Add geolocation to the user on editing the user-informations

[heiglandreas]

Currently no geolocation is set for a user.

To enable any kind of location-based feature it would be a great idea to directly have the geolocation (in form of latitude and longitude) as part of the users information.

On login it would be possible to check the github-API for the location of the user and pass that to nominatim (http://nominatim.openstreetmap.org/search?format=json&q=[url_encoded location]) and use the first result as default. That vaoue could then be displayed on a map for the user to "relocate" that default value to something more appropriate for her or him.

I'm using the first part of that approach on http://php.ug/#mentoring by currently parsing the wikis HTML, retrieving the github-usernames, geting the users location and passing that to nominatim. If nothing sensible comes back from nominatim (due to it not being able to resolve the value in the users location-info) the user will not be displayed on the map. That could be much easier if the user can alter that location just for phpmentoring.

That would ease Geographic filtering (#20) on the site itself and on php.ug I could simply consume the API and would not have to do a nightly parsing run and use a local cache for getting the data.

[PurpleBooth]

I feel that this is partly addressed with my PR #63, the introduction of a user's preferred timezone at least allows you to identify users that will be awake at the same time as you.

[heiglandreas]

As you say, it's only partially....

The timezone gives us the information on when a User (might) be awake. But it does not give us the information whether the user is near my own location or not, whether I might be able to talk to the user in my own language or not or might be able to have real face-to-face meetings. And it makes it way harder to put a pin onto a map to show where a user lives 😉. No one says that you have to give your exact location, but you can if you want to.

And from the geolocation we can easily get the correct timezone 😉

For the old listing I parsed the location the user provided in the github-account info (if available) and when no reasonable result was found there wasn't a pin shown on the map. And when someone said "Germany" as location the pin was positioned right in the middle of germany.