Adapter pattern for Gem that uses multiple composed classes? - ruby

Question

I'm using the Axlsx gem (https://github.com/randym/axlsx) for generating excel files. I want to refactor my code so that I have a wrapper around the gem just in case I want to switch gems.
Going through this reminds me of the Adapter design pattern. However, there are just so many objects nested underneath the main Package object that I am getting confused as to how to actual create an adapter for it. Ex:
You create a Package object
You access the Workbook within this Package objet
You access the Sheet from the Workbook object, and vice versa
Here are some of my classes:
class ReportGenerator::Base
...
def create_workbook
...
#package = Axlsx::Package.new <---------------------------
#workbook = #package.workbook <---------------------------
#workbook.use_shared_strings = true
end
class Sheet::Base
def initialize(workbook, question, options = {})
...
#sheet = workbook.add_worksheet(:name => sheet_name) <---------------------------
end
def styles
#styles ||= {
"title" => #sheet.workbook.styles.add_style(:sz => 20, :b => true, :alignment => { :wrap_text => true }),
"bold" => #sheet.workbook.styles.add_style(:b => true),
"header" => #sheet.workbook.styles.add_style(:fg_color => "FFFFFF", :bg_color => "ff3333", :sz => 12, :b => true, :alignment => {:horizontal => :center}, :border => {:style => :thin, :color => "FFFFFF"}),
"subheader" => #sheet.workbook.styles.add_style(:fg_color => "FFFFFF", :bg_color => "ff3333", :sz => 12, :b => true, :alignment => {:horizontal => :center}),
"subheader_border_left" => #sheet.workbook.styles.add_style(:fg_color => "FFFFFF", :bg_color => "ff3333", :sz => 12, :b => true, :alignment => {:horizontal => :center}, :border => {:style => :thin, :color => "FFFFFF", :edges => [:left]}),
"blue_link" => #sheet.workbook.styles.add_style(:fg_color => '0000FF'),
"wrap_text" => #sheet.workbook.styles.add_style(:alignment => { :wrap_text => true, :horizontal => :left }),
"percentage" => #sheet.workbook.styles.add_style(:format_code => "0.00%")
}
end
Here's my first stab:
class ExcelWriter
def initialize
#package = Axlsx::Package.new
end
def workbook
#package.workbook
end
# starting to feel like it's not doable within one class..?
end
There are so many classes involved that it feels like I can't wrap everything into one adapter? Or maybe I'm doing it wrong? Any tips would be welcomed.

Answer 1

Focus on what you're actually using and not on existing infrastracture of Axlsx gem. This way you may combine work of several Axlsx objects into 1 method call.
I don't know what you're actually using, so it's hard for me to say which objects do you need.