feature: Add Worksheet#rows monkeypatch

The monkeypatch intention is to use #rows for numeric_values

lib/aspire_budget.rb

@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require 'core_extensions'
+
 require 'configuration'
 
 require 'worksheets/backend_data'

lib/core_extensions.rb

@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+require 'google_drive'
+
+module AspireBudget
+  module CoreExtensions
+    module Worksheet
+      def rows(skip = 0, cell_method: :[])
+        nc = num_cols
+        result = ((1 + skip)..num_rows).map do |row|
+          (1..nc).map { |col| send(cell_method, row, col) }.freeze
+        end
+        result.freeze
+      end
+    end
+  end
+end
+
+# https://github.com/gimite/google-drive-ruby/issues/378
+GoogleDrive::Worksheet.prepend AspireBudget::CoreExtensions::Worksheet

spec/support/google_drive_mock.rb

@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require 'date'
+
 class GoogleDriveMock
   def self.from_config(_)
     Session.new
@@ -36,15 +38,28 @@ def worksheets
   end
 
   class Worksheet
+    CURRENCY_REGEX = /^[$̂€]?([0-9]{1,3},([0-9]{3},)*[0-9]{3}|[0-9]+)(.[0-9][0-9])?$/.freeze
+    LOTUS_DAY_ONE = Date.new(1899, 12, 30).freeze
+    DATE_FORMAT = '%d/%m/%y'
+
     attr_reader :title
 
     def initialize(title, rows)
       @title = title
       @rows = rows
     end
 
-    def rows(skip = 0)
-      @rows.drop(skip)
+    def rows(skip = 0, cell_method: :[])
+      case cell_method
+      when :[]
+        @rows.drop(skip)
+      when :numeric_value
+        @rows.map.with_index do |r, i|
+          r.map.with_index do |_c, j|
+            numeric_value(i + 1, j + 1)
+          end
+        end
+      end
     end
 
     def synchronize
@@ -94,6 +109,17 @@ def []=(row, col, value) # rubocop:disable Metrics/MethodLength
       @rows[row - 1][col - 1] = value
     end
 
+    # assumes that "," is not a decimal separator
+    # assumes date format as defined above
+    def numeric_value(*args)
+      value = self[*args]
+      if value.match?(CURRENCY_REGEX)
+        value.gsub(/[€$,]/, '').to_f
+      elsif value.match?(%r{\d+/\d+/\d+})
+        Float(Date.strptime(value, DATE_FORMAT) - LOTUS_DAY_ONE)
+      end
+    end
+
     def update_cells(starting_row, starting_col, matrix)
       matrix.each_with_index do |row, i|
         row.each_with_index do |cell, j|