feat: resolve shared My Work routes

src/gitea_proxy.py

@@ -22,6 +22,10 @@ class WorkItems(list[dict]):
         self.pagination = pagination
 
 
+class WorkRouteUnavailableError(ValueError):
+    """Raised when a shared route no longer belongs in the current user's queue."""
+
+
 class StaleReviewError(ValueError):
     """Raised before mutation when a pull request head changed during review."""
 
@@ -1040,6 +1044,57 @@ def _login_in_users(login: str, value: object) -> bool:
     )
 
 
+async def resolve_work_route(
+    kind: str,
+    repository: str | None,
+    number: int | None,
+    notification_id: int | None,
+) -> dict:
+    if kind == "update":
+        if notification_id is None:
+            raise WorkRouteUnavailableError("Notification identity is missing")
+        thread = await fetch(f"notifications/threads/{notification_id}")
+        if not isinstance(thread, dict) or thread.get("unread") is not True:
+            raise WorkRouteUnavailableError("Notification is no longer unread")
+        detail = await notification_detail(notification_id)
+        return {
+            "kind": "update",
+            "notification_id": notification_id,
+            "has_update": True,
+            "repository": detail.get("repository", ""),
+            "title": detail.get("title", ""),
+            "url": detail.get("url", ""),
+        }
+    if repository is None or number is None or kind not in {"issue", "pull", "review"}:
+        raise WorkRouteUnavailableError("Work identity is missing")
+
+    target_path = "issues" if kind == "issue" else "pulls"
+    login, target = await _current_login_and_target(
+        f"repos/{repository}/{target_path}/{number}"
+    )
+    assigned = _login_in_users(login, target.get("assignees"))
+    requested = _login_in_users(login, target.get("requested_reviewers"))
+    eligible = (
+        target.get("state") == "open"
+        and (
+            (kind == "issue" and not isinstance(target.get("pull_request"), dict) and assigned)
+            or (kind == "pull" and assigned)
+            or (kind == "review" and requested)
+        )
+    )
+    if not eligible:
+        raise WorkRouteUnavailableError("Work item is no longer in My Work")
+    return {
+        "kind": kind,
+        "repository": repository,
+        "number": number,
+        "title": target.get("title", "") if isinstance(target.get("title"), str) else "",
+        "state": "open",
+        "url": _safe_web_url(target.get("html_url")),
+        **({"is_review": True, "work_reasons": ["review_requested"]} if kind == "review" else {}),
+    }
+
+
 async def is_assigned_issue(repository: str, number: int) -> bool:
     login, issue = await _current_login_and_target(
         f"repos/{repository}/issues/{number}"

src/main.py

@@ -397,7 +397,7 @@ app.include_router(frontend_router)
 @app.middleware("http")
 async def prevent_live_api_caching(request, call_next):
     response = await call_next(request)
-    if request.url.path in {"/api/v1/context", "/api/v1/events", "/api/v1/live", "/api/v1/available-issues", "/api/v1/search"} or request.url.path.startswith("/api/v1/work/") or (
+    if request.url.path in {"/api/v1/context", "/api/v1/events", "/api/v1/live", "/api/v1/available-issues", "/api/v1/search", "/api/v1/work-route"} or request.url.path.startswith("/api/v1/work/") or (
         request.url.path.startswith("/api/v1/repos/")
         and request.url.path.endswith("/review")
     ) or request.url.path.startswith("/api/v1/notifications") or (
@@ -547,6 +547,33 @@ async def global_search_preview(
     return JSONResponse(preview)
 
 
+@app.get("/api/v1/work-route")
+async def resolve_work_route(
+    kind: Literal["issue", "pull", "review", "update"] = Query(),
+    repository: str | None = Query(default=None, pattern=r"^[A-Za-z0-9_.-]+/[A-Za-z0-9_.-]+$"),
+    number: int | None = Query(default=None, gt=0),
+    notification_id: int | None = Query(default=None, gt=0),
+) -> JSONResponse:
+    repository_route = repository is not None and number is not None and notification_id is None
+    update_route = kind == "update" and notification_id is not None and repository is None and number is None
+    if (kind == "update" and not update_route) or (kind != "update" and not repository_route):
+        raise HTTPException(status_code=422, detail="Invalid work route identity")
+    try:
+        result = await asyncio.wait_for(
+            gitea_proxy.resolve_work_route(kind, repository, number, notification_id),
+            timeout=WORK_PAGE_TIMEOUT_SECONDS,
+        )
+    except gitea_proxy.WorkRouteUnavailableError:
+        raise HTTPException(status_code=404, detail="Work item is no longer in My Work")
+    except Exception:
+        return JSONResponse(
+            {"error": "The shared work item is temporarily unavailable. Please retry."},
+            status_code=503,
+            headers={"Retry-After": "1"},
+        )
+    return JSONResponse(result)
+
+
 @app.get("/api/v1/work/{stream}")
 async def paged_work(
     stream: Literal["issue", "pull", "review"],