T158575 get wikidata for Q123 requests via proxy

[Eccenux]

Support getting object data from Wikidata via Wikimedia maps proxy.

On Wikimedia Phabricator:
T158575 WIWOSM wikidata not being updated for Q123 requests

[Eccenux]

Seems to work fine when testing small-ish shapes.

Troms og Finnmark:
https://wiwosm.toolforge.org/test-osm-on-ol/kml-on-ol.php?lang=wikidata&title=Q52600648

Milan:
https://wiwosm.toolforge.org/test-osm-on-ol/kml-on-ol.php?lang=wikidata&title=Q490

[Eccenux]

Alaska is a bit weird, but seems at least partially intentional:
https://wiwosm.toolforge.org/test-osm-on-ol/kml-on-ol.php?lang=wikidata&title=Q797&zoom=4&lat=61.7939&lon=-161.10352&layers=B000TTT

// big shapes zoom to extent which seem overly big for alaska
if (vector_layer.getDataExtent().getHeight() > 500) {
	map.zoomToExtent(vector_layer.getDataExtent(), false);
}
// this is skipped as h = 4986362.2804698
if (!args.lon && vector_layer.getDataExtent().getHeight() <= 500) {
	map.setCenter(vector_layer.getDataExtent().getCenterLonLat(), 17);
}

The weird part might come from the fact that Alaska is on the border of the map (part of it is on negative lon and part of it is on positive lon). Seems like OpenLayers bug. They've probably fixed this in later versions.

Not very important in any case.

[Eccenux]

Might mitigate this partially by ignoring zoomToExtent when args.lon and zoom is set. This way permanent links will also work better (you will be able to link to zoomed-in shapes - not possible currently).

BTW. I might want to get args.lat/lon directly from URL... Seems like too much is done in PHP.