Gab Social. All are welcome.

app/presenters/group_relationships_presenter.rb

@@ -0,0 +1,55 @@
+# frozen_string_literal: true
+
+class GroupRelationshipsPresenter
+    attr_reader :member, :admin
+  
+    def initialize(group_ids, current_account_id, **options)
+      @group_ids          = group_ids.map { |a| a.is_a?(Group) ? a.id : a }
+      @current_account_id = current_account_id
+  
+      @member    = cached[:member].merge(Group.member_map(@uncached_group_ids, @current_account_id))
+      @admin     = cached[:admin].merge(Group.admin_map(@uncached_group_ids, @current_account_id))
+  
+      cache_uncached!
+  
+      @member.merge!(options[:member_map] || {})
+      @admin.merge!(options[:admin_map] || {})
+    end
+  
+    private
+  
+    def cached
+      return @cached if defined?(@cached)
+  
+      @cached = {
+        member: {},
+        admin: {},
+      }
+  
+      @uncached_group_ids = []
+      
+      @group_ids.each do |group_id|
+        maps_for_group = Rails.cache.read("relationship:#{@current_account_id}:#{group_id}")
+  
+        if maps_for_group.is_a?(Hash)
+          @cached.deep_merge!(maps_for_group)
+        else
+          @uncached_group_ids << group_id
+        end
+      end
+  
+      @cached
+    end
+  
+    def cache_uncached!
+      @uncached_group_ids.each do |group_id|
+        maps_for_account = {
+          member:     { group_id => member[group_id] },
+          admin:      { group_id => admin[group_id] },
+        }
+  
+        Rails.cache.write("relationship:#{@current_account_id}:#{group_id}", maps_for_account, expires_in: 1.day)
+      end
+    end
+  end
+