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NotesAgentic/backend/app/export/document.py
T
yxx 5c2441464d feat(export): 交付 Markdown → HTML 导出服务
实现 Export Service 完整生命周期:mistune AST → Document AST → HtmlExporter 渲染完整 HTML5,异步任务注册表 + 取消 + 24h 产物过期。新增 5 个 /api/exports 端点与 15 项测试;pdf/docx 与函数图像静态渲染留待后续 PR。
2026-09-04 09:02:33 +08:00

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"""Document AST:导出器的内部中间表示(Internal Protocol,不放入 contracts.py)。
契约 §10.3 规定节点用稳定判别字段 node_id / type / attributes / children / text
类型专有信息统一放 attributes(如 heading 的 level、link 的 href、image 的 src)。
导出器据此递归渲染,对无法表示的节点记 warning,不静默丢弃。
"""
from __future__ import annotations
from typing import Any, Protocol
from pydantic import BaseModel, ConfigDict, Field
from app.contracts import ExportOptions
class DocumentNode(BaseModel):
"""递归文档节点;type 取契约 §10.3 首批 node type 之一。"""
model_config = ConfigDict(extra="forbid")
type: str
node_id: str
attributes: dict[str, Any] = Field(default_factory=dict)
children: list["DocumentNode"] = Field(default_factory=list)
text: str = ""
class Document(DocumentNode):
"""根节点,type 固定为 document。"""
type: str = "document"
class DocumentExporter(Protocol):
"""导出器协议(契约 §10.3):把 Document AST 渲染为指定格式的产物。"""
async def export(self, document: Document, options: ExportOptions) -> "ExportResult": ...
class ExportResult(BaseModel):
model_config = ConfigDict(extra="forbid")
content: bytes
mime_type: str
warnings: list[str] = Field(default_factory=list)