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# OpenProject is an open source project management software.
# Copyright (C) 2012-2021 the OpenProject GmbH
#
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# Copyright (C) 2006-2013 Jean-Philippe Lang
# Copyright (C) 2010-2013 the ChiliProject Team
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# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
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#++

require 'spec_helper'

describe ::API::Utilities::PropertyNameConverter do
  describe '#from_ar_name' do
    let(:attribute_name) { :an_attribute }

    subject { described_class.from_ar_name(attribute_name) }

    it 'stringifies attribute names' do
      is_expected.to be_a(String)
    end

    it 'camelizes attribute names' do
      is_expected.to eql('anAttribute')
    end

    context 'foreign keys' do
      let(:attribute_name) { :thing_id }

      it 'eliminates the id suffix' do
        is_expected.to eql('thing')
      end
    end

    context 'custom fields' do
      let(:attribute_name) { :cf_1337 }

      it 'converts short custom fields to their long form' do
        is_expected.to eql('customField1337')
      end
    end

    # N.B. not re-iterating all existing known replacements here. Just using a single example
    # to verify that it is done at all
    context 'special replacements' do
      let(:attribute_name) { :assigned_to }

      it 'performs special replacements' do
        is_expected.to eql('assignee')
      end

      context 'foreign keys' do
        let(:attribute_name) { :assigned_to_id }

        it 'sanitizes id-suffix before replacement lookup' do
          is_expected.to eql('assignee')
        end
      end
    end
  end

  describe '#to_ar_name' do
    let(:attribute_name) { 'anAttribute' }
    let(:context) { FactoryBot.build_stubbed(:work_package) }

    subject { described_class.to_ar_name(attribute_name, context: context) }

    it 'snake_cases attribute names' do
      is_expected.to eql('an_attribute')
    end

    context 'foreign keys' do
      let(:attribute_name) { 'status' }

      it 'does not add an id suffix by default' do
        is_expected.to eql('status')
      end

      context 'requesting ids via refer_to_ids' do
        subject { described_class.to_ar_name(attribute_name, context: context, refer_to_ids: true) }

        context 'for keys referring to a belongs_to association' do
          let(:attribute_name) { 'status' }

          it 'adds an id suffix' do
            is_expected.to eql('status_id')
          end
        end

        context 'for keys referring to a has_many association' do
          let(:attribute_name) { 'watcher' }

          it 'adds an id suffix' do
            is_expected.to eql('watcher_ids')
          end
        end

        context 'for non-foreign keys' do
          let(:attribute_name) { 'subject' }

          it 'does not add an id suffix' do
            is_expected.to eql('subject')
          end
        end

        context 'does not append an id to pluarlized attributes' do
          let(:attribute_name) { 'estimatedTime' }

          it 'does not add an id suffix' do
            is_expected.to eql('estimated_hours')
          end
        end
      end
    end

    context 'custom fields' do
      let(:attribute_name) { 'customField1337' }

      it 'converts long custom fields to their short form' do
        is_expected.to eql('cf_1337')
      end
    end

    context 'special replacements' do
      let(:attribute_name) { 'assignee' }

      it 'performs special replacements' do
        is_expected.to eql('assigned_to')
      end

      context 'foreign keys' do
        let(:attribute_name) { 'assignee' }
        subject { described_class.to_ar_name(attribute_name, context: context, refer_to_ids: true) }

        it 'correctly appends the id suffix' do
          is_expected.to eql('assigned_to_id')
        end
      end

      context 'inapropriate back-replacement' do
        # should not be translated back to updated_at, which is transformed for ar->api
        let(:attribute_name) { 'updatedAt' }

        it 'should not be performed' do
          is_expected.to eql('updated_at')
        end

        context 'in an appropriate context' do
          let(:context) { FactoryBot.build_stubbed(:version) }

          it 'should be performed' do
            is_expected.to eql('updated_at')
          end
        end
      end

      context 'inappropriate replacement as context does not respond to it with foreign key' do
        let(:attribute_name) { 'type' }
        subject { described_class.to_ar_name(attribute_name, context: context, refer_to_ids: true) }

        it 'does not take the special replacement but appends the id suffix' do
          is_expected.to eql('type_id')
        end
      end
    end
  end
end