Bulk assignment implementation

app/assets/javascripts/dispatcher.js.coffee

@@ -17,6 +17,7 @@ class Dispatcher
     switch page
       when 'projects:issues:index'
         Issuable.init()
+        new IssuableBulkActions()
         shortcut_handler = new ShortcutsNavigation()
       when 'projects:issues:show'
         new Issue()

app/assets/javascripts/issues-bulk-assignment.js.coffee

+class @IssuableBulkActions
+  constructor: (opts = {}) ->
+    # Set defaults
+    {
+      @container = $('.content')
+      @form = @getElement('.bulk-update')
+      @issues = @getElement('.issues-list .issue')
+    } = opts
+
+    @bindEvents()
+
+  getElement: (selector) ->
+    @container.find selector
+
+  bindEvents: ->
+    @form.on 'submit', @onFormSubmit.bind(@)
+
+  onFormSubmit: (e) ->
+    e.preventDefault()
+    @submit()
+
+  submit: ->
+    _this = @
+
+    xhr = $.ajax
+            url: @form.attr 'action'
+            method: @form.attr 'method'
+            dataType: 'JSON',
+            data: @getFormDataAsObject()
+
+    xhr.done (response, status, xhr) ->
+      Turbolinks.visit(location.href)
+
+    xhr.fail ->
+      console.error 'fail'
+
+    xhr.always ->
+      _this.onFormSubmitAlways()
+
+  onFormSubmitAlways: ->
+    @form.find('[type="submit"]').enable()
+
+  getSelectedIssues: ->
+    @issues.has('.selected_issue:checked')
+
+  getLabelsFromSelection: ->
+    labels = []
+
+    @getSelectedIssues().map ->
+      _labels = $(@).data('labels')
+      console.log _labels
+      if _labels
+        _labels.map (labelId)->
+          labels.push(labelId) if labels.indexOf(labelId) is -1
+
+    labels
+
+  ###*
+   * Will return only labels that were marked previously and the user has unmarked
+   * @return {Array} Label IDs
+  ###
+  getUnmarkedIndeterminedLabels: ->
+    result = []
+    labelsToKeep = []
+
+    for el in @getElement('.labels-filter .is-indeterminate')
+      labelsToKeep.push $(el).data('labelId')
+
+    for id in @getLabelsFromSelection()
+      # Only the ones that we are not going to keep
+      result.push(id) if labelsToKeep.indexOf(id) is -1
+
+    result
+
+  ###*
+   * Simple form serialization, it will return just what we need
+   * Returns key/value pairs from form data
+  ###
+  getFormDataAsObject: ->
+    formData =
+      update:
+        issues_ids: @form.find('#update_issues_ids').val()
+        add_label_ids: []
+        remove_label_ids: []
+
+    for id in @getLabelsToApply()
+      formData.update.add_label_ids.push id
+
+    for id in @getLabelsToRemove()
+      formData.update.remove_label_ids.push id
+
+    formData
+
+  getLabelsToApply: ->
+    labelIds = []
+    $labels = @form.find('.labels-filter input[name="update[label_ids][]"]')
+
+    for label in $labels
+      labelIds.push $(label).val() if label
+
+    labelIds
+
+  ###*
+   * Just an alias of @getUnmarkedIndeterminedLabels
+   * @return {Array} Array of labels
+  ###
+  getLabelsToRemove: ->
+    @getUnmarkedIndeterminedLabels()

app/views/shared/issuable/_filter.html.haml

@@ -31,7 +31,7 @@
 
     - if controller.controller_name == 'issues'
       .issues_bulk_update.hide
-        = form_tag bulk_update_namespace_project_issues_path(@project.namespace, @project), method: :post  do
+        = form_tag bulk_update_namespace_project_issues_path(@project.namespace, @project), method: :post, class: 'bulk-update'  do
           .filter-item.inline
             = dropdown_tag("Status", options: { toggle_class: "js-issue-status", title: "Change status", dropdown_class: "dropdown-menu-status dropdown-menu-selectable", data: { field_name: "update[state_event]" } } ) do
               %ul
@@ -46,7 +46,7 @@
             = dropdown_tag("Milestone", options: { title: "Assign milestone", toggle_class: 'js-milestone-select js-extra-options js-filter-submit js-filter-bulk-update', filter: true, dropdown_class: "dropdown-menu-selectable dropdown-menu-milestone", placeholder: "Search milestones", data: { show_no: true, field_name: "update[milestone_id]", project_id: @project.id, milestones: namespace_project_milestones_path(@project.namespace, @project, :json), use_id: true } })
 
           .filter-item.inline.labels-filter
-            = render "shared/issuable/label_dropdown", classes: ' js-filter-bulk-update js-multiselect ', extra_options: false, filter_submit: false, show_footer: false, extra_options: false, data_options: {  field_name: "update[label_ids][]", show_no: false, show_any: false, use_id: true }
+            = render "shared/issuable/label_dropdown", classes: ' js-filter-bulk-update js-multiselect ', show_create: false, show_footer: false, extra_options: false, filter_submit: false, show_footer: false, data_options: { persist_when_hide: "true", field_name: "update[label_ids][]", show_no: false, show_any: false, use_id: true }
 
           = hidden_field_tag 'update[issues_ids]', []
           = hidden_field_tag :state_event, params[:state_event]