Feature : get open intervals

[Mziserman]

No description provided.

[berkes]

Edit: I noticed some new issues with my implementation. Working on it now.

There is a bug in this implementation. I cannot pinpoint it exactly, as I have a hard time following all the loops.

The bug resulted in day "6" getting several additional entries. I presume the reindexing causes that, but cannot entirely confirm.

So I greatly simplified your implementation by using Ruby-isms (chains) rather than nested looping.
This suits my needs, and fixes the bug, bu may have some details omitted, I'm not too confident, yet.

     def get_open_intervals(opening_hours_string, from, to)
        date_ranges = OpeningHoursConverter::OpeningHoursParser.new.parse(opening_hours_string)

        intervals = get_time_iterator(date_ranges).select do |interval|
          interval[:start] >= from && interval[:end] <= to
        end

        intervals.map { |interval| [interval[:start].wday, interval] }.to_h
      end

Note that this will use the Ruby default of indexing weeks with Sunday being 0 rather than your implementation that has Monday as 0.