Implement PartnerRequestableItemsService

- if the partner is not in any groups, return all items in
organization
- if the partner is a member in some groups, returns items tagged
by those groups

Author: albertchae

app/controllers/api/v1/partner_requests_controller.rb

@@ -21,9 +21,8 @@ def create
   def show
     return head :forbidden unless api_key_valid?
 
-    organization = Organization.find(params[:id])
-    # replace this with items from partner group
-    render json: organization.valid_items, status: :ok
+    items = PartnerRequestableItemsService.new(organization_id: params[:id], partner_id: params[:partner_id]).call
+    render json: items, status: :ok
   rescue ActiveRecord::RecordNotFound => e
     render json: { error: e.message }, status: :bad_request
   end

app/models/partner.rb

@@ -30,6 +30,10 @@ class Partner < ApplicationRecord
 
   has_many :requests, dependent: :destroy
 
+  has_many :partner_group_memberships, dependent: :destroy
+  has_many :partner_groups, through: :partner_group_memberships
+  has_many :requestable_items, through: :partner_groups, source: :items
+
   has_many_attached :documents
 
   validates :organization, presence: true

app/services/partner_requestable_items_service.rb

@@ -0,0 +1,30 @@
+class PartnerRequestableItemsService
+  def initialize(organization_id:, partner_id:)
+    @organization_id = organization_id
+    @partner_id = partner_id
+  end
+
+  def call
+    return organization.valid_items if partner.partner_groups.empty?
+
+    partner.requestable_items.active.visible.map do |item|
+      {
+        id: item.id,
+        partner_key: item.partner_key,
+        name: item.name
+      }
+    end
+  end
+
+  private
+
+  attr_reader :organization_id, :partner_id
+
+  def organization
+    @organization ||= Organization.find(organization_id)
+  end
+
+  def partner
+    @partner ||= Partner.find(partner_id)
+  end
+end