From 29eea417b9fd33b89c0ff3b5a32231d00420b878 Mon Sep 17 00:00:00 2001
From: BrendonCurmi <brendoncrm@gmail.com>
Date: Fri, 10 Apr 2020 11:22:55 +0200
Subject: [PATCH] Add update checker

---
 pom.xml                                       | 33 +++++++++-
 .../FusionPixelmon/FusionPixelmon.java        | 13 +++-
 .../FusionPixelmon/apis/UpdateChecker.java    | 60 +++++++++++++++++++
 3 files changed, 102 insertions(+), 4 deletions(-)
 create mode 100644 src/main/java/me/FusionDev/FusionPixelmon/apis/UpdateChecker.java

diff --git a/pom.xml b/pom.xml
index 1efa2ab..ea38dfa 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>io.BrendonCurmi</groupId>
     <artifactId>FusionPixelmon</artifactId>
-    <version>1.2</version>
+    <version>1.3</version>
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
@@ -42,5 +42,36 @@
             <artifactId>minecraftforge</artifactId>
             <version>1.12.2-14.23.5.2768</version>
         </dependency>
+
+        <dependency>
+            <groupId>org.json</groupId>
+            <artifactId>json</artifactId>
+            <version>20190722</version>
+        </dependency>
     </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>1.6</version>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                        <configuration>
+                            <artifactSet>
+                                <includes>
+                                    <include>org.json:json</include>
+                                </includes>
+                            </artifactSet>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
 </project>
\ No newline at end of file
diff --git a/src/main/java/me/FusionDev/FusionPixelmon/FusionPixelmon.java b/src/main/java/me/FusionDev/FusionPixelmon/FusionPixelmon.java
index 9bb38d7..64fd4dc 100644
--- a/src/main/java/me/FusionDev/FusionPixelmon/FusionPixelmon.java
+++ b/src/main/java/me/FusionDev/FusionPixelmon/FusionPixelmon.java
@@ -1,6 +1,7 @@
 package me.FusionDev.FusionPixelmon;
 
 import com.google.inject.Inject;
+import me.FusionDev.FusionPixelmon.apis.UpdateChecker;
 import me.FusionDev.FusionPixelmon.commands.ArcPlatesCmd;
 import me.FusionDev.FusionPixelmon.commands.PokeDesignerCmd;
 
@@ -27,6 +28,7 @@
 import org.spongepowered.api.text.Text;
 
 import java.io.File;
+import java.io.IOException;
 import java.nio.file.Path;
 
 import static com.pixelmonmod.pixelmon.Pixelmon.EVENT_BUS;
@@ -50,9 +52,9 @@ public static void main(String[] args) {
     // todo if change form and do something to affect form, wasted money
     // todo may need to update the lvl thing for nature as well
 
-    static final String ID = "fusionpixelmon";
-    static final String NAME = "FusionPixelmon";
-    static final String VERSION = "1.2";
+    public static final String ID = "fusionpixelmon";
+    public static final String NAME = "FusionPixelmon";
+    public static final String VERSION = "1.3";
 
     private static final String CMD_PERM = ID + ".command.";
 
@@ -141,6 +143,11 @@ public void postInit(GamePostInitializationEvent event) {
     @Listener
     public void onServerStart(GameStartedServerEvent event) {
         logger.info("Successfully running FusionPixelmon!");
+        try {
+            UpdateChecker.check(logger);
+        } catch (IOException ignored) {
+            // If an exception occurs, just don't check for newer versions
+        }
     }
 
     @Listener
diff --git a/src/main/java/me/FusionDev/FusionPixelmon/apis/UpdateChecker.java b/src/main/java/me/FusionDev/FusionPixelmon/apis/UpdateChecker.java
new file mode 100644
index 0000000..e30dfca
--- /dev/null
+++ b/src/main/java/me/FusionDev/FusionPixelmon/apis/UpdateChecker.java
@@ -0,0 +1,60 @@
+package me.FusionDev.FusionPixelmon.apis;
+
+import me.FusionDev.FusionPixelmon.FusionPixelmon;
+import org.json.JSONArray;
+import org.json.JSONObject;
+import org.slf4j.Logger;
+
+import java.io.*;
+import java.net.URL;
+import java.net.URLConnection;
+import java.nio.charset.StandardCharsets;
+
+public class UpdateChecker {
+
+    private static final String VERSIONS_ENDPOINT = "https://ore.spongepowered.org/api/v1/projects/" + FusionPixelmon.ID + "/versions";
+    private static final String ORE_VERSIONS = "https://ore.spongepowered.org/FusionDev/FusionPixelmon/versions";
+
+    public static void main(String[] args) throws IOException {
+        check(null);
+    }
+
+    public static void check(Logger logger) throws IOException {
+        JSONArray payload = readJsonFromUrl(VERSIONS_ENDPOINT);
+        // Get 0th element as versions are in order of latest first
+        JSONObject data = (JSONObject) payload.get(0);
+        String name = data.getString("name");
+        if (name != null && !name.equals(FusionPixelmon.VERSION)) {
+            logger.info("There is a newer version of FusionPixelmon available! Version " + name + " @ " + ORE_VERSIONS);
+        }
+    }
+
+    /**
+     * Reads the data from the specified url and extracts it as a {@link JSONObject}.
+     *
+     * @param url the url of the data.
+     * @return the data from the url as a JSONObject.
+     * @throws IOException if an I/O error occurs.
+     */
+    public static JSONArray readJsonFromUrl(String url) throws IOException {
+        URLConnection urlConnection = new URL(url).openConnection();
+        urlConnection.addRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20100101 Firefox/25.0");
+        InputStream inputStream = urlConnection.getInputStream();
+        BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, StandardCharsets.UTF_8));
+        return new JSONArray(read(reader));
+    }
+
+    /**
+     * Reads the data from the specified reader and returns it as a string.
+     *
+     * @param reader the reader.
+     * @return the contents of the reader.
+     * @throws IOException if an I/O error occurs.
+     */
+    private static String read(Reader reader) throws IOException {
+        StringBuilder builder = new StringBuilder();
+        int cp;
+        while ((cp = reader.read()) != -1) builder.append((char) cp);
+        return builder.toString();
+    }
+}