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_mail/mail.py

@@ -92,7 +92,7 @@ class BaseMailAction:
         M: MailBox,
         message_uid: str,
         parameter: str,
-    ):  # pragma: nocover
+    ):  # pragma: no cover
         """
         Perform mail action on the given mail uid in the mailbox.
         """
@@ -171,7 +171,7 @@ class TagMailAction(BaseMailAction):
                 return AND(NOT(gmail_label=self.keyword), no_keyword=self.keyword)
             else:
                 return {"no_keyword": self.keyword}
-        else:  # pragma: nocover
+        else:  # pragma: no cover
             raise ValueError("This should never happen.")
 
     def post_consume(self, M: MailBox, message_uid: str, parameter: str):
@@ -361,7 +361,7 @@ def get_rule_action(rule: MailRule, supports_gmail_labels: bool) -> BaseMailActi
     elif rule.action == MailRule.MailAction.TAG:
         return TagMailAction(rule.action_parameter, supports_gmail_labels)
     else:
-        raise NotImplementedError("Unknown action.")  # pragma: nocover
+        raise NotImplementedError("Unknown action.")  # pragma: no cover
 
 
 def make_criterias(rule: MailRule, supports_gmail_labels: bool):
@@ -397,7 +397,7 @@ def get_mailbox(server, port, security) -> MailBox:
     Returns the correct MailBox instance for the given configuration.
     """
     ssl_context = ssl.create_default_context()
-    if settings.EMAIL_CERTIFICATE_FILE is not None:  # pragma: nocover
+    if settings.EMAIL_CERTIFICATE_FILE is not None:  # pragma: no cover
         ssl_context.load_verify_locations(cafile=settings.EMAIL_CERTIFICATE_FILE)
 
     if security == MailAccount.ImapSecurity.NONE:
@@ -407,7 +407,7 @@ def get_mailbox(server, port, security) -> MailBox:
     elif security == MailAccount.ImapSecurity.SSL:
         mailbox = MailBox(server, port, ssl_context=ssl_context)
     else:
-        raise NotImplementedError("Unknown IMAP security")  # pragma: nocover
+        raise NotImplementedError("Unknown IMAP security")  # pragma: no cover
     return mailbox
 
 
@@ -450,7 +450,7 @@ class MailAccountHandler(LoggingMixin):
         else:
             raise NotImplementedError(
                 "Unknown title selector.",
-            )  # pragma: nocover
+            )  # pragma: no cover
 
     def _get_correspondent(
         self,
@@ -478,7 +478,7 @@ class MailAccountHandler(LoggingMixin):
         else:
             raise NotImplementedError(
                 "Unknown correspondent selector",
-            )  # pragma: nocover
+            )  # pragma: no cover
 
     def handle_mail_account(self, account: MailAccount):
         """

src/paperless_mail/parsers.py

@@ -405,3 +405,9 @@ class MailDocumentParser(DocumentParser):
         html_pdf = tempdir / "html.pdf"
         html_pdf.write_bytes(response.content)
         return html_pdf
+
+    def get_settings(self):
+        """
+        This parser does not implement additional settings yet
+        """
+        return None