Implemented displaying auto retrieved BIC and bank name in an info label; extracted InfoLabel from ValidationLabel

ui/BankingAndroidApp/src/main/java/net/dankito/banking/ui/android/dialogs/TransferMoneyDialog.kt

@@ -59,6 +59,9 @@ open class TransferMoneyDialog : DialogFragment() {
     protected val inputValidator = InputValidator() // TODO: move to presenter
 
 
+    protected var remitteeBic: String? = null
+
+
     protected var validRemitteeNameEntered = false
 
     protected var validRemitteeIbanEntered = false
@@ -133,7 +136,6 @@ open class TransferMoneyDialog : DialogFragment() {
             tryToGetBicFromIban(it)
         })
 
-        rootView.edtxtRemitteeBic.addTextChangedListener(checkRequiredDataWatcher())
         rootView.edtxtAmount.addTextChangedListener(checkRequiredDataWatcher())
         rootView.edtxtUsage.addTextChangedListener(checkRequiredDataWatcher {
             checkIfEnteredUsageTextIsValid()
@@ -141,13 +143,11 @@ open class TransferMoneyDialog : DialogFragment() {
 
         rootView.edtxtRemitteeName.setOnFocusChangeListener { _, hasFocus -> if (hasFocus == false) checkIfEnteredRemitteeNameIsValidAfterFocusLost() }
         rootView.edtxtRemitteeIban.setOnFocusChangeListener { _, hasFocus -> if (hasFocus == false) checkIfEnteredRemitteeIbanIsValidAfterFocusLost() }
-        rootView.edtxtRemitteeBic.setOnFocusChangeListener { _, hasFocus -> if (hasFocus == false) checkIfEnteredRemitteeBicIsValid() }
         rootView.edtxtAmount.setOnFocusChangeListener { _, hasFocus -> if (hasFocus == false) checkIfEnteredAmountIsValid() }
         rootView.edtxtUsage.setOnFocusChangeListener { _, hasFocus -> if (hasFocus == false) checkIfEnteredUsageTextIsValid() }
 
         transferMoneyIfEnterPressed(rootView.edtxtRemitteeName)
         transferMoneyIfEnterPressed(rootView.edtxtRemitteeIban)
-        transferMoneyIfEnterPressed(rootView.edtxtRemitteeBic)
         transferMoneyIfEnterPressed(rootView.edtxtAmount)
         transferMoneyIfEnterPressed(rootView.edtxtUsage)
 
@@ -218,7 +218,7 @@ open class TransferMoneyDialog : DialogFragment() {
             }
 
             // a little bit inconsistent as if IBAN is not set bank's name won't be displayed even though it can be retrieved by BIC
-            rootView.edtxtRemitteeBic.setText(data.creditorBic)
+            remitteeBic = data.creditorBic
 
             if (data.amount > BigDecimal.ZERO) {
                 rootView.edtxtAmount.setText(AmountFormat.format(data.amount))
@@ -231,12 +231,7 @@ open class TransferMoneyDialog : DialogFragment() {
     protected open fun focusEditTextAccordingToPreselectedValues(rootView: View, data: TransferMoneyData) {
         if (data.creditorName.trim().isNotEmpty()) {
             if (data.creditorIban.trim().isNotEmpty()) {
-                if (data.creditorBic.trim().isNotEmpty()) {
+                rootView.edtxtAmount.requestFocus()
-                    rootView.edtxtAmount.requestFocus()
-                }
-                else {
-                    rootView.edtxtRemitteeBic.requestFocus()
-                }
             }
             else {
                 rootView.edtxtRemitteeIban.requestFocus()
@@ -247,8 +242,8 @@ open class TransferMoneyDialog : DialogFragment() {
 
     protected open fun remitteeSelected(item: Remittee) {
         edtxtRemitteeName.setText(item.name)
-        edtxtRemitteeBic.setText(item.bic)
         edtxtRemitteeIban.setText(item.iban)
+        remitteeBic = item.bic
     }
 
     protected open fun transferMoney() {
@@ -256,7 +251,7 @@ open class TransferMoneyDialog : DialogFragment() {
             val data = TransferMoneyData(
                 inputValidator.convertToAllowedSepaCharacters(edtxtRemitteeName.text.toString()),
                 edtxtRemitteeIban.text.toString().replace(" ", ""),
-                edtxtRemitteeBic.text.toString().replace(" ", ""),
+                remitteeBic?.replace(" ", "") ?: "", // should always be != null at this point
                 amount.toBigDecimal(),
                 inputValidator.convertToAllowedSepaCharacters(edtxtUsage.text.toString()),
                 chkbxInstantPayment.isChecked
@@ -308,18 +303,26 @@ open class TransferMoneyDialog : DialogFragment() {
     protected open fun tryToGetBicFromIban(enteredIban: CharSequence) {
         presenter.findUniqueBankForIbanAsync(enteredIban.toString()) { foundBank ->
             context?.asActivity()?.runOnUiThread {
-                showValuesForFoundBankOnUiThread(foundBank)
+                showValuesForFoundBankOnUiThread(enteredIban, foundBank)
             }
         }
     }
 
-    private fun showValuesForFoundBankOnUiThread(foundBank: BankInfo?) {
+    private fun showValuesForFoundBankOnUiThread(enteredIban: CharSequence, foundBank: BankInfo?) {
         validRemitteeBicEntered = foundBank != null
+        remitteeBic = foundBank?.bic
 
-        edtxtRemitteeBank.setText(if (foundBank != null) (foundBank.name + " " + foundBank.city) else "")
+        if (foundBank != null) {
-
+            txtRemitteeBankInfo.text = getString(R.string.dialog_transfer_money_bic_detected_from_iban, foundBank.bic, foundBank.name)
-        edtxtRemitteeBic.setText(foundBank?.bic ?: "") // TODO: check if user entered BIC to not overwrite self entered BIC
+            txtRemitteeBankInfo.visibility = View.VISIBLE
-        lytRemitteeBic.error = null // TODO: show information here if BIC hasn't been found
+        }
+        else if (enteredIban.length >= InputValidator.MinimumLengthToDetermineBicFromIban) {
+            txtRemitteeBankInfo.text = getString(R.string.dialog_transfer_money_could_not_determine_bic_from_iban, enteredIban.substring(4, InputValidator.MinimumLengthToDetermineBicFromIban))
+            txtRemitteeBankInfo.visibility = View.VISIBLE
+        }
+        else {
+            txtRemitteeBankInfo.visibility = View.GONE
+        }
 
         checkIfRequiredDataEnteredOnUiThread()
     }
@@ -357,13 +360,6 @@ open class TransferMoneyDialog : DialogFragment() {
         this.validRemitteeIbanEntered = validationResult.validationSuccessfulOrCouldCorrectString
 
         showValidationResult(lytRemitteeIban, validationResult)
-
-        if (validRemitteeBicEntered || enteredIban.isBlank()) {
-            lytRemitteeBic.error = null
-        }
-        else {
-            lytRemitteeBic.error = context?.getString(R.string.error_no_bank_found_for_entered_iban)
-        }
     }
 
     protected open fun checkIfEnteredRemitteeIbanIsValidAfterFocusLost() {
@@ -376,15 +372,6 @@ open class TransferMoneyDialog : DialogFragment() {
         }
     }
 
-    protected open fun checkIfEnteredRemitteeBicIsValid() {
-        val enteredBic = edtxtRemitteeBic.text.toString()
-        val validationResult = inputValidator.validateBic(enteredBic)
-
-        this.validRemitteeBicEntered = validationResult.validationSuccessfulOrCouldCorrectString
-
-        showValidationResult(lytRemitteeBic, validationResult)
-    }
-
     protected open fun checkIfEnteredAmountIsValid() {
         val validationResult = inputValidator.validateAmount(edtxtAmount.text.toString())
 

ui/BankingAndroidApp/src/main/res/layout/dialog_transfer_money.xml

@@ -79,41 +79,14 @@
 
         </com.google.android.material.textfield.TextInputLayout>
 
-
+        <TextView
-        <com.google.android.material.textfield.TextInputLayout
+            android:id="@+id/txtRemitteeBankInfo"
-            android:id="@+id/lytRemitteeBank"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:hint="@string/dialog_transfer_money_remittee_bank"
+            style="@style/TextAppearance.AppCompat.Small"
-        >
+            android:visibility="gone"
-
-            <com.google.android.material.textfield.TextInputEditText
-                android:id="@+id/edtxtRemitteeBank"
-                android:layout_width="match_parent"
-                android:layout_height="@dimen/dialog_transfer_money_input_fields_height"
-                android:inputType="text"
-                android:enabled="false"
             />
 
-        </com.google.android.material.textfield.TextInputLayout>
-
-
-        <com.google.android.material.textfield.TextInputLayout
-            android:id="@+id/lytRemitteeBic"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:hint="@string/dialog_transfer_money_remittee_bic"
-        >
-
-            <com.google.android.material.textfield.TextInputEditText
-                android:id="@+id/edtxtRemitteeBic"
-                android:layout_width="match_parent"
-                android:layout_height="@dimen/dialog_transfer_money_input_fields_height"
-                android:inputType="text"
-            />
-
-        </com.google.android.material.textfield.TextInputLayout>
-
 
         <com.google.android.material.textfield.TextInputLayout
             android:id="@+id/lytAmount"

ui/BankingAndroidApp/src/main/res/values-de/strings.xml

@@ -52,8 +52,8 @@
     <string name="dialog_transfer_money_account">Konto:</string>
     <string name="dialog_transfer_money_remittee_name">Name:</string>
     <string name="dialog_transfer_money_remittee_iban">IBAN:</string>
-    <string name="dialog_transfer_money_remittee_bank">Bank (wird automatisch eingetragen):</string>
+    <string name="dialog_transfer_money_bic_detected_from_iban">BIC: %1$s, %2$s</string>
-    <string name="dialog_transfer_money_remittee_bic">BIC (wird automatisch eingetragen):</string>
+    <string name="dialog_transfer_money_could_not_determine_bic_from_iban">Keine BIC gefunden für BLZ %1$s</string>
     <string name="dialog_transfer_money_amount">Betrag:</string>
     <string name="dialog_transfer_money_usage">Verwendungszweck:</string>
     <string name="dialog_transfer_money_instant_payment">Echtzeitüberweisung</string>
@@ -103,8 +103,6 @@
     <string name="error_no_iban_entered">Bitte geben Sie die IBAN des Empfängers ein</string>
     <string name="error_invalid_iban_characters_entered">Unzulässige(s) Zeichen eingegeben: %s</string>
     <string name="error_invalid_iban_pattern_entered">IBANs bestehen aus folgendem Muster: DE12 1234 5678 9012 3456 78</string>
-    <string name="error_no_bank_found_for_entered_iban">Es wurde keine Bank zur eingegebenen IBAN gefunden.</string>
-    <string name="error_no_bic_entered">Bitte geben Sie die BIC des Empfängers ein</string>
     <string name="error_invalid_bic_characters_entered">Unzulässige(s) Zeichen eingegeben: %s</string>
     <string name="error_invalid_bic_pattern_entered">Eine BIC besteht aus 8 oder 11 Zeichen und folgt dem Muster: ABCDED12(XYZ)</string>
     <string name="error_no_amount_entered">Bitte geben Sie den zu überweisenden Betrag ein</string>

ui/BankingAndroidApp/src/main/res/values/strings.xml

@@ -52,8 +52,8 @@
     <string name="dialog_transfer_money_account">Account:</string>
     <string name="dialog_transfer_money_remittee_name">Name:</string>
     <string name="dialog_transfer_money_remittee_iban">IBAN:</string>
-    <string name="dialog_transfer_money_remittee_bank">Bank (will be entered automatically):</string>
+    <string name="dialog_transfer_money_bic_detected_from_iban">BIC: %1$s, %2$s</string>
-    <string name="dialog_transfer_money_remittee_bic">BIC (will be entered automatically):</string>
+    <string name="dialog_transfer_money_could_not_determine_bic_from_iban">No BIC found for bank code %1$s</string>
     <string name="dialog_transfer_money_amount">Amount:</string>
     <string name="dialog_transfer_money_usage">Usage:</string>
     <string name="dialog_transfer_money_instant_payment">Instant payment</string>
@@ -103,8 +103,6 @@
     <string name="error_no_iban_entered">Please enter remittee\'s IBAN</string>
     <string name="error_invalid_iban_characters_entered">Invalid character(s) entered: %s</string>
     <string name="error_invalid_iban_pattern_entered">IBAN has to have pattern: EN12 1234 5678 9012 3456 78</string>
-    <string name="error_no_bank_found_for_entered_iban">No bank found for entered IBAN.</string>
-    <string name="error_no_bic_entered">Please enter remittee\'s BIC</string>
     <string name="error_invalid_bic_characters_entered">Invalid character(s) entered: %s</string>
     <string name="error_invalid_bic_pattern_entered">A BIC consists of 8 or 11 characters and has the pattern: ABCDED12(XYZ)</string>
     <string name="error_no_amount_entered">Please enter the amount to be transferred</string>

ui/BankingUiCommon/src/commonMain/kotlin/net/dankito/banking/util/InputValidator.kt

@@ -17,6 +17,8 @@ open class InputValidator {
 
         const val UsageMaxLength = 140
 
+        const val MinimumLengthToDetermineBicFromIban = 12 // TODO: this is only true for German (and may some other) IBANs
+
 
         /**
          * The IBAN consists of up to 34 alphanumeric characters, as follows:

ui/BankingiOSApp/BankingiOSApp/Base.lproj/Localizable.strings

@@ -72,6 +72,8 @@
 "Transfer Money Dialog Title" = "Bank transfer";
 "Remittee Name" = "Name";
 "Remittee IBAN" = "IBAN";
+"BIC: %@, %@" = "BIC: %@, %@";
+"No BIC found for bank code %@" = "No BIC found for bank code %@";
 "Amount" = "Amount";
 "Usage" = "Usage";
 "Instant Payment" = "Instant Payment";

ui/BankingiOSApp/BankingiOSApp/de.lproj/Localizable.strings

@@ -72,6 +72,8 @@
 "Transfer Money Dialog Title" = "Überweisung";
 "Remittee Name" = "Name";
 "Remittee IBAN" = "IBAN";
+"BIC: %@, %@" = "BIC: %@, %@";
+"No BIC found for bank code %@" = "Keine BIC gefunden für BLZ %@";
 "Amount" = "Betrag";
 "Usage" = "Verwendungszweck";
 "Instant Payment" = "Echtzeitüberweisung";

ui/BankingiOSApp/BankingiOSApp/ui/InfoLabel.swift

@@ -0,0 +1,47 @@
+import SwiftUI
+
+
+struct InfoLabel: View {
+    
+    private let information: LocalizedStringKey
+    
+    
+    init(_ information: String) {
+        self.init(LocalizedStringKey(information))
+    }
+    
+    init(_ information: LocalizedStringKey) {
+        self.information = information
+    }
+    
+
+    var body: some View {
+        VStack {
+            Spacer()
+            .frame(height: 6)
+            
+            HStack {
+                Text(information)
+                .padding(.leading, 16)
+                
+                Spacer()
+            }
+            
+            Spacer()
+            .frame(height: 18)
+        }
+        .font(.callout)
+        .systemGroupedBackground()
+        .listRowInsets(EdgeInsets())
+    }
+
+}
+
+
+struct InfoLabel_Previews: PreviewProvider {
+
+    static var previews: some View {
+        InfoLabel("A nice info")
+    }
+
+}

ui/BankingiOSApp/BankingiOSApp/ui/SwiftExtensions.swift

@@ -20,6 +20,25 @@ extension String {
         return NSLocalizedString(self, comment: "")
     }
     
+
+    subscript(_ i: Int) -> String {
+      let idx1 = index(startIndex, offsetBy: i)
+      let idx2 = index(idx1, offsetBy: 1)
+      return String(self[idx1..<idx2])
+    }
+
+    subscript (r: Range<Int>) -> String {
+      let start = index(startIndex, offsetBy: r.lowerBound)
+      let end = index(startIndex, offsetBy: r.upperBound)
+      return String(self[start ..< end])
+    }
+
+    subscript (r: CountableClosedRange<Int>) -> String {
+      let startIndex =  self.index(self.startIndex, offsetBy: r.lowerBound)
+      let endIndex = self.index(startIndex, offsetBy: r.upperBound - r.lowerBound)
+      return String(self[startIndex...endIndex])
+    }
+    
 }
 
 extension Optional where Wrapped == String {

ui/BankingiOSApp/BankingiOSApp/ui/ValidationLabel.swift

@@ -25,24 +25,8 @@ struct ValidationLabel: View {
     
 
     var body: some View {
-        VStack {
+        InfoLabel(validationErrorOrHint)
-            Spacer()
-            .frame(height: 6)
-            
-            HStack {
-                Text(validationErrorOrHint)
-                .padding(.leading, 16)
-                
-                Spacer()
-            }
-            
-            Spacer()
-            .frame(height: 18)
-        }
-        .font(.callout)
         .foregroundColor(isHint ? Color.yellow : Color.red)
-        .systemGroupedBackground()
-        .listRowInsets(EdgeInsets())
     }
 
 }

ui/BankingiOSApp/BankingiOSApp/ui/views/TransferMoneyDialog.swift

@@ -29,6 +29,8 @@ struct TransferMoneyDialog: View {
     @State private var isValidRemitteeBicEntered = false
     @State private var remitteeBicValidationResult: ValidationResult? = nil
     
+    @State private var remitteeBankInfo: String? = nil
+    
     @State private var amount = ""
     @State private var isValidAmountEntered = false
     @State private var amountValidationResult: ValidationResult? = nil
@@ -127,6 +129,11 @@ struct TransferMoneyDialog: View {
                 remitteeIbanValidationResult.map { validationError in
                     ValidationLabel(validationError)
                 }
+                
+                remitteeBankInfo.map {
+                    InfoLabel($0)
+                    .font(.caption)
+                }
             }
             
             Section {
@@ -215,9 +222,17 @@ struct TransferMoneyDialog: View {
         
         if let foundBank = foundBank {
             self.remitteeBic = foundBank.bic
+            self.remitteeBankInfo = "BIC: \(foundBank.bic), \(foundBank.name)"
         }
         else {
             self.remitteeBic = ""
+            
+            if enteredIban.count >= InputValidator.Companion().MinimumLengthToDetermineBicFromIban {
+                self.remitteeBankInfo = "No BIC found for bank code \(enteredIban[4..<Int(InputValidator.Companion().MinimumLengthToDetermineBicFromIban)])"
+            }
+            else {
+                self.remitteeBankInfo = nil
+            }
         }
 
         // TODO: implement a better check if entered BIC is valid (e.g. if format is ABCDDEXX123)