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

   1 /*
   2  * Sone - IdentityLoader.kt - Copyright © 2013–2020 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 loadTrustedIdentities() =
  35                         time({ stopwatch, identities -> "Loaded ${identities.size} own identities in ${stopwatch.elapsed(MILLISECONDS) / 1000.0}s." }) {
  36                                 webOfTrustConnector.loadAllOwnIdentities()
  37                         }.let(this::loadTrustedIdentitiesForOwnIdentities)
  38                                         .mergeRemoteIdentities()
  39
  40         fun loadAllIdentities() =
  41                         time({ stopwatch, identities -> "Loaded ${identities.size} own identities in ${stopwatch.elapsed(MILLISECONDS) / 1000.0}s." }) {
  42                                 webOfTrustConnector.loadAllOwnIdentities()
  43                         }.let(this::loadAllIdentitiesForOwnIdentities)
  44                                         .mergeRemoteIdentities()
  45
  46         @Throws(PluginException::class)
  47         private fun loadTrustedIdentitiesForOwnIdentities(ownIdentities: Collection<OwnIdentity>) =
  48                         ownIdentities
  49                                         .also { logger.fine { "Getting trusted identities for ${it.size} own identities..." } }
  50                                         .associateWith { ownIdentity ->
  51                                                 logger.fine { "Getting trusted identities for $ownIdentity..." }
  52                                                 if (ownIdentity.doesNotHaveCorrectContext()) {
  53                                                         logger.fine { "Skipping $ownIdentity because of incorrect context." }
  54                                                         emptySet()
  55                                                 } else {
  56                                                         logger.fine { "Loading trusted identities for $ownIdentity from WoT..." }
  57                                                         time({ stopwatch, identities -> "Loaded ${identities.size} identities for ${ownIdentity.nickname} in ${stopwatch.elapsed(MILLISECONDS) / 1000.0}s." }) {
  58                                                                 webOfTrustConnector.loadTrustedIdentities(ownIdentity, context?.context)
  59                                                         }
  60                                                 }
  61                                         }
  62
  63         private fun loadAllIdentitiesForOwnIdentities(ownIdentities: Collection<OwnIdentity>) =
  64                         ownIdentities
  65                                         .also { logger.fine { "Getting trusted identities for ${it.size} own identities..." } }
  66                                         .associateWith { ownIdentity ->
  67                                                 logger.fine { "Getting trusted identities for $ownIdentity..." }
  68                                                 if (ownIdentity.doesNotHaveCorrectContext()) {
  69                                                         logger.fine { "Skipping $ownIdentity because of incorrect context." }
  70                                                         emptySet()
  71                                                 } else {
  72                                                         logger.fine { "Loading trusted identities for $ownIdentity from WoT..." }
  73                                                         time({ stopwatch, identities -> "Loaded ${identities.size} identities for ${ownIdentity.nickname} in ${stopwatch.elapsed(MILLISECONDS) / 1000.0}s." }) {
  74                                                                 webOfTrustConnector.loadAllIdentities(ownIdentity, context?.context)
  75                                                         }
  76                                                 }
  77                                         }
  78
  79         private fun OwnIdentity.doesNotHaveCorrectContext() =
  80                         context?.let { it.context !in contexts } ?: false
  81
  82         private fun <R> time(logMessage: (Stopwatch, R) -> String, loader: () -> R) =
  83                         Stopwatch.createStarted().let { stopwatch ->
  84                                 loader().also { logger.fine(logMessage(stopwatch, it)) }
  85                         }
  86
  87         private fun Map<OwnIdentity, Set<Identity>>.mergeRemoteIdentities() =
  88                         values.flatten()
  89                                         .groupBy { it.id }
  90                                         .mapValues {
  91                                                 it.value.reduce { accIdentity, identity ->
  92                                                         identity.trust.forEach { (ownIdentity, trust) -> accIdentity.setTrust(ownIdentity, trust) }
  93                                                         accIdentity
  94                                                 }
  95                                         }
  96                                         .let { reducedIdentities ->
  97                                                 mapValues { it.value.map { identity -> reducedIdentities[identity.id]!! }.toSet() }
  98                                         }
  99
 100 }