message preview in progress

client/messagestorage.go

@@ -224,6 +224,25 @@ func GetMessagesHistory(peer *Peer, inAppMsgCount int, lastDbId int, wantMore in
 	return messages, nil
 }
 
+// make an image from the files content (loads the first image, or build a more complex view)
+func MessagePreview(msg *InternalUserMessage, password string) ([]byte, error) {
+	// get the hidden file name
+	if len(msg.FilePaths) == 0 {
+		return nil, nil
+	}
+	// get the hidden file
+	encData, err := os.ReadFile(msg.FilePaths[0])
+	if err != nil {
+		return nil, err
+	}
+	// decrypt the file
+	data, err := meowlib.SymDecrypt(password, encData)
+	if err != nil {
+		return nil, err
+	}
+	return data, nil
+}
+
 func getMessageCount(dbid string) (int, error) {
 	db, _ := sql.Open("sqlite3", filepath.Join(GetConfig().StoragePath, GetConfig().GetIdentity().Uuid, dbid+GetConfig().DbSuffix)) // Open the created SQLite File
 	defer db.Close()