Class MomentService

src/service/moment.service.js:11–88

// `

class MomentService {
  async create(userId, content) {
    const statement = `INSERT INTO moment (content, user_id) VALUES (?, ?);`;
    const [result] = await connection.execute(statement, [content, userId]);
    return result;
  }

  async getMomentById(id) {
    const statement = `
      SELECT 
        m.id id, m.content content, m.createAt createTime, m.updateAt updateTime,
        JSON_OBJECT('id', u.id, 'name', u.name, 'avatarUrl', u.avatar_url) author,
        IF(COUNT(l.id),JSON_ARRAYAGG(
          JSON_OBJECT('id', l.id, 'name', l.name)
        ),NULL) labels,
        (SELECT IF(COUNT(c.id),JSON_ARRAYAGG(
          JSON_OBJECT('id', c.id, 'content', c.content, 'commentId', c.comment_id, 'createTime', c.createAt,
                      'user', JSON_OBJECT('id', cu.id, 'name', cu.name, 'avatarUrl', cu.avatar_url))
        ),NULL) FROM comment c LEFT JOIN user cu ON c.user_id = cu.id WHERE m.id = c.moment_id) comments,
        (SELECT JSON_ARRAYAGG(CONCAT('http://localhost:8000/moment/images/', file.filename)) 
        FROM file WHERE m.id = file.moment_id) images
      FROM moment m
      LEFT JOIN user u ON m.user_id = u.id
      LEFT JOIN moment_label ml ON m.id = ml.moment_id
      LEFT JOIN label l ON ml.label_id = l.id
      WHERE m.id = ?
      GROUP BY m.id;  
    `;
    try {
      const [result] = await connection.execute(statement, [id]);
      return result[0];
    } catch (error) {
      console.log(error)
    }
  }

  async getMomentList(offset, size) {
    const statement = `
      SELECT 
        m.id id, m.content content, m.createAt createTime, m.updateAt updateTime,
        JSON_OBJECT('id', u.id, 'name', u.name) author,
        (SELECT COUNT(*) FROM comment c WHERE c.moment_id = m.id) commentCount,
        (SELECT COUNT(*) FROM moment_label ml WHERE ml.moment_id = m.id) labelCount,
        (SELECT JSON_ARRAYAGG(CONCAT('http://localhost:8000/moment/images/', file.filename)) 
        FROM file WHERE m.id = file.moment_id) images
      FROM moment m
      LEFT JOIN user u ON m.user_id = u.id
      LIMIT ?, ?;
    `;

    const [result] = await connection.execute(statement, [offset, size]);
    return result;
  }

  async update(content, momentId) {
    const statement = `UPDATE moment SET content = ? WHERE id = ?;`;
    const [result] = await connection.execute(statement, [content, momentId]);
    return result;