🎨 Replace IdentityLoader with Kotlin version

[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)
index 0000000..3fa87ba
--- /dev/null
+++ b/src/main/kotlin/net/pterodactylus/sone/freenet/wot/IdentityLoader.kt
@@ -0,0 +1,59 @@
+/*
+ * 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(): Map<OwnIdentity, Collection<Identity>> =
+                       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.associateWith { ownIdentity ->
+                               if (ownIdentity.doesNotHaveCorrectContext()) {
+                                       emptySet<Identity>()
+                               } else {
+                                       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 != null && !hasContext(context.context)
+
+       private fun <R> time(logMessage: (Stopwatch, Collection<R>) -> String, loader: () -> Collection<R>): Collection<R> =
+                       Stopwatch.createStarted().let { stopwatch ->
+                               loader().also { logger.fine(logMessage(stopwatch, it)) }
+                       }
+
+}