Now actually use Thumbnail that was loaded from db, instead of re downloading it every time. Also save Thumbnail to Manga if it couldnt be saved before

internal/database/database.go

@@ -136,10 +136,23 @@ func (dbMgr *Manager) Save() error {
 				}
 			}
 		} else {
-			_, err := db.Exec("UPDATE Manga set Title = ?, TimeStampUnixEpoch = ? WHERE ID = ?", m.Title, m.TimeStampUnix, m.Id)
+			tSet := 0
+			err := db.QueryRow("SELECT COUNT(*) from Manga where ID = ? and Thumbnail IS NOT NULL", m.Id).Scan(&tSet)
 			if err != nil {
 				return err
 			}
+
+			if tSet != 0 {
+				_, err = db.Exec("UPDATE Manga set Title = ?, TimeStampUnixEpoch = ? WHERE ID = ?", m.Title, m.TimeStampUnix, m.Id)
+				if err != nil {
+					return err
+				}
+			} else {
+				_, err = db.Exec("UPDATE Manga set Title = ?, TimeStampUnixEpoch = ?, Thumbnail = ? WHERE ID = ?", m.Title, m.TimeStampUnix, m.Thumbnail.Bytes(), m.Id)
+				if err != nil {
+					return err
+				}
+			}
 		}
 	}
 
@@ -195,7 +208,9 @@ func (dbMgr *Manager) load() error {
 		if err = rows.Scan(&manga.Id, &manga.Title, &manga.TimeStampUnix, &thumbnail); err != nil {
 			return err
 		}
+		if len(thumbnail) != 0 {
 			manga.Thumbnail = bytes.NewBuffer(thumbnail)
+		}
 
 		latestChapter := db.QueryRow("SELECT Id, Url, Name, Number, TimeStampUnixEpoch FROM Chapter where MangaID = ? ORDER BY TimeStampUnixEpoch desc LIMIT 1", manga.Id)
 		chapter := Chapter{}

internal/server/handler.go

@@ -59,7 +59,7 @@ func (s *Server) HandleMenu(w http.ResponseWriter, _ *http.Request) {
 
 		t1 := time.Now().UnixNano()
 
-		thumbnail, err := s.LoadThumbnail(manga.Id)
+		thumbnail, err := s.LoadThumbnail(manga)
 		//TODO: Add default picture instead of not showing Manga at all
 		if err != nil {
 			continue
@@ -71,8 +71,9 @@ func (s *Server) HandleMenu(w http.ResponseWriter, _ *http.Request) {
 		thumbNs += t2 - t1
 
 		t1 = time.Now().UnixNano()
-		// This is very slow
 
+		// This is very slow
+		// TODO: put this into own Method
 		if manga.LastChapterNum == 0 {
 			l, err := s.Provider.GetChapterList("/title/" + strconv.Itoa(manga.Id))
 			if err != nil {
@@ -275,7 +276,7 @@ func (s *Server) HandleImage(w http.ResponseWriter, r *http.Request) {
 //go:embed favicon.ico
 var ico []byte
 
-func (s *Server) HandleFavicon(w http.ResponseWriter, r *http.Request) {
+func (s *Server) HandleFavicon(w http.ResponseWriter, _ *http.Request) {
 	w.Header().Set("Content-Type", "image/webp")
 	_, err := w.Write(ico)
 	if err != nil {

internal/server/server.go

@@ -157,16 +157,21 @@ func (s *Server) LoadCurr() {
 	fmt.Println("Loaded current")
 }
 
-func (s *Server) LoadThumbnail(mangaId int) (path string, err error) {
+func (s *Server) LoadThumbnail(manga *database.Manga) (path string, err error) {
-	strId := strconv.Itoa(mangaId)
+	strId := strconv.Itoa(manga.Id)
 
-	//s.Mutex.Lock()
+	s.Mutex.Lock()
-	//defer s.Mutex.Unlock()
+	defer s.Mutex.Unlock()
 	if s.ImageBuffers[strId] != nil {
 		return strId, nil
 	}
 
-	url, err := s.Provider.GetThumbnail(strconv.Itoa(mangaId))
+	if manga.Thumbnail != nil {
+		s.ImageBuffers[strId] = manga.Thumbnail
+		return strId, nil
+	}
+
+	url, err := s.Provider.GetThumbnail(strId)
 	if err != nil {
 		return "", err
 	}
@@ -174,6 +179,7 @@ func (s *Server) LoadThumbnail(mangaId int) (path string, err error) {
 	if err != nil {
 		return "", err
 	}
+	manga.Thumbnail = ram
 	s.ImageBuffers[strId] = ram
 	return strId, nil
 }