Initial commit

.gitignore

+/bin/
+/target/
+/.settings/
+/.idea/
+/.m2/
+.classpath
+.project
+ResourcePackAPI.iml
\ No newline at end of file

pom.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>com.kasprr</groupId>
+  <artifactId>ResourcePackAPI</artifactId>
+  <version>1.0-SNAPSHOT</version>
+  <packaging>jar</packaging>
+
+  <name>ResourcePackAPI</name>
+
+  <properties>
+    <java.version>1.8</java.version>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>3.8.1</version>
+        <configuration>
+          <source>${java.version}</source>
+          <target>${java.version}</target>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-shade-plugin</artifactId>
+        <version>3.2.4</version>
+        <executions>
+          <execution>
+            <phase>package</phase>
+            <goals>
+              <goal>shade</goal>
+            </goals>
+            <configuration>
+              <createDependencyReducedPom>false</createDependencyReducedPom>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+    <resources>
+      <resource>
+        <directory>src/main/resources</directory>
+        <filtering>true</filtering>
+      </resource>
+    </resources>
+  </build>
+
+  <repositories>
+    <repository>
+      <id>spigotmc-repo</id>
+      <url>https://hub.spigotmc.org/nexus/content/repositories/snapshots/</url>
+    </repository>
+    <repository>
+      <id>sonatype</id>
+      <url>https://oss.sonatype.org/content/groups/public/</url>
+    </repository>
+  </repositories>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.spigotmc</groupId>
+      <artifactId>spigot-api</artifactId>
+      <version>1.16.5-R0.1-SNAPSHOT</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>net.lingala.zip4j</groupId>
+      <artifactId>zip4j</artifactId>
+      <version>2.7.0</version>
+    </dependency>
+  </dependencies>
+</project>

src/main/java/com/kasprr/resourcepackapi/DownloadManager.java

+package com.kasprr.resourcepackapi;
+
+public class DownloadManager {
+
+}

src/main/java/com/kasprr/resourcepackapi/ResourcePackAPI.java

+package com.kasprr.resourcepackapi;
+
+import org.bukkit.Bukkit;
+import org.bukkit.ChatColor;
+import org.bukkit.plugin.java.JavaPlugin;
+import java.io.*;
+import java.net.MalformedURLException;
+import java.nio.channels.Channels;
+import java.nio.channels.FileChannel;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Properties;
+import java.net.URL;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipInputStream;
+
+import static java.nio.file.StandardOpenOption.CREATE;
+import static java.nio.file.StandardOpenOption.WRITE;
+
+
+public final class ResourcePackAPI extends JavaPlugin {
+
+  @Override
+  public void onEnable() {
+    String packName = "serverpack";
+    URL packURL = getResourcePackUrl();
+    Path path2 = Paths.get(getDataFolder() + "/packs/" + packName);
+    System.out.println(packURL.getFile());
+    downloadAndUnzipResourcePack(packURL, path2);
+  }
+
+  public static boolean isUrlValid(String url) {
+    try {
+      new URL(url).toURI();
+      return true;
+    } catch (Exception e) {
+      return false;
+    }
+  }
+
+  public static URL getResourcePackUrl() {
+    BufferedReader reader;
+    Properties props = new Properties();
+    String packUrlString = null;
+
+    // Get resource pack URL from server.properties
+    try {
+      reader = new BufferedReader(new FileReader("server.properties"));
+      props.load(reader);
+      reader.close();
+      packUrlString = props.getProperty("resource-pack");
+    } catch (IOException e) {
+      e.printStackTrace();
+    }
+
+    // Validate and convert URL
+    URL packUrl = null;
+    if (isUrlValid(packUrlString) && packUrlString != null) {
+      try {
+        packUrl = new URL(packUrlString);
+        Bukkit.getConsoleSender().sendMessage(ChatColor.GREEN + "URL VALID");
+      } catch (MalformedURLException e) {
+        e.printStackTrace();
+      }
+    } else {
+      // TODO: probably throw some exception here?
+      Bukkit.getConsoleSender().sendMessage(ChatColor.DARK_RED + "URL INVALID");
+    }
+
+    return packUrl;
+  }
+
+//  public static void downloadResourcePack(URL url, File path) {
+//    try {
+//      ReadableByteChannel rbc = Channels.newChannel(url.openStream());
+//      FileOutputStream fileOS = new FileOutputStream(path);
+//      FileChannel writeChannel = fileOS.getChannel();
+//      writeChannel.transferFrom(rbc, 0, Long.MAX_VALUE);
+//    } catch (IOException e) {
+//      e.printStackTrace();
+//    }
+//  }
+
+  public static void downloadAndUnzipResourcePack(URL url, Path extractPath) {
+    try (ZipInputStream zipInputStream = new ZipInputStream(Channels.newInputStream(Channels.newChannel(url.openStream())))) {
+      if (!Files.exists(extractPath)) {
+        Files.createDirectory(extractPath);
+      }
+      for (ZipEntry entry = zipInputStream.getNextEntry(); entry != null; entry = zipInputStream.getNextEntry()) {
+        Path unzippedFilePath = extractPath.resolve(entry.getName());
+        if (entry.isDirectory()) {
+          Files.createDirectory(unzippedFilePath);
+        } else try (FileChannel fileChannel = FileChannel.open(unzippedFilePath, WRITE, CREATE)) {
+          fileChannel.transferFrom(Channels.newChannel(zipInputStream), 0, Long.MAX_VALUE);
+        }
+      }
+    } catch (IOException e) {
+      e.printStackTrace();
+    }
+  }
+
+}
\ No newline at end of file

src/main/resources/plugin.yml

+name: ResourcePackAPI
+version: ${project.version}
+main: com.kasprr.resourcepackapi.ResourcePackAPI
+api-version: 1.16
+authors: [ Kasprr ]