Detect locally installed native Android payment apps.

chrome/android/java/src/org/chromium/chrome/browser/payments/AndroidPaymentAppFactory.java

Index: chrome/android/java/src/org/chromium/chrome/browser/payments/AndroidPaymentAppFactory.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/payments/AndroidPaymentAppFactory.java b/chrome/android/java/src/org/chromium/chrome/browser/payments/AndroidPaymentAppFactory.java
new file mode 100644
index 0000000000000000000000000000000000000000..1914bb02d7a1c28bd45f261c1620ddeee8e8d432
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/payments/AndroidPaymentAppFactory.java
@@ -0,0 +1,68 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.payments;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.net.Uri;
+
+import org.chromium.chrome.browser.payments.PaymentAppFactory.PaymentAppCreatedCallback;
+import org.chromium.chrome.browser.payments.PaymentAppFactory.PaymentAppFactoryAddition;
+import org.chromium.content_public.browser.WebContents;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+/** Builds instances of payment apps based on installed third party Android payment apps. */
+public class AndroidPaymentAppFactory implements PaymentAppFactoryAddition {
+    private static final String ACTION_PAY = "org.chromium.intent.action.PAY";
+    private static final String ACTION_IS_READY_TO_PAY =
+            "org.chromium.intent.action.IS_READY_TO_PAY";
+    private static final String METHOD_PREFIX = "https://";
+
+    @Override
+    public void create(Context context, WebContents webContents, Set<String> methods,
+            PaymentAppCreatedCallback callback) {
+        Map<String, AndroidPaymentApp> installedApps = new HashMap<>();
+        PackageManager pm = context.getPackageManager();
+        Intent payIntent = new Intent(ACTION_PAY);
+
+        for (String methodName : methods) {
+            if (!methodName.startsWith(METHOD_PREFIX)) continue;
+
+            payIntent.setData(Uri.parse(methodName));
+            List<ResolveInfo> matches = pm.queryIntentActivities(payIntent, 0);
+            for (int i = 0; i < matches.size(); i++) {
+                ResolveInfo match = matches.get(i);
+                String packageName = match.activityInfo.packageName;
+                AndroidPaymentApp installedApp = installedApps.get(packageName);
+                if (installedApp == null) {
+                    CharSequence label = match.loadLabel(pm);
+                    installedApp =
+                            new AndroidPaymentApp(webContents, packageName, match.activityInfo.name,
+                                    label == null ? "" : label.toString(), match.loadIcon(pm));
+                    callback.onPaymentAppCreated(installedApp);
+                    installedApps.put(packageName, installedApp);
+                }
+                installedApp.addMethodName(methodName);
+            }
+        }
+
+        List<ResolveInfo> matches =
+                pm.queryIntentServices(new Intent(ACTION_IS_READY_TO_PAY), 0);
+        for (int i = 0; i < matches.size(); i++) {
+            ResolveInfo match = matches.get(i);
+            String packageName = match.serviceInfo.packageName;
+            AndroidPaymentApp installedApp = installedApps.get(packageName);
+            if (installedApp != null) installedApp.setIsReadyToPayService(match.serviceInfo.name);
+        }
+
+        callback.onAllPaymentAppsCreated();
+    }
+}