Making OData Refresh a background process

app/templates/admin/imported_parts.html

@@ -29,11 +29,9 @@
     <button class="btn btn-primary"
             hx-post="/admin/imported-parts/refresh"
             hx-target="#imported-parts-section"
-            hx-swap="outerHTML"
-            hx-indicator="#refresh-indicator">
+            hx-swap="outerHTML">
       Refresh from OData
     </button>
-    <span id="refresh-indicator" class="htmx-indicator muted"> Loading…</span>
   </div>
 
   {% include "admin/_imported_parts_table.html" %}

app/web/admin.py

@@ -1366,6 +1366,19 @@ async def save_imported_part_config(
     return HTMLResponse("Configuration saved.", status_code=200)
 
 
+_IMPORTED_PARTS_REFRESH_TARGET_ID = "imported-parts-section"
+
+
+async def _imported_parts_table_ctx(
+    db: AsyncSession, *, sync_result: str | None = None, sync_error: str | None = None
+) -> dict:
+    return {
+        **await _default_imported_parts_table_ctx(db),
+        "sync_result": sync_result,
+        "sync_error": sync_error,
+    }
+
+
 @router.post("/imported-parts/refresh", response_class=HTMLResponse)
 async def refresh_imported_parts(
     request: Request,
@@ -1373,46 +1386,95 @@ async def refresh_imported_parts(
     actor: User = Depends(web_require("imported_parts:write")),
 ):
     config = await imported_part_config_crud.get(db)
-
-    async def _imported_table_ctx(sync_result=None, sync_error=None):
-        return {
-            **await _default_imported_parts_table_ctx(db),
-            "sync_result": sync_result,
-            "sync_error": sync_error,
-        }
-
     if not config or not config.odata_url:
         return templates.TemplateResponse(
             request,
             "admin/_imported_parts_table.html",
-            await _imported_table_ctx(sync_error="OData URL is not configured."),
-        )
-    try:
-        records = await odata_service.fetch(
-            config.odata_url, config.username, config.password
-        )
-        created, updated = await imported_part_crud.upsert_bulk(db, records)
-        await audit_crud.log(
-            db,
-            actor=actor,
-            action="update",
-            resource_type="ImportedPart",
-            resource_id=None,
-            description=f"OData sync: {created} created, {updated} updated ({len(records)} total records)",
-        )
-        return templates.TemplateResponse(
-            request,
-            "admin/_imported_parts_table.html",
-            await _imported_table_ctx(
-                sync_result=f"Sync complete: {created} created, {updated} updated."
+            await _imported_parts_table_ctx(
+                db, sync_error="OData URL is not configured."
             ),
         )
-    except Exception as exc:
+
+    actor_id = actor.id
+
+    async def _run(job_id: str) -> None:
+        async with AsyncSessionLocal() as db:
+            config = await imported_part_config_crud.get(db)
+            if not config or not config.odata_url:
+                await jobs.mark_error(job_id, "OData URL is not configured.")
+                return
+            try:
+                records = await odata_service.fetch(
+                    config.odata_url, config.username, config.password
+                )
+                created, updated = await imported_part_crud.upsert_bulk(db, records)
+            except Exception as exc:
+                await jobs.mark_error(job_id, f"Sync failed: {exc}")
+                return
+            actor_row = await user_crud.get(db, actor_id)
+            await audit_crud.log(
+                db,
+                actor=actor_row,
+                action="update",
+                resource_type="ImportedPart",
+                resource_id=None,
+                description=(
+                    f"OData sync: {created} created, {updated} updated "
+                    f"({len(records)} total records)"
+                ),
+            )
+            await jobs.mark_done(
+                job_id,
+                message=f"Sync complete: {created} created, {updated} updated.",
+            )
+
+    job = await jobs.start("imported_parts_refresh", _run)
+    return templates.TemplateResponse(
+        request,
+        "admin/_job_progress.html",
+        {
+            "container_id": _IMPORTED_PARTS_REFRESH_TARGET_ID,
+            "poll_url": f"/admin/imported-parts/refresh/jobs/{job.id}",
+            "job": job,
+        },
+    )
+
+
+@router.get("/imported-parts/refresh/jobs/{job_id}", response_class=HTMLResponse)
+async def imported_parts_refresh_job_status(
+    request: Request,
+    job_id: str,
+    db: AsyncSession = Depends(get_db),
+    _: User = Depends(web_require("imported_parts:write")),
+):
+    job = await jobs.get(db, job_id)
+    if job is None:
         return templates.TemplateResponse(
             request,
             "admin/_imported_parts_table.html",
-            await _imported_table_ctx(sync_error=f"Sync failed: {exc}"),
+            await _imported_parts_table_ctx(
+                db, sync_error="Refresh job not found — it may have expired."
+            ),
         )
+    if job.status == "running":
+        return templates.TemplateResponse(
+            request,
+            "admin/_job_progress.html",
+            {
+                "container_id": _IMPORTED_PARTS_REFRESH_TARGET_ID,
+                "poll_url": f"/admin/imported-parts/refresh/jobs/{job_id}",
+                "job": job,
+            },
+        )
+    return templates.TemplateResponse(
+        request,
+        "admin/_imported_parts_table.html",
+        await _imported_parts_table_ctx(
+            db,
+            sync_result=job.message if job.status == "done" else None,
+            sync_error=job.message if job.status == "error" else None,
+        ),
+    )
 
 
 @router.get("/imported-parts/filter", response_class=HTMLResponse)