Feat/yt dlp (#8)

* trying to add youtube download support

Signed-off-by: abzcoding <abzcoding@gmail.com>

* support cookies+youtube

Signed-off-by: abzcoding <abzcoding@gmail.com>

* cleanup

Signed-off-by: abzcoding <abzcoding@gmail.com>

---------

Signed-off-by: abzcoding <abzcoding@gmail.com>

Author: abzcoding

cmd/hget/main.go

@@ -1,18 +1,21 @@
 package main
 
 import (
+	"bufio"
 	"context"
 	"errors"
 	"flag"
 	"fmt"
 	"os"
 	"os/signal"
 	"runtime"
+	"strings"
 	"syscall"
 	"time"
 
 	"github.com/abzcoding/hget/internal/batch"
 	"github.com/abzcoding/hget/internal/downloader"
+	"github.com/abzcoding/hget/internal/extractor"
 	"github.com/abzcoding/hget/internal/state"
 	"github.com/abzcoding/hget/internal/ui"
 	"github.com/abzcoding/hget/internal/util"
@@ -24,7 +27,9 @@ var GitCommit string
 func main() {
 	flag.Usage = ui.PrintHelp
 
-	var proxy, filePath, bwLimit, resumeTask string
+	var proxy, filePath, bwLimit, resumeTask, extractorMode, cookiesFile, cookiesBrowser string
+	var quality, container, lang string
+	var pickFormat bool
 
 	conn := flag.Int("n", runtime.NumCPU(), "number of connections")
 	skiptls := flag.Bool("skip-tls", false, "skip certificate verification for https")
@@ -33,6 +38,13 @@ func main() {
 	flag.StringVar(&filePath, "file", "", "path to a file that contains one URL per line")
 	flag.StringVar(&bwLimit, "rate", "", "bandwidth limit during download, e.g. -rate 10kB or -rate 10MiB")
 	flag.StringVar(&resumeTask, "resume", "", "resume download task with given task name (or URL)")
+	flag.StringVar(&extractorMode, "extractor", "auto", "extractor mode: auto | yt-dlp | none (auto picks yt-dlp for known media hosts)")
+	flag.StringVar(&cookiesFile, "cookies", "", "path to Netscape-format cookies.txt for the extractor (forwarded to yt-dlp --cookies)")
+	flag.StringVar(&cookiesBrowser, "cookies-from-browser", "", "browser to extract cookies from for the extractor, e.g. firefox, chrome:Default (forwarded to yt-dlp --cookies-from-browser)")
+	flag.StringVar(&quality, "quality", "720p", "extractor quality preset: 360p | 480p | 720p | 1080p | 1440p | 4K | 8K | best | audio")
+	flag.StringVar(&container, "container", "mp4", "extractor output container: mp4 | mkv | webm")
+	flag.StringVar(&lang, "audio-lang", "en", "preferred audio language for the extractor (forwarded as yt-dlp -S lang:<code>); empty disables the bias")
+	flag.BoolVar(&pickFormat, "pick-format", false, "open the VCR rocker UI to pick resolution/audio/container by hand instead of using --quality")
 	probe := flag.String("probe", "", "probe URL for range and content-length without downloading")
 	timeout := flag.Duration("timeout", 15*time.Second, "timeout for awaiting response headers (e.g., 30s, 1m)")
 
@@ -71,12 +83,40 @@ func main() {
 			ui.PrintHelp()
 			os.Exit(1)
 		}
+		// Route to the yt-dlp shelf when any URL in the file looks
+		// extractable (or --extractor=yt-dlp forces it).  All-or-
+		// nothing: the whole list is treated as a video batch and any
+		// plain HTTP URL falls through yt-dlp's generic extractor.
+		if urls, useExtractor, err := loadBatchURLs(filePath, extractorMode); err != nil {
+			ui.ShowMessage(ui.MessageError, "FILE ERROR", err.Error())
+			os.Exit(1)
+		} else if useExtractor {
+			runExtractorBatch(rootCtx, urls, extractor.Options{
+				CookiesFile:        cookiesFile,
+				CookiesFromBrowser: cookiesBrowser,
+				LangPref:           lang,
+			}, extractor.QualityPreset(quality, container), pickFormat)
+			return
+		}
 		batch.RunBatchDownloads(rootCtx, filePath, *conn, *skiptls, proxy, bwLimit, *timeout, *verify)
 		return
 	}
 
 	// Single URL download.
 	downloadURL := args[0]
+
+	// Extractor mode (yt-dlp pipeline).  Picked when explicitly forced
+	// or when --extractor=auto and the URL host matches a known media
+	// site that hget's HTTP engine can't handle directly (YouTube etc.).
+	if shouldUseExtractor(extractorMode, downloadURL) {
+		runExtractor(rootCtx, downloadURL, extractor.Options{
+			CookiesFile:        cookiesFile,
+			CookiesFromBrowser: cookiesBrowser,
+			LangPref:           lang,
+		}, extractor.QualityPreset(quality, container), pickFormat)
+		return
+	}
+
 	destFile := util.TaskFromURL(downloadURL)
 
 	// Check if final file already exists
@@ -166,6 +206,193 @@ func runResume(rootCtx context.Context, resumeTask string, conn int, skiptls boo
 	runOne(rootCtx, st.URL, st, conn, skiptls, proxy, bwLimit, timeout)
 }
 
+// shouldUseExtractor decides whether the URL should be routed through
+// the yt-dlp pipeline.  Modes:
+//   - "yt-dlp": always use yt-dlp
+//   - "auto":   use yt-dlp when the host looks like a media site
+//   - "none":   never use yt-dlp (force the plain HTTP engine)
+func shouldUseExtractor(mode, url string) bool {
+	switch mode {
+	case "yt-dlp", "ytdlp":
+		return true
+	case "none", "off", "false":
+		return false
+	default: // "auto" and unknown values fall through to detection
+		return extractor.LooksExtractable(url)
+	}
+}
+
+// runExtractor drives the yt-dlp pipeline behind the VCR + Mixer TUI.
+// On success the resolved output file is left in the current working
+// directory (yt-dlp's default), matching hget's existing behaviour.
+//
+// `preset` is the quality+container chosen via --quality / --container.
+// When `pickFormat` is false (the default), the rocker UI never appears
+// and the preset is fed straight into yt-dlp.  When true, the user
+// gets a chance to override on a per-tape basis via the VCR's rockers.
+//
+// Cookie sources are validated BEFORE we start the TUI so a typo'd path
+// produces a clean error in the terminal instead of a cryptic message
+// flashing inside the alt-screen for half a second before exit.
+func runExtractor(rootCtx context.Context, url string, opts extractor.Options, preset extractor.FormatSelection, pickFormat bool) {
+	if opts.CookiesFile != "" {
+		if _, err := os.Stat(opts.CookiesFile); err != nil {
+			ui.ShowMessage(ui.MessageError, "COOKIES FILE NOT FOUND",
+				fmt.Sprintf("--cookies %s: %v", opts.CookiesFile, err))
+			os.Exit(1)
+		}
+	}
+	if opts.CookiesFile != "" && opts.CookiesFromBrowser != "" {
+		ui.ShowMessage(ui.MessageWarning, "COOKIE SOURCES",
+			"both --cookies and --cookies-from-browser are set; yt-dlp will pick the browser source")
+	}
+
+	itemCtx, cancelItem := context.WithCancelCause(rootCtx)
+	defer cancelItem(nil)
+
+	err := ui.RunExtractorTUI(ui.ExtractorRunOptions{
+		Ctx:    itemCtx,
+		URL:    url,
+		OnQuit: func() { cancelItem(downloader.ErrUserQuit) },
+	}, func(sel ui.ExtractorSelector) error {
+		picker := buildPicker(preset, pickFormat, sel)
+		return extractor.Pipeline(itemCtx, url, "", opts, pickFormat, picker)
+	})
+
+	if err != nil &&
+		!errors.Is(err, downloader.ErrUserQuit) &&
+		!errors.Is(err, downloader.ErrAbortBatch) &&
+		!errors.Is(err, context.Canceled) {
+		ui.Errorln(err)
+		os.Exit(1)
+	}
+}
+
+// buildPicker constructs the SelectorFunc handed to the extractor
+// pipeline.  Two flavours:
+//
+//   - pickFormat = false (default): a fast-path picker that returns
+//     the CLI preset immediately, never touching the UI.  The VCR
+//     stays in standby until yt-dlp starts streaming bytes.
+//
+//   - pickFormat = true: blocks on the TUI's REC commit so the user
+//     can manipulate the rockers.  The selection's adaptive
+//     descriptors propagate to subsequent tapes via the batch
+//     FormatAll policy.
+func buildPicker(preset extractor.FormatSelection, pickFormat bool, sel ui.ExtractorSelector) extractor.SelectorFunc {
+	if !pickFormat {
+		return func(ctx context.Context, _ extractor.Meta) (extractor.FormatSelection, error) {
+			return preset, nil
+		}
+	}
+	return func(ctx context.Context, _ extractor.Meta) (extractor.FormatSelection, error) {
+		s, err := sel(ctx)
+		if err != nil {
+			return extractor.FormatSelection{}, err
+		}
+		return extractor.FormatSelection{
+			Spec:      s.Spec,
+			Container: s.Container,
+			Pref: extractor.FormatPreference{
+				HeightCeiling: s.HeightCeiling,
+				FPSFloor:      s.FPSFloor,
+				VCodec:        s.VCodec,
+				ABRCeiling:    s.ABRCeiling,
+				Progressive:   s.Progressive,
+			},
+		}, nil
+	}
+}
+
+// loadBatchURLs reads the URL list and decides which pipeline owns it.
+// The rule is all-or-nothing: as soon as one URL looks extractable (or
+// --extractor=yt-dlp forces it) the whole list goes to yt-dlp.  Comment
+// lines (#) and blanks are stripped to match batch.RunBatchDownloads.
+func loadBatchURLs(filePath, extractorMode string) ([]string, bool, error) {
+	f, err := os.Open(filePath)
+	if err != nil {
+		return nil, false, fmt.Errorf("could not open URL list: %s\n%v", filePath, err)
+	}
+	defer f.Close()
+	var urls []string
+	scanner := bufio.NewScanner(f)
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+		if line == "" || strings.HasPrefix(line, "#") {
+			continue
+		}
+		urls = append(urls, line)
+	}
+	if scanErr := scanner.Err(); scanErr != nil {
+		return nil, false, fmt.Errorf("error reading file: %s\n%v", filePath, scanErr)
+	}
+	if len(urls) == 0 {
+		return nil, false, fmt.Errorf("no URLs found in: %s", filePath)
+	}
+	// Forced modes short-circuit the per-URL detection.
+	switch extractorMode {
+	case "yt-dlp", "ytdlp":
+		return urls, true, nil
+	case "none", "off", "false":
+		return urls, false, nil
+	}
+	for _, u := range urls {
+		if extractor.LooksExtractable(u) {
+			return urls, true, nil
+		}
+	}
+	return urls, false, nil
+}
+
+// runExtractorBatch drives the yt-dlp pipeline over a list of URLs
+// behind a single persistent VCR + cassette shelf TUI.  All cookies
+// validation, signal handling, and exit semantics mirror runExtractor.
+func runExtractorBatch(rootCtx context.Context, urls []string, opts extractor.Options, preset extractor.FormatSelection, pickFormat bool) {
+	if opts.CookiesFile != "" {
+		if _, err := os.Stat(opts.CookiesFile); err != nil {
+			ui.ShowMessage(ui.MessageError, "COOKIES FILE NOT FOUND",
+				fmt.Sprintf("--cookies %s: %v", opts.CookiesFile, err))
+			os.Exit(1)
+		}
+	}
+	if opts.CookiesFile != "" && opts.CookiesFromBrowser != "" {
+		ui.ShowMessage(ui.MessageWarning, "COOKIE SOURCES",
+			"both --cookies and --cookies-from-browser are set; yt-dlp will pick the browser source")
+	}
+
+	itemCtx, cancelItem := context.WithCancelCause(rootCtx)
+	defer cancelItem(nil)
+
+	err := ui.RunExtractorTUI(ui.ExtractorRunOptions{
+		Ctx: itemCtx,
+		// The shelf shows the queue; the source line above the deck
+		// gets per-tape updates via ExtractorURLMsg.  Seed with the
+		// first URL so the very first frame has something legible.
+		URL:    urls[0],
+		OnQuit: func() { cancelItem(downloader.ErrUserQuit) },
+	}, func(sel ui.ExtractorSelector) error {
+		// One persistent selector — the batch policy decides whether
+		// to actually invoke it for each tape.  BatchFormatAll is the
+		// default: the user picks once on tape #1; the adaptive
+		// descriptors travel with the cached selection so subsequent
+		// tapes that lack the original format IDs still resolve to a
+		// close match (yt-dlp filter syntax with progressive fallback).
+		//
+		// When `pickFormat` is false the picker collapses to a fast
+		// preset-returner; the rocker UI never shows.
+		picker := buildPicker(preset, pickFormat, sel)
+		return extractor.BatchPipeline(itemCtx, urls, "", opts, extractor.BatchFormatAll, pickFormat, picker)
+	})
+
+	if err != nil &&
+		!errors.Is(err, downloader.ErrUserQuit) &&
+		!errors.Is(err, downloader.ErrAbortBatch) &&
+		!errors.Is(err, context.Canceled) {
+		ui.Errorln(err)
+		os.Exit(1)
+	}
+}
+
 func runOne(rootCtx context.Context, url string, st *state.State, conn int, skiptls bool, proxy, bwLimit string, timeout time.Duration) {
 	itemCtx, cancelItem := context.WithCancelCause(rootCtx)
 	defer cancelItem(nil)