feat: implement paragraph and italic parsers (#1725)

plugin/gomark/parser/italic.go

@@ -0,0 +1,42 @@
+package parser
+
+import "github.com/usememos/memos/plugin/gomark/parser/tokenizer"
+
+type ItalicParser struct {
+	ContentTokens []*tokenizer.Token
+}
+
+func NewItalicParser() *ItalicParser {
+	return &ItalicParser{}
+}
+
+func (*ItalicParser) Match(tokens []*tokenizer.Token) *ItalicParser {
+	if len(tokens) < 3 {
+		return nil
+	}
+
+	prefixTokens := tokens[:1]
+	if prefixTokens[0].Type != tokenizer.Star && prefixTokens[0].Type != tokenizer.Underline {
+		return nil
+	}
+	prefixTokenType := prefixTokens[0].Type
+	contentTokens := []*tokenizer.Token{}
+	matched := false
+	for _, token := range tokens[1:] {
+		if token.Type == tokenizer.Newline {
+			return nil
+		}
+		if token.Type == prefixTokenType {
+			matched = true
+			break
+		}
+		contentTokens = append(contentTokens, token)
+	}
+	if !matched || len(contentTokens) == 0 {
+		return nil
+	}
+
+	return &ItalicParser{
+		ContentTokens: contentTokens,
+	}
+}