ext.py

# -*- coding: utf-8 -*-
#
# This file is part of Invenio.
# Copyright (C) 2016-2019 CERN.
#
# Invenio is free software; you can redistribute it and/or modify it
# under the terms of the MIT License; see LICENSE file for more details.

"""Module for depositing record metadata and uploading files."""

from __future__ import absolute_import, print_function

from collections import defaultdict

from invenio_records_rest import utils
from werkzeug.utils import cached_property

from . import config
from .receivers import index_deposit_after_publish
from .signals import post_action
from .views import rest, ui


class _DepositState(object):
    """Deposit state."""

    def __init__(self, app):
        """Initialize state."""
        self.app = app

    @cached_property
    def jsonschemas(self):
        """Load deposit JSON schemas."""
        _jsonschemas = {
            k: v['jsonschema']
            for k, v in self.app.config['DEPOSIT_RECORDS_UI_ENDPOINTS'].items()
            if 'jsonschema' in v
        }
        return defaultdict(
            lambda: self.app.config['DEPOSIT_DEFAULT_JSONSCHEMA'], _jsonschemas
        )

    @cached_property
    def schemaforms(self):
        """Load deposit schema forms."""
        _schemaforms = {
            k: v['schemaform']
            for k, v in self.app.config['DEPOSIT_RECORDS_UI_ENDPOINTS'].items()
            if 'schemaform' in v
        }
        return defaultdict(
            lambda: self.app.config['DEPOSIT_DEFAULT_SCHEMAFORM'], _schemaforms
        )


class InvenioDeposit(object):
    """Invenio-Deposit extension."""

    def __init__(self, app=None):
        """Extension initialization."""
        if app:
            self.init_app(app)

    def init_app(self, app):
        """Flask application initialization.

        Initialize the UI endpoints.  Connect all signals if
        `DEPOSIT_REGISTER_SIGNALS` is ``True``.

        :param app: An instance of :class:`flask.Flask`.
        """
        self.init_config(app)
        app.register_blueprint(ui.create_blueprint(
            app.config['DEPOSIT_RECORDS_UI_ENDPOINTS']
        ))
        app.extensions['invenio-deposit'] = _DepositState(app)
        if app.config['DEPOSIT_REGISTER_SIGNALS']:
            post_action.connect(index_deposit_after_publish, sender=app,
                                weak=False)

    def init_config(self, app):
        """Initialize configuration.

        :param app: An instance of :class:`flask.Flask`.
        """
        app.config.setdefault(
            'DEPOSIT_BASE_TEMPLATE',
            app.config.get('BASE_TEMPLATE',
                           'invenio_deposit/base.html'))
        for k in dir(config):
            if k.startswith('DEPOSIT_'):
                app.config.setdefault(k, getattr(config, k))


class InvenioDepositREST(object):
    """Invenio-Deposit REST extension."""

    def __init__(self, app=None):
        """Extension initialization.

        :param app: An instance of :class:`flask.Flask`.
        """
        if app:
            self.init_app(app)

    def init_app(self, app):
        """Flask application initialization.

        Initialize the REST endpoints.  Connect all signals if
        `DEPOSIT_REGISTER_SIGNALS` is True.

        :param app: An instance of :class:`flask.Flask`.
        """
        self.init_config(app)
        blueprint = rest.create_blueprint(
            app.config['DEPOSIT_REST_ENDPOINTS']
        )

        # FIXME: This is a temporary fix. This means that
        # invenio-records-rest's endpoint_prefixes cannot be used before
        # the first request or in other processes, ex: Celery tasks.
        @app.before_first_request
        def extend_default_endpoint_prefixes():
            """Extend redirects between PID types."""
            endpoint_prefixes = utils.build_default_endpoint_prefixes(
                dict(app.config['DEPOSIT_REST_ENDPOINTS'])
            )
            current_records_rest = app.extensions['invenio-records-rest']
            overlap = set(endpoint_prefixes.keys()) & set(
                current_records_rest.default_endpoint_prefixes
            )
            if overlap:
                raise RuntimeError(
                    'Deposit wants to override endpoint prefixes {0}.'.format(
                        ', '.join(overlap)
                    )
                )
            current_records_rest.default_endpoint_prefixes.update(
                endpoint_prefixes
            )

        app.register_blueprint(blueprint)
        app.extensions['invenio-deposit-rest'] = _DepositState(app)
        if app.config['DEPOSIT_REGISTER_SIGNALS']:
            post_action.connect(index_deposit_after_publish, sender=app,
                                weak=False)

    def init_config(self, app):
        """Initialize configuration.

        :param app: An instance of :class:`flask.Flask`.
        """
        for k in dir(config):
            if k.startswith('DEPOSIT_'):
                app.config.setdefault(k, getattr(config, k))