Implement quests

src/main/java/emu/grasscutter/command/commands/QuestCommand.java

@@ -0,0 +1,66 @@
+package emu.grasscutter.command.commands;
+
+import emu.grasscutter.Grasscutter;
+import emu.grasscutter.command.Command;
+import emu.grasscutter.command.CommandHandler;
+import emu.grasscutter.game.player.Player;
+import emu.grasscutter.game.quest.GameQuest;
+
+import java.util.List;
+
+import static emu.grasscutter.utils.Language.translate;
+
+@Command(label = "quest", usage = "quest <add|finish> [quest id]", permission = "player.quest", permissionTargeted = "player.quest.others", description = "commands.quest.description")
+public final class QuestCommand implements CommandHandler {
+
+    @Override
+    public void execute(Player sender, Player targetPlayer, List<String> args) {
+		if (targetPlayer == null) {
+			CommandHandler.sendMessage(sender, translate(sender, "commands.execution.need_target"));
+			return;
+		}
+		
+		if (args.size() != 2) {
+			CommandHandler.sendMessage(sender, translate(sender, "commands.quest.usage"));
+            return;
+		}
+		
+		String cmd = args.get(0).toLowerCase();
+		int questId;
+		
+		try {
+			questId = Integer.parseInt(args.get(1));
+		} catch (Exception e) {
+			CommandHandler.sendMessage(sender, translate(sender, "commands.quest.invalid_id"));
+            return;
+		}
+		
+		switch (cmd) {
+			case "add" -> {
+				GameQuest quest = sender.getQuestManager().addQuest(questId);
+				
+				if (quest != null) {
+					CommandHandler.sendMessage(sender, translate(sender, "commands.quest.added", questId));
+					return;
+				}
+				
+				CommandHandler.sendMessage(sender, translate(sender, "commands.quest.not_found"));
+			}
+			case "finish" -> {
+				GameQuest quest = sender.getQuestManager().getQuestById(questId);
+				
+				if (quest == null) {
+					CommandHandler.sendMessage(sender, translate(sender, "commands.quest.not_found"));
+					return;
+				}
+				
+				quest.finish();
+				
+				CommandHandler.sendMessage(sender, translate(sender, "commands.quest.finished", questId));
+			}
+			default -> {
+				CommandHandler.sendMessage(sender, translate(sender, "commands.quest.usage"));
+			}
+		}
+    }
+}