Refactor Travis.Helpers to prepare it for ES6 modules

In order to make it easy to switch to ember-cli I'm starting changing a series
of refactorings that will prepare the codebase to the switch. Here I'm:

1. Assign all of the external objects and functions to variables in order to
   make it easy to change them to imports in the feature
2. Extract functions from Travis.Helpers into local functions and create the
   object at the end of file to prepare it for exporting

assets/scripts/app/helpers/helpers.coffee

@@ -1,40 +1,49 @@
 require 'config/emoij'
 
-@Travis.Helpers =
+config_keys_map = Travis.CONFIG_KEYS_MAP
-  COLORS:
+config = Travis.config
+githubCommitUrl = Travis.Urls.githubCommit
+currentDate = Travis.currentDate
+timeago = $.timeago
+intersect = $.intersect
+only = $.only
+mapObject = $.map
+
+colors = {
   default:  'yellow'
   passed:   'green'
   failed:   'red'
   errored:  'gray'
   canceled: 'gray'
+}
 
-  compact: (object) ->
+compact = (object) ->
   result = {}
-    (result[key] = value unless $.isEmpty(value)) for key, value of object || {}
+  (result[key] = value unless Ember.isEmpty(value)) for key, value of object || {}
   result
 
-  safe: (string) ->
+safe = (string) ->
-    new Handlebars.SafeString(string)
+  new Ember.Handlebars.SafeString(string)
 
-  colorForState: (state) ->
+colorForState = (state) ->
-    Travis.Helpers.COLORS[state] || Travis.Helpers.COLORS['default']
+  colors[state] || colors['default']
 
-  formatCommit: (sha, branch) ->
+formatCommit = (sha, branch) ->
-    Travis.Helpers.formatSha(sha) + if branch then " (#{branch})" else ''
+  formatSha(sha) + if branch then " (#{branch})" else ''
 
-  formatSha: (sha) ->
+formatSha = (sha) ->
   (sha || '').substr(0, 7)
 
-  formatConfig: (config) ->
+formatConfig = (config) ->
-    config = $.only config, Object.keys(Travis.CONFIG_KEYS_MAP)
+  config = only config, Object.keys(config_keys_map)
-    values = $.map config, (value, key) ->
+  values = mapObject config, (value, key) ->
     value = (if value && value.join then value.join(', ') else value) || ''
     if key == 'rvm' && "#{value}".match(/^\d+$/)
       value = "#{value}.0"
-      '%@: %@'.fmt Travis.CONFIG_KEYS_MAP[key], value
+    '%@: %@'.fmt config_keys_map[key], value
   if values.length == 0 then '-' else values.join(', ')
 
-  formatMessage: (message, options) ->
+formatMessage = (message, options) ->
   message = message || ''
   message = message.split(/\n/)[0]  if options.short
   message = @_emojize(@_escape(message))
@@ -44,18 +53,18 @@ require 'config/emoij'
     message = message.replace /\n/g, '<br/>'
   message
 
-  pathFrom: (url) ->
+pathFrom = (url) ->
   (url || '').split('/').pop()
 
-  timeAgoInWords: (date) ->
+timeAgoInWords = (date) ->
-    $.timeago.distanceInWords date
+  timeago.distanceInWords date
 
-  durationFrom: (started, finished) ->
+durationFrom = (started, finished) ->
   started = started and @_toUtc(new Date(@_normalizeDateString(started)))
   finished = if finished then @_toUtc(new Date(@_normalizeDateString(finished))) else @_nowUtc()
   if started && finished then Math.round((finished - started) / 1000) else 0
 
-  timeInWords: (duration) ->
+timeInWords = (duration) ->
   days = Math.floor(duration / 86400)
   hours = Math.floor(duration % 86400 / 3600)
   minutes = Math.floor(duration % 3600 / 60)
@@ -71,7 +80,7 @@ require 'config/emoij'
     result.push seconds + ' sec'  if seconds > 0
     if result.length > 0 then result.join(' ') else '-'
 
-  githubify: (text, owner, repo) ->
+githubify = (text, owner, repo) ->
   self = this
   text = text.replace @_githubReferenceRegexp, (reference, matchedOwner, matchedRepo, matchedNumber) ->
     self._githubReferenceLink(reference, { owner: owner, repo: repo }, { owner: matchedOwner, repo: matchedRepo, number: matchedNumber } )
@@ -81,51 +90,77 @@ require 'config/emoij'
     self._githubCommitReferenceLink(reference, { owner: owner, repo: repo }, { owner: matchedOwner, repo: matchedRepo, sha: matchedSHA })
   text
 
-  _githubReferenceRegexp: new RegExp("([\\w-]+)?\\/?([\\w-]+)?(?:#|gh-)(\\d+)", 'g')
+_githubReferenceRegexp = new RegExp("([\\w-]+)?\\/?([\\w-]+)?(?:#|gh-)(\\d+)", 'g')
 
-  _githubReferenceLink: (reference, current, matched) ->
+_githubReferenceLink = (reference, current, matched) ->
   owner = matched.owner || current.owner
   repo = matched.repo || current.repo
-    "<a href=\"#{Travis.config.source_endpoint}/#{owner}/#{repo}/issues/#{matched.number}\">#{reference}</a>"
+  "<a href=\"#{config.source_endpoint}/#{owner}/#{repo}/issues/#{matched.number}\">#{reference}</a>"
 
-  _githubUserRegexp: new RegExp("\\B@([\\w-]+)", 'g')
+_githubUserRegexp = new RegExp("\\B@([\\w-]+)", 'g')
 
-  _githubUserLink: (reference, username) ->
+_githubUserLink = (reference, username) ->
-    "<a href=\"#{Travis.config.source_endpoint}/#{username}\">#{reference}</a>"
+  "<a href=\"#{config.source_endpoint}/#{username}\">#{reference}</a>"
 
-  _githubCommitReferenceRegexp: new RegExp("([\\w-]+)?\\/([\\w-]+)?@([0-9A-Fa-f]+)", 'g')
+_githubCommitReferenceRegexp = new RegExp("([\\w-]+)?\\/([\\w-]+)?@([0-9A-Fa-f]+)", 'g')
 
-  _githubCommitReferenceLink: (reference, current, matched) ->
+_githubCommitReferenceLink = (reference, current, matched) ->
   owner = matched.owner || current.owner
   repo = matched.repo || current.repo
-    url = "#{Travis.Urls.githubCommit("#{owner}/#{repo}", matched.sha)}"
+  url = "#{githubCommitUrl("#{owner}/#{repo}", matched.sha)}"
   "<a href=\"#{url}\">#{reference}</a>"
 
-  _normalizeDateString: (string) ->
+_normalizeDateString = (string) ->
   if window.JHW
     string = string.replace('T', ' ').replace(/-/g, '/')
     string = string.replace('Z', '').replace(/\..*$/, '')
   string
 
-  _nowUtc: ->
+_nowUtc = ->
-    @_toUtc Travis.currentDate()
+  @_toUtc currentDate()
 
-  _toUtc: (date) ->
+_toUtc = (date) ->
   Date.UTC date.getFullYear(), date.getMonth(), date.getDate(), date.getHours(), date.getMinutes(), date.getSeconds(), date.getMilliseconds()
 
-  _emojize: (text) ->
+_emojize = (text) ->
   emojis = text.match(/:\S+?:/g)
   if emojis isnt null
-      $.each emojis.uniq(), (ix, emoji) ->
+    emojis.uniq().each (emoji, ix) ->
       strippedEmoji = emoji.substring(1, emoji.length - 1)
       unless EmojiDictionary.indexOf(strippedEmoji) is -1
         image = '<img class=\'emoji\' title=\'' + emoji + '\' alt=\'' + emoji + '\' src=\'' + '/images/emoji/' + strippedEmoji + '.png\'/>'
         text = text.replace(new RegExp(emoji, 'g'), image)
   text
 
-  _escape: (text) ->
+_escape = (text) ->
   text.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace />/g, '&gt;'
 
-  configKeys: (config) ->
+configKeys = (config) ->
   return [] unless config
-    $.intersect($.keys(config), Object.keys(Travis.CONFIG_KEYS_MAP))
+  intersect(Object.keys(config), Object.keys(config_keys_map))
+
+Travis.Helpers =
+  configKeys: configKeys
+  _escape: _escape
+  _emojize: _emojize
+  _toUtc: _toUtc
+  _nowUtc: _nowUtc
+  _normalizeDateString: _normalizeDateString
+  _githubCommitReferenceLink: _githubCommitReferenceLink
+  _githubCommitReferenceRegexp: _githubCommitReferenceRegexp
+  _githubUserLink: _githubUserLink
+  _githubUserRegexp: _githubUserRegexp
+  _githubReferenceLink: _githubReferenceLink
+  _githubReferenceRegexp: _githubReferenceRegexp
+  githubify: githubify
+  timeInWords: timeInWords
+  durationFrom: durationFrom
+  timeAgoInWords: timeAgoInWords
+  pathFrom: pathFrom
+  formatMessage: formatMessage
+  formatConfig: formatConfig
+  formatSha: formatSha
+  formatCommit: formatCommit
+  colorForState: colorForState
+  safe: safe
+  compact: compact