220 lines
9.3 KiB
Python
220 lines
9.3 KiB
Python
from __future__ import annotations
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import asyncio
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from typing import Any
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from fastapi import FastAPI, File, HTTPException, UploadFile
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from fastapi.responses import JSONResponse, StreamingResponse
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from app.models.contracts import ChatRequest, ConversationPatch
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from app.services.agent_service import AgentService
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from app.services.library import CdslLibrary
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from app.services.storage import WorkspaceStore, safe_conversation_id, safe_task_id
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from app.services.attachments import attachment_record, classify_upload, extract_document_text
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from app.services.image_processing import image_metadata
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from app.services.review_renderer import renderer_status
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from app.settings import get_settings
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settings = get_settings()
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store = WorkspaceStore(settings)
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library = CdslLibrary(settings)
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agent = AgentService(settings, store, library)
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app = FastAPI(title="CDSL CAD Agent API", version="0.1.0")
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@app.on_event("startup")
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async def resume_autonomous_generation() -> None:
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"""Restore durable autonomous agent tasks after a backend process restart."""
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if settings.resume_running_tasks_on_startup:
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await agent.resume_running_tasks()
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@app.get("/health")
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async def health() -> dict[str, Any]:
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return {
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"ok": True,
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"service": "cdsl-cad-backend",
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"llm_configured": settings.llm_configured,
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"library_index": (settings.library_root / "index" / "catalog.json").is_file(),
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}
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@app.get("/v1/config")
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async def config() -> dict[str, Any]:
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providers = []
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for provider in settings.providers:
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if not provider.configured:
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continue
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providers.append({
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"id": provider.id,
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"label": provider.label,
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"models": [
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{
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"id": model.id,
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"vision": model.vision,
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}
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for model in provider.models
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],
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})
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try:
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settings.resolve_review_model()
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renderer_ready, renderer_detail = renderer_status()
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review_error = "" if renderer_ready else renderer_detail
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except ValueError as error:
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review_error = str(error)
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return {
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"default_provider": settings.default_provider_id,
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"default_model": settings.llm_model,
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"providers": providers,
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"model": settings.llm_model,
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"configured": settings.llm_configured,
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"library_samples": library.count(),
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"autonomous_generation": settings.autonomous_generation,
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"review_configured": not review_error,
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"review_error": review_error,
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}
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@app.post("/v1/chat/stream")
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async def chat_stream(payload: ChatRequest) -> StreamingResponse:
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return StreamingResponse(
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agent.stream(payload.messages, payload.conversation_id, payload.selected_task_id, payload.provider_id, payload.model_id, payload.viewer_context),
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media_type="text/event-stream",
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headers={"Cache-Control": "no-cache", "X-Accel-Buffering": "no"},
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)
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@app.get("/v1/conversations/{conversation_id}")
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async def read_conversation(conversation_id: str) -> JSONResponse:
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try:
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record = store.read_conversation(safe_conversation_id(conversation_id))
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except ValueError as error:
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raise HTTPException(status_code=400, detail=str(error)) from error
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if record is None:
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raise HTTPException(status_code=404, detail="Conversation not found")
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return JSONResponse(record)
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@app.post("/v1/conversations")
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async def create_conversation() -> JSONResponse:
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return JSONResponse(store.ensure_conversation(None))
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@app.patch("/v1/conversations/{conversation_id}")
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async def patch_conversation(conversation_id: str, payload: ConversationPatch) -> JSONResponse:
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try:
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record = store.ensure_conversation(safe_conversation_id(conversation_id), payload.current_task_id)
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except ValueError as error:
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raise HTTPException(status_code=400, detail=str(error)) from error
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return JSONResponse(record)
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@app.post("/v1/conversations/{conversation_id}/attachments")
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async def upload_conversation_attachment(
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conversation_id: str,
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file: UploadFile = File(...),
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) -> JSONResponse:
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data = await file.read()
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filename = file.filename or "attachment"
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try:
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conversation = safe_conversation_id(conversation_id)
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current = store.read_conversation(conversation)
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if current is None:
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raise HTTPException(status_code=404, detail="Conversation not found")
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active_task_id = str(current.get("current_task_id") or "")
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active_task = store.read_task(active_task_id) if active_task_id else None
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if str((active_task or {}).get("lifecycle") or "") == "running":
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raise HTTPException(status_code=409, detail="CAD task is running; attachments are locked until it reaches a terminal state")
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kind = classify_upload(filename, file.content_type or "", len(data))
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relative_path, _ = store.write_conversation_upload(conversation, filename, data)
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extracted_path = ""
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if kind == "document":
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extracted_path = relative_path + ".txt"
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extracted = extract_document_text(data)
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store.conversation_attachment_path(conversation, extracted_path).write_text(extracted, encoding="utf-8")
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metadata = image_metadata(data) if kind == "image" else {}
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record = attachment_record(conversation, filename, file.content_type or "", relative_path, data, kind, extracted_path, metadata)
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store.add_conversation_attachment(conversation, record)
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return JSONResponse(record)
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except ValueError as error:
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raise HTTPException(status_code=400, detail=str(error)) from error
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@app.get("/v1/tasks/{task_id}")
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async def read_task(task_id: str) -> JSONResponse:
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try:
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task = store.read_task(safe_task_id(task_id))
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except ValueError as error:
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raise HTTPException(status_code=400, detail=str(error)) from error
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if task is None:
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raise HTTPException(status_code=404, detail="Task not found")
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# Keep the task endpoint self-contained for a reconnecting UI. Requirements
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# are immutable during a run; the active revision remains preview-only.
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task["preview_revision"] = str(task.get("active_revision") or task.get("current_revision") or "")
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requirements = store.read_requirements_document(task["task_id"])
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task["requirements_markdown"] = requirements or None
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completion_checklist = store.read_completion_checklist(task["task_id"])
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task["completion_checklist_markdown"] = completion_checklist or None
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modeling_plan = store.read_modeling_plan(task["task_id"])
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task["modeling_plan_markdown"] = modeling_plan or None
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task["modeling_plan_review"] = store.read_modeling_plan_review(task["task_id"])
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task["agent_state"] = store.read_agent_state(task["task_id"])
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return JSONResponse(task)
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@app.delete("/v1/tasks/{task_id}")
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async def cancel_task(task_id: str) -> JSONResponse:
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try:
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safe_id = safe_task_id(task_id)
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task = await agent.cancel(safe_id)
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except ValueError as error:
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raise HTTPException(status_code=400, detail=str(error)) from error
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if task is None:
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raise HTTPException(status_code=404, detail="Task not found")
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return JSONResponse(task)
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@app.get("/v1/tasks/{task_id}/artifacts/{artifact_path:path}")
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async def read_artifact(task_id: str, artifact_path: str) -> StreamingResponse:
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from fastapi.responses import FileResponse
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try:
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safe_id = safe_task_id(task_id)
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path = store.artifact_path(safe_id, artifact_path)
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except ValueError as error:
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raise HTTPException(status_code=400, detail=str(error)) from error
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if not path.is_file():
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raise HTTPException(status_code=404, detail="Artifact not found")
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task = store.read_task(safe_id) or {}
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parts = artifact_path.split("/")
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revision_id = parts[1] if len(parts) >= 3 and parts[0] == "revisions" else ""
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revision = next((item for item in task.get("revisions") or () if isinstance(item, dict) and item.get("revision_id") == revision_id), None)
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published_revision = str(task.get("published_revision") or "")
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active_revision = str(task.get("active_revision") or task.get("current_revision") or "")
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if not isinstance(revision, dict):
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# The task directory also contains candidate staging, agent audit and
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# frozen-input files. None of those are a public artifact surface.
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raise HTTPException(status_code=403, detail="This task artifact is not public")
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if revision_id == published_revision:
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published_paths = {
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str(revision.get("cdsl_path") or ""),
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str(revision.get("step_path") or ""),
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str(revision.get("glb_path") or ""),
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str(revision.get("report_path") or ""),
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}
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if artifact_path not in published_paths:
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raise HTTPException(status_code=403, detail="Only final delivery artifacts are downloadable")
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return FileResponse(path, filename=path.name)
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# A running task may render its current checkpoint in the browser, but
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# cannot expose any other checkpoint artifact or a failed-task preview.
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if (
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str(task.get("lifecycle") or "") != "running"
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or revision_id != active_revision
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or artifact_path != str(revision.get("glb_path") or "")
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):
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raise HTTPException(status_code=403, detail="Only the published revision is downloadable")
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return FileResponse(path, media_type="model/gltf-binary", headers={"Content-Disposition": "inline"})
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