webp/models/mysql.go

package models

import (
	"database/sql"
	"errors"
	"fmt"
	"log"
	"strconv"
	"strings"
	"time"

	_ "github.com/go-sql-driver/mysql"
)

type MysqlConnection struct {
	Database *sql.DB
}

var connection *sql.DB

// 初始化数据库连接
func (m *MysqlConnection) Init() (err error) {
	user := Viper.Get("mysql.user").(string)
	password := Viper.Get("mysql.password").(string)
	host := Viper.Get("mysql.host").(string)
	port := Viper.Get("mysql.port").(int)
	database := Viper.Get("mysql.database").(string)
	sqlconf := user + ":" + password + "@tcp(" + host + ":" + strconv.Itoa(port) + ")/" + database + "?charset=utf8mb4&parseTime=True&loc=Local"
	connection, err = sql.Open("mysql", sqlconf) // 连接数据库
	if err != nil {
		log.Println("连接数据库失败", err)
		return
	}
	m.Database = connection
	return
}

// 根据图片 id 获取图片的 content
func (m *MysqlConnection) GetImageContent(group string, id string) (content string, err error) {
	switch group {
	case "video":
		err = m.Database.QueryRow("SELECT image FROM web_sort_video WHERE id=" + id).Scan(&content)
	case "article":
		err = m.Database.QueryRow("SELECT image FROM web_article WHERE id=" + id).Scan(&content)
	case "article_attribute":
		err = m.Database.QueryRow("SELECT image FROM web_article_attribute WHERE id=" + id).Scan(&content)
	case "ad":
		err = m.Database.QueryRow("SELECT image FROM web_ad WHERE id=" + id).Scan(&content)
	case "avatar":
		err = m.Database.QueryRow("SELECT avatar FROM web_member WHERE id=" + id).Scan(&content)
	case "image":
		err = m.Database.QueryRow("SELECT content FROM web_images WHERE id=" + id).Scan(&content)
	default:
		err = errors.New("group 参数错误")
	}
	return content, err
}

// 获取图片列表
func (m *MysqlConnection) GetImages(page int, size int) (images []byte, err error) {
	rows, err := m.Database.Query("SELECT id, group, content FROM web_images LIMIT ?, ?", (page-1)*size, size)
	if err != nil {
		log.Println("获取图片列表失败", err)
		return
	}
	defer rows.Close()

	images = []byte("[")
	for rows.Next() {
		var id int
		var group string
		var content string
		err = rows.Scan(&id, &group, &content)
		if err != nil {
			log.Println("获取图片列表失败", err)
			return
		}
		images = append(images, []byte("{\"id\":"+strconv.Itoa(id)+",\"group\":\""+group+"\",\"content\":\""+content+"\"},")...)
	}
	images = images[:len(images)-1]
	images = append(images, []byte("]")...)
	return
}

type User struct {
	Id         int       `json:"id"`
	UserName   string    `json:"user_name"`
	Avatar     string    `json:"avatar"`
	CreateTime time.Time `json:"create_time"`
	UpdateTime time.Time `json:"update_time"`
}

// 获取一组用户信息
func QueryUserList(id_list []int) (users []User) {
	count := len(id_list)
	if count == 0 {
		return
	}
	idstr := strings.Trim(strings.Replace(fmt.Sprint(id_list), " ", ",", -1), "[]")
	rows, err := connection.Query("SELECT id, user_name, avatar, update_time, create_time FROM web_member WHERE id IN (" + idstr + ") LIMIT " + strconv.Itoa(count))
	if err != nil {
		log.Println("获取用户列表失败", err)
		return
	}
	defer rows.Close()
	for rows.Next() {
		var user User
		rows.Scan(&user.Id, &user.UserName, &user.Avatar, &user.UpdateTime, &user.CreateTime)
		users = append(users, user)
	}
	return
}

type Article struct {
	Id         int       `json:"id"`
	Title      string    `json:"title"`
	Tags       string    `json:"tags"`
	CreateTime time.Time `json:"create_time"`
	UpdateTime time.Time `json:"update_time"`
}

// 获取一组文章信息
func QueryArticleList(id_list []int) (articles []Article) {
	count := len(id_list)
	if count == 0 {
		return
	}
	idstr := strings.Trim(strings.Replace(fmt.Sprint(id_list), " ", ",", -1), "[]")
	rows, err := connection.Query("SELECT id, title, tags, update_time, create_time FROM web_article WHERE id IN (" + idstr + ")")
	if err != nil {
		log.Println("获取文章列表失败", err)
		return
	}
	defer rows.Close()
	for rows.Next() {
		var article Article
		rows.Scan(&article.Id, &article.Title, &article.Tags, &article.UpdateTime, &article.CreateTime)
		articles = append(articles, article)
	}
	return
}