feat: args func to pass multiple arguments to templates

templates/templates.go

@@ -2,15 +2,36 @@ package templates
 
 import (
 	"embed"
+	"errors"
+	"fmt"
 	"html/template"
 )
 
-//go:embed *.html test/*.html
+//go:embed *.html layouts/*.html
 var embedded embed.FS
 
-var temps = template.Must(template.ParseFS(embedded,
+var temps = template.Must(template.New("templates").Funcs(template.FuncMap{
+	"args": func(pairs ...any) (map[string]any, error) {
+		if len(pairs)%2 != 0 {
+			return nil, errors.New("misaligned map in template arguments")
+		}
+
+		m := make(map[string]any, len(pairs)/2)
+
+		for i := 0; i < len(pairs); i += 2 {
+			key, ok := pairs[i].(string)
+			if !ok {
+				return nil, fmt.Errorf("cannot use type %T as map key", pairs[i])
+			}
+
+			m[key] = pairs[i+1]
+		}
+
+		return m, nil
+	},
+}).ParseFS(embedded,
 	"*.html",
-	"test/*.html",
+	"layouts/*.html",
 ))
 
 func Templates() *template.Template {