Breaking: Remove pybzar as a barcode reader (#12065)

src/documents/barcodes.py

@@ -28,8 +28,6 @@ from documents.utils import maybe_override_pixel_limit
 from paperless.config import BarcodeConfig
 
 if TYPE_CHECKING:
-    from collections.abc import Callable
-
     from PIL import Image
 
 logger = logging.getLogger("paperless.barcodes")
@@ -262,26 +260,6 @@ class BarcodePlugin(ConsumeTaskPlugin):
 
         return barcodes
 
-    @staticmethod
-    def read_barcodes_pyzbar(image: Image.Image) -> list[str]:
-        barcodes = []
-
-        from pyzbar import pyzbar
-
-        # Decode the barcode image
-        detected_barcodes = pyzbar.decode(image)
-
-        # Traverse through all the detected barcodes in image
-        for barcode in detected_barcodes:
-            if barcode.data:
-                decoded_barcode = barcode.data.decode("utf-8")
-                barcodes.append(decoded_barcode)
-                logger.debug(
-                    f"Barcode of type {barcode.type} found: {decoded_barcode}",
-                )
-
-        return barcodes
-
     def detect(self) -> None:
         """
         Scan all pages of the PDF as images, updating barcodes and the pages
@@ -294,14 +272,6 @@ class BarcodePlugin(ConsumeTaskPlugin):
         # No op if not a TIFF
         self.convert_from_tiff_to_pdf()
 
-        # Choose the library for reading
-        if settings.CONSUMER_BARCODE_SCANNER == "PYZBAR":
-            reader: Callable[[Image.Image], list[str]] = self.read_barcodes_pyzbar
-            logger.debug("Scanning for barcodes using PYZBAR")
-        else:
-            reader = self.read_barcodes_zxing
-            logger.debug("Scanning for barcodes using ZXING")
-
         try:
             # Read number of pages from pdf
             with Pdf.open(self.pdf_file) as pdf:
@@ -349,7 +319,7 @@ class BarcodePlugin(ConsumeTaskPlugin):
                     )
 
                 # Detect barcodes
-                for barcode_value in reader(page):
+                for barcode_value in self.read_barcodes_zxing(page):
                     self.barcodes.append(
                         Barcode(current_page_number, barcode_value, self.settings),
                     )

src/documents/tests/test_barcodes.py

@@ -4,7 +4,6 @@ from contextlib import contextmanager
 from pathlib import Path
 from unittest import mock
 
-import pytest
 from django.conf import settings
 from django.test import TestCase
 from django.test import override_settings
@@ -25,13 +24,6 @@ from documents.tests.utils import FileSystemAssertsMixin
 from documents.tests.utils import SampleDirMixin
 from paperless.models import ApplicationConfiguration
 
-try:
-    import zxingcpp  # noqa: F401
-
-    HAS_ZXING_LIB = True
-except ImportError:
-    HAS_ZXING_LIB = False
-
 
 class GetReaderPluginMixin:
     @contextmanager
@@ -48,7 +40,6 @@ class GetReaderPluginMixin:
         reader.cleanup()
 
 
-@override_settings(CONSUMER_BARCODE_SCANNER="PYZBAR")
 class TestBarcode(
     DirectoriesMixin,
     FileSystemAssertsMixin,
@@ -606,7 +597,6 @@ class TestBarcode(
             self.assertDictEqual(separator_page_numbers, {0: False})
 
 
-@override_settings(CONSUMER_BARCODE_SCANNER="PYZBAR")
 class TestBarcodeNewConsume(
     DirectoriesMixin,
     FileSystemAssertsMixin,
@@ -784,36 +774,12 @@ class TestAsnBarcode(DirectoriesMixin, SampleDirMixin, GetReaderPluginMixin, Tes
 
             self.assertEqual(document.archive_serial_number, 123)
 
-    @override_settings(CONSUMER_BARCODE_SCANNER="PYZBAR")
     def test_scan_file_for_qrcode_without_upscale(self) -> None:
         """
         GIVEN:
             - A printed and scanned PDF document with a rather small QR code
         WHEN:
             - ASN barcode detection is run with default settings
-            - pyzbar is used for detection, as zxing would behave differently, and detect the QR code
-        THEN:
-            - ASN is not detected
-        """
-
-        test_file = self.BARCODE_SAMPLE_DIR / "barcode-qr-asn-000123-upscale-dpi.pdf"
-
-        with self.get_reader(test_file) as reader:
-            reader.detect()
-            self.assertEqual(len(reader.barcodes), 0)
-
-    @override_settings(CONSUMER_BARCODE_SCANNER="PYZBAR")
-    @override_settings(CONSUMER_BARCODE_DPI=600)
-    @override_settings(CONSUMER_BARCODE_UPSCALE=1.5)
-    def test_scan_file_for_qrcode_with_upscale(self) -> None:
-        """
-        GIVEN:
-            - A printed and scanned PDF document with a rather small QR code
-        WHEN:
-            - ASN barcode detection is run with 600dpi and an upscale factor of 1.5 and pyzbar
-            - pyzbar is used for detection, as zxing would behave differently.
-              Upscaling is a workaround for detection problems with pyzbar,
-              when you cannot switch to zxing (aarch64 build problems of zxing)
         THEN:
             - ASN 123 is detected
         """
@@ -825,23 +791,24 @@ class TestAsnBarcode(DirectoriesMixin, SampleDirMixin, GetReaderPluginMixin, Tes
             self.assertEqual(len(reader.barcodes), 1)
             self.assertEqual(reader.asn, 123)
 
+    @override_settings(CONSUMER_BARCODE_DPI=600)
+    @override_settings(CONSUMER_BARCODE_UPSCALE=1.5)
+    def test_scan_file_for_qrcode_with_upscale(self) -> None:
+        """
+        GIVEN:
+            - A printed and scanned PDF document with a rather small QR code
+        WHEN:
+            - ASN barcode detection is run with 600dpi and an upscale factor of 1.5
+        THEN:
+            - ASN 123 is detected
+        """
 
-@pytest.mark.skipif(
-    not HAS_ZXING_LIB,
-    reason="No zxingcpp",
-)
-@override_settings(CONSUMER_BARCODE_SCANNER="ZXING")
-class TestBarcodeZxing(TestBarcode):
-    pass
+        test_file = self.BARCODE_SAMPLE_DIR / "barcode-qr-asn-000123-upscale-dpi.pdf"
 
-
-@pytest.mark.skipif(
-    not HAS_ZXING_LIB,
-    reason="No zxingcpp",
-)
-@override_settings(CONSUMER_BARCODE_SCANNER="ZXING")
-class TestAsnBarcodesZxing(TestAsnBarcode):
-    pass
+        with self.get_reader(test_file) as reader:
+            reader.detect()
+            self.assertEqual(len(reader.barcodes), 1)
+            self.assertEqual(reader.asn, 123)
 
 
 class TestTagBarcode(DirectoriesMixin, SampleDirMixin, GetReaderPluginMixin, TestCase):