request.rb

require 'pry'

class SolrRequest

  attr_accessor :params

  def initialize(params = {})
    @params = params
  end

  def handle_all_needs?(needs)
    (needs & params.keys) == needs
  end

  def handle_only_wants?(wants)
    (params.keys & wants) == params.keys
  end

  def handle?(request)
    handle_all_needs?(request[:need]) and
    handle_only_wants?(request[:need] + request[:want])
  end

end

# all needs, no wants = true
puts SolrRequest.new(first: 'blaine', last: 'sch').handle?(
  need: [:first, :last],
  want: [:middle]
)


# all needs, all wants = true
puts SolrRequest.new(first: 'blaine', last: 'sch', middle: 'micahel').handle?(
  need: [:first, :last],
  want: [:middle]
)

# no needs, all wants = false
puts SolrRequest.new(middle: 'micahel').handle?(
  need: [:first, :last],
  want: [:middle]
)

# no needs, no wants = false
puts SolrRequest.new().handle?(
  need: [:first, :last],
  want: [:middle]
)

# has more than enough = false
puts SolrRequest.new(first: 'blaine', last: 'sch', mi: 'm').handle?(
  need: [:first, :last],
  want: [:middle]
)