Merge request drag-n-drop on milestone page

Allows moving milestone between 3 columns: unassigned, assigned,
declined

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

1 files changed, 39 insertions, 2 deletions

diff --git a/app/assets/javascripts/milestone.js.coffee b/app/assets/javascripts/milestone.js.coffee
index d2857948cd7..4a2c5068bab 100644
--- a/app/assets/javascripts/milestone.js.coffee
+++ b/app/assets/javascripts/milestone.js.coffee
@@ -11,10 +11,23 @@ class Milestone
           new Flash("Issue update failed", 'alert')
       dataType: "json"
 
+  @updateMergeRequest: (li, merge_request_url, data) ->
+    $.ajax
+      type: "PUT"
+      url: merge_request_url
+      data: data
+      success: (data) ->
+        if data.saved == true
+          $(li).effect 'highlight'
+        else
+          new Flash("Issue update failed", 'alert')
+      dataType: "json"
+
   constructor: ->
-    @bindSorting()
+    @bindIssuesSorting()
+    @bindMergeRequestSorting()
 
-  bindSorting: ->
+  bindIssuesSorting: ->
     $("#issues-list-unassigned, #issues-list-ongoing, #issues-list-closed").sortable(
       connectWith: ".issues-sortable-list",
       dropOnEmpty: true,
@@ -38,4 +51,28 @@ class Milestone
 
     ).disableSelection()
 
+  bindMergeRequestSorting: ->
+    $("#merge_requests-list-unassigned, #merge_requests-list-ongoing, #merge_requests-list-closed").sortable(
+      connectWith: ".merge_requests-sortable-list",
+      dropOnEmpty: true,
+      receive: (event, ui) ->
+        new_state = $(this).data('state')
+        merge_request_id = ui.item.data('iid')
+        merge_request_url = ui.item.data('url')
+
+        data = switch new_state
+          when 'ongoing'
+            "merge_request[assignee_id]=" + gon.current_user_id
+          when 'unassigned'
+            "merge_request[assignee_id]="
+          when 'closed'
+            "merge_request[state_event]=close"
+
+        if $(ui.sender).data('state') == "closed"
+          data += "&merge_request[state_event]=reopen"
+
+        Milestone.updateMergeRequest(ui.item, merge_request_url, data)
+
+    ).disableSelection()
+
 @Milestone = Milestone