🚧 Add session provider implementation

[Sone.git] / src / main / kotlin / net / pterodactylus / sone / web / FreenetSessionProvider.kt

diff --git a/src/main/kotlin/net/pterodactylus/sone/web/FreenetSessionProvider.kt b/src/main/kotlin/net/pterodactylus/sone/web/FreenetSessionProvider.kt
new file mode 100644 (file)
index 0000000..80bacdf
--- /dev/null
+++ b/src/main/kotlin/net/pterodactylus/sone/web/FreenetSessionProvider.kt
@@ -0,0 +1,50 @@
+/**
+ * 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.useSession(toadletContext)
+                                       ?: sessionManager.createSession(UUID.randomUUID().toString(), toadletContext))
+                                       ?.setAttribute("Sone.CurrentSone", sone.id)
+               }
+       }
+
+}