Update linters formatters and supported versions

.github/workflows/run-tests.yml

@@ -13,7 +13,13 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13.0-rc.1"]
+        django-version: ["django==4.2.*", "django==5.0.*", "django==5.1.*", "django==5.2.*"]
+        exclude:
+          - python-version: "3.12"
+            django-version: "django<4.2.8"
+          - python-version: "3.13.0-rc.1"
+            django-version: "django<5.2"
     steps:
       - uses: actions/checkout@v3
       - name: Set up Python ${{ matrix.python-version }}
@@ -24,11 +30,9 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install -r requirements_test.txt
-      - name: Lint with flake8
+      - name: Lint with ruff
         run: |
           # stop the build if there are Python syntax errors or undefined names
-          flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
-          # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-          flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+          make ruff-check
       - name: Run Tox
         run: tox

Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.7-buster AS dev
+FROM python:3.8-bookworm AS dev
 # Dockerfile for running a test django installation
 LABEL maintainer="Justin Michalicek <jmichalicek@gmail.com>"
 ENV PYTHONUNBUFFERED 1
@@ -8,7 +8,6 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update && DEBIAN_FRONTEND=noninteract
   software-properties-common \
   sudo \
   vim \
-  telnet \
   postgresql-client \
   && apt-get autoremove && apt-get clean
 

Makefile

@@ -72,6 +72,7 @@ setup-and-run:	setup migrate run
 
 venv:
 	 python -m venv .venv
+	 pip install --upgrade pip wheel setuptools
 
 run:
 	python manage.py runserver 0.0.0.0:8000
@@ -81,8 +82,21 @@ migrate:
 
 dev:
 	docker compose run --service-ports django /bin/bash
+
 shell:
 	docker compose exec django /bin/bash
 
 install-mailviewer:
 	pip install -e /django/mailviewer --no-binary :all:
+
+black:
+	black django_mail_viewer tests test_project
+
+black-check:
+	black --check --diff django_mail_viewer tests test_project
+
+ruff:
+	ruff check django_mail_viewer --fix
+
+ruff-check:
+	ruff check django_mail_viewer

django_mail_viewer/apps.py

@@ -2,5 +2,5 @@
 
 
 class DjangoMailViewerConfig(AppConfig):
-    name = 'django_mail_viewer'
+    name = "django_mail_viewer"
     verbose_name = "Django Mail Viewer"

django_mail_viewer/backends/cache.py

@@ -1,6 +1,7 @@
 """
 Backend for test environment.
 """
+
 from contextlib import contextmanager
 from os import getpid
 from time import monotonic, sleep
@@ -27,14 +28,14 @@ def __init__(self, *args, **kwargs):
         # This is for get_outbox() so that the system knows which cache keys are there
         # to retrieve them. Django does not have a built in way to get the keys
         # which exist in the cache.
-        self.cache_keys_key = 'message_keys'
-        self.cache_keys_lock_key = 'message_keys_lock'
+        self.cache_keys_key = "message_keys"
+        self.cache_keys_lock_key = "message_keys_lock"
 
     def send_messages(self, messages):
         msg_count = 0
         for message in messages:
             m = message.message()
-            message_id = m.get('message-id')
+            message_id = m.get("message-id")
             self.cache.set(message_id, m)
 
             # Use a lock key and spinlock
@@ -57,7 +58,7 @@ def send_messages(self, messages):
                         msg_count += 1
                         is_stored = True
                     else:
-                        sleep(.01)
+                        sleep(0.01)
         return msg_count
 
     def get_message(self, lookup_id):

django_mail_viewer/backends/database/admin.py

@@ -4,9 +4,9 @@
 
 
 class EmailMessageAdmin(admin.ModelAdmin):
-    list_display = ('pk', 'parent', 'message_id', 'created_at', 'updated_at')
-    search_fields = ('pk', 'message_id', 'message_headers')
-    readonly_fields = ('created_at', 'updated_at')
+    list_display = ("pk", "parent", "message_id", "created_at", "updated_at")
+    search_fields = ("pk", "message_id", "message_headers")
+    readonly_fields = ("created_at", "updated_at")
 
 
 admin.site.register(EmailMessage, EmailMessageAdmin)

django_mail_viewer/backends/database/apps.py

@@ -3,7 +3,7 @@
 
 
 class DatabaseBackendConfig(AppConfig):
-    label = 'mail_viewer_database_backend'
-    name = 'django_mail_viewer.backends.database'
+    label = "mail_viewer_database_backend"
+    name = "django_mail_viewer.backends.database"
     # May want to change this verbose_name
     verbose_name = _("Database Backend")

django_mail_viewer/backends/database/backend.py

@@ -62,9 +62,9 @@ def _parse_email_attachment(self, message, decode_file=True):
                     elif name == "read-date":
                         attachment.read_date = value  # TODO: datetime
                 return {
-                    'filename': Path(message.get_filename()).name,
-                    'content_type': message.get_content_type(),
-                    'file': attachment,
+                    "filename": Path(message.get_filename()).name,
+                    "content_type": message.get_content_type(),
+                    "file": attachment,
                 }
         return None
 
@@ -76,30 +76,30 @@ def send_messages(self, messages):
             if message.is_multipart():
                 # TODO: Should this really be done recursively? I believe forwarded emails may
                 # have multiple layers of parts/dispositions
-                message_id = message.get('message-id')
+                message_id = message.get("message-id")
                 main_message = None
                 for i, part in enumerate(message.walk()):
                     content_type = part.get_content_type()
-                    charset = part.get_param('charset')
+                    charset = part.get_param("charset")
                     # handle attachments - probably need to look at SingleEmailMixin._parse_email_attachment()
                     # and make that more reusable
                     content_disposition = part.get("Content-Disposition", None)
                     if content_disposition:
                         # attachment_data = part.get_payload(decode=True)
                         attachment_data = self._parse_email_attachment(part)
                         file_attachment = ContentFile(
-                            attachment_data.get('file').read(), name=attachment_data.get('filename', 'attachment')
+                            attachment_data.get("file").read(), name=attachment_data.get("filename", "attachment")
                         )
-                        content = ''
-                    elif content_type in ['text/plain', 'text/html']:
-                        content = part.get_payload(decode=True).decode(charset, errors='replace')
-                        file_attachment = ''
+                        content = ""
+                    elif content_type in ["text/plain", "text/html"]:
+                        content = part.get_payload(decode=True).decode(charset, errors="replace")
+                        file_attachment = ""
                     else:
                         # the main multipart/alternative message for multipart messages has no content/payload
                         # TODO: handle file attachments
-                        content = ''
-                        file_attachment = ''
-                    message_id = part.get('message-id', '')  # do sub-parts have a message-id?
+                        content = ""
+                        file_attachment = ""
+                    message_id = part.get("message-id", "")  # do sub-parts have a message-id?
                     p = self._backend_model(
                         message_id=message_id,
                         content=content,
@@ -111,7 +111,7 @@ def send_messages(self, messages):
                     if i == 0:
                         main_message = p
             else:
-                message_id = message.get('message-id')
+                message_id = message.get("message-id")
                 main_message = self._backend_model(
                     message_id=message_id,
                     content=message.get_payload(),

django_mail_viewer/backends/database/models.py

@@ -19,13 +19,13 @@ class AbstractBaseEmailMessage(models.Model):
     # Technically optional, but really should be there according to RFC 5322 section 3.6.4
     # and Django always creates the message_id on the main part of the message so we know
     # it will be there, but not for all sub-parts of a multi-part message
-    message_id = models.CharField(max_length=250, blank=True, default='')
+    message_id = models.CharField(max_length=250, blank=True, default="")
     # Would love to make message_headers be a JSONField, but do not want to tie this to
     # postgres only.
     message_headers = models.TextField()
-    content = models.TextField(blank=True, default='')
+    content = models.TextField(blank=True, default="")
     parent = models.ForeignKey(
-        'self', blank=True, null=True, default=None, related_name='parts', on_delete=models.CASCADE
+        "self", blank=True, null=True, default=None, related_name="parts", on_delete=models.CASCADE
     )
     created_at = models.DateTimeField(auto_now_add=True)
     updated_at = models.DateTimeField(auto_now=True)
@@ -38,8 +38,8 @@ def __init__(self, *args, **kwargs):
 
         # methods here expect the concrete subclasses to implement the file_attachment field
         # should only be necessary until django 2.2 support is dropped... I hope
-        if TYPE_CHECKING and not hasattr(self, 'file_attachment'):
-            self.file_attachment = models.FileField(blank=True, default='', upload_to='mailviewer_attachments')
+        if TYPE_CHECKING and not hasattr(self, "file_attachment"):
+            self.file_attachment = models.FileField(blank=True, default="", upload_to="mailviewer_attachments")
 
     # I really only need/use get_filename(), get_content_type(), get_payload(), walk()
     # returns Any due to failobj
@@ -59,14 +59,14 @@ def get(self, attr: str, failobj: Any = None) -> Any:
         return failobj
 
     def date(self) -> str:
-        return self.get('date')
+        return self.get("date")
 
     def is_multipart(self) -> bool:
         """
         Returns True if the message is multipart
         """
         # Not certain the self.parts.all() is accurate
-        return self.get_content_type() == 'rfc/822' or self.parts.exists()  # type: ignore
+        return self.get_content_type() == "rfc/822" or self.parts.exists()  # type: ignore
 
     def headers(self) -> Dict[str, str]:
         """
@@ -81,13 +81,13 @@ def values(self) -> Dict[str, str]:
         # not sure this is right...
         return self.headers()
 
-    def walk(self) -> 'Union[models.QuerySet[AbstractBaseEmailMessage], List[AbstractBaseEmailMessage]]':
+    def walk(self) -> "Union[models.QuerySet[AbstractBaseEmailMessage], List[AbstractBaseEmailMessage]]":
         if not self.parts.all().exists():  # type: ignore
             # Or should I be saving a main message all the time and even just a plaintext has a child part, hmm
             return [self]
-        return self.parts.all().order_by('-created_at', 'id')  # type: ignore
+        return self.parts.all().order_by("-created_at", "id")  # type: ignore
 
-    def get_param(self, param: str, failobj=None, header: str = 'content-type', unquote: bool = True) -> str:
+    def get_param(self, param: str, failobj=None, header: str = "content-type", unquote: bool = True) -> str:
         """
         Return the value of the Content-Type header’s parameter param as a string. If the message has no Content-Type header or if there is no such parameter, then failobj is returned (defaults to None).
 
@@ -97,24 +97,24 @@ def get_param(self, param: str, failobj=None, header: str = 'content-type', unqu
         # TODO: error handling skipped for sure here... need to see what the real email message does
         # Should also consider using cgi.parse_header
         h = self.get(header)
-        params = h.split(';')
+        params = h.split(";")
         for part in params[1:]:
-            part_name, part_val = part.split('=')
+            part_name, part_val = part.split("=")
             part_name = part_name.strip()
             part_val = part_val.strip()
             if part_name == param:
                 return part_val
-        return ''
+        return ""
 
     def get_payload(
         self, i: Union[int, None] = None, decode: bool = False
-    ) -> 'Union[bytes, AbstractBaseEmailMessage, models.QuerySet[AbstractBaseEmailMessage]]':
+    ) -> "Union[bytes, AbstractBaseEmailMessage, models.QuerySet[AbstractBaseEmailMessage]]":
         """
         Temporary backwards compatibility with email.message.Message
         """
         # TODO: sort out type hint for return value here. Maybe use monkeytype to figure this out.
         if not self.is_multipart():
-            charset = self.get_param('charset')
+            charset = self.get_param("charset")
             if self.file_attachment:
                 self.file_attachment.seek(0)
                 try:
@@ -134,18 +134,18 @@ def get_content_type(self) -> str:
         """
         Return's the message's content-type or mime type.
         """
-        h = self.get('content-type')
-        params = h.split(';')
+        h = self.get("content-type")
+        params = h.split(";")
         return params[0]
 
     def get_filename(self, failobj=None) -> str:
-        content_disposition = self.headers().get('Content-Disposition', '')
-        parts = content_disposition.split(';')
+        content_disposition = self.headers().get("Content-Disposition", "")
+        parts = content_disposition.split(";")
         for part in parts:
-            if part.strip().startswith('filename'):
-                filename = part.split('=')[1].strip('"').strip()
+            if part.strip().startswith("filename"):
+                filename = part.split("=")[1].strip('"').strip()
                 return email.utils.unquote(filename)
-        return ''
+        return ""
 
 
 class EmailMessage(AbstractBaseEmailMessage):
@@ -160,9 +160,9 @@ class EmailMessage(AbstractBaseEmailMessage):
     it just needs to be stored elsewhere, such as locally, or a different s3 bucket than the default storage.
     """
 
-    file_attachment = models.FileField(blank=True, default='', upload_to='mailviewer_attachments')
+    file_attachment = models.FileField(blank=True, default="", upload_to="mailviewer_attachments")
 
     class Meta:
-        db_table = 'mail_viewer_emailmessage'
-        ordering = ('id',)
-        indexes = [models.Index(fields=['message_id'])]
+        db_table = "mail_viewer_emailmessage"
+        ordering = ("id",)
+        indexes = [models.Index(fields=["message_id"])]

django_mail_viewer/backends/locmem.py

@@ -1,6 +1,7 @@
 """
 Backend for test environment.
 """
+
 from django.core import mail
 from django.core.mail.backends.base import BaseEmailBackend
 
@@ -18,7 +19,7 @@ class EmailBackend(BaseEmailBackend):
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
-        if not hasattr(mail, 'outbox'):
+        if not hasattr(mail, "outbox"):
             mail.outbox = []
 
     def send_messages(self, messages):
@@ -38,7 +39,7 @@ def get_message(self, lookup_id):
             # differently than the expected Message-ID,  which is suppored by
             # EmailMessage.message(), then we can't just access the key directly.  Instead iterate
             # over the keys and vls
-            if message.get('message-id') == lookup_id:
+            if message.get("message-id") == lookup_id:
                 return message
         return None
 
@@ -47,16 +48,16 @@ def get_outbox(self, *args, **kwargs):
         Get the outbox used by this backend.  This backend returns a copy of mail.outbox.
         May add pagination args/kwargs.
         """
-        return getattr(mail, 'outbox', [])[:]
+        return getattr(mail, "outbox", [])[:]
 
     def delete_message(self, message_id: str):
         """
         Remove the message with the given id from the mailbox
         """
-        outbox = getattr(mail, 'outbox', [])
+        outbox = getattr(mail, "outbox", [])
         index_to_remove = None
         for idx, message in enumerate(outbox):
-            if message.get('message-id') == message_id:
+            if message.get("message-id") == message_id:
                 index_to_remove = idx
                 break
         if index_to_remove is not None:

django_mail_viewer/settings.py

@@ -2,5 +2,7 @@
 
 # The cache config from django.core.cache.caches to use for backends.cache.CacheBackend
 # default to django.core.cache.caches['default']
-MAILVIEWER_CACHE = getattr(settings, 'MAILVIEWER_CACHE', 'default')
-MAILVIEWER_DATABASE_BACKEND_MODEL = getattr(settings, 'MAILVIEWER_DATABASE_BACKEND_MODEL', 'mail_viewer_database_backend.EmailMessage')
+MAILVIEWER_CACHE = getattr(settings, "MAILVIEWER_CACHE", "default")
+MAILVIEWER_DATABASE_BACKEND_MODEL = getattr(
+    settings, "MAILVIEWER_DATABASE_BACKEND_MODEL", "mail_viewer_database_backend.EmailMessage"
+)