refactor: Decompose list func

pkg/inventory/config.go

@@ -0,0 +1,5 @@
+package inventory
+
+type MetadataConfig struct {
+	Metadata string
+}

pkg/inventory/find.go

@@ -0,0 +1,11 @@
+package inventory
+
+import "archive/tar"
+
+func Find(
+	state MetadataConfig,
+
+	expression string,
+) ([]*tar.Header, error) {
+	return nil, nil
+}

pkg/inventory/inventory.go

@@ -1,19 +0,0 @@
-package inventory
-
-import "archive/tar"
-
-type MetadataConfig struct {
-	Metadata string
-}
-
-func Find(
-	state MetadataConfig,
-
-	expression string,
-) ([]*tar.Header, error)
-
-func List(
-	state MetadataConfig,
-
-	name string,
-) ([]*tar.Header, error)

pkg/inventory/list.go

@@ -0,0 +1,48 @@
+package inventory
+
+import (
+	"archive/tar"
+	"context"
+
+	"github.com/pojntfx/stfs/internal/converters"
+	"github.com/pojntfx/stfs/internal/formatting"
+	"github.com/pojntfx/stfs/internal/persisters"
+)
+
+func List(
+	state MetadataConfig,
+
+	name string,
+) ([]*tar.Header, error) {
+	metadataPersister := persisters.NewMetadataPersister(state.Metadata)
+	if err := metadataPersister.Open(); err != nil {
+		return []*tar.Header{}, err
+	}
+
+	dbHdrs, err := metadataPersister.GetHeaderDirectChildren(context.Background(), name)
+	if err != nil {
+		return []*tar.Header{}, err
+	}
+
+	headers := []*tar.Header{}
+	for i, dbhdr := range dbHdrs {
+		if i == 0 {
+			if err := formatting.PrintCSV(formatting.TARHeaderCSV); err != nil {
+				return []*tar.Header{}, err
+			}
+		}
+
+		hdr, err := converters.DBHeaderToTarHeader(dbhdr)
+		if err != nil {
+			return []*tar.Header{}, err
+		}
+
+		if err := formatting.PrintCSV(formatting.GetTARHeaderAsCSV(dbhdr.Record, dbhdr.Block, hdr)); err != nil {
+			return []*tar.Header{}, err
+		}
+
+		headers = append(headers, hdr)
+	}
+
+	return headers, nil
+}