Java/W9/command/DeleteCommand.java

package com.example.datacollect.command;
import com.example.datacollect.model.Article;
import com.example.datacollect.model.DataService;
import com.example.datacollect.view.ConsoleView;
import java.util.ArrayList;
import java.util.List;

public class DeleteCommand implements Command{
    private final ConsoleView view;
    public DeleteCommand(ConsoleView view){
        this.view=view;
    }
    @Override
    public String getName(){
        return "delete";
    }
    @Override
    public void execute(String[]args,DataService dataService){
        if (args.length < 2) {
            view.printError("Usage: delete <index>");
            return;
        }
        int index;
        try{
            index = Integer.parseInt(args[1]) - 1;
        }catch (NumberFormatException e){
            view.printError("index must be number");
            return;
        }
        List<Article> articles = dataService.getAllArticles();
        if (index < 0 || index >= articles.size()) {
            view.printError("invalid index " + articles.size() + "article");
            return;
        }
        Article deleted=articles.remove(index);
        view.printSuccess("delete:" + deleted.getTitle());
    }
}