/
commons.go
173 lines (143 loc) · 3.1 KB
/
commons.go
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package commons
import (
"encoding/json"
"fmt"
"io"
"log"
"math/rand"
"net/http"
"os"
"reflect"
"strconv"
"strings"
"time"
)
func init() {
rand.Seed(time.Now().UnixNano())
}
func GetUID() string {
s := 6
return randomString(s)
}
func randomString(l int) string {
r := strconv.Itoa(rand.Intn(10000))
bytes := make([]byte, l)
for i := 0; i < l; i++ {
bytes[i] = byte(randInt(64, 90))
}
return string(bytes) + r
}
func randInt(min int, max int) int {
return min + rand.Intn(max-min)
}
func IsInArray(val interface{}, array interface{}) (exists bool, index int) {
return FindIndexInArray(
func(curr interface{}) bool {
return reflect.DeepEqual(val, curr)
},
array,
)
}
func FindIndexInArray(predicate func(val interface{}) bool, array interface{}) (exists bool, index int) {
exists = false
index = -1
switch reflect.TypeOf(array).Kind() {
case reflect.Slice:
s := reflect.ValueOf(array)
for i := 0; i < s.Len(); i++ {
if predicate(s.Index(i).Interface()) {
index = i
exists = true
return
}
}
}
return
}
func FileBasename(s string) string {
n := strings.LastIndexByte(s, '.')
if n >= 0 {
return s[:n]
}
return s
}
func FileOrFolderExists(path string) bool {
_, err := os.Stat(path)
if err == nil {
return true
}
if os.IsNotExist(err) {
return false
}
return true
}
// Thx to https://www.socketloop.com/tutorials/golang-copy-directory-including-sub-directories-files
func CopyFile(source string, dest string) (err error) {
sourcefile, err := os.Open(source)
if err != nil {
return err
}
defer sourcefile.Close()
destfile, err := os.Create(dest)
if err != nil {
return err
}
defer destfile.Close()
_, err = io.Copy(destfile, sourcefile)
if err == nil {
si, err := os.Stat(source)
if err == nil {
err = os.Chmod(dest, si.Mode())
}
}
return
}
// Thx to https://www.socketloop.com/tutorials/golang-copy-directory-including-sub-directories-files
func CopyDir(source string, dest string) (err error) {
// get properties of source dir
sourceinfo, err := os.Stat(source)
if err != nil {
return err
}
// create dest dir
err = os.MkdirAll(dest, sourceinfo.Mode())
if err != nil {
return err
}
directory, _ := os.Open(source)
objects, err := directory.Readdir(-1)
for _, obj := range objects {
sourcefilepointer := source + "/" + obj.Name()
destinationfilepointer := dest + "/" + obj.Name()
if obj.IsDir() {
// create sub-directories - recursively
err = CopyDir(sourcefilepointer, destinationfilepointer)
if err != nil {
fmt.Println(err)
}
} else {
// perform copy
err = CopyFile(sourcefilepointer, destinationfilepointer)
if err != nil {
fmt.Println(err)
}
}
}
return
}
func WriteResponse(w http.ResponseWriter, statusCode int, message string) {
w.WriteHeader(statusCode)
w.Write([]byte(" " + message))
}
func WriteJsonResponse(w http.ResponseWriter, body interface{}) {
w.WriteHeader(http.StatusOK)
if err := json.NewEncoder(w).Encode(body); err != nil {
log.Printf("Error while send JSON data (%s)", err.Error())
}
}
func Check(e error) {
if e != nil {
log.Fatal(e)
panic(e)
}
}