Option to limit payment methods offered to add (#173)

Author: cmaier

CHANGELOG.md

@@ -7,6 +7,10 @@ All notable changes to this project will be documented in this file.
 ### Removed
 ### Fixed
 
+## [0.72.4] 
+### Added
+* core, io: Option to limit payment methods offered to add (#173)
+
 ## [0.72.3]
 ### Fixed
 * core, ui: Bind Giropay to its project (#172)

core/src/main/java/io/snabble/sdk/PaymentMethod.kt

@@ -1,5 +1,7 @@
 package io.snabble.sdk
 
+import android.os.Parcel
+import android.os.Parcelable
 import androidx.annotation.Nullable
 import com.google.gson.annotations.SerializedName
 
@@ -31,7 +33,7 @@ enum class PaymentMethod(
      * Declares if the payment method can only be aborted with a confirmation by the backend
      */
     val needsAbortConfirmation: Boolean,
-) {
+) : Parcelable {
 
     @SerializedName("qrCodePOS")
     QRCODE_POS(
@@ -168,8 +170,18 @@ enum class PaymentMethod(
         needsAbortConfirmation = true
     );
 
+    override fun describeContents(): Int = 0
+
+    override fun writeToParcel(dest: Parcel, flags: Int) = dest.writeInt(ordinal)
+
     companion object {
 
+        @JvmField
+        val CREATOR = object : Parcelable.Creator<PaymentMethod> {
+            override fun createFromParcel(parcel: Parcel) = PaymentMethod.values()[parcel.readInt()]
+            override fun newArray(size: Int) = arrayOfNulls<PaymentMethod>(size)
+        }
+
         /**
          * Converts a payment method from its string representation.
          */

ui/src/main/java/io/snabble/sdk/ui/payment/SelectPaymentMethodFragment.java

@@ -1,6 +1,7 @@
 package io.snabble.sdk.ui.payment;
 
 import android.os.Bundle;
+import android.os.Parcelable;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -18,6 +19,7 @@
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
+import java.util.stream.Collectors;
 
 import io.snabble.sdk.PaymentMethod;
 import io.snabble.sdk.Project;
@@ -27,18 +29,23 @@
 
 public class SelectPaymentMethodFragment extends BottomSheetDialogFragment {
     public static final String ARG_PROJECT_ID = "projectId";
+    public static final String ARG_SUPPORTED_METHODS = "supportedMethods";
 
     private List<Entry> entries;
     private Set<PaymentMethod> paymentMethods;
     private String projectId;
 
+    @Nullable
+    private List<PaymentMethod> supportedMethods;
+
     @Override
     public void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
         Bundle args = getArguments();
         if (args != null) {
             projectId = args.getString(ARG_PROJECT_ID, null);
+            supportedMethods = convertToList(args.getParcelableArray(ARG_SUPPORTED_METHODS), PaymentMethod.class);
         }
     }
 
@@ -51,7 +58,11 @@ public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle sa
         Set<PaymentMethod> availablePaymentMethods = new HashSet<>();
         for (Project project : Snabble.getInstance().getProjects()) {
             if (project.getId().equals(projectId)) {
-                availablePaymentMethods.addAll(project.getAvailablePaymentMethods());
+                final List<PaymentMethod> methods = project.getAvailablePaymentMethods()
+                        .stream()
+                        .filter(this::isSupportedMethod)
+                        .collect(Collectors.toList());
+                availablePaymentMethods.addAll(methods);
             }
         }
 
@@ -188,6 +199,13 @@ public void click() {
         return v;
     }
 
+    private boolean isSupportedMethod(@NonNull final PaymentMethod method) {
+        if (supportedMethods != null) {
+            return supportedMethods.contains(method);
+        }
+        return true;
+    }
+
     private String getUsableAtText(PaymentMethod... paymentMethods) {
         List<Project> projects = Snabble.getInstance().getProjects();
         if (projects.size() == 1) {
@@ -219,6 +237,20 @@ private String getUsableAtText(PaymentMethod... paymentMethods) {
         return getResources().getString(R.string.Snabble_Payment_usableAt, sb.toString());
     }
 
+    @SuppressWarnings("unchecked")
+    @Nullable
+    private <T> List<T> convertToList(final Parcelable[] parcels, final Class<T> clazz) {
+        if (parcels == null) return null;
+
+        final List<T> list = new ArrayList<>(parcels.length);
+        for (final Parcelable parcel : parcels) {
+            if (parcel.getClass() == clazz) {
+                list.add(((T) parcel));
+            }
+        }
+        return list;
+    }
+
     private static class Entry {
         int drawableRes;
         String text;