1 files changed, 113 insertions, 0 deletions
diff --git a/ui/src/main/java/com/wireguard/android/preference/ZipExporterPreference.kt b/ui/src/main/java/com/wireguard/android/preference/ZipExporterPreference.kt
new file mode 100644
index 00000000..52701157
--- /dev/null
+++ b/ui/src/main/java/com/wireguard/android/preference/ZipExporterPreference.kt
@@ -0,0 +1,113 @@
+/*
+ * Copyright © 2017-2025 WireGuard LLC. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+package com.wireguard.android.preference
+
+import android.content.Context
+import android.util.AttributeSet
+import android.util.Log
+import androidx.preference.Preference
+import com.google.android.material.snackbar.Snackbar
+import com.wireguard.android.Application
+import com.wireguard.android.R
+import com.wireguard.android.util.AdminKnobs
+import com.wireguard.android.util.BiometricAuthenticator
+import com.wireguard.android.util.DownloadsFileSaver
+import com.wireguard.android.util.ErrorMessages
+import com.wireguard.android.util.activity
+import com.wireguard.android.util.lifecycleScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.async
+import kotlinx.coroutines.awaitAll
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import java.nio.charset.StandardCharsets
+import java.util.zip.ZipEntry
+import java.util.zip.ZipOutputStream
+
+/**
+ * Preference implementing a button that asynchronously exports config zips.
+ */
+class ZipExporterPreference(context: Context, attrs: AttributeSet?) : Preference(context, attrs) {
+    private var exportedFilePath: String? = null
+    private val downloadsFileSaver = DownloadsFileSaver(activity)
+
+    private fun exportZip() {
+        lifecycleScope.launch {
+            val tunnels = Application.getTunnelManager().getTunnels()
+            try {
+                exportedFilePath = withContext(Dispatchers.IO) {
+                    val configs = tunnels.map { async(SupervisorJob()) { it.getConfigAsync() } }.awaitAll()
+                    if (configs.isEmpty()) {
+                        throw IllegalArgumentException(context.getString(R.string.no_tunnels_error))
+                    }
+                    val outputFile = downloadsFileSaver.save("wireguard-export.zip", "application/zip", true)
+                    if (outputFile == null) {
+                        withContext(Dispatchers.Main.immediate) {
+                            isEnabled = true
+                        }
+                        return@withContext null
+                    }
+                    try {
+                        ZipOutputStream(outputFile.outputStream).use { zip ->
+                            for (i in configs.indices) {
+                                zip.putNextEntry(ZipEntry(tunnels[i].name + ".conf"))
+                                zip.write(configs[i].toWgQuickString().toByteArray(StandardCharsets.UTF_8))
+                            }
+                            zip.closeEntry()
+                        }
+                    } catch (e: Throwable) {
+                        outputFile.delete()
+                        throw e
+                    }
+                    outputFile.fileName
+                }
+                notifyChanged()
+            } catch (e: Throwable) {
+                val error = ErrorMessages[e]
+                val message = context.getString(R.string.zip_export_error, error)
+                Log.e(TAG, message, e)
+                Snackbar.make(
+                    activity.findViewById(android.R.id.content),
+                    message, Snackbar.LENGTH_LONG
+                ).show()
+                isEnabled = true
+            }
+        }
+    }
+
+    override fun getSummary() =
+        if (exportedFilePath == null) context.getString(R.string.zip_export_summary) else context.getString(R.string.zip_export_success, exportedFilePath)
+
+    override fun getTitle() = context.getString(R.string.zip_export_title)
+
+    override fun onClick() {
+        if (AdminKnobs.disableConfigExport) return
+        val fragment = activity.supportFragmentManager.fragments.first()
+        BiometricAuthenticator.authenticate(R.string.biometric_prompt_zip_exporter_title, fragment) {
+            when (it) {
+                // When we have successful authentication, or when there is no biometric hardware available.
+                is BiometricAuthenticator.Result.Success, is BiometricAuthenticator.Result.HardwareUnavailableOrDisabled -> {
+                    isEnabled = false
+                    exportZip()
+                }
+
+                is BiometricAuthenticator.Result.Failure -> {
+                    Snackbar.make(
+                        activity.findViewById(android.R.id.content),
+                        it.message,
+                        Snackbar.LENGTH_SHORT
+                    ).show()
+                }
+
+                is BiometricAuthenticator.Result.Cancelled -> {}
+            }
+        }
+    }
+
+    companion object {
+        private const val TAG = "WireGuard/ZipExporterPreference"
+    }
+}