base.rb in coltrane-2.1.0

- old
+ new

@@ -1,14 +1,29 @@
 # frozen_string_literal: true
 
 module ColtraneInstruments
   module Guitar
+    DEFAULT_TUNING = %w[E2 A2 D3 G3 B3 E4]
+    DEFAULT_FRETS = 23
     # A base class for operations involving Guitars
     class Base
-      def initialize; end
+      attr_reader :strings, :frets
 
-      def find_chord(target_chord)
-        Chord.new(target_chord, guitar: self).fetch_descendant_chords
+      def self.find_chords(target_chord)
+        unless target_chord.is_a?(Coltrane::Chord)
+          target_chord = Coltrane::Chord.new(name: target_chord)
+        end
+
+        ColtraneInstruments::Guitar::Chord.new(target_chord, guitar: new)
+                                          .fetch_descendant_chords
+      end
+
+      def initialize(tuning = DEFAULT_TUNING, frets = DEFAULT_FRETS)
+        @strings = tuning.map do |p|
+          String.new(Coltrane::Pitch[p], guitar: self)
+        end
+
+        @frets = frets
       end
     end
   end
 end