worker を追加（yt-dlp によるダウンロード、段階別進捗、ffprobe 検査、実行中の取り消し）

internal/worker/progress.go

@@ -0,0 +1,81 @@
+package worker
+
+import (
+	"encoding/json"
+	"strings"
+
+	"gitea.kazu634.com/kazu634/tver/internal/store"
+)
+
+type outputEvent struct {
+	Event    string `json:"event"`
+	FormatID string `json:"format_id"`
+	Filepath string `json:"filepath"`
+	Progress struct {
+		DownloadedBytes    *float64 `json:"downloaded_bytes"`
+		TotalBytes         *float64 `json:"total_bytes"`
+		TotalBytesEstimate *float64 `json:"total_bytes_estimate"`
+		Speed              *float64 `json:"speed"`
+		ETA                *float64 `json:"eta"`
+		FragmentIndex      *float64 `json:"fragment_index"`
+		FragmentCount      *float64 `json:"fragment_count"`
+	} `json:"progress"`
+}
+
+func parseProgress(line string) (store.Progress, bool) {
+	var event outputEvent
+	if err := json.Unmarshal([]byte(line), &event); err != nil {
+		return store.Progress{}, false
+	}
+	phase := ""
+	switch event.Event {
+	case "download":
+		if strings.Contains(strings.ToLower(event.FormatID), "audio") {
+			phase = "audio"
+		} else {
+			phase = "video"
+		}
+	case "postprocess":
+		phase = "merging"
+	default:
+		return store.Progress{}, false
+	}
+	total := int64Pointer(event.Progress.TotalBytes)
+	estimate := false
+	if total == nil && event.Progress.TotalBytesEstimate != nil {
+		total = int64Pointer(event.Progress.TotalBytesEstimate)
+		estimate = true
+	}
+	var formatID *string
+	if event.FormatID != "" {
+		formatID = &event.FormatID
+	}
+	return store.Progress{Phase: phase, DownloadedBytes: int64Pointer(event.Progress.DownloadedBytes),
+		TotalBytes: total, TotalIsEstimate: estimate, SpeedBPS: event.Progress.Speed,
+		ETASeconds: event.Progress.ETA, FragmentIndex: int32Pointer(event.Progress.FragmentIndex),
+		FragmentCount: int32Pointer(event.Progress.FragmentCount), FormatID: formatID}, true
+}
+
+func int64Pointer(value *float64) *int64 {
+	if value == nil {
+		return nil
+	}
+	result := int64(*value)
+	return &result
+}
+
+func int32Pointer(value *float64) *int32 {
+	if value == nil {
+		return nil
+	}
+	result := int32(*value)
+	return &result
+}
+
+func parseAfterMove(line string) (string, bool) {
+	var event outputEvent
+	if err := json.Unmarshal([]byte(line), &event); err != nil || event.Event != "after_move" || event.Filepath == "" {
+		return "", false
+	}
+	return event.Filepath, true
+}