Update external billing description (#142)

The payment method now displays the username instead of the payment
method name.

Author: Fabtron

scripts/maven.gradle

@@ -1,6 +1,5 @@
 task androidSourcesJar(type: Jar) {
-    archiveClassifier.set('sources')
-    from android.sourceSets.main.java.srcDirs
+   duplicatesStrategy(DuplicatesStrategy.EXCLUDE)
 }
 
 version = project.sdkVersion
@@ -20,7 +19,6 @@ afterEvaluate {
             }
             "$libName"(MavenPublication) {
                 from project.components.release
-                artifact androidSourcesJar
 
                 groupId = 'io.snabble.sdk'
                 artifactId = project.name

ui/src/main/java/io/snabble/sdk/ui/payment/externalbilling/ExternalBillingFragment.kt

@@ -61,13 +61,13 @@ open class ExternalBillingFragment : BaseFragment(
                     }
                 }
 
-                val title = stringResource(id = R.string.Snabble_Payment_ExternalBilling_title)
+                val idDescriptor = stringResource(id = R.string.Snabble_Payment_ExternalBilling_username)
 
                 ThemeWrapper {
                     ExternalBillingLoginScreen(
                         onSaveClick = { username, password ->
                             projectId?.let {
-                                viewModel.login(title, username, password, it)
+                                viewModel.login(idDescriptor, username, password, it)
                             }
                         },
                         isInputValid = false,

ui/src/main/java/io/snabble/sdk/ui/payment/externalbilling/viewmodel/ExternalBillingViewModel.kt

@@ -18,7 +18,7 @@ class ExternalBillingViewModel : ViewModel() {
     private var _uiState = MutableStateFlow<UiState>(Processing)
     internal val uiState: StateFlow<UiState> = _uiState.asStateFlow()
 
-    fun login(paymentMethod: String, username: String, password: String, projectId: String): Boolean {
+    fun login(idDescriptor: String, username: String, password: String, projectId: String): Boolean {
         viewModelScope.launch {
             val project = Snabble.projects.find { it.id == projectId }
             project?.let {
@@ -37,7 +37,7 @@ class ExternalBillingViewModel : ViewModel() {
                                 password = password
                             ),
                             projectId,
-                            paymentMethod,
+                            "$idDescriptor: $username",
                         )
                         val success = repo.addPaymentCredentials(paymentCredentials)
                         if (success && paymentCredentials != null) {