Serialize all new endpoints

app/controllers/api/v2/campaign_actions_controller.rb

@@ -37,7 +37,7 @@ def merge_additional_fields(model)
 
   def get_campaign_action_causes(action_id)
     CampaignAction.find(action_id)&.causes.map do |cac|
-      cac.serializable_hash.symbolize_keys.merge({joined: get_status(cac.id, request)})
+      cac.serializable_hash.symbolize_keys.merge({joined: get_status(cac.id, request, user)})
     end
   end
 end

app/controllers/api/v2/campaigns_controller.rb

@@ -52,7 +52,7 @@ def merge_additional_fields(model)
 
   def get_campaign_causes(campaign)
     campaign.causes.map do |cc|
-      cc.serializable_hash.symbolize_keys.merge({joined: get_status(cc.id, request)})
+      cc.serializable_hash.symbolize_keys.merge({joined: get_status(cc.id, request, user)})
     end
   end
 end

app/controllers/api/v2/causes_controller.rb

@@ -1,30 +1,11 @@
 # frozen_string_literal: true
-include ::V2::Progress::UserProgress
 
 class Api::V2::CausesController < APIApplicationController
   def index
-    render json: { data: causes_data }, status: :ok
+    render json: Cause.all, root: :data, status: :ok, adapter: :json, request: request, user: user, each_serializer: V2::CauseSerializer
   end
 
   def show
-    render json: { data: cause_data }, status: :ok
-  end
-
-private
-
-  def causes_data
-    Cause.all.map do |a|
-      a.serializable_hash.symbolize_keys.merge(additional_fields(a.id))
-    end
-  end
-
-  def cause_data
-    Cause.find(params[:id]).serializable_hash.symbolize_keys.merge(additional_fields(params[:id]))
-  end
-
-  def additional_fields(cause_id)
-    {
-      joined: get_status(cause_id, request)
-    }
+    render json: Cause.find(params[:id]), root: :data, status: :ok, adapter: :json, request: request, user: user, serializer: V2::CauseSerializer
   end
 end

app/controllers/api/v2/learning_resources_controller.rb

@@ -37,7 +37,7 @@ def merge_additional_fields(model)
 
   def get_learning_resource_causes(learning_resource_id)
     LearningResource.find(learning_resource_id)&.causes.map do |lrc|
-      lrc.serializable_hash.symbolize_keys.merge({joined: get_status(lrc.id, request)})
+      lrc.serializable_hash.symbolize_keys.merge({joined: get_status(lrc.id, request, user)})
     end
   end
 end

app/serializers/v2/cause_serializer.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+include ::V2::Progress::UserProgress
+
+class V2::CauseSerializer < ActiveModel::Serializer
+  attributes :id, :image, :icon, :name, :description, :joiners, :created_at, :updated_at, :joined
+
+  def joined
+    get_status(object.id, @instance_options[:request], @instance_options[:user])
+  end
+end

app/services/v2/progress/user_progress.rb

@@ -1,7 +1,7 @@
 module V2
   module Progress
     module UserProgress
-      def get_status(cause_id, request)
+      def get_status(cause_id, request, user)
         return 'Authentication failed' unless request.headers['token'] && user
 
         user.joined_cause?(cause_id.to_i)