check in hint service which provides a list of hints for the current lesson

java/org/owasp/webgoat/service/HintService.java

@@ -5,7 +5,13 @@
  */
 package org.owasp.webgoat.service;
 
+import java.util.ArrayList;
+import java.util.List;
+import javax.servlet.http.HttpSession;
+import org.owasp.webgoat.lessons.AbstractLesson;
 import org.owasp.webgoat.lessons.model.Hint;
+import org.owasp.webgoat.session.Course;
+import org.owasp.webgoat.session.WebSession;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.ResponseBody;
@@ -16,14 +22,41 @@ import org.springframework.web.bind.annotation.ResponseBody;
  */
 @Controller
 public class HintService extends BaseService {
-    
+
+    /**
+     * Returns hints for current lesson
+     *
+     * @param session
+     * @return
+     */
     @RequestMapping(value = "/hint.do", produces = "application/json")
     public @ResponseBody
-    Hint showHint() {
-        Hint h = new Hint();
-        h.setHint("This is a test hint");
-        h.setLesson("Some lesson");
-        h.setNumber(1);
-        return h;
+    List<Hint> showHint(HttpSession session) {
+        List<Hint> listHints = new ArrayList<Hint>();
+        WebSession ws;
+        Object o = session.getAttribute(WebSession.SESSION);
+        if (o == null || !(o instanceof WebSession)) {
+            return null;
+        }
+        ws = (WebSession) o;
+        AbstractLesson l = ws.getCurrentLesson();
+        if (l == null) {
+            return listHints;
+        }
+        List<String> hints;
+        hints = l.getHintsPublic(ws);
+        if (hints == null) {
+            return listHints;
+        }
+        int idx = 0;
+        for (String h : hints) {
+            Hint hint = new Hint();
+            hint.setHint(h);
+            hint.setLesson(l.getName());
+            hint.setNumber(idx);
+            listHints.add(hint);
+            idx++;
+        }
+        return listHints;
     }
 }