Create a new query for template monthly stats.

app/dao/fact_notification_status_dao.py

@@ -4,12 +4,12 @@ from flask import current_app
 from notifications_utils.timezones import convert_bst_to_utc
 from sqlalchemy import func
 from sqlalchemy.dialects.postgresql import insert
-from sqlalchemy.sql.expression import literal
+from sqlalchemy.sql.expression import literal, extract
 from sqlalchemy.types import DateTime, Integer
 
 from app import db
-from app.models import Notification, NotificationHistory, FactNotificationStatus, KEY_TYPE_TEST, Service
-from app.utils import get_london_midnight_in_utc, midnight_n_days_ago
+from app.models import Notification, NotificationHistory, FactNotificationStatus, KEY_TYPE_TEST, Service, Template
+from app.utils import get_london_midnight_in_utc, midnight_n_days_ago, get_london_month_from_utc_column
 
 
 def fetch_notification_status_for_day(process_day, service_id=None):
@@ -291,3 +291,81 @@ def fetch_stats_for_all_services_by_date_range(start_date, end_date, include_fro
     else:
         query = stats
     return query.all()
+
+
+def fetch_monthly_template_usage_for_service(start_date, end_date, service_id):
+    # services_dao.replaces dao_fetch_monthly_historical_usage_by_template_for_service
+    stats = db.session.query(
+        FactNotificationStatus.template_id.label('template_id'),
+        Template.name.label('name'),
+        Template.template_type.label('template_type'),
+        Template.is_precompiled_letter.label('is_precompiled_letter'),
+        extract('month', FactNotificationStatus.bst_date).label('month'),
+        extract('year', FactNotificationStatus.bst_date).label('year'),
+        func.sum(FactNotificationStatus.notification_count).label('count')
+    ).join(
+        Template, FactNotificationStatus.template_id == Template.id
+    ).filter(
+        FactNotificationStatus.service_id == service_id,
+        FactNotificationStatus.bst_date >= start_date,
+        FactNotificationStatus.bst_date <= end_date,
+    ).group_by(
+        FactNotificationStatus.template_id,
+        Template.name,
+        Template.template_type,
+        Template.is_precompiled_letter,
+        extract('month', FactNotificationStatus.bst_date).label('month'),
+        extract('year', FactNotificationStatus.bst_date).label('year'),
+    )
+
+    if start_date <= datetime.utcnow() <= end_date:
+        today = get_london_midnight_in_utc(datetime.utcnow())
+        month = get_london_month_from_utc_column(Notification.created_at)
+
+        stats_for_today = db.session.query(
+            Notification.template_id.label('template_id'),
+            Template.name.label('name'),
+            Template.template_type.label('template_type'),
+            Template.is_precompiled_letter.label('is_precompiled_letter'),
+            extract('month', month).label('month'),
+            extract('year', month).label('year'),
+            func.count().label('count')
+        ).join(
+            Template, Notification.template_id == Template.id,
+        ).filter(
+            Notification.created_at >= today,
+            Notification.service_id == service_id,
+            # we don't want to include test keys
+            Notification.key_type != KEY_TYPE_TEST
+        ).group_by(
+            Notification.template_id,
+            Template.hidden,
+            Template.name,
+            Template.template_type,
+            month
+        )
+
+        all_stats_table = stats.union_all(stats_for_today).subquery()
+        query = db.session.query(
+            all_stats_table.c.template_id,
+            all_stats_table.c.name,
+            all_stats_table.c.is_precompiled_letter,
+            all_stats_table.c.template_type,
+            all_stats_table.c.month,
+            all_stats_table.c.year,
+            func.cast(func.sum(all_stats_table.c.count), Integer).label('count'),
+        ).group_by(
+            all_stats_table.c.template_id,
+            all_stats_table.c.name,
+            all_stats_table.c.is_precompiled_letter,
+            all_stats_table.c.template_type,
+            all_stats_table.c.month,
+            all_stats_table.c.year,
+        ).order_by(
+            all_stats_table.c.year,
+            all_stats_table.c.month,
+            all_stats_table.c.name
+        )
+    else:
+        query = stats
+    return query.all()

app/service/rest.py

@@ -24,7 +24,8 @@ from app.dao.fact_notification_status_dao import (
     fetch_notification_status_for_service_by_month,
     fetch_notification_status_for_service_for_day,
     fetch_notification_status_for_service_for_today_and_7_previous_days,
-    fetch_stats_for_all_services_by_date_range)
+    fetch_stats_for_all_services_by_date_range, fetch_monthly_template_usage_for_service
+)
 from app.dao.inbound_numbers_dao import dao_allocate_number_for_service
 from app.dao.organisation_dao import dao_get_organisation_by_service_id
 from app.dao.service_data_retention_dao import (
@@ -579,10 +580,16 @@ def resume_service(service_id):
 @service_blueprint.route('/<uuid:service_id>/notifications/templates_usage/monthly', methods=['GET'])
 def get_monthly_template_usage(service_id):
     try:
-        data = dao_fetch_monthly_historical_usage_by_template_for_service(
-            service_id,
-            int(request.args.get('year', 'NaN'))
+        start_date, end_date = get_financial_year(int(request.args.get('year', 'NaN')))
+        data = fetch_monthly_template_usage_for_service(
+            start_date=start_date,
+            end_date=end_date,
+            service_id=service_id
         )
+        # data = dao_fetch_monthly_historical_usage_by_template_for_service(
+        #     service_id,
+        #     int(request.args.get('year', 'NaN'))
+        # )
 
         stats = list()
         for i in data: