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/*!
* Copyright 2017 Google Inc.
*
* 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 {FirebaseApp, FirebaseAppOptions} from '../firebase-app';
import {Certificate} from '../auth/credential';
import * as validator from './validator';
/**
* Renames properties on an object given a mapping from old to new property names.
*
* For example, this can be used to map underscore_cased properties to camelCase.
*
* @param {object} obj The object whose properties to rename.
* @param {object} keyMap The mapping from old to new property names.
*/
export function renameProperties(obj: object, keyMap: { [key: string]: string }): void {
Object.keys(keyMap).forEach((oldKey) => {
if (oldKey in obj) {
const newKey = keyMap[oldKey];
// The old key's value takes precedence over the new key's value.
obj[newKey] = obj[oldKey];
delete obj[oldKey];
}
});
}
/**
* Defines a new read-only property directly on an object and returns the object.
*
* @param {object} obj The object on which to define the property.
* @param {string} prop The name of the property to be defined or modified.
* @param {any} value The value associated with the property.
*/
export function addReadonlyGetter(obj: object, prop: string, value: any): void {
Object.defineProperty(obj, prop, {
value,
// Make this property read-only.
writable: false,
// Include this property during enumeration of obj's properties.
enumerable: true,
});
}
/**
* Determines the Google Cloud project ID associated with a Firebase app by examining
* the Firebase app options, credentials and the local environment in that order.
*
* @param {FirebaseApp} app A Firebase app to get the project ID from.
*
* @return {string} A project ID string or null.
*/
export function getProjectId(app: FirebaseApp): string {
const options: FirebaseAppOptions = app.options;
if (validator.isNonEmptyString(options.projectId)) {
return options.projectId;
}
const cert: Certificate = options.credential.getCertificate();
if (cert != null && validator.isNonEmptyString(cert.projectId)) {
return cert.projectId;
}
const projectId = process.env.GOOGLE_CLOUD_PROJECT || process.env.GCLOUD_PROJECT;
if (validator.isNonEmptyString(projectId)) {
return projectId;
}
return null;
}
/**
* Encodes data using web-safe-base64.
*
* @param {Buffer} data The raw data byte input.
* @return {string} The base64-encoded result.
*/
export function toWebSafeBase64(data: Buffer): string {
return data.toString('base64').replace(/\//g, '_').replace(/\+/g, '-');
}