Add filter by goal

app/components/admin/search_component.html.erb

@@ -1,4 +1,5 @@
 <%= form_tag(url, options) do |f| %>
   <%= text_field_tag :search, search_terms.to_s, placeholder: label, "aria-label": label %>
+  <%= content %>
   <%= submit_tag t("admin.shared.search.search") %>
 <% end %>

app/components/sdg_management/relations/index_component.html.erb

@@ -1,6 +1,10 @@
 <%= header %>
 
-<%= render Admin::SearchComponent.new(label: search_label) %>
+<%= render Admin::SearchComponent.new(label: search_label, class: "complex") do |component| %>
+  <%= component.select_tag :goal_code, goal_options,
+                           include_blank: goal_blank_option,
+                           "aria-label": goal_label %>
+<% end %>
 
 <table>
   <thead>

app/components/sdg_management/relations/index_component.rb

@@ -29,4 +29,16 @@ class SDGManagement::Relations::IndexComponent < ApplicationComponent
     def search_label
       t("admin.shared.search.label.#{model_class.table_name}")
     end
+
+    def goal_label
+      t("admin.shared.search.advanced_filters.sdg_goals.label")
+    end
+
+    def goal_blank_option
+      t("admin.shared.search.advanced_filters.sdg_goals.all")
+    end
+
+    def goal_options
+      options_from_collection_for_select(SDG::Goal.all, :code, :code_and_title, params[:goal_code])
+    end
 end