63 lines
1.9 KiB
JavaScript
63 lines
1.9 KiB
JavaScript
/*
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* Copyright (C) 2019 Alex Yatskov <alex@foosoft.net>
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* Author: Alex Yatskov <alex@foosoft.net>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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class FrontendApiReceiver {
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constructor(source='', handlers={}) {
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this.source = source;
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this.handlers = handlers;
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chrome.runtime.onConnect.addListener(this.onConnect.bind(this));
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}
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onConnect(port) {
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if (port.name !== 'frontend-api-receiver') { return; }
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port.onMessage.addListener(this.onMessage.bind(this, port));
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}
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onMessage(port, {id, action, params, target, senderId}) {
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if (
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target !== this.source ||
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!this.handlers.hasOwnProperty(action)
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) {
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return;
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}
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this.sendAck(port, id, senderId);
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const handler = this.handlers[action];
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handler(params).then(
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result => {
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this.sendResult(port, id, senderId, {result});
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},
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e => {
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const error = typeof e.toString === 'function' ? e.toString() : e;
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this.sendResult(port, id, senderId, {error});
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});
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}
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sendAck(port, id, senderId) {
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port.postMessage({type: 'ack', id, senderId});
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}
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sendResult(port, id, senderId, data) {
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port.postMessage({type: 'result', id, senderId, data});
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}
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}
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