Remove unused pagination data

app/serializers/paginated_diff_entity.rb

@@ -23,36 +23,13 @@ class PaginatedDiffEntity < Grape::Entity
   end
 
   expose :pagination do
-    expose :current_page
-    expose :next_page
-    expose :total_pages
-    expose :next_page_href do |diffs|
-      next unless next_page
-
-      project = merge_request.target_project
-
-      diffs_batch_namespace_project_json_merge_request_path(
-        namespace_id: project.namespace.to_param,
-        project_id: project.to_param,
-        id: merge_request.iid,
-        page: next_page,
-        format: :json
-      )
+    expose :total_pages do |diffs, options|
+      options.dig(:pagination_data, :total_pages)
     end
   end
 
   private
 
-  %i[current_page next_page total_pages].each do |method|
-    define_method method do
-      pagination_data[method]
-    end
-  end
-
-  def pagination_data
-    options.fetch(:pagination_data, {})
-  end
-
   def merge_request
     options[:merge_request]
   end

lib/gitlab/diff/file_collection/base.rb

@@ -88,11 +88,7 @@ module Gitlab
         private
 
         def empty_pagination_data
-          {
-            current_page: nil,
-            next_page: nil,
-            total_pages: nil
-          }
+          { total_pages: nil }
         end
 
         def diff_stats_collection

lib/gitlab/diff/file_collection/merge_request_diff_batch.rb

@@ -21,8 +21,6 @@ module Gitlab
           @paginated_collection = load_paginated_collection(batch_page, batch_size, diff_options)
 
           @pagination_data = {
-            current_page: nil,
-            next_page: nil,
             total_pages: @paginated_collection.blank? ? nil : relation.size
           }
         end

spec/controllers/projects/merge_requests/diffs_controller_spec.rb

@@ -472,8 +472,6 @@ RSpec.describe Projects::MergeRequests::DiffsController do
         diff_view: :inline,
         merge_ref_head_diff: nil,
         pagination_data: {
-          current_page: nil,
-          next_page: nil,
           total_pages: nil
         }.merge(pagination_data)
       }
@@ -515,7 +513,7 @@ RSpec.describe Projects::MergeRequests::DiffsController do
 
       it_behaves_like 'serializes diffs with expected arguments' do
         let(:collection) { Gitlab::Diff::FileCollection::MergeRequestDiffBatch }
-        let(:expected_options) { collection_arguments(current_page: nil, total_pages: 20).merge(merge_ref_head_diff: false) }
+        let(:expected_options) { collection_arguments(total_pages: 20).merge(merge_ref_head_diff: false) }
       end
 
       it_behaves_like 'successful request'
@@ -555,7 +553,7 @@ RSpec.describe Projects::MergeRequests::DiffsController do
       it_behaves_like 'serializes diffs with expected arguments' do
         let(:collection) { Gitlab::Diff::FileCollection::MergeRequestDiffBatch }
         let(:expected_options) do
-          collection_arguments(current_page: nil, total_pages: 20)
+          collection_arguments(total_pages: 20)
         end
       end
 
@@ -574,7 +572,7 @@ RSpec.describe Projects::MergeRequests::DiffsController do
 
       it_behaves_like 'serializes diffs with expected arguments' do
         let(:collection) { Gitlab::Diff::FileCollection::MergeRequestDiffBatch }
-        let(:expected_options) { collection_arguments(current_page: nil, total_pages: 20) }
+        let(:expected_options) { collection_arguments(total_pages: 20) }
       end
 
       it_behaves_like 'successful request'
@@ -585,7 +583,7 @@ RSpec.describe Projects::MergeRequests::DiffsController do
 
       it_behaves_like 'serializes diffs with expected arguments' do
         let(:collection) { Gitlab::Diff::FileCollection::MergeRequestDiffBatch }
-        let(:expected_options) { collection_arguments(current_page: nil, next_page: nil, total_pages: 20) }
+        let(:expected_options) { collection_arguments(total_pages: 20) }
       end
 
       it_behaves_like 'successful request'

spec/frontend_integration/test_helpers/mock_server/routes/diffs.js

@@ -12,10 +12,7 @@ export default (server) => {
     return {
       ...result,
       pagination: withValues(pagination, {
-        current_page: null,
-        next_page: null,
         total_pages: 1,
-        next_page_href: null,
       }),
     };
   });

spec/lib/gitlab/diff/file_collection/merge_request_diff_batch_spec.rb

@@ -20,7 +20,7 @@ RSpec.describe Gitlab::Diff::FileCollection::MergeRequestDiffBatch do
 
   describe 'initialize' do
     it 'memoizes pagination_data' do
-      expect(subject.pagination_data).to eq(current_page: nil, next_page: nil, total_pages: 20)
+      expect(subject.pagination_data).to eq(total_pages: 20)
     end
   end
 

spec/models/merge_request_diff_spec.rb

@@ -432,9 +432,7 @@ RSpec.describe MergeRequestDiff do
         it 'returns empty pagination data' do
           diffs = diff_with_commits.diffs_in_batch(1, 10, diff_options: diff_options)
 
-          expect(diffs.pagination_data).to eq(current_page: nil,
-                                              next_page: nil,
-                                              total_pages: nil)
+          expect(diffs.pagination_data).to eq(total_pages: nil)
         end
       end
 
@@ -460,9 +458,7 @@ RSpec.describe MergeRequestDiff do
 
           expect(diffs).to be_a(Gitlab::Diff::FileCollection::MergeRequestDiffBatch)
           expect(diffs.diff_files.size).to eq(10)
-          expect(diffs.pagination_data).to eq(current_page: nil,
-                                              next_page: nil,
-                                              total_pages: 20)
+          expect(diffs.pagination_data).to eq(total_pages: 20)
         end
 
         it 'sorts diff files directory first' do
@@ -493,7 +489,7 @@ RSpec.describe MergeRequestDiff do
 
             expect(diffs).to be_a(Gitlab::Diff::FileCollection::Compare)
             expect(diffs.diff_files.size).to eq 10
-            expect(diffs.pagination_data).to eq(current_page: nil, next_page: nil, total_pages: file_count)
+            expect(diffs.pagination_data).to eq(total_pages: file_count)
           end
 
           it 'returns an empty MergeRequestBatch with empty pagination data when the batch is empty' do
@@ -501,7 +497,7 @@ RSpec.describe MergeRequestDiff do
 
             expect(diffs).to be_a(Gitlab::Diff::FileCollection::MergeRequestDiffBatch)
             expect(diffs.diff_files.size).to eq 0
-            expect(diffs.pagination_data).to eq(current_page: nil, next_page: nil, total_pages: nil)
+            expect(diffs.pagination_data).to eq(total_pages: nil)
           end
         end
       end

spec/serializers/paginated_diff_entity_spec.rb

@@ -24,12 +24,7 @@ RSpec.describe PaginatedDiffEntity do
   end
 
   it 'exposes pagination data' do
-    expect(subject[:pagination]).to eq(
-      current_page: nil,
-      next_page: nil,
-      next_page_href: nil,
-      total_pages: 20
-    )
+    expect(subject[:pagination]).to eq(total_pages: 20)
   end
 
   context 'when there are conflicts' do