initial commit

internal/www/page.go

@@ -0,0 +1,34 @@
+package www
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+
+	"helix-proxy/internal/config"
+)
+
+// LoadPage returns HTML for name (e.g. "index.html", "404.html").
+// A file in WWW_DIR with the same name overrides the embedded default.
+// Placeholders use the form {{KEY}} and are replaced from vars.
+func LoadPage(name string, vars map[string]string) []byte {
+	wwwDir := config.Resolve("www")
+	customPath := filepath.Join(wwwDir, name)
+
+	data, err := os.ReadFile(customPath)
+	if err != nil {
+		data, err = defaults.ReadFile(name)
+		if err != nil {
+			return nil
+		}
+	}
+
+	if len(vars) == 0 {
+		return data
+	}
+	s := string(data)
+	for k, v := range vars {
+		s = strings.ReplaceAll(s, "{{"+k+"}}", v)
+	}
+	return []byte(s)
+}