Simplify and test downloaded changeset element sorting #4612
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To find out which element order makes sense for #4571, I looked at how elements are sorted in changeset downloads. They are sorted by timestamp, then by version. Then I decided to simplify the code by replacing
sort
+ifs withsort_by
, and I noticed that there are no tests for sort order.Cgimap actually sorts further by type and id too: https://github.com/zerebubuth/openstreetmap-cgimap/blob/ea3e59543116fa97fd68e6d97813b1ee46e54290/src/osmchange_responder.cpp#L32. With
sort_by
it's easy to add this to osm-website if required.