FIX: Add Type column to Flag Status CSV export (#30756)

This Type column is a special ":post" column on the
Flag Status report, so it did not show by default in
the CSV export of that report. This adds it so the
type of flag e.g. illegal, off topic, innapropriate
is shown in the CSV output.

app/jobs/regular/export_csv_file.rb

@@ -218,6 +218,9 @@ module Jobs
         elsif label[:type] == :topic
           titles[label[:properties][:id]] = label[:title]
           header << label[:properties][:id]
+        elsif label[:type] == :post
+          titles[label[:properties][:truncated_raw]] = label[:title]
+          header << label[:properties][:truncated_raw]
         else
           titles[label[:property]] = label[:title]
           header << label[:property]

spec/models/report_spec.rb

@@ -699,7 +699,7 @@ RSpec.describe Report do
 
     context "with flags" do
       let(:flagger) { Fabricate(:user, refresh_auto_groups: true) }
-      let(:post) { Fabricate(:post, user: flagger) }
+      let(:post) { Fabricate(:post, user: Fabricate(:user)) }
 
       before { freeze_time }
 
@@ -723,6 +723,26 @@ RSpec.describe Report do
         expect(row[:resolution]).to eq("No action")
         expect(row[:response_time]).to eq(nil)
       end
+
+      it "exports the CSV of the report correctly" do
+        result =
+          PostActionCreator.new(flagger, post, PostActionType.types[:spam], message: "bad").perform
+
+        result.reviewable.perform(flagger, :agree_and_hide)
+        expect(result.success).to eq(true)
+        expect(report.data).to be_present
+
+        exporter = Jobs::ExportCsvFile.new
+        exporter.entity = "report"
+        exporter.extra = HashWithIndifferentAccess.new(name: "flags_status")
+        exporter.current_user = flagger
+        exported_csv = []
+        exporter.report_export { |entry| exported_csv << entry }
+        expect(exported_csv[0]).to eq(["Type", "Assigned", "Poster", "Flagger", "Resolution time"])
+        expect(exported_csv[1]).to eq(
+          ["spam", flagger.username, post.user.username, flagger.username, "0.0"],
+        )
+      end
     end
   end