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/*
* Copyright (C) 2024 Yomitan 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 {EventDispatcher} from '../core/event-dispatcher.js';
import {toError} from '../core/to-error.js';
/**
* @augments EventDispatcher<import('web-extension').Events>
*/
export class WebExtension extends EventDispatcher {
constructor() {
super();
/** @type {boolean} */
this._unloaded = false;
/** @type {?string} */
this._extensionBaseUrl = null;
try {
this._extensionBaseUrl = this.getUrl('/');
} catch (e) {
// NOP
}
}
/** @type {boolean} */
get unloaded() {
return this._unloaded;
}
/**
* @param {string} path
* @returns {string}
*/
getUrl(path) {
return chrome.runtime.getURL(path);
}
/**
* @param {unknown} message
* @param {(response: unknown) => void} responseCallback
* @throws {Error}
*/
sendMessage(message, responseCallback) {
try {
chrome.runtime.sendMessage(message, responseCallback);
} catch (error) {
this.triggerUnloaded();
throw toError(error);
}
}
/**
* @param {unknown} message
* @returns {Promise<unknown>}
*/
sendMessagePromise(message) {
return new Promise((resolve, reject) => {
try {
this.sendMessage(message, (response) => {
const error = this.getLastError();
if (error !== null) {
reject(error);
} else {
resolve(response);
}
});
} catch (error) {
reject(error);
}
});
}
/**
* @param {unknown} message
*/
sendMessageIgnoreResponse(message) {
this.sendMessage(message, () => {
// Clear the last error
this.getLastError();
});
}
/**
* @returns {?Error}
*/
getLastError() {
const {lastError} = chrome.runtime;
if (lastError) {
if (lastError instanceof Error) { return lastError; }
const {message} = lastError;
return new Error(typeof message === 'string' ? message : 'An unknown web extension error occured');
}
return null;
}
/** */
triggerUnloaded() {
if (this._unloaded) { return; }
this._unloaded = true;
this.trigger('unloaded', {});
}
/**
* Checks whether or not a URL is an extension URL.
* @param {string} url The URL to check.
* @returns {boolean} `true` if the URL is an extension URL, `false` otherwise.
*/
isExtensionUrl(url) {
return this._extensionBaseUrl !== null && url.startsWith(this._extensionBaseUrl);
}
}
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