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| @@ -1,9 +1,155 @@ | ||
| require 'date' | ||
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| ## | ||
| # SgStrangeCalendar クラスはカスタムカレンダーを生成するためのクラスです。 | ||
| # 年、日付の配置、およびカレンダーの形式（縦・横）を指定してカレンダーを作成します。 | ||
| # | ||
| # 主な機能: | ||
| # - カレンダーの縦方向/横方向の出力 | ||
| # - 日付のフォーマットと配置 | ||
| class SgStrangeCalendar | ||
| # 各月の日数（通常年） | ||
| DAYS_IN_MONTH = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31] | ||
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| # 各月の日数（閏年） | ||
| DAYS_IN_MONTH_LEAP = [31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31] | ||
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| # 月の総数 | ||
| MONTHS_NUM = 12 | ||
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| # 月の名前 | ||
| MONTHS_NAMES = %w[January February March April May June July August September October November December] | ||
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| # 曜日の名前 | ||
| DAYS_NAMES = %w[Sunday Monday Tuesday Wednesday Thursday Friday Saturday] | ||
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| private_constant :DAYS_IN_MONTH | ||
| private_constant :DAYS_IN_MONTH_LEAP | ||
| private_constant :MONTHS_NUM | ||
| private_constant :MONTHS_NAMES | ||
| private_constant :DAYS_NAMES | ||
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| ## | ||
| # カレンダーを初期化します。 | ||
| # | ||
| # - year: カレンダーを生成する年。 | ||
| # - today: 現在の日付（デフォルトはnil）。 | ||
| # | ||
| # @param year [Integer] カレンダーを生成する年 | ||
| # @param today [Date, nil] 現在の日付（オプション） | ||
| def initialize(year, today = nil) | ||
| # write your code here | ||
| @year = year | ||
| @today = today | ||
| @isLeapYear = Date.leap?(year) | ||
| @primary_length = 12 | ||
| @secondary_length = 37 | ||
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| @first_date_of_year = Date.new(year, 1, 1) | ||
| @date_array = set_up_date_array(highlight_today: !@today.nil?) | ||
| end | ||
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| ## | ||
| # カレンダーを生成してそれを返す | ||
| # | ||
| # @param vertical [Boolean] カレンダーを縦方向に表示する場合はtrue（デフォルトはfalse） | ||
| # @return [String] テーブル | ||
| def generate(vertical: false) | ||
| # write your code here | ||
| short_days = DAYS_NAMES.map { |day| day[0...2] } | ||
| repeated_days = short_days.cycle.take(37) | ||
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| short_months = MONTHS_NAMES.map { |month| month[0...3] } | ||
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| unless vertical | ||
| header_labels = repeated_days | ||
| row_labels = short_months | ||
| date_array = @date_array | ||
| else | ||
| header_labels = short_months | ||
| row_labels = repeated_days | ||
| date_array = @date_array.transpose | ||
| end | ||
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| date_format_size = header_labels.first.length | ||
| row_label_format_size = @year.to_s.length | ||
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| header = "#{@year} #{header_labels.join(' ')}" | ||
| rows = row_labels.map.with_index do |label, row_index| | ||
| # それぞれの要素の書式を合わせる | ||
| formatted_dates = date_array[row_index].map { |date| date.to_s.rjust(date_format_size) } | ||
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| formatted_dates = formatted_dates.each_with_object("") do |date, acc_string| | ||
| if date.include?("[") | ||
| # `[数字]` の場合、余分なスペースを削除してそのまま追加 | ||
| if date.length > date_format_size + 1 | ||
| acc_string.rstrip! | ||
| acc_string << "#{date}" | ||
| elsif date.length == date_format_size + 1 | ||
| acc_string << "#{date}" | ||
| else | ||
| acc_string << " #{date}" | ||
| end | ||
| else | ||
| # 通常の日付はスペース付きで追加 | ||
| acc_string << "#{date} " | ||
| end | ||
| end | ||
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| "#{label.ljust(row_label_format_size)} #{formatted_dates}".rstrip | ||
| end | ||
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| [header, rows].join("\n").rstrip | ||
| end | ||
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| private | ||
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| ## | ||
| # カレンダーの内部データ構造を初期化します。 | ||
| # | ||
| # @param highlight_today [Boolean] 今日の日付を強調するか否か | ||
| # @return [Array<Array<Integer>>] 月ごとの日付が格納された二次元配列 | ||
| def set_up_date_array(highlight_today:) | ||
| # 12 * 37の二次元配列 本カレンダーのテーブルの構造と一致する | ||
| date_array = Array.new(@primary_length) { Array.new(@secondary_length) } | ||
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| # 1日の前に何マススキップされているかを格納する変数 | ||
| skipped_date = @first_date_of_year.wday | ||
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| 0...@primary_length.times do |month_index| | ||
| month_array = date_array[month_index] | ||
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| # その月の日数 | ||
| days = days_in_month(month_index + 1) | ||
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| # その月において、日数を考慮しない際にもっと大きい日数 | ||
| # [nil, nil, 1, 2 .. 31, 32, 33]なら33を指す | ||
| max_date_number_in_this_row = nil | ||
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| 0...@secondary_length.times do |day_index| | ||
| date = day_index - skipped_date + 1 | ||
| if day_index >= skipped_date && date <= days | ||
| if highlight_today && @today.day == date && @today.month - 1 == month_index | ||
| month_array[day_index] = "[#{date}]" | ||
| else | ||
| month_array[day_index] = date | ||
| end | ||
| end | ||
| max_date_number_in_this_row = date if day_index == @secondary_length - 1 | ||
| end | ||
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| skipped_date = (9 - max_date_number_in_this_row + days) % 7 | ||
| end | ||
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| date_array | ||
| end | ||
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| ## | ||
| # 指定された月の日数を取得します。 | ||
| # | ||
| # @param month [Integer] 月（1〜12） | ||
| # @return [Integer] 月の日数 | ||
| def days_in_month(month) | ||
| # @yearは必須であるから、nil判定しない | ||
| @isLeapYear = Date.leap?(@year) if @isLeapYear.nil? | ||
| @isLeapYear ? DAYS_IN_MONTH_LEAP[month - 1]: DAYS_IN_MONTH[month - 1] | ||
| end | ||
| end |
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