Improve the usability for incorporating multiple map tile services

[imysl0]

1. Add the mapServices.js file to facilitate the easier addition of map providers.
2. Include a dropdown menu to conveniently select different tile services.
   

[Simon-Laux]

Code LGTM, didn't test yet

[Simon-Laux]

maybe save last selected tile provider in LocalStorage?

Also we could whitelist all those providers as a temporary fix in deltachat desktop:

const hostRules = 'MAP * ~NOTFOUND, EXCLUDE *.openstreetmap.org, EXCLUDE tile.openstreetmap.org, EXCLUDE *.tile.osm.org, EXCLUDE *.tile.openstreetmap.de, EXCLUDE *.tile.openstreetmap.fr, EXCLUDE *.tile.opentopomap.org, EXCLUDE *.is.autonavi.com, EXCLUDE tm.amap.com, EXCLUDE *.map.gtimg.com, EXCLUDE *.tianditu.gov.cn'

But for a more permanent solution I'd prefer if those requests go over delta chat core (http request api), so that they respect proxy settings for that account.

[imysl0]

maybe save last selected tile provider in LocalStorage?

Also we could whitelist all those providers as a temporary fix in deltachat desktop:

const hostRules = 'MAP * ~NOTFOUND, EXCLUDE *.openstreetmap.org, EXCLUDE tile.openstreetmap.org, EXCLUDE *.tile.osm.org, EXCLUDE *.tile.openstreetmap.de, EXCLUDE *.tile.openstreetmap.fr, EXCLUDE *.tile.opentopomap.org, EXCLUDE *.is.autonavi.com, EXCLUDE tm.amap.com, EXCLUDE *.map.gtimg.com, EXCLUDE *.tianditu.gov.cn'

But for a more permanent solution I'd prefer if those requests go over delta chat core (http request api), so that they respect proxy settings for that account.

Hi Simon：
Both suggestions are pretty good, but I'm still not sure how to proceed, because I'm not a programmer. The previous code was also written with the help of AI. Let me think about it (maybe wait for AI to improve a bit, hahaha).

[nicodh]

When testing this PR I find that at least the first 5 of the chinese tile server show no data and the last one shows data only for a very low zoom level.

What's the reason? Are the tileserver maybe blocked for IPs out of china?

[imysl0]

When testing this PR I find that at least the first 5 of the chinese tile server show no data and the last one shows data only for a very low zoom level.

What's the reason? Are the tileserver maybe blocked for IPs out of china?

It's working normally on my end. It seems that access restrictions have been imposed somewhere. Can you directly access https://ditu.amap.com/? This is Amap's online website.

[nicodh]

Yes I can access it, but it requires some registration to access the map. So that's probably the problem

[nicodh]

Maybe depending from where I call the website?

[nicodh]

Ok, I didn't understand the chinese text, it was just an overlay I could click away

[nicodh]

So when testing this PR again with extended hostRules it turned out it's a question of zoom level. If I stay on a low zoom level I can see the map, but not when I zoom in to see details

Edit: that seems to happen outside of china. In China mainland I can zoom into a much higher level