mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-23 17:27:16 +03:00
Sandra Lokshina
6b1ca2d229
Other contributors: - @joeyparrish - @michellezhuogg - @TheModMaker - @theodab - @vaage Change-Id: If6df33d9ab5035d1ead4402004f7de37ee8470f4
100 lines
3.5 KiB
JavaScript
100 lines
3.5 KiB
JavaScript
/**
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* @license
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* Copyright 2016 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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goog.provide('shaka.util.ConfigUtils');
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goog.require('goog.asserts');
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goog.require('shaka.log');
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/**
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* @param {!Object} destination
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* @param {!Object} source
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* @param {!Object} template supplies default values
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* @param {!Object} overrides
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* Supplies override type checking. When the current path matches the key in
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* this object, each sub-value must match the type in this object. If this
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* contains an Object, it is used as the template.
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* @param {string} path to this part of the config
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* @return {boolean}
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* @export
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*/
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shaka.util.ConfigUtils.mergeConfigObjects =
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function(destination, source, template, overrides, path) {
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goog.asserts.assert(destination, 'Destination config must not be null!');
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/**
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* @type {boolean}
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* If true, don't validate the keys in the next level.
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*/
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let ignoreKeys = path in overrides;
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let isValid = true;
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for (let k in source) {
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let subPath = path + '.' + k;
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let subTemplate = ignoreKeys ? overrides[path] : template[k];
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// The order of these checks is important.
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if (!ignoreKeys && !(k in template)) {
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shaka.log.error('Invalid config, unrecognized key ' + subPath);
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isValid = false;
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} else if (source[k] === undefined) {
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// An explicit 'undefined' value causes the key to be deleted from the
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// destination config and replaced with a default from the template if
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// possible.
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if (subTemplate === undefined || ignoreKeys) {
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// There is nothing in the template, so delete.
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delete destination[k];
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} else {
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// There is something in the template, so go back to that.
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destination[k] = shaka.util.ObjectUtils.cloneObject(subTemplate);
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}
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} else if (subTemplate.constructor == Object &&
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source[k] &&
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source[k].constructor == Object) {
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// These are plain Objects with no other constructor.
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if (!destination[k]) {
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// Initialize the destination with the template so that normal merging
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// and type-checking can happen.
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destination[k] = shaka.util.ObjectUtils.cloneObject(subTemplate);
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}
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let subMergeValid = shaka.util.ConfigUtils.mergeConfigObjects(
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destination[k], source[k], subTemplate, overrides, subPath);
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isValid = isValid && subMergeValid;
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} else if (typeof source[k] != typeof subTemplate ||
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source[k] == null ||
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source[k].constructor != subTemplate.constructor) {
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// The source is the wrong type. This check allows objects to be nulled,
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// but does not allow null for any non-object fields.
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shaka.log.error('Invalid config, wrong type for ' + subPath);
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isValid = false;
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} else if (typeof template[k] == 'function' &&
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template[k].length != source[k].length) {
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shaka.log.warning(
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'Invalid config, wrong number of arguments for ' + subPath);
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destination[k] = source[k];
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} else {
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destination[k] = source[k];
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}
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}
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return isValid;
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};
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