Add localStorage

app/actors/PLMActor.scala

@@ -177,6 +177,10 @@ class PLMActor (
               "exercises" -> ExerciseToJson.exercisesWrite(lectures) 
             ))
           }
+        case "getLastCommit" =>
+          getCommitId(msg, "commitId")
+        case "loadContent" => 
+          getCommitId(msg, "loadContent")
         case "getLangs" =>
           sendMessage("langs", Json.obj(
             "selected" -> LangToJson.langWrite(currentPreferredLang),
@@ -305,6 +309,17 @@ class PLMActor (
       )
     }
   } 
+
+  def getCommitId(msg: JsValue, response: String) {
+    var optExerciseID : Option[String]  = (msg \ "args" \ "exerciseID").asOpt[String]
+          var optLanguage : Option[String]  = (msg \ "args" \ "language").asOpt[String]
+          var filename: String = null
+          (optExerciseID.getOrElse(None), optLanguage.getOrElse(None)) match {
+            case (exerciseID: String, language: String) =>
+              filename = exerciseID + "." + language + ".code"
+              sendMessage(response, Json.obj("id" -> plm.getLastCommitId(exerciseID, language)))
+          }
+  }
 
   def initExecutionManager() {
     executionManager.setPLMActor(this)

app/models/PLM.scala

@@ -43,6 +43,7 @@ class PLM(
   var game = new Game(initUserUUID, plmLogger, locale, lastProgLang.getOrElse("Java"), gitUtils, trackUser, properties)
   var gitGest = new Git(initUserUUID, gitUtils)
 
+
   def lessons: Map[String, Lesson] = game.getMapLessons
 
   def switchLesson(lessonID: String): Lecture = {
@@ -75,6 +76,10 @@ class PLM(
     return _currentExercise
   }
 
+  def getLastCommitId(exerciseID: String, language: String) : String = {
+    return gitUtils.getLastCommitId(exerciseID, language)
+  }
+
   def getSelectedWorldID(): String = {
     return game.getSelectedWorld.getName
   }

public/app/exercise/exercise.controller.js

@@ -96,6 +96,7 @@
     exercise.ide = 'codemirror';
     exercise.toolbox = null;
     exercise.studentCode = null;
+    exercise.commitId = null;
 
     exercise.drawServiceType = '';
     exercise.drawService = null;
@@ -148,6 +149,7 @@
         exercise.idle = false;
         connection.sendMessage('userBack', {});
       }
+      saveEditorContent();
       startIdleLoop();
     }
 
@@ -157,6 +159,21 @@
       exercise.editor.on('change', resetIdleLoop);
       resizeCodeMirror();
     };
+
+
+    function saveEditorContent()  {
+      // Save the editor content in the local storage
+      $window.localStorage.setItem("editor." + exercise.id + "." + exercise.currentProgrammingLanguage, editor.getValue());
+      $window.localStorage.setItem("commitId." + exercise.id + "." + exercise.currentProgrammingLanguage, exercise.commitId);
+    }
+
+    function loadEditorContent() {
+      var args = {
+        exerciseID: exercise.id,
+        language: exercise.currentProgrammingLanguage
+      }
+      connection.sendMessage('loadContent', args);
+    }
 
     function getExercise() {
       var args = {
@@ -205,13 +222,31 @@
       case 'newHumanLang':
         updateUI(exercise.currentProgrammingLanguage, args.instructions, args.api, null);
         break;
+      case 'commitId':
+        exercise.commitId = args.id;
+        break;
+      case 'loadContent': 
+        exercise.commitId = args.id;
+        var localCommitId = $window.localStorage.getItem("commitId." + exercise.id + "." + exercise.currentProgrammingLanguage);
+        if (localCommitId === exercise.commitId || localCommitId === "") {
+          var editorValue = $window.localStorage.getItem("editor." + exercise.id + "." + exercise.currentProgrammingLanguage);
+          if (editorValue !== null) {
+            editor.setValue(editorValue);
+            // FIXME
+            console.log("content loaded from local storage");
+          }
+        } else
+        // FIXME
+          console.log("content NOT loaded");
+        break;
       }
+
     }
 
     function setExercise(data) {
       exercise.id = data.id;
       exercise.name = data.id.split('.').pop();
-
+      
       navigation.setInlesson(true);
       navigation.setCurrentPageTitle(exercise.lessonName + ' / ' + exercise.name);
 
@@ -459,6 +494,7 @@
           }
         }
         progLangs.setCurrentProglang(progLang);
+        exercise.currentProgrammingLanguage = progLang.lang.toLowerCase();
         updateUI(progLang, data.instructions, data.api, data.code.trim());
       }
 
@@ -468,8 +504,8 @@
       exercise.resultType = null;
       exercise.result = '';
       exercise.logs = '';
-
       exercisesList.setCurrentLessonID(exercise.lessonID);
+
     }
 
     function updateInstructions(instructions, api) {
@@ -614,7 +650,8 @@
       exercise.updateModelLoop = $timeout(updateModel, $scope.timer);
     }
 
-    function updateModel() {
+    function updateModel() {     
+      connection.sendMessage("getLastCommit", {exerciseID: exercise.id, language: exercise.currentProgrammingLanguage})
       var currentState = exercise.currentWorld.currentState;
       var nbStates = exercise.currentWorld.operations.length - 1;
       if (currentState !== nbStates) {
@@ -833,6 +870,7 @@
           $timeout(function () {
             exercise.editor.refresh();
           }, 0);
+          loadEditorContent();
         }
       }
       updateInstructions(instructions, api);
@@ -848,4 +886,4 @@
     }
     return buffer;
   }
-})();
+})();