Add database table and migration for regions

frigate/models.py

@@ -57,6 +57,12 @@ class Timeline(Model):  # type: ignore[misc]
     data = JSONField()  # ex: tracked object id, region, box, etc.
 
 
+class Regions(Model):  # type: ignore[misc]
+    camera = CharField(null=False, primary_key=True, max_length=20)
+    grid = JSONField()  # json blob of grid
+    last_update = DateTimeField()
+
+
 class Recordings(Model):  # type: ignore[misc]
     id = CharField(null=False, primary_key=True, max_length=30)
     camera = CharField(index=True, max_length=20)

migrations/019_create_regions_table.py

@@ -0,0 +1,35 @@
+"""Peewee migrations -- 019_create_regions_table.py.
+
+Some examples (model - class or model name)::
+
+    > Model = migrator.orm['model_name']            # Return model in current state by name
+
+    > migrator.sql(sql)                             # Run custom SQL
+    > migrator.python(func, *args, **kwargs)        # Run python code
+    > migrator.create_model(Model)                  # Create a model (could be used as decorator)
+    > migrator.remove_model(model, cascade=True)    # Remove a model
+    > migrator.add_fields(model, **fields)          # Add fields to a model
+    > migrator.change_fields(model, **fields)       # Change fields
+    > migrator.remove_fields(model, *field_names, cascade=True)
+    > migrator.rename_field(model, old_field_name, new_field_name)
+    > migrator.rename_table(model, new_table_name)
+    > migrator.add_index(model, *col_names, unique=False)
+    > migrator.drop_index(model, *col_names)
+    > migrator.add_not_null(model, *field_names)
+    > migrator.drop_not_null(model, *field_names)
+    > migrator.add_default(model, field_name, default)
+
+"""
+import peewee as pw
+
+SQL = pw.SQL
+
+
+def migrate(migrator, database, fake=False, **kwargs):
+    migrator.sql(
+        'CREATE TABLE IF NOT EXISTS "regions" ("camera" VARCHAR(20) NOT NULL PRIMARY KEY, "last_updated" DATETIME NOT NULL, "grid" JSON)'
+    )
+
+
+def rollback(migrator, database, fake=False, **kwargs):
+    pass