SecurityContext

import bolster.security.{ Permission, SecurityContext, UserContext }

import scala.collection.concurrent.TrieMap

object SecureCache:
 // Define permissions to read and write cache entries
 private val getPermission = Permission("cache:get")
 private val putPermission = Permission("cache:put")

 private val cache = TrieMap[String, String](
   "gang starr"      -> "step in the arena",
   "digable planets" -> "blowout comb"
 )

 def get(key: String)(using security: SecurityContext): String =
   // Test for read permission before getting cache entry
   security(getPermission) { cache(key) }

 def put(key: String, value: String)(using security: SecurityContext): Unit =
   // Test for write permission before putting cache entry
   security(putPermission) { cache += key -> value }

// Set security context to include read permission
given SecurityContext = UserContext(Permission("cache:get"))

// Get cache entry
val classic = SecureCache.get("gang starr")

// Throw SecurityViolation because write permission is not granted
SecureCache.put("sucker mc", classic)