add paginate for db (#16)

config/README.md

@@ -0,0 +1,16 @@
+# config
+
+`config` encapsulates the use of `viper` and parses the configuration file of the specified path into a structure.
+
+```go
+import(
+	"github.com/huweihuang/golib/config"
+)
+
+func main() {
+	err := config.InitConfigObjectByPath(configFile, &configs.GlobalConfig)
+	if err != nil {
+		panic(err)
+	}
+}	
+```

db/util.go

@@ -0,0 +1,43 @@
+package db
+
+import "gorm.io/gorm"
+
+func Paginate(page int, pageSize int) func(db *gorm.DB) *gorm.DB {
+	return func(db *gorm.DB) *gorm.DB {
+		if page == 0 {
+			page = 1
+		}
+		switch {
+		case pageSize > 500:
+			pageSize = 500
+		case pageSize <= 0:
+			pageSize = 10
+		}
+		offset := (page - 1) * pageSize
+		return db.Offset(offset).Limit(pageSize)
+	}
+}
+
+func PaginatedFind(db *gorm.DB, page, pageSize int, target interface{}) (count int64, err error) {
+	err = db.Count(&count).Error
+	if err != nil {
+		return 0, err
+	}
+	err = db.Scopes(Paginate(page, pageSize)).Find(target).Error
+	return count, err
+}
+
+func ParamsToQuery(queryMap map[string]interface{}) (queryStr string, args []interface{}) {
+	for key, value := range queryMap {
+		queryStr = AppendQuery(queryStr, key)
+		args = append(args, value)
+	}
+	return queryStr, args
+}
+
+func AppendQuery(query, newQuery string) string {
+	if query != "" {
+		return query + " AND " + newQuery
+	}
+	return newQuery
+}

gin/middlewares/middleware.go

@@ -18,7 +18,6 @@ func SucceedWrapper(c *gin.Context, msg string, data interface{}) {
 		Message: fmt.Sprintf("%s succeed", msg),
 		Data:    data,
 	}
-	log.Logger().With("resp", resp).Info(msg)
 	c.JSON(http.StatusOK, resp)
 }
 

httplib/httplib.go

@@ -10,7 +10,7 @@ import (
 	log "github.com/huweihuang/golib/logger/zap"
 )
 
-func CallURL(method, url, path string, header map[string]string, request interface{}, response interface{}) (
+func RequestURL(method, url, path string, header map[string]string, request interface{}, response interface{}) (
 	statusCode int, body []byte, err error) {
 
 	log.Logger().With(