From 6f154447710aec8ebbc774483c66f13a8f8ba883 Mon Sep 17 00:00:00 2001
From: Mark Sagi-Kazar <mark.sagikazar@gmail.com>
Date: Wed, 23 Sep 2020 16:45:59 +0200
Subject: [PATCH] feat(encoding): Add hcl codec

Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>
---
 internal/encoding/hcl/codec.go | 40 ++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 internal/encoding/hcl/codec.go

diff --git a/internal/encoding/hcl/codec.go b/internal/encoding/hcl/codec.go
new file mode 100644
index 0000000..f3e4ab1
--- /dev/null
+++ b/internal/encoding/hcl/codec.go
@@ -0,0 +1,40 @@
+package hcl
+
+import (
+	"bytes"
+	"encoding/json"
+
+	"github.com/hashicorp/hcl"
+	"github.com/hashicorp/hcl/hcl/printer"
+)
+
+// Codec implements the encoding.Encoder and encoding.Decoder interfaces for HCL encoding.
+// TODO: add printer config to the codec?
+type Codec struct{}
+
+func (Codec) Encode(v interface{}) ([]byte, error) {
+	b, err := json.Marshal(v)
+	if err != nil {
+		return nil, err
+	}
+
+	// TODO: use printer.Format? Is the trailing newline an issue?
+
+	ast, err := hcl.Parse(string(b))
+	if err != nil {
+		return nil, err
+	}
+
+	var buf bytes.Buffer
+
+	err = printer.Fprint(&buf, ast.Node)
+	if err != nil {
+		return nil, err
+	}
+
+	return buf.Bytes(), nil
+}
+
+func (Codec) Decode(b []byte, v interface{}) error {
+	return hcl.Unmarshal(b, v)
+}