Add new generic model for scheduled contact events like session timeo…

…uts etc

temba/contacts/migrations/0199_contactfire.py

@@ -0,0 +1,43 @@
+# Generated by Django 5.1.4 on 2025-01-17 14:24
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("contacts", "0198_squashed"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="ContactFire",
+            fields=[
+                ("id", models.BigAutoField(auto_created=True, primary_key=True, serialize=False)),
+                (
+                    "fire_type",
+                    models.CharField(choices=[("E", "Expiration"), ("T", "Timeout"), ("C", "Campaign")], max_length=1),
+                ),
+                ("scope", models.CharField(max_length=64)),
+                ("when", models.DateTimeField(db_index=True)),
+                ("extra", models.JSONField(default=dict)),
+                (
+                    "contact",
+                    models.ForeignKey(
+                        db_index=False,
+                        on_delete=django.db.models.deletion.PROTECT,
+                        related_name="fires",
+                        to="contacts.contact",
+                    ),
+                ),
+            ],
+            options={
+                "constraints": [
+                    models.UniqueConstraint(
+                        fields=("contact", "fire_type", "scope"), name="fire_contact_type_scope_unique"
+                    )
+                ],
+            },
+        ),
+    ]

temba/contacts/models.py

@@ -1734,6 +1734,32 @@ class Meta:
         ]
 
 
+class ContactFire(models.Model):
+    """
+    Something to happen to a contact in the future - processed by mailroom.
+    """
+
+    TYPE_WAIT_EXPIRATION = "E"
+    TYPE_WAIT_TIMEOUT = "T"
+    TYPE_CAMPAIGN = "C"
+    TYPE_CHOICES = ((TYPE_WAIT_EXPIRATION, "Expiration"), (TYPE_WAIT_TIMEOUT, "Timeout"), (TYPE_CAMPAIGN, "Campaign"))
+
+    id = models.BigAutoField(auto_created=True, primary_key=True)
+    contact = models.ForeignKey(  # indexed below
+        "contacts.Contact", on_delete=models.PROTECT, related_name="fires", db_index=False
+    )
+    fire_type = models.CharField(max_length=1, choices=TYPE_CHOICES)
+    scope = models.CharField(max_length=64)  # e.g. campaign event id
+    when = models.DateTimeField(db_index=True)
+    extra = models.JSONField(default=dict)
+
+    class Meta:
+        constraints = [
+            # used to prevent adding duplicate fires for the same contact and scope
+            models.UniqueConstraint(name="fire_contact_type_scope_unique", fields=("contact", "fire_type", "scope"))
+        ]
+
+
 class ContactExport(ExportType):
     """
     Export of contacts