From 9dcdd3e93c249f60c6d161cd423633da6bfbb780 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=A1=9C=E8=8F=AF?= <huan0016@gmail.com>
Date: Tue, 11 Apr 2023 17:50:17 +0800
Subject: [PATCH] listview

---
 bin/main.go | 142 +++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 135 insertions(+), 7 deletions(-)

diff --git a/bin/main.go b/bin/main.go
index 62e1b99..6226537 100644
--- a/bin/main.go
+++ b/bin/main.go
@@ -45,12 +45,19 @@ type Image struct {
 	UpdateTime time.Time `json:"update_time"`
 }
 
-type Images struct {
-	Page     int     `json:"page"`
-	PageSize int     `json:"page_size"`
-	Total    int     `json:"total"`
-	Next     bool    `json:"next"`
-	List     []Image `json:"list"`
+type Tag struct {
+	Id         int       `json:"id"`
+	Name       string    `json:"name"`
+	CreateTime time.Time `json:"create_time"`
+	UpdateTime time.Time `json:"update_time"`
+}
+
+type ListView struct {
+	Page     int           `json:"page"`
+	PageSize int           `json:"page_size"`
+	Total    int           `json:"total"`
+	Next     bool          `json:"next"`
+	List     []interface{} `json:"list"`
 }
 
 func main() {
@@ -59,6 +66,127 @@ func main() {
 	var mysqlConnection models.MysqlConnection
 	mysqlConnection.Init()
 
+	// 获取标签列表
+	http.HandleFunc("/tags", func(w http.ResponseWriter, r *http.Request) {
+		defer LogComponent(time.Now().UnixNano(), r) // 最后打印日志
+
+		// 标签的原理
+		// 1. 通过文章的 tag 字段, 获取所有的标签
+		// 2. 通过标签的 id, 获取标签的名称
+
+		// 热门权重指数的标签排序
+		// 1. 标签的权重指数 = (标签的文章数 * 标签的文章数) * 近期增幅
+		// 2. 标签的近期增幅 = (标签的文章数 - 标签的文章数) / 标签的文章数
+
+		// 标签是一个虚拟表, ORC 提取的数据都带有多个维度的比重概率(分布概率, 对比度概率, 文字大小, 文字重量, 词频概率, 词性概率, 词长概率, 词序概率)
+		// 经过规则过滤后, 用动态调参的指数计算乘积作为权重, 权重仍达到某个阈值的数据才会被视为标签
+
+		// 获取查询条件(忽略空值), 超级简洁写法
+		QueryConditions := func(key string) (list []string) {
+			if r.FormValue(key) != "" {
+				list = strings.Split(r.FormValue(key), ",")
+			}
+			return
+		}
+
+		// 拼接查询条件, 超级简洁写法
+		conditions := ""
+		if authors := QueryConditions("authors"); len(authors) > 0 {
+			conditions += fmt.Sprintf(" AND author IN (%s)", strings.Join(authors, ","))
+		}
+		if tags := QueryConditions("tags"); len(tags) > 0 {
+			conditions += fmt.Sprintf(" AND tag IN (%s)", strings.Join(tags, ","))
+		}
+		if categories := QueryConditions("categories"); len(categories) > 0 {
+			conditions += fmt.Sprintf(" AND categorie IN (%s)", strings.Join(categories, ","))
+		}
+
+		// 打印web_tags表的所有字段
+		rows, err := mysqlConnection.Database.Query("SELECT * FROM web_tags LIMIT 1")
+		if err != nil {
+			log.Println(err)
+			return
+		}
+		defer rows.Close()
+		for rows.Next() {
+			// 获取字段名
+			columns, err := rows.Columns()
+			if err != nil {
+				log.Println(err)
+				continue
+			}
+			// 获取字段值
+			values := make([]interface{}, len(columns))
+			for i := range values {
+				values[i] = new(interface{})
+			}
+			if err := rows.Scan(values...); err != nil {
+				log.Println(err)
+				continue
+			}
+			// 打印字段名和字段值
+			for i, column := range columns {
+				log.Println(column, *(values[i].(*interface{})))
+			}
+		}
+		if err := rows.Err(); err != nil {
+			log.Println(err)
+			return
+		}
+
+		// 打印web_tags表的总数
+		var total int
+		if err := mysqlConnection.Database.QueryRow("SELECT COUNT(*) FROM web_tags").Scan(&total); err != nil {
+			log.Println(err)
+			return
+		}
+		log.Println("total", total)
+
+		/**
+				// 获取标签列表
+				var tags ListView
+				tags.Page, tags.PageSize = stringToInt(r.FormValue("page"), 1), stringToInt(r.FormValue("pageSize"), 10)
+				rows, err := mysqlConnection.Database.Query("SELECT id, name, update_time, create_time FROM web_tags"+conditions+" ORDER BY id DESC LIMIT ?, ?", (tags.Page-1)*tags.PageSize, tags.PageSize)
+				if err != nil {
+					log.Println(err)
+					return
+				}
+				defer rows.Close()
+				for rows.Next() {
+					var tag Tag
+					if err := rows.Scan(&tag.Id, &tag.Name, &tag.UpdateTime, &tag.CreateTime); err != nil {
+						log.Println(err)
+						continue
+					}
+					tags.List = append(tags.List, tag)
+				}
+				if err := rows.Err(); err != nil {
+					log.Println(err)
+					return
+				}
+
+				// 获取总数
+				if err := mysqlConnection.Database.QueryRow("SELECT COUNT(*) FROM web_tags" + conditions).Scan(&tags.Total); err != nil {
+					log.Println(err)
+					return
+				}
+
+				// 是否有下一页
+				tags.Next = tags.Total > tags.Page*tags.PageSize
+
+				// 将对象转换为有缩进的JSON输出
+				json, err := json.MarshalIndent(tags, "", "    ")
+				if err != nil {
+					log.Println(err)
+					return
+				}
+
+				// 输出JSON
+				w.Header().Set("Content-Type", "application/json")
+				w.Write(json)
+		**/
+	})
+
 	// 获取图片信息列表(分页)
 	http.HandleFunc("/images", func(w http.ResponseWriter, r *http.Request) {
 		defer LogComponent(time.Now().UnixNano(), r) // 最后打印日志
@@ -100,7 +228,7 @@ func main() {
 		}
 
 		// 获取图片列表
-		var images Images
+		var images ListView
 		images.Page, images.PageSize = stringToInt(r.URL.Query().Get("page"), 1), stringToInt(r.URL.Query().Get("pageSize"), 10)
 		rows, err := mysqlConnection.Database.Query("SELECT id, content, update_time, create_time FROM web_images"+conditions+" LIMIT ?, ?", (images.Page-1)*images.PageSize, images.PageSize)
 		if err != nil {