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/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package com.juick.server;

import com.juick.Tag;
import com.juick.User;
import com.juick.server.helpers.NotifyOpts;
import org.springframework.dao.EmptyResultDataAccessException;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.util.StringUtils;

import java.util.*;
import java.util.stream.Collectors;

/**
 *
 * @author ugnich
 */
public class SubscriptionsQueries {

    public static List<String> getJIDSubscribedToUser(JdbcTemplate sql, int uid, boolean friendsonly) {
        if (friendsonly == false) {
            return sql.queryForList("SELECT jids.jid FROM subscr_users INNER JOIN jids " +
                            "ON (subscr_users.user_id=? AND subscr_users.suser_id=jids.user_id) WHERE jids.active=1",
                    String.class, uid);
        } else {
            return sql.queryForList("SELECT jids.jid FROM subscr_users INNER JOIN jids " +
                    "ON (subscr_users.user_id=? AND subscr_users.suser_id=jids.user_id) WHERE jids.active=1 " +
                    "AND jids.user_id IN (SELECT wl_user_id FROM wl_users WHERE user_id=?)", String.class, uid, uid);
        }
    }

    public static List<User> getSubscribedUsers(JdbcTemplate sql, int uid, int mid) {
        User author = MessagesQueries.getMessageAuthor(sql, mid);
        List<User> userids = UserQueries.getUserReaders(sql, uid);
        Set<Integer> set = new HashSet<>();
        set.addAll(userids.stream().map(User::getUid).collect(Collectors.toList()));
        List<Integer> tags = MessagesQueries.getMessageTagsIDs(sql, mid);
        if (tags.size() > 0) {
            List<Integer> tagUsers = sql.queryForList("SELECT suser_id FROM subscr_tags " +
                    "WHERE tag_id IN (" + StringUtils.arrayToCommaDelimitedString(tags.toArray()) + ") AND suser_id!=? " +
                    " AND suser_id NOT IN (SELECT user_id FROM bl_users WHERE bl_user_id=?)", Integer.class, uid, author.getUid());
            set.addAll(tagUsers);
        }
        return UserQueries.getUsersByID(sql, new ArrayList<>(set));
    }

    public static List<User> getUsersSubscribedToComments(JdbcTemplate sql, int mid, int ignore_uid) {
        List<Integer> userids = sql.queryForList("SELECT suser_id FROM subscr_messages WHERE message_id=? AND suser_id!=?",
                Integer.class, mid, ignore_uid);
        if (userids.size() > 0) {
            return UserQueries.getUsersByID(sql, userids);
        } else {
            return Collections.emptyList();
        }
    }

    public static List<User> getUsersSubscribedToUserRecommendations(JdbcTemplate sql, int uid, int mid, int muid) {
        List<Integer> tags = MessagesQueries.getMessageTagsIDs(sql, mid);

            String query = "SELECT suser_id FROM subscr_users WHERE user_id=" + uid;
            query += " AND user_id NOT IN (SELECT user_id FROM bl_users WHERE bl_user_id=" + muid + ")";
            query += " AND user_id NOT IN (SELECT suser_id FROM subscr_users WHERE user_id=" + muid + ")";
            query += " AND user_id NOT IN (SELECT suser_id FROM subscr_messages WHERE message_id=" + mid + ")";
            query += " AND user_id NOT IN (SELECT user_id FROM favorites WHERE message_id=" + mid + ")";
            query += " AND user_id NOT IN (SELECT subscr_users.suser_id FROM subscr_users INNER JOIN favorites ON (favorites.message_id=" + mid + " AND subscr_users.user_id=favorites.user_id AND favorites.user_id!=" + uid + "))";
            if (!tags.isEmpty()) {
                String tagsStr = StringUtils.arrayToCommaDelimitedString(tags.toArray());
                query += " AND user_id NOT IN (SELECT suser_id FROM subscr_tags WHERE tag_id IN (" + tagsStr + "))";
                query += " AND user_id NOT IN (SELECT user_id FROM bl_tags WHERE tag_id IN (" + tagsStr + "))";
            }
        List<Integer> userids = sql.queryForList(query, Integer.class);
        return UserQueries.getUsersByID(sql, userids);
    }

    public static boolean subscribeMessage(JdbcTemplate sql, int mid, int vuid) {
        return sql.update("INSERT IGNORE INTO subscr_messages(suser_id,message_id) VALUES (" + vuid + "," + mid + ")") == 1;
    }
    public static boolean unSubscribeMessage(JdbcTemplate sql, int mid, int vuid) {
        return sql.update("DELETE FROM subscr_messages WHERE message_id=? AND suser_id=?",
                mid, vuid) > 0;
    }
    public static boolean subscribeUser(JdbcTemplate sql, User user, User toUser) {
        return sql.update("INSERT IGNORE INTO subscr_users(user_id,suser_id) VALUES (?,?)",
                toUser.getUid(), user.getUid()) == 1;
    }
    public static boolean unSubscribeUser(JdbcTemplate sql, User user, User fromUser) {
        return sql.update("DELETE FROM subscr_users WHERE suser_id=? AND user_id=?",
                user.getUid(), fromUser.getUid()) > 0;
    }
    public static boolean subscribeTag(JdbcTemplate sql, User user, Tag toTag) {
        return sql.update("INSERT IGNORE INTO subscr_tags(tag_id,suser_id) VALUES (?,?)",
                toTag.TID, user.getUid()) == 1;
    }
    public static boolean unSubscribeTag(JdbcTemplate sql, User user, Tag toTag) {
        return sql.update("DELETE FROM subscr_tags WHERE tag_id=? AND suser_id=?",
                toTag.TID, user.getUid()) > 0;
    }

    public static NotifyOpts getNotifyOptions(JdbcTemplate sql, User user) {
        try {
            return sql.queryForObject("SELECT jnotify,subscr_notify,recommendations FROM useroptions WHERE user_id=?",
                    (rs, num) -> {
                        NotifyOpts options = new NotifyOpts();
                        options.setRepliesEnabled(rs.getInt(1) > 0);
                        options.setSubscriptionsEnabled(rs.getInt(2) > 0);
                        options.setRecommendationsEnabled(rs.getInt(3) > 0);
                        return options;
                    }, user.getUid());
        } catch (EmptyResultDataAccessException e) {
            return new NotifyOpts();
        }
    }

    public static boolean setNotifyOptions(JdbcTemplate sql, User user, NotifyOpts options) {
        return sql.update("UPDATE useroptions SET jnotify=? WHERE user_id=?", options.isRepliesEnabled() ? 1 : 0,
                user.getUid()) > 0 &&
                sql.update("UPDATE useroptions SET subscr_notify=? WHERE user_id=?", options.isSubscriptionsEnabled() ? 1 : 0,
                        user.getUid()) > 0 &&
                sql.update("UPDATE useroptions SET recommendations=? WHERE user_id=?", options.isRecommendationsEnabled() ? 1 : 0,
                        user.getUid()) > 0;
    }
}