juick-commands/src/main/java/com/juick/command/ShowFavorites.java


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package com.juick.command;

import com.juick.User;
import com.juick.formatters.PlainTextFormatter;
import com.juick.service.MessagesService;
import lombok.Getter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.Collections;
import java.util.List;
import java.util.regex.Pattern;
import java.util.stream.Collectors;

/**
 * @author ma1uta
 */
@Component
@Getter
public class ShowFavorites implements Command {

    private static final Pattern PATTERN = Pattern.compile("!", Pattern.CASE_INSENSITIVE);

    private final MessagesService messagesService;

    @Autowired
    public ShowFavorites(MessagesService messagesService) {
        this.messagesService = messagesService;
    }

    @Override
    public Pattern pattern() {
        return PATTERN;
    }

    @Override
    public String help() {
        return "! - Show your favorite messages";
    }

    @Override
    public String execute(User sender, MessageListener protocolListener, String command) {
        List<Integer> mids = getMessagesService().getUserRecommendations(sender.getUid(), 0);
        if (mids.size() > 0) {
            List<com.juick.Message> messages = getMessagesService().getMessages(mids);
            return "Favorite messages: \n" + String.join("\n", messages.stream()
                .sorted(Collections.reverseOrder())
                .map(PlainTextFormatter::formatPost)
                .collect(Collectors.toList()));
        }
        return "No favorite messages, try to \"like\" something ;)";
    }
}