Implemented code review request disabling per exercise

Author: Joni Salmi

tmc-plugin/src/fi/helsinki/cs/tmc/actions/RequestReviewAction.java

@@ -70,11 +70,18 @@ protected CourseDb getCourseDb() {
 
     @Override
     public boolean enable(Project... projects) {
-        if (projects.length > 1) {
+        if (projects.length != 1) {
             return false; // One at a time please
-        } else {
-            return super.enable(projects);
         }
+
+        TmcProjectInfo projectInfo = projectMediator.wrapProject(projects[0]);
+        Exercise exercise = projectMediator.tryGetExerciseForProject(projectInfo, courseDb);
+
+        if (exercise != null && !exercise.isCodeReviewRequestsEnabled()) {
+            return false;
+        }
+
+        return super.enable(projects);
     }
 
     @Override

tmc-plugin/src/fi/helsinki/cs/tmc/data/Exercise.java

@@ -57,6 +57,9 @@ public class Exercise implements Serializable {
     @SerializedName("valgrind_strategy")
     private ValgrindStrategy valgrindStrategy = ValgrindStrategy.FAIL;
 
+    @SerializedName("code_review_requests_enabled")
+    private boolean codeReviewRequestsEnabled;
+
     public enum ValgrindStrategy {
         @SerializedName("")
         NONE,
@@ -262,6 +265,14 @@ public ValgrindStrategy getValgrindStrategy() {
         return valgrindStrategy;
     }
 
+    public boolean isCodeReviewRequestsEnabled() {
+        return codeReviewRequestsEnabled;
+    }
+
+    public void setCodeReviewRequestsEnabled(boolean codeReviewRequestsEnabled) {
+        this.codeReviewRequestsEnabled = codeReviewRequestsEnabled;
+    }
+
     @Override
     public String toString() {
         return name;