aaac7fed
 liuqimichale
add
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'use strict';
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = unpackFeature;
var _statuses = require('../lib/statuses');
var _statuses2 = _interopRequireDefault(_statuses);
var _supported = require('../lib/supported');
var _supported2 = _interopRequireDefault(_supported);
var _browsers = require('./browsers');
var _browserVersions = require('./browserVersions');
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
var MATH2LOG = Math.log(2);
function unpackSupport(cipher) {
// bit flags
var stats = Object.keys(_supported2.default).reduce(function (list, support) {
if (cipher & _supported2.default[support]) list.push(support);
return list;
}, []);
// notes
var notes = cipher >> 7;
var notesArray = [];
while (notes) {
var note = Math.floor(Math.log(notes) / MATH2LOG) + 1;
notesArray.unshift('#' + note);
notes -= Math.pow(2, note - 1);
}
return stats.concat(notesArray).join(' ');
}
function unpackFeature(packed) {
var unpacked = { status: _statuses2.default[packed.B], title: packed.C };
unpacked.stats = Object.keys(packed.A).reduce(function (browserStats, key) {
var browser = packed.A[key];
browserStats[_browsers.browsers[key]] = Object.keys(browser).reduce(function (stats, support) {
var packedVersions = browser[support].split(' ');
var unpacked = unpackSupport(support);
packedVersions.forEach(function (v) {
return stats[_browserVersions.browserVersions[v]] = unpacked;
});
return stats;
}, {});
return browserStats;
}, {});
return unpacked;
}
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