preferences: rewrite in kotlin

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

1 files changed, 57 insertions, 0 deletions

diff --git a/ui/src/main/java/com/wireguard/android/preference/VersionPreference.kt b/ui/src/main/java/com/wireguard/android/preference/VersionPreference.kt
new file mode 100644
index 00000000..6c5284ec
--- /dev/null
+++ b/ui/src/main/java/com/wireguard/android/preference/VersionPreference.kt
@@ -0,0 +1,57 @@
+/*
+ * Copyright © 2017-2019 WireGuard LLC. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+package com.wireguard.android.preference
+
+import android.content.ActivityNotFoundException
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import android.util.AttributeSet
+import androidx.preference.Preference
+import com.wireguard.android.Application
+import com.wireguard.android.BuildConfig
+import com.wireguard.android.R
+import com.wireguard.android.backend.Backend
+import com.wireguard.android.backend.GoBackend
+import com.wireguard.android.backend.WgQuickBackend
+import java.util.Locale
+
+class VersionPreference(context: Context, attrs: AttributeSet?) : Preference(context, attrs) {
+    private var versionSummary: String? = null
+
+    override fun getSummary() = versionSummary
+
+    override fun getTitle() = context.getString(R.string.version_title, BuildConfig.VERSION_NAME)
+
+    override fun onClick() {
+        val intent = Intent(Intent.ACTION_VIEW)
+        intent.data = Uri.parse("https://www.wireguard.com/")
+        try {
+            context.startActivity(intent)
+        } catch (_: ActivityNotFoundException) {
+        }
+    }
+
+    companion object {
+        private fun getBackendPrettyName(context: Context, backend: Backend) = when (backend) {
+            is WgQuickBackend -> context.getString(R.string.type_name_kernel_module)
+            is GoBackend -> context.getString(R.string.type_name_go_userspace)
+            else -> ""
+        }
+    }
+
+    init {
+        Application.getBackendAsync().thenAccept { backend: Backend ->
+            versionSummary = getContext().getString(R.string.version_summary_checking, getBackendPrettyName(context, backend).toLowerCase(Locale.ENGLISH))
+            Application.getAsyncWorker().supplyAsync(backend::getVersion).whenComplete { version, exception ->
+                versionSummary = if (exception == null)
+                    getContext().getString(R.string.version_summary, getBackendPrettyName(context, backend), version)
+                else
+                    getContext().getString(R.string.version_summary_unknown, getBackendPrettyName(context, backend).toLowerCase(Locale.ENGLISH))
+                notifyChanged()
+            }
+        }
+    }
+}