From 7490e2c1c2686e5de165965d5d6bbaf61a1894c8 Mon Sep 17 00:00:00 2001
From: Silvan Jegen <s.jegen@gmail.com>
Date: Fri, 20 Jan 2017 11:44:41 +0100
Subject: Return module description

For now it's mostly key-value pairs but it will most likely have to get
more complex because of the if-statements.
---
 conf/parser.go | 37 +++++++++++++++++++++++++++----------
 1 file changed, 27 insertions(+), 10 deletions(-)

(limited to 'conf')

diff --git a/conf/parser.go b/conf/parser.go
index b22e6aa..dfaa8dc 100644
--- a/conf/parser.go
+++ b/conf/parser.go
@@ -32,6 +32,11 @@ type parser struct {
 	cur  token
 }
 
+type moduledesc struct {
+	name      string
+	keyvalues map[string]string
+}
+
 func newParser(s *scanner) *parser {
 	p := &parser{
 		s: *s,
@@ -48,7 +53,8 @@ func NewConfig(r io.Reader) *Config {
 }
 
 func (p *parser) startparsing() {
-	p.module("input")
+	mdesc := p.module("input")
+	fmt.Fprintf(os.Stderr, "moduledesc: %#v\n", mdesc)
 
 	p.module("filter")
 
@@ -65,7 +71,9 @@ func (p *parser) advanceOneToken(place string) {
 	fmt.Fprintf(os.Stderr, "tokentype: %v, token: %q\n", p.cur.Type, p.cur.Lit)
 }
 
-func (p *parser) module(firstname string) {
+func (p *parser) module(firstname string) *moduledesc {
+	ret := moduledesc{keyvalues: make(map[string]string)}
+
 	p.advanceOneToken("module")
 
 	if p.cur.Lit != firstname {
@@ -81,16 +89,21 @@ func (p *parser) module(firstname string) {
 	if p.cur.Type != Name {
 		fmt.Fprintf(os.Stderr, "error when parsing module. We were expecting another name but got %q at line %d offset %d.\n", p.cur.Lit, p.cur.LineNr, p.cur.Offset)
 	}
-	p.object()
+	ret.name = p.cur.Lit
+
+	ret.keyvalues = p.object(ret.keyvalues)
 
 	p.advanceOneToken("module")
 	if p.cur.Lit[0] != '}' {
 		fmt.Fprintf(os.Stderr, "error when parsing module. Was expecting a closing bracket but got %s at line %d offset %d.\n", p.cur.Lit, p.cur.LineNr, p.cur.Offset)
 	}
 
+	return &ret
 }
 
-func (p *parser) object() {
+func (p *parser) object(kv map[string]string) map[string]string {
+	var more bool
+
 	p.advanceOneToken("object")
 
 	if p.cur.Lit[0] != '{' {
@@ -99,24 +112,27 @@ func (p *parser) object() {
 	// hack to deal with case where there is no white space between
 	// the delimiters.
 	if p.cur.Lit == "{}" {
-		return
+		return kv
 	}
 
 	for {
-		more := p.keyvalue()
+		more, kv = p.keyvalue(kv)
 		if !more {
 			break
 		}
 	}
+
+	return kv
 }
 
-func (p *parser) keyvalue() bool {
+func (p *parser) keyvalue(kv map[string]string) (bool, map[string]string) {
 	p.advanceOneToken("keyvalue")
 
 	fmt.Fprintf(os.Stderr, "keyvalue: tokentype: %v, token: %q\n", p.cur.Type, p.cur.Lit)
 	if p.cur.Type != Literal {
 		fmt.Fprintf(os.Stderr, "error when parsing keyvalue. Was expecting a name but got %q at line %d offset %d.\n", p.cur.Lit, p.cur.LineNr, p.cur.Offset)
 	}
+	lhs := p.cur.Lit
 
 	p.advanceOneToken("keyvalue")
 	if p.cur.Lit != "=>" {
@@ -127,18 +143,19 @@ func (p *parser) keyvalue() bool {
 	if p.cur.Type != Literal && p.cur.Type != Name {
 		fmt.Fprintf(os.Stderr, "error when parsing keyvalue. Was expecting a literal or a name but got %q at line %d offset %d.\n", p.cur.Lit, p.cur.LineNr, p.cur.Offset)
 	}
+	kv[lhs] = p.cur.Lit
 
 	tok, err := p.s.Peek()
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "error when parsing keyvalue. Got an error when checking if there are more keyvalues: %v.\n", err)
-		return false
+		return false, kv
 	}
 
 	fmt.Fprintf(os.Stderr, "peeked %q (type %v) at line %d offset %d.\n", tok.Lit, tok.Type, tok.LineNr, tok.Offset)
 	if tok.Type == ObjectClose {
 		p.advanceOneToken("keyvaluelast")
-		return false
+		return false, kv
 	}
 
-	return true
+	return true, kv
 }
-- 
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