[+] Create controller to execute commands

Author: hykilpikonna

src/main/java/org/hydev/mcpm/Controller.java

@@ -0,0 +1,80 @@
+package org.hydev.mcpm;
+
+import net.sourceforge.argparse4j.inf.ArgumentParserException;
+import org.hydev.mcpm.client.injector.*;
+
+import java.util.function.Consumer;
+
+import static java.lang.String.format;
+import static org.hydev.mcpm.utils.Sugar.sub;
+import static org.hydev.mcpm.utils.Sugar.subFrom;
+
+
+/**
+ * Controller of the program
+ *
+ * @author Azalea (https://github.com/hykilpikonna)
+ * @since 2022-10-30
+ */
+public class Controller
+{
+    private final LoadBoundary loader;
+    private final UnloadBoundary unloader;
+    private final ReloadBoundary reloader;
+
+    public Controller()
+    {
+        var pl = new PluginLoader();
+        loader = pl;
+        unloader = pl;
+        reloader = pl;
+    }
+
+    /**
+     * Run a command
+     *
+     * @param args Command-line arguments (not including the command name/path)
+     * @param log Callback logger
+     */
+    public void runCommand(String[] args, Consumer<String> log)
+    {
+        if (args.length == 0) return;
+
+        var cmd = args[0].toLowerCase();
+        switch (cmd)
+        {
+            case "load", "unload", "reload" ->
+            {
+                try
+                {
+                    var a = ArgsParser.LOADER.parseArgs(subFrom(args, 1));
+                    var name = a.getString("name");
+
+                    try
+                    {
+                        switch (cmd)
+                        {
+                            case "load" -> loader.loadPlugin(name);
+                            case "unload" -> unloader.unloadPlugin(name);
+                            case "reload" -> reloader.reloadPlugin(name);
+                        }
+                        log.accept(format("Plugin %s %sed", name, cmd));
+                    }
+                    catch (PluginNotFoundException e)
+                    {
+                        log.accept(format("Plugin %s not found", name));
+                    }
+                }
+                catch (ArgumentParserException e)
+                {
+                    log.accept("Error: " + e.getMessage());
+                    log.accept(ArgsParser.LOADER.formatHelp());
+                }
+            }
+            default ->
+            {
+                log.accept("Usage: /mcpm <install/uninstall/update/search/load/unload/reload/help>");
+            }
+        }
+    }
+}