70b1c7de10
Add typed service contracts (Protocols + frozen DTOs) in shared/contracts/ for cross-domain communication. Each domain exposes a service interface (BlogService, CalendarService, MarketService, CartService) backed by SQL implementations in shared/services/. A singleton registry with has() guards enables composable startup — apps register their own domain service and stubs for absent domains. Absorbs glue layer: navigation, relationships, event handlers (login, container, order) now live in shared/ with has()-guarded service calls. Factory gains domain_services_fn parameter for per-app service registration. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
66 lines
2.5 KiB
Python
66 lines
2.5 KiB
Python
"""SQL-backed BlogService implementation.
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Queries ``shared.models.ghost_content.Post`` — only this module may read
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blog-domain tables on behalf of other domains.
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"""
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from __future__ import annotations
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from sqlalchemy import select, func
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from sqlalchemy.ext.asyncio import AsyncSession
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from shared.models.ghost_content import Post
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from shared.contracts.dtos import PostDTO
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def _post_to_dto(post: Post) -> PostDTO:
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return PostDTO(
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id=post.id,
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slug=post.slug,
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title=post.title,
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status=post.status,
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visibility=post.visibility,
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is_page=post.is_page,
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feature_image=post.feature_image,
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html=post.html,
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excerpt=post.excerpt,
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custom_excerpt=post.custom_excerpt,
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published_at=post.published_at,
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)
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class SqlBlogService:
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async def get_post_by_slug(self, session: AsyncSession, slug: str) -> PostDTO | None:
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post = (
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await session.execute(select(Post).where(Post.slug == slug))
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).scalar_one_or_none()
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return _post_to_dto(post) if post else None
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async def get_post_by_id(self, session: AsyncSession, id: int) -> PostDTO | None:
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post = (
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await session.execute(select(Post).where(Post.id == id))
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).scalar_one_or_none()
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return _post_to_dto(post) if post else None
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async def get_posts_by_ids(self, session: AsyncSession, ids: list[int]) -> list[PostDTO]:
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if not ids:
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return []
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result = await session.execute(select(Post).where(Post.id.in_(ids)))
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return [_post_to_dto(p) for p in result.scalars().all()]
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async def search_posts(
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self, session: AsyncSession, query: str, page: int = 1, per_page: int = 10,
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) -> tuple[list[PostDTO], int]:
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"""Search posts by title with pagination. Not part of the Protocol
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(admin-only use in events), but provided for convenience."""
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if query:
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count_stmt = select(func.count(Post.id)).where(Post.title.ilike(f"%{query}%"))
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posts_stmt = select(Post).where(Post.title.ilike(f"%{query}%")).order_by(Post.title)
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else:
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count_stmt = select(func.count(Post.id))
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posts_stmt = select(Post).order_by(Post.published_at.desc().nullslast())
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total = (await session.execute(count_stmt)).scalar() or 0
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offset = (page - 1) * per_page
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result = await session.execute(posts_stmt.limit(per_page).offset(offset))
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return [_post_to_dto(p) for p in result.scalars().all()], total
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