snapshot of https://github.com/cortezaproject/corteza.git (2024.9.x, 2026-09-18; blobs > 131072B omitted)

server/pkg/envoy/directory/decode.go

@@ -0,0 +1,91 @@
+package directory
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"os"
+	"path"
+	"path/filepath"
+
+	"github.com/cortezaproject/corteza/server/pkg/envoy"
+	"github.com/cortezaproject/corteza/server/pkg/envoy/resource"
+)
+
+type (
+	Decoder interface {
+		CanDecodeExt(string) bool
+		CanDecodeFile(io.Reader) bool
+		Decode(context.Context, io.Reader, *envoy.DecoderOpts) ([]resource.Interface, error)
+	}
+)
+
+// DecodeDirectory is a helper to run the decoding process over the entire directory
+func Decode(ctx context.Context, p string, decoders ...Decoder) ([]resource.Interface, error) {
+	var (
+		f *os.File
+
+		// decoded nodes
+		dnn []resource.Interface
+
+		// agregated resources
+		nn = make([]resource.Interface, 0, 100)
+	)
+
+	if len(decoders) == 0 {
+		return nil, fmt.Errorf("no decoders provided")
+	}
+
+	return nn, filepath.Walk(p, func(p string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+
+		if info.IsDir() {
+			return nil
+		}
+
+		if f, err = os.Open(p); err != nil {
+			return err
+		}
+		defer f.Close()
+
+		for _, d := range decoders {
+			if !d.CanDecodeFile(f) {
+				// decoder cannot handle this file
+				// Make sure to reset it, as the above check consumes the reader
+				if _, err = f.Seek(0, 0); err != nil {
+					return err
+				}
+
+				continue
+			}
+
+			if !d.CanDecodeExt(info.Name()) {
+				// this decoder cannot handle this extension
+				continue
+			}
+
+			if _, err = f.Seek(0, 0); err != nil {
+				return err
+			}
+
+			dir, fn := path.Split(p)
+			do := &envoy.DecoderOpts{
+				Name: fn,
+				Path: dir,
+			}
+
+			if dnn, err = d.Decode(ctx, f, do); err != nil {
+				return fmt.Errorf("failed to decode %s: %w", info.Name(), err)
+			}
+
+			nn = append(nn, dnn...)
+
+			// found compatible decoder
+			return nil
+		}
+
+		return nil
+	})
+}