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* The copyright in this software is being made available under the BSD License,
* included below. This software may be subject to other third party and contributor
* rights, including patent rights, and no such rights are granted under this license.
*
* Copyright (c) 2013, Dash Industry Forum.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
* * Neither the name of Dash Industry Forum nor the names of its
* contributors may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS AS IS AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
import DashConstants from '../constants/DashConstants.js';
import FactoryMaker from '../../core/FactoryMaker.js';
import Debug from '../../core/Debug.js';
import SimpleXPath from '../vo/SimpleXPath.js';
import PatchOperation from '../vo/PatchOperation.js';
function PatchManifestModel() {
let instance,
logger;
const context = this.context;
function setup() {
logger = Debug(context).getInstance().getLogger(instance);
}
function getIsPatch(patch) {
return patch && patch.hasOwnProperty(DashConstants.ORIGINAL_MPD_ID) || false;
}
function getPublishTime(patch) {
return patch && patch.hasOwnProperty(DashConstants.PUBLISH_TIME) ? new Date(patch[DashConstants.PUBLISH_TIME]) : null;
}
function getOriginalPublishTime(patch) {
return patch && patch.hasOwnProperty(DashConstants.ORIGINAL_PUBLISH_TIME) ? new Date(patch[DashConstants.ORIGINAL_PUBLISH_TIME]) : null;
}
function getMpdId(patch) {
return (patch && patch[DashConstants.ORIGINAL_MPD_ID]) || null;
}
function getPatchOperations(patch) {
if (!patch) {
return [];
}
// Go through the patch operations in order and parse their actions out for usage
return (patch.__children || []).map((node) => {
const action = node.tagName;
// we only look add add/remove/replace actions
if (action !== 'add' && action !== 'remove' && action !== 'replace') {
logger.warn(`Ignoring node of invalid action: ${action}`);
return null;
}
let selector = node.sel;
// add action can have special targeting via the 'type' attribute
if (action === 'add' && node.type) {
if (!node.type.startsWith('@')) {
logger.warn(`Ignoring add action for prefixed namespace declaration: ${node.type}=${node.__text}`);
return null;
}
// for our purposes adding/replacing attribute are equivalent and we can normalize
// our processing logic by appending the attribute to the selector path
selector = `${selector}/${node.type}`;
}
let xpath = new SimpleXPath(selector);
if (!xpath.isValid()) {
logger.warn(`Ignoring action with invalid selector: ${action} - ${selector}`);
return null;
}
let value = null;
if (xpath.findsAttribute() || xpath.findsTextReplace()) {
value = node.__text || '';
} else if (action !== 'remove') {
value = node.__children.reduce((groups, child) => {
let key = child.tagName;
// we also ignore
if (key !== '#text') {
groups[key] = groups[key] || [];
groups[key].push(child);
}
return groups;
}, {});
}
let operation = new PatchOperation(action, xpath, value);
if (action === 'add') {
operation.position = node.pos;
}
return operation;
}).filter((operation) => !!operation);
}
instance = {
getIsPatch,
getMpdId,
getOriginalPublishTime,
getPatchOperations,
getPublishTime
};
setup();
return instance;
}
PatchManifestModel.__dashjs_factory_name = 'PatchManifestModel';
export default FactoryMaker.getSingletonFactory(PatchManifestModel);
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