Level3までのコード

lib/calendar/month.rb

@@ -0,0 +1,36 @@
+require 'date'
+
+module Calendar
+  class Month
+    NAMES = %w[Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec].freeze
+
+    def initialize(year:, value:)
+      @year = year
+      @value = value
+      @name = NAMES[@value - 1]
+      @day_count = day_count
+      @dates = (1..@day_count).map { |number| Date.new(@year.value, @value, number) }
+    end
+
+    def to_array
+      [@name, *([''] * first_date_wday), *@dates]
+    end
+
+    private
+
+    def day_count
+      case @value
+      when 1, 3, 5, 7, 8, 10, 12 then 31
+      when 4, 6, 9, 11 then 30
+      when 2
+        @year.leap_year? ? 29 : 28
+      else
+        raise 'Invalid month'
+      end
+    end
+
+    def first_date_wday
+      @dates.first.wday
+    end
+  end
+end

lib/calendar/table.rb

@@ -0,0 +1,85 @@
+module Calendar
+  class Table
+    def initialize(rows:, today: nil)
+      @rows = rows
+      @today = today
+    end
+
+    def generate(vertical: false)
+      vertical ? generate_with_vertical : generate_with_horizontal
+    end
+
+    private
+
+    def generate_with_horizontal
+      header = @rows.first.join(' ')
+      body = @rows[1..].map do |row|
+        [
+          "#{row.first} ",
+          *row[1..].map do |cell|
+            if cell.is_a?(Date)
+              string_format = cell == @today ? '[%-d]' : '%_2d'
+              cell.strftime(string_format)
+            else
+              '  '
+            end
+          end
+        ].join(' ')
+      end
+      text = [header, *body].join("\n")
+      return text unless @today
+
+      replace_today_for_horizontal(text:, today: @today)
+    end
+
+    def generate_with_vertical
+      header = transposed_rows.first.join(' ')
+      body = transposed_rows[1..].map do |row|
+        [
+          "#{row.first}  ",
+          *row[1..].map do |cell|
+            if cell.is_a?(Date)
+              string_format =
+                if cell == @today
+                  space_size = cell.day > 9 ? 0 : 1
+                  ' ' * space_size + '[%-d]'
+                else
+                  '%_3d'
+                end
+              cell.strftime(string_format)
+            else
+              '   '
+            end
+          end
+        ].join(' ').rstrip
+      end
+      text = [header, *body].join("\n")
+      return text unless @today
+
+      replace_today_for_vertical(text:, today: @today)
+    end
+
+    def transposed_rows
+      return @transposed_rows if @transposed_rows
+
+      max_length = @rows.map { |row| row.length }.max
+      filled_rows = @rows.map do |row|
+        row + [''] * (max_length - row.length)
+      end
+      @transposed_rows = filled_rows.transpose
+    end
+
+    def replace_today_for_horizontal(text:, today:)
+      result = /[^\S\n\r]\[(#{today.day})\][^\S\n\r]?/.match(text)
+      captured = result.to_a[0]
+      text.gsub(captured, today.day > 9 ? captured.strip : captured.rstrip)
+    end
+
+    def replace_today_for_vertical(text:, today:)
+      result = /\[(#{today.day})\][^\S\n\r]?/.match(text)
+      captured = result.to_a[0]
+      text.gsub(captured, captured.rstrip)
+    end
+  end
+end
+

lib/calendar/year.rb

@@ -0,0 +1,32 @@
+require_relative 'month'
+require_relative 'table'
+require 'date'
+
+module Calendar
+  class Year
+    attr_reader :value, :today
+
+    def initialize(value:, today: nil)
+      @value = value
+      @today = today
+      @months = (1..Month::NAMES.size).map { |value| Month.new(year: self, value:) }
+    end
+
+    def leap_year?
+      date = Date.new(@value, 1, 1)
+      date.leap?
+    end
+
+    def generate(vertical: false)
+      rows = [header, *@months.map(&:to_array)]
+      table = Table.new(rows:, today: @today)
+      table.generate(vertical:)
+    end
+
+    private
+
+    def header
+      [@value.to_s, *(%w[Su Mo Tu We Th Fr Sa] * 5), 'Su', 'Mo']
+    end
+  end
+end

lib/sg_strange_calendar.rb

@@ -1,9 +1,11 @@
+require_relative 'calendar/year'
+
 class SgStrangeCalendar
   def initialize(year, today = nil)
-    # write your code here
+    @year = Calendar::Year.new(value: year, today:)
   end
 
   def generate(vertical: false)
-    # write your code here
+    @year.generate(vertical:)
   end
 end

test/sg_strange_calendar_test.rb

@@ -44,7 +44,6 @@ def test_level_1_for_2025
   end
 
   def test_level_2_for_2024_01_01
-    skip "レベル2にチャレンジする人はこの行を削除してください"
     expected = <<~TXT.chomp
       2024 Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo
       Jan     [1] 2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
@@ -66,7 +65,6 @@ def test_level_2_for_2024_01_01
   end
 
   def test_level_2_for_2024_12_09
-    skip "レベル2にチャレンジする人はこの行を削除してください"
     expected = <<~TXT.chomp
       2024 Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo
       Jan      1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
@@ -88,7 +86,6 @@ def test_level_2_for_2024_12_09
   end
 
   def test_level_2_for_2025_03_31
-    skip "レベル2にチャレンジする人はこの行を削除してください"
     expected = <<~TXT.chomp
       2025 Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo
       Jan            1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
@@ -110,7 +107,6 @@ def test_level_2_for_2025_03_31
   end
 
   def test_level_2_all
-    skip "レベル2にチャレンジする人はこの行を削除してください"
     file_path = File.expand_path('level2.txt', File.dirname(__FILE__))
     calendars = File.read(file_path).lines.each_slice(13).map(&:join).map(&:chomp)
     from_date = Date.new(2025, 1, 1)
@@ -123,7 +119,6 @@ def test_level_2_all
   end
 
   def test_level_3_for_2024
-    skip "レベル2およびレベル3にチャレンジする人はこの行を削除してください"
     expected = <<~TXT.chomp
       2024 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
       Su                                     1           1
@@ -169,7 +164,6 @@ def test_level_3_for_2024
   end
 
   def test_level_3_for_2024_01_01
-    skip "レベル2およびレベル3にチャレンジする人はこの行を削除してください"
     expected = <<~TXT.chomp
       2024 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
       Su                                     1           1
@@ -216,7 +210,6 @@ def test_level_3_for_2024_01_01
   end
 
   def test_level_3_for_2024_12_09
-    skip "レベル2およびレベル3にチャレンジする人はこの行を削除してください"
     expected = <<~TXT.chomp
       2024 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
       Su                                     1           1
@@ -263,7 +256,6 @@ def test_level_3_for_2024_12_09
   end
 
   def test_level_3_for_2025_03_31
-    skip "レベル2およびレベル3にチャレンジする人はこの行を削除してください"
     expected = <<~TXT.chomp
       2025 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
       Su                         1
@@ -310,7 +302,6 @@ def test_level_3_for_2025_03_31
   end
 
   def test_level_3_all
-    skip "レベル2およびレベル3にチャレンジする人はこの行を削除してください"
     file_path = File.expand_path('level3.txt', File.dirname(__FILE__))
     calendars = File.read(file_path).lines.each_slice(38).map(&:join).map(&:chomp)
     from_date = Date.new(2025, 1, 1)