src/main/resources/mapper/xml/TorrentMapper.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.pt5.pthouduan.mapper.TorrentMapper">

    <!-- 按上传者查询 -->
    <select id="selectByUploaderId" resultType="com.pt5.pthouduan.entity.Torrent">
        SELECT * FROM torrent
        WHERE userid = #{uploaderId}
    </select>

    <!-- 按名称模糊搜索 -->
    <select id="searchByName" resultType="com.pt5.pthouduan.entity.Torrent">
        SELECT * FROM torrent
        WHERE torrent_title LIKE CONCAT('%', #{keyword}, '%')
    </select>

    <select id="searchByKeyword" resultType="com.pt5.pthouduan.entity.Torrent">
        SELECT * FROM torrent
        WHERE torrent_title LIKE CONCAT('%', #{keyword}, '%')
    </select>

    <!-- 获取热门种子 -->
    <select id="selectTopPopular" resultType="com.pt5.pthouduan.entity.Torrent">
        SELECT * FROM torrent
        ORDER BY download_count DESC
            LIMIT 10
    </select>

    <!-- 检查infoHash是否存在 -->
    <select id="existsByInfoHash" resultType="int" parameterType="string">
        SELECT COUNT(*) FROM torrent WHERE info_hash = #{infoHash}
    </select>


    <!-- 下载计数+1 -->
    <update id="incrementDownloadCount">
        UPDATE torrent
        SET download_count = download_count + 1
        WHERE torrentid = #{id}
    </update>

    <!-- 复杂查询示例（带动态SQL） -->
    <select id="selectByCondition" resultType="com.pt5.pthouduan.entity.Torrent">
        SELECT * FROM torrent
        <where>
            <if test="condition.categoryId != null">
                AND categoryid = #{condition.categoryId}
            </if>
            <if test="condition.minSize != null">
                AND torrent_size >= #{condition.minSize}
            </if>
        </where>
        ORDER BY ${condition.orderBy} DESC
    </select>

<!--    <select id="selectById" resultType="com.pt5.pthouduan.entity.Torrent">-->
<!--        SELECT-->
<!--            t.torrentid,-->
<!--            t.torrent_title,-->
<!--            t.description,-->
<!--            t.uploader_id,-->
<!--            t.upload_time,-->
<!--            t.download_count,-->
<!--            t.torrent_size,-->
<!--            t.filename,-->
<!--            t.path,-->
<!--            t.categoryid,-->
<!--            t.caption,-->
<!--            t.dpi-->
<!--        FROM torrent t-->
<!--        WHERE t.torrentid = #{torrentid}-->
<!--    </select>-->
    <select id="selectById" resultType="com.pt5.pthouduan.entity.Torrent">
        SELECT
            t.torrentid,
            t.torrent_title,
            t.description,
            t.uploader_id,
            t.upload_time,
            t.download_count,
            t.torrent_size,
            t.filename,
            t.path,
            t.categoryid,
            t.caption,
            t.dpi,
            t.last_seed,
            t.info_hash
        FROM torrent t
        WHERE t.torrentid = #{torrentid}
    </select>

    <select id="getAllTorrents" resultType="com.pt5.pthouduan.entity.Torrent">
        SELECT
            torrentid,
            torrent_title,
            filename,
            description,
            path,
            uploader_id,
            upload_time,
            download_count,
            categoryid,
            promotionid,
            dpi,
            caption
        FROM
            torrent
    </select>

    <insert id="save" parameterType="com.pt5.pthouduan.entity.Torrent"
            useGeneratedKeys="true" keyProperty="torrentid" keyColumn="torrentid">
        INSERT INTO torrent (
            uploader_id,
            promotionid,
            categoryid,
            info_hash,
            torrent_title,
            dpi,
            caption,
            torrent_size,
            upload_time,
            download_count,
            description,
            path,
            filename
        ) VALUES (
                     #{uploaderid},
                     #{promotionid},
                     #{categoryid},
                     #{infohash},
                     #{torrenttitle},
                     #{dpi},
                     #{caption},
                     #{torrentsize},
                     #{uploadtime},
                     #{downloadCount},
                     #{description},
                     #{path},
                     #{filename}
                 )
    </insert>
    <!-- 按分类查询种子 -->
    <select id="selectTorrentsByCategory" resultType="com.pt5.pthouduan.entity.Torrent">
        SELECT * FROM torrent WHERE categoryid = #{category}
    </select>

    <!-- 免费下载 -->
    <update id="setFreePromotion">
            <![CDATA[
        UPDATE torrent t
        LEFT JOIN (
            SELECT info_hash, MAX(last_updated) AS last_time
            FROM peer_stats
            GROUP BY info_hash
        ) ps ON t.info_hash = ps.info_hash
        SET t.promotionid = 3
        WHERE ps.last_time IS NULL OR ps.last_time < NOW() - INTERVAL 7 DAY
        ]]>
    </update>


    <!-- 上传加倍 -->
    <update id="setDoubleUpload">
            <![CDATA[
        UPDATE torrent t
        LEFT JOIN (
            SELECT info_hash, MAX(last_updated) AS last_time,
                   SUM(delta_upload) AS total_upload
            FROM peer_stats
            GROUP BY info_hash
        ) ps ON t.info_hash = ps.info_hash
        SET t.promotionid = 1
        WHERE ps.last_time < NOW() - INTERVAL 5 DAY
          AND (ps.total_upload IS NULL OR ps.total_upload = 0)
        ]]>
    </update>


    <!-- 下载减半 -->
    <update id="setHalfDownload">
            <![CDATA[
        UPDATE torrent t
        LEFT JOIN (
            SELECT info_hash, MAX(last_updated) AS last_time,
                   SUM(delta_download) AS total_download
            FROM peer_stats
            GROUP BY info_hash
        ) ps ON t.info_hash = ps.info_hash
        SET t.promotionid = 2
        WHERE ps.last_time < NOW() - INTERVAL 5 DAY
          AND (ps.total_download IS NULL OR ps.total_download = 0)
        ]]>
    </update>


    <!-- 取消促销 -->
    <update id="clearPromotion">
            <![CDATA[
        UPDATE torrent t
        LEFT JOIN (
            SELECT info_hash, MAX(last_updated) AS last_time
            FROM peer_stats
            GROUP BY info_hash
        ) ps ON t.info_hash = ps.info_hash
        SET t.promotionid = NULL
        WHERE ps.last_time >= NOW() - INTERVAL 3 DAY
        ]]>
    </update>

    <select id="listByCategoryWithFilters" resultType="com.pt5.pthouduan.entity.Torrent">
        SELECT * FROM torrent t
        WHERE t.categoryid = #{categoryid}
        <if test="filters != null and !filters.isEmpty()">
            AND t.torrentid IN (
            SELECT e.torrentid FROM
            ${extendTable} e
            WHERE
            <foreach collection="filters" index="key" item="value" separator=" AND ">
                (e.${key} = #{value})
            </foreach>
            )
        </if>
    </select>

</mapper>