tracim_v2/backend/tracim_backend/__init__.py

# -*- coding: utf-8 -*-


try:  # Python 3.5+
    from http import HTTPStatus
except ImportError:
    from http import client as HTTPStatus

from pyramid.config import Configurator
from pyramid.authentication import BasicAuthAuthenticationPolicy
from hapic.ext.pyramid import PyramidContext
from pyramid.exceptions import NotFound
from sqlalchemy.exc import OperationalError

from tracim_backend.extensions import hapic
from tracim_backend.config import CFG
from tracim_backend.lib.utils.request import TracimRequest
from tracim_backend.lib.utils.authentification import basic_auth_check_credentials
from tracim_backend.lib.utils.authentification import BASIC_AUTH_WEBUI_REALM
from tracim_backend.lib.utils.authorization import AcceptAllAuthorizationPolicy
from tracim_backend.lib.utils.authorization import TRACIM_DEFAULT_PERM
from tracim_backend.lib.utils.cors import add_cors_support
from tracim_backend.lib.webdav import WebdavAppFactory
from tracim_backend.views import BASE_API_V2
from tracim_backend.views.contents_api.html_document_controller import HTMLDocumentController  # nopep8
from tracim_backend.views.contents_api.threads_controller import ThreadController
from tracim_backend.views.core_api.session_controller import SessionController
from tracim_backend.views.core_api.system_controller import SystemController
from tracim_backend.views.core_api.user_controller import UserController
from tracim_backend.views.core_api.workspace_controller import WorkspaceController
from tracim_backend.views.contents_api.comment_controller import CommentController
from tracim_backend.views.contents_api.file_controller import FileController
from tracim_backend.views.errors import ErrorSchema
from tracim_backend.exceptions import NotAuthenticated
from tracim_backend.exceptions import UserNotActive
from tracim_backend.exceptions import InvalidId
from tracim_backend.exceptions import InsufficientUserProfile
from tracim_backend.exceptions import InsufficientUserRoleInWorkspace
from tracim_backend.exceptions import WorkspaceNotFoundInTracimRequest
from tracim_backend.exceptions import UserNotFoundInTracimRequest
from tracim_backend.exceptions import ContentNotFoundInTracimRequest
from tracim_backend.exceptions import WorkspaceNotFound
from tracim_backend.exceptions import ContentNotFound
from tracim_backend.exceptions import UserDoesNotExist
from tracim_backend.exceptions import AuthenticationFailed
from tracim_backend.exceptions import ContentTypeNotAllowed


def web(global_config, **local_settings):
    """ This function returns a Pyramid WSGI application.
    """
    settings = global_config
    settings.update(local_settings)
    # set CFG object
    app_config = CFG(settings)
    app_config.configure_filedepot()
    settings['CFG'] = app_config
    configurator = Configurator(settings=settings, autocommit=True)
    # Add BasicAuthPolicy
    authn_policy = BasicAuthAuthenticationPolicy(
        basic_auth_check_credentials,
        realm=BASIC_AUTH_WEBUI_REALM,
    )
    configurator.include(add_cors_support)
    # make sure to add this before other routes to intercept OPTIONS
    configurator.add_cors_preflight_handler()
    # Default authorization : Accept anything.
    configurator.set_authorization_policy(AcceptAllAuthorizationPolicy())
    configurator.set_authentication_policy(authn_policy)
    # INFO - GM - 11-04-2018 - set default perm
    # setting default perm is needed to force authentification
    # mecanism in all views.
    configurator.set_default_permission(TRACIM_DEFAULT_PERM)
    # Override default request
    configurator.set_request_factory(TracimRequest)
    # Pyramids "plugin" include.
    configurator.include('pyramid_jinja2')
    # Add SqlAlchemy DB
    configurator.include('.models')
    # set Hapic
    context = PyramidContext(
        configurator=configurator,
        default_error_builder=ErrorSchema(),
        debug=app_config.DEBUG,
    )
    hapic.set_context(context)
    # INFO - G.M - 2018-07-04 - global-context exceptions
    # Not found
    context.handle_exception(NotFound, HTTPStatus.NOT_FOUND)
    # Bad request
    context.handle_exception(WorkspaceNotFoundInTracimRequest, HTTPStatus.BAD_REQUEST)  # nopep8
    context.handle_exception(UserNotFoundInTracimRequest, HTTPStatus.BAD_REQUEST)  # nopep8
    context.handle_exception(ContentNotFoundInTracimRequest, HTTPStatus.BAD_REQUEST)  # nopep8
    context.handle_exception(WorkspaceNotFound, HTTPStatus.BAD_REQUEST)
    context.handle_exception(UserDoesNotExist, HTTPStatus.BAD_REQUEST)
    context.handle_exception(ContentNotFound, HTTPStatus.BAD_REQUEST)
    context.handle_exception(ContentTypeNotAllowed, HTTPStatus.BAD_REQUEST)
    context.handle_exception(InvalidId, HTTPStatus.BAD_REQUEST)
    # Auth exception
    context.handle_exception(NotAuthenticated, HTTPStatus.UNAUTHORIZED)
    context.handle_exception(UserNotActive, HTTPStatus.FORBIDDEN)
    context.handle_exception(AuthenticationFailed, HTTPStatus.FORBIDDEN)
    context.handle_exception(InsufficientUserRoleInWorkspace, HTTPStatus.FORBIDDEN)  # nopep8
    context.handle_exception(InsufficientUserProfile, HTTPStatus.FORBIDDEN)
    # Internal server error
    context.handle_exception(OperationalError, HTTPStatus.INTERNAL_SERVER_ERROR)
    context.handle_exception(Exception, HTTPStatus.INTERNAL_SERVER_ERROR)

    # Add controllers
    session_controller = SessionController()
    system_controller = SystemController()
    user_controller = UserController()
    workspace_controller = WorkspaceController()
    comment_controller = CommentController()
    html_document_controller = HTMLDocumentController()
    thread_controller = ThreadController()
    file_controller = FileController()
    configurator.include(session_controller.bind, route_prefix=BASE_API_V2)
    configurator.include(system_controller.bind, route_prefix=BASE_API_V2)
    configurator.include(user_controller.bind, route_prefix=BASE_API_V2)
    configurator.include(workspace_controller.bind, route_prefix=BASE_API_V2)
    configurator.include(comment_controller.bind, route_prefix=BASE_API_V2)
    configurator.include(html_document_controller.bind, route_prefix=BASE_API_V2)  # nopep8
    configurator.include(thread_controller.bind, route_prefix=BASE_API_V2)
    configurator.include(file_controller.bind, route_prefix=BASE_API_V2)

    hapic.add_documentation_view(
        '/api/v2/doc',
        'Tracim v2 API',
        'API of Tracim v2',
    )
    return configurator.make_wsgi_app()


def webdav(global_config, **local_settings):
    settings = global_config
    settings.update(local_settings)
    app_factory = WebdavAppFactory(
        tracim_config_file_path=settings['__file__'],
    )
    return app_factory.get_wsgi_app()