notifications-api/app/service/rest.py

import itertools
from datetime import datetime

from flask import (
    jsonify,
    request,
    current_app,
    Blueprint
)
from notifications_utils.letter_timings import letter_can_be_cancelled
from notifications_utils.timezones import convert_utc_to_bst
from sqlalchemy.exc import IntegrityError
from sqlalchemy.orm.exc import NoResultFound

from app.dao import notifications_dao
from app.dao.dao_utils import dao_rollback
from app.dao.date_util import get_financial_year
from app.dao.api_key_dao import (
    save_model_api_key,
    get_model_api_keys,
    get_unsigned_secret,
    expire_api_key)
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_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 (
    fetch_service_data_retention,
    fetch_service_data_retention_by_id,
    fetch_service_data_retention_by_notification_type,
    insert_service_data_retention,
    update_service_data_retention,
)
from app.dao.service_sms_sender_dao import (
    archive_sms_sender,
    dao_add_sms_sender_for_service,
    dao_update_service_sms_sender,
    dao_get_service_sms_senders_by_id,
    dao_get_sms_senders_by_service_id,
    update_existing_sms_sender_with_inbound_number
)
from app.dao.services_dao import (
    dao_add_user_to_service,
    dao_archive_service,
    dao_create_service,
    dao_fetch_all_services,
    dao_fetch_all_services_by_user,
    dao_fetch_service_by_id,
    dao_fetch_todays_stats_for_service,
    dao_fetch_todays_stats_for_all_services,
    dao_resume_service,
    dao_remove_user_from_service,
    dao_suspend_service,
    dao_update_service,
)
from app.dao.service_whitelist_dao import (
    dao_fetch_service_whitelist,
    dao_add_and_commit_whitelisted_contacts,
    dao_remove_service_whitelist
)
from app.dao.service_email_reply_to_dao import (
    add_reply_to_email_address_for_service,
    archive_reply_to_email_address,
    dao_get_reply_to_by_id,
    dao_get_reply_to_by_service_id,
    update_reply_to_email_address
)
from app.dao.service_letter_contact_dao import (
    archive_letter_contact,
    dao_get_letter_contacts_by_service_id,
    dao_get_letter_contact_by_id,
    add_letter_contact_for_service,
    update_letter_contact
)
from app.dao.users_dao import get_user_by_id
from app.errors import (
    InvalidRequest,
    register_errors
)
from app.letters.utils import letter_print_day
from app.models import LETTER_TYPE, NOTIFICATION_CANCELLED, Service, EmailBranding
from app.schema_validation import validate
from app.service import statistics
from app.service.service_data_retention_schema import (
    add_service_data_retention_request,
    update_service_data_retention_request
)
from app.service.service_senders_schema import (
    add_service_email_reply_to_request,
    add_service_letter_contact_block_request,
    add_service_sms_sender_request
)
from app.service.utils import get_whitelist_objects
from app.service.sender import send_notification_to_service_users
from app.service.send_notification import send_one_off_notification
from app.schemas import (
    service_schema,
    api_key_schema,
    permission_schema,
    notification_with_template_schema,
    notifications_filter_schema,
    detailed_service_schema
)
from app.utils import pagination_links

service_blueprint = Blueprint('service', __name__)

register_errors(service_blueprint)


@service_blueprint.errorhandler(IntegrityError)
def handle_integrity_error(exc):
    """
    Handle integrity errors caused by the unique constraint on ix_organisation_name
    """
    if 'services_name_key' or 'services_email_from_key' in str(exc):
        return jsonify(
            result='error',
            message={'name': ["Duplicate service name '{}'".format(
                exc.params.get('name', exc.params.get('email_from', ''))
            )]}
        ), 400
    current_app.logger.exception(exc)
    return jsonify(result='error', message="Internal server error"), 500


@service_blueprint.route('', methods=['GET'])
def get_services():
    only_active = request.args.get('only_active') == 'True'
    detailed = request.args.get('detailed') == 'True'
    user_id = request.args.get('user_id', None)
    include_from_test_key = request.args.get('include_from_test_key', 'True') != 'False'

    # If start and end date are not set, we are expecting today's stats.
    today = str(datetime.utcnow().date())

    start_date = datetime.strptime(request.args.get('start_date', today), '%Y-%m-%d').date()
    end_date = datetime.strptime(request.args.get('end_date', today), '%Y-%m-%d').date()

    if user_id:
        services = dao_fetch_all_services_by_user(user_id, only_active)
    elif detailed:
        result = jsonify(data=get_detailed_services(start_date=start_date, end_date=end_date,
                                                    only_active=only_active,
                                                    include_from_test_key=include_from_test_key
                                                    ))
        return result
    else:
        services = dao_fetch_all_services(only_active)
    data = service_schema.dump(services, many=True).data
    return jsonify(data=data)


@service_blueprint.route('/<uuid:service_id>', methods=['GET'])
def get_service_by_id(service_id):
    if request.args.get('detailed') == 'True':
        data = get_detailed_service(service_id, today_only=request.args.get('today_only') == 'True')
    else:
        fetched = dao_fetch_service_by_id(service_id)

        data = service_schema.dump(fetched).data
    return jsonify(data=data)


@service_blueprint.route('/<uuid:service_id>/statistics')
def get_service_notification_statistics(service_id):
    return jsonify(data=get_service_statistics(
        service_id,
        request.args.get('today_only') == 'True',
        int(request.args.get('limit_days', 7))
    ))


@service_blueprint.route('', methods=['POST'])
def create_service():
    data = request.get_json()

    if not data.get('user_id'):
        errors = {'user_id': ['Missing data for required field.']}
        raise InvalidRequest(errors, status_code=400)

    # validate json with marshmallow
    service_schema.load(data)

    user = get_user_by_id(data.pop('user_id'))

    # unpack valid json into service object
    valid_service = Service.from_json(data)

    dao_create_service(valid_service, user)
    return jsonify(data=service_schema.dump(valid_service).data), 201


@service_blueprint.route('/<uuid:service_id>', methods=['POST'])
def update_service(service_id):
    req_json = request.get_json()
    fetched_service = dao_fetch_service_by_id(service_id)
    # Capture the status change here as Marshmallow changes this later
    service_going_live = fetched_service.restricted and not req_json.get('restricted', True)
    current_data = dict(service_schema.dump(fetched_service).data.items())
    current_data.update(request.get_json())

    service = service_schema.load(current_data).data
    org_type = req_json.get('organisation_type', None)
    if org_type:
        service.crown = org_type == 'central'

    if 'email_branding' in req_json:
        email_branding_id = req_json['email_branding']
        service.email_branding = None if not email_branding_id else EmailBranding.query.get(email_branding_id)

    dao_update_service(service)

    if service_going_live:
        send_notification_to_service_users(
            service_id=service_id,
            template_id=current_app.config['SERVICE_NOW_LIVE_TEMPLATE_ID'],
            personalisation={
                'service_name': current_data['name'],
                'message_limit': '{:,}'.format(current_data['message_limit'])
            },
            include_user_fields=['name']
        )

    return jsonify(data=service_schema.dump(fetched_service).data), 200


@service_blueprint.route('/<uuid:service_id>/api-key', methods=['POST'])
def create_api_key(service_id=None):
    fetched_service = dao_fetch_service_by_id(service_id=service_id)
    valid_api_key = api_key_schema.load(request.get_json()).data
    valid_api_key.service = fetched_service
    save_model_api_key(valid_api_key)
    unsigned_api_key = get_unsigned_secret(valid_api_key.id)
    return jsonify(data=unsigned_api_key), 201


@service_blueprint.route('/<uuid:service_id>/api-key/revoke/<uuid:api_key_id>', methods=['POST'])
def revoke_api_key(service_id, api_key_id):
    expire_api_key(service_id=service_id, api_key_id=api_key_id)
    return jsonify(), 202


@service_blueprint.route('/<uuid:service_id>/api-keys', methods=['GET'])
@service_blueprint.route('/<uuid:service_id>/api-keys/<uuid:key_id>', methods=['GET'])
def get_api_keys(service_id, key_id=None):
    dao_fetch_service_by_id(service_id=service_id)

    try:
        if key_id:
            api_keys = [get_model_api_keys(service_id=service_id, id=key_id)]
        else:
            api_keys = get_model_api_keys(service_id=service_id)
    except NoResultFound:
        error = "API key not found for id: {}".format(service_id)
        raise InvalidRequest(error, status_code=404)

    return jsonify(apiKeys=api_key_schema.dump(api_keys, many=True).data), 200


@service_blueprint.route('/<uuid:service_id>/users', methods=['GET'])
def get_users_for_service(service_id):
    fetched = dao_fetch_service_by_id(service_id)
    return jsonify(data=[x.serialize() for x in fetched.users])


@service_blueprint.route('/<uuid:service_id>/users/<user_id>', methods=['POST'])
def add_user_to_service(service_id, user_id):
    service = dao_fetch_service_by_id(service_id)
    user = get_user_by_id(user_id=user_id)

    if user in service.users:
        error = 'User id: {} already part of service id: {}'.format(user_id, service_id)
        raise InvalidRequest(error, status_code=400)

    permissions = permission_schema.load(request.get_json(), many=True).data
    dao_add_user_to_service(service, user, permissions)
    data = service_schema.dump(service).data
    return jsonify(data=data), 201


@service_blueprint.route('/<uuid:service_id>/users/<user_id>', methods=['DELETE'])
def remove_user_from_service(service_id, user_id):
    service = dao_fetch_service_by_id(service_id)
    user = get_user_by_id(user_id=user_id)
    if user not in service.users:
        error = 'User not found'
        raise InvalidRequest(error, status_code=404)

    elif len(service.users) == 1:
        error = 'You cannot remove the only user for a service'
        raise InvalidRequest(error, status_code=400)

    dao_remove_user_from_service(service, user)
    return jsonify({}), 204


# 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
@service_blueprint.route('/<uuid:service_id>/history', methods=['GET'])
def get_service_history(service_id):
    from app.models import (Service, ApiKey, TemplateHistory)
    from app.schemas import (
        service_history_schema,
        api_key_history_schema,
        template_history_schema
    )

    service_history = Service.get_history_model().query.filter_by(id=service_id).all()
    service_data = service_history_schema.dump(service_history, many=True).data
    api_key_history = ApiKey.get_history_model().query.filter_by(service_id=service_id).all()
    api_keys_data = api_key_history_schema.dump(api_key_history, many=True).data

    template_history = TemplateHistory.query.filter_by(service_id=service_id).all()
    template_data, errors = template_history_schema.dump(template_history, many=True)

    data = {
        'service_history': service_data,
        'api_key_history': api_keys_data,
        'template_history': template_data,
        'events': []}

    return jsonify(data=data)


@service_blueprint.route('/<uuid:service_id>/notifications', methods=['GET'])
def get_all_notifications_for_service(service_id):
    data = notifications_filter_schema.load(request.args).data
    if data.get('to'):
        notification_type = data.get('template_type')[0] if data.get('template_type') else None
        return search_for_notification_by_to_field(service_id=service_id,
                                                   search_term=data['to'],
                                                   statuses=data.get('status'),
                                                   notification_type=notification_type)
    page = data['page'] if 'page' in data else 1
    page_size = data['page_size'] if 'page_size' in data else current_app.config.get('PAGE_SIZE')
    limit_days = data.get('limit_days')
    include_jobs = data.get('include_jobs', True)
    include_from_test_key = data.get('include_from_test_key', False)
    include_one_off = data.get('include_one_off', True)

    count_pages = data.get('count_pages', True)

    pagination = notifications_dao.get_notifications_for_service(
        service_id,
        filter_dict=data,
        page=page,
        page_size=page_size,
        count_pages=count_pages,
        limit_days=limit_days,
        include_jobs=include_jobs,
        include_from_test_key=include_from_test_key,
        include_one_off=include_one_off
    )

    kwargs = request.args.to_dict()
    kwargs['service_id'] = service_id

    if data.get('format_for_csv'):
        notifications = [notification.serialize_for_csv() for notification in pagination.items]
    else:
        notifications = notification_with_template_schema.dump(pagination.items, many=True).data
    return jsonify(
        notifications=notifications,
        page_size=page_size,
        total=pagination.total,
        links=pagination_links(
            pagination,
            '.get_all_notifications_for_service',
            **kwargs
        )
    ), 200


@service_blueprint.route('/<uuid:service_id>/notifications/<uuid:notification_id>', methods=['GET'])
def get_notification_for_service(service_id, notification_id):

    notification = notifications_dao.get_notification_with_personalisation(
        service_id,
        notification_id,
        key_type=None,
    )
    return jsonify(
        notification_with_template_schema.dump(notification).data,
    ), 200


@service_blueprint.route('/<uuid:service_id>/notifications/<uuid:notification_id>/cancel', methods=['POST'])
def cancel_notification_for_service(service_id, notification_id):
    notification = notifications_dao.get_notification_by_id(notification_id, service_id)

    if not notification:
        raise InvalidRequest('Notification not found', status_code=404)
    elif notification.notification_type != LETTER_TYPE:
        raise InvalidRequest('Notification cannot be cancelled - only letters can be cancelled', status_code=400)
    elif not letter_can_be_cancelled(notification.status, notification.created_at):
        print_day = letter_print_day(notification.created_at)

        raise InvalidRequest(
            "It’s too late to cancel this letter. Printing started {} at 5.30pm".format(print_day),
            status_code=400)

    updated_notification = notifications_dao.update_notification_status_by_id(
        notification_id,
        NOTIFICATION_CANCELLED,
    )

    return jsonify(
        notification_with_template_schema.dump(updated_notification).data
    ), 200


def search_for_notification_by_to_field(service_id, search_term, statuses, notification_type):
    results = notifications_dao.dao_get_notifications_by_to_field(
        service_id=service_id,
        search_term=search_term,
        statuses=statuses,
        notification_type=notification_type
    )
    return jsonify(
        notifications=notification_with_template_schema.dump(results, many=True).data
    ), 200


@service_blueprint.route('/<uuid:service_id>/notifications/monthly', methods=['GET'])
def get_monthly_notification_stats(service_id):
    # check service_id validity
    dao_fetch_service_by_id(service_id)

    try:
        year = int(request.args.get('year', 'NaN'))
    except ValueError:
        raise InvalidRequest('Year must be a number', status_code=400)

    start_date, end_date = get_financial_year(year)

    data = statistics.create_empty_monthly_notification_status_stats_dict(year)

    stats = fetch_notification_status_for_service_by_month(start_date, end_date, service_id)
    statistics.add_monthly_notification_status_stats(data, stats)

    now = datetime.utcnow()
    if end_date > now:
        todays_deltas = fetch_notification_status_for_service_for_day(convert_utc_to_bst(now), service_id=service_id)
        statistics.add_monthly_notification_status_stats(data, todays_deltas)

    return jsonify(data=data)


def get_detailed_service(service_id, today_only=False):
    service = dao_fetch_service_by_id(service_id)

    service.statistics = get_service_statistics(service_id, today_only)
    return detailed_service_schema.dump(service).data


def get_service_statistics(service_id, today_only, limit_days=7):
    # today_only flag is used by the send page to work out if the service will exceed their daily usage by sending a job
    if today_only:
        stats = dao_fetch_todays_stats_for_service(service_id)
    else:
        stats = fetch_notification_status_for_service_for_today_and_7_previous_days(service_id, limit_days=limit_days)

    return statistics.format_statistics(stats)


def get_detailed_services(start_date, end_date, only_active=False, include_from_test_key=True):
    if start_date == datetime.utcnow().date():
        stats = dao_fetch_todays_stats_for_all_services(include_from_test_key=include_from_test_key,
                                                        only_active=only_active)
    else:

        stats = fetch_stats_for_all_services_by_date_range(start_date=start_date,
                                                           end_date=end_date,
                                                           include_from_test_key=include_from_test_key,
                                                           )
    results = []
    for service_id, rows in itertools.groupby(stats, lambda x: x.service_id):
        rows = list(rows)
        s = statistics.format_statistics(rows)
        results.append({
            'id': str(rows[0].service_id),
            'name': rows[0].name,
            'notification_type': rows[0].notification_type,
            'research_mode': rows[0].research_mode,
            'restricted': rows[0].restricted,
            'active': rows[0].active,
            'created_at': rows[0].created_at,
            'statistics': s
        })
    return results


@service_blueprint.route('/<uuid:service_id>/whitelist', methods=['GET'])
def get_whitelist(service_id):
    from app.models import (EMAIL_TYPE, MOBILE_TYPE)
    service = dao_fetch_service_by_id(service_id)

    if not service:
        raise InvalidRequest("Service does not exist", status_code=404)

    whitelist = dao_fetch_service_whitelist(service.id)
    return jsonify(
        email_addresses=[item.recipient for item in whitelist
                         if item.recipient_type == EMAIL_TYPE],
        phone_numbers=[item.recipient for item in whitelist
                       if item.recipient_type == MOBILE_TYPE]
    )


@service_blueprint.route('/<uuid:service_id>/whitelist', methods=['PUT'])
def update_whitelist(service_id):
    # doesn't commit so if there are any errors, we preserve old values in db
    dao_remove_service_whitelist(service_id)
    try:
        whitelist_objs = get_whitelist_objects(service_id, request.get_json())
    except ValueError as e:
        current_app.logger.exception(e)
        dao_rollback()
        msg = '{} is not a valid email address or phone number'.format(str(e))
        raise InvalidRequest(msg, 400)
    else:
        dao_add_and_commit_whitelisted_contacts(whitelist_objs)
        return '', 204


@service_blueprint.route('/<uuid:service_id>/archive', methods=['POST'])
def archive_service(service_id):
    """
    When a service is archived the service is made inactive, templates are archived and api keys are revoked.
    There is no coming back from this operation.
    :param service_id:
    :return:
    """
    service = dao_fetch_service_by_id(service_id)

    if service.active:
        dao_archive_service(service.id)

    return '', 204


@service_blueprint.route('/<uuid:service_id>/suspend', methods=['POST'])
def suspend_service(service_id):
    """
    Suspending a service will mark the service as inactive and revoke API keys.
    :param service_id:
    :return:
    """
    service = dao_fetch_service_by_id(service_id)

    if service.active:
        dao_suspend_service(service.id)

    return '', 204


@service_blueprint.route('/<uuid:service_id>/resume', methods=['POST'])
def resume_service(service_id):
    """
    Resuming a service that has been suspended will mark the service as active.
    The service will need to re-create API keys
    :param service_id:
    :return:
    """
    service = dao_fetch_service_by_id(service_id)

    if not service.active:
        dao_resume_service(service.id)

    return '', 204


@service_blueprint.route('/<uuid:service_id>/notifications/templates_usage/monthly', methods=['GET'])
def get_monthly_template_usage(service_id):
    try:
        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
        )
        stats = list()
        for i in data:
            stats.append(
                {
                    'template_id': str(i.template_id),
                    'name': i.name,
                    'type': i.template_type,
                    'month': i.month,
                    'year': i.year,
                    'count': i.count,
                    'is_precompiled_letter': i.is_precompiled_letter
                }
            )

        return jsonify(stats=stats), 200
    except ValueError:
        raise InvalidRequest('Year must be a number', status_code=400)


@service_blueprint.route('/<uuid:service_id>/send-notification', methods=['POST'])
def create_one_off_notification(service_id):
    resp = send_one_off_notification(service_id, request.get_json())
    return jsonify(resp), 201


@service_blueprint.route('/<uuid:service_id>/email-reply-to', methods=["GET"])
def get_email_reply_to_addresses(service_id):
    result = dao_get_reply_to_by_service_id(service_id)
    return jsonify([i.serialize() for i in result]), 200


@service_blueprint.route('/<uuid:service_id>/email-reply-to/<uuid:reply_to_id>', methods=["GET"])
def get_email_reply_to_address(service_id, reply_to_id):
    result = dao_get_reply_to_by_id(service_id=service_id, reply_to_id=reply_to_id)
    return jsonify(result.serialize()), 200


@service_blueprint.route('/<uuid:service_id>/email-reply-to', methods=['POST'])
def add_service_reply_to_email_address(service_id):
    # validate the service exists, throws ResultNotFound exception.
    dao_fetch_service_by_id(service_id)
    form = validate(request.get_json(), add_service_email_reply_to_request)
    new_reply_to = add_reply_to_email_address_for_service(service_id=service_id,
                                                          email_address=form['email_address'],
                                                          is_default=form.get('is_default', True))
    return jsonify(data=new_reply_to.serialize()), 201


@service_blueprint.route('/<uuid:service_id>/email-reply-to/<uuid:reply_to_email_id>', methods=['POST'])
def update_service_reply_to_email_address(service_id, reply_to_email_id):
    # validate the service exists, throws ResultNotFound exception.
    dao_fetch_service_by_id(service_id)
    form = validate(request.get_json(), add_service_email_reply_to_request)
    new_reply_to = update_reply_to_email_address(service_id=service_id,
                                                 reply_to_id=reply_to_email_id,
                                                 email_address=form['email_address'],
                                                 is_default=form.get('is_default', True))
    return jsonify(data=new_reply_to.serialize()), 200


@service_blueprint.route('/<uuid:service_id>/email-reply-to/<uuid:reply_to_email_id>/archive', methods=['POST'])
def delete_service_reply_to_email_address(service_id, reply_to_email_id):
    archived_reply_to = archive_reply_to_email_address(service_id, reply_to_email_id)

    return jsonify(data=archived_reply_to.serialize()), 200


@service_blueprint.route('/<uuid:service_id>/letter-contact', methods=["GET"])
def get_letter_contacts(service_id):
    result = dao_get_letter_contacts_by_service_id(service_id)
    return jsonify([i.serialize() for i in result]), 200


@service_blueprint.route('/<uuid:service_id>/letter-contact/<uuid:letter_contact_id>', methods=["GET"])
def get_letter_contact_by_id(service_id, letter_contact_id):
    result = dao_get_letter_contact_by_id(service_id=service_id, letter_contact_id=letter_contact_id)
    return jsonify(result.serialize()), 200


@service_blueprint.route('/<uuid:service_id>/letter-contact', methods=['POST'])
def add_service_letter_contact(service_id):
    # validate the service exists, throws ResultNotFound exception.
    dao_fetch_service_by_id(service_id)
    form = validate(request.get_json(), add_service_letter_contact_block_request)
    new_letter_contact = add_letter_contact_for_service(service_id=service_id,
                                                        contact_block=form['contact_block'],
                                                        is_default=form.get('is_default', True))
    return jsonify(data=new_letter_contact.serialize()), 201


@service_blueprint.route('/<uuid:service_id>/letter-contact/<uuid:letter_contact_id>', methods=['POST'])
def update_service_letter_contact(service_id, letter_contact_id):
    # validate the service exists, throws ResultNotFound exception.
    dao_fetch_service_by_id(service_id)
    form = validate(request.get_json(), add_service_letter_contact_block_request)
    new_reply_to = update_letter_contact(service_id=service_id,
                                         letter_contact_id=letter_contact_id,
                                         contact_block=form['contact_block'],
                                         is_default=form.get('is_default', True))
    return jsonify(data=new_reply_to.serialize()), 200


@service_blueprint.route('/<uuid:service_id>/letter-contact/<uuid:letter_contact_id>/archive', methods=['POST'])
def delete_service_letter_contact(service_id, letter_contact_id):
    archived_letter_contact = archive_letter_contact(service_id, letter_contact_id)

    return jsonify(data=archived_letter_contact.serialize()), 200


@service_blueprint.route('/<uuid:service_id>/sms-sender', methods=['POST'])
def add_service_sms_sender(service_id):
    dao_fetch_service_by_id(service_id)
    form = validate(request.get_json(), add_service_sms_sender_request)
    inbound_number_id = form.get('inbound_number_id', None)
    sms_sender = form.get('sms_sender')

    if inbound_number_id:
        updated_number = dao_allocate_number_for_service(service_id=service_id, inbound_number_id=inbound_number_id)
        # the sms_sender in the form is not set, use the inbound number
        sms_sender = updated_number.number
        existing_sms_sender = dao_get_sms_senders_by_service_id(service_id)
        # we don't want to create a new sms sender for the service if we are allocating an inbound number.
        if len(existing_sms_sender) == 1:
            update_existing_sms_sender = existing_sms_sender[0]
            new_sms_sender = update_existing_sms_sender_with_inbound_number(
                service_sms_sender=update_existing_sms_sender,
                sms_sender=sms_sender,
                inbound_number_id=inbound_number_id)

            return jsonify(new_sms_sender.serialize()), 201

    new_sms_sender = dao_add_sms_sender_for_service(service_id=service_id,
                                                    sms_sender=sms_sender,
                                                    is_default=form['is_default'],
                                                    inbound_number_id=inbound_number_id
                                                    )
    return jsonify(new_sms_sender.serialize()), 201


@service_blueprint.route('/<uuid:service_id>/sms-sender/<uuid:sms_sender_id>', methods=['POST'])
def update_service_sms_sender(service_id, sms_sender_id):
    form = validate(request.get_json(), add_service_sms_sender_request)

    sms_sender_to_update = dao_get_service_sms_senders_by_id(service_id=service_id,
                                                             service_sms_sender_id=sms_sender_id)
    if sms_sender_to_update.inbound_number_id and form['sms_sender'] != sms_sender_to_update.sms_sender:
        raise InvalidRequest("You can not change the inbound number for service {}".format(service_id),
                             status_code=400)

    new_sms_sender = dao_update_service_sms_sender(service_id=service_id,
                                                   service_sms_sender_id=sms_sender_id,
                                                   is_default=form['is_default'],
                                                   sms_sender=form['sms_sender']
                                                   )
    return jsonify(new_sms_sender.serialize()), 200


@service_blueprint.route('/<uuid:service_id>/sms-sender/<uuid:sms_sender_id>/archive', methods=['POST'])
def delete_service_sms_sender(service_id, sms_sender_id):
    sms_sender = archive_sms_sender(service_id, sms_sender_id)

    return jsonify(data=sms_sender.serialize()), 200


@service_blueprint.route('/<uuid:service_id>/sms-sender/<uuid:sms_sender_id>', methods=['GET'])
def get_service_sms_sender_by_id(service_id, sms_sender_id):
    sms_sender = dao_get_service_sms_senders_by_id(service_id=service_id,
                                                   service_sms_sender_id=sms_sender_id)
    return jsonify(sms_sender.serialize()), 200


@service_blueprint.route('/<uuid:service_id>/sms-sender', methods=['GET'])
def get_service_sms_senders_for_service(service_id):
    sms_senders = dao_get_sms_senders_by_service_id(service_id=service_id)
    return jsonify([sms_sender.serialize() for sms_sender in sms_senders]), 200


@service_blueprint.route('/<uuid:service_id>/organisation', methods=['GET'])
def get_organisation_for_service(service_id):
    organisation = dao_get_organisation_by_service_id(service_id=service_id)
    return jsonify(organisation.serialize() if organisation else {}), 200


@service_blueprint.route('/unique', methods=["GET"])
def is_service_name_unique():
    service_id, name, email_from = check_request_args(request)

    name_exists = Service.query.filter_by(name=name).first()

    email_from_exists = Service.query.filter(
        Service.email_from == email_from,
        Service.id != service_id
    ).first()

    result = not (name_exists or email_from_exists)
    return jsonify(result=result), 200


@service_blueprint.route('/<uuid:service_id>/data-retention', methods=['GET'])
def get_data_retention_for_service(service_id):
    data_retention_list = fetch_service_data_retention(service_id)
    return jsonify([data_retention.serialize() for data_retention in data_retention_list]), 200


@service_blueprint.route('/<uuid:service_id>/data-retention/notification-type/<notification_type>', methods=['GET'])
def get_data_retention_for_service_notification_type(service_id, notification_type):
    data_retention = fetch_service_data_retention_by_notification_type(service_id, notification_type)
    return jsonify(data_retention.serialize() if data_retention else {}), 200


@service_blueprint.route('/<uuid:service_id>/data-retention/<uuid:data_retention_id>', methods=['GET'])
def get_data_retention_for_service_by_id(service_id, data_retention_id):
    data_retention = fetch_service_data_retention_by_id(service_id, data_retention_id)
    return jsonify(data_retention.serialize() if data_retention else {}), 200


@service_blueprint.route('/<uuid:service_id>/data-retention', methods=['POST'])
def create_service_data_retention(service_id):
    form = validate(request.get_json(), add_service_data_retention_request)
    try:
        new_data_retention = insert_service_data_retention(
            service_id=service_id,
            notification_type=form.get("notification_type"),
            days_of_retention=form.get("days_of_retention")
        )
    except IntegrityError:
        raise InvalidRequest(
            message="Service already has data retention for {} notification type".format(form.get("notification_type")),
            status_code=400
        )

    return jsonify(result=new_data_retention.serialize()), 201


@service_blueprint.route('/<uuid:service_id>/data-retention/<uuid:data_retention_id>', methods=['POST'])
def modify_service_data_retention(service_id, data_retention_id):
    form = validate(request.get_json(), update_service_data_retention_request)

    update_count = update_service_data_retention(
        service_data_retention_id=data_retention_id,
        service_id=service_id,
        days_of_retention=form.get("days_of_retention")
    )
    if update_count == 0:
        raise InvalidRequest(
            message="The service data retention for id: {} was not found for service: {}".format(data_retention_id,
                                                                                                 service_id),
            status_code=404)

    return '', 204


def check_request_args(request):
    service_id = request.args.get('service_id')
    name = request.args.get('name', None)
    email_from = request.args.get('email_from', None)
    errors = []
    if not service_id:
        errors.append({'service_id': ["Can't be empty"]})
    if not name:
        errors.append({'name': ["Can't be empty"]})
    if not email_from:
        errors.append({'email_from': ["Can't be empty"]})
    if errors:
        raise InvalidRequest(errors, status_code=400)
    return service_id, name, email_from