refactor: major project restructure

internal/store/download_info.go

@@ -0,0 +1,59 @@
+package store
+
+import (
+	"encoding/json"
+	"fmt"
+	"time"
+
+	"go.etcd.io/bbolt"
+)
+
+type DownloadInfo struct {
+	SongID     string    `json:"song_id"`
+	Quality    string    `json:"quality"`
+	Path       string    `json:"path"`
+	Hash       string    `json:"hash"`
+	Downloaded time.Time `json:"downloaded_at"`
+}
+
+func GetDownloadInfo(songID string) (*DownloadInfo, error) {
+	var info DownloadInfo
+
+	if err := db.View(func(tx *bbolt.Tx) error {
+		b := tx.Bucket(trackBucket)
+		if b == nil {
+			return fmt.Errorf("bucket not found")
+		}
+
+		data := b.Get([]byte(songID))
+		if data == nil {
+			return fmt.Errorf("not found")
+		}
+		return json.Unmarshal(data, &info)
+	}); err != nil {
+		return nil, err
+	}
+
+	return &info, nil
+}
+
+func (d *DownloadInfo) Save() error {
+	return db.Update(func(tx *bbolt.Tx) error {
+		b := tx.Bucket(trackBucket)
+		if b == nil {
+			return fmt.Errorf("bucket not found")
+		}
+
+		data, err := json.Marshal(d)
+		if err != nil {
+			return err
+		}
+
+		err = b.Put([]byte(d.SongID), data)
+		if err != nil {
+			return err
+		}
+
+		return nil
+	})
+}