Merge pull request #32190 from liwii/use_year_names

Add `use_year_names` option to date_select tag

actionview/CHANGELOG.md

+*   Add `year_format` option to date_select tag. This option makes it possible to customize year
+    names. Lambda should be passed to use this option.
+
+    Example:
+
+        date_select('user_birthday', '', start_year: 1998, end_year: 2000, year_format: ->year { "Heisei #{year - 1988}" })
+
+    The HTML produced: 
+
+        <select id="user_birthday__1i" name="user_birthday[(1i)]">
+        <option value="1998">Heisei 10</option>
+        <option value="1999">Heisei 11</option>
+        <option value="2000">Heisei 12</option>
+        </select>
+        /* The rest is omitted */
+
+    *Koki Ryu*
+
 *   Fix JavaScript views rendering does not work with Firefox when using
     Content Security Policy.
 

actionview/lib/action_view/helpers/date_helper.rb

@@ -850,7 +850,7 @@ def select_year
             raise ArgumentError, "There are too many years options to be built. Are you sure you haven't mistyped something? You can provide the :max_years_allowed parameter."
           end
 
-          build_options_and_select(:year, val, options)
+          build_select(:year, build_year_options(val, options))
         end
       end
 
@@ -933,6 +933,21 @@ def month_name(number)
           end
         end
 
+        # Looks up year names by number.
+        #
+        #   year_name(1998) # => 1998
+        #
+        # If the <tt>:year_format</tt> option is passed:
+        #
+        #   year_name(1998) # => "Heisei 10"
+        def year_name(number)
+          if year_format_lambda = @options[:year_format]
+            year_format_lambda.call(number)
+          else
+            number
+          end
+        end
+
         def date_order
           @date_order ||= @options[:order] || translated_date_order
         end
@@ -995,6 +1010,34 @@ def build_options(selected, options = {})
           (select_options.join("\n") + "\n").html_safe
         end
 
+        # Build select option HTML for year.
+        # If <tt>year_format</tt> option is not passed
+        #  build_year_options(1998, start: 1998, end: 2000)
+        #  => "<option value="1998" selected="selected">1998</option>
+        #      <option value="1999">1999</option>
+        #      <option value="2000">2000</option>"
+        #
+        # If <tt>year_format</tt> option is passed
+        #  build_year_options(1998, start: 1998, end: 2000, year_format: ->year { "Heisei #{ year - 1988 }" })
+        #  => "<option value="1998" selected="selected">Heisei 10</option>
+        #      <option value="1999">Heisei 11</option>
+        #      <option value="2000">Heisei 12</option>"
+        def build_year_options(selected, options = {})
+          start = options.delete(:start)
+          stop = options.delete(:end)
+          step = options.delete(:step)
+
+          select_options = []
+          start.step(stop, step) do |value|
+            tag_options = { value: value }
+            tag_options[:selected] = "selected" if selected == value
+            text = year_name(value)
+            select_options << content_tag("option".freeze, text, tag_options)
+          end
+
+          (select_options.join("\n") + "\n").html_safe
+        end
+
         # Builds select tag from date type and HTML select options.
         #  build_select(:month, "<option value="1">January</option>...")
         #  => "<select id="post_written_on_2i" name="post[written_on(2i)]">

actionview/test/template/date_helper_test.rb

@@ -560,6 +560,15 @@ def test_select_year_with_position
     assert_dom_equal expected, select_year(Date.current, include_position: true,  start_year: 2003, end_year: 2005)
   end
 
+  def test_select_year_with_custom_names
+    year_format_lambda = ->year { "Heisei #{ year - 1988 }" }
+    expected = %(<select id="date_year" name="date[year]">\n).dup
+    expected << %(<option value="2003">Heisei 15</option>\n<option value="2004">Heisei 16</option>\n<option value="2005">Heisei 17</option>\n)
+    expected << "</select>\n"
+
+    assert_dom_equal expected, select_year(nil, start_year: 2003, end_year: 2005, year_format: year_format_lambda)
+  end
+
   def test_select_hour
     expected = %(<select id="date_hour" name="date[hour]">\n).dup
     expected << %(<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08" selected="selected">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n)