From 7bcd8afcce33d74c0a04124bad7bbb0663ba45af Mon Sep 17 00:00:00 2001
From: Alan Huang <alanjhhuang@google.com>
Date: Thu, 12 May 2022 08:42:41 +0000
Subject: [PATCH] Add API in SettingsLib/BluetoothUtils to get the control Uri
 from Bluetooth metadata

Bug: 229048602
Test: make -j64 RunSettingsLibRoboTests
Change-Id: I97dec95843eb75e4033dd0ff6ae0b45c638d563f
---
 .../settingslib/bluetooth/BluetoothUtils.java | 40 +++++++++++++++++++
 .../bluetooth/BluetoothUtilsTest.java         | 14 +++++++
 2 files changed, 54 insertions(+)

diff --git a/packages/SettingsLib/src/com/android/settingslib/bluetooth/BluetoothUtils.java b/packages/SettingsLib/src/com/android/settingslib/bluetooth/BluetoothUtils.java
index c9af4d53f9a83..fea7475fc0871 100644
--- a/packages/SettingsLib/src/com/android/settingslib/bluetooth/BluetoothUtils.java
+++ b/packages/SettingsLib/src/com/android/settingslib/bluetooth/BluetoothUtils.java
@@ -30,6 +30,9 @@ import com.android.settingslib.widget.AdaptiveOutlineDrawable;
 
 import java.io.IOException;
 import java.util.List;
+import java.util.Locale;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 
 public class BluetoothUtils {
     private static final String TAG = "BluetoothUtils";
@@ -39,6 +42,8 @@ public class BluetoothUtils {
 
     public static final int META_INT_ERROR = -1;
     public static final String BT_ADVANCED_HEADER_ENABLED = "bt_advanced_header_enabled";
+    private static final int METADATA_FAST_PAIR_CUSTOMIZED_FIELDS = 25;
+    private static final String KEY_HEARABLE_CONTROL_SLICE = "HEARABLE_CONTROL_SLICE_WITH_WIDTH";
 
     private static ErrorListener sErrorListener;
 
@@ -384,8 +389,43 @@ public class BluetoothUtils {
         return Uri.parse(data);
     }
 
+    /**
+     * Get URI Bluetooth metadata for extra control
+     *
+     * @param bluetoothDevice the BluetoothDevice to get metadata
+     * @return the URI metadata
+     */
+    public static String getControlUriMetaData(BluetoothDevice bluetoothDevice) {
+        String data = getStringMetaData(bluetoothDevice, METADATA_FAST_PAIR_CUSTOMIZED_FIELDS);
+        return extraTagValue(KEY_HEARABLE_CONTROL_SLICE, data);
+    }
+
     @SuppressLint("NewApi") // Hidden API made public
     private static boolean doesClassMatch(BluetoothClass btClass, int classId) {
         return btClass.doesClassMatch(classId);
     }
+
+    private static String extraTagValue(String tag, String metaData) {
+        if (TextUtils.isEmpty(metaData)) {
+            return null;
+        }
+        Pattern pattern = Pattern.compile(generateExpressionWithTag(tag, "(.*?)"));
+        Matcher matcher = pattern.matcher(metaData);
+        if (matcher.find()) {
+            return matcher.group(1);
+        }
+        return null;
+    }
+
+    private static String getTagStart(String tag) {
+        return String.format(Locale.ENGLISH, "<%s>", tag);
+    }
+
+    private static String getTagEnd(String tag) {
+        return String.format(Locale.ENGLISH, "</%s>", tag);
+    }
+
+    private static String generateExpressionWithTag(String tag, String value) {
+        return getTagStart(tag) + value + getTagEnd(tag);
+    }
 }
diff --git a/packages/SettingsLib/tests/robotests/src/com/android/settingslib/bluetooth/BluetoothUtilsTest.java b/packages/SettingsLib/tests/robotests/src/com/android/settingslib/bluetooth/BluetoothUtilsTest.java
index 2e855145e1529..1c0ea1a1f4b01 100644
--- a/packages/SettingsLib/tests/robotests/src/com/android/settingslib/bluetooth/BluetoothUtilsTest.java
+++ b/packages/SettingsLib/tests/robotests/src/com/android/settingslib/bluetooth/BluetoothUtilsTest.java
@@ -51,6 +51,11 @@ public class BluetoothUtilsTest {
     private static final String STRING_METADATA = "string_metadata";
     private static final String BOOL_METADATA = "true";
     private static final String INT_METADATA = "25";
+    private static final int METADATA_FAST_PAIR_CUSTOMIZED_FIELDS = 25;
+    private static final String KEY_HEARABLE_CONTROL_SLICE = "HEARABLE_CONTROL_SLICE_WITH_WIDTH";
+    private static final String CONTROL_METADATA =
+            "<HEARABLE_CONTROL_SLICE_WITH_WIDTH>" + STRING_METADATA
+                    + "</HEARABLE_CONTROL_SLICE_WITH_WIDTH>";
 
     @Before
     public void setUp() {
@@ -151,6 +156,15 @@ public class BluetoothUtilsTest {
                 BluetoothDevice.METADATA_MAIN_ICON)).isNull();
     }
 
+    @Test
+    public void getControlUriMetaData_hasMetaData_returnsCorrectMetaData() {
+        when(mBluetoothDevice.getMetadata(METADATA_FAST_PAIR_CUSTOMIZED_FIELDS)).thenReturn(
+                CONTROL_METADATA.getBytes());
+
+        assertThat(BluetoothUtils.getControlUriMetaData(mBluetoothDevice)).isEqualTo(
+                STRING_METADATA);
+    }
+
     @Test
     public void isAdvancedDetailsHeader_untetheredHeadset_returnTrue() {
         when(mBluetoothDevice.getMetadata(