Feature/dns sorting 3507

[kroseneg]

This adds an option to the service grid to sort and group the hosts by the DNS hierarchy of the host name.
See #3507 .

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[kroseneg]

Hi I've just signed the CLA. Please re-check my pull request, thank you. Korbinian

…

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[decosilo]

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[bobapple]

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[nilmerg]

Hi,

I don't think we will merge this for the following reasons:

• It has a massive disadvantage because it only has access to a partial result returned by the database. Only a subset of so called pages will be ordered, though there may be more data on previous/next pages which would influence the shown result.
• Such a functionality won't be added here anymore. Icinga DB Web already supports sorting by multiple columns. The suggestion made here is already possible by using such a sort parameter: ?sort=host.vars.sub1,host.vars.sub0,host.vars.domain
  • A widget in the UI allowing to assemble such a rule more easily is already planned

Though, thanks for your contribution and effort anyway. It just would have been a good idea to ask whether such an implementation is worth taking on 😉