import export tree done

src/js/level/sandbox.js

@@ -13,8 +13,9 @@ var Command = require('../models/commandModel').Command;
 var GitShim = require('../git/gitShim').GitShim;
 
 var Views = require('../views');
-var ModalTerminal = require('../views').ModalTerminal;
-var ModalAlert = require('../views').ModalAlert;
+var ModalTerminal = Views.ModalTerminal;
+var ModalAlert = Views.ModalAlert;
+var BuilderViews = require('../views/builderViews');
 var MultiView = require('../views/multiView').MultiView;
 
 var Sandbox = Backbone.View.extend({
@@ -191,6 +192,8 @@ var Sandbox = Backbone.View.extend({
   },
 
   processSandboxCommand: function(command, deferred) {
+    // I'm tempted to do camcel case conversion, but there are
+    // some exceptions to the rule
     var commandMap = {
       'reset solved': this.resetSolved,
       'help general': this.helpDialog,
@@ -203,7 +206,9 @@ var Sandbox = Backbone.View.extend({
       'sandbox': this.exitLevel,
       'levels': this.showLevels,
       'iosAlert': this.iosAlert,
-      'build level': this.buildLevel
+      'build level': this.buildLevel,
+      'export tree': this.exportTree,
+      'import tree': this.importTree
     };
 
     var method = commandMap[command.get('method')];
@@ -224,6 +229,59 @@ var Sandbox = Backbone.View.extend({
     this.mainVis.show();
   },
 
+  importTree: function(command, deferred) {
+    var jsonGrabber = new BuilderViews.MarkdownPresenter({
+      previewText: "Paste a tree JSON blob below!",
+      fillerText: ' '
+    });
+    jsonGrabber.deferred.promise
+    .then(_.bind(function(treeJSON) {
+      try {
+        this.mainVis.gitEngine.loadTree(JSON.parse(treeJSON));
+      } catch(e) {
+        this.mainVis.reset();
+        new MultiView({
+          childViews: [{
+            type: 'ModalAlert',
+            options: {
+              markdowns: [
+                '## Error!',
+                '',
+                'Something is wrong with that JSON! Here is the error:',
+                '',
+                String(e)
+              ]
+            }
+          }]
+        });
+      }
+    }, this))
+    .fail(function() { })
+    .done(function() {
+      command.finishWith(deferred);
+    });
+  },
+
+  exportTree: function(command, deferred) {
+    var treeJSON = JSON.stringify(this.mainVis.gitEngine.exportTree(), null, 2);
+
+    var showJSON = new MultiView({
+      childViews: [{
+        type: 'MarkdownPresenter',
+        options: {
+          previewText: 'Share this tree with friends! They can load it with "import tree"',
+          fillerText: treeJSON,
+          noConfirmCancel: true
+        }
+      }]
+    });
+    showJSON.getPromise()
+    .then(function() {
+      command.finishWith(deferred);
+    })
+    .done();
+  },
+
   clear: function(command, deferred) {
     Main.getEvents().trigger('clearOldCommands');
     if (command && deferred) {