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Chris
205
backend/app/application/admin/releases.py
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205
backend/app/application/admin/releases.py
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from __future__ import annotations
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from dataclasses import asdict
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from typing import Any
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from app.domain.editor import VariantChange
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from app.domain.editor_builder import build_runtime_payload_from_changes
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from app.domain.mappers import to_release
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from app.repositories.directus.releases import ReleaseRepository
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from app.repositories.directus.variant_changes import VariantChangeRepository
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from app.repositories.directus.variants import VariantRepository
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from app.schemas.admin import BuildReleaseRequest, ReleaseLifecycleResponse, ReleaseRead, release_to_read_model
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class ReleaseService:
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"""Application service for release and snapshot lifecycle."""
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def __init__(
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self,
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repository: ReleaseRepository | None = None,
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variant_repository: VariantRepository | None = None,
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change_repository: VariantChangeRepository | None = None,
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) -> None:
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self.repository = repository or ReleaseRepository()
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self.variant_repository = variant_repository or VariantRepository()
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self.change_repository = change_repository or VariantChangeRepository()
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async def list_releases(
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self,
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experiment_id: str | None = None,
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access_token: str | None = None,
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) -> list[ReleaseRead]:
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params: dict[str, Any] | None = None
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if experiment_id:
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params = {"filter[experiment_id][_eq]": experiment_id}
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items = await self.repository.list(params=params, access_token=access_token)
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return [release_to_read_model(to_release(item)) for item in items]
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async def get_release(
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self,
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release_id: str,
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access_token: str | None = None,
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) -> ReleaseRead | None:
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item = await self.repository.get(release_id, access_token=access_token)
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if not item:
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return None
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return release_to_read_model(to_release(item))
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async def build_release(
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self,
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payload: BuildReleaseRequest,
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access_token: str | None = None,
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) -> ReleaseRead:
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experiment_id = payload.experiment_id
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# Fetch all variants for the experiment
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variant_items = await self.variant_repository.list(
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params={"filter[experiment_id][_eq]": experiment_id},
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access_token=access_token,
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)
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# Build per-variant runtime payloads
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variants_payload: list[dict[str, Any]] = []
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for variant_item in variant_items:
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variant_id = str(variant_item["id"])
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change_items = await self.change_repository.list(
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params={"filter[variant_id][_eq]": variant_id},
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access_token=access_token,
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)
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changes = [
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VariantChange(
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id=str(c["id"]),
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variant_id=variant_id,
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change_type=str(c.get("change_type", "")),
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selector_type=str(c.get("selector_type", "")),
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selector_value=str(c.get("selector_value", "")),
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sort_order=int(c.get("sort_order", 0)),
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payload=c.get("payload"),
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)
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for c in change_items
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]
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runtime_payload = build_runtime_payload_from_changes(variant_id, changes)
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variants_payload.append({
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"variant_id": variant_id,
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"variant_key": str(variant_item.get("variant_key", "")),
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"traffic_weight": int(variant_item.get("traffic_weight", 0)),
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"operations": [asdict(op) for op in runtime_payload.operations],
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})
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# Determine next version_no
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existing = await self.repository.list(
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params={"filter[experiment_id][_eq]": experiment_id, "sort": "-version_no", "limit": "1"},
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access_token=access_token,
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)
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next_version = (int(existing[0]["version_no"]) + 1) if existing else 1
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new_release = await self.repository.create(
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{
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"experiment_id": experiment_id,
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"version_no": next_version,
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"status": "draft",
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"runtime_payload": {"variants": variants_payload},
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},
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access_token=access_token,
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)
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return release_to_read_model(to_release(new_release))
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async def publish_release(
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self,
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release_id: str,
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access_token: str | None = None,
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) -> ReleaseLifecycleResponse | None:
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# Fetch the target release to get experiment_id
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target = await self.repository.get(release_id, access_token=access_token)
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if not target:
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return None
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experiment_id = str(target["experiment_id"])
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# Demote any currently published release in this experiment to draft
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currently_published = await self.repository.list(
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params={
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"filter[experiment_id][_eq]": experiment_id,
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"filter[status][_eq]": "published",
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},
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access_token=access_token,
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)
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for other in currently_published:
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if str(other["id"]) != release_id:
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await self.repository.update(str(other["id"]), {"status": "draft"}, access_token=access_token)
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item = await self.repository.update(release_id, {"status": "published"}, access_token=access_token)
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if not item:
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return None
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return ReleaseLifecycleResponse(
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id=str(item["id"]),
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status=str(item["status"]),
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version_no=int(item["version_no"]),
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)
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async def rollback_release(
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self,
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release_id: str,
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access_token: str | None = None,
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) -> ReleaseLifecycleResponse | None:
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# Fetch the target release to get experiment_id and version_no
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target = await self.repository.get(release_id, access_token=access_token)
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if not target:
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return None
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experiment_id = str(target["experiment_id"])
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current_version_no = int(target["version_no"])
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# Demote the current release back to draft
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await self.repository.update(release_id, {"status": "draft"}, access_token=access_token)
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# Find the most recent draft release with an earlier version_no to restore
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previous_candidates = await self.repository.list(
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params={
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"filter[experiment_id][_eq]": experiment_id,
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"filter[status][_eq]": "draft",
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"filter[version_no][_lt]": str(current_version_no),
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"sort": "-version_no",
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"limit": "1",
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},
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access_token=access_token,
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)
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if previous_candidates:
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restored = await self.repository.update(
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str(previous_candidates[0]["id"]),
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{"status": "published"},
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access_token=access_token,
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)
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if restored:
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return ReleaseLifecycleResponse(
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id=str(restored["id"]),
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status=str(restored["status"]),
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version_no=int(restored["version_no"]),
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)
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# No previous release to restore — return the now-drafted current release
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updated = await self.repository.get(release_id, access_token=access_token)
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if not updated:
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return None
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return ReleaseLifecycleResponse(
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id=str(updated["id"]),
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status=str(updated["status"]),
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version_no=int(updated["version_no"]),
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)
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async def archive_release(
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self,
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release_id: str,
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access_token: str | None = None,
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) -> ReleaseLifecycleResponse | None:
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item = await self.repository.update(release_id, {"status": "archived"}, access_token=access_token)
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if not item:
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return None
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return ReleaseLifecycleResponse(
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id=str(item["id"]),
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status=str(item["status"]),
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version_no=int(item["version_no"]),
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)
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