Add meta link

assets/javascripts/discourse/connectors/category-custom-settings/donations_category_settings.hbs

@@ -4,6 +4,11 @@
     {{text-field value=category.custom_fields.donations_github placeholderKey="discourse_donations.cause.github.setting_placeholder"}}
   </section>
 
+  <section class='field'>
+    <label>{{i18n 'discourse_donations.cause.meta.setting_label'}}</label>
+    {{text-field value=category.custom_fields.donations_meta placeholderKey="discourse_donations.cause.meta.setting_placeholder"}}
+  </section>
+
   <section class='field'>
     <label>{{i18n 'discourse_donations.cause.maintainers.label'}}</label>
     {{user-selector usernames=category.custom_fields.donations_maintainers}}

assets/javascripts/discourse/widgets/donations-category-header-widget.js.es6

@@ -33,6 +33,15 @@ createWidget('category-header-widget', {
             icon: 'github',
             label: 'discourse_donations.cause.github.label',
             href: category.donations_github
+          })),
+          h('div.donations-meta', this.attach('link', {
+            href: category.donations_meta,
+            contents: () => {
+              return [
+                h('img.meta-icon', { attributes: { src: 'https://discourse-meta.s3.dualstack.us-west-1.amazonaws.com/original/3X/b/1/b19ba793155a785bbd9707bc0cabbd3a987fa126.png?v=6' }}),
+                h('span', I18n.t('discourse_donations.cause.meta.label'))
+              ];
+            }
           }))
         ])
       ];

assets/stylesheets/discourse-donations.scss

@@ -142,9 +142,21 @@ div.stripe-errors {
       margin-right: 5px;
     }
 
-    .donations-github a {
+    .donations-github a, .donations-meta a {
       color: inherit;
     }
+
+    .donations-meta {
+      .widget-link {
+        display: flex;
+        align-items: center;
+      }
+      img {
+        width: 17px;
+        height: 17px;
+        margin-right: 4px;
+      }
+    }
   }
 
   .donations-category-users {

config/locales/client.en.yml

@@ -48,6 +48,10 @@ en:
           label: "Repository"
           setting_label: "Github"
           setting_placeholder: "repoistory url"
+        meta:
+          label: "Discussion"
+          setting_label: "Meta"
+          setting_placeholder: "topic url"
         maintainers:
           label: "Maintainers"
       subscription:

plugin.rb

@@ -83,6 +83,14 @@ after_initialize do
         ''
       end
     end
+
+    def donations_meta
+      if custom_fields['donations_meta']
+        custom_fields['donations_meta']
+      else
+        ''
+      end
+    end
   end
 
   if SiteSetting.discourse_donations_cause_category
@@ -96,6 +104,7 @@ after_initialize do
       ActiveModel::ArraySerializer.new(object.donations_maintainers, each_serializer: BasicUserSerializer).as_json
     }
     add_to_serializer(:basic_category, :donations_github) { object.donations_github }
+    add_to_serializer(:basic_category, :donations_meta) { object.donations_meta }
   end
 
   DiscourseEvent.trigger(:donations_ready)