1 files changed, 71 insertions, 0 deletions

diff --git a/app/src/main/java/org/pacien/tincapp/context/StorageMigrator.kt b/app/src/main/java/org/pacien/tincapp/context/StorageMigrator.kt
new file mode 100644
index 0000000..e5740b8
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+++ b/app/src/main/java/org/pacien/tincapp/context/StorageMigrator.kt
@@ -0,0 +1,71 @@
+/*
+ * Tinc App, an Android binding and user interface for the tinc mesh VPN daemon
+ * Copyright (C) 2017-2023 Pacien TRAN-GIRARD
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+package org.pacien.tincapp.context
+
+import org.pacien.tincapp.extensions.Java.defaultMessage
+import org.slf4j.LoggerFactory
+import java.io.IOException
+
+/**
+ * Migrates the configuration from the private storage (used before version 0.38) to the
+ * user-accessible storage (through the USB storage mode).
+ *
+ * @author pacien
+ */
+class StorageMigrator {
+  private val log by lazy { LoggerFactory.getLogger(this.javaClass)!! }
+  private val context by lazy { App.getContext() }
+
+  fun migrate() {
+    migrateConfigurationDirectory()
+    migrateLogDirectory()
+  }
+
+  private fun migrateConfigurationDirectory() {
+    val oldConfigDir = context.filesDir
+    if (oldConfigDir == null || oldConfigDir.listFiles().isNullOrEmpty()) return // nothing to do
+
+    try {
+      val newConfigDir = context.getExternalFilesDir(null)!!
+      log.info(
+        "Migrating files present in old configuration directory at {} to {}",
+        oldConfigDir.absolutePath,
+        newConfigDir.absolutePath
+      )
+
+      oldConfigDir.copyRecursively(newConfigDir, overwrite = false)
+      oldConfigDir.deleteRecursively()
+    } catch (e: IOException) {
+      log.warn("Could not complete configuration directory migration: {}", e.defaultMessage())
+    }
+  }
+
+  private fun migrateLogDirectory() {
+    val oldLogDir = context.cacheDir
+    if (oldLogDir == null || oldLogDir.listFiles().isNullOrEmpty()) return // nothing to do
+
+    try {
+      // There's no point moving the log files. Let's delete those instead.
+      log.info("Clearing old cache directory at {}", oldLogDir.absolutePath)
+      oldLogDir.deleteRecursively()
+    } catch (e: IOException) {
+      log.warn("Could not remove old cache directory: {}", e.defaultMessage())
+    }
+  }
+}