Initial commit

app/models/address.rb

@@ -0,0 +1,53 @@
+class Address
+  attr_accessor :street1, :street2, :city, :state, :zip, :country
+
+  def initialize(street1, street2, city, state, zip, country)
+    @street1 = street1
+    @street2 = street2
+    @city = city
+    @state = state
+    @zip = zip
+    @country = country
+  end
+
+  def to_s(format: nil)
+    case format
+    when :full
+      join_with_newline(
+        street1, 
+        street2, 
+        join_with_comma(city, state_and_zip),
+        country
+      )
+    when :condensed
+      join_with_newline(
+        join_with_comma(street1, street2),
+        join_with_comma(city, state_and_zip, country),
+      )
+    else
+      join_with_comma(street1, street2, city, state_and_zip, country)
+    end
+  end
+
+  def present?
+    [street1, street2, city, state, zip, country].any?(&:present?)
+  end
+
+  private
+
+  def join_without_blanks(*parts, separator: ", ")
+    parts.reject(&:blank?).join(separator)
+  end
+
+  def join_with_comma(*parts)
+    join_without_blanks(*parts)
+  end
+
+  def join_with_newline(*parts)
+    join_without_blanks(*parts, separator: "\n")
+  end
+
+  def state_and_zip
+    join_without_blanks(state, zip, separator: " ")
+  end
+end