Add GraphQL snippet FileInputType

app/graphql/types/snippets/file_input_action_enum.rb

+# frozen_string_literal: true
+
+module Types
+  module Snippets
+    class FileInputActionEnum < BaseEnum
+      graphql_name 'SnippetFileInputActionEnum'
+      description 'Type of a snippet file input action'
+
+      value 'create', value: :create
+      value 'update', value: :update
+      value 'delete', value: :delete
+      value 'move', value: :move
+    end
+  end
+end

app/graphql/types/snippets/file_input_type.rb

+# frozen_string_literal: true
+
+module Types
+  module Snippets
+    class FileInputType < BaseInputObject # rubocop:disable Graphql/AuthorizeTypes
+      graphql_name 'SnippetFileInputType'
+      description 'Represents an action to perform over a snippet file'
+
+      argument :action, Types::Snippets::FileInputActionEnum,
+               description: 'Type of input action',
+               required: true
+
+      argument :previous_path, GraphQL::STRING_TYPE,
+               description: 'Previous path of the snippet file',
+               required: false
+
+      argument :file_path, GraphQL::STRING_TYPE,
+               description: 'Path of the snippet file',
+               required: true
+
+      argument :content, GraphQL::STRING_TYPE,
+               description: 'Snippet file content',
+               required: false
+    end
+  end
+end

changelogs/unreleased/fj-add-snippet-file-input-action.yml

+---
+title: Add GraphQL snippet FileInputType
+merge_request: 34442
+author:
+type: other

spec/graphql/types/snippets/file_input_action_enum_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Types::Snippets::FileInputActionEnum do
+  specify { expect(described_class.graphql_name).to eq('SnippetFileInputActionEnum') }
+
+  it 'exposes all file input action types' do
+    expect(described_class.values.keys).to eq(%w[create update delete move])
+  end
+end

spec/graphql/types/snippets/file_input_type_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Types::Snippets::FileInputType do
+  specify { expect(described_class.graphql_name).to eq('SnippetFileInputType') }
+
+  it 'has the correct arguments' do
+    expect(described_class.arguments.keys).to match_array(%w[filePath action previousPath content])
+  end
+
+  it 'sets the type of action argument to FileInputActionEnum' do
+    expect(described_class.arguments['action'].type.of_type).to eq(Types::Snippets::FileInputActionEnum)
+  end
+end