feat: rewriter layer

internal/rule/http/option.go

@@ -0,0 +1,42 @@
+package http
+
+import (
+	"net/http"
+
+	"forge.cadoles.com/cadoles/bouncer/internal/rule"
+	"github.com/expr-lang/expr"
+)
+
+func WithRequestFuncs(r *http.Request) rule.OptionFunc {
+	return func(opts *rule.Options) {
+		funcs := []expr.Option{
+			setRequestURL(r),
+			setRequestHeaderFunc(r),
+			addRequestHeaderFunc(r),
+			delRequestHeadersFunc(r),
+			setRequestHostFunc(r),
+		}
+
+		if len(opts.Expr) == 0 {
+			opts.Expr = make([]expr.Option, 0)
+		}
+
+		opts.Expr = append(opts.Expr, funcs...)
+	}
+}
+
+func WithResponseFuncs(r *http.Response) rule.OptionFunc {
+	return func(opts *rule.Options) {
+		funcs := []expr.Option{
+			setResponseHeaderFunc(r),
+			addResponseHeaderFunc(r),
+			delResponseHeadersFunc(r),
+		}
+
+		if len(opts.Expr) == 0 {
+			opts.Expr = make([]expr.Option, 0)
+		}
+
+		opts.Expr = append(opts.Expr, funcs...)
+	}
+}