move CommandConverter to wrapper package

lib/src/main/java/net/tomatentum/marinara/wrapper/CommandConverter.java

@@ -0,0 +1,61 @@
+package net.tomatentum.marinara.wrapper;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import net.tomatentum.marinara.interaction.commands.SlashCommandDefinition;
+import net.tomatentum.marinara.interaction.commands.annotation.SlashCommandOption;
+import net.tomatentum.marinara.interaction.commands.annotation.SlashCommandOptionChoice;
+import net.tomatentum.marinara.interaction.ident.InteractionIdentifier;
+import net.tomatentum.marinara.interaction.ident.RootCommandIdentifier;
+import net.tomatentum.marinara.interaction.ident.SlashCommandIdentifier;
+
+public class CommandConverter<A extends Object, O extends Object, C extends Object> {
+
+    public static <A, O, C> CommandConverter<A, O, C> of(Spec<A, O, C> spec) {
+        return new CommandConverter<>(spec);
+    }
+
+    private Spec<A, O, C> spec;
+
+    CommandConverter(Spec<A, O, C> spec) {
+        this.spec = spec;
+    }
+    
+    public A convert(SlashCommandDefinition def) {
+        List<O> options = new ArrayList<>();
+        if (!def.isRootCommand()) {
+            Arrays.stream(def.getSubCommands()).map(this::convertSubCommand).forEach(options::add);
+            Arrays.stream(def.getSubCommandGroups()).map(x -> this.convertSubCommandGroup(def, x)).forEach(options::add);
+        }else
+            Arrays.stream(def.rootIdentifier().options()).map(this::convertOption).forEach(options::add);
+
+        return spec.convertCommand(def.rootIdentifier(), options);
+    }
+
+    private O convertSubCommandGroup(SlashCommandDefinition def, InteractionIdentifier identifier) {
+        SlashCommandIdentifier[] subCommands = def.getSubCommands(identifier.name());
+        List<O> convertedSubCommands = Arrays.stream(subCommands).map(this::convertSubCommand).toList();
+        return spec.convertSubCommandGroup(identifier, convertedSubCommands);
+    }
+
+    private O convertSubCommand(SlashCommandIdentifier identifier) {
+        List<O> options = Arrays.stream(identifier.options()).map(this::convertOption).toList();
+        return spec.convertSubCommand(identifier, options);
+    }
+
+    private O convertOption(SlashCommandOption option) {
+        List<C> choices = Arrays.stream(SlashCommandDefinition.getActualChoices(option)).map(spec::convertChoice).toList();
+        return spec.convertOption(option, choices);
+    }
+
+    public static interface Spec<A extends Object, O extends Object, C extends Object> {
+
+        public A convertCommand(RootCommandIdentifier rootIdentifier, List<O>  options);
+        public O convertSubCommandGroup(InteractionIdentifier identifier, List<O> subCommands);
+        public O convertSubCommand(InteractionIdentifier identifier, List<O>  options);
+        public O convertOption(SlashCommandOption option, List<C> choices);
+        public C convertChoice(SlashCommandOptionChoice choice);
+    }
+}