require 'spec_helper'

describe Gitlab::Sanitizers::Exif do
  let(:sanitizer) { described_class.new }

  describe '#batch_clean' do
    context 'with image uploads' do
      let!(:uploads) { create_list(:upload, 3, :with_file, :issuable_upload) }

      it 'processes all uploads if range ID is not set' do
        expect(sanitizer).to receive(:clean).exactly(3).times

        sanitizer.batch_clean
      end

      it 'processes only uploads in the selected range' do
        expect(sanitizer).to receive(:clean).once

        sanitizer.batch_clean(start_id: uploads[1].id, stop_id: uploads[1].id)
      end

      it 'pauses if sleep_time is set' do
        expect(sanitizer).to receive(:sleep).exactly(3).times.with(1.second)
        expect(sanitizer).to receive(:clean).exactly(3).times

        sanitizer.batch_clean(sleep_time: 1)
      end
    end

    it 'filters only jpg/tiff images' do
      create(:upload, path: 'filename.jpg')
      create(:upload, path: 'filename.jpeg')
      create(:upload, path: 'filename.JPG')
      create(:upload, path: 'filename.tiff')
      create(:upload, path: 'filename.TIFF')
      create(:upload, path: 'filename.png')
      create(:upload, path: 'filename.txt')

      expect(sanitizer).to receive(:clean).exactly(5).times
      sanitizer.batch_clean
    end
  end

  describe '#clean' do
    let(:uploader) { create(:upload, :with_file, :issuable_upload).build_uploader }

    context "no dry run" do
      it "removes exif from the image" do
        uploader.store!(fixture_file_upload('spec/fixtures/rails_sample.jpg'))

        original_upload = uploader.upload
        expected_args = ["exiftool", "-all=", "-tagsFromFile", "@", *Gitlab::Sanitizers::Exif::EXCLUDE_PARAMS, "--IPTC:all", "--XMP-iptcExt:all", kind_of(String)]

        expect(sanitizer).to receive(:extra_tags).and_return(["", 0])
        expect(sanitizer).to receive(:exec_remove_exif!).once.and_call_original
        expect(uploader).to receive(:store!).and_call_original
        expect(Gitlab::Popen).to receive(:popen).with(expected_args) do |args|
          File.write("#{args.last}_original", "foo") if args.last.start_with?(Dir.tmpdir)

          [expected_args, 0]
        end

        sanitizer.clean(uploader, dry_run: false)

        expect(uploader.upload.id).not_to eq(original_upload.id)
        expect(uploader.upload.path).to eq(original_upload.path)
      end

      it "ignores image without exif" do
        expected_args = ["exiftool", "-all", "-j", "-sort", "--IPTC:all", "--XMP-iptcExt:all", kind_of(String)]

        expect(Gitlab::Popen).to receive(:popen).with(expected_args).and_return(["[{}]", 0])
        expect(sanitizer).not_to receive(:exec_remove_exif!)
        expect(uploader).not_to receive(:store!)

        sanitizer.clean(uploader, dry_run: false)
      end

      it "raises an error if the exiftool fails with an error" do
        expect(Gitlab::Popen).to receive(:popen).and_return(["error", 1])

        expect { sanitizer.clean(uploader, dry_run: false) }.to raise_exception(RuntimeError, "failed to get exif tags: error")
      end
    end

    context "dry run" do
      it "doesn't change the image" do
        expect(sanitizer).to receive(:extra_tags).and_return({ 'foo' => 'bar' })
        expect(sanitizer).not_to receive(:exec_remove_exif!)
        expect(uploader).not_to receive(:store!)

        sanitizer.clean(uploader, dry_run: true)
      end
    end
  end

  describe "#extra_tags" do
    it "returns a list of keys for exif file" do
      tags = '[{
                "DigitalSourceType": "some source",
                "ImageHeight": 654
              }]'

      expect(Gitlab::Popen).to receive(:popen).and_return([tags, 0])

      expect(sanitizer.extra_tags('filename')).not_to be_empty
    end

    it "returns an empty list for file with only whitelisted and ignored tags" do
      tags = '[{
                "ImageHeight": 654,
                "Megapixels": 0.641
              }]'

      expect(Gitlab::Popen).to receive(:popen).and_return([tags, 0])

      expect(sanitizer.extra_tags('some file')).to be_empty
    end
  end
end