mirror of
https://github.com/GSA/notifications-admin.git
synced 2026-02-06 03:13:42 -05:00
628e344b36
The data flow of other bits of our application looks like this:
```
API (returns JSON)
⬇
API client (returns a built in type, usually `dict`)
⬇
Model (returns an instance, eg of type `Service`)
⬇
View (returns HTML)
```
The user API client was architected weirdly, in that it returned a model
directly, like this:
```
API (returns JSON)
⬇
API client (returns a model, of type `User`, `InvitedUser`, etc)
⬇
View (returns HTML)
```
This mixing of different layers of the application is bad because it
makes it hard to write model code that doesn’t have circular
dependencies. As our application gets more complicated we will be
relying more on models to manage this complexity, so we should make it
easy, not hard to write them.
It also means that most of our mocking was of the User model, not just
the underlying JSON. So it would have been easy to introduce subtle bugs
to the user model, because it wasn’t being comprehensively tested. A lot
of the changed lines of code in this commit mean changing the tests to
mock only the JSON, which means that the model layer gets implicitly
tested.
For those reasons this commit changes the user API client to return
JSON, not an instance of `User` or other models.
694 lines
22 KiB
Python
694 lines
22 KiB
Python
import itertools
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import os
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import urllib
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from datetime import datetime, timedelta, timezone
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from functools import partial
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from time import monotonic
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import ago
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from flask import (
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current_app,
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flash,
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g,
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make_response,
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render_template,
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request,
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session,
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url_for,
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)
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from flask._compat import string_types
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from flask.globals import _lookup_req_object, _request_ctx_stack
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from flask_login import LoginManager, current_user
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from flask_wtf import CSRFProtect
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from flask_wtf.csrf import CSRFError
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from itsdangerous import BadSignature
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from notifications_python_client.errors import HTTPError
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from notifications_utils import formatters, logging, request_helper
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from notifications_utils.formatters import formatted_list
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from notifications_utils.recipients import (
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InvalidPhoneError,
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format_phone_number_human_readable,
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validate_phone_number,
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)
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from notifications_utils.sanitise_text import SanitiseASCII
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from notifications_utils.timezones import utc_string_to_aware_gmt_datetime
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from werkzeug.exceptions import HTTPException as WerkzeugHTTPException
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from werkzeug.exceptions import abort
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from werkzeug.local import LocalProxy
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from app import proxy_fix
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from app.asset_fingerprinter import asset_fingerprinter
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from app.commands import setup_commands
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from app.config import configs
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from app.extensions import (
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antivirus_client,
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redis_client,
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statsd_client,
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zendesk_client,
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)
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from app.models.organisation import Organisation
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from app.models.service import Service
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from app.models.user import AnonymousUser, User
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from app.navigation import (
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CaseworkNavigation,
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HeaderNavigation,
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MainNavigation,
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OrgNavigation,
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)
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from app.notify_client.api_key_api_client import api_key_api_client
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from app.notify_client.billing_api_client import billing_api_client
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from app.notify_client.complaint_api_client import complaint_api_client
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from app.notify_client.email_branding_client import email_branding_client
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from app.notify_client.events_api_client import events_api_client
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from app.notify_client.inbound_number_client import inbound_number_client
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from app.notify_client.invite_api_client import invite_api_client
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from app.notify_client.job_api_client import job_api_client
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from app.notify_client.letter_branding_client import letter_branding_client
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from app.notify_client.letter_jobs_client import letter_jobs_client
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from app.notify_client.notification_api_client import notification_api_client
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from app.notify_client.org_invite_api_client import org_invite_api_client
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from app.notify_client.organisations_api_client import organisations_client
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from app.notify_client.platform_stats_api_client import (
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platform_stats_api_client,
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)
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from app.notify_client.provider_client import provider_client
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from app.notify_client.service_api_client import service_api_client
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from app.notify_client.status_api_client import status_api_client
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from app.notify_client.template_folder_api_client import (
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template_folder_api_client,
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)
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from app.notify_client.template_statistics_api_client import (
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template_statistics_client,
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)
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from app.notify_client.user_api_client import user_api_client
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from app.utils import get_logo_cdn_domain, id_safe
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login_manager = LoginManager()
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csrf = CSRFProtect()
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# The current service attached to the request stack.
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def _get_current_service():
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return _lookup_req_object('service')
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current_service = LocalProxy(_get_current_service)
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# The current organisation attached to the request stack.
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current_organisation = LocalProxy(partial(_lookup_req_object, 'organisation'))
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navigation = {
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'casework_navigation': CaseworkNavigation(),
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'main_navigation': MainNavigation(),
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'header_navigation': HeaderNavigation(),
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'org_navigation': OrgNavigation(),
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}
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def create_app(application):
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setup_commands(application)
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notify_environment = os.environ['NOTIFY_ENVIRONMENT']
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application.config.from_object(configs[notify_environment])
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asset_fingerprinter._asset_root = application.config['ASSET_PATH']
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init_app(application)
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for client in (
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# Gubbins
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csrf,
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login_manager,
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proxy_fix,
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request_helper,
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# API clients
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api_key_api_client,
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billing_api_client,
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complaint_api_client,
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email_branding_client,
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events_api_client,
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inbound_number_client,
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invite_api_client,
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job_api_client,
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letter_branding_client,
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letter_jobs_client,
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notification_api_client,
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org_invite_api_client,
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organisations_client,
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platform_stats_api_client,
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provider_client,
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service_api_client,
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status_api_client,
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template_folder_api_client,
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template_statistics_client,
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user_api_client,
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# External API clients
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antivirus_client,
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statsd_client,
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zendesk_client,
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redis_client
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):
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client.init_app(application)
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logging.init_app(application, statsd_client)
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login_manager.login_view = 'main.sign_in'
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login_manager.login_message_category = 'default'
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login_manager.session_protection = None
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login_manager.anonymous_user = AnonymousUser
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# make sure we handle unicode correctly
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redis_client.redis_store.decode_responses = True
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from app.main import main as main_blueprint
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application.register_blueprint(main_blueprint)
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from .status import status as status_blueprint
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application.register_blueprint(status_blueprint)
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add_template_filters(application)
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register_errorhandlers(application)
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setup_event_handlers()
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def init_app(application):
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application.after_request(useful_headers_after_request)
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application.after_request(save_service_or_org_after_request)
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application.before_request(load_service_before_request)
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application.before_request(load_organisation_before_request)
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application.before_request(request_helper.check_proxy_header_before_request)
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@application.before_request
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def make_session_permanent():
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# this is dumb. You'd think, given that there's `config['PERMANENT_SESSION_LIFETIME']`, that you'd enable
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# permanent sessions in the config too - but no, you have to declare it for each request.
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# https://stackoverflow.com/questions/34118093/flask-permanent-session-where-to-define-them
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# session.permanent is also, helpfully, a way of saying that the session isn't permanent - in that, it will
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# expire on its own, as opposed to being controlled by the browser's session. Because session is a proxy, it's
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# only accessible from within a request context, so we need to set this before every request :rolls_eyes:
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session.permanent = True
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@application.context_processor
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def _attach_current_service():
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return {'current_service': current_service}
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@application.context_processor
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def _attach_current_organisation():
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return {'current_org': current_organisation}
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@application.context_processor
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def _attach_current_user():
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return {'current_user': current_user}
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@application.context_processor
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def _nav_selected():
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return navigation
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@application.before_request
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def record_start_time():
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g.start = monotonic()
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g.endpoint = request.endpoint
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@application.context_processor
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def inject_global_template_variables():
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return {
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'asset_path': application.config['ASSET_PATH'],
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'header_colour': application.config['HEADER_COLOUR'],
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'asset_url': asset_fingerprinter.get_url
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}
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def convert_to_boolean(value):
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if isinstance(value, string_types):
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if value.lower() in ['t', 'true', 'on', 'yes', '1']:
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return True
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elif value.lower() in ['f', 'false', 'off', 'no', '0']:
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return False
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return value
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def linkable_name(value):
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return urllib.parse.quote_plus(value)
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def format_datetime(date):
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return '{} at {}'.format(
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format_date(date),
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format_time(date)
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)
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def format_datetime_24h(date):
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return '{} at {}'.format(
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format_date(date),
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format_time_24h(date),
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)
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def format_datetime_normal(date):
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return '{} at {}'.format(
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format_date_normal(date),
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format_time(date)
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)
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def format_datetime_short(date):
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return '{} at {}'.format(
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format_date_short(date),
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format_time(date)
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)
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def format_datetime_relative(date):
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return '{} at {}'.format(
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get_human_day(date),
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format_time(date)
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)
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def format_datetime_numeric(date):
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return '{} {}'.format(
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format_date_numeric(date),
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format_time_24h(date),
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)
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def format_date_numeric(date):
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return utc_string_to_aware_gmt_datetime(date).strftime('%Y-%m-%d')
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def format_time_24h(date):
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return utc_string_to_aware_gmt_datetime(date).strftime('%H:%M')
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def get_human_day(time):
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# Add 1 minute to transform 00:00 into ‘midnight today’ instead of ‘midnight tomorrow’
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date = (utc_string_to_aware_gmt_datetime(time) - timedelta(minutes=1)).date()
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if date == (datetime.utcnow() + timedelta(days=1)).date():
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return 'tomorrow'
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if date == datetime.utcnow().date():
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return 'today'
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if date == (datetime.utcnow() - timedelta(days=1)).date():
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return 'yesterday'
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return _format_datetime_short(date)
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def format_time(date):
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return {
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'12:00AM': 'Midnight',
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'12:00PM': 'Midday'
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}.get(
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utc_string_to_aware_gmt_datetime(date).strftime('%-I:%M%p'),
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utc_string_to_aware_gmt_datetime(date).strftime('%-I:%M%p')
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).lower()
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def format_date(date):
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return utc_string_to_aware_gmt_datetime(date).strftime('%A %d %B %Y')
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def format_date_normal(date):
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return utc_string_to_aware_gmt_datetime(date).strftime('%d %B %Y').lstrip('0')
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def format_date_short(date):
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return _format_datetime_short(utc_string_to_aware_gmt_datetime(date))
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def _format_datetime_short(datetime):
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return datetime.strftime('%d %B').lstrip('0')
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def format_delta(date):
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delta = (
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datetime.now(timezone.utc)
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) - (
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utc_string_to_aware_gmt_datetime(date)
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)
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if delta < timedelta(seconds=30):
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return "just now"
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if delta < timedelta(seconds=60):
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return "in the last minute"
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return ago.human(
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delta,
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future_tense='{} from now', # No-one should ever see this
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past_tense='{} ago',
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precision=1
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)
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def valid_phone_number(phone_number):
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try:
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validate_phone_number(phone_number)
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return True
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except InvalidPhoneError:
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return False
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def format_notification_type(notification_type):
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return {
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'email': 'Email',
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'sms': 'SMS',
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'letter': 'Letter'
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}[notification_type]
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def format_notification_status(status, template_type):
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return {
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'email': {
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'failed': 'Failed',
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'technical-failure': 'Technical failure',
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'temporary-failure': 'Inbox not accepting messages right now',
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'permanent-failure': 'Email address doesn’t exist',
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'delivered': 'Delivered',
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'sending': 'Sending',
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'created': 'Sending',
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'sent': 'Delivered'
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},
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'sms': {
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'failed': 'Failed',
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'technical-failure': 'Technical failure',
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'temporary-failure': 'Phone not accepting messages right now',
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'permanent-failure': 'Phone number doesn’t exist',
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'delivered': 'Delivered',
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'sending': 'Sending',
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'created': 'Sending',
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'pending': 'Sending',
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'sent': 'Sent internationally'
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},
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'letter': {
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'failed': '',
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'technical-failure': 'Technical failure',
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'temporary-failure': '',
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'permanent-failure': '',
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'delivered': '',
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'received': '',
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'accepted': '',
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'sending': '',
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'created': '',
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'sent': '',
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'pending-virus-check': '',
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'virus-scan-failed': 'Virus detected',
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'returned-letter': '',
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'cancelled': '',
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'validation-failed': 'Validation failed',
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}
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}[template_type].get(status, status)
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def format_notification_status_as_time(status, created, updated):
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return dict.fromkeys(
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{'created', 'pending', 'sending'}, ' since {}'.format(created)
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).get(status, updated)
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def format_notification_status_as_field_status(status, notification_type):
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return {
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'letter': {
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'failed': 'error',
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'technical-failure': 'error',
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'temporary-failure': 'error',
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'permanent-failure': 'error',
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'delivered': None,
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'sent': None,
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'sending': None,
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'created': None,
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'accepted': None,
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'pending-virus-check': None,
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'virus-scan-failed': 'error',
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'returned-letter': None,
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'cancelled': 'error',
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}
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}.get(
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notification_type,
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{
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'failed': 'error',
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'technical-failure': 'error',
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'temporary-failure': 'error',
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'permanent-failure': 'error',
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'delivered': None,
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'sent': None,
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'sending': 'default',
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'created': 'default',
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'pending': 'default',
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}
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).get(status, 'error')
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def format_notification_status_as_url(status, notification_type):
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url = partial(url_for, "main.message_status")
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if status not in {
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'technical-failure', 'temporary-failure', 'permanent-failure',
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}:
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return None
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return {
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'email': url(_anchor='email-statuses'),
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'sms': url(_anchor='sms-statuses')
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}.get(notification_type)
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def nl2br(value):
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return formatters.nl2br(value) if value else ''
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@login_manager.user_loader
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def load_user(user_id):
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return User.from_id(user_id)
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def load_service_before_request():
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if '/static/' in request.url:
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_request_ctx_stack.top.service = None
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return
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if _request_ctx_stack.top is not None:
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_request_ctx_stack.top.service = None
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if request.view_args:
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service_id = request.view_args.get('service_id', session.get('service_id'))
|
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else:
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service_id = session.get('service_id')
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|
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if service_id:
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try:
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_request_ctx_stack.top.service = Service(
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service_api_client.get_service(service_id)['data']
|
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)
|
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except HTTPError as exc:
|
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# if service id isn't real, then 404 rather than 500ing later because we expect service to be set
|
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if exc.status_code == 404:
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abort(404)
|
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else:
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raise
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|
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def load_organisation_before_request():
|
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if '/static/' in request.url:
|
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_request_ctx_stack.top.organisation = None
|
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return
|
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if _request_ctx_stack.top is not None:
|
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_request_ctx_stack.top.organisation = None
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|
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if request.view_args:
|
||
org_id = request.view_args.get('org_id')
|
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|
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if org_id:
|
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try:
|
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_request_ctx_stack.top.organisation = Organisation.from_id(org_id)
|
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except HTTPError as exc:
|
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# if org id isn't real, then 404 rather than 500ing later because we expect org to be set
|
||
if exc.status_code == 404:
|
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abort(404)
|
||
else:
|
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raise
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|
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|
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def save_service_or_org_after_request(response):
|
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# Only save the current session if the request is 200
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service_id = request.view_args.get('service_id', None) if request.view_args else None
|
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organisation_id = request.view_args.get('org_id', None) if request.view_args else None
|
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if response.status_code == 200:
|
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if service_id:
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session['service_id'] = service_id
|
||
session['organisation_id'] = None
|
||
elif organisation_id:
|
||
session['service_id'] = None
|
||
session['organisation_id'] = organisation_id
|
||
return response
|
||
|
||
|
||
# https://www.owasp.org/index.php/List_of_useful_HTTP_headers
|
||
def useful_headers_after_request(response):
|
||
response.headers.add('X-Frame-Options', 'deny')
|
||
response.headers.add('X-Content-Type-Options', 'nosniff')
|
||
response.headers.add('X-XSS-Protection', '1; mode=block')
|
||
response.headers.add('Content-Security-Policy', (
|
||
"default-src 'self' {asset_domain} 'unsafe-inline';"
|
||
"script-src 'self' {asset_domain} *.google-analytics.com 'unsafe-inline' 'unsafe-eval' data:;"
|
||
"connect-src 'self' *.google-analytics.com;"
|
||
"object-src 'self';"
|
||
"font-src 'self' {asset_domain} data:;"
|
||
"img-src 'self' {asset_domain} *.google-analytics.com *.notifications.service.gov.uk {logo_domain} data:;"
|
||
"frame-src 'self' www.youtube.com;".format(
|
||
asset_domain=current_app.config['ASSET_DOMAIN'],
|
||
logo_domain=get_logo_cdn_domain(),
|
||
)
|
||
))
|
||
if 'Cache-Control' in response.headers:
|
||
del response.headers['Cache-Control']
|
||
response.headers.add(
|
||
'Cache-Control', 'no-store, no-cache, private, must-revalidate')
|
||
for key, value in response.headers:
|
||
response.headers[key] = SanitiseASCII.encode(value)
|
||
return response
|
||
|
||
|
||
def register_errorhandlers(application): # noqa (C901 too complex)
|
||
def _error_response(error_code):
|
||
resp = make_response(render_template("error/{0}.html".format(error_code)), error_code)
|
||
return useful_headers_after_request(resp)
|
||
|
||
@application.errorhandler(HTTPError)
|
||
def render_http_error(error):
|
||
application.logger.warning("API {} failed with status {} message {}".format(
|
||
error.response.url if error.response else 'unknown',
|
||
error.status_code,
|
||
error.message
|
||
))
|
||
error_code = error.status_code
|
||
if error_code == 400:
|
||
if isinstance(error.message, str):
|
||
msg = [error.message]
|
||
else:
|
||
msg = list(itertools.chain(*[error.message[x] for x in error.message.keys()]))
|
||
resp = make_response(render_template("error/400.html", message=msg))
|
||
return useful_headers_after_request(resp)
|
||
elif error_code not in [401, 404, 403, 410]:
|
||
# probably a 500 or 503
|
||
application.logger.exception("API {} failed with status {} message {}".format(
|
||
error.response.url if error.response else 'unknown',
|
||
error.status_code,
|
||
error.message
|
||
))
|
||
error_code = 500
|
||
return _error_response(error_code)
|
||
|
||
@application.errorhandler(400)
|
||
def handle_400(error):
|
||
return _error_response(400)
|
||
|
||
@application.errorhandler(410)
|
||
def handle_gone(error):
|
||
return _error_response(410)
|
||
|
||
@application.errorhandler(413)
|
||
def handle_payload_too_large(error):
|
||
return _error_response(413)
|
||
|
||
@application.errorhandler(404)
|
||
def handle_not_found(error):
|
||
return _error_response(404)
|
||
|
||
@application.errorhandler(403)
|
||
def handle_not_authorized(error):
|
||
return _error_response(403)
|
||
|
||
@application.errorhandler(401)
|
||
def handle_no_permissions(error):
|
||
return _error_response(401)
|
||
|
||
@application.errorhandler(BadSignature)
|
||
def handle_bad_token(error):
|
||
# if someone has a malformed token
|
||
flash('There’s something wrong with the link you’ve used.')
|
||
return _error_response(404)
|
||
|
||
@application.errorhandler(CSRFError)
|
||
def handle_csrf(reason):
|
||
application.logger.warning('csrf.error_message: {}'.format(reason))
|
||
|
||
if 'user_id' not in session:
|
||
application.logger.warning(
|
||
u'csrf.session_expired: Redirecting user to log in page'
|
||
)
|
||
|
||
return application.login_manager.unauthorized()
|
||
|
||
application.logger.warning(
|
||
u'csrf.invalid_token: Aborting request, user_id: {user_id}',
|
||
extra={'user_id': session['user_id']})
|
||
|
||
resp = make_response(render_template(
|
||
"error/400.html",
|
||
message=['Something went wrong, please go back and try again.']
|
||
), 400)
|
||
return useful_headers_after_request(resp)
|
||
|
||
@application.errorhandler(405)
|
||
def handle_405(error):
|
||
resp = make_response(render_template(
|
||
"error/400.html",
|
||
message=['Something went wrong, please go back and try again.']
|
||
), 405)
|
||
return useful_headers_after_request(resp)
|
||
|
||
@application.errorhandler(WerkzeugHTTPException)
|
||
def handle_http_error(error):
|
||
if error.code == 301:
|
||
# PermanentRedirect exception
|
||
return error
|
||
|
||
return _error_response(error.code)
|
||
|
||
@application.errorhandler(500)
|
||
@application.errorhandler(Exception)
|
||
def handle_bad_request(error):
|
||
current_app.logger.exception(error)
|
||
# We want the Flask in browser stacktrace
|
||
if current_app.config.get('DEBUG', None):
|
||
raise error
|
||
return _error_response(500)
|
||
|
||
|
||
def setup_event_handlers():
|
||
from flask_login import user_logged_in
|
||
from app.event_handlers import on_user_logged_in
|
||
|
||
user_logged_in.connect(on_user_logged_in)
|
||
|
||
|
||
def add_template_filters(application):
|
||
for fn in [
|
||
format_datetime,
|
||
format_datetime_24h,
|
||
format_datetime_normal,
|
||
format_datetime_short,
|
||
format_time,
|
||
valid_phone_number,
|
||
linkable_name,
|
||
format_date,
|
||
format_date_normal,
|
||
format_date_short,
|
||
format_datetime_relative,
|
||
format_delta,
|
||
format_notification_status,
|
||
format_notification_type,
|
||
format_notification_status_as_time,
|
||
format_notification_status_as_field_status,
|
||
format_notification_status_as_url,
|
||
formatted_list,
|
||
nl2br,
|
||
format_phone_number_human_readable,
|
||
id_safe,
|
||
]:
|
||
application.add_template_filter(fn)
|