1 files changed, 67 insertions, 0 deletions
diff --git a/app/components/diffs/stats_component.rb b/app/components/diffs/stats_component.rb
new file mode 100644
index 00000000000..55589c7b015
--- /dev/null
+++ b/app/components/diffs/stats_component.rb
@@ -0,0 +1,67 @@
+# frozen_string_literal: true
+
+module Diffs
+  class StatsComponent < BaseComponent
+    attr_reader :diff_files
+
+    def initialize(diff_files:)
+      @diff_files = diff_files
+      @changed ||= diff_files.size
+      @added   ||= diff_files.sum(&:added_lines)
+      @removed ||= diff_files.sum(&:removed_lines)
+    end
+
+    def diff_files_data
+      diffs_map = @diff_files.map do |f|
+        {
+            href: "##{helpers.hexdigest(f.file_path)}",
+            title: f.new_path,
+            name: f.file_path,
+            path: diff_file_path_text(f),
+            icon: diff_file_changed_icon(f),
+            iconColor: "#{diff_file_changed_icon_color(f)}",
+            added: f.added_lines,
+            removed: f.removed_lines
+        }
+      end
+
+      Gitlab::Json.dump(diffs_map)
+    end
+
+    # Disabled undercoverage reports for this method
+    # as it returns a false positive on the last line,
+    # which is covered in the tests
+    #
+    # Issue: https://gitlab.com/gitlab-org/gitlab/-/issues/357381
+    #
+    # :nocov:
+    def diff_file_path_text(diff_file, max: 60)
+      path = diff_file.new_path
+
+      return path unless path.size > max && max > 3
+
+      "...#{path[-(max - 3)..]}"
+    end
+    # :nocov:
+
+    private
+
+    def diff_file_changed_icon(diff_file)
+      if diff_file.deleted_file?
+        "file-deletion"
+      elsif diff_file.new_file?
+        "file-addition"
+      else
+        "file-modified"
+      end
+    end
+
+    def diff_file_changed_icon_color(diff_file)
+      if diff_file.deleted_file?
+        "danger"
+      elsif diff_file.new_file?
+        "success"
+      end
+    end
+  end
+end