<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
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"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
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<mapper namespace="com.tcm.training.admin.live.mapper.LiveCourseMapper">
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<!-- 课程分页列表（动态筛选） -->
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<select id="selectCoursePage"
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resultType="com.tcm.training.admin.live.vo.LiveCourseListRow">
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SELECT
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c.id, c.title, c.level, c.expert_id AS expertId,
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e.name AS expertName,
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e.avatar AS expertAvatar,
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c.cover_img AS coverImg,
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COALESCE(ss.reserve_count, 0) AS reserveCount,
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COALESCE(ss.watch_count, 0) AS watchCount,
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c.quiz_points AS quizPoints,
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ls.start_time AS startTime,
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COALESCE(ls.live_status, 0) AS liveStatus,
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c.status, c.created_at AS createdAt
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FROM tcm_live_course c
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LEFT JOIN tcm_expert e ON e.id = c.expert_id AND e.deleted = 0
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LEFT JOIN (
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SELECT live_course_id,
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SUM(base_reserve_count + real_reserve_count) AS reserve_count,
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SUM(base_watch_count + real_watch_count) AS watch_count
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FROM tcm_live_session
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WHERE deleted = 0
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GROUP BY live_course_id
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) ss ON ss.live_course_id = c.id
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LEFT JOIN (
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SELECT t1.live_course_id, t1.start_time, t1.video_url, t1.live_status
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FROM tcm_live_session t1
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JOIN (
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SELECT live_course_id, MAX(start_time) AS max_start
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FROM tcm_live_session
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WHERE deleted = 0 AND start_time IS NOT NULL
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GROUP BY live_course_id
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) m1 ON m1.live_course_id = t1.live_course_id AND m1.max_start = t1.start_time
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JOIN (
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SELECT live_course_id, start_time, MAX(id) AS max_id
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FROM tcm_live_session
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WHERE deleted = 0 AND start_time IS NOT NULL
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GROUP BY live_course_id, start_time
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) m2 ON m2.live_course_id = t1.live_course_id
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AND m2.start_time = t1.start_time
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AND m2.max_id = t1.id
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WHERE t1.deleted = 0
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) ls ON ls.live_course_id = c.id
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WHERE c.deleted = 0
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<if test="keyword != null and keyword.trim() != ''">
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AND c.title LIKE CONCAT('%', #{keyword}, '%')
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</if>
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<if test="expertId != null">
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AND c.expert_id = #{expertId}
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</if>
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<if test="status != null">
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AND c.status = #{status}
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</if>
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<if test="liveStatus != null">
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AND COALESCE(ls.live_status, 0) = #{liveStatus}
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</if>
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ORDER BY c.id DESC
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</select>
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<!-- 课程详情 -->
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<select id="selectCourseDetail"
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resultType="com.tcm.training.admin.live.vo.LiveCourseDetailRow">
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SELECT
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c.id, c.title, c.level, c.expert_id AS expertId,
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e.name AS expertName,
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e.avatar AS expertAvatar,
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c.cover_img AS coverImg, c.banner_imgs AS bannerImgs,
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c.intro, c.target_users AS targetUsers,
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c.quiz_delay_minutes AS quizDelayMinutes,
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c.quiz_points AS quizPoints,
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ls.start_time AS startTime,
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ls.video_url AS videoUrl,
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COALESCE(ls.live_status, 0) AS liveStatus,
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c.status,
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COALESCE(ss.reserve_count, 0) AS reserveCount,
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COALESCE(ss.watch_count, 0) AS watchCount,
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c.created_at AS createdAt, c.updated_at AS updatedAt
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FROM tcm_live_course c
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LEFT JOIN tcm_expert e ON e.id = c.expert_id AND e.deleted = 0
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LEFT JOIN (
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SELECT live_course_id,
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SUM(base_reserve_count + real_reserve_count) AS reserve_count,
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SUM(base_watch_count + real_watch_count) AS watch_count
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FROM tcm_live_session
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WHERE deleted = 0
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GROUP BY live_course_id
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) ss ON ss.live_course_id = c.id
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LEFT JOIN (
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SELECT t1.live_course_id, t1.start_time, t1.video_url, t1.live_status
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FROM tcm_live_session t1
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JOIN (
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SELECT live_course_id, MAX(start_time) AS max_start
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FROM tcm_live_session
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WHERE deleted = 0 AND start_time IS NOT NULL
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GROUP BY live_course_id
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) m1 ON m1.live_course_id = t1.live_course_id AND m1.max_start = t1.start_time
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JOIN (
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SELECT live_course_id, start_time, MAX(id) AS max_id
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FROM tcm_live_session
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WHERE deleted = 0 AND start_time IS NOT NULL
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GROUP BY live_course_id, start_time
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) m2 ON m2.live_course_id = t1.live_course_id
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AND m2.start_time = t1.start_time
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AND m2.max_id = t1.id
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WHERE t1.deleted = 0
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) ls ON ls.live_course_id = c.id
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WHERE c.deleted = 0 AND c.id = #{id}
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</select>
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</mapper>
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