= FCMSendPush =
Firebase Cloud Messaging example

== Structure ==
 *  [[attachment:structure.tar.gz]]
{{{#!highlight bash
.
├── build.sh
├── pom.xml
├── run.sh
├── src
│   └── main
│       ├── java
│       │   └── hello
│       │       ├── Application.java
│       │       ├── Data.java
│       │       ├── Message.java
│       │       ├── Notification.java
│       │       ├── PushMessage.java
│       │       ├── PushResponse.java
│       │       └── SendPushController.java
│       └── resources
│           ├── application.properties
│           ├── logback-spring.xml
│           └── templates
│               ├── sendpushform.html
│               └── sendpush.html
}}}

{{{#!highlight bash
build.sh
pom.xml
run.sh
src/main/java/hello/Application.java
src/main/java/hello/Data.java
src/main/java/hello/Message.java
src/main/java/hello/Notification.java
src/main/java/hello/PushMessage.java
src/main/java/hello/PushResponse.java
src/main/java/hello/SendPushController.java
src/main/resources/application.properties
src/main/resources/logback-spring.xml
src/main/resources/templates/sendpushform.html
src/main/resources/templates/sendpush.html
}}}

== build.sh ==
{{{#!highlight bash
#!/bin/sh
mvn clean install
}}}

== run.sh ==
{{{#!highlight bash
#!/bin/sh
# /tmp/outpush.log logback-spring.xml
# /tmp/greet.log logback-spring.xml
java -Dfilelog=/tmp/outpush.log -jar target/test-spring-boot-push-0.1.0.jar
}}}

== pom.xml ==
{{{#!highlight xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>hello</groupId>
    <artifactId>test-spring-boot-push</artifactId>
    <version>0.1.0</version>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.6.RELEASE</version>
    </parent>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>2.8.6</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>
    <properties>
        <start-class>hello.Application</start-class>
    </properties>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
    <repositories>
        <repository>
            <id>spring-milestone</id>
            <url>http://repo.spring.io/libs-release</url>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>spring-milestone</id>
            <url>http://repo.spring.io/libs-release</url>
        </pluginRepository>
    </pluginRepositories>
</project>
}}}

== src/main/java/hello/Application.java ==
{{{#!highlight java
package hello;

import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.SpringApplication;
import org.springframework.context.annotation.ComponentScan;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@ComponentScan //scans for @Component beans 
@EnableAutoConfiguration
public class Application {
    private static Logger logger;

    public static void main(String[] args) {
        logger = LoggerFactory.getLogger(Application.class);
        logger.info("Starting application");
        SpringApplication.run(Application.class, args);
    }
}
}}}

== src/main/java/hello/Message.java ==
{{{#!highlight java
package hello;

public class Message {
    private String message_id;

    public String getMessage_id() {
        return message_id;
    }

    public void setMessage_id(String message_id) {
        this.message_id = message_id;
    }
}
}}}

== src/main/java/hello/PushMessage.java ==
{{{#!highlight java
package hello;

public class PushMessage {
    private String to;
    private Data data;
    private Notification notification;

    public PushMessage() {
    }

    public Notification getNotification() {
        return notification;
    }

    public void setNotification(Notification notification) {
        this.notification = notification;
    }

    public Data getData() {
        return data;
    }

    public void setData(Data data) {
        this.data = data;
    }

    public String getTo() {
        return to;
    }

    public void setTo(String to) {
        this.to = to;
    }
}
}}}

== src/main/java/hello/SendPushController.java ==
{{{#!highlight java
package hello;

import org.springframework.core.env.Environment;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.ui.Model;
import org.springframework.util.MimeTypeUtils;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import com.google.gson.Gson;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@Controller
public class SendPushController {
    private static final String UTF_8 = "utf-8";
    private final Logger logger = LoggerFactory.getLogger(SendPushController.class);
    private Environment env;
    private String fcmKey;
    private String fcmSendUrl;

    public SendPushController(Environment env) {
        logger.debug("SendPush controller created.");
        this.env = env;
        this.fcmKey = this.env.getProperty("fcm.key");
        this.fcmSendUrl = this.env.getProperty("fcm.send.url");
    }

    @RequestMapping("/sendpush")
    // http://localhost:8181/sendpush
    public String sendpush(Model model) {
        logger.info("Greeting sendpush called.");
        model.addAttribute("title", "Send push");
        return "sendpush";
    }

    @RequestMapping(value = "/sendpushform", method = RequestMethod.POST)
    public String sendpushform(@RequestParam("dev_token") String devToken,
            @RequestParam("message_title") String messageTitle, @RequestParam("message") String message, Model model) {
        logger.info("Greeting sendpushform called.");
        model.addAttribute("devToken", devToken);
        model.addAttribute("message", message);
        model.addAttribute("messageTitle", messageTitle);
        model.addAttribute("title", "Send push result");

        try {
            URL url = new URL(this.fcmSendUrl);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod(HttpMethod.POST.name());

            connection.setRequestProperty(HttpHeaders.CONTENT_TYPE,
                    MimeTypeUtils.APPLICATION_JSON_VALUE + "; " + UTF_8);
            connection.setRequestProperty(HttpHeaders.ACCEPT, MimeTypeUtils.APPLICATION_JSON_VALUE);
            connection.setRequestProperty(HttpHeaders.AUTHORIZATION, "key=" + this.fcmKey);
            connection.setDoOutput(true);

            PushMessage push = new PushMessage();
            push.setTo(devToken);
            Data data = new Data();
            data.setBody(message);
            data.setTitle(messageTitle);
            push.setData(data);

            Notification notification = new Notification();
            notification.setBody(message);
            notification.setTitle(messageTitle);
            push.setNotification(notification);
            Gson gson = new Gson();
            String payload = gson.toJson(push);
            try (OutputStream os = connection.getOutputStream()) {
                byte[] input = payload.getBytes(UTF_8);
                os.write(input, 0, input.length);
            }

            try (BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream(), UTF_8))) {
                StringBuilder response = new StringBuilder();
                String responseLine = null;
                while ((responseLine = br.readLine()) != null) {
                    response.append(responseLine.trim());
                }
                PushResponse pr = gson.fromJson(response.toString(), PushResponse.class);
                model.addAttribute("prSuccess", pr.getSuccess());
                model.addAttribute("multicastId", pr.getMulticast_id());
            }

        } catch (Exception e) {
            e.printStackTrace();
        }

        return "sendpushform";
    }
}}}

== src/main/java/hello/Data.java ==
{{{#!highlight java
package hello;

public class Data {
    private String title;
    private String body;

    public Data() {
    }

    public String getBody() {
        return body;
    }

    public void setBody(String body) {
        this.body = body;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }
}
}}}

== src/main/java/hello/Notification.java ==
{{{#!highlight java
package hello;

public class Notification {
    private String title;
    private String body;

    public Notification() {
    }

    public String getBody() {
        return body;
    }

    public void setBody(String body) {
        this.body = body;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }
}
}}}

== src/main/java/hello/PushResponse.java ==
{{{#!highlight java
package hello;

public class PushResponse {

    private long multicast_id;
    private long success;
    private long failure;
    private long canonical_ids;
    private Message[] results;

    public Message[] getResults() {
        return results;
    }

    public long getCanonical_ids() {
        return canonical_ids;
    }

    public void setCanonical_ids(long canonical_ids) {
        this.canonical_ids = canonical_ids;
    }

    public long getFailure() {
        return failure;
    }

    public void setFailure(long failure) {
        this.failure = failure;
    }

    public long getSuccess() {
        return success;
    }

    public void setSuccess(long success) {
        this.success = success;
    }

    public long getMulticast_id() {
        return multicast_id;
    }

    public void setMulticast_id(long multicast_id) {
        this.multicast_id = multicast_id;
    }

    public void setResults(Message[] results) {
        this.results = results;
    }
}
}}}

== src/main/resources/application.properties  ==
{{{#!highlight bash
server.port=8181
fcm.key=AAAA(...)
fcm.send.url=https://fcm.googleapis.com/fcm/send
}}}

== src/main/resources/logback-spring.xml ==
{{{#!highlight xml
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<!--
    <include resource="org/springframework/boot/logging/logback/defaults.xml" />
    <property name="LOG_FILE" value="${LOG_FILE:-${LOG_PATH:-${LOG_TEMP:-${java.io.tmpdir:-/tmp}}/}spring.log}"/>
    <include resource="org/springframework/boot/logging/logback/file-appender.xml" />
-->
    <!-- override spring logback default behaviour -->
    <appender name="FILE" class="ch.qos.logback.core.FileAppender">
        <file>${filelog}</file>
        <encoder>
                <pattern>%date{ISO8601} [%thread] %-5level %logger{35} - %msg%n</pattern>
        </encoder>
    </appender>
    <appender name="GREETFILE" class="ch.qos.logback.core.FileAppender">
        <file>/tmp/greet.log</file>
        <encoder>
                <pattern>%date{ISO8601} [%thread] %-5level %logger{35} - %msg%n</pattern>
        </encoder>
    </appender>
    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
        <layout class="ch.qos.logback.classic.PatternLayout">
                <Pattern>%yellow(%date{ISO8601}) %green([%thread]) %highlight(%-5level) %cyan(%logger{35}) - %white(%msg%n) </Pattern>
        </layout>
    </appender>
    <root level="INFO">
        <appender-ref ref="FILE" />
        <appender-ref ref="CONSOLE"/>
    </root>
    <logger name="hello.GreetingController" level="debug" additivity="false">
        <appender-ref ref="GREETFILE"/>
        <appender-ref ref="CONSOLE" />
    </logger>
</configuration> 
}}}

== src/main/resources/templates/sendpushform.html ==
{{{#!highlight xml
<!DOCTYPE HTML>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <title>Send push result</title>
    <script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta1/dist/css/bootstrap.min.css" rel="stylesheet"         integrity="sha384-giJF6kkoqNQ00vy+HMDP7azOuL0xtbfIcaT9wjKHr8RbDVddVHyTfAAsrekwKmP1" crossorigin="anonymous" />
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta1/dist/js/bootstrap.bundle.min.js"
        integrity="sha384-ygbV9kiqUc6oa4msXn9868pTtWMgiQaeYH7/t7LECLbyPA2x65Kgf80OJFdroafW"
        crossorigin="anonymous"></script>
</head>
<body>
    <div class="container">
        <div class="row">
            <div class="col-2"></div>
            <div class="col-8">
                <div class="card text-white bg-success">
                    <div class="card-header">
                        <h1 th:text="${title}"></h1>
                    </div>
                    <div class="card-body bg-white" style="color:black;">
                        <h1 class="card-title">Dev token</h1>
                        <p class="card-text" th:text="${devToken}"></p>
                        <h1 class="card-title">Message title</h1>
                        <p class="card-text" th:text="${messageTitle}"></p>
                        <h1 class="card-title">Message</h1>
                        <p class="card-text" th:text="${message}"></p>
                        <h1 class="card-title">Push success</h1>
                        <p class="card-text" th:text="${prSuccess}"></p>
                        <h1 class="card-title">Push multicast Id</h1>
                        <p class="card-text" th:text="${multicastId}"></p>
                    </div>
                    <a href="/sendpush" class="btn btn-lg btn-primary btn-block">Go back</a>
                </div>
            </div>
            <div class="col-2"></div>
        </div>
    </div>
</body>
</html>
}}}

== src/main/resources/templates/sendpush.html ==
{{{#!highlight xml
<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <title>Send push</title>
    <script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta1/dist/css/bootstrap.min.css" rel="stylesheet"
        integrity="sha384-giJF6kkoqNQ00vy+HMDP7azOuL0xtbfIcaT9wjKHr8RbDVddVHyTfAAsrekwKmP1" crossorigin="anonymous" />
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta1/dist/js/bootstrap.bundle.min.js"
        integrity="sha384-ygbV9kiqUc6oa4msXn9868pTtWMgiQaeYH7/t7LECLbyPA2x65Kgf80OJFdroafW"
        crossorigin="anonymous"></script>
</head>
<body>
    <div class="container">
        <div class="row">
            <div class="col-2"></div>
            <div class="col-8">
                <div class="card text-white bg-primary">
                    <div class="card-header">
                        <h1 th:text="${title}"></h1>
                    </div>
                    <div class="card-body bg-white" style="color:black;">
                        <form action="sendpushform" method="POST">
                            <input type="text" name="dev_token" class="form-control" placeholder="dev token" />
                            <br />
                            <input type="text" name="message_title" class="form-control" placeholder="message title" />
                            <br />
                            <input type="text" name="message" class="form-control" placeholder="message" />
                            <br />
                            <input type="submit" value="Send push notification"
                                class="btn btn-lg btn-primary btn-block" />
                        </form>
                    </div>
                </div>
            </div>
            <div class="col-2"></div>
        </div>
    </div>
</body>
</html>
}}}