added module loading

src/main/java/org/hmcore/HMCore.java

@@ -1,6 +1,7 @@
 package org.hmcore;
 
 import org.hmcore.modules.Module;
+import org.hmcore.modules.ModuleLoader;
 import org.hmcore.modules.ModuleManager;
 import org.hmcore.modules.RegistryModule;
 

src/main/java/org/hmcore/modules/ModuleLoader.java

@@ -0,0 +1,58 @@
+package org.hmcore.modules;
+
+import com.google.gson.GsonBuilder;
+import org.hmcore.HMCore;
+import org.hmcore.registration.config.ModuleReadable;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.lang.reflect.InvocationTargetException;
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.util.Objects;
+import java.util.Scanner;
+import java.util.jar.JarEntry;
+import java.util.jar.JarFile;
+
+public class ModuleLoader {
+
+    void loadModules() throws IOException, ClassNotFoundException, InvocationTargetException, NoSuchMethodException, InstantiationException, IllegalAccessException {
+        File moduleDir = new File("hm/modules");
+        if(!moduleDir.exists()) moduleDir.mkdirs();
+        for (String path:
+                Objects.requireNonNull(moduleDir.list())) {
+            loadModule(path);
+        }
+    }
+
+    private void loadModule(String path) throws IOException, ClassNotFoundException, NoSuchMethodException, InstantiationException, IllegalAccessException, InvocationTargetException {
+        System.out.println("Loading module at: " + path);
+        JarFile jarFile = new JarFile(path);
+        JarEntry jarEntry = jarFile.getJarEntry("module.json");
+        String content = getClassPath(jarFile.getInputStream(jarEntry));
+        jarFile.close();
+        ModuleReadable readable = new GsonBuilder().create().fromJson(content, ModuleReadable.class);
+        URLClassLoader child = new URLClassLoader(
+                new URL[] {new File(path).toURI().toURL()},
+                this.getClass().getClassLoader()
+        );
+        Class<?> classToLoad = Class.forName(readable.getClassPath(), true, child);
+        Module instance = (Module) classToLoad.getDeclaredConstructor().newInstance();
+        HMCore.modules.put(instance.getName(), instance);
+        System.out.println("Loaded " + instance.getName() + " v" + readable.getVersion() + " by " + readable.getCreator());
+    }
+
+    private String getClassPath(InputStream jarEntry) {
+        StringBuilder builder = new StringBuilder();
+
+        Scanner myReader = new Scanner(jarEntry);
+        while (myReader.hasNextLine()) {
+            builder.append(myReader.nextLine());
+        }
+        myReader.close();
+
+        return builder.toString();
+    }
+
+}

src/main/java/org/hmcore/modules/ModuleManager.java

@@ -4,6 +4,9 @@ import org.hmcore.HMCore;
 import org.hmcore.api.ModuleState;
 import org.hmcore.api.exceptions.ModuleErroredException;
 
+import java.io.IOException;
+import java.lang.reflect.InvocationTargetException;
+
 public class ModuleManager {
 
     static ModuleState overallState = ModuleState.QUEUED;
@@ -11,7 +14,11 @@ public class ModuleManager {
     public static void loadModules() {
         if(overallState != ModuleState.QUEUED) return;
 
-        //TODO: LOAD MODULES HERE LATER
+        try {
+            new ModuleLoader().loadModules();
+        } catch (IOException | ClassNotFoundException | InvocationTargetException | NoSuchMethodException | InstantiationException | IllegalAccessException e) {
+            e.printStackTrace();
+        }
 
         overallState = ModuleState.LOADED;
 

src/main/java/org/hmcore/registration/config/ModuleReadable.java

@@ -0,0 +1,26 @@
+package org.hmcore.registration.config;
+
+public class ModuleReadable {
+
+    final String classPath;
+    final String version;
+    final String creator;
+
+    public ModuleReadable(String classPath, String version, String creator) {
+        this.classPath = classPath;
+        this.version = version;
+        this.creator = creator;
+    }
+
+    public String getClassPath() {
+        return classPath;
+    }
+
+    public String getVersion() {
+        return version;
+    }
+
+    public String getCreator() {
+        return creator;
+    }
+}