yomichan/ext/bg/js/audio.js
2020-02-11 22:22:16 -05:00

189 lines
6.7 KiB
JavaScript

/*
* Copyright (C) 2017-2020 Alex Yatskov <alex@foosoft.net>
* Author: Alex Yatskov <alex@foosoft.net>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/*global jpIsStringEntirelyKana, audioGetFromSources*/
const audioUrlBuilders = new Map([
['jpod101', async (definition) => {
let kana = definition.reading;
let kanji = definition.expression;
if (!kana && jpIsStringEntirelyKana(kanji)) {
kana = kanji;
kanji = null;
}
const params = [];
if (kanji) {
params.push(`kanji=${encodeURIComponent(kanji)}`);
}
if (kana) {
params.push(`kana=${encodeURIComponent(kana)}`);
}
return `https://assets.languagepod101.com/dictionary/japanese/audiomp3.php?${params.join('&')}`;
}],
['jpod101-alternate', async (definition) => {
const response = await new Promise((resolve, reject) => {
const xhr = new XMLHttpRequest();
xhr.open('POST', 'https://www.japanesepod101.com/learningcenter/reference/dictionary_post');
xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
xhr.addEventListener('error', () => reject(new Error('Failed to scrape audio data')));
xhr.addEventListener('load', () => resolve(xhr.responseText));
xhr.send(`post=dictionary_reference&match_type=exact&search_query=${encodeURIComponent(definition.expression)}`);
});
const dom = new DOMParser().parseFromString(response, 'text/html');
for (const row of dom.getElementsByClassName('dc-result-row')) {
try {
const url = row.querySelector('audio>source[src]').getAttribute('src');
const reading = row.getElementsByClassName('dc-vocab_kana').item(0).innerText;
if (url && reading && (!definition.reading || definition.reading === reading)) {
return audioUrlNormalize(url, 'https://www.japanesepod101.com', '/learningcenter/reference/');
}
} catch (e) {
// NOP
}
}
throw new Error('Failed to find audio URL');
}],
['jisho', async (definition) => {
const response = await new Promise((resolve, reject) => {
const xhr = new XMLHttpRequest();
xhr.open('GET', `https://jisho.org/search/${definition.expression}`);
xhr.addEventListener('error', () => reject(new Error('Failed to scrape audio data')));
xhr.addEventListener('load', () => resolve(xhr.responseText));
xhr.send();
});
const dom = new DOMParser().parseFromString(response, 'text/html');
try {
const audio = dom.getElementById(`audio_${definition.expression}:${definition.reading}`);
if (audio !== null) {
const url = audio.getElementsByTagName('source').item(0).getAttribute('src');
if (url) {
return audioUrlNormalize(url, 'https://jisho.org', '/search/');
}
}
} catch (e) {
// NOP
}
throw new Error('Failed to find audio URL');
}],
['text-to-speech', async (definition, options) => {
const voiceURI = options.audio.textToSpeechVoice;
if (!voiceURI) {
throw new Error('No voice');
}
return `tts:?text=${encodeURIComponent(definition.expression)}&voice=${encodeURIComponent(voiceURI)}`;
}],
['text-to-speech-reading', async (definition, options) => {
const voiceURI = options.audio.textToSpeechVoice;
if (!voiceURI) {
throw new Error('No voice');
}
return `tts:?text=${encodeURIComponent(definition.reading || definition.expression)}&voice=${encodeURIComponent(voiceURI)}`;
}],
['custom', async (definition, options) => {
const customSourceUrl = options.audio.customSourceUrl;
return customSourceUrl.replace(/\{([^}]*)\}/g, (m0, m1) => (hasOwn(definition, m1) ? `${definition[m1]}` : m0));
}]
]);
async function audioGetUrl(definition, mode, options, download) {
const handler = audioUrlBuilders.get(mode);
if (typeof handler === 'function') {
try {
return await handler(definition, options, download);
} catch (e) {
// NOP
}
}
return null;
}
function audioUrlNormalize(url, baseUrl, basePath) {
if (url) {
if (url[0] === '/') {
if (url.length >= 2 && url[1] === '/') {
// Begins with "//"
url = baseUrl.substring(0, baseUrl.indexOf(':') + 1) + url;
} else {
// Begins with "/"
url = baseUrl + url;
}
} else if (!/^[a-z][a-z0-9\-+.]*:/i.test(url)) {
// No URI scheme => relative path
url = baseUrl + basePath + url;
}
}
return url;
}
function audioBuildFilename(definition) {
if (definition.reading || definition.expression) {
let filename = 'yomichan';
if (definition.reading) {
filename += `_${definition.reading}`;
}
if (definition.expression) {
filename += `_${definition.expression}`;
}
return filename += '.mp3';
}
return null;
}
async function audioInject(definition, fields, sources, optionsContext) {
let usesAudio = false;
for (const name in fields) {
if (fields[name].includes('{audio}')) {
usesAudio = true;
break;
}
}
if (!usesAudio) {
return true;
}
try {
let audioSourceDefinition = definition;
if (hasOwn(definition, 'expressions')) {
audioSourceDefinition = definition.expressions[0];
}
const {url} = await audioGetFromSources(audioSourceDefinition, sources, optionsContext, true);
if (url !== null) {
const filename = audioBuildFilename(audioSourceDefinition);
if (filename !== null) {
definition.audio = {url, filename};
}
}
return true;
} catch (e) {
return false;
}
}