feat: created ltipiisignature model (openedx#32853)

* feat: created ltipiisignature model

openedx/core/djangoapps/agreements/migrations/0002_ltipiisignature.py

@@ -0,0 +1,27 @@
+# Generated by Django 3.2.20 on 2023-08-02 13:59
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+import opaque_keys.edx.django.models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('agreements', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='LTIPIISignature',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('course_key', opaque_keys.edx.django.models.CourseKeyField(db_index=True, max_length=255)),
+                ('lti_tools', models.JSONField()),
+                ('lti_tools_hash', models.IntegerField()),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
+            ],
+        ),
+    ]

openedx/core/djangoapps/agreements/migrations/0003_merge_0002_ltipiisignature_0002_ltipiitool.py

@@ -0,0 +1,14 @@
+# Generated by Django 3.2.20 on 2023-08-03 13:18
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('agreements', '0002_ltipiisignature'),
+        ('agreements', '0002_ltipiitool'),
+    ]
+
+    operations = [
+    ]

openedx/core/djangoapps/agreements/models.py

@@ -34,3 +34,21 @@ class LTIPIITool(models.Model):
 
     class Meta:
         app_label = 'agreements'
+
+
+class LTIPIISignature(models.Model):
+    """
+    This model stores a user's acknowledgement to share PII via LTI tools in a particular course.
+    """
+    user = models.ForeignKey(User, db_index=True, on_delete=models.CASCADE)
+    course_key = CourseKeyField(max_length=255, db_index=True)
+    lti_tools = models.JSONField()
+
+    # lti_tools_hash represents the hash of the list of LTI tools receiving
+    # PII acknowledged by the user. The hash is used to compare user
+    # acknowledgments - which reduces response time and decreases any impact
+    # on unit rendering time.
+    lti_tools_hash = models.IntegerField()
+
+    class Meta:
+        app_label = 'agreements'