we do a little exporting

src/physcom_web/routes/admin.py

@@ -2,9 +2,13 @@
 
 from __future__ import annotations
 
-from flask import Blueprint, flash, redirect, render_template, url_for
+import json
+
+from flask import Blueprint, flash, redirect, render_template, request, url_for
+from flask import Response
 
 from physcom.seed.transport_example import load_transport_seed
+from physcom.snapshot import export_snapshot, import_snapshot
 from physcom_web.app import get_repo
 
 bp = Blueprint("admin", __name__, url_prefix="/admin")
@@ -38,14 +42,50 @@ def reseed():
     return redirect(url_for("admin.admin_index"))
 
 
-@bp.route("/wipe-and-reseed", methods=["POST"])
-def wipe_and_reseed():
+@bp.route("/wipe", methods=["POST"])
+def wipe():
     repo = get_repo()
     repo.clear_all()
-    counts = load_transport_seed(repo)
-    total = counts["platforms"] + counts["actuators"] + counts["energy_storages"]
+    flash("Wiped all data.", "success")
+    return redirect(url_for("admin.admin_index"))
+
+
+@bp.route("/snapshot/export")
+def snapshot_export():
+    repo = get_repo()
+    data = export_snapshot(repo)
+    body = json.dumps(data, indent=2)
+    return Response(
+        body,
+        mimetype="application/json",
+        headers={"Content-Disposition": "attachment; filename=physcom_snapshot.json"},
+    )
+
+
+@bp.route("/snapshot/import", methods=["POST"])
+def snapshot_import():
+    repo = get_repo()
+    clear = "clear" in request.form
+
+    file = request.files.get("file")
+    if not file or not file.filename:
+        flash("No file selected.", "error")
+        return redirect(url_for("admin.admin_index"))
+
+    try:
+        raw = file.read().decode("utf-8")
+        data = json.loads(raw)
+    except (UnicodeDecodeError, json.JSONDecodeError) as exc:
+        flash(f"Invalid JSON file: {exc}", "error")
+        return redirect(url_for("admin.admin_index"))
+
+    counts = import_snapshot(repo, data, clear=clear)
+    mode = "Cleared DB and imported" if clear else "Merged"
     flash(
-        f"Wiped all data and reseeded — {total} entities, {counts['domains']} domains.",
+        f"{mode} snapshot — {counts['dimensions']} dimensions, "
+        f"{counts['entities']} entities, {counts['domains']} domains, "
+        f"{counts['combinations']} combinations, {counts['results']} results, "
+        f"{counts['scores']} scores.",
         "success",
     )
     return redirect(url_for("admin.admin_index"))