Feature: Allow setting backend configuration settings via the UI (#5126)

* Saving some start on this

* At least partially working for the tesseract parser

* Problems with migration testing need to figure out

* Work around that error

* Fixes max m_pixels

* Moving the settings to main paperless application

* Starting some consumer options

* More fixes and work

* Fixes these last tests

* Fix max_length on OcrSettings.mode field

* Fix all fields on Common & Ocr settings serializers

* Umbrellla config view

* Revert "Umbrellla config view"

This reverts commit fbaf9f4be30f89afeb509099180158a3406416a5.

* Updates to use a single configuration object for all settings

* Squashed commit of the following:

commit 8a0a49dd57
Author: shamoon <4887959+shamoon@users.noreply.github.com>
Date:   Tue Dec 19 23:02:47 2023 -0800

    Fix formatting

commit 66b2d90c50
Author: shamoon <4887959+shamoon@users.noreply.github.com>
Date:   Tue Dec 19 22:36:35 2023 -0800

    Refactor frontend data models

commit 5723bd8dd8
Author: Adam Bogdał <adam@bogdal.pl>
Date:   Wed Dec 20 01:17:43 2023 +0100

    Fix: speed up admin panel for installs with a large number of documents (#5052)

commit 9b08ce1761
Author: shamoon <4887959+shamoon@users.noreply.github.com>
Date:   Tue Dec 19 15:18:51 2023 -0800

    Update PULL_REQUEST_TEMPLATE.md

commit a6248bec2d
Author: shamoon <4887959+shamoon@users.noreply.github.com>
Date:   Tue Dec 19 15:02:05 2023 -0800

    Chore: Update Angular to v17 (#4980)

commit b1f6f52486
Author: shamoon <4887959+shamoon@users.noreply.github.com>
Date:   Tue Dec 19 13:53:56 2023 -0800

    Fix: Dont allow null custom_fields property via API (#5063)

commit 638d9970fd
Author: shamoon <4887959+shamoon@users.noreply.github.com>
Date:   Tue Dec 19 13:43:50 2023 -0800

    Enhancement: symmetric document links (#4907)

commit 5e8de4c1da
Author: shamoon <4887959+shamoon@users.noreply.github.com>
Date:   Tue Dec 19 12:45:04 2023 -0800

    Enhancement: shared icon & shared by me filter (#4859)

commit 088bad9030
Author: Trenton H <797416+stumpylog@users.noreply.github.com>
Date:   Tue Dec 19 12:04:03 2023 -0800

    Bulk updates all the backend libraries (#5061)

* Saving some work on frontend config

* Very basic but dynamically-generated config form

* Saving work on slightly less ugly frontend config

* JSON validation for user_args field

* Fully dynamic config form

* Adds in some additional validators for a nicer error message

* Cleaning up the testing and coverage more

* Reverts unintentional change

* Adds documentation about the settings and the precedence

* Couple more commenting and style fixes

---------

Co-authored-by: shamoon <4887959+shamoon@users.noreply.github.com>

src/paperless_tika/parsers.py

@@ -10,6 +10,8 @@ from tika_client import TikaClient
 from documents.parsers import DocumentParser
 from documents.parsers import ParseError
 from documents.parsers import make_thumbnail_from_pdf
+from paperless.config import OutputTypeConfig
+from paperless.models import OutputTypeChoices
 
 
 class TikaDocumentParser(DocumentParser):
@@ -63,7 +65,7 @@ class TikaDocumentParser(DocumentParser):
                             document_path.read_bytes(),
                             mime_type,
                         )
-                    else:  # pragma: nocover
+                    else:  # pragma: no cover
                         raise
         except Exception as err:
             raise ParseError(
@@ -91,11 +93,14 @@ class TikaDocumentParser(DocumentParser):
             timeout=settings.CELERY_TASK_TIME_LIMIT,
         ) as client, client.libre_office.to_pdf() as route:
             # Set the output format of the resulting PDF
-            if settings.OCR_OUTPUT_TYPE in {"pdfa", "pdfa-2"}:
+            if settings.OCR_OUTPUT_TYPE in {
+                OutputTypeChoices.PDF_A,
+                OutputTypeChoices.PDF_A2,
+            }:
                 route.pdf_format(PdfAFormat.A2b)
-            elif settings.OCR_OUTPUT_TYPE == "pdfa-1":
+            elif settings.OCR_OUTPUT_TYPE == OutputTypeChoices.PDF_A1:
                 route.pdf_format(PdfAFormat.A1a)
-            elif settings.OCR_OUTPUT_TYPE == "pdfa-3":
+            elif settings.OCR_OUTPUT_TYPE == OutputTypeChoices.PDF_A3:
                 route.pdf_format(PdfAFormat.A3b)
 
             route.convert(document_path)
@@ -111,3 +116,9 @@ class TikaDocumentParser(DocumentParser):
                 raise ParseError(
                     f"Error while converting document to PDF: {err}",
                 ) from err
+
+    def get_settings(self) -> OutputTypeConfig:
+        """
+        This parser only uses the PDF output type configuration currently
+        """
+        return OutputTypeConfig()