Server rendering (building index html in the server side)

.classpath

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" output="target/classes" path="src/main/java">
+		<attributes>
+			<attribute name="optional" value="true"/>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" output="target/test-classes" path="src/test/java">
+		<attributes>
+			<attribute name="optional" value="true"/>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8">
+		<attributes>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
+		<attributes>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="output" path="target/classes"/>
+</classpath>

.project

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>codeu-starter-project</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.m2e.core.maven2Builder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+		<nature>org.eclipse.m2e.core.maven2Nature</nature>
+	</natures>
+</projectDescription>

src/main/java/com/google/codeu/data/Datastore.java

@@ -136,4 +136,35 @@ public User getUser(String email) {
 
     return user;
   }
+
+  public List<UserMarker> getMarkers() {
+    List<UserMarker> markers = new ArrayList<>();
+
+    Query query = new Query("UserMarker");
+    PreparedQuery results = datastore.prepare(query);
+
+    for (Entity entity : results.asIterable()) {
+      try {
+        double lat = (double) entity.getProperty("lat");
+        double lng = (double) entity.getProperty("lng");
+        String content = (String) entity.getProperty("content");
+
+        UserMarker marker = new UserMarker(lat, lng, content);
+        markers.add(marker);
+      } catch (Exception e) {
+        System.err.println("Error reading marker.");
+        System.err.println(entity.toString());
+        e.printStackTrace();
+      }
+    }
+    return markers;
+  }
+
+  public void storeMarker(UserMarker marker) {
+    Entity markerEntity = new Entity("UserMarker");
+    markerEntity.setProperty("lat", marker.getLat());
+    markerEntity.setProperty("lng", marker.getLng());
+    markerEntity.setProperty("content", marker.getContent());
+    datastore.put(markerEntity);
+  }
 }

src/main/java/com/google/codeu/data/UserMarker.java

@@ -0,0 +1,26 @@
+package com.google.codeu.data;
+
+public class UserMarker {
+
+  private double lat;
+  private double lng;
+  private String content;
+
+  public UserMarker(double lat, double lng, String content) {
+    this.lat = lat;
+    this.lng = lng;
+    this.content = content;
+  }
+
+  public double getLat() {
+    return lat;
+  }
+
+  public double getLng() {
+    return lng;
+  }
+
+  public String getContent() {
+    return content;
+  }
+}

src/main/java/com/google/codeu/servlets/HomeServlet.java

@@ -0,0 +1,42 @@
+package com.google.codeu.servlets;
+
+import com.google.appengine.api.users.UserService;
+import com.google.appengine.api.users.UserServiceFactory;
+import java.io.IOException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+@WebServlet("/home.html")
+public class HomeServlet extends HttpServlet {
+
+  @Override
+  public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
+
+    UserService userService = UserServiceFactory.getUserService();
+
+    response.setContentType("text/html;");
+    response.getOutputStream().println("<!DOCTYPE html>");
+    response.getOutputStream().println("<html>");
+    response.getOutputStream().println("<head>");
+    response.getOutputStream().println("<title>Servlet HTML Example</title>");
+    response.getOutputStream().println("</head>");
+    response.getOutputStream().println("<body>");
+
+    if (userService.isUserLoggedIn()) {
+      String username = userService.getCurrentUser().getEmail();
+      response
+          .getOutputStream()
+          .println("<a href=\"/user-page.html?user=" + username + "\">Your Page</a>");
+      response.getOutputStream().println("<a href=\"/logout\">Logout</a>");
+    } else {
+      response.getOutputStream().println("<a href=\"/login\">Login</a>");
+    }
+
+    response.getOutputStream().println("<h1>Servlet HTML Example</h1>");
+    response.getOutputStream().println("<p>This HTML came from a servlet!</p>");
+    response.getOutputStream().println("</body>");
+    response.getOutputStream().println("</html>");
+  }
+}

src/main/java/com/google/codeu/servlets/UfoDataServlet.java

@@ -0,0 +1,53 @@
+package com.google.codeu.servlets;
+
+import com.google.gson.Gson;
+import com.google.gson.JsonArray;
+import java.io.IOException;
+import java.util.Scanner;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+/** Returns UFO data as a JSON array, e.g. [{"lat": 38.4404675, "lng": -122.7144313}] */
+@WebServlet("/ufo-data")
+public class UfoDataServlet extends HttpServlet {
+
+  JsonArray ufoSightingArray;
+
+  @Override
+  public void init() {
+    ufoSightingArray = new JsonArray();
+    Gson gson = new Gson();
+    Scanner scanner = new Scanner(getServletContext().getResourceAsStream("/WEB-INF/ufo-data.csv"));
+    while (scanner.hasNextLine()) {
+      String line = scanner.nextLine();
+      String[] cells = line.split(",");
+
+      String state = cells[0];
+      double lat = Double.parseDouble(cells[1]);
+      double lng = Double.parseDouble(cells[2]);
+
+      ufoSightingArray.add(gson.toJsonTree(new UfoSighting(state, lat, lng)));
+    }
+    scanner.close();
+  }
+
+  @Override
+  public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
+    response.setContentType("application/json");
+    response.getOutputStream().println(ufoSightingArray.toString());
+  }
+
+  private static class UfoSighting {
+    String state;
+    double lat;
+    double lng;
+
+    private UfoSighting(String state, double lat, double lng) {
+      this.state = state;
+      this.lat = lat;
+      this.lng = lng;
+    }
+  }
+}

src/main/java/com/google/codeu/servlets/UserMarkerServlet.java

@@ -0,0 +1,47 @@
+package com.google.codeu.servlets;
+
+import com.google.codeu.data.Datastore;
+import com.google.codeu.data.UserMarker;
+import com.google.gson.Gson;
+import java.io.IOException;
+import java.util.List;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import org.jsoup.Jsoup;
+import org.jsoup.safety.Whitelist;
+
+/** Handles fetching and saving {@link UserMarker} instances. */
+@WebServlet("/user-markers")
+public class UserMarkerServlet extends HttpServlet {
+
+  private Datastore datastore;
+
+  @Override
+  public void init() {
+    datastore = new Datastore();
+  }
+
+  @Override
+  public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
+    response.setContentType("application/json");
+
+    List<UserMarker> markers = datastore.getMarkers();
+    Gson gson = new Gson();
+    String json = gson.toJson(markers);
+
+    response.getOutputStream().println(json);
+  }
+
+  @Override
+  public void doPost(HttpServletRequest request, HttpServletResponse response) {
+
+    double lat = Double.parseDouble(request.getParameter("lat"));
+    double lng = Double.parseDouble(request.getParameter("lng"));
+    String content = Jsoup.clean(request.getParameter("content"), Whitelist.none());
+
+    UserMarker marker = new UserMarker(lat, lng, content);
+    datastore.storeMarker(marker);
+  }
+}

src/main/java/com/google/codeu/servlets/index.jsp

@@ -0,0 +1,36 @@
+<%@ page import="com.google.appengine.api.users.UserService" %>
+<%@ page import="com.google.appengine.api.users.UserServiceFactory" %>
+
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="UTF-8">
+    <title>CodeU Starter Project</title>
+    <link rel="stylesheet" href="/css/main.css">
+  </head>
+  <body>
+    <nav>
+      <ul id="navigation">
+        <li><a href="/">Home</a></li>
+
+    <%
+      UserService userService = UserServiceFactory.getUserService();
+      if (userService.isUserLoggedIn()) {
+        String username = userService.getCurrentUser().getEmail();
+    %>
+        <li><a href="/user-page.html?user=<%= username %>">Your Page</a></li>
+        <li><a href="/logout">Logout</a></li>
+    <% } else {   %>
+       <li><a href="/login">Login</a></li>
+    <% } %>
+
+      </ul>
+    </nav>
+    <h1>CodeU Starter Project</h1>
+    <p>This is the CodeU starter project. Click the links above to login and visit your page.
+       You can post messages on your page, and you can visit other user pages if you have
+       their URL.</p>
+    <p>This is your code now! Feel free to make changes, and don't be afraid to get creative!
+       You could start by modifying this page to tell the world more about your team.</p>
+  </body>
+</html>