Add setting for fallback username (#772)

* PasswordEntry: remove useless annotations

Turns out VisibleForTesting only applies for documentation purposes. Boo >:(

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

* PasswordEntry: silence locale warning

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

* Add setting for fallback username

Fixes #763

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

app/src/main/java/com/zeapo/pwdstore/PasswordEntry.kt

@@ -5,8 +5,6 @@
 package com.zeapo.pwdstore
 
 import android.net.Uri
-import androidx.annotation.VisibleForTesting
-import androidx.annotation.VisibleForTesting.PRIVATE
 import java.io.ByteArrayOutputStream
 import java.io.UnsupportedEncodingException
 
@@ -100,7 +98,7 @@ class PasswordEntry(private val content: String) {
             if (line.startsWith("otpauth://totp/")) {
                 return Uri.parse(line).getQueryParameter("secret")
             }
-            if (line.toLowerCase().startsWith("totp:")) {
+            if (line.startsWith("totp:", ignoreCase = true)) {
                 return line.split(": *".toRegex(), 2).toTypedArray()[1]
             }
         }
@@ -165,7 +163,6 @@ class PasswordEntry(private val content: String) {
     }
 
     companion object {
-        @VisibleForTesting(otherwise = PRIVATE)
         val USERNAME_FIELDS = arrayOf(
             "login:",
             "username:",

app/src/main/java/com/zeapo/pwdstore/UserPreference.kt

@@ -28,6 +28,7 @@ import androidx.core.content.edit
 import androidx.core.content.getSystemService
 import androidx.documentfile.provider.DocumentFile
 import androidx.preference.CheckBoxPreference
+import androidx.preference.EditTextPreference
 import androidx.preference.ListPreference
 import androidx.preference.Preference
 import androidx.preference.PreferenceFragmentCompat
@@ -114,21 +115,22 @@ class UserPreference : AppCompatActivity() {
 
             // Autofill preferences
             autoFillEnablePreference = findPreference("autofill_enable")
-            val autoFillAppsPreference = findPreference<Preference>("autofill_apps")!!
-            val autoFillDefaultPreference = findPreference<CheckBoxPreference>("autofill_default")!!
-            val autoFillAlwaysShowDialogPreference =
-                findPreference<CheckBoxPreference>("autofill_always")!!
-            val autoFillShowFullNamePreference =
-                findPreference<CheckBoxPreference>("autofill_full_path")!!
-            autofillDependencies = listOf(
+            val oreoAutofillDirectoryStructurePreference = findPreference<ListPreference>("oreo_autofill_directory_structure")
+            val oreoAutofillDefaultUsername = findPreference<EditTextPreference>("oreo_autofill_default_username")
+            val autoFillAppsPreference = findPreference<Preference>("autofill_apps")
+            val autoFillDefaultPreference = findPreference<CheckBoxPreference>("autofill_default")
+            val autoFillAlwaysShowDialogPreference = findPreference<CheckBoxPreference>("autofill_always")
+            val autoFillShowFullNamePreference = findPreference<CheckBoxPreference>("autofill_full_path")
+            autofillDependencies = listOfNotNull(
                 autoFillAppsPreference,
                 autoFillDefaultPreference,
                 autoFillAlwaysShowDialogPreference,
                 autoFillShowFullNamePreference
             )
-            val oreoAutofillDirectoryStructurePreference =
-                findPreference<ListPreference>("oreo_autofill_directory_structure")!!
-            oreoAutofillDependencies = listOf(oreoAutofillDirectoryStructurePreference)
+            oreoAutofillDependencies = listOfNotNull(
+                oreoAutofillDirectoryStructurePreference,
+                oreoAutofillDefaultUsername
+            )
 
             // Misc preferences
             val appVersionPreference = findPreference<Preference>("app_version")
@@ -258,7 +260,7 @@ class UserPreference : AppCompatActivity() {
             selectExternalGitRepositoryPreference?.onPreferenceChangeListener = resetRepo
             externalGitRepositoryPreference?.onPreferenceChangeListener = resetRepo
 
-            autoFillAppsPreference.onPreferenceClickListener = ClickListener {
+            autoFillAppsPreference?.onPreferenceClickListener = ClickListener {
                 val intent = Intent(callingActivity, AutofillPreferenceActivity::class.java)
                 startActivity(intent)
                 true

app/src/main/java/com/zeapo/pwdstore/autofill/oreo/AutofillHelper.kt

@@ -16,6 +16,7 @@ import android.view.autofill.AutofillId
 import android.widget.RemoteViews
 import android.widget.Toast
 import androidx.annotation.RequiresApi
+import androidx.preference.PreferenceManager
 import com.github.ajalt.timberkt.Timber.tag
 import com.github.ajalt.timberkt.e
 import com.zeapo.pwdstore.PasswordEntry
@@ -35,6 +36,12 @@ private fun ByteArray.base64(): String {
     return Base64.encodeToString(this, Base64.NO_WRAP)
 }
 
+private fun Context.getDefaultUsername(): String? {
+    return PreferenceManager
+        .getDefaultSharedPreferences(this)
+        .getString("oreo_autofill_default_username", null)
+}
+
 private fun stableHash(array: Collection<ByteArray>): String {
     val hashes = array.map { it.sha256().base64() }
     return hashes.sorted().joinToString(separator = ";")
@@ -82,12 +89,15 @@ val AssistStructure.ViewNode.webOrigin: String?
 data class Credentials(val username: String?, val password: String) {
     companion object {
         fun fromStoreEntry(
+            context: Context,
             file: File,
             entry: PasswordEntry,
             directoryStructure: DirectoryStructure
         ): Credentials {
             // Always give priority to a username stored in the encrypted extras
-            val username = entry.username ?: directoryStructure.getUsernameFor(file)
+            val username = entry.username
+                ?: directoryStructure.getUsernameFor(file)
+                ?: context.getDefaultUsername()
             return Credentials(username, entry.password)
         }
     }

app/src/main/java/com/zeapo/pwdstore/autofill/oreo/ui/AutofillDecryptActivity.kt

@@ -180,7 +180,7 @@ class AutofillDecryptActivity : Activity(), CoroutineScope {
                     val entry = withContext(Dispatchers.IO) {
                         PasswordEntry(decryptedOutput)
                     }
-                    Credentials.fromStoreEntry(file, entry, directoryStructure)
+                    Credentials.fromStoreEntry(this, file, entry, directoryStructure)
                 } catch (e: UnsupportedEncodingException) {
                     e(e) { "Failed to parse password entry" }
                     null

app/src/main/res/values/strings.xml

@@ -370,4 +370,6 @@
     <string name="snackbar_action_grant">Grant</string>
     <string name="pref_debug_logging_summary">Enable debug logging (requires app restart)</string>
     <string name="pref_debug_logging_title">Debug logging</string>
+    <string name="preference_default_username_summary">If Autofill is unable to determine a username from your password file or directory structure, it will use the value specified here</string>
+    <string name="preference_default_username_title">Default username</string>
 </resources>

app/src/main/res/xml/preference.xml

@@ -13,6 +13,10 @@
             app:key="oreo_autofill_directory_structure"
             app:title="@string/oreo_autofill_preference_directory_structure"
             app:useSimpleSummaryProvider="true" />
+        <EditTextPreference
+            app:key="oreo_autofill_default_username"
+            app:summary="@string/preference_default_username_summary"
+            app:title="@string/preference_default_username_title" />
         <Preference
             app:key="autofill_apps"
             app:title="@string/pref_autofill_apps_title" />