Adding format easier to parse for OSX app.

Change-Id: Ibbf7f9ff7453b4e879da9c8c9215d8bb429a524b

@@ -26,7 +26,9 @@ import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
 import java.io.PrintWriter;
 import java.text.SimpleDateFormat;
+import java.util.ArrayList;
 import java.util.Date;
+import java.util.List;
 
 import static com.google.common.base.Strings.isNullOrEmpty;
 
@@ -37,14 +39,59 @@ public class WardenServlet extends HttpServlet {
 
     static Warden warden;
 
+    private SimpleDateFormat fmt = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
+
     @Override
     protected void doGet(HttpServletRequest req, HttpServletResponse resp)
             throws ServletException, IOException {
         resp.setContentType("text/plain; charset=UTF-8");
-        SimpleDateFormat fmt = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
-
         try (PrintWriter out = resp.getWriter()) {
-            for (String cellName : warden.getCells()) {
+            if (req.getPathInfo().endsWith("data")) {
+                String userName = req.getParameter("user");
+                if (userName != null) {
+                    printUserInfo(out, userName);
+                } else {
+                    printAvailability(out);
+                }
+            } else {
+                printAvailabilityText(out);
+            }
+        } catch (Exception e) {
+            resp.setStatus(Response.SC_INTERNAL_SERVER_ERROR);
+            e.printStackTrace();
+        }
+    }
+
+    private void printUserInfo(PrintWriter out, String userName) {
+        Reservation reservation = warden.currentUserReservation(userName);
+        out.println(getCellStatus(null, reservation));
+    }
+
+    private void printAvailability(PrintWriter out) {
+        List<String> list = new ArrayList<>(warden.getCells());
+        list.sort(String::compareTo);
+        for (String cellName : list) {
+            Reservation reservation = warden.currentCellReservation(cellName);
+            out.println(getCellStatus(cellName, reservation));
+        }
+    }
+
+    private String getCellStatus(String cellName, Reservation reservation) {
+        if (reservation != null) {
+            long expiration = reservation.time + reservation.duration * 60_000;
+            long remaining = (expiration - System.currentTimeMillis()) / 60_000;
+            return String.format("%s,%s,%s,%s", reservation.cellName,
+                    reservation.cellSpec, reservation.userName, remaining);
+        } else if (cellName != null) {
+            return String.format("%s", cellName);
+        }
+        return null;
+    }
+
+    private void printAvailabilityText(PrintWriter out) {
+        List<String> list = new ArrayList<>(warden.getCells());
+        list.sort(String::compareTo);
+        for (String cellName : list) {
             Reservation reservation = warden.currentCellReservation(cellName);
             if (reservation != null) {
                 long expiration = reservation.time + reservation.duration * 60_000;
@@ -59,10 +106,6 @@ public class WardenServlet extends HttpServlet {
                 out.println(String.format("%-10s\t%-10s", cellName, "available"));
             }
         }
-        } catch (Exception e) {
-            resp.setStatus(Response.SC_INTERNAL_SERVER_ERROR);
-            e.printStackTrace();
-        }
     }
 
     @Override