chore: cli refactor

cmd/export.go

@@ -0,0 +1,52 @@
+package cmd
+
+import (
+	"bufio"
+	"errors"
+	_ "github.com/abelith/spellbook/internal/adapters/json"
+	"github.com/spf13/cobra"
+	"io"
+	"os"
+)
+
+func NewExportCmd(app Application) *cobra.Command {
+	var format string
+	var out string
+
+	cmd := &cobra.Command{
+		Use:   "export",
+		Short: "Export spellbook",
+		Long:  `WIP`,
+		RunE: func(cmd *cobra.Command, args []string) (err error) {
+			ctx := cmd.Context()
+
+			var w io.Writer = os.Stdout
+			if out != "" {
+				f, err := os.OpenFile(out, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0644)
+				if err != nil {
+					return err
+				}
+				defer func() {
+					if innerErr := f.Close(); innerErr != nil {
+						err = errors.Join(err, innerErr)
+					}
+				}()
+				w = f
+			}
+
+			buf := bufio.NewWriter(w)
+			defer func() {
+				if innerErr := buf.Flush(); innerErr != nil {
+					err = errors.Join(err, innerErr)
+				}
+			}()
+
+			return app.ExportSpells(ctx, format, buf)
+		},
+	}
+
+	cmd.Flags().StringVarP(&format, "format", "f", "jsonl", "Output format")
+	cmd.Flags().StringVarP(&out, "out", "o", "", "Output")
+
+	return cmd
+}