1 files changed, 107 insertions, 0 deletions
diff --git a/java/com/android/dialer/assisteddialing/CountryCodeProvider.java b/java/com/android/dialer/assisteddialing/CountryCodeProvider.java
new file mode 100644
index 000000000..b12b3ddc0
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+++ b/java/com/android/dialer/assisteddialing/CountryCodeProvider.java
@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.dialer.assisteddialing;
+
+import android.annotation.TargetApi;
+import android.os.Build.VERSION_CODES;
+import android.support.annotation.VisibleForTesting;
+import android.text.TextUtils;
+import android.util.ArraySet;
+import com.android.dialer.common.LogUtil;
+import com.android.dialer.configprovider.ConfigProvider;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Locale;
+import java.util.Set;
+import java.util.StringTokenizer;
+import java.util.stream.Collectors;
+
+/** A class to provide the appropriate country codes related to assisted dialing. */
+@TargetApi(VERSION_CODES.N)
+@SuppressWarnings("AndroidApiChecker") // Java 8 APIs
+final class CountryCodeProvider {
+
+  // TODO(erfanian): Ensure the below standard is consistent between libphonenumber and the
+  // platform.
+  // ISO 3166-1 alpha-2 Country Codes that are eligible for assisted dialing.
+  @VisibleForTesting
+  static final List<String> DEFAULT_COUNTRY_CODES =
+      Arrays.asList(
+          "CA" /* Canada */,
+          "GB" /* United Kingdom */,
+          "JP" /* Japan */,
+          "MX" /* Mexico */,
+          "US" /* United States */);
+
+  private final Set<String> supportedCountryCodes;
+
+  CountryCodeProvider(ConfigProvider configProvider) {
+    supportedCountryCodes =
+        parseConfigProviderCountryCodes(
+                configProvider.getString("assisted_dialing_csv_country_codes", ""))
+            .stream()
+            .map(v -> v.toUpperCase(Locale.US))
+            .collect(Collectors.toCollection(ArraySet::new));
+    LogUtil.i(
+        "CountryCodeProvider.CountryCodeProvider", "Using country codes: " + supportedCountryCodes);
+  }
+
+  /** Checks whether a supplied country code is supported. */
+  public boolean isSupportedCountryCode(String countryCode) {
+    return supportedCountryCodes.contains(countryCode);
+  }
+
+  private List<String> parseConfigProviderCountryCodes(String configProviderCountryCodes) {
+    if (TextUtils.isEmpty(configProviderCountryCodes)) {
+      LogUtil.i(
+          "Constraints.parseConfigProviderCountryCodes",
+          "configProviderCountryCodes was empty, returning default");
+      return DEFAULT_COUNTRY_CODES;
+    }
+
+    StringTokenizer tokenizer = new StringTokenizer(configProviderCountryCodes, ",");
+
+    if (tokenizer.countTokens() < 1) {
+      LogUtil.i(
+          "Constraints.parseConfigProviderCountryCodes", "insufficient provided country codes");
+      return DEFAULT_COUNTRY_CODES;
+    }
+
+    List<String> parsedCountryCodes = new ArrayList<>();
+    while (tokenizer.hasMoreTokens()) {
+      String foundLocale = tokenizer.nextToken();
+      if (foundLocale == null) {
+        LogUtil.i(
+            "Constraints.parseConfigProviderCountryCodes",
+            "Unexpected empty value, returning default.");
+        return DEFAULT_COUNTRY_CODES;
+      }
+
+      if (foundLocale.length() != 2) {
+        LogUtil.i(
+            "Constraints.parseConfigProviderCountryCodes",
+            "Unexpected locale %s, returning default",
+            foundLocale);
+        return DEFAULT_COUNTRY_CODES;
+      }
+
+      parsedCountryCodes.add(foundLocale);
+    }
+    return parsedCountryCodes;
+  }
+}