aboutsummaryrefslogtreecommitdiff
path: root/ext/js/media/audio-downloader.js
blob: 3a3b21d0b7bdb99a66b315e1498b2881d4d27233 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
/*
 * Copyright (C) 2023-2024  Yomitan Authors
 * Copyright (C) 2017-2022  Yomichan Authors
 *
 * 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/>.
 */

import {RequestBuilder} from '../background/request-builder.js';
import {ExtensionError} from '../core/extension-error.js';
import {readResponseJson} from '../core/json.js';
import {JsonSchema} from '../data/json-schema.js';
import {ArrayBufferUtil} from '../data/sandbox/array-buffer-util.js';
import {NativeSimpleDOMParser} from '../dom/native-simple-dom-parser.js';
import {SimpleDOMParser} from '../dom/simple-dom-parser.js';

export class AudioDownloader {
    /**
     * @param {{japaneseUtil: import('../language/sandbox/japanese-util.js').JapaneseUtil, requestBuilder: RequestBuilder}} details
     */
    constructor({japaneseUtil, requestBuilder}) {
        /** @type {import('../language/sandbox/japanese-util.js').JapaneseUtil} */
        this._japaneseUtil = japaneseUtil;
        /** @type {RequestBuilder} */
        this._requestBuilder = requestBuilder;
        /** @type {?JsonSchema} */
        this._customAudioListSchema = null;
        /** @type {Map<import('settings').AudioSourceType, import('audio-downloader').GetInfoHandler>} */
        this._getInfoHandlers = new Map(/** @type {[name: import('settings').AudioSourceType, handler: import('audio-downloader').GetInfoHandler][]} */ ([
            ['jpod101', this._getInfoJpod101.bind(this)],
            ['jpod101-alternate', this._getInfoJpod101Alternate.bind(this)],
            ['jisho', this._getInfoJisho.bind(this)],
            ['text-to-speech', this._getInfoTextToSpeech.bind(this)],
            ['text-to-speech-reading', this._getInfoTextToSpeechReading.bind(this)],
            ['custom', this._getInfoCustom.bind(this)],
            ['custom-json', this._getInfoCustomJson.bind(this)]
        ]));
    }

    /**
     * @param {import('audio').AudioSourceInfo} source
     * @param {string} term
     * @param {string} reading
     * @returns {Promise<import('audio-downloader').Info[]>}
     */
    async getTermAudioInfoList(source, term, reading) {
        const handler = this._getInfoHandlers.get(source.type);
        if (typeof handler === 'function') {
            try {
                return await handler(term, reading, source);
            } catch (e) {
                // NOP
            }
        }
        return [];
    }

    /**
     * @param {import('audio').AudioSourceInfo[]} sources
     * @param {?number} preferredAudioIndex
     * @param {string} term
     * @param {string} reading
     * @param {?number} idleTimeout
     * @returns {Promise<import('audio-downloader').AudioBinaryBase64>}
     */
    async downloadTermAudio(sources, preferredAudioIndex, term, reading, idleTimeout) {
        const errors = [];
        for (const source of sources) {
            let infoList = await this.getTermAudioInfoList(source, term, reading);
            if (typeof preferredAudioIndex === 'number') {
                infoList = (preferredAudioIndex >= 0 && preferredAudioIndex < infoList.length ? [infoList[preferredAudioIndex]] : []);
            }
            for (const info of infoList) {
                switch (info.type) {
                    case 'url':
                        try {
                            return await this._downloadAudioFromUrl(info.url, source.type, idleTimeout);
                        } catch (e) {
                            errors.push(e);
                        }
                        break;
                }
            }
        }

        const error = new ExtensionError('Could not download audio');
        error.data = {errors};
        throw error;
    }

    // Private

    /**
     * @param {string} url
     * @param {string} base
     * @returns {string}
     */
    _normalizeUrl(url, base) {
        return new URL(url, base).href;
    }

    /** @type {import('audio-downloader').GetInfoHandler} */
    async _getInfoJpod101(term, reading) {
        if (reading === term && this._japaneseUtil.isStringEntirelyKana(term)) {
            reading = term;
            term = '';
        }

        const params = new URLSearchParams();
        if (term.length > 0) {
            params.set('kanji', term);
        }
        if (reading.length > 0) {
            params.set('kana', reading);
        }

        const url = `https://assets.languagepod101.com/dictionary/japanese/audiomp3.php?${params.toString()}`;
        return [{type: 'url', url}];
    }

    /** @type {import('audio-downloader').GetInfoHandler} */
    async _getInfoJpod101Alternate(term, reading) {
        const fetchUrl = 'https://www.japanesepod101.com/learningcenter/reference/dictionary_post';
        const data = new URLSearchParams({
            post: 'dictionary_reference',
            match_type: 'exact',
            search_query: term,
            vulgar: 'true'
        });
        const response = await this._requestBuilder.fetchAnonymous(fetchUrl, {
            method: 'POST',
            mode: 'cors',
            cache: 'default',
            credentials: 'omit',
            redirect: 'follow',
            referrerPolicy: 'no-referrer',
            headers: {
                'Content-Type': 'application/x-www-form-urlencoded'
            },
            body: data
        });
        const responseText = await response.text();

        const dom = this._createSimpleDOMParser(responseText);
        for (const row of dom.getElementsByClassName('dc-result-row')) {
            try {
                const audio = dom.getElementByTagName('audio', row);
                if (audio === null) { continue; }

                const source = dom.getElementByTagName('source', audio);
                if (source === null) { continue; }

                let url = dom.getAttribute(source, 'src');
                if (url === null) { continue; }

                const htmlReadings = dom.getElementsByClassName('dc-vocab_kana');
                if (htmlReadings.length === 0) { continue; }

                const htmlReading = dom.getTextContent(htmlReadings[0]);
                if (htmlReading && (reading === term || reading === htmlReading)) {
                    url = this._normalizeUrl(url, response.url);
                    return [{type: 'url', url}];
                }
            } catch (e) {
                // NOP
            }
        }

        throw new Error('Failed to find audio URL');
    }

    /** @type {import('audio-downloader').GetInfoHandler} */
    async _getInfoJisho(term, reading) {
        const fetchUrl = `https://jisho.org/search/${term}`;
        const response = await this._requestBuilder.fetchAnonymous(fetchUrl, {
            method: 'GET',
            mode: 'cors',
            cache: 'default',
            credentials: 'omit',
            redirect: 'follow',
            referrerPolicy: 'no-referrer'
        });
        const responseText = await response.text();

        const dom = this._createSimpleDOMParser(responseText);
        try {
            const audio = dom.getElementById(`audio_${term}:${reading}`);
            if (audio !== null) {
                const source = dom.getElementByTagName('source', audio);
                if (source !== null) {
                    let url = dom.getAttribute(source, 'src');
                    if (url !== null) {
                        url = this._normalizeUrl(url, response.url);
                        return [{type: 'url', url}];
                    }
                }
            }
        } catch (e) {
            // NOP
        }

        throw new Error('Failed to find audio URL');
    }

    /** @type {import('audio-downloader').GetInfoHandler} */
    async _getInfoTextToSpeech(term, reading, details) {
        if (typeof details !== 'object' || details === null) {
            throw new Error('Invalid arguments');
        }
        const {voice} = details;
        if (typeof voice !== 'string') {
            throw new Error('Invalid voice');
        }
        return [{type: 'tts', text: term, voice: voice}];
    }

    /** @type {import('audio-downloader').GetInfoHandler} */
    async _getInfoTextToSpeechReading(term, reading, details) {
        if (typeof details !== 'object' || details === null) {
            throw new Error('Invalid arguments');
        }
        const {voice} = details;
        if (typeof voice !== 'string') {
            throw new Error('Invalid voice');
        }
        return [{type: 'tts', text: reading, voice: voice}];
    }

    /** @type {import('audio-downloader').GetInfoHandler} */
    async _getInfoCustom(term, reading, details) {
        if (typeof details !== 'object' || details === null) {
            throw new Error('Invalid arguments');
        }
        let {url} = details;
        if (typeof url !== 'string') {
            throw new Error('Invalid url');
        }
        url = this._getCustomUrl(term, reading, url);
        return [{type: 'url', url}];
    }

    /** @type {import('audio-downloader').GetInfoHandler} */
    async _getInfoCustomJson(term, reading, details) {
        if (typeof details !== 'object' || details === null) {
            throw new Error('Invalid arguments');
        }
        let {url} = details;
        if (typeof url !== 'string') {
            throw new Error('Invalid url');
        }
        url = this._getCustomUrl(term, reading, url);

        const response = await this._requestBuilder.fetchAnonymous(url, {
            method: 'GET',
            mode: 'cors',
            cache: 'default',
            credentials: 'omit',
            redirect: 'follow',
            referrerPolicy: 'no-referrer'
        });

        if (!response.ok) {
            throw new Error(`Invalid response: ${response.status}`);
        }

        /** @type {import('audio-downloader').CustomAudioList} */
        const responseJson = await readResponseJson(response);

        if (this._customAudioListSchema === null) {
            const schema = await this._getCustomAudioListSchema();
            this._customAudioListSchema = new JsonSchema(/** @type {import('ext/json-schema').Schema} */ (schema));
        }
        this._customAudioListSchema.validate(responseJson);

        /** @type {import('audio-downloader').Info[]} */
        const results = [];
        for (const {url: url2, name} of responseJson.audioSources) {
            /** @type {import('audio-downloader').Info1} */
            const info = {type: 'url', url: url2};
            if (typeof name === 'string') { info.name = name; }
            results.push(info);
        }
        return results;
    }

    /**
     * @param {string} term
     * @param {string} reading
     * @param {string} url
     * @returns {string}
     * @throws {Error}
     */
    _getCustomUrl(term, reading, url) {
        if (typeof url !== 'string') {
            throw new Error('No custom URL defined');
        }
        const data = {term, reading};
        return url.replace(/\{([^}]*)\}/g, (m0, m1) => (Object.prototype.hasOwnProperty.call(data, m1) ? `${data[/** @type {'term'|'reading'} */ (m1)]}` : m0));
    }

    /**
     * @param {string} url
     * @param {import('settings').AudioSourceType} sourceType
     * @param {?number} idleTimeout
     * @returns {Promise<import('audio-downloader').AudioBinaryBase64>}
     */
    async _downloadAudioFromUrl(url, sourceType, idleTimeout) {
        let signal;
        /** @type {?import('request-builder.js').ProgressCallback} */
        let onProgress = null;
        /** @type {?import('core').Timeout} */
        let idleTimer = null;
        if (typeof idleTimeout === 'number') {
            const abortController = new AbortController();
            ({signal} = abortController);
            const onIdleTimeout = () => {
                abortController.abort('Idle timeout');
            };
            onProgress = (done) => {
                if (idleTimer !== null) {
                    clearTimeout(idleTimer);
                }
                idleTimer = done ? null : setTimeout(onIdleTimeout, idleTimeout);
            };
            idleTimer = setTimeout(onIdleTimeout, idleTimeout);
        }

        const response = await this._requestBuilder.fetchAnonymous(url, {
            method: 'GET',
            mode: 'cors',
            cache: 'default',
            credentials: 'omit',
            redirect: 'follow',
            referrerPolicy: 'no-referrer',
            signal
        });

        if (!response.ok) {
            throw new Error(`Invalid response: ${response.status}`);
        }

        const arrayBuffer = await RequestBuilder.readFetchResponseArrayBuffer(response, onProgress);

        if (idleTimer !== null) {
            clearTimeout(idleTimer);
        }

        if (!await this._isAudioBinaryValid(arrayBuffer, sourceType)) {
            throw new Error('Could not retrieve audio');
        }

        const data = ArrayBufferUtil.arrayBufferToBase64(arrayBuffer);
        const contentType = response.headers.get('Content-Type');
        return {data, contentType};
    }

    /**
     * @param {ArrayBuffer} arrayBuffer
     * @param {import('settings').AudioSourceType} sourceType
     * @returns {Promise<boolean>}
     */
    async _isAudioBinaryValid(arrayBuffer, sourceType) {
        switch (sourceType) {
            case 'jpod101':
            {
                const digest = await this._arrayBufferDigest(arrayBuffer);
                switch (digest) {
                    case 'ae6398b5a27bc8c0a771df6c907ade794be15518174773c58c7c7ddd17098906': // Invalid audio
                        return false;
                    default:
                        return true;
                }
            }
            default:
                return true;
        }
    }

    /**
     * @param {ArrayBuffer} arrayBuffer
     * @returns {Promise<string>}
     */
    async _arrayBufferDigest(arrayBuffer) {
        const hash = new Uint8Array(await crypto.subtle.digest('SHA-256', new Uint8Array(arrayBuffer)));
        let digest = '';
        for (const byte of hash) {
            digest += byte.toString(16).padStart(2, '0');
        }
        return digest;
    }

    /**
     * @param {string} content
     * @returns {import('simple-dom-parser').ISimpleDomParser}
     * @throws {Error}
     */
    _createSimpleDOMParser(content) {
        if (typeof NativeSimpleDOMParser !== 'undefined' && NativeSimpleDOMParser.isSupported()) {
            return new NativeSimpleDOMParser(content);
        } else if (typeof SimpleDOMParser !== 'undefined' && SimpleDOMParser.isSupported()) {
            return new SimpleDOMParser(content);
        } else {
            throw new Error('DOM parsing not supported');
        }
    }

    /**
     * @returns {Promise<unknown>}
     */
    async _getCustomAudioListSchema() {
        const url = chrome.runtime.getURL('/data/schemas/custom-audio-list-schema.json');
        const response = await fetch(url, {
            method: 'GET',
            mode: 'no-cors',
            cache: 'default',
            credentials: 'omit',
            redirect: 'follow',
            referrerPolicy: 'no-referrer'
        });
        return await readResponseJson(response);
    }
}