server/snapshots: add snapshot lists

server/szurubooru/api/snapshot_api.py

@@ -0,0 +1,17 @@
+from szurubooru import search
+from szurubooru.api.base_api import BaseApi
+from szurubooru.func import auth, snapshots
+
+def _serialize_snapshot(snapshot):
+    earlier_snapshot = snapshots.get_previous_snapshot(snapshot)
+    return snapshots.serialize_snapshot(snapshot, earlier_snapshot)
+
+class SnapshotListApi(BaseApi):
+    def __init__(self):
+        super().__init__()
+        self._search_executor = search.SearchExecutor(search.SnapshotSearchConfig())
+
+    def get(self, ctx):
+        auth.verify_privilege(ctx.user, 'snapshots:list')
+        return self._search_executor.execute_and_serialize(
+            ctx, _serialize_snapshot, 'snapshots')