--- /dev/null
+/**
+ * Sone - FreenetSessionProvider.kt - Copyright © 2020 David ‘Bombe’ 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.web
+
+import freenet.clients.http.SessionManager
+import freenet.clients.http.ToadletContext
+import net.pterodactylus.sone.data.Sone
+import net.pterodactylus.sone.database.SoneProvider
+import java.util.UUID
+import javax.inject.Inject
+
+/**
+ * [SoneProvider] implementation based on Freenet’s [SessionManager].
+ */
+class FreenetSessionProvider @Inject constructor(private val soneProvider: SoneProvider, private val sessionManager: SessionManager) : SessionProvider {
+
+ override fun getCurrentSone(toadletContext: ToadletContext): Sone? =
+ soneProvider.localSones.singleOrNull()
+ ?: sessionManager.useSession(toadletContext)
+ ?.let { it.getAttribute("Sone.CurrentSone") as? String }
+ ?.let(soneProvider.soneLoader)
+ ?.takeIf { it.isLocal }
+
+ override fun setCurrentSone(toadletContext: ToadletContext, sone: Sone?) {
+ if (sone == null) {
+ sessionManager.useSession(toadletContext)
+ ?.removeAttribute("Sone.CurrentSone")
+ } else {
+ sessionManager.getOrCreateSession(toadletContext)
+ ?.setAttribute("Sone.CurrentSone", sone.id)
+ }
+ }
+
+ private fun SessionManager.getOrCreateSession(toadletContext: ToadletContext) =
+ useSession(toadletContext)
+ ?: createSession(UUID.randomUUID().toString(), toadletContext)
+
+}