add new daily sms provider volume report

code generally lifted almost exactly from the daily_volumes_report, but
per provider and only for SMS.

tests/app/dao/test_ft_billing_dao.py

@@ -10,6 +10,7 @@ from app.dao.fact_billing_dao import (
     delete_billing_data_for_service_for_day,
     fetch_billing_data_for_day,
     fetch_billing_totals_for_year,
+    fetch_daily_sms_provider_volumes_for_platform,
     fetch_daily_volumes_for_platform,
     fetch_letter_costs_and_totals_for_all_services,
     fetch_letter_line_items_for_all_services,
@@ -856,6 +857,84 @@ def test_fetch_daily_volumes_for_platform(
     assert results[1].letter_sheet_totals == 40
 
 
+def test_fetch_daily_sms_provider_volumes_for_platform_groups_values_by_provider(
+    notify_db_session,
+):
+    services = [
+        create_service(service_name='a'),
+        create_service(service_name='b')
+    ]
+    templates = [
+        create_template(services[0]),
+        create_template(services[1])
+    ]
+
+    create_ft_billing('2022-02-01', templates[0], provider='foo', notifications_sent=1, billable_unit=2)
+    create_ft_billing('2022-02-01', templates[1], provider='foo', notifications_sent=4, billable_unit=8)
+
+    create_ft_billing('2022-02-01', templates[0], provider='bar', notifications_sent=16, billable_unit=32)
+    create_ft_billing('2022-02-01', templates[1], provider='bar', notifications_sent=64, billable_unit=128)
+
+    results = fetch_daily_sms_provider_volumes_for_platform(start_date='2022-02-01', end_date='2022-02-01')
+
+    assert len(results) == 2
+    assert results[0].provider == 'bar'
+    assert results[0].sms_totals == 80
+    assert results[0].sms_fragment_totals == 160
+
+    assert results[1].provider == 'foo'
+    assert results[1].sms_totals == 5
+    assert results[1].sms_fragment_totals == 10
+
+
+def test_fetch_daily_sms_provider_volumes_for_platform_for_platform_calculates_chargeable_units_and_costs(
+    sample_template,
+):
+    create_ft_billing('2022-02-01', sample_template, rate_multiplier=3, rate=1.5, notifications_sent=1, billable_unit=2)
+
+    results = fetch_daily_sms_provider_volumes_for_platform(start_date='2022-02-01', end_date='2022-02-01')
+
+    assert len(results) == 1
+    assert results[0].sms_totals == 1
+    assert results[0].sms_fragment_totals == 2
+    assert results[0].sms_chargeable_units == 6
+    assert results[0].sms_cost == 9
+
+
+def test_fetch_daily_sms_provider_volumes_for_platform_for_platform_searches_dates_inclusively(sample_template):
+    # too early
+    create_ft_billing('2022-02-02', sample_template)
+
+    # just right
+    create_ft_billing('2022-02-03', sample_template)
+    create_ft_billing('2022-02-04', sample_template)
+    create_ft_billing('2022-02-05', sample_template)
+
+    # too late
+    create_ft_billing('2022-02-06', sample_template)
+
+    results = fetch_daily_sms_provider_volumes_for_platform(start_date='2022-02-03', end_date='2022-02-05')
+
+    assert len(results) == 3
+    assert results[0].bst_date == date(2022, 2, 3)
+    assert results[-1].bst_date == date(2022, 2, 5)
+
+
+def test_fetch_daily_sms_provider_volumes_for_platform_for_platform_only_returns_sms(
+    sample_template,
+    sample_email_template,
+    sample_letter_template
+):
+    create_ft_billing('2022-02-01', sample_template, notifications_sent=1)
+    create_ft_billing('2022-02-01', sample_email_template, notifications_sent=2)
+    create_ft_billing('2022-02-01', sample_letter_template, notifications_sent=4)
+
+    results = fetch_daily_sms_provider_volumes_for_platform(start_date='2022-02-01', end_date='2022-02-01')
+
+    assert len(results) == 1
+    assert results[0].sms_totals == 1
+
+
 def test_fetch_volumes_by_service(notify_db_session):
     set_up_usage_data(datetime(2022, 2, 1))