bih/spotify-ruby

#!/usr/bin/env ruby
# frozen_string_literal: true

component_contents = """
# frozen_string_literal: true

module Spotify
  class SDK
    class %s < Base
    end
  end
end
""".strip + "\n"

spec_contents = """
# frozen_string_literal: true

require \"spec_helper\"

RSpec.describe Spotify::SDK::%s do
  # let(:session) { build(:session, access_token: \"access_token\") }
  # subject { Spotify::SDK.new(session).%s }
end
""".strip + "\n"

class StringManipulation < Struct.new(:name)
  def perform
    [
      name,
      klass_name
    ]
  end

  private

  def klass_name
    @klass_name = name.gsub(/[^a-zA-Z_]/i, "").downcase
    raise "Name must exist" if @klass_name.length == 0
    raise "Name must only contain lowercase letters and/or underscores" if @klass_name != name
    @klass_name.split(/[_]/).reduce("") do |acc, word|
      acc + word[0].upcase + word[1..-1].downcase
    end
  end
end

class FileGenerator < Struct.new(:type, :path, :contents)
  def perform!
    check_if_already_exists!
    write_to_file!
    puts "-> Generated #{type} in #{path}"
  end

  private

  def full_path
    @full_path ||= File.expand_path(path)
  end

  def check_if_already_exists!
    raise "File #{full_path} already exists" if File.exist?(full_path)
  end

  def write_to_file!
    file = File.open(full_path, "w+")
    file.write(contents)
    file.close
  end
end

begin
  name, klass_name = StringManipulation.new(ARGV[0]).perform

  # Generate the actual model.
  component = FileGenerator.new
  component.type = :component
  component.path = "lib/spotify/sdk/%s.rb" % name
  component.contents = component_contents % klass_name
  component.perform!

  # Generate the spec file.
  spec = FileGenerator.new
  spec.type = :spec
  spec.path = "spec/lib/spotify/sdk/%s_spec.rb" % name
  spec.contents = spec_contents % [klass_name, name]
  spec.perform!

  puts "SUCCESS: You just need to include it in lib/spotify/sdk.rb"
rescue StandardError => error
  puts "ERROR: #{error}"
end