Splits the blacksmith command into two commands, and much more

src/main/java/net/knarcraft/blacksmith/command/BlackSmithConfigTabCompleter.java

@@ -0,0 +1,64 @@
+package net.knarcraft.blacksmith.command;
+
+import net.knarcraft.blacksmith.config.GlobalSetting;
+import net.knarcraft.blacksmith.config.NPCSetting;
+import net.knarcraft.blacksmith.util.TabCompleteValuesHelper;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.TabCompleter;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * The tab completer for the command used for changing global configuration options
+ */
+public class BlackSmithConfigTabCompleter implements TabCompleter {
+
+    @Nullable
+    @Override
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label,
+                                      @NotNull String[] args) {
+        if (args.length == 1) {
+            if (!sender.hasPermission("blacksmith.admin")) {
+                return new ArrayList<>();
+            }
+
+            List<String> availableCommands = new ArrayList<>();
+            availableCommands.add("reload");
+            for (NPCSetting setting : NPCSetting.values()) {
+                availableCommands.add(setting.getCommandName());
+            }
+            for (GlobalSetting globalSetting : GlobalSetting.values()) {
+                availableCommands.add(globalSetting.getCommandName());
+            }
+            return availableCommands;
+        } else if (args.length == 2) {
+            return tabCompleteCommandValues(args[0]);
+        }
+        return null;
+    }
+
+    /**
+     * Tab completes the values available for the given command
+     *
+     * @param commandName <p>The name of the used command</p>
+     * @return <p>Some valid options for the command's argument</p>
+     */
+    private List<String> tabCompleteCommandValues(String commandName) {
+        for (GlobalSetting globalSetting : GlobalSetting.values()) {
+            if (globalSetting.getCommandName().equalsIgnoreCase(commandName)) {
+                return TabCompleteValuesHelper.getTabCompletions(globalSetting.getValueType());
+            }
+        }
+        for (NPCSetting npcSetting : NPCSetting.values()) {
+            if (npcSetting.getCommandName().equalsIgnoreCase(commandName)) {
+                return TabCompleteValuesHelper.getTabCompletions(npcSetting.getValueType());
+            }
+        }
+        return null;
+    }
+
+}