/**
 * 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.
 */
/**
 * @classdesc Matches and converts any ISO 639 language tag to BCP-47 language tags
 */
import BaseMatcher from "./base"
import DashConstants from "../constants"
import { bcp47Normalize } from "bcp-47-normalize"

class LangMatcher extends BaseMatcher {
	constructor() {
		super(
			(tagName, attr /*, value*/) => {
				const stringAttrsInElements = {
					[DashConstants.ADAPTATION_SET]: [DashConstants.LANG],
					[DashConstants.REPRESENTATION]: [DashConstants.LANG],
					[DashConstants.CONTENT_COMPONENT]: [DashConstants.LANG],
					[DashConstants.LABEL]: [DashConstants.LANG],
					[DashConstants.GROUP_LABEL]: [DashConstants.LANG],
					// still missing from 23009-1: Preselection@lang, ProgramInformation@lang
				}
				if (stringAttrsInElements.hasOwnProperty(tagName)) {
					let attrNames = stringAttrsInElements[tagName]
					if (attrNames !== undefined) {
						return attrNames.indexOf(attr) >= 0
					} else {
						return false
					}
				}
				return false
			},
			(str) => {
				let lang = bcp47Normalize(str)
				if (lang) {
					return lang
				}
				return String(str)
			},
		)
	}
}

export default LangMatcher
