From 153b5f17eb1973f3b37c2f51720dfc0b19fd64a7 Mon Sep 17 00:00:00 2001
From: Alejandro Mery <amery@jpi.io>
Date: Fri, 1 Sep 2023 22:43:36 +0000
Subject: [PATCH] decoder [WIP]

Signed-off-by: Alejandro Mery <amery@jpi.io>
---
 decoder.go       | 65 ++++++++++++++++++++++++++++++++++++++++++++++++
 decoder_error.go | 18 ++++++++++++++
 decoder_token.go | 14 +++++++++++
 3 files changed, 97 insertions(+)
 create mode 100644 decoder.go
 create mode 100644 decoder_error.go
 create mode 100644 decoder_token.go

diff --git a/decoder.go b/decoder.go
new file mode 100644
index 0000000..e5a1d9b
--- /dev/null
+++ b/decoder.go
@@ -0,0 +1,65 @@
+package ini
+
+import (
+	"bytes"
+	"io"
+	"strings"
+
+	"asciigoat.org/core"
+	"asciigoat.org/core/reflection"
+	"asciigoat.org/ini/parser"
+)
+
+// Decoder ...
+type Decoder struct {
+	io.Closer
+
+	r *reflection.Reflection
+	p *parser.Parser
+}
+
+// Decode ...
+func (dec *Decoder) Decode(v any) error {
+	defer dec.Close()
+
+	r, err := reflection.New(v)
+	if err != nil {
+		return err
+	}
+
+	dec.r = r
+	return dec.p.Run()
+}
+
+// NewDecoder creates a Decoder using the provided [io.Reader]
+// as source
+func NewDecoder(r io.Reader) *Decoder {
+	rc := core.NewReadCloser(r)
+	switch {
+	case rc == nil:
+		return nil
+	default:
+		dec := &Decoder{
+			p:      parser.NewParser(rc),
+			Closer: rc,
+		}
+		dec.init()
+		return dec
+	}
+}
+
+func (dec *Decoder) init() {
+	dec.p.OnToken = dec.parserOnToken
+	dec.p.OnError = dec.parserOnError
+}
+
+// NewDecoderBytes creates a Decoder using the provided bytes array
+// as source
+func NewDecoderBytes(b []byte) *Decoder {
+	return NewDecoder(bytes.NewReader(b))
+}
+
+// NewDecoderString creates a Decoder over a provided string of data
+func NewDecoderString(s string) *Decoder {
+	return NewDecoder(strings.NewReader(s))
+}
diff --git a/decoder_error.go b/decoder_error.go
new file mode 100644
index 0000000..c05f190
--- /dev/null
+++ b/decoder_error.go
@@ -0,0 +1,18 @@
+package ini
+
+import (
+	"log"
+
+	"asciigoat.org/core/lexer"
+)
+
+func (*Decoder) parserOnError(pos lexer.Position, content string, err error) error {
+	log.Printf("%s: %s %s: %q: %v", "ini", pos, "error:", content, err)
+
+	return &lexer.Error{
+		Line:    pos.Line,
+		Column:  pos.Column,
+		Content: content,
+		Err:     err,
+	}
+}
diff --git a/decoder_token.go b/decoder_token.go
new file mode 100644
index 0000000..6e06084
--- /dev/null
+++ b/decoder_token.go
@@ -0,0 +1,14 @@
+package ini
+
+import (
+	"log"
+
+	"asciigoat.org/core/lexer"
+	"asciigoat.org/ini/parser"
+)
+
+func (*Decoder) parserOnToken(pos lexer.Position, typ parser.TokenType, value string) error {
+	log.Printf("%s: %s %s %q", "ini", pos, typ, value)
+
+	return nil
+}