Sum of cards. In Progress.

Thanks to xet7 !

Related #3796

client/components/lists/listBody.jade

@@ -4,6 +4,17 @@ template(name="listBody")
       if cards.count
         +inlinedForm(autoclose=false position="top")
           +addCardForm(listId=_id position="top")
+      ul.sidebar-list
+        each customFieldsSum
+          li
+            +viewer
+              = name
+            if $eq customFieldsSum.type "number"
+              +viewer
+                = value
+            if $eq customFieldsSum.type "currency"
+              +viewer
+                = formattedCurrencyCustomFieldValue(value)
       each (cardsWithLimit (idOrNull ../../_id))
         a.minicard-wrapper.js-minicard(href=originRelativeUrl
           class="{{#if cardIsSelected}}is-selected{{/if}}"

client/components/lists/listBody.js

@@ -13,6 +13,13 @@ BlazeComponent.extendComponent({
     return [];
   },
 
+  customFieldsSum() {
+    return CustomFields.find({
+      boardIds: { $in: [Session.get('currentBoard')] },
+      showSumAtTopOfList: true,
+    });
+  },
+
   openForm(options) {
     options = options || {};
     options.position = options.position || 'top';

client/components/sidebar/sidebarCustomFields.jade

@@ -77,6 +77,12 @@ template(name="createCustomFieldPopup")
 
             span {{_ 'showLabel-field-on-card'}}
 
+
+        a.flex.js-field-show-sum-at-top-of-list(class="{{#if showSumAtTopOfList}}is-checked{{/if}}")
+            .materialCheckBox(class="{{#if showSumAtTopOfList}}is-checked{{/if}}")
+
+            span {{_ 'showSum-field-on-list'}}
+
         button.primary.wide.left(type="button")
             | {{_ 'save'}}
         if _id

client/components/sidebar/sidebarCustomFields.js

@@ -234,6 +234,14 @@ const CreateCustomFieldPopup = BlazeComponent.extendComponent({
           $target.find('.materialCheckBox').toggleClass('is-checked');
           $target.toggleClass('is-checked');
         },
+        'click .js-field-show-sum-at-top-of-list'(evt) {
+          let $target = $(evt.target);
+          if (!$target.hasClass('js-field-show-sum-at-top-of-list')) {
+            $target = $target.parent();
+          }
+          $target.find('.materialCheckBox').toggleClass('is-checked');
+          $target.toggleClass('is-checked');
+        },
         'click .primary'(evt) {
           evt.preventDefault();
 
@@ -248,6 +256,8 @@ const CreateCustomFieldPopup = BlazeComponent.extendComponent({
               this.find('.js-field-automatically-on-card.is-checked') !== null,
             alwaysOnCard:
               this.find('.js-field-always-on-card.is-checked') !== null,
+            showSumAtTopOfList:
+              this.find('.js-field-show-sum-at-top-of-list.is-checked') !== null,
           };
 
           // insert or update