1 files changed, 79 insertions, 0 deletions
diff --git a/internal/tailwind/transformer.go b/internal/tailwind/transformer.go
new file mode 100644
index 0000000..c9da9df
--- /dev/null
+++ b/internal/tailwind/transformer.go
@@ -0,0 +1,79 @@
+package tailwind
+
+import (
+	"bytes"
+	"fmt"
+
+	"github.com/yuin/goldmark/ast"
+	"github.com/yuin/goldmark/parser"
+	"github.com/yuin/goldmark/text"
+)
+
+type TailwindTransformer struct{}
+
+func (t *TailwindTransformer) Transform(node *ast.Document, reader text.Reader, pc parser.Context) {
+	ast.Walk(node, func(n ast.Node, entering bool) (ast.WalkStatus, error) {
+		if !entering {
+			return ast.WalkContinue, nil
+		}
+
+		switch node := n.(type) {
+		case *ast.Heading:
+			classes := map[int]string{
+				1: "font-gentium text-4xl font-bold text-main-hard mb-3 tracking-[.0125rem]",
+				2: "font-gentium text-3xl font-bold text-main-hard mb-1 tracking-[.0125rem]",
+				3: "font-gentium text-2xl font-medium text-main-hard mb-0.8 tracking-[.0125rem]",
+				4: "font-gentium text-xl font-medium text-main-medium mb-0.5 tracking-[.0125rem]",
+				5: "font-gentium text-base font-medium text-main-medium mb-0.5 italic tracking-[.0125rem]",
+				6: "font-gentium text-base font-medium text-secondary mb-0.5",
+			}
+			if class, ok := classes[node.Level]; ok {
+				node.SetAttribute([]byte("class"), []byte(class))
+			}
+
+		case *ast.Paragraph:
+			node.SetAttribute([]byte("class"), []byte("text-base/[2] font-gentium tracking-[.0125rem] -indent-8 ml-4 mb-8"))
+
+		case *ast.List:
+			if node.IsOrdered() {
+				node.SetAttribute([]byte("class"), []byte("list-decimal list-inside space-y-2 mb-4 pl-8"))
+			} else {
+				node.SetAttribute([]byte("class"), []byte("list-disc list-inside space-y-2 mb-4 pl-8"))
+			}
+
+		case *ast.ListItem:
+			node.SetAttribute([]byte("class"), []byte("text-base/[2] font-gentium tracking-[.0125rem]"))
+
+		case *ast.Blockquote:
+			node.SetAttribute([]byte("class"), []byte("border-l-2 border-main-medium bg-paper bg-background-dark p-1 mb-2 italic font-thin"))
+
+		case *ast.CodeSpan:
+			node.SetAttribute([]byte("class"), []byte("bg-paper bg-background-dark"))
+
+		case *ast.CodeBlock, *ast.FencedCodeBlock:
+			node.SetAttribute([]byte("class"), []byte("bg-paper bg-background-dark p-1 rounded-lg overflow-x-auto mb-4"))
+
+		case *ast.Link:
+			if bytes.HasPrefix(node.Destination, []byte{'.', '/'}) {
+				onclickAttr := fmt.Appendf(make([]byte, 0, 21+len(node.Destination)), "return changeUrl('%s');", node.Destination)
+				node.SetAttribute([]byte("onclick"), onclickAttr)
+			}
+			node.SetAttribute([]byte("class"), []byte("text-secondary hover:text-main-hard underline"))
+
+		case *ast.Image:
+			node.SetAttribute([]byte("class"), []byte("max-w-full h-auto rounded-lg shadow-lg mb-4"))
+
+		case *ast.Emphasis:
+			switch node.Level {
+			case 1:
+				node.SetAttribute([]byte("class"), []byte("italic font-thin"))
+			case 2:
+				node.SetAttribute([]byte("class"), []byte("font-bold"))
+			case 3:
+				node.SetAttribute([]byte("class"), []byte("italic font-bold"))
+			}
+		}
+
+		return ast.WalkContinue, nil
+	})
+}