Refactoring

* splits ema/models.py into subpackage
* splits konova/models.py into subpackage
* splits user/models.py into subpackage

user/models/user_action.py

@@ -0,0 +1,69 @@
+"""
+Author: Michel Peltriaux
+Organization: Struktur- und Genehmigungsdirektion Nord, Rhineland-Palatinate, Germany
+Contact: michel.peltriaux@sgdnord.rlp.de
+Created on: 15.11.21
+
+"""
+import uuid
+
+from django.contrib.auth.models import User
+from django.db import models
+from django.utils.translation import gettext_lazy as _
+
+
+class UserAction(models.TextChoices):
+    """
+    Defines different possible user actions for UserActionLogEntry
+    """
+    CHECKED = "checked", _("Checked")
+    RECORDED = "recorded", _("Recorded")
+    UNRECORDED = "unrecorded", _("Unrecorded")
+    CREATED = "created", _("Created")
+    EDITED = "edited", _("Edited")
+    DELETED = "deleted", _("Deleted")
+
+
+class UserActionLogEntry(models.Model):
+    """ Wraps a user action log entry
+
+    Can be used for workflow related attributes like checking or recording.
+
+    """
+    id = models.UUIDField(
+        primary_key=True,
+        default=uuid.uuid4,
+    )
+    user = models.ForeignKey(User, related_name='+', on_delete=models.CASCADE, help_text="Performing user")
+    timestamp = models.DateTimeField(auto_now_add=True, help_text="Timestamp of performed action")
+    action = models.CharField(
+        max_length=255,
+        null=True,
+        blank=True,
+        help_text="Short name for performed action - optional",
+        choices=UserAction.choices,
+    )
+    comment = models.CharField(max_length=255, null=True, blank=True, help_text="Additional comment on this entry")
+
+    class Meta:
+        ordering = (
+            "-timestamp",
+        )
+
+    def __str__(self):
+        return "{} | {} | {}".format(self.user.username, self.timestamp, self.action)
+
+    @property
+    def action_humanize(self):
+        """ Returns humanized version of enum
+
+        Used for template rendering
+
+        Returns:
+
+        """
+        choices = UserAction.choices
+        for choice in choices:
+            if choice[0] == self.action:
+                return choice[1]
+        return None