Add custom date format to pages, add 'updated' field again

Reverts changes of c2a68cc where I accidentally removed support for 'updated' field, see comments of issue #164 for details.

.themes/classic/source/_includes/post/date.html

@@ -2,6 +2,14 @@
 {% capture date_formatted %}{{ page.date_formatted }}{{ post.date_formatted }}{% endcapture %}
 {% capture has_date %}{{ date | size }}{% endcapture %}
 
+{% capture updated %}{{ page.updated }}{{ post.updated }}{% endcapture %}
+{% capture updated_formatted %}{{ page.updated_formatted }}{{ post.updated_formatted }}{% endcapture %}
+{% capture was_updated %}{{ updated | size }}{% endcapture %}
+
 {% if has_date != '0' %}
-  {% capture time %}<time datetime="{{ date | datetime | date_to_xmlschema }}" pubdate>{{ date_formatted }}</time>{% endcapture %}
+  {% capture time %}<time datetime="{{ date | datetime | date_to_xmlschema }}" pubdate{% if updated %} data-updated="true"{% endif %}>{{ date_formatted }}</time>{% endcapture %}
 {% endif %}
+
+{% if was_updated != '0' %}
+  {% capture updated %}<time datetime="{{ updated | datetime | date_to_xmlschema }}" class="updated">Updated {{ updated_formatted }}</time>{% endcapture %}
+{% else %}{% assign updated = false %}{% endif %}

.themes/classic/source/_layouts/page.html

@@ -15,7 +15,7 @@ layout: default
     <footer>
       {% if page.date or page.author %}<p class="meta">
         {% if page.author %}{% include post/author.html %}{% endif %}
-        {% include post/date.html %}{{ time }}
+        {% include post/date.html %}{% if updated %}{{ updated }}{% else %}{{ time }}{% endif %}
         {% if page.categories %}{% include post/categories.html %}{% endif %}
       </p>{% endif %}
       {% unless page.sharing == false %}

.themes/classic/source/_layouts/post.html

@@ -9,7 +9,7 @@ single: true
   <footer>
     <p class="meta">
       {% include post/author.html %}
-      {% include post/date.html %}{{ time }}
+      {% include post/date.html %}{% if updated %}{{ updated }}{% else %}{{ time }}{% endif %}
       {% include post/categories.html %}
     </p>
     {% unless page.sharing == false %}

plugins/date.rb

@@ -29,6 +29,16 @@ module Octopress
       end
     end
 
+    def format_date(date, format)
+      date = datetime(date)
+      if format.nil? || format.empty? || format == "ordinal"
+        date_formatted = ordinalize(date)
+      else
+        date_formatted = date.strftime(format)
+      end
+      date_formatted
+    end
+
   end
 end
 
@@ -38,25 +48,18 @@ module Jekyll
   class Post
     include Octopress::Date
 
-    attr_accessor :date_formatted
-
     # Convert this post into a Hash for use in Liquid templates.
     #
     # Returns <Hash>
     def to_liquid
-      format = self.site.config['date_format']
+      date_format = self.site.config['date_format']
-      if format.nil? || format.empty? || format == "ordinal"
-        date_formatted = ordinalize(self.date)
-      else
-        date_formatted = self.date.strftime(format)
-      end
-
       self.data.deep_merge({
-        "title"          => self.data["title"] || self.slug.split('-').select {|w| w.capitalize! || w }.join(' '),
+        "title"             => self.data['title'] || self.slug.split('-').select {|w| w.capitalize! || w }.join(' '),
         "url"               => self.url,
         "date"              => self.date,
         # Monkey patch
-        "date_formatted" => date_formatted,
+        "date_formatted"    => format_date(self.date, date_format),
+        "updated_formatted" => self.data.has_key?('updated') ? format_date(self.data['updated'], date_format) : nil,
         "id"                => self.id,
         "categories"        => self.categories,
         "next"              => self.next,
@@ -64,6 +67,29 @@ module Jekyll
         "tags"              => self.tags,
         "content"           => self.content })
     end
+  end
 
+  class Page
+    include Octopress::Date
+
+    # Initialize a new Page.
+    #
+    # site - The Site object.
+    # base - The String path to the source.
+    # dir  - The String path between the source and the file.
+    # name - The String filename of the file.
+    def initialize(site, base, dir, name)
+      @site = site
+      @base = base
+      @dir  = dir
+      @name = name
+
+      self.process(name)
+      self.read_yaml(File.join(base, dir), name)
+      # Monkey patch
+      date_format = self.site.config['date_format']
+      self.data['date_formatted']    = format_date(self.data['date'], date_format) if self.data.has_key?('date')
+      self.data['updated_formatted'] = format_date(self.data['updated'], date_format) if self.data.has_key?('updated')
+    end
   end
 end