saving the lexer

cmd/main.go

@@ -3,12 +3,11 @@ package main
 import (
 	"log"
 
-	"github.com/therealfakemoot/obsidian-parser"
+	"github.com/therealfakemoot/wikilinks-parser/lexer"
 )
 
 func main() {
-	l, tokens := lexer.Lex("[[foo/bar/butts.png]]")
-	go l.Run()
+	_, tokens := lexer.Lex(`[[foo/bar/butts.png]]`)
 	for t := range tokens {
 		log.Printf("%#v\n", t)
 	}

go.mod

@@ -1,3 +1,3 @@
-module github.com/therealfakemoot/obsidian-parser
+module github.com/therealfakemoot/wikilinks-parser
 
 go 1.19

lexer/lexer.go

@@ -6,10 +6,21 @@ import (
 	"strings"
 )
 
-type Token struct {
-	Raw string
-}
+type Token int
+
+const (
+	LinkBeginToken = iota
+	LinkEndToken
+	LinkTextToken
+	LinkAliasBeginToken
+	LinkAliasTextToken
+	LinkSectionBeginToken
+	LinkSectionTextToken
+	LinkBlockBeginToken
+	LinkBlockTextToken
+)
 
+/*
 var (
 	LinkBeginToken        = Token{Raw: "[["}
 	LinkEndToken          = Token{Raw: "]]"}
@@ -21,10 +32,12 @@ var (
 	LinkBlockBeginToken   = Token{Raw: "^"}
 	LinkBlockTextToken    = Token{}
 )
+*/
 
 type Lexer struct {
 	input  []string
 	pos    int
+	link   bool
 	Tokens chan Token
 }
 
@@ -79,13 +92,24 @@ func (l *Lexer) Run() {
 		}
 
 		if s == "[" && l.Peek() == "[" {
+			l.link = true
 			l.Next()
 			l.Emit(LinkBeginToken)
+
+			switch s {
+			case "|":
+				l.Emit(LinkAliasBeginToken)
+			case "#":
+				l.Emit(LinkSectionBeginToken)
+			case "^":
+				l.Emit(LinkBlockBeginToken)
 			}
 
 			if s == "]" && l.Peek() == "]" {
+				l.link = false
 				l.Next()
-			l.Emit(LinkBeginToken)
+				l.Emit(LinkEndToken)
+			}
 		}
 
 	}

lexer/lexer_test.go

@@ -4,20 +4,40 @@ import (
 	"testing"
 )
 
-func Test_Lexer(t *testing.T) {
+func Test_LexerSimple(t *testing.T) {
 	tt := []string{
-		"[[Regular Link]]",
-		/*
-			"![[Transcluded Link]]",
-			"[[Regular Link|Alias]]",
-			"[[Regular Link#Subsection of page]]",
-			"[[Regular Link^link to block]]",
-			"[[Regular Link#Subsection of page|Alias]]",
-			"[[Regular Link^link to block|Alias]]",
-			"[[Regular Link\|Alias]]",
-			"[[Regular Link^link to block\|Alias]]",
-			"[[Regular Link#Subsection of page\|Alias]]",
-		*/
+		"[[",
+		"]]",
+		"[[foo]]",
+		"[[foo]]",
+		"[[foo|bar]]",
+	}
+
+	for _, tc := range tt {
+		t.Run(tc, func(t *testing.T) {
+			t.Logf("checking %q", tc)
+			_, tokens := Lex(tc)
+			for tok := range tokens {
+				t.Logf("found token: %#v", tok)
+			}
+		})
+	}
+}
+
+/*
+
+func Test_LexerFull(t *testing.T) {
+	tt := []string{
+		`[[Regular Link]]`,
+		`![[Transcluded Link]]`,
+		`[[Regular Link|Alias]]`,
+		`[[Regular Link#Subsection of page]]`,
+		`[[Regular Link^link to block]]`,
+		`[[Regular Link#Subsection of page|Alias]]`,
+		`[[Regular Link^link to block|Alias]]`,
+		`[[Regular Link\|Alias]]`,
+		`[[Regular Link^link to block\|Alias]]`,
+		`[[Regular Link#Subsection of page\|Alias]]`,
 	}
 
 		for _, tc := range tt {
@@ -27,3 +47,4 @@ func Test_Lexer(t *testing.T) {
 	}
 
 }
+*/

test-cases

@@ -1,10 +0,0 @@
-[[Regular Link]]
-![[Transcluded Link]]
-[[Regular Link|Alias]]
-[[Regular Link#Subsection of page]]
-[[Regular Link^link to block]]
-[[Regular Link#Subsection of page|Alias]]
-[[Regular Link^link to block|Alias]]
-[[Regular Link\|Alias]]
-[[Regular Link^link to block\|Alias]]
-[[Regular Link#Subsection of page\|Alias]]