initial

backend/app/api/presets.py

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+"""Preset routes: list / get / create."""
+from __future__ import annotations
+
+from typing import List
+from uuid import UUID
+
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from fastapi import APIRouter, Depends, HTTPException
+
+from app.db import get_db_dep
+from app.deps import get_current_user
+from app.models import Preset, User
+from app.schemas import PresetCreate, PresetOut
+
+router = APIRouter(prefix="/api/presets", tags=["presets"])
+
+
+@router.get("", response_model=List[PresetOut])
+async def list_presets(
+    language: str | None = None,
+    db: AsyncSession = Depends(get_db_dep),
+    user: User = Depends(get_current_user),
+):
+    """List public presets + user's private ones, optionally filtered by language."""
+    q = select(Preset).where(
+        (Preset.is_public.is_(True)) | (Preset.author_id == user.id)
+    )
+    if language:
+        q = q.where(Preset.language == language)
+    q = q.order_by(Preset.is_builtin.desc(), Preset.created_at.desc())
+    result = await db.execute(q)
+    return result.scalars().all()
+
+
+@router.get("/{preset_id}", response_model=PresetOut)
+async def get_preset(
+    preset_id: UUID,
+    db: AsyncSession = Depends(get_db_dep),
+    _: User = Depends(get_current_user),
+):
+    result = await db.execute(select(Preset).where(Preset.id == preset_id))
+    preset = result.scalars().first()
+    if not preset:
+        raise HTTPException(status_code=404, detail="preset_not_found")
+    if not preset.is_public and preset.author_id != _.id:
+        raise HTTPException(status_code=403, detail="forbidden")
+    return preset
+
+
+@router.post("", response_model=PresetOut, status_code=201)
+async def create_preset(
+    payload: PresetCreate,
+    db: AsyncSession = Depends(get_db_dep),
+    user: User = Depends(get_current_user),
+):
+    preset = Preset(
+        slug=payload.slug,
+        title=payload.title,
+        description=payload.description,
+        language=payload.language,
+        is_public=payload.is_public,
+        is_builtin=False,
+        payload=payload.payload,
+        author_id=user.id,
+    )
+    db.add(preset)
+    await db.commit()
+    await db.refresh(preset)
+    return preset