Test: Plugin

Author: emyfops

build.gradle.kts

@@ -98,9 +98,7 @@ allprojects {
     }
 
     java {
-        // Uncomment these lines when the plugin system is ready
-        // withSourcesJar()
-        // withJavadocJar()
+        withSourcesJar()
 
         sourceCompatibility = JavaVersion.VERSION_17
         targetCompatibility = JavaVersion.VERSION_17

common/src/main/kotlin/com/lambda/core/Loader.kt

@@ -8,11 +8,13 @@ import com.lambda.gui.impl.clickgui.GuiConfigurable
 import com.lambda.interaction.PlayerPacketManager
 import com.lambda.interaction.RotationManager
 import com.lambda.module.ModuleRegistry
+import com.lambda.plugin.PluginRegistry
 import com.lambda.util.Communication.ascii
 import kotlin.system.measureTimeMillis
 
 object Loader {
     private val loadables = listOf(
+        PluginRegistry,
         ModuleRegistry,
         CommandManager,
         RotationManager,

common/src/main/kotlin/com/lambda/plugin/PluginRegistry.kt

@@ -0,0 +1,40 @@
+package com.lambda.plugin
+
+import com.lambda.Lambda
+import com.lambda.Lambda.LOG
+import com.lambda.core.Loadable
+import com.lambda.plugin.api.Plugin
+import com.lambda.util.Communication.warn
+import com.lambda.util.FolderRegister.createIfNotExists
+import com.lambda.util.FolderRegister.listRecursive
+import com.lambda.util.FolderRegister.plugins
+import java.io.File
+import java.net.URLClassLoader
+import java.util.jar.JarFile
+
+object PluginRegistry : Loadable {
+    private fun loadPlugin(file: File) {
+        val loader = URLClassLoader(arrayOf(file.toURI().toURL()))
+        val manifest = JarFile(file).manifest
+        val mainClass = manifest.mainAttributes.getValue("Main-Class")
+
+        val clazz = loader.loadClass(mainClass)
+        val isObject = clazz.declaredFields.any { it.name == "INSTANCE" }
+        val instance = if (isObject) clazz.getDeclaredField("INSTANCE").get(null)
+        else clazz.getDeclaredConstructor().newInstance()
+
+        if (instance is Plugin) instance.load()
+        else LOG.warn("Plugin $file is not a valid plugin")
+    }
+
+    override fun load(): String {
+        plugins.createIfNotExists()
+
+        val plugins = plugins.listRecursive()
+        plugins.forEach { file ->
+            loadPlugin(file)
+        }
+
+        return "Loaded ${plugins.count()} plugins"
+    }
+}

common/src/main/kotlin/com/lambda/plugin/api/Plugin.kt

@@ -0,0 +1,16 @@
+package com.lambda.plugin.api
+
+import com.lambda.util.Nameable
+
+abstract class Plugin(
+    override val name: String,
+    val description: String,
+    val version: String,
+    val author: List<String>,
+    val dependencies: List<String>? = null,
+    val softDependencies: List<String>? = null,
+    val loadBefore: List<String>? = null,
+    val loadAfter: List<String>? = null,
+) : Nameable {
+    abstract fun load()
+}

common/src/main/kotlin/com/lambda/util/FolderRegister.kt

@@ -21,6 +21,7 @@ object FolderRegister {
     val config: File = File(lambda, "config")
     val packetLogs: File = File(lambda, "packet-log")
     val replay: File = File(lambda, "replay")
+    val plugins: File = File(lambda, "plugins")
 
     fun File.createIfNotExists() {
         if (!exists()) { mkdirs() }