refactor(markdown): create top layer type paragraph

1 files changed, 65 insertions, 0 deletions

diff --git a/mardown/ast_paragraph.go b/mardown/ast_paragraph.go
new file mode 100644
index 0000000..3ebc519
--- /dev/null
+++ b/mardown/ast_paragraph.go
@@ -0,0 +1,65 @@
+package mardown
+
+import (
+	"errors"
+	"html/template"
+)
+
+var (
+	ErrInvalidParagraph         = errors.New("invalid paragraph")
+	ErrInvalidCodeBlockPosition = errors.Join(ErrInvalidParagraph, errors.New("invalid code block position"))
+)
+
+type astParagraph struct {
+	content []block
+}
+
+func (a *astParagraph) Eval() (template.HTML, error) {
+	var content template.HTML
+	for _, c := range a.content {
+		ct, err := c.Eval()
+		if err != nil {
+			return "", err
+		}
+		content += ct
+	}
+	return content, nil
+}
+
+func paragraph(lxs lexers) (block, error) {
+	tree := new(astParagraph)
+	n := 0
+	lxs.current-- // because we do not use it before the next
+	for lxs.Next() && n < 2 {
+		switch lxs.Current().Type {
+		case lexerBreak:
+			n++
+		case lexerLiteral:
+			tree.content = append(tree.content, astLiteral(lxs.Current().Value))
+		case lexerModifier:
+			//TODO: handle
+		case lexerQuote:
+			//TODO: handle
+		case lexerEscape:
+			//TODO: handle
+		case lexerExternal:
+			//TODO: handle
+		case lexerCode:
+			if len(lxs.Current().Value) == 3 {
+				if n == 0 {
+					return nil, ErrInvalidCodeBlockPosition
+				}
+				lxs.current-- // because we do not use it before the next
+				return tree, nil
+			}
+			//TODO: handle
+		}
+	}
+	return tree, nil
+}
+
+type astLiteral string
+
+func (a astLiteral) Eval() (template.HTML, error) {
+	return template.HTML(template.HTMLEscapeString(string(a))), nil
+}