1 files changed, 63 insertions, 0 deletions
diff --git a/parser.go b/parser.go
new file mode 100644
index 0000000..054e906
--- /dev/null
+++ b/parser.go
@@ -0,0 +1,63 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"strconv"
+	"strings"
+)
+
+func parseRESP(reader *bufio.Reader) ([]string, error) {
+	line, err := reader.ReadString('\n')
+	if err != nil {
+		return nil, err
+	}
+
+	if len(line) == 0 {
+		return nil, fmt.Errorf("empty line")
+	}
+
+	switch line[0] {
+	case '*':
+		var args []string
+		argC, _ := strconv.Atoi(strings.TrimSpace(line[1:]))
+
+		for i := 0; i < argC; i++ {
+			nestedArgs, err := parseRESP(reader)
+			if err != nil {
+				return nil, err
+			}
+
+			args = append(args, nestedArgs...)
+		}
+		return args, nil
+	case '$':
+		strLen, _ := strconv.Atoi(strings.TrimSpace(line[1:]))
+
+		if strLen == -1 {
+			return []string{""}, nil
+		}
+
+		buf := make([]byte, strLen)
+
+		_, err = io.ReadFull(reader, buf)
+		if err != nil {
+			return nil, err
+		}
+
+		_, err = reader.Discard(2)
+		if err != nil {
+			return nil, err
+		}
+
+		return []string{string(buf)}, nil
+	case '+':
+		cleanStr := strings.TrimSpace(line[1:])
+		return []string{cleanStr}, nil
+	case ':':
+		return []string{strings.TrimSpace(line[1:])}, nil
+	default:
+		return nil, fmt.Errorf("unknown command type: %c", line[0])
+	}
+}
+\ No newline at end of file