1 files changed, 92 insertions, 0 deletions
diff --git a/java/com/android/dialer/util/UriUtils.java b/java/com/android/dialer/util/UriUtils.java
new file mode 100644
index 000000000..c4308a835
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+++ b/java/com/android/dialer/util/UriUtils.java
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+/*
+ * Copyright (C) 2011 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.util;
+
+import android.net.Uri;
+import android.provider.ContactsContract;
+import java.util.List;
+
+/** Utility methods for dealing with URIs. */
+public class UriUtils {
+
+  private static final String LOOKUP_URI_ENCODED = "encoded";
+
+  /** Static helper, not instantiable. */
+  private UriUtils() {}
+
+  /** Checks whether two URI are equal, taking care of the case where either is null. */
+  public static boolean areEqual(Uri uri1, Uri uri2) {
+    if (uri1 == null && uri2 == null) {
+      return true;
+    }
+    if (uri1 == null || uri2 == null) {
+      return false;
+    }
+    return uri1.equals(uri2);
+  }
+
+  /** Parses a string into a URI and returns null if the given string is null. */
+  public static Uri parseUriOrNull(String uriString) {
+    if (uriString == null) {
+      return null;
+    }
+    return Uri.parse(uriString);
+  }
+
+  /** Converts a URI into a string, returns null if the given URI is null. */
+  public static String uriToString(Uri uri) {
+    return uri == null ? null : uri.toString();
+  }
+
+  public static boolean isEncodedContactUri(Uri uri) {
+    if (uri == null) {
+      return false;
+    }
+    final String lastPathSegment = uri.getLastPathSegment();
+    if (lastPathSegment == null) {
+      return false;
+    }
+    return lastPathSegment.equals(LOOKUP_URI_ENCODED);
+  }
+
+  /**
+   * @return {@code uri} as-is if the authority is of contacts provider. Otherwise or {@code uri} is
+   *     null, return null otherwise
+   */
+  public static Uri nullForNonContactsUri(Uri uri) {
+    if (uri == null) {
+      return null;
+    }
+    return ContactsContract.AUTHORITY.equals(uri.getAuthority()) ? uri : null;
+  }
+
+  /** Parses the given URI to determine the original lookup key of the contact. */
+  public static String getLookupKeyFromUri(Uri lookupUri) {
+    // Would be nice to be able to persist the lookup key somehow to avoid having to parse
+    // the uri entirely just to retrieve the lookup key, but every uri is already parsed
+    // once anyway to check if it is an encoded JSON uri, so this has negligible effect
+    // on performance.
+    if (lookupUri != null && !UriUtils.isEncodedContactUri(lookupUri)) {
+      final List<String> segments = lookupUri.getPathSegments();
+      // This returns the third path segment of the uri, where the lookup key is located.
+      // See {@link android.provider.ContactsContract.Contacts#CONTENT_LOOKUP_URI}.
+      return (segments.size() < 3) ? null : Uri.encode(segments.get(2));
+    } else {
+      return null;
+    }
+  }
+}