Add Phase 5: link-card fragments, oEmbed endpoints, OG meta

- fetch_fragment_batch() for N+1 avoidance with per-key Redis cache - link-card fragment handlers in blog, market, events, federation (single + batch mode) - link_card.html templates per app with content-specific previews - shared/infrastructure/oembed.py: build_oembed_response, build_og_meta, build_oembed_link_tag - GET /oembed routes on blog, market, events - og_meta + oembed_link rendering in base template <head> - INTERNAL_URL_ARTDAG in docker-compose.yml for cross-stack fragment fetches Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-02-24 21:44:11 +00:00
parent 4d7f8cfea2
commit b3d853ad35
15 changed files with 601 additions and 0 deletions
--- a/federation/bp/fragments/routes.py
+++ b/federation/bp/fragments/routes.py
@@ -29,6 +29,53 @@ def register():
        html = await handler()
        return Response(html, status=200, content_type="text/html")

+    # --- link-card fragment: actor profile preview card --------------------------
+
+    async def _link_card_handler():
+        from quart import g, render_template
+        from shared.services.registry import services
+        from shared.infrastructure.urls import federation_url
+
+        username = request.args.get("username", "")
+        slug = request.args.get("slug", "")
+        keys_raw = request.args.get("keys", "")
+
+        # Batch mode
+        if keys_raw:
+            usernames = [k.strip() for k in keys_raw.split(",") if k.strip()]
+            parts = []
+            for u in usernames:
+                parts.append(f"<!-- fragment:{u} -->")
+                actor = await services.federation.get_actor_by_username(g.s, u)
+                if actor:
+                    parts.append(await render_template(
+                        "fragments/link_card.html",
+                        display_name=actor.display_name,
+                        username=actor.preferred_username,
+                        avatar_url=None,
+                        summary=actor.summary,
+                        link=federation_url(f"/users/{actor.preferred_username}"),
+                    ))
+            return "\n".join(parts)
+
+        # Single mode
+        lookup = username or slug
+        if not lookup:
+            return ""
+        actor = await services.federation.get_actor_by_username(g.s, lookup)
+        if not actor:
+            return ""
+        return await render_template(
+            "fragments/link_card.html",
+            display_name=actor.display_name,
+            username=actor.preferred_username,
+            avatar_url=None,
+            summary=actor.summary,
+            link=federation_url(f"/users/{actor.preferred_username}"),
+        )
+
+    _handlers["link-card"] = _link_card_handler
+
    bp._fragment_handlers = _handlers

    return bp