Improve automatic emails with temporary urls

This MR targets the improvement for automatic emails concerning validation of new users by supervisors/re-validation of users.

Fixes #542 (closed)

Fixes #550 (closed)

beat/web/accounts/models.py

@@ -29,9 +29,18 @@ from django.db import models
 from django.contrib.auth.models import User
 from django.db.models.signals import post_save
 from django.dispatch import receiver
+from django.conf import settings
 
 import random
 import string
+import datetime
+
+# ------------------------------------------------------------------------------
+# Constants
+
+TEMPORARY_URL_LENGTH = 32
+
+# ------------------------------------------------------------------------------
 
 
 class AccountSettingsManager(models.Manager):
@@ -149,3 +158,64 @@ def create_user_profile(sender, instance, created, **kwargs):
 def save_user_profile(sender, instance, **kwargs):
     player, created = Profile.objects.get_or_create(user=instance)
     instance.profile.save()
+
+
+def generate_url_hash():
+    # url_hash creation
+    url_hash = "".join(
+        random.choice(string.ascii_letters + string.digits)  # nosec
+        for _ in range(TEMPORARY_URL_LENGTH)
+    )
+    return url_hash
+
+
+class TemporaryUrlManager(models.Manager):
+    def create_temporary_url(self, status, supervision_track):
+        # Actions that result creating the object
+
+        url_hash = generate_url_hash()
+        used_hashes = [x.url_hash for x in TemporaryUrl.objects.all()]
+        while url_hash in used_hashes:
+            url_hash = generate_url_hash()
+
+        now = datetime.datetime.now()
+        expiration_date_delta = datetime.timedelta(
+            days=settings.ACCOUNT_ACTIVATION_DAYS_FROM_SUPERVISOR
+        )
+        expires = now + expiration_date_delta
+
+        temporary_url = self.model(
+            status=status,
+            url_hash=url_hash,
+            expires=expires,
+            supervision_track=supervision_track,
+        )
+        temporary_url.save()
+        return temporary_url
+
+
+class TemporaryUrl(models.Model):
+    # _____ Constants __________
+
+    # Supervisor validates supervisee
+    # Self yearly revalidation from supervisee
+    VALIDATION = "V"
+    YEARREVALIDATION = "Y"
+    REJECTION = "R"
+
+    URL_STATUS = (
+        (VALIDATION, "Supervisor validates supervisee"),
+        (YEARREVALIDATION, "Self yearly revalidation from supervisee"),
+        (REJECTION, "Supervisor rejects supervisee revalidation"),
+    )
+
+    # _____ Fields __________
+
+    status = models.CharField(max_length=1, choices=URL_STATUS, default=VALIDATION)
+    url_hash = models.CharField("Url", blank=False, max_length=32, unique=True)
+    expires = models.DateTimeField("Expires")
+    supervision_track = models.ForeignKey(
+        SupervisionTrack, on_delete=models.CASCADE, related_name="supervisees"
+    )
+
+    objects = TemporaryUrlManager()