feat: Add export product drive participants button

app/controllers/product_drives_controller.rb

@@ -74,6 +74,14 @@ def show
     @selected_name_filter = filter_params[:by_name]
     @selected_item_category = filter_params[:by_item_category_id]
     @product_drive = current_organization.product_drives.includes(:donations).find(params[:id])
+
+    respond_to do |format|
+      format.html
+      format.csv do
+        send_data Exports::ExportProductDriveParticipantsCSVService.generate_csv(@product_drive),
+          filename: "Product-Drive-Participants-#{@product_drive.name}-#{Time.zone.today}.csv"
+      end
+    end
   end
 
   def update

app/services/exports/export_product_drive_participants_csv_service.rb

@@ -0,0 +1,31 @@
+module Exports
+  class ExportProductDriveParticipantsCSVService
+    HEADERS = ["Donation Id", "Product Drive Participant", "Storage Location", "Quantity", "In Kind Value"].freeze
+
+    class << self
+      include ItemsHelper
+
+      def generate_csv(product_drive)
+        CSV.generate do |csv|
+          csv << HEADERS
+
+          product_drive.donations.includes(:product_drive_participant).find_each do |donation|
+            csv << generate_row(donation)
+          end
+        end
+      end
+
+      private
+
+      def generate_row(donation)
+        [
+          donation.id.to_s,
+          donation.product_drive_participant_id ? donation.product_drive_participant.business_name : nil,
+          donation.storage_location.name,
+          donation.line_items.count(&:quantity),
+          dollar_value(donation.value_per_itemizable)
+        ]
+      end
+    end
+  end
+end

app/views/product_drives/show.html.erb

@@ -95,6 +95,18 @@
             To add additional donations to this product drive, please edit that donation and select this product drive from the appropriate dropdown.
           </p>
           <!-- /.card-footer-->
+          <div class="card-footer">
+            <span class="float-right">
+              <%=
+                if @product_drive.donations.length > 0
+                  download_button_to(
+                    product_drive_path(@product_drive, format: :csv),
+                    text: "Export Product Drive Participants"
+                  )
+                end
+              %>
+            </span>
+          </div>
         </div>
         <!-- /.card -->
       </div>

spec/requests/product_drives_requests_spec.rb

@@ -291,6 +291,34 @@
 
         expect(response.body).to include("4862167")
       end
+
+      context "csv" do
+        it 'is successful' do
+          product_drive = create(:product_drive, organization: organization)
+
+          get product_drive_path(id: product_drive.id, format: :csv)
+
+          expect(response).to be_successful
+          expect(response.header['Content-Type']).to include 'text/csv'
+
+          expected_headers = Exports::ExportProductDriveParticipantsCSVService::HEADERS
+          expect(response.body.chomp.split(",")).to eq(expected_headers)
+        end
+
+        it 'returns ONLY the associated product drive participants' do
+          product_drive = create(:product_drive, organization: organization)
+          participant = create(:product_drive_participant, business_name: "Associated Participant")
+          create(:donation, product_drive: product_drive, product_drive_participant: participant)
+
+          other_participant = create(:product_drive_participant, business_name: "Unassociated Participant")
+          create(:donation, product_drive: create(:product_drive, organization: organization), product_drive_participant: other_participant)
+
+          get product_drive_path(id: product_drive.id, format: :csv)
+
+          expect(response.body).to include("Associated Participant")
+          expect(response.body).not_to include("Unassociated Participant")
+        end
+      end
     end
 
     describe "DELETE #destroy" do