A lot of rewrite here

internal/dav/getfile.go

@@ -0,0 +1,91 @@
+package dav
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"net/url"
+	"os"
+	"path"
+	"path/filepath"
+	"regexp"
+	"strings"
+
+	"github.com/debridmediamanager.com/zurg/internal/torrent"
+	"github.com/debridmediamanager.com/zurg/pkg/realdebrid"
+)
+
+// HandleGetRequest handles a GET request to a file
+func HandleGetRequest(w http.ResponseWriter, r *http.Request, t *torrent.TorrentManager) {
+	requestPath := path.Clean(r.URL.Path)
+
+	segments := strings.Split(requestPath, "/")
+	// If there are less than 3 segments, return an error or adjust as needed
+	if len(segments) < 3 {
+		log.Println("Invalid url", requestPath)
+		http.Error(w, "Cannot find file", http.StatusNotFound)
+	}
+
+	// Get the last two segments
+	torrentName := segments[len(segments)-2]
+	torrents := findAllTorrentsWithName(t, torrentName)
+	if torrents == nil {
+		log.Println("Cannot find directory", requestPath)
+		http.Error(w, "Cannot find file", http.StatusNotFound)
+		return
+	}
+
+	filename := segments[len(segments)-1]
+
+	filenameV2, linkFragment := extractIDFromFilename(filename)
+	link := findLinkByFragment(torrents, linkFragment)
+
+	unrestrictFn := func() (*realdebrid.UnrestrictResponse, error) {
+		return realdebrid.UnrestrictLink(os.Getenv("RD_TOKEN"), link)
+	}
+	resp := realdebrid.RetryUntilOk(unrestrictFn)
+	if resp == nil {
+		// TODO: Delete the link from the database
+		log.Println("Cannot unrestrict link")
+		http.Error(w, "Cannot find file", http.StatusNotFound)
+		return
+	}
+	if resp.Filename != filenameV2 {
+		// TODO: Redo the logic to handle mismatch
+		log.Println("Filename mismatch", resp.Filename, filenameV2)
+	}
+	http.Redirect(w, r, resp.Download, http.StatusFound)
+}
+
+// extractIDFromFilename extracts the link ID from a filename
+func extractIDFromFilename(filename string) (string, string) {
+	filenameV2, err := url.PathUnescape(filename)
+	if err != nil {
+		filenameV2 = filename
+	}
+	ext := filepath.Ext(filenameV2)
+	name := strings.TrimSuffix(filenameV2, ext)
+
+	r := regexp.MustCompile(`\sDMM(\w+)`)
+	matches := r.FindStringSubmatch(name)
+	if len(matches) < 2 {
+		// No ID found
+		return filenameV2, ""
+	}
+
+	// Remove ID from filename
+	originalName := strings.Replace(name, matches[0], "", 1)
+	return originalName + ext, matches[1]
+}
+
+// findLinkByFragment finds a link by a fragment, it might be wrong
+func findLinkByFragment(torrents []realdebrid.Torrent, fragment string) string {
+	for _, torrent := range torrents {
+		for _, link := range torrent.Links {
+			if strings.HasPrefix(link, fmt.Sprintf("https://real-debrid.com/d/%s", fragment)) {
+				return link
+			}
+		}
+	}
+	return ""
+}