getting started

main.go

@@ -0,0 +1,105 @@
+package main
+
+import (
+	"database/sql"
+     "fmt"
+   "log"
+	"io"
+	"io/ioutil"
+	"os"
+	"path"
+
+	_ "modernc.org/sqlite"
+)
+
+const (
+	jellyDB   = "jellyfin.db"
+	libraryDB = "library.db"
+)
+
+func main() {
+	data := os.Args[1]
+	fromU := os.Args[2]
+	toU := os.Args[3]
+   _ = toU
+
+	workd, err := ioutil.TempDir(os.TempDir(), "jellyfin-user-clone.*")
+	if err != nil {
+		panic(err)
+	}
+
+	if err := cp(path.Join(data, jellyDB), path.Join(workd, jellyDB)); err != nil {
+		panic(err)
+	} else if err := cp(path.Join(data, libraryDB), path.Join(workd, libraryDB)); err != nil {
+		panic(err)
+	}
+
+	jellyfinDB, err := sql.Open("sqlite", path.Join(workd, jellyDB))
+	if err != nil {
+		panic(err)
+	}
+	defer jellyfinDB.Close()
+
+   fromUUID, err := SelectOne[string](jellyfinDB, `SELECT Id FROM Users WHERE Username = $1`, fromU)
+   if err != nil {
+      panic(err)
+   }
+
+   fromID, err := SelectOne[int](jellyfinDB, `SELECT InternalId FROM Users WHERE Id = $1`, fromUUID)
+   if err != nil {
+      panic(err)
+   }
+
+   log.Println(fromU, fromUUID, fromID)
+}
+
+func cp(from, to string) error {
+	fromF, err := os.Open(from)
+	if err != nil {
+		return err
+	}
+	defer fromF.Close()
+
+	toF, err := os.Create(to)
+	if err != nil {
+		return err
+	}
+	defer toF.Close()
+
+	_, err = io.Copy(toF, fromF)
+	return err
+}
+
+func SelectOne[T any](db *sql.DB, q string, args ...any) (T, error) {
+   var some T
+
+   results, err := Select[T](db, q, args...)
+   if err != nil {
+      return some, err
+   }
+
+   if len(results) != 1 {
+      return some, fmt.Errorf("expected 1 result but got %d (%+v)", len(results), results)
+   }
+
+   return results[0], nil
+}
+
+func Select[T any](db *sql.DB, q string, args ...any) ([]T, error) {
+   rows, err := db.Query(q, args...)
+   if err != nil {
+      return nil, err
+   }
+   defer rows.Close()
+
+   results := []T{}
+   for rows.Next() {
+      var some T
+      if err := rows.Scan(&some); err != nil {
+         return nil, err
+      }
+      results = append(results, some)
+   }
+
+   return results, rows.Err()
+}