src/main/kotlin/net/pterodactylus/sone/freenet/wot/IdentityLoader.kt

   1 /*
   2  * Sone - IdentityLoader.java - Copyright © 2013–2019 David Roden
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.pterodactylus.sone.freenet.wot
  19
  20 import com.google.common.base.*
  21 import com.google.inject.*
  22 import net.pterodactylus.sone.freenet.plugin.*
  23 import java.util.concurrent.TimeUnit.*
  24 import java.util.logging.*
  25
  26 /**
  27  * Loads [OwnIdentity]s and the [Identity]s they trust.
  28  */
  29 class IdentityLoader @Inject constructor(private val webOfTrustConnector: WebOfTrustConnector, private val context: Context? = null) {
  30
  31         private val logger: Logger = Logger.getLogger(IdentityLoader::class.java.name)
  32
  33         @Throws(WebOfTrustException::class)
  34         fun loadIdentities() =
  35                         time({ stopwatch, identities -> "Loaded ${identities.size} own identities in ${stopwatch.elapsed(MILLISECONDS) / 1000.0}s." }) {
  36                                 webOfTrustConnector.loadAllOwnIdentities()
  37                         }.let(this::loadTrustedIdentitiesForOwnIdentities)
  38
  39         @Throws(PluginException::class)
  40         private fun loadTrustedIdentitiesForOwnIdentities(ownIdentities: Collection<OwnIdentity>) =
  41                         ownIdentities.associateWith { ownIdentity ->
  42                                 if (ownIdentity.doesNotHaveCorrectContext()) {
  43                                         emptySet()
  44                                 } else {
  45                                         time({ stopwatch, identities -> "Loaded ${identities.size} identities for ${ownIdentity.nickname} in ${stopwatch.elapsed(MILLISECONDS) / 1000.0}s." }) {
  46                                                 webOfTrustConnector.loadTrustedIdentities(ownIdentity, context?.context)
  47                                         }
  48                                 }
  49                         }
  50
  51         private fun OwnIdentity.doesNotHaveCorrectContext() =
  52                         context?.let { it.context !in contexts } ?: false
  53
  54         private fun <R> time(logMessage: (Stopwatch, R) -> String, loader: () -> R) =
  55                         Stopwatch.createStarted().let { stopwatch ->
  56                                 loader().also { logger.fine(logMessage(stopwatch, it)) }
  57                         }
  58
  59 }