From f97e9b0aa99d9d2f6b5aec31ce9f08d06eef8fa8 Mon Sep 17 00:00:00 2001
From: Kirillkriv <kirill.krivoy@icloud.com>
Date: Sun, 16 Aug 2026 22:39:51 +0500
Subject: [PATCH] feat: export command

---
 internal/application/application.go | 23 +++++++++++++
 internal/controllers/cli/cli.go     |  3 ++
 internal/controllers/cli/export.go  | 52 +++++++++++++++++++++++++++++
 3 files changed, 78 insertions(+)
 create mode 100644 internal/controllers/cli/export.go

diff --git a/internal/application/application.go b/internal/application/application.go
index 813a0be..2c4c85c 100644
--- a/internal/application/application.go
+++ b/internal/application/application.go
@@ -2,7 +2,9 @@ package application
 
 import (
 	"context"
+	"github.com/abelith/spellbook/internal/adapters/exporter"
 	"github.com/abelith/spellbook/internal/models"
+	"io"
 )
 
 type SpellCaster interface {
@@ -70,3 +72,24 @@ func (a *Application) CastSpell(
 ) (models.CastResult, error) {
 	return a.caster.Cast(ctx, spellCast)
 }
+
+func (a *Application) ExportSpells(
+	ctx context.Context,
+	name string,
+	w io.Writer,
+) error {
+	ch, errCh, err := a.spellQuery.Export(ctx)
+	if err != nil {
+		return err
+	}
+
+	if err := exporter.Export(ctx, name, ch, w); err != nil {
+		return err
+	}
+
+	if err := <-errCh; err != nil {
+		return err
+	}
+
+	return nil
+}
diff --git a/internal/controllers/cli/cli.go b/internal/controllers/cli/cli.go
index bcb2404..bde69c4 100644
--- a/internal/controllers/cli/cli.go
+++ b/internal/controllers/cli/cli.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"github.com/abelith/spellbook/internal/models"
 	"github.com/spf13/cobra"
+	"io"
 )
 
 type Application interface {
@@ -12,6 +13,7 @@ type Application interface {
 	GetSpells(ctx context.Context, query models.SearchQuery) ([]models.Spell, error)
 	DeleteSpell(ctx context.Context, spellName string) error
 	CastSpell(ctx context.Context, spellCast models.SpellCast) (models.CastResult, error)
+	ExportSpells(ctx context.Context, exp string, w io.Writer) error
 }
 
 type CLI struct {
@@ -24,6 +26,7 @@ func NewCLI(ver string, app Application) *CLI {
 		NewAddCommand(app),
 		NewRmCommand(app),
 		NewSearchCmd(app),
+		NewExportCmd(app),
 	)
 
 	return &CLI{
diff --git a/internal/controllers/cli/export.go b/internal/controllers/cli/export.go
new file mode 100644
index 0000000..234be49
--- /dev/null
+++ b/internal/controllers/cli/export.go
@@ -0,0 +1,52 @@
+package cli
+
+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
+}