Add RuleDump

Author: wcurrie

src/main/scala/io/github/binaryfoo/firewall/cp/RuleDump.scala

@@ -0,0 +1,26 @@
+package io.github.binaryfoo.firewall.cp
+
+import io.github.binaryfoo.firewall.cp.rules._
+
+object RuleDump {
+  def toString(rule: FwrValue, buf: StringBuilder = new StringBuilder(), indent: String = ""): String = {
+    rule match {
+      case FwrObject(tag, values) =>
+        buf.append(indent).append("(").append(tag).append(":")
+        values match {
+          case List(v: FwrLiteral) => buf.append(" ").append(v)
+          case List(v: FwrAddressRange) => buf.append(" ").append(v)
+          case List(v: FwrTableRef) => buf.append(" ").append(v)
+          case _ =>
+            for (value <- values) {
+              buf.append("\n")
+              toString(value, buf, indent + "  ")
+            }
+        }
+        buf.append(")")
+      case other =>
+        buf.append(indent).append(rule)
+    }
+    buf.toString()
+  }
+}