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/*
* Copyright (C) 2023 Yomitan Authors
* Copyright (C) 2021-2022 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 {generateId} from '../core.js';
/**
* Class used for loading and validating media from a worker thread
* during the dictionary import process.
*/
export class DictionaryWorkerMediaLoader {
/**
* Creates a new instance of the media loader.
*/
constructor() {
/** @type {Map<string, {resolve: (result: import('dictionary-worker-media-loader').ImageDetails) => void, reject: (reason?: import('core').RejectionReason) => void}>} */
this._requests = new Map();
}
/**
* Handles a response message posted to the worker thread.
* @param {import('dictionary-worker-media-loader').HandleMessageParams} params Details of the response.
*/
handleMessage(params) {
const {id} = params;
const request = this._requests.get(id);
if (typeof request === 'undefined') { return; }
this._requests.delete(id);
const {error} = params;
if (typeof error !== 'undefined') {
request.reject(ExtensionError.deserialize(error));
} else {
request.resolve(params.result);
}
}
/** @type {import('dictionary-importer-media-loader').GetImageDetailsFunction} */
getImageDetails(content, mediaType) {
return new Promise((resolve, reject) => {
const id = generateId(16);
this._requests.set(id, {resolve, reject});
// This is executed in a Worker context, so the self needs to be force cast
/** @type {Worker} */ (/** @type {unknown} */ (self)).postMessage({
action: 'getImageDetails',
params: {id, content, mediaType}
}, [content]);
});
}
}
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