basant307/AI_Governance_Project

1'use strict'2 3const statuses = require('../lib/statuses')4const supported = require('../lib/supported')5const browsers = require('./browsers').browsers6const versions = require('./browserVersions').browserVersions7 8const MATH2LOG = Math.log(2)9 10function unpackSupport(cipher) {11  // bit flags12  let stats = Object.keys(supported).reduce((list, support) => {13    if (cipher & supported[support]) list.push(support)14    return list15  }, [])16 17  // notes18  let notes = cipher >> 719  let notesArray = []20  while (notes) {21    let note = Math.floor(Math.log(notes) / MATH2LOG) + 122    notesArray.unshift(`#${note}`)23    notes -= Math.pow(2, note - 1)24  }25 26  return stats.concat(notesArray).join(' ')27}28 29function unpackFeature(packed) {30  let unpacked = {31    status: statuses[packed.B],32    title: packed.C,33    shown: packed.D34  }35  unpacked.stats = Object.keys(packed.A).reduce((browserStats, key) => {36    let browser = packed.A[key]37    browserStats[browsers[key]] = Object.keys(browser).reduce(38      (stats, support) => {39        let packedVersions = browser[support].split(' ')40        let unpacked2 = unpackSupport(support)41        packedVersions.forEach(v => (stats[versions[v]] = unpacked2))42        return stats43      },44      {}45    )46    return browserStats47  }, {})48  return unpacked49}50 51module.exports = unpackFeature52module.exports.default = unpackFeature53