Facade pattern

facade.rb

class Dashboard
  def initialize(filters)
    @filters = filters
  end

  def call
    users = FetchUsers.new(@filters).call
    activities = FetchActivities.new(@filters).call

    match_activities(users, activities
  end

  private

  def match_activities(users, activities)
    hash = {}
    users.each { |user| hash[user[:name]] = activities[user[:id]] }

    hash
  end
end

class FetchUsers
  def initialize(filters)
    @filters = filters
  end

  def call
    # Returns users in the following format:
    # [ 
    #   { id: 1, name: 'John Doe' },
    #   { id: 2, name: 'Richard Roe' },
    #   { id: 3, name: 'Janie Doe' }
    # ]
    UsersForeignAPI.new(@filters).call
  end
end

class FetchActivities
  def initialize(filters)
    @filters = filters
  end

  def call
    # Returns activities in the following format:
    # {
    #   1 => { calls: 3, messages: 8 },
    #   2 => { calls: 14, messages: 3 },
    #   3 => { calls: 4, messages: 11 }
    # }
    ActivitiesForeignAPI.new(@filters).call
  end
end

filters = {from: 'Wed, 29 Sep 2021', to: 'Fri, 29 Oct 2021'}
Dashboard.new(filters).call
# => {
#      "John Doe"=>{:calls=>3, :messages=>8},
#      "Richard Roe"=>{:calls=>14, :messages=>3},
#      "Janie Doe"=>{:calls=>4, :messages=>11}
#    }