feat: add type to fs read api

pkg/utils/file.go

@@ -1,12 +1,12 @@
 package utils
 
 import (
-	"github.com/alist-org/alist/v3/internal/conf"
 	"io"
 	"io/ioutil"
 	"os"
 	"path/filepath"
 
+	"github.com/alist-org/alist/v3/internal/conf"
 	log "github.com/sirupsen/logrus"
 )
 
@@ -49,3 +49,24 @@ func CreateTempFile(r io.ReadCloser) (*os.File, error) {
 	}
 	return f, nil
 }
+
+// GetFileType get file type
+func GetFileType(filename string) int {
+	ext := Ext(filename)
+	if SliceContains(conf.TypesMap[conf.OfficeTypes], ext) {
+		return conf.OFFICE
+	}
+	if SliceContains(conf.TypesMap[conf.AudioTypes], ext) {
+		return conf.AUDIO
+	}
+	if SliceContains(conf.TypesMap[conf.VideoTypes], ext) {
+		return conf.VIDEO
+	}
+	if SliceContains(conf.TypesMap[conf.ImageTypes], ext) {
+		return conf.IMAGE
+	}
+	if SliceContains(conf.TypesMap[conf.TextTypes], ext) {
+		return conf.TEXT
+	}
+	return conf.UNKNOWN
+}

pkg/utils/json.go

@@ -1,15 +1,16 @@
 package utils
 
 import (
+	"io/ioutil"
+
 	json "github.com/json-iterator/go"
 	log "github.com/sirupsen/logrus"
-	"io/ioutil"
 )
 
 var Json = json.ConfigCompatibleWithStandardLibrary
 
-// WriteToJson write struct to json file
-func WriteToJson(src string, conf interface{}) bool {
+// WriteJsonToFile write struct to json file
+func WriteJsonToFile(src string, conf interface{}) bool {
 	data, err := Json.MarshalIndent(conf, "", "  ")
 	if err != nil {
 		log.Errorf("failed convert Conf to []byte:%s", err.Error())

pkg/utils/slice.go

@@ -1,5 +1,6 @@
 package utils
 
+// SliceEqual check if two slices are equal
 func SliceEqual[T comparable](a, b []T) bool {
 	if len(a) != len(b) {
 		return false
@@ -12,6 +13,7 @@ func SliceEqual[T comparable](a, b []T) bool {
 	return true
 }
 
+// SliceContains check if slice contains element
 func SliceContains[T comparable](arr []T, v T) bool {
 	for _, vv := range arr {
 		if vv == v {
@@ -21,9 +23,10 @@ func SliceContains[T comparable](arr []T, v T) bool {
 	return false
 }
 
+// SliceConvert convert slice to another type slice
 func SliceConvert[S any, D any](srcS []S, convert func(src S) (D, error)) ([]D, error) {
 	var res []D
-	for i, _ := range srcS {
+	for i := range srcS {
 		dst, err := convert(srcS[i])
 		if err != nil {
 			return nil, err