function _updateURIFragment()

in index.js [941:998]

• 40 lines of code
• 10 McCabe index (conditional complexity)

function _updateURIFragment () {
  var actions = { proposal: [], search: null, status: [], version: [] }

  var search = document.querySelector('#search-filter')

  if (search.value && search.value.match(/(SE-\d\d\d\d)($|((,SE-\d\d\d\d)+))/i)) {
    actions.proposal = search.value.toUpperCase().split(',')
  } else {
    actions.search = search.value
  }

  var selectedVersions = document.querySelectorAll('.filter-by-swift-version:checked')
  var versions = [].map.call(selectedVersions, function (checkbox) {
    return checkbox.value.split('swift-swift-')[1].split('-').join('.')
  })

  actions.version = versions

  var selectedStatuses = document.querySelectorAll('.filtered-by-status:checked')
  var statuses = [].map.call(selectedStatuses, function (checkbox) {
    var className = checkbox.value

    var correspondingStatus = Object.keys(states).filter(function (status) {
      if (states[status].className === className) return true
      return false
    })[0]

    return states[correspondingStatus].className
  })

  // .implemented is redundant if any specific implementation versions are selected.
  if (actions.version.length) {
    statuses = statuses.filter(function (status) {
      return status !== states['.implemented'].className
    })
  }

  actions.status = statuses

  // build the actual fragment string.
  var fragments = []
  if (actions.proposal.length) fragments.push('proposal=' + actions.proposal.join(','))
  if (actions.status.length) fragments.push('status=' + actions.status.join(','))
  if (actions.version.length) fragments.push('version=' + actions.version.join(','))

  // encoding the search lets you search for `??` and other edge cases.
  if (actions.search) fragments.push('search=' + encodeURIComponent(actions.search))

  if (!fragments.length) {
    window.history.replaceState(null, null, './')
    return
  }

  var fragment = '#?' + fragments.join('&')

  // avoid creating new history entries each time a search or filter updates
  window.history.replaceState(null, null, fragment)
}