Feature: OAuth2 Gmail and Outlook email support (#7866)

src/paperless_mail/models.py

@@ -15,6 +15,11 @@ class MailAccount(document_models.ModelWithOwner):
         SSL = 2, _("Use SSL")
         STARTTLS = 3, _("Use STARTTLS")
 
+    class MailAccountType(models.IntegerChoices):
+        IMAP = 1, _("IMAP")
+        GMAIL_OAUTH = 2, _("Gmail OAuth")
+        OUTLOOK_OAUTH = 3, _("Outlook OAuth")
+
     name = models.CharField(_("name"), max_length=256, unique=True)
 
     imap_server = models.CharField(_("IMAP server"), max_length=256)
@@ -51,6 +56,31 @@ class MailAccount(document_models.ModelWithOwner):
         ),
     )
 
+    account_type = models.PositiveIntegerField(
+        _("account type"),
+        choices=MailAccountType.choices,
+        default=MailAccountType.IMAP,
+    )
+
+    refresh_token = models.CharField(
+        _("refresh token"),
+        max_length=2048,
+        blank=True,
+        null=True,
+        help_text=_(
+            "The refresh token to use for token authentication e.g. with oauth2.",
+        ),
+    )
+
+    expiration = models.DateTimeField(
+        _("expiration"),
+        blank=True,
+        null=True,
+        help_text=_(
+            "The expiration date of the refresh token. ",
+        ),
+    )
+
     def __str__(self):
         return self.name