Delete unused aggregate_statistics endpoint

`@service_blueprint.route('/<uuid:service_id>/fragment/aggregate_statistics')`
is not being used anywhere, so has been removed. The `provider_statistics_dao`
can also be removed, since the function this contained was only used for
the endpoint.

app/dao/provider_statistics_dao.py

@@ -1,42 +0,0 @@
-from sqlalchemy import func
-
-from app import db
-from app.dao.date_util import get_financial_year
-from app.models import (
-    NotificationHistory,
-    SMS_TYPE,
-    EMAIL_TYPE,
-    NOTIFICATION_STATUS_TYPES_BILLABLE,
-    KEY_TYPE_TEST
-)
-
-
-def get_fragment_count(service_id, year=None):
-    shared_filters = [
-        NotificationHistory.service_id == service_id,
-        NotificationHistory.status.in_(NOTIFICATION_STATUS_TYPES_BILLABLE),
-        NotificationHistory.key_type != KEY_TYPE_TEST
-    ]
-
-    if year:
-        shared_filters.append(NotificationHistory.created_at.between(
-            *get_financial_year(year)
-        ))
-
-    sms_count = db.session.query(
-        func.sum(NotificationHistory.billable_units)
-    ).filter(
-        NotificationHistory.notification_type == SMS_TYPE,
-        *shared_filters
-    )
-
-    email_count = db.session.query(
-        func.count(NotificationHistory.id)
-    ).filter(
-        NotificationHistory.notification_type == EMAIL_TYPE,
-        *shared_filters
-    )
-    return {
-        'sms_count': int(sms_count.scalar() or 0),
-        'email_count': email_count.scalar() or 0
-    }

app/service/rest.py

@@ -65,7 +65,6 @@ from app.dao.service_letter_contact_dao import (
     add_letter_contact_for_service,
     update_letter_contact
 )
-from app.dao.provider_statistics_dao import get_fragment_count
 from app.dao.users_dao import get_user_by_id
 from app.errors import (
     InvalidRequest,
@@ -299,17 +298,6 @@ def remove_user_from_service(service_id, user_id):
     return jsonify({}), 204
 
 
-@service_blueprint.route('/<uuid:service_id>/fragment/aggregate_statistics')
-def get_service_provider_aggregate_statistics(service_id):
-    year = request.args.get('year')
-    if year is not None:
-        try:
-            year = int(year)
-        except ValueError:
-            raise InvalidRequest('Year must be a number', status_code=400)
-    return jsonify(data=get_fragment_count(service_id, year=year))
-
-
 # This is placeholder get method until more thought
 # goes into how we want to fetch and view various items in history
 # tables. This is so product owner can pass stories as done

tests/app/dao/test_provider_statistics_dao.py

@@ -1,90 +0,0 @@
-from datetime import datetime
-import uuid
-
-import pytest
-from freezegun import freeze_time
-
-from app.models import (
-    NotificationHistory, KEY_TYPE_NORMAL, KEY_TYPE_TEAM, KEY_TYPE_TEST,
-    NOTIFICATION_STATUS_TYPES_BILLABLE
-)
-from app.dao.provider_statistics_dao import get_fragment_count
-
-
-def test_get_fragment_count_with_no_data(sample_template):
-    assert get_fragment_count(sample_template.service_id)['sms_count'] == 0
-    assert get_fragment_count(sample_template.service_id)['email_count'] == 0
-
-
-def test_get_fragment_count_separates_sms_and_email(notify_db, sample_template, sample_email_template):
-    noti_hist(notify_db, sample_template)
-    noti_hist(notify_db, sample_template)
-    noti_hist(notify_db, sample_email_template)
-    assert get_fragment_count(sample_template.service_id) == {
-        'sms_count': 2,
-        'email_count': 1
-    }
-
-
-def test_get_fragment_count_filters_on_status(notify_db, sample_template):
-    for status in NOTIFICATION_STATUS_TYPES_BILLABLE:
-        noti_hist(notify_db, sample_template, status=status)
-    # sending, sent, delivered, failed, temporary-failure, permanent-failure
-    assert get_fragment_count(sample_template.service_id)['sms_count'] == 6
-
-
-def test_get_fragment_count_filters_on_service_id(notify_db, sample_template, service_factory):
-    service_2 = service_factory.get('service 2', email_from='service.2')
-    noti_hist(notify_db, sample_template)
-    assert get_fragment_count(service_2.id)['sms_count'] == 0
-
-
-@pytest.mark.parametrize('creation_time, expected_count', [
-    ('2000-03-31 22:59:59', 0),  # before the start of the year
-    ('2000-04-01 00:00:00', 1),  # after the start of the year
-    ('2001-03-31 22:59:59', 1),  # before the end of the year
-    ('2001-04-01 00:00:00', 0),  # after the end of the year
-])
-def test_get_fragment_count_filters_on_year(
-    notify_db, sample_template, creation_time, expected_count
-):
-    with freeze_time(creation_time):
-        noti_hist(notify_db, sample_template)
-    assert get_fragment_count(sample_template.service_id, year=2000)['sms_count'] == expected_count
-
-
-def test_get_fragment_count_sums_billable_units_for_sms(notify_db, sample_template):
-    noti_hist(notify_db, sample_template, billable_units=1)
-    noti_hist(notify_db, sample_template, billable_units=2)
-    assert get_fragment_count(sample_template.service_id)['sms_count'] == 3
-
-
-@pytest.mark.parametrize('key_type,sms_count', [
-    (KEY_TYPE_NORMAL, 1),
-    (KEY_TYPE_TEAM, 1),
-    (KEY_TYPE_TEST, 0),
-])
-def test_get_fragment_count_ignores_test_api_keys(notify_db, sample_template, key_type, sms_count):
-    noti_hist(notify_db, sample_template, key_type=key_type)
-    assert get_fragment_count(sample_template.service_id)['sms_count'] == sms_count
-
-
-def noti_hist(notify_db, template, status='delivered', billable_units=None, key_type=KEY_TYPE_NORMAL):
-    if not billable_units and template.template_type == 'sms':
-        billable_units = 1
-
-    notification_history = NotificationHistory(
-        id=uuid.uuid4(),
-        service=template.service,
-        template_id=template.id,
-        template_version=template.version,
-        status=status,
-        created_at=datetime.utcnow(),
-        billable_units=billable_units,
-        notification_type=template.template_type,
-        key_type=key_type
-    )
-    notify_db.session.add(notification_history)
-    notify_db.session.commit()
-
-    return notification_history

tests/app/service/test_rest.py

@@ -1678,26 +1678,6 @@ def test_get_detailed_services_for_date_range(notify_db, notify_db_session, set_
     }
 
 
-@pytest.mark.parametrize('query_string, expected_status, expected_json', [
-    ('', 200, {'data': {'email_count': 0, 'sms_count': 0}}),
-    ('?year=2000', 200, {'data': {'email_count': 0, 'sms_count': 0}}),
-    ('?year=abcd', 400, {'message': 'Year must be a number', 'result': 'error'}),
-])
-def test_get_service_provider_aggregate_statistics(
-        client,
-        sample_service,
-        query_string,
-        expected_status,
-        expected_json,
-):
-    response = client.get(
-        '/service/{}/fragment/aggregate_statistics{}'.format(sample_service.id, query_string),
-        headers=[create_authorization_header()]
-    )
-    assert response.status_code == expected_status
-    assert json.loads(response.get_data(as_text=True)) == expected_json
-
-
 @freeze_time('2017-11-11 02:00')
 def test_get_template_usage_by_month_returns_correct_data(
         notify_db,