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

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- 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>
This commit is contained in:
giles
2026-02-24 21:44:11 +00:00
parent 4d7f8cfea2
commit b3d853ad35
15 changed files with 601 additions and 0 deletions
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49
events/bp/fragments/routes.py
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@@ -125,6 +125,55 @@ def register():
_handlers["account-page"] = _account_page_handler
# --- link-card fragment: event page preview card ----------------------------
async def _link_card_handler():
from shared.infrastructure.urls import events_url
slug = request.args.get("slug", "")
keys_raw = request.args.get("keys", "")
# Batch mode
if keys_raw:
slugs = [k.strip() for k in keys_raw.split(",") if k.strip()]
parts = []
for s in slugs:
parts.append(f"<!-- fragment:{s} -->")
post = await services.blog.get_post_by_slug(g.s, s)
if post:
calendars = await services.calendar.calendars_for_container(
g.s, "page", post.id,
)
cal_names = ", ".join(c.name for c in calendars) if calendars else ""
parts.append(await render_template(
"fragments/link_card.html",
title=post.title,
feature_image=post.feature_image,
calendar_names=cal_names,
link=events_url(f"/{post.slug}"),
))
return "\n".join(parts)
# Single mode
if not slug:
return ""
post = await services.blog.get_post_by_slug(g.s, slug)
if not post:
return ""
calendars = await services.calendar.calendars_for_container(
g.s, "page", post.id,
)
cal_names = ", ".join(c.name for c in calendars) if calendars else ""
return await render_template(
"fragments/link_card.html",
title=post.title,
feature_image=post.feature_image,
calendar_names=cal_names,
link=events_url(f"/{post.slug}"),
)
_handlers["link-card"] = _link_card_handler
bp._fragment_handlers = _handlers
return bp