Close #1; Add app logic to query db for topic name based on regex and…

… display faqs with matching topic names; Add re-routing of GET on /Faqs to landing page

GroupKOPS_COMP303_Assignment3_JPA/src/com/faq/app/dao/DatabaseOperations.java

@@ -18,7 +18,30 @@ public class DatabaseOperations {
 
 	public static List<Faq> getAllFaqRecords() {
 		TypedQuery<Faq> query = em.createNamedQuery("Faq.findAll", Faq.class);
+		return getFaqQueryResults(query);
 		// Query query = em.createQuery("SELECT f FROM Faq f");
+		// List<Faq> faqList = query.getResultList();
+		// if (faqList != null && faqList.size() > 0) {
+		// return faqList;
+		// } else {
+		// return null;
+		// }
+	}
+
+	public static List<Faq> getAllFaqRecordsWithTopicNameContaining(String topicName) {
+		TypedQuery<Faq> query = em.createNamedQuery("Faq.findByContainingTopicName", Faq.class);
+		query.setParameter("topicName", topicName);
+		return getFaqQueryResults(query);
+		// List<Faq> faqList = query.getResultList();
+		// if (faqList != null && faqList.size() > 0) {
+		// return faqList;
+		// } else {
+		// return null;
+		// }
+	}
+
+	// Helper functions
+	private static List<Faq> getFaqQueryResults(TypedQuery<Faq> query) {
 		List<Faq> faqList = query.getResultList();
 		if (faqList != null && faqList.size() > 0) {
 			return faqList;

GroupKOPS_COMP303_Assignment3_JPA/src/com/faq/app/model/Faq.java

@@ -6,14 +6,16 @@
 import javax.persistence.Entity;
 import javax.persistence.JoinColumn;
 import javax.persistence.ManyToOne;
+import javax.persistence.NamedQueries;
 import javax.persistence.NamedQuery;
 
 /**
  * The persistent class for the faq database table.
  * 
  */
 @Entity
-@NamedQuery(name = "Faq.findAll", query = "SELECT f FROM Faq f")
+@NamedQueries({ @NamedQuery(name = "Faq.findAll", query = "SELECT f FROM Faq f"),
+		@NamedQuery(name = "Faq.findByContainingTopicName", query = "SELECT f FROM Faq f WHERE LOWER(f.topic.topicName) LIKE LOWER(CONCAT('%', :topicName, '%'))") })
 public class Faq implements Serializable {
 	private static final long serialVersionUID = 1L;
 

GroupKOPS_COMP303_Assignment3_Web/WebContent/index.jsp

@@ -56,8 +56,10 @@
 		</c:when>
 		<c:otherwise>
 			<!-- show instructions -->
-			<span>Please enter in the name of a topic title above and
-				press search to find questions related to the topic.</span>
+			<p>Please enter in the name of a topic title above and press
+				search to find questions related to the topic.</p>
+			<p>If the topic name field is left blank, all questions will be
+				displayed.</p>
 		</c:otherwise>
 	</c:choose>
 </div>

GroupKOPS_COMP303_Assignment3_Web/src/com/faq/app/servlet/Faqs.java

@@ -26,8 +26,8 @@ public class Faqs extends HttpServlet {
 	 */
 	protected void doGet(HttpServletRequest request, HttpServletResponse response)
 			throws ServletException, IOException {
-		// TODO Auto-generated method stub
-		response.getWriter().append("Served at: ").append(request.getContextPath());
+		// should not be able to do get request to /Faqs, redirects to landing page
+		response.sendRedirect("");
 	}
 
 	/**
@@ -37,18 +37,20 @@ protected void doGet(HttpServletRequest request, HttpServletResponse response)
 	protected void doPost(HttpServletRequest request, HttpServletResponse response)
 			throws ServletException, IOException {
 
-		List<Faq> faqQueryResults = DatabaseOperations.getAllFaqRecords();
-		System.out.println("Found faqs: " + faqQueryResults);
+		// List<Faq> faqQueryResults = DatabaseOperations.getAllFaqRecords();
+		// System.out.println("Found faqs: " + faqQueryResults);
 
 		// when a user has made a post request to /Faqs, then they have queried the
 		// db...otherwise they simply visited page, no queries executed yet (show diff
 		// view on page)
 		HttpSession session = request.getSession();
+		String queriedTopicName = request.getParameter("topicName");
+		List<Faq> faqQueryResults = DatabaseOperations.getAllFaqRecordsWithTopicNameContaining(queriedTopicName);
 
 		// if (request.getAttribute("userQueriedDb") == null) {
 		request.setAttribute("userQueriedDb", true);
 		// }
-		request.setAttribute("queriedTopicName", request.getParameter("topicName"));
+		request.setAttribute("queriedTopicName", queriedTopicName);
 		request.setAttribute("matchingFaqs", faqQueryResults);
 		request.getRequestDispatcher("index.jsp").forward(request, response);
 	}