gPass/chrome_addon/compat.js

/*
  Copyright (C) 2013-2017 Grégory Soutadé
  
  This file is part of gPass.
  
  gPass 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.
  
  gPass 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 gPass.  If not, see <http://www.gnu.org/licenses/>.
*/

function getPref(key)
{
    // Inspired from https://github.com/akiomik/chrome-storage-promise/
    var promise = new Promise((resolve, reject) => {
        chrome.storage.local.get(key, (items) => {
            let err = chrome.runtime.lastError;
            if (err) {
                reject(err);
            } else {
                resolve(items);
            }
        });
    })
	.then(function (pref) {
	    if (!pref.hasOwnProperty(key))
		return default_preferences[key];
	    return pref[key];
	});

    return promise;
}

function setPref(key, value)
{
    chrome.storage.local.set({key:value}, function ok() {});
}