify HTTP signature
    # TODO: Process activity (Follow, Like, Announce, etc.)

    body = await request.json()
    logger.info(f"Received inbox activity for {username}: {body.get('type')}")

    # For now, just acknowledge
    return {"status": "accepted"}


@router.get("/")
async def home(request: Request):
    """Home page."""
    import db
    import markdown

    username = get_user_from_cookie(request)

    # Get recent activities
    activities = await db.get_activities(limit=10)

    # Get README if exists
    readme_html = ""
    try:
        from pathlib import Path
        readme_path = Path(__file__).parent.parent.parent / "README.md"
        if readme_path.exists():
            readme_html = markdown.markdown(readme_path.read_text())
    except Exception:
        pass

    templates = get_templates(request)
    return render(templates, "home.html", request,
        user={"username": username} if username else None,
        activities=activities,
        readme_html=readme_html,
    )