// (C) Copyright 2015 Moodle Pty Ltd.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import { APP_INITIALIZER, Provider } from '@angular/core';

export function getInitializerProviders(): Provider[] {
    const context = require.context('./', false, /\.ts$/);

    return context.keys().reduce((providers, fileName) => {
        const name = (fileName.match(/^(?:\.\/)?(.+)\.ts$/) || [])[1];

        if (typeof name !== 'undefined' && name !== 'index') {
            providers.push({
                provide: APP_INITIALIZER,
                useValue: context(fileName).default,
                multi: true,
            });
        }

        return providers;
    }, [] as Provider[]);
}