Make metadata loading hot

DirectoryIndexers/DirectoryIndexer.go

@@ -66,42 +66,13 @@ func Index(path string, results chan FileList) {
 
 			id := filenameToID(video.Name())
 
-			videoObject := VideoFile{
-				Filename:  video.Name(),
-				Extension: extension,
-				Title:     filenameToTitle(video.Name(), extension),
-				Id:        id,
-			}
-
-			metadataFilename := strings.TrimSuffix(video.Name(), filepath.Ext(video.Name())) + ".info.json"
-			jsonMetadataFile, err := os.Open(path + metadataFilename)
-			if err != nil {
-				FL.Lock()
-				FL.Files[id] = videoObject
-				FL.Unlock()
-				wg.Done()
-				return
-			}
-
-			metadataBytes, _ := ioutil.ReadAll(jsonMetadataFile)
-			_ = jsonMetadataFile.Close()
-
-			metadata, err := ParseMetadata(metadataBytes)
-			if err != nil {
-				FL.Lock()
-				FL.Files[id] = videoObject
-				FL.Unlock()
-				wg.Done()
-				return
-			}
-
 			FL.Lock()
 			FL.Files[id] = VideoFile{
 				Filename:  video.Name(),
 				Extension: extension,
 				Title:     filenameToTitle(video.Name(), extension),
 				Id:        id,
-				Metadata:  metadata,
+				Metadata:  Metadata{},
 			}
 			FL.Unlock()
 

DirectoryIndexers/MetadataParser.go

@@ -3,6 +3,10 @@ package DirectoryIndexers
 import (
 	"encoding/json"
 	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
 )
 
 type Metadata struct {
@@ -50,3 +54,21 @@ func ParseMetadata(jsonBytes []byte) (Metadata, error) {
 	}
 	return meta, err
 }
+
+func LoadMetadata(videoobject VideoFile, path string) (Metadata, error) {
+	metadataFilename := strings.TrimSuffix(videoobject.Filename, filepath.Ext(videoobject.Filename)) + ".info.json"
+	jsonMetadataFile, err := os.Open(path + metadataFilename)
+	if err != nil {
+		return Metadata{}, err
+	}
+
+	metadataBytes, _ := ioutil.ReadAll(jsonMetadataFile)
+	_ = jsonMetadataFile.Close()
+
+	metadata, err := ParseMetadata(metadataBytes)
+	if err != nil {
+		return Metadata{}, err
+	}
+
+	return metadata, nil
+}

PageHandlers/View.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"log"
 	"net/http"
+	"reflect"
 	"ytdlp-viewer/DirectoryIndexers"
 )
 
@@ -16,9 +17,9 @@ type ViewPageData struct {
 	Metadata 	DirectoryIndexers.Metadata
 }
 
-func View(writer http.ResponseWriter, request *http.Request, FL *DirectoryIndexers.FileList) {
+func View(writer http.ResponseWriter, request *http.Request, FL *DirectoryIndexers.FileList, path string) {
-	FL.RLock()
+	FL.Lock()
-	defer FL.RUnlock()
+	defer FL.Unlock()
 
 	keys, ok := request.URL.Query()["id"]
 	if !ok || len(keys[0]) < 1 {
@@ -30,6 +31,17 @@ func View(writer http.ResponseWriter, request *http.Request, FL *DirectoryIndexe
 		return
 	}
 
+	// if no metadata loaded, do so
+	if reflect.ValueOf(FL.Files[keys[0]].Metadata).IsZero() {
+		metadata, err := DirectoryIndexers.LoadMetadata(FL.Files[keys[0]], path)
+		if err == nil {
+			var fileObject DirectoryIndexers.VideoFile
+			fileObject = FL.Files[keys[0]]
+			fileObject.Metadata = metadata
+			FL.Files[keys[0]] = fileObject
+		}
+	}
+
 	video := FL.Files[keys[0]]
 	data := ViewPageData{
 		Title:     video.Title,

main.go

@@ -50,7 +50,7 @@ func main() {
 	})
 	http.HandleFunc("/view", func(writer http.ResponseWriter, request *http.Request) {
 		fmt.Println(time.Now().String(),request.URL)
-		PageHandlers.View(writer, request, &FL)
+		PageHandlers.View(writer, request, &FL, path)
 	})
 	http.Handle("/videos/", http.StripPrefix("/videos/", http.FileServer(http.Dir(path))))