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[Sone.git] / src / main / kotlin / net / pterodactylus / sone / freenet / wot / IdentityLoader.kt

diff --git a/src/main/kotlin/net/pterodactylus/sone/freenet/wot/IdentityLoader.kt b/src/main/kotlin/net/pterodactylus/sone/freenet/wot/IdentityLoader.kt
new file mode 100644 (file)
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+++ b/src/main/kotlin/net/pterodactylus/sone/freenet/wot/IdentityLoader.kt
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+/*
+ * Sone - IdentityLoader.java - Copyright © 2013–2019 David Roden
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.pterodactylus.sone.freenet.wot
+
+import com.google.common.base.*
+import com.google.inject.*
+import net.pterodactylus.sone.freenet.plugin.*
+import java.util.concurrent.TimeUnit.*
+import java.util.logging.*
+
+/**
+ * Loads [OwnIdentity]s and the [Identity]s they trust.
+ */
+class IdentityLoader @Inject constructor(private val webOfTrustConnector: WebOfTrustConnector, private val context: Context? = null) {
+
+       private val logger: Logger = Logger.getLogger(IdentityLoader::class.java.name)
+
+       @Throws(WebOfTrustException::class)
+       fun loadIdentities() =
+                       time({ stopwatch, identities -> "Loaded ${identities.size} own identities in ${stopwatch.elapsed(MILLISECONDS) / 1000.0}s." }) {
+                               webOfTrustConnector.loadAllOwnIdentities()
+                       }.let(this::loadTrustedIdentitiesForOwnIdentities)
+
+       @Throws(PluginException::class)
+       private fun loadTrustedIdentitiesForOwnIdentities(ownIdentities: Collection<OwnIdentity>) =
+                       ownIdentities
+                                       .also { logger.fine { "Getting trusted identities for ${it.size} own identities..." } }
+                                       .associateWith { ownIdentity ->
+                                               logger.fine { "Getting trusted identities for $ownIdentity..." }
+                                               if (ownIdentity.doesNotHaveCorrectContext()) {
+                                                       logger.fine { "Skipping $ownIdentity because of incorrect context." }
+                                                       emptySet()
+                                               } else {
+                                                       logger.fine { "Loading trusted identities for $ownIdentity from WoT..." }
+                                                       time({ stopwatch, identities -> "Loaded ${identities.size} identities for ${ownIdentity.nickname} in ${stopwatch.elapsed(MILLISECONDS) / 1000.0}s." }) {
+                                                               webOfTrustConnector.loadTrustedIdentities(ownIdentity, context?.context)
+                                                       }
+                                               }
+                                       }
+
+       private fun OwnIdentity.doesNotHaveCorrectContext() =
+                       context?.let { it.context !in contexts } ?: false
+
+       private fun <R> time(logMessage: (Stopwatch, R) -> String, loader: () -> R) =
+                       Stopwatch.createStarted().let { stopwatch ->
+                               loader().also { logger.fine(logMessage(stopwatch, it)) }
+                       }
+
+}