Add end_color liquid filter

It simplifies templates.

Note that the content of the cell has been inverted to get rid of the 'Ends'/'Ended' prefix. It's a small thing, but it complexifies things a lot !

_includes/table.html

@@ -50,22 +50,16 @@
     {%- elsif type == "timeago" %}
       <td>{{ value | timeago }}</td>
     {%- elsif type == "end-date" %}
-      {%- if value == true %}
-      <td class="bg-green-000">Yes</td>
+      <td class="{{ row[field] | end_color }}">
+      {%- if value == true %}}
+        Yes
       {%- elsif value == false %}
-      <td class="bg-red-000">No</td>
+        No
       {%- else %}
-        {%- assign row_date = row[field] | date: '%s' %}
-        {%- assign site_date = site.time | date: '%s' %}
-        {%- assign days_between = row_date | minus: site_date | divided_by: 86400 %}
-        {%- if days_between < 0 %}
-      <td class="bg-red-000">Ended {{ row[field] | timeago }} <div>({{ row[field] | date_to_string }})</div></td>
-        {%- elsif days_between < 120 %}
-      <td class="bg-yellow-200">Ends {{ row[field] | timeago }} <div>({{ row[field] | date_to_string }})</div></td>
-        {%- else %}
-      <td class="bg-green-000">Ends {{ row[field] | timeago }} <div>({{ row[field] | date_to_string }})</div></td>
-        {%- endif %}
+        {{ row[field] | date_to_string }}
+        <div>({{ row[field] | timeago }})</div>
       {%- endif %}
+      </td>
     {%- else %}
       <td>{{ row[field] }}</td>
     {%- endif %}

_plugins/end-of-life-filters.rb

@@ -56,6 +56,46 @@ def remove_first_element(html, element)
   def drop_zero_patch(input)
     input.end_with?(".0") ? input[0, input.length - 2] : input
   end
+
+  # Compute the number of days from now to the given date.
+  #
+  # Usage (assuming now is '2023-01-01'):
+  # {{ '2023-01-10' | days_from_now }} => 9
+  # {{ '2023-01-01' | days_from_now }} => 0
+  # {{ '2022-12-31' | days_from_now }} => -1
+  def days_from_now(from)
+    from_timestamp = Date.parse(from.to_s).to_time.to_i
+    to_timestamp = Date.today.to_time.to_i
+    return (from_timestamp - to_timestamp) / (60 * 60 * 24)
+  end
+
+  # Compute the color according to the given number of days until the end.
+  #
+  # Usage:
+  # {{ true | end_color }} => bg-green-000
+  # {{ false | end_color }} => bg-red-000
+  # {{ '2025-01-01' | days_until_end: '2023-01-01' | end_color }} => bg-green-000
+  # {{ '2023-01-02' | days_until_end: '2023-01-01' | end_color }} => bg-yellow-200
+  # {{ '2021-01-01' | days_until_end: '2023-01-01' | end_color }} => bg-red-000
+  # {{ '2025-01-01' | end_color }} => bg-green-000
+  def end_color(input)
+    if input == true
+      return 'bg-green-000'
+    elsif input == false
+      return 'bg-red-000'
+    elsif input.is_a? Integer
+      if input < 0
+        return 'bg-red-000'
+      elsif input < 120
+        return 'bg-yellow-200'
+      else
+        return 'bg-green-000'
+      end
+    else
+      # Assuming it's a date
+      return end_color(days_from_now(input))
+    end
+  end
 end
 
 Liquid::Template.register_filter(EndOfLifeFilter)