/
utils.go
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/
utils.go
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// Copyright (c) 2021 Terminus, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package common
import (
"encoding/json"
"reflect"
"sort"
"time"
)
// Transfer transfer a to b with json, kind of b must be pointer
func Transfer(a, b interface{}) error {
if reflect.ValueOf(b).Kind() != reflect.Ptr {
return PtrRequiredErr
}
if a == nil {
return NothingToBeDoneErr
}
aBytes, err := json.Marshal(a)
if err != nil {
return err
}
if err := json.Unmarshal(aBytes, b); err != nil {
return err
}
return nil
}
// ConvertToMap transfer any struct to map
func ConvertToMap(obj interface{}) (map[string]interface{}, error) {
out := make(map[string]interface{})
t := reflect.TypeOf(obj)
v := reflect.ValueOf(obj)
if v.Kind() == reflect.Ptr {
v = v.Elem()
}
if v.Kind() != reflect.Struct {
return nil, TypeNotAvailableErr
}
var (
fieldData interface{}
err error
)
for i := 0; i < t.NumField(); i++ {
field := v.Field(i)
switch field.Kind() {
case reflect.Struct:
fallthrough
case reflect.Ptr:
if fieldData, err = ConvertToMap(field.Interface()); err != nil {
return nil, err
}
default:
fieldData = field.Interface()
}
out[t.Field(i).Name] = fieldData
}
return out, nil
}
func GetPercent(a, b float64) int {
return int(a * 100 / b)
}
func GetInt64Len(a int64) int {
length := 0
for a > 0 {
length++
a /= 10
}
return length
}
/* ResetNumberBase
* e.g. : 20 100 to 2 10 , 0.1 1000 to 1 10000
*/
func ResetNumberBase(a, b float64) (float64, float64) {
if a <= 0 || b <= 0 {
return a, b
}
for a < 1 || b < 1 {
a *= 10
b *= 10
}
for a >= 10 || b >= 10 {
a /= 10
b /= 10
}
return a, b
}
// SortByString sort by string value
func SortByString(data []interface{}, sortColumn string, order OrderEnum) {
sort.Slice(data, func(i, j int) bool {
a := reflect.ValueOf(data[i])
b := reflect.ValueOf(data[j])
if order == Asc {
return a.FieldByName(sortColumn).String() > b.FieldByName(sortColumn).String()
} else {
return a.FieldByName(sortColumn).String() < b.FieldByName(sortColumn).String()
}
})
}
// SortByNode sort by node struct
func SortByNode(data []interface{}, sortColumn string, order OrderEnum) {
sort.Slice(data, func(i, j int) bool {
a := reflect.ValueOf(data[i])
b := reflect.ValueOf(data[j])
if order == Asc {
return a.FieldByName(sortColumn).FieldByName("Value").String() > b.FieldByName(sortColumn).FieldByName("Value").String()
} else {
return a.FieldByName(sortColumn).FieldByName("Value").String() < b.FieldByName(sortColumn).FieldByName("Value").String()
}
})
}
// SortByDistribution sort by percent
func SortByDistribution(data []interface{}, sortColumn string, order OrderEnum) {
sort.Slice(data, func(i, j int) bool {
a := reflect.ValueOf(data[i])
b := reflect.ValueOf(data[j])
if order == Asc {
return a.FieldByName(sortColumn).FieldByName("Value").FieldByName("Percent").Float() >
b.FieldByName(sortColumn).FieldByName("Value").FieldByName("Percent").Float()
}
return a.FieldByName(sortColumn).FieldByName("Value").FieldByName("Percent").Float() <
b.FieldByName(sortColumn).FieldByName("Value").FieldByName("Percent").Float()
})
}
func SurviveTime(startTime string) (string, error) {
surviveTime, err := time.Parse("2006-01-02 15:04:05", startTime)
if err != nil {
return "", err
}
d := time.Now().Sub(surviveTime)
return d.String(), nil
}