set last completed block in map view

server/boot/challenge.js

@@ -471,6 +471,7 @@ module.exports = function(app) {
   }
 
   function challengeMap({ user = {} }, res, next) {
+    let lastCompleted;
     const daysRunning = moment().diff(new Date('10/15/2014'), 'days');
 
     // if user
@@ -513,7 +514,13 @@ module.exports = function(app) {
       })
       .filter(({ name }) => name !== 'Hikes')
       // turn stream of blocks into a stream of an array
-      .toArray();
+      .toArray()
+      .doOnNext((blocks) => {
+        const lastCompletedBlock = _.findLast(blocks, (block) => {
+          return block.completed === 100;
+        });
+        lastCompleted = lastCompletedBlock.name;
+      });
 
     Observable.combineLatest(
       camperCount$,
@@ -526,6 +533,7 @@ module.exports = function(app) {
             blocks,
             daysRunning,
             camperCount,
+            lastCompleted,
             title: "A map of all Free Code Camp's Challenges"
           });
         },

server/views/challengeMap/show.jade

@@ -138,7 +138,8 @@ block content
                                             a.btn.btn-lg.btn-block.signup-btn.map-challenge-block-share Section complete. Share your Portfolio with your friends.
                                                 .hidden(id="#{challengeBlock.name}")
     script.
-        var username = !{JSON.stringify(user && user.username || "")};
+        var username = !{JSON.stringify(user && user.username || '')};
+        var lastCompleted = !{JSON.stringify(lastCompleted || false)}
     // #announcementModal.modal(tabindex='-1')
     //    .modal-dialog.animated.fadeInUp.fast-animation
     //        .modal-content