[wallet] re-implement log export

very simple, just export to file for now

4 files changed, 74 insertions, 27 deletions

diff --git a/wallet/src/main/java/net/taler/wallet/MainViewModel.kt b/wallet/src/main/java/net/taler/wallet/MainViewModel.kt
index 99ac1f9..4dbea50 100644
--- a/wallet/src/main/java/net/taler/wallet/MainViewModel.kt
+++ b/wallet/src/main/java/net/taler/wallet/MainViewModel.kt
@@ -37,6 +37,7 @@ import net.taler.wallet.payment.PaymentManager
 import net.taler.wallet.peer.PeerManager
 import net.taler.wallet.pending.PendingOperationsManager
 import net.taler.wallet.refund.RefundManager
+import net.taler.wallet.settings.SettingsManager
 import net.taler.wallet.tip.TipManager
 import net.taler.wallet.transactions.TransactionManager
 import net.taler.wallet.withdraw.WithdrawManager
@@ -95,6 +96,7 @@ class MainViewModel(val app: Application) : AndroidViewModel(app) {
     val refundManager = RefundManager(api, viewModelScope)
     val exchangeManager: ExchangeManager = ExchangeManager(api, viewModelScope)
     val peerManager: PeerManager = PeerManager(api, viewModelScope)
+    val settingsManager: SettingsManager = SettingsManager(app.applicationContext, viewModelScope)
 
     private val mTransactionsEvent = MutableLiveData<Event<String>>()
     val transactionsEvent: LiveData<Event<String>> = mTransactionsEvent
diff --git a/wallet/src/main/java/net/taler/wallet/settings/SettingsFragment.kt b/wallet/src/main/java/net/taler/wallet/settings/SettingsFragment.kt
index 0435985..ecf45a6 100644
--- a/wallet/src/main/java/net/taler/wallet/settings/SettingsFragment.kt
+++ b/wallet/src/main/java/net/taler/wallet/settings/SettingsFragment.kt
@@ -18,7 +18,7 @@ package net.taler.wallet.settings
 
 import android.os.Bundle
 import android.view.View
-import android.widget.Toast
+import androidx.activity.result.contract.ActivityResultContracts.CreateDocument
 import androidx.appcompat.app.AlertDialog
 import androidx.fragment.app.activityViewModels
 import androidx.preference.Preference
@@ -35,11 +35,13 @@ import net.taler.wallet.BuildConfig.WALLET_CORE_VERSION
 import net.taler.wallet.MainViewModel
 import net.taler.wallet.R
 import net.taler.wallet.withdraw.WithdrawTestStatus
+import java.lang.System.currentTimeMillis
 
 
 class SettingsFragment : PreferenceFragmentCompat() {
 
     private val model: MainViewModel by activityViewModels()
+    private val settingsManager get() = model.settingsManager
     private val withdrawManager by lazy { model.withdrawManager }
 
     private lateinit var prefBackup: Preference
@@ -64,6 +66,10 @@ class SettingsFragment : PreferenceFragmentCompat() {
         )
     }
 
+    private val logLauncher = registerForActivityResult(CreateDocument("text/plain")) { uri ->
+        settingsManager.exportLogcat(uri)
+    }
+
     override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
         setPreferencesFromResource(R.xml.settings_main, rootKey)
         prefBackup = findPreference("pref_backup")!!
@@ -116,32 +122,7 @@ class SettingsFragment : PreferenceFragmentCompat() {
         }
 
         prefLogcat.setOnPreferenceClickListener {
-            val toast =
-                Toast.makeText(requireActivity(),
-                    "Log export currently unavailable",
-                    Toast.LENGTH_LONG)
-            toast.show()
-
-//            val myPid = android.os.Process.myPid()
-//            val proc = Runtime.getRuntime()
-//                .exec(arrayOf("logcat", "-d", "--pid=$myPid", "*:V"))
-//            val bytes = proc.inputStream.readBytes()
-//            val f = File(requireActivity().getExternalFilesDir(null),
-//                "taler-wallet-log-${System.currentTimeMillis()}.txt")
-//            f.writeBytes(bytes)
-//            val toast = Toast.makeText(requireActivity(), "Saved to ${f.absolutePath}", Toast.LENGTH_LONG)
-//            toast.show()
-//            val intent = Intent(Intent.ACTION_CREATE_DOCUMENT).apply {
-//                addCategory(Intent.CATEGORY_OPENABLE)
-//                type = "application/pdf"
-//                putExtra(Intent.EXTRA_TITLE, "invoice.pdf")
-//
-//                // Optionally, specify a URI for the directory that should be opened in
-//                // the system file picker before your app creates the document.
-//                putExtra(DocumentsContract.EXTRA_INITIAL_URI, pickerInitialUri)
-//            }
-//            startActivityForResult(intent, CREATE_FILE)
-//            ActivityResultContracts.CreateDocument
+            logLauncher.launch("taler-wallet-log-${currentTimeMillis()}.txt")
             true
         }
 
diff --git a/wallet/src/main/java/net/taler/wallet/settings/SettingsManager.kt b/wallet/src/main/java/net/taler/wallet/settings/SettingsManager.kt
new file mode 100644
index 0000000..6bf1673
--- /dev/null
+++ b/wallet/src/main/java/net/taler/wallet/settings/SettingsManager.kt
@@ -0,0 +1,62 @@
+/*
+ * This file is part of GNU Taler
+ * (C) 2022 Taler Systems S.A.
+ *
+ * GNU Taler 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, or (at your option) any later version.
+ *
+ * GNU Taler 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
+ * GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+package net.taler.wallet.settings
+
+import android.content.Context
+import android.net.Uri
+import android.util.Log
+import android.widget.Toast
+import android.widget.Toast.LENGTH_LONG
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import net.taler.wallet.R
+
+class SettingsManager(
+    private val context: Context,
+    private val scope: CoroutineScope,
+) {
+
+    fun exportLogcat(uri: Uri?) {
+        if (uri == null) {
+            onLogExportError()
+            return
+        }
+        scope.launch(Dispatchers.IO) {
+            try {
+                context.contentResolver.openOutputStream(uri, "wt")?.use { outputStream ->
+                    val command = arrayOf("logcat", "-d", "*:V")
+                    val proc = Runtime.getRuntime().exec(command)
+                    proc.inputStream.copyTo(outputStream)
+                } ?: onLogExportError()
+            } catch (e: Exception) {
+                Log.e(SettingsManager::class.simpleName, "Error exporting log: ", e)
+                onLogExportError()
+                return@launch
+            }
+            withContext(Dispatchers.Main) {
+                Toast.makeText(context, R.string.settings_logcat_success, LENGTH_LONG).show()
+            }
+        }
+    }
+
+    private fun onLogExportError() {
+        Toast.makeText(context, R.string.settings_logcat_error, LENGTH_LONG).show()
+    }
+
+}
diff --git a/wallet/src/main/res/values/strings.xml b/wallet/src/main/res/values/strings.xml
index 6d5f554..9fbe564 100644
--- a/wallet/src/main/res/values/strings.xml
+++ b/wallet/src/main/res/values/strings.xml
@@ -204,6 +204,8 @@ GNU Taler is immune against many types of fraud, such as phishing of credit card
     <string name="settings_withdraw_testkudos_summary">Get money for testing</string>
     <string name="settings_logcat">Debug log</string>
     <string name="settings_logcat_summary">View/send internal log</string>
+    <string name="settings_logcat_error">Error exporting log</string>
+    <string name="settings_logcat_success">Log exported to file</string>
     <string name="settings_version_app">App Version</string>
     <string name="settings_version_core">Wallet Core Version</string>
     <string name="settings_version_protocol_exchange">Supported Exchange Versions</string>