Make boards sortable

1 files changed, 54 insertions, 0 deletions

diff --git a/client/components/boards/boardsList.js b/client/components/boards/boardsList.js
index aabc98e8..d2d44407 100644
--- a/client/components/boards/boardsList.js
+++ b/client/components/boards/boardsList.js
@@ -1,4 +1,5 @@
 const subManager = new SubsManager();
+const { calculateIndex, enableClickOnTouch } = Utils;
 
 Template.boardListHeaderBar.events({
   'click .js-open-archived-board'() {
@@ -23,6 +24,59 @@ BlazeComponent.extendComponent({
     Meteor.subscribe('setting');
   },
 
+  onRendered() {
+    const self = this;
+    function userIsAllowedToMove() {
+      return Meteor.user();
+    }
+
+    const itemsSelector = '.js-board:not(.placeholder)';
+
+    const $boards = this.$('.js-boards');
+    $boards.sortable({
+      connectWith: '.js-boards',
+      tolerance: 'pointer',
+      appendTo: '.board-list',
+      helper: 'clone',
+      distance: 7,
+      items: itemsSelector,
+      placeholder: 'board-wrapper placeholder',
+      start(evt, ui) {
+        ui.helper.css('z-index', 1000);
+        ui.placeholder.height(ui.helper.height());
+        EscapeActions.executeUpTo('popup-close');
+      },
+      stop(evt, ui) {
+        // To attribute the new index number, we need to get the DOM element
+        // of the previous and the following card -- if any.
+        const prevCardDom = ui.item.prev('.js-board').get(0);
+        const nextCardDom = ui.item.next('.js-board').get(0);
+        const sortIndex = calculateIndex(prevCardDom, nextCardDom, 1);
+
+        const boardDomElement = ui.item.get(0);
+        const board = Blaze.getData(boardDomElement);
+        // Normally the jquery-ui sortable library moves the dragged DOM element
+        // to its new position, which disrupts Blaze reactive updates mechanism
+        // (especially when we move the last card of a list, or when multiple
+        // users move some cards at the same time). To prevent these UX glitches
+        // we ask sortable to gracefully cancel the move, and to put back the
+        // DOM in its initial state. The card move is then handled reactively by
+        // Blaze with the below query.
+        $boards.sortable('cancel');
+
+        board.move(sortIndex.base);
+      },
+    });
+
+    // ugly touch event hotfix
+    enableClickOnTouch(itemsSelector);
+
+    // Disable drag-dropping if the current user is not a board member or is comment only
+    this.autorun(() => {
+      $boards.sortable('option', 'disabled', !userIsAllowedToMove());
+    });
+  },
+
   boards() {
     let query = {
       archived: false,