From 29dcf9acb98d1f4ebde3156ce7021b3b4e5d679c Mon Sep 17 00:00:00 2001
From: Anhgelus Morhtuuzh <william@herges.fr>
Date: Tue, 30 Sep 2025 16:55:03 +0200
Subject: feat(markdown): support external ref and test

---
 mardown/lexer.go      | 15 +++++++++++++++
 mardown/lexer_test.go | 22 ++++++++++++++++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 mardown/lexer_test.go

(limited to 'mardown')

diff --git a/mardown/lexer.go b/mardown/lexer.go
index a7b364d..42519e7 100644
--- a/mardown/lexer.go
+++ b/mardown/lexer.go
@@ -12,6 +12,8 @@ const (
 	lexerHeader   lexerType = "header"
 	lexerQuote    lexerType = "quote"
 
+	lexerExternal lexerType = "external"
+
 	lexerLiteral lexerType = "literal"
 )
 
@@ -38,6 +40,14 @@ func (l *lexers) Finished() bool {
 	return l.current+1 >= len(l.lexers)
 }
 
+func (l *lexers) String() string {
+	s := "Lexers["
+	for _, l := range l.lexers {
+		s += l.String() + " "
+	}
+	return s + "]"
+}
+
 func lex(s string) *lexers {
 	lxs := &lexers{current: -1}
 	var lexs []lexer
@@ -63,10 +73,15 @@ func lex(s string) *lexers {
 			fn(c, lexerHeader)
 		case '>':
 			fn(c, lexerQuote)
+		case '[', ']', '(', ')', '!':
+			fn(c, lexerExternal)
 		default:
 			fn(c, lexerLiteral)
 		}
 	}
+	if len(previous) > 0 {
+		lexs = append(lexs, lexer{Type: currentType, Value: previous})
+	}
 	lxs.lexers = lexs
 	return lxs
 }
diff --git a/mardown/lexer_test.go b/mardown/lexer_test.go
new file mode 100644
index 0000000..296e9b9
--- /dev/null
+++ b/mardown/lexer_test.go
@@ -0,0 +1,22 @@
+package mardown
+
+import "testing"
+
+func TestLex(t *testing.T) {
+	lxs := lex("bonjour les gens")
+	if lxs.String() != "Lexers[literal(bonjour les gens) ]" {
+		t.Errorf("invalid lex, got %s", lxs)
+	}
+	lxs = lex("# bonjour les gens")
+	if lxs.String() != "Lexers[header(#) literal( bonjour les gens) ]" {
+		t.Errorf("invalid lex, got %s", lxs)
+	}
+	lxs = lex("# bonjour les gens\nComment ça va ?")
+	if lxs.String() != "Lexers[header(#) literal( bonjour les gens) break(\n) literal(Comment ça va ?) ]" {
+		t.Errorf("invalid lex, got %s", lxs)
+	}
+	lxs = lex("**hey**, what's up?")
+	if lxs.String() != "Lexers[modifier(**) literal(hey) modifier(**) literal(, what's up?) ]" {
+		t.Errorf("invalid lex, got %s", lxs)
+	}
+}
-- 
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