147 lines
5.1 KiB
Python
147 lines
5.1 KiB
Python
"""Sync service for VoIdea.
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Handles pull/push sync of user data across devices.
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Change tracking via updated_at timestamps.
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"""
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from datetime import datetime, timezone
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from typing import Any
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from uuid import UUID, uuid4
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from sqlalchemy import select
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from sqlalchemy.ext.asyncio import AsyncSession
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from app.models.idea import Idea
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from app.models.user import User
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class SyncService:
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def __init__(self, db: AsyncSession):
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self.db = db
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async def pull(self, user: User, last_sync: datetime | None = None) -> dict:
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"""Pull changes since last_sync.
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Args:
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user: Authenticated user
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last_sync: Last sync timestamp (None = full sync)
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Returns:
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Dict with changes list and sync_token
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"""
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query = select(Idea).where(Idea.user_id == user.id)
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if last_sync:
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query = query.where(Idea.updated_at > last_sync)
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result = await self.db.execute(query)
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ideas = result.scalars().all()
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changes = [
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{
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"entity": "idea",
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"action": "update",
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"id": str(idea.id),
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"data": {
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"title": idea.title,
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"content": idea.content,
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"status": idea.status,
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"updated_at": idea.updated_at.isoformat() if idea.updated_at else None,
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},
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}
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for idea in ideas
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]
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return {
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"status": "ok",
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"changes": changes,
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"sync_token": datetime.now(timezone.utc).isoformat(),
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}
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async def push(self, user: User, device_id: str, changes: list[dict[str, Any]]) -> dict:
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"""Push changes from device.
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Args:
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user: Authenticated user
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device_id: Source device identifier
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changes: List of change dicts
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Returns:
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Dict with applied changes and conflicts
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"""
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applied = []
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conflicts = []
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for change in changes:
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entity = change.get("entity", "idea")
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action = change.get("action", "update")
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change_id = change.get("id")
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if entity != "idea":
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applied.append({"id": change_id, "status": "skipped", "reason": "unsupported_entity"})
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continue
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data = change.get("data", {})
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if action == "delete" and change_id:
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query = select(Idea).where(Idea.id == UUID(change_id), Idea.user_id == user.id)
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result = await self.db.execute(query)
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idea = result.scalar_one_or_none()
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if idea:
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await self.db.delete(idea)
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applied.append({"id": change_id, "status": "deleted"})
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else:
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applied.append({"id": change_id, "status": "not_found"})
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continue
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if change_id:
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query = select(Idea).where(Idea.id == UUID(change_id), Idea.user_id == user.id)
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result = await self.db.execute(query)
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existing = result.scalar_one_or_none()
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if existing:
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incoming_ts = data.get("updated_at")
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if incoming_ts and existing.updated_at:
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incoming_dt = datetime.fromisoformat(incoming_ts)
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if existing.updated_at.replace(tzinfo=timezone.utc) > incoming_dt.replace(tzinfo=timezone.utc):
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conflicts.append({
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"id": change_id,
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"server_version": existing.updated_at.isoformat(),
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"client_version": incoming_ts,
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"message": "Server has newer version",
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})
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continue
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for key, value in data.items():
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if key != "updated_at" and hasattr(existing, key):
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setattr(existing, key, value)
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applied.append({"id": change_id, "status": "updated"})
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else:
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new_idea = Idea(
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id=UUID(change_id) if change_id else uuid4(),
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user_id=user.id,
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title=data.get("title", ""),
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content=data.get("content", ""),
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status=data.get("status", "draft"),
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)
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self.db.add(new_idea)
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applied.append({"id": change_id or str(new_idea.id), "status": "created"})
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else:
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new_idea = Idea(
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user_id=user.id,
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title=data.get("title", ""),
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content=data.get("content", ""),
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status=data.get("status", "draft"),
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)
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self.db.add(new_idea)
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applied.append({"id": str(new_idea.id), "status": "created"})
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await self.db.commit()
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return {
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"status": "ok",
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"changes": applied,
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"conflicts": conflicts,
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"sync_token": datetime.now(timezone.utc).isoformat(),
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}
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