4 files changed, 75 insertions, 13 deletions

diff --git a/app/src/main/java/org/pacien/tincapp/activities/BaseActivity.kt b/app/src/main/java/org/pacien/tincapp/activities/BaseActivity.kt
index ff5b930..e90ada2 100644
--- a/app/src/main/java/org/pacien/tincapp/activities/BaseActivity.kt
+++ b/app/src/main/java/org/pacien/tincapp/activities/BaseActivity.kt
@@ -13,6 +13,8 @@ import org.pacien.tincapp.BuildConfig
 import org.pacien.tincapp.R
 import org.pacien.tincapp.context.App
 import org.pacien.tincapp.context.AppInfo
+import org.pacien.tincapp.context.AppPaths
+import org.pacien.tincapp.context.CrashRecorder
 
 /**
  * @author pacien
@@ -22,6 +24,7 @@ abstract class BaseActivity : AppCompatActivity() {
     super.onCreate(savedInstanceState)
     setContentView(R.layout.base)
     setSupportActionBar(toolbar)
+    handleRecentCrash()
   }
 
   override fun onCreateOptionsMenu(m: Menu): Boolean {
@@ -45,6 +48,26 @@ abstract class BaseActivity : AppCompatActivity() {
     if (!isFinishing && !isDestroyed) super.runOnUiThread(action)
   }
 
+  private fun handleRecentCrash() {
+    if (!CrashRecorder.hasPreviouslyCrashed()) return
+    CrashRecorder.dismissPreviousCrash()
+
+    AlertDialog.Builder(this)
+      .setTitle(R.string.title_app_crash)
+      .setMessage(listOf(
+        resources.getString(R.string.message_app_crash),
+        resources.getString(R.string.message_crash_logged, AppPaths.appLogFile().absolutePath)
+      ).joinToString("\n\n"))
+      .setNeutralButton(R.string.action_send_report, { _, _ ->
+        App.sendMail(
+          resources.getString(R.string.app_dev_email),
+          listOf(R.string.app_name, R.string.title_app_crash).joinToString(" / ", transform = resources::getString),
+          AppPaths.appLogFile().let { if (it.exists()) it.readText() else "" })
+      })
+      .setPositiveButton(R.string.action_close, { _, _ -> Unit })
+      .show()
+  }
+
   protected fun notify(@StringRes msg: Int) = Snackbar.make(activity_base, msg, Snackbar.LENGTH_LONG).show()
   protected fun notify(msg: String) = Snackbar.make(activity_base, msg, Snackbar.LENGTH_LONG).show()
   protected fun showProgressDialog(@StringRes msg: Int): ProgressDialog = ProgressDialog.show(this, null, getString(msg), true, false)
diff --git a/app/src/main/java/org/pacien/tincapp/context/App.kt b/app/src/main/java/org/pacien/tincapp/context/App.kt
index 53049f3..7ec1a47 100644
--- a/app/src/main/java/org/pacien/tincapp/context/App.kt
+++ b/app/src/main/java/org/pacien/tincapp/context/App.kt
@@ -9,31 +9,26 @@ import android.support.annotation.StringRes
 import android.support.v7.app.AlertDialog
 import android.view.WindowManager
 import org.pacien.tincapp.R
-import org.slf4j.Logger
 import org.slf4j.LoggerFactory
+import java.io.File
 
 /**
  * @author pacien
  */
-class App : Application(), Thread.UncaughtExceptionHandler {
-  private var logger: Logger? = null
-  private var systemCrashHandler: Thread.UncaughtExceptionHandler? = null
-
+class App : Application() {
   override fun onCreate() {
     super.onCreate()
     appContext = applicationContext
     handler = Handler()
-
     AppLogger.configure()
-    logger = LoggerFactory.getLogger(this.javaClass)
-
-    systemCrashHandler = Thread.getDefaultUncaughtExceptionHandler()
-    Thread.setDefaultUncaughtExceptionHandler(this)
+    setupCrashHandler()
   }
 
-  override fun uncaughtException(thread: Thread, throwable: Throwable) {
-    logger?.error("Fatal application error.", throwable)
-    systemCrashHandler?.uncaughtException(thread, throwable)
+  private fun setupCrashHandler() {
+    val logger = LoggerFactory.getLogger(this.javaClass)
+    val systemCrashHandler = Thread.getDefaultUncaughtExceptionHandler()
+    val crashRecorder = CrashRecorder(logger, systemCrashHandler)
+    Thread.setDefaultUncaughtExceptionHandler(crashRecorder)
   }
 
   companion object {
@@ -56,5 +51,16 @@ class App : Application(), Thread.UncaughtExceptionHandler {
       val chooser = Intent.createChooser(intent, getResources().getString(R.string.action_open_web_page))
       appContext?.startActivity(chooser.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK))
     }
+
+    fun sendMail(recipient: String, subject: String, body: String? = null, attachment: File? = null) {
+      val intent = Intent(Intent.ACTION_SENDTO, Uri.parse("mailto:"))
+        .putExtra(Intent.EXTRA_EMAIL, arrayOf(recipient))
+        .putExtra(Intent.EXTRA_SUBJECT, subject)
+        .apply { if (body != null) putExtra(Intent.EXTRA_TEXT, body) }
+        .apply { if (attachment != null) putExtra(Intent.EXTRA_STREAM, Uri.fromFile(attachment)) }
+
+      val chooser = Intent.createChooser(intent, getResources().getString(R.string.action_send_email))
+      appContext?.startActivity(chooser.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK))
+    }
   }
 }
diff --git a/app/src/main/java/org/pacien/tincapp/context/AppPaths.kt b/app/src/main/java/org/pacien/tincapp/context/AppPaths.kt
index 4b36dfe..3b84a69 100644
--- a/app/src/main/java/org/pacien/tincapp/context/AppPaths.kt
+++ b/app/src/main/java/org/pacien/tincapp/context/AppPaths.kt
@@ -14,6 +14,7 @@ object AppPaths {
   private const val TINC_BIN = "libtinc.so"
 
   private const val APPLOG_FILE = "tincapp.log"
+  private const val CRASHFLAG_FILE = "crash.flag"
   private const val LOGFILE_FORMAT = "tinc.%s.log"
   private const val PIDFILE_FORMAT = "tinc.%s.pid"
 
@@ -27,6 +28,7 @@ object AppPaths {
   fun storageAvailable() =
     Environment.getExternalStorageState().let { it == Environment.MEDIA_MOUNTED && it != Environment.MEDIA_MOUNTED_READ_ONLY }
 
+  fun internalCacheDir() = App.getContext().cacheDir
   fun cacheDir() = App.getContext().externalCacheDir
   fun confDir() = App.getContext().getExternalFilesDir(null)
   fun binDir() = File(App.getContext().applicationInfo.nativeLibraryDir)
@@ -39,6 +41,7 @@ object AppPaths {
   fun logFile(netName: String) = File(cacheDir(), String.format(LOGFILE_FORMAT, netName))
   fun pidFile(netName: String) = File(App.getContext().cacheDir, String.format(PIDFILE_FORMAT, netName))
   fun appLogFile() = File(cacheDir(), APPLOG_FILE)
+  fun crashFlagFile() = File(internalCacheDir(), CRASHFLAG_FILE)
 
   fun existing(f: File) = f.apply { if (!exists()) throw FileNotFoundException(f.absolutePath) }
 
diff --git a/app/src/main/java/org/pacien/tincapp/context/CrashRecorder.kt b/app/src/main/java/org/pacien/tincapp/context/CrashRecorder.kt
new file mode 100644
index 0000000..1e8556a
--- /dev/null
+++ b/app/src/main/java/org/pacien/tincapp/context/CrashRecorder.kt
@@ -0,0 +1,30 @@
+package org.pacien.tincapp.context
+
+import org.slf4j.Logger
+
+/**
+ * @author pacien
+ */
+class CrashRecorder(private val logger: Logger,
+                    private val upstreamCrashHandler: Thread.UncaughtExceptionHandler) : Thread.UncaughtExceptionHandler {
+
+  companion object {
+    private val flagFile = AppPaths.crashFlagFile()
+
+    fun hasPreviouslyCrashed() = flagFile.exists()
+
+    fun flagCrash() {
+      flagFile.apply { if (!exists()) createNewFile() }
+    }
+
+    fun dismissPreviousCrash() {
+      flagFile.delete()
+    }
+  }
+
+  override fun uncaughtException(thread: Thread, throwable: Throwable) {
+    logger.error("Fatal application error.", throwable)
+    flagCrash()
+    upstreamCrashHandler.uncaughtException(thread, throwable)
+  }
+}