feat: Add makeMaybe method to SslContextModule (#183)

Author: jakubjanecek

ssl-config/src/main/scala/com/avast/sst/ssl/SslContextModule.scala

@@ -1,6 +1,7 @@
 package com.avast.sst.ssl
 
 import cats.effect.Sync
+import cats.syntax.functor._
 import com.typesafe.config.{Config, ConfigFactory}
 import com.typesafe.sslconfig.ssl.{
   ConfigSSLContextBuilder,
@@ -12,6 +13,8 @@ import javax.net.ssl.{KeyManagerFactory, SSLContext, TrustManagerFactory}
 
 object SslContextModule {
 
+  private val SslContextEnabledKey = "enabled"
+
   /** Initializes [[javax.net.ssl.SSLContext]] from the provided config.
     *
     * @param withReference Whether we should use reference config of "ssl-config" library as well.
@@ -27,6 +30,22 @@ object SslContextModule {
     ).build
   }
 
+  /** Initializes [[javax.net.ssl.SSLContext]] from the provided config if it is enabled.
+    *
+    * Expects a boolean value `enabled` at the root of the provided [[com.typesafe.config.Config]]
+    * which determines whether to initialize the context or not.
+    *
+    * @param withReference Whether we should use reference config of "ssl-config" library as well.
+    */
+  def makeMaybe[F[_]: Sync](config: Config, withReference: Boolean = true): F[Option[SSLContext]] = {
+    if (config.hasPath(SslContextEnabledKey) && config.getBoolean(SslContextEnabledKey)) {
+      make(config, withReference).map(Some(_))
+    } else {
+      Sync[F].delay(None)
+    }
+
+  }
+
   private def referenceConfigUnsafe(): Config = ConfigFactory.defaultReference().getConfig("ssl-config")
 
 }