provide better download name

README.md

@@ -50,5 +50,5 @@ Build and push this container to ghcr
 - [ ] edit original metadata
 - [ ] Download playlists
 - [ ] change from Audio -> Video
-- [ ] Provide a better name for downloaded files
+- [x] Provide a better name for downloaded files
 - [x] Environment variable to control whether "Secure" flag set on cookie

handlers.go

@@ -7,6 +7,7 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
+	"regexp"
 	"strconv"
 	"strings"
 	"time"
@@ -635,6 +636,7 @@ type VideoTemplate struct {
 	FPS              string
 	Size             string
 	Filename         string
+	DownloadFilename string
 	StreamRate       string
 	TempURL
 }
@@ -643,10 +645,46 @@ type AudioTemplate struct {
 	Kbps             string
 	Size             string
 	Filename         string
+	DownloadFilename string
 	StreamRate       string
 	TempURL
 }
 
+func makeNiceFilename(input string) string {
+	// Convert to lowercase
+	input = strings.ToLower(input)
+
+	// Replace spaces with underscores
+	input = strings.ReplaceAll(input, " ", "_")
+
+	// Replace common special characters
+	replacements := map[string]string{
+		"æ": "ae", "ø": "oe", "å": "aa", "ä": "ae", "ö": "oe", "ü": "ue",
+		"ß": "ss", "ñ": "n", "ç": "c", "œ": "oe",
+	}
+	for old, new := range replacements {
+		input = strings.ReplaceAll(input, old, new)
+	}
+
+	// Remove any remaining non-alphanumeric characters (except underscores)
+	reg := regexp.MustCompile("[^a-z0-9_\\.]+")
+	input = reg.ReplaceAllString(input, "")
+
+	// Trim leading/trailing underscores
+	input = strings.Trim(input, "_")
+
+	// Collapse multiple underscores into a single one
+	reg = regexp.MustCompile("_+")
+	input = reg.ReplaceAllString(input, "_")
+
+	// Ensure the filename is not empty
+	if input == "" {
+		input = "unnamed_file"
+	}
+
+	return input
+}
+
 func videoHandler(c echo.Context) error {
 	id, _ := strconv.Atoi(c.Param("id"))
 	var orig Original
@@ -684,6 +722,7 @@ func videoHandler(c echo.Context) error {
 			FPS:              fmt.Sprintf("%.1f", video.FPS),
 			Size:             humanSize(video.Size),
 			Filename:         video.Filename,
+			DownloadFilename: makeNiceFilename(orig.Title),
 			StreamRate:       fmt.Sprintf("%.1f KiB/s", rate/1024),
 			TempURL:          tempURL,
 		})
@@ -701,6 +740,7 @@ func videoHandler(c echo.Context) error {
 			Kbps:             fmt.Sprintf("%.1f kbps", kbps),
 			Size:             humanSize(audio.Size),
 			Filename:         audio.Filename,
+			DownloadFilename: makeNiceFilename(orig.Title),
 			StreamRate:       fmt.Sprintf("%.1f KiB/s", rate/1024),
 			TempURL:          tempURL,
 		})

templates/video.html

@@ -54,7 +54,7 @@
         </video>
     </div>
     <div class="video-download">
-        <a href="/data/{{.Filename}}" download>Download ({{.Size}}, {{.StreamRate}})</a>
+        <a href="/data/{{.Filename}}" download="{{.DownloadFilename}}">Download ({{.Size}}, {{.StreamRate}})</a>
     </div>
     {{end}}
 
@@ -67,7 +67,7 @@
         </audio>
     </div>
     <div class="audio-download">
-        <a href="/data/{{.Filename}}" download>Download ({{.Size}}, {{.StreamRate}})</a>
+        <a href="/data/{{.Filename}}" download="{{.DownloadFilename}}">Download ({{.Size}}, {{.StreamRate}})</a>
     </div>
     {{end}}