fixed double ext and playlist title detection (#106)

frontend/src/components/DownloadDialog.tsx

@@ -25,6 +25,7 @@ import {
   FC,
   Suspense,
   forwardRef,
+  useEffect,
   useMemo,
   useRef,
   useState,
@@ -92,6 +93,10 @@ const DownloadDialog: FC<Props> = ({ open, onClose, onDownloadStart }) => {
 
   const [isPending, startTransition] = useTransition()
 
+  useEffect(() => {
+    setCustomArgs('')
+  }, [open])
+
   /**
     * Retrive url from input, cli-arguments from checkboxes and emits via WebSocket
   */

server/internal/playlist.go

@@ -5,6 +5,7 @@ import (
 	"errors"
 	"log"
 	"os/exec"
+	"strings"
 	"time"
 
 	"github.com/marcopeocchi/yt-dlp-web-ui/server/cli"
@@ -12,9 +13,10 @@ import (
 )
 
 type metadata struct {
-	Entries []DownloadInfo `json:"entries"`
-	Count   int            `json:"playlist_count"`
-	Type    string         `json:"_type"`
+	Entries       []DownloadInfo `json:"entries"`
+	Count         int            `json:"playlist_count"`
+	PlaylistTitle string         `json:"title"`
+	Type          string         `json:"_type"`
 }
 
 func PlaylistDetect(req DownloadRequest, mq *MessageQueue, db *MemoryDB) error {
@@ -57,6 +59,15 @@ func PlaylistDetect(req DownloadRequest, mq *MessageQueue, db *MemoryDB) error {
 		for i, meta := range m.Entries {
 			delta := time.Second.Microseconds() * int64(i+1)
 
+			// detect playlist title from metadata since each playlist entry will be
+			// treated as an individual download
+			req.Rename = strings.Replace(
+				req.Rename,
+				"%(playlist_title)s",
+				m.PlaylistTitle,
+				1,
+			)
+
 			proc := &Process{
 				Url:      meta.OriginalURL,
 				Progress: DownloadProgress{},

server/internal/process.go

@@ -84,9 +84,11 @@ func (p *Process) Start() {
 	}
 
 	if p.Output.Filename != "" {
-		out.Filename = p.Output.Filename + ".%(ext)s"
+		out.Filename = p.Output.Filename
 	}
 
+	buildFilename(&p.Output)
+
 	params := append([]string{
 		strings.Split(p.Url, "?list")[0], //no playlist
 		"--newline",
@@ -298,3 +300,16 @@ func (p *Process) SetMetadata() error {
 func (p *Process) getShortId() string {
 	return strings.Split(p.Id, "-")[0]
 }
+
+func buildFilename(o *DownloadOutput) {
+	if o.Filename != "" && strings.Contains(o.Filename, ".%(ext)s") {
+		o.Filename += ".%(ext)s"
+	}
+
+	o.Filename = strings.Replace(
+		o.Filename,
+		".%(ext)s.%(ext)s",
+		".%(ext)s",
+		1,
+	)
+}