├── README.md
├── .gitignore
├── src
    └── main
    │   ├── webapp
    │       ├── WEB-INF
    │       │   ├── index.yaml
    │       │   └── appengine-web.xml
    │       ├── css
    │       │   ├── main.css
    │       │   └── user-page.css
    │       ├── user-page.html
    │       ├── index.html
    │       ├── aboutus.html
    │       └── js
    │       │   ├── navigation-loader.js
    │       │   └── user-page-loader.js
    │   └── java
    │       └── com
    │           └── google
    │               └── codeu
    │                   ├── servlets
    │                       ├── LogoutServlet.java
    │                       ├── LoginStatusServlet.java
    │                       ├── LoginServlet.java
    │                       └── MessageServlet.java
    │                   └── data
    │                       ├── Message.java
    │                       └── Datastore.java
├── CONTRIBUTING.md
├── pom.xml
└── LICENSE


/README.md:
--------------------------------------------------------------------------------
1 | # codeu-starter-project


--------------------------------------------------------------------------------
/.gitignore:
--------------------------------------------------------------------------------
1 | target
2 | .settings
3 | .classpath
4 | .project
5 | .idea
6 | *.iml
7 | .DS_Store
8 | 


--------------------------------------------------------------------------------
/src/main/webapp/WEB-INF/index.yaml:
--------------------------------------------------------------------------------
 1 | # Copyright 2019 Google Inc.
 2 | #
 3 | # Licensed under the Apache License, Version 2.0 (the "License");
 4 | # you may not use this file except in compliance with the License.
 5 | # You may obtain a copy of the License at
 6 | #
 7 | #     http://www.apache.org/licenses/LICENSE-2.0
 8 | #
 9 | # Unless required by applicable law or agreed to in writing, software
10 | # distributed under the License is distributed on an "AS IS" BASIS,
11 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 | # See the License for the specific language governing permissions and
13 | # limitations under the License.
14 | 
15 | indexes:
16 | - kind: Message
17 |   properties:
18 |   - name: user
19 |   - name: timestamp
20 |     direction: desc
21 | 


--------------------------------------------------------------------------------
/src/main/webapp/WEB-INF/appengine-web.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <!--
 3 |   Copyright 2010 Google Inc.
 4 | 
 5 |   Licensed under the Apache License, Version 2.0 (the "License");
 6 |   you may not use this file except in compliance with the License.
 7 |   You may obtain a copy of the License at
 8 | 
 9 |       http://www.apache.org/licenses/LICENSE-2.0
10 | 
11 |   Unless required by applicable law or agreed to in writing, software
12 |   distributed under the License is distributed on an "AS IS" BASIS,
13 |   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 |   See the License for the specific language governing permissions and
15 |   limitations under the License.
16 | -->
17 | 
18 | <appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
19 |   <application>YOUR_PROJECT_ID</application>
20 |   <version>1</version>
21 |   <threadsafe>false</threadsafe>
22 |   <sessions-enabled>true</sessions-enabled>
23 |   <runtime>java8</runtime>
24 | </appengine-web-app>
25 | 


--------------------------------------------------------------------------------
/src/main/webapp/css/main.css:
--------------------------------------------------------------------------------
 1 | /*
 2 |  * Copyright 2019 Google Inc.
 3 |  *
 4 |  * Licensed under the Apache License, Version 2.0 (the "License");
 5 |  * you may not use this file except in compliance with the License.
 6 |  * You may obtain a copy of the License at
 7 |  *
 8 |  *     http://www.apache.org/licenses/LICENSE-2.0
 9 |  *
10 |  * Unless required by applicable law or agreed to in writing, software
11 |  * distributed under the License is distributed on an "AS IS" BASIS,
12 |  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 |  * See the License for the specific language governing permissions and
14 |  * limitations under the License.
15 |  */
16 | 
17 | /* Prevent the page from becoming too wide. */
18 | body {
19 |   max-width: 600px;
20 | }
21 | 
22 | /* Remove bullet points from navigation bar. */
23 | nav ul {
24 |   list-style-type: none;
25 |   padding-left: 0;
26 | }
27 | 
28 | /* Keep navigation menu on one line. */
29 | nav li {
30 |   display: inline-block;
31 |   margin-right: 10px
32 | }
33 | 


--------------------------------------------------------------------------------
/CONTRIBUTING.md:
--------------------------------------------------------------------------------
 1 | # How to Contribute
 2 | 
 3 | We'd love to accept your patches and contributions to this project. There are
 4 | just a few small guidelines you need to follow.
 5 | 
 6 | ## Contributor License Agreement
 7 | 
 8 | Contributions to this project must be accompanied by a Contributor License
 9 | Agreement. You (or your employer) retain the copyright to your contribution;
10 | this simply gives us permission to use and redistribute your contributions as
11 | part of the project. Head over to <https://cla.developers.google.com/> to see
12 | your current agreements on file or to sign a new one.
13 | 
14 | You generally only need to submit a CLA once, so if you've already submitted one
15 | (even if it was for a different project), you probably don't need to do it
16 | again.
17 | 
18 | ## Code reviews
19 | 
20 | All submissions, including submissions by project members, require review. We
21 | use GitHub pull requests for this purpose. Consult
22 | [GitHub Help](https://help.github.com/articles/about-pull-requests/) for more
23 | information on using pull requests.
24 | 
25 | ## Community Guidelines
26 | 
27 | This project follows
28 | [Google's Open Source Community Guidelines](https://opensource.google.com/conduct/).


--------------------------------------------------------------------------------
/src/main/webapp/css/user-page.css:
--------------------------------------------------------------------------------
 1 | /*
 2 |  * Copyright 2019 Google Inc.
 3 |  *
 4 |  * Licensed under the Apache License, Version 2.0 (the "License");
 5 |  * you may not use this file except in compliance with the License.
 6 |  * You may obtain a copy of the License at
 7 |  *
 8 |  *     http://www.apache.org/licenses/LICENSE-2.0
 9 |  *
10 |  * Unless required by applicable law or agreed to in writing, software
11 |  * distributed under the License is distributed on an "AS IS" BASIS,
12 |  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 |  * See the License for the specific language governing permissions and
14 |  * limitations under the License.
15 |  */
16 | 
17 | /* Set the size of the message input to be 100 pixels high
18 |    and will fill the width of its parent element. */
19 | #message-input {
20 |   height: 100px;
21 |   width: 100%;
22 | }
23 | 
24 | /* Give each message a rounded border. */
25 | .message-div {
26 |   border: thin solid black;
27 |   border-radius: 5px;
28 |   margin-top: 20px;
29 | }
30 | 
31 | /* Add a bottom border to the message header. */
32 | .message-header {
33 |   border-bottom: thin solid black;
34 |   padding: 5px;
35 | }
36 | 
37 | /* Give the message body a margin so the text
38 |    isn't too close to the border. */
39 | .message-body {
40 |   margin: 5px;
41 | }
42 | 
43 | /* Use this to hide certain elements like forms if the
44 |    user is not logged in or viewing their own page. */
45 | .hidden {
46 |   display: none;
47 | }


--------------------------------------------------------------------------------
/src/main/webapp/user-page.html:
--------------------------------------------------------------------------------
 1 | <!--
 2 | Copyright 2019 Google Inc.
 3 | 
 4 | Licensed under the Apache License, Version 2.0 (the "License");
 5 | you may not use this file except in compliance with the License.
 6 | You may obtain a copy of the License at
 7 | 
 8 |     http://www.apache.org/licenses/LICENSE-2.0
 9 | 
10 | Unless required by applicable law or agreed to in writing, software
11 | distributed under the License is distributed on an "AS IS" BASIS,
12 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 | See the License for the specific language governing permissions and
14 | limitations under the License.
15 | -->
16 | 
17 | <!DOCTYPE html>
18 | <html>
19 |   <head>
20 |     <title>User Page</title>
21 |     <meta charset="UTF-8">
22 |     <link rel="stylesheet" href="/css/main.css">
23 |     <link rel="stylesheet" href="/css/user-page.css">
24 |     <script src="/js/user-page-loader.js"></script>
25 |   </head>
26 |   <body onload="buildUI();">
27 |     <nav>
28 |       <ul id="navigation">
29 |         <li><a href="/">Home</a></li>
30 |         <li><a href="/aboutus.html">About Our Team</a></li>
31 |       </ul>
32 |     </nav>
33 |     <h1 id="page-title">User Page</h1>
34 | 
35 |     <form id="message-form" action="/messages" method="POST" class="hidden">
36 |       Enter a new message:
37 |       <br/>
38 |       <textarea name="text" id="message-input"></textarea>
39 |       <br/>
40 |       <input type="submit" value="Submit">
41 |     </form>
42 |     <hr/>
43 | 
44 |     <div id="message-container">Loading...</div>
45 | 
46 |   </body>
47 | </html>
48 | 


--------------------------------------------------------------------------------
/src/main/webapp/index.html:
--------------------------------------------------------------------------------
 1 | <!--
 2 | Copyright 2019 Google Inc.
 3 | 
 4 | Licensed under the Apache License, Version 2.0 (the "License");
 5 | you may not use this file except in compliance with the License.
 6 | You may obtain a copy of the License at
 7 | 
 8 |     http://www.apache.org/licenses/LICENSE-2.0
 9 | 
10 | Unless required by applicable law or agreed to in writing, software
11 | distributed under the License is distributed on an "AS IS" BASIS,
12 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 | See the License for the specific language governing permissions and
14 | limitations under the License.
15 | -->
16 | 
17 | <!DOCTYPE html>
18 | <html>
19 |   <head>
20 |     <meta charset="UTF-8">
21 |     <title>CodeU 2019 Starter Project</title>
22 |     <link rel="stylesheet" href="/css/main.css">
23 |     <script src="/js/navigation-loader.js"></script>
24 |   </head>
25 |   <body onload="addLoginOrLogoutLinkToNavigation();">
26 |     <nav>
27 |       <ul id="navigation">
28 |         <li><a href="/">Home</a></li>
29 |         <li><a href="/aboutus.html">About Our Team</a></li>
30 |       </ul>
31 |     </nav>
32 |     <h1>CodeU Starter Project</h1>
33 |     <p>This is the CodeU starter project. Click the links above to login and visit your page.
34 |     You can post messages on your page, and you can visit other user pages if you have
35 |     their URL.</p>
36 |     <p>This is your code now! Feel free to make changes, and don't be afraid to get creative!
37 |     You could start by modifying this page to tell the world more about your team.</p>
38 |   </body>
39 | </html>
40 | 


--------------------------------------------------------------------------------
/src/main/java/com/google/codeu/servlets/LogoutServlet.java:
--------------------------------------------------------------------------------
 1 | /*
 2 |  * Copyright 2019 Google Inc.
 3 |  *
 4 |  * Licensed under the Apache License, Version 2.0 (the "License");
 5 |  * you may not use this file except in compliance with the License.
 6 |  * You may obtain a copy of the License at
 7 |  *
 8 |  *     http://www.apache.org/licenses/LICENSE-2.0
 9 |  *
10 |  * Unless required by applicable law or agreed to in writing, software
11 |  * distributed under the License is distributed on an "AS IS" BASIS,
12 |  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 |  * See the License for the specific language governing permissions and
14 |  * limitations under the License.
15 |  */
16 | 
17 | package com.google.codeu.servlets;
18 | 
19 | import com.google.appengine.api.users.UserService;
20 | import com.google.appengine.api.users.UserServiceFactory;
21 | import java.io.IOException;
22 | import javax.servlet.annotation.WebServlet;
23 | import javax.servlet.http.HttpServlet;
24 | import javax.servlet.http.HttpServletRequest;
25 | import javax.servlet.http.HttpServletResponse;
26 | 
27 | /**
28 |  * Redirects the user to the Google logout page, which then redirects to the homepage.
29 |  */
30 | @WebServlet("/logout")
31 | public class LogoutServlet extends HttpServlet {
32 | 
33 |   @Override
34 |   public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
35 |     UserService userService = UserServiceFactory.getUserService();
36 |     String googleLogoutUrl = userService.createLogoutURL("/index.html");
37 |     response.sendRedirect(googleLogoutUrl);
38 |   }
39 | }
40 | 


--------------------------------------------------------------------------------
/src/main/java/com/google/codeu/data/Message.java:
--------------------------------------------------------------------------------
 1 | /*
 2 |  * Copyright 2019 Google Inc.
 3 |  *
 4 |  * Licensed under the Apache License, Version 2.0 (the "License");
 5 |  * you may not use this file except in compliance with the License.
 6 |  * You may obtain a copy of the License at
 7 |  *
 8 |  *     http://www.apache.org/licenses/LICENSE-2.0
 9 |  *
10 |  * Unless required by applicable law or agreed to in writing, software
11 |  * distributed under the License is distributed on an "AS IS" BASIS,
12 |  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 |  * See the License for the specific language governing permissions and
14 |  * limitations under the License.
15 |  */
16 | 
17 | package com.google.codeu.data;
18 | 
19 | import java.util.UUID;
20 | 
21 | /** A single message posted by a user. */
22 | public class Message {
23 | 
24 |   private UUID id;
25 |   private String user;
26 |   private String text;
27 |   private long timestamp;
28 | 
29 |   /**
30 |    * Constructs a new {@link Message} posted by {@code user} with {@code text} content. Generates a
31 |    * random ID and uses the current system time for the creation time.
32 |    */
33 |   public Message(String user, String text) {
34 |     this(UUID.randomUUID(), user, text, System.currentTimeMillis());
35 |   }
36 | 
37 |   public Message(UUID id, String user, String text, long timestamp) {
38 |     this.id = id;
39 |     this.user = user;
40 |     this.text = text;
41 |     this.timestamp = timestamp;
42 |   }
43 | 
44 |   public UUID getId() {
45 |     return id;
46 |   }
47 | 
48 |   public String getUser() {
49 |     return user;
50 |   }
51 | 
52 |   public String getText() {
53 |     return text;
54 |   }
55 | 
56 |   public long getTimestamp() {
57 |     return timestamp;
58 |   }
59 | }
60 | 


--------------------------------------------------------------------------------
/src/main/webapp/aboutus.html:
--------------------------------------------------------------------------------
 1 | <!--
 2 | Copyright 2019 Google Inc.
 3 | 
 4 | Licensed under the Apache License, Version 2.0 (the "License");
 5 | you may not use this file except in compliance with the License.
 6 | You may obtain a copy of the License at
 7 | 
 8 |     http://www.apache.org/licenses/LICENSE-2.0
 9 | 
10 | Unless required by applicable law or agreed to in writing, software
11 | distributed under the License is distributed on an "AS IS" BASIS,
12 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 | See the License for the specific language governing permissions and
14 | limitations under the License.
15 | -->
16 | 
17 | <!DOCTYPE html>
18 | <html>
19 |   <head>
20 |     <meta charset="UTF-8">
21 |     <title>About Us</title>
22 |     <link rel="stylesheet" href="/css/main.css">
23 |   </head>
24 |   <body>
25 |     <nav>
26 |       <ul id="navigation">
27 |         <li><a href="/">Home</a></li>
28 |         <li><a href="/aboutus.html">About Our Team</a></li>
29 |       </ul>
30 |     </nav>
31 |     <h1>About Our Team</h1>
32 |     <h2>Teammate A Name</h2>
33 |     <ul>
34 |       <li>Summer Feelz: </li>
35 |       <li>Aspirational Hobby: </li>
36 |       <li>Ask me About: </li>
37 |     </ul>
38 |     <h2>Teammate B Name</h2>
39 |     <ul>
40 |       <li>Summer Feelz: </li>
41 |       <li>Aspirational Hobby: </li>
42 |       <li>Ask me About: </li>
43 |     </ul>
44 |     <h2>Teammate C Name</h2>
45 |     <ul>
46 |       <li>Summer Feelz: </li>
47 |       <li>Aspirational Hobby: </li>
48 |       <li>Ask me About: </li>
49 |     </ul>
50 |     <h2>Teammate D Name (delete if your team only has 3 students) </h2>
51 |     <ul>
52 |       <li>Summer Feelz: </li>
53 |       <li>Aspirational Hobby: </li>
54 |       <li>Ask me About: </li>
55 |     </ul>
56 |   </body>
57 | </html>
58 | 


--------------------------------------------------------------------------------
/src/main/java/com/google/codeu/servlets/LoginStatusServlet.java:
--------------------------------------------------------------------------------
 1 | /*
 2 |  * Copyright 2019 Google Inc.
 3 |  *
 4 |  * Licensed under the Apache License, Version 2.0 (the "License");
 5 |  * you may not use this file except in compliance with the License.
 6 |  * You may obtain a copy of the License at
 7 |  *
 8 |  *     http://www.apache.org/licenses/LICENSE-2.0
 9 |  *
10 |  * Unless required by applicable law or agreed to in writing, software
11 |  * distributed under the License is distributed on an "AS IS" BASIS,
12 |  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 |  * See the License for the specific language governing permissions and
14 |  * limitations under the License.
15 |  */
16 | 
17 | package com.google.codeu.servlets;
18 | 
19 | import com.google.appengine.api.users.UserService;
20 | import com.google.appengine.api.users.UserServiceFactory;
21 | import com.google.gson.JsonObject;
22 | 
23 | import java.io.IOException;
24 | import javax.servlet.annotation.WebServlet;
25 | import javax.servlet.http.HttpServlet;
26 | import javax.servlet.http.HttpServletRequest;
27 | import javax.servlet.http.HttpServletResponse;
28 | 
29 | /**
30 |  * Returns login data as JSON, e.g. {"isLoggedIn": true, "username": "alovelace@codeustudents.com"}
31 |  */
32 | @WebServlet("/login-status")
33 | public class LoginStatusServlet extends HttpServlet {
34 | 
35 |   @Override
36 |   public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
37 | 
38 |     JsonObject jsonObject = new JsonObject();
39 | 
40 |     UserService userService = UserServiceFactory.getUserService();
41 |     if (userService.isUserLoggedIn()) {
42 |       jsonObject.addProperty("isLoggedIn", true);
43 |       jsonObject.addProperty("username", userService.getCurrentUser().getEmail());
44 |     } else {
45 |       jsonObject.addProperty("isLoggedIn", false);
46 |     }
47 | 
48 |     response.setContentType("application/json");
49 |     response.getWriter().println(jsonObject.toString());
50 |   }
51 | }
52 | 


--------------------------------------------------------------------------------
/src/main/java/com/google/codeu/servlets/LoginServlet.java:
--------------------------------------------------------------------------------
 1 | /*
 2 |  * Copyright 2019 Google Inc.
 3 |  *
 4 |  * Licensed under the Apache License, Version 2.0 (the "License");
 5 |  * you may not use this file except in compliance with the License.
 6 |  * You may obtain a copy of the License at
 7 |  *
 8 |  *     http://www.apache.org/licenses/LICENSE-2.0
 9 |  *
10 |  * Unless required by applicable law or agreed to in writing, software
11 |  * distributed under the License is distributed on an "AS IS" BASIS,
12 |  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 |  * See the License for the specific language governing permissions and
14 |  * limitations under the License.
15 |  */
16 | 
17 | 
18 | package com.google.codeu.servlets;
19 | 
20 | import com.google.appengine.api.users.UserService;
21 | import com.google.appengine.api.users.UserServiceFactory;
22 | import java.io.IOException;
23 | import javax.servlet.annotation.WebServlet;
24 | import javax.servlet.http.HttpServlet;
25 | import javax.servlet.http.HttpServletRequest;
26 | import javax.servlet.http.HttpServletResponse;
27 | 
28 | /**
29 |  * Redirects the user to the Google login page or their page if they're already logged in.
30 |  */
31 | @WebServlet("/login")
32 | public class LoginServlet extends HttpServlet {
33 | 
34 |   @Override
35 |   public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
36 | 
37 |     UserService userService = UserServiceFactory.getUserService();
38 | 
39 |     // If the user is already logged in, redirect to their page
40 |     if (userService.isUserLoggedIn()) {
41 |       String user = userService.getCurrentUser().getEmail();
42 |       response.sendRedirect("/user-page.html?user=" + user);
43 |       return;
44 |     }
45 | 
46 |     // Redirect to Google login page. That page will then redirect back to /login,
47 |     // which will be handled by the above if statement.
48 |     String googleLoginUrl = userService.createLoginURL("/login");
49 |     response.sendRedirect(googleLoginUrl);
50 |   }
51 | }
52 | 


--------------------------------------------------------------------------------
/src/main/webapp/js/navigation-loader.js:
--------------------------------------------------------------------------------
 1 | /*
 2 |  * Copyright 2019 Google Inc.
 3 |  *
 4 |  * Licensed under the Apache License, Version 2.0 (the "License");
 5 |  * you may not use this file except in compliance with the License.
 6 |  * You may obtain a copy of the License at
 7 |  *
 8 |  *     http://www.apache.org/licenses/LICENSE-2.0
 9 |  *
10 |  * Unless required by applicable law or agreed to in writing, software
11 |  * distributed under the License is distributed on an "AS IS" BASIS,
12 |  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 |  * See the License for the specific language governing permissions and
14 |  * limitations under the License.
15 |  */
16 | 
17 | /**
18 |  * Adds a login or logout link to the page, depending on whether the user is
19 |  * already logged in.
20 |  */
21 | function addLoginOrLogoutLinkToNavigation() {
22 |   const navigationElement = document.getElementById('navigation');
23 |   if (!navigationElement) {
24 |     console.warn('Navigation element not found!');
25 |     return;
26 |   }
27 | 
28 |   fetch('/login-status')
29 |       .then((response) => {
30 |         return response.json();
31 |       })
32 |       .then((loginStatus) => {
33 |         if (loginStatus.isLoggedIn) {
34 |           navigationElement.appendChild(createListItem(createLink(
35 |               '/user-page.html?user=' + loginStatus.username, 'Your Page')));
36 | 
37 |           navigationElement.appendChild(
38 |               createListItem(createLink('/logout', 'Logout')));
39 |         } else {
40 |           navigationElement.appendChild(
41 |               createListItem(createLink('/login', 'Login')));
42 |         }
43 |       });
44 | }
45 | 
46 | /**
47 |  * Creates an li element.
48 |  * @param {Element} childElement
49 |  * @return {Element} li element
50 |  */
51 | function createListItem(childElement) {
52 |   const listItemElement = document.createElement('li');
53 |   listItemElement.appendChild(childElement);
54 |   return listItemElement;
55 | }
56 | 
57 | /**
58 |  * Creates an anchor element.
59 |  * @param {string} url
60 |  * @param {string} text
61 |  * @return {Element} Anchor element
62 |  */
63 | function createLink(url, text) {
64 |   const linkElement = document.createElement('a');
65 |   linkElement.appendChild(document.createTextNode(text));
66 |   linkElement.href = url;
67 |   return linkElement;
68 | }
69 | 


--------------------------------------------------------------------------------
/pom.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <!--
 3 | Copyright 2019 Google Inc.
 4 | 
 5 | Licensed under the Apache License, Version 2.0 (the "License");
 6 | you may not use this file except in compliance with the License.
 7 | You may obtain a copy of the License at
 8 | 
 9 |     http://www.apache.org/licenses/LICENSE-2.0
10 | 
11 | Unless required by applicable law or agreed to in writing, software
12 | distributed under the License is distributed on an "AS IS" BASIS,
13 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 | See the License for the specific language governing permissions and
15 | limitations under the License.
16 | -->
17 | <project xmlns="http://maven.apache.org/POM/4.0.0"
18 |     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
19 |     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
20 |   <modelVersion>4.0.0</modelVersion>
21 | 
22 |   <groupId>com.google.codeu</groupId>
23 |   <artifactId>codeu-starter-project</artifactId>
24 |   <version>0.0.1-SNAPSHOT</version>
25 |   <packaging>war</packaging>
26 | 
27 |   <name>codeu-starter-project</name>
28 |   <url>http://maven.apache.org</url>
29 | 
30 |   <properties>
31 |     <maven.compiler.source>1.8</maven.compiler.source>
32 |     <maven.compiler.target>1.8</maven.compiler.target>
33 |     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
34 |     <failOnMissingWebXml>false</failOnMissingWebXml>
35 |   </properties>
36 | 
37 |   <dependencies>
38 | 
39 |     <dependency>
40 |       <groupId>javax.servlet</groupId>
41 |       <artifactId>javax.servlet-api</artifactId>
42 |       <version>3.1.0</version>
43 |       <scope>provided</scope>
44 |     </dependency>
45 | 
46 |     <dependency>
47 |       <groupId>com.google.appengine</groupId>
48 |       <artifactId>appengine-api-1.0-sdk</artifactId>
49 |       <version>1.9.59</version>
50 |     </dependency>
51 | 
52 |     <dependency>
53 |       <groupId>org.jsoup</groupId>
54 |       <artifactId>jsoup</artifactId>
55 |       <version>1.8.3</version>
56 |     </dependency>
57 | 
58 |     <dependency>
59 |       <groupId>com.google.cloud</groupId>
60 |       <artifactId>google-cloud-datastore</artifactId>
61 |       <version>1.52.0</version>
62 |     </dependency>
63 | 
64 |   </dependencies>
65 | 
66 |   <build>
67 |     <plugins>
68 |       <plugin>
69 |         <groupId>com.google.appengine</groupId>
70 |         <artifactId>appengine-maven-plugin</artifactId>
71 |         <version>1.9.59</version>
72 |       </plugin>
73 |     </plugins>
74 |   </build>
75 | </project>
76 | 


--------------------------------------------------------------------------------
/src/main/java/com/google/codeu/servlets/MessageServlet.java:
--------------------------------------------------------------------------------
 1 | /*
 2 |  * Copyright 2019 Google Inc.
 3 |  *
 4 |  * Licensed under the Apache License, Version 2.0 (the "License");
 5 |  * you may not use this file except in compliance with the License.
 6 |  * You may obtain a copy of the License at
 7 |  *
 8 |  *     http://www.apache.org/licenses/LICENSE-2.0
 9 |  *
10 |  * Unless required by applicable law or agreed to in writing, software
11 |  * distributed under the License is distributed on an "AS IS" BASIS,
12 |  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 |  * See the License for the specific language governing permissions and
14 |  * limitations under the License.
15 |  */
16 | 
17 | package com.google.codeu.servlets;
18 | 
19 | import com.google.appengine.api.users.UserService;
20 | import com.google.appengine.api.users.UserServiceFactory;
21 | import com.google.codeu.data.Datastore;
22 | import com.google.codeu.data.Message;
23 | import com.google.gson.Gson;
24 | import java.io.IOException;
25 | import java.util.List;
26 | import javax.servlet.annotation.WebServlet;
27 | import javax.servlet.http.HttpServlet;
28 | import javax.servlet.http.HttpServletRequest;
29 | import javax.servlet.http.HttpServletResponse;
30 | import org.jsoup.Jsoup;
31 | import org.jsoup.safety.Whitelist;
32 | 
33 | /** Handles fetching and saving {@link Message} instances. */
34 | @WebServlet("/messages")
35 | public class MessageServlet extends HttpServlet {
36 | 
37 |   private Datastore datastore;
38 | 
39 |   @Override
40 |   public void init() {
41 |     datastore = new Datastore();
42 |   }
43 | 
44 |   /**
45 |    * Responds with a JSON representation of {@link Message} data for a specific user. Responds with
46 |    * an empty array if the user is not provided.
47 |    */
48 |   @Override
49 |   public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
50 | 
51 |     response.setContentType("application/json");
52 | 
53 |     String user = request.getParameter("user");
54 | 
55 |     if (user == null || user.equals("")) {
56 |       // Request is invalid, return empty array
57 |       response.getWriter().println("[]");
58 |       return;
59 |     }
60 | 
61 |     List<Message> messages = datastore.getMessages(user);
62 |     Gson gson = new Gson();
63 |     String json = gson.toJson(messages);
64 | 
65 |     response.getWriter().println(json);
66 |   }
67 | 
68 |   /** Stores a new {@link Message}. */
69 |   @Override
70 |   public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {
71 | 
72 |     UserService userService = UserServiceFactory.getUserService();
73 |     if (!userService.isUserLoggedIn()) {
74 |       response.sendRedirect("/index.html");
75 |       return;
76 |     }
77 | 
78 |     String user = userService.getCurrentUser().getEmail();
79 |     String text = Jsoup.clean(request.getParameter("text"), Whitelist.none());
80 | 
81 |     Message message = new Message(user, text);
82 |     datastore.storeMessage(message);
83 | 
84 |     response.sendRedirect("/user-page.html?user=" + user);
85 |   }
86 | }
87 | 


--------------------------------------------------------------------------------
/src/main/java/com/google/codeu/data/Datastore.java:
--------------------------------------------------------------------------------
 1 | /*
 2 |  * Copyright 2019 Google Inc.
 3 |  *
 4 |  * Licensed under the Apache License, Version 2.0 (the "License");
 5 |  * you may not use this file except in compliance with the License.
 6 |  * You may obtain a copy of the License at
 7 |  *
 8 |  *     http://www.apache.org/licenses/LICENSE-2.0
 9 |  *
10 |  * Unless required by applicable law or agreed to in writing, software
11 |  * distributed under the License is distributed on an "AS IS" BASIS,
12 |  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 |  * See the License for the specific language governing permissions and
14 |  * limitations under the License.
15 |  */
16 | 
17 | package com.google.codeu.data;
18 | 
19 | import com.google.appengine.api.datastore.DatastoreService;
20 | import com.google.appengine.api.datastore.DatastoreServiceFactory;
21 | import com.google.appengine.api.datastore.Entity;
22 | import com.google.appengine.api.datastore.PreparedQuery;
23 | import com.google.appengine.api.datastore.Query;
24 | import com.google.appengine.api.datastore.Query.FilterOperator;
25 | import com.google.appengine.api.datastore.Query.SortDirection;
26 | import java.util.ArrayList;
27 | import java.util.List;
28 | import java.util.UUID;
29 | 
30 | /** Provides access to the data stored in Datastore. */
31 | public class Datastore {
32 | 
33 |   private DatastoreService datastore;
34 | 
35 |   public Datastore() {
36 |     datastore = DatastoreServiceFactory.getDatastoreService();
37 |   }
38 | 
39 |   /** Stores the Message in Datastore. */
40 |   public void storeMessage(Message message) {
41 |     Entity messageEntity = new Entity("Message", message.getId().toString());
42 |     messageEntity.setProperty("user", message.getUser());
43 |     messageEntity.setProperty("text", message.getText());
44 |     messageEntity.setProperty("timestamp", message.getTimestamp());
45 | 
46 |     datastore.put(messageEntity);
47 |   }
48 | 
49 |   /**
50 |    * Gets messages posted by a specific user.
51 |    *
52 |    * @return a list of messages posted by the user, or empty list if user has never posted a
53 |    *     message. List is sorted by time descending.
54 |    */
55 |   public List<Message> getMessages(String user) {
56 |     List<Message> messages = new ArrayList<>();
57 | 
58 |     Query query =
59 |         new Query("Message")
60 |             .setFilter(new Query.FilterPredicate("user", FilterOperator.EQUAL, user))
61 |             .addSort("timestamp", SortDirection.DESCENDING);
62 |     PreparedQuery results = datastore.prepare(query);
63 | 
64 |     for (Entity entity : results.asIterable()) {
65 |       try {
66 |         String idString = entity.getKey().getName();
67 |         UUID id = UUID.fromString(idString);
68 |         String text = (String) entity.getProperty("text");
69 |         long timestamp = (long) entity.getProperty("timestamp");
70 | 
71 |         Message message = new Message(id, user, text, timestamp);
72 |         messages.add(message);
73 |       } catch (Exception e) {
74 |         System.err.println("Error reading message.");
75 |         System.err.println(entity.toString());
76 |         e.printStackTrace();
77 |       }
78 |     }
79 | 
80 |     return messages;
81 |   }
82 | }
83 | 


--------------------------------------------------------------------------------
/src/main/webapp/js/user-page-loader.js:
--------------------------------------------------------------------------------
 1 | /*
 2 |  * Copyright 2019 Google Inc.
 3 |  *
 4 |  * Licensed under the Apache License, Version 2.0 (the "License");
 5 |  * you may not use this file except in compliance with the License.
 6 |  * You may obtain a copy of the License at
 7 |  *
 8 |  *     http://www.apache.org/licenses/LICENSE-2.0
 9 |  *
10 |  * Unless required by applicable law or agreed to in writing, software
11 |  * distributed under the License is distributed on an "AS IS" BASIS,
12 |  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 |  * See the License for the specific language governing permissions and
14 |  * limitations under the License.
15 |  */
16 | 
17 | // Get ?user=XYZ parameter value
18 | const urlParams = new URLSearchParams(window.location.search);
19 | const parameterUsername = urlParams.get('user');
20 | 
21 | // URL must include ?user=XYZ parameter. If not, redirect to homepage.
22 | if (!parameterUsername) {
23 |   window.location.replace('/');
24 | }
25 | 
26 | /** Sets the page title based on the URL parameter username. */
27 | function setPageTitle() {
28 |   document.getElementById('page-title').innerText = parameterUsername;
29 |   document.title = parameterUsername + ' - User Page';
30 | }
31 | 
32 | /**
33 |  * Shows the message form if the user is logged in and viewing their own page.
34 |  */
35 | function showMessageFormIfViewingSelf() {
36 |   fetch('/login-status')
37 |       .then((response) => {
38 |         return response.json();
39 |       })
40 |       .then((loginStatus) => {
41 |         if (loginStatus.isLoggedIn &&
42 |             loginStatus.username == parameterUsername) {
43 |           const messageForm = document.getElementById('message-form');
44 |           messageForm.classList.remove('hidden');
45 |         }
46 |       });
47 | }
48 | 
49 | /** Fetches messages and add them to the page. */
50 | function fetchMessages() {
51 |   const url = '/messages?user=' + parameterUsername;
52 |   fetch(url)
53 |       .then((response) => {
54 |         return response.json();
55 |       })
56 |       .then((messages) => {
57 |         const messagesContainer = document.getElementById('message-container');
58 |         if (messages.length == 0) {
59 |           messagesContainer.innerHTML = '<p>This user has no posts yet.</p>';
60 |         } else {
61 |           messagesContainer.innerHTML = '';
62 |         }
63 |         messages.forEach((message) => {
64 |           const messageDiv = buildMessageDiv(message);
65 |           messagesContainer.appendChild(messageDiv);
66 |         });
67 |       });
68 | }
69 | 
70 | /**
71 |  * Builds an element that displays the message.
72 |  * @param {Message} message
73 |  * @return {Element}
74 |  */
75 | function buildMessageDiv(message) {
76 |   const headerDiv = document.createElement('div');
77 |   headerDiv.classList.add('message-header');
78 |   headerDiv.appendChild(document.createTextNode(
79 |       message.user + ' - ' + new Date(message.timestamp)));
80 | 
81 |   const bodyDiv = document.createElement('div');
82 |   bodyDiv.classList.add('message-body');
83 |   bodyDiv.innerHTML = message.text;
84 | 
85 |   const messageDiv = document.createElement('div');
86 |   messageDiv.classList.add('message-div');
87 |   messageDiv.appendChild(headerDiv);
88 |   messageDiv.appendChild(bodyDiv);
89 | 
90 |   return messageDiv;
91 | }
92 | 
93 | /** Fetches data and populates the UI of the page. */
94 | function buildUI() {
95 |   setPageTitle();
96 |   showMessageFormIfViewingSelf();
97 |   fetchMessages();
98 | }


--------------------------------------------------------------------------------
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