Converted merge_requests.js to coffeescript and updated code

app/assets/javascripts/merge_requests.js.coffee

@@ -0,0 +1,97 @@
+#
+# * Filter merge requests
+# 
+@merge_requestsPage = ->
+  $('#assignee_id').chosen()
+  $('#milestone_id').chosen()
+  $('#milestone_id, #assignee_id').on 'change', ->
+    $(this).closest('form').submit()
+
+class MergeRequest
+  
+  constructor: (@opts) ->
+    this.$el = $('.merge-request')
+    @diffs_loaded = false
+    @commits_loaded = false
+    
+    this.activateTab(@opts.action)
+    
+    this.bindEvents()
+    
+    this.initMergeWidget()
+    this.$('.show-all-commits').on 'click', =>
+      this.showAllCommits()
+
+  # Local jQuery finder
+  $: (selector) ->
+    this.$el.find(selector)
+
+  initMergeWidget: ->
+    this.showState( @opts.current_state )
+    
+    if this.$('.automerge_widget').length and @opts.check_enable
+      $.get @opts.url_to_automerge_check, (data) =>
+        this.showState( data.state )
+      , 'json'
+
+    if @opts.ci_enable
+      $.get self.opts.url_to_ci_check, (data) =>
+        this.showCiState data.status
+      , 'json'
+
+  bindEvents: ->
+    this.$('.nav-tabs').on 'click', 'a', (event) =>
+      a = $(event.currentTarget)
+      
+      href = a.attr('href')
+      History.replaceState {path: href}, document.title, href
+      
+      event.preventDefault()
+      
+    this.$('.nav-tabs').on 'click', 'li', (event) =>
+      this.activateTab($(event.currentTarget).data('action'))
+
+  activateTab: (action) ->
+    this.$('.nav-tabs li').removeClass 'active'
+    this.$('.tab-content').hide()
+    switch action
+      when 'diffs'
+        this.$('.nav-tabs .diffs-tab').addClass 'active'
+        this.loadDiff() unless @diffs_loaded
+        this.$('.diffs').show()
+      else
+        this.$('.nav-tabs .notes-tab').addClass 'active'
+        this.$('.notes').show()
+
+  showState: (state) ->
+    $('.automerge_widget').hide()
+    $('.automerge_widget.' + state).show()
+
+  showCiState: (state) ->
+    $('.ci_widget').hide()
+    $('.ci_widget.ci-' + state).show()
+
+  loadDiff: (event) ->
+    $('.dashboard-loader').show()
+    $.ajax
+      type: 'GET'
+      url: this.$('.nav-tabs .diffs-tab a').attr('href')
+      beforeSend: =>
+        this.$('.status').addClass 'loading'
+
+      complete: =>
+        @diffs_loaded = true
+        this.$('.status').removeClass 'loading'
+
+      dataType: 'script'
+
+  showAllCommits: ->
+    this.$('.first-commits').remove()
+    this.$('.all-commits').removeClass 'hide'
+
+  alreadyOrCannotBeMerged: ->
+    this.$('.automerge_widget').hide()
+    this.$('.merge-in-progress').hide()
+    this.$('.automerge_widget.already_cannot_be_merged').show()
+
+this.MergeRequest = MergeRequest