Slice of Provider Model: add slice structure

Implement a slice which can show/update carrier networks.
Before and after: go/b173971144screenshot

Bug: 173971144
Test: atest NetworkProviderWorkerTest  (PASS)
atest ProviderModelSliceTest  (PASS)

Change-Id: I3f0dab364c88723ef3185a2ff040b1fbd1b099f4

src/com/android/settings/network/ProviderModelSlice.java

@@ -0,0 +1,204 @@
+/*
+ * Copyright (C) 2020 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.settings.network;
+
+
+import static android.app.slice.Slice.EXTRA_TOGGLE_STATE;
+
+import static com.android.settings.slices.CustomSliceRegistry.PROVIDER_MODEL_SLICE_URI;
+
+import android.app.settings.SettingsEnums;
+import android.content.Context;
+import android.content.Intent;
+import android.net.Uri;
+import android.telephony.SubscriptionManager;
+import android.util.Log;
+
+import androidx.annotation.VisibleForTesting;
+import androidx.slice.Slice;
+import androidx.slice.builders.ListBuilder;
+
+import com.android.settings.R;
+import com.android.settings.SubSettings;
+import com.android.settings.network.telephony.MobileNetworkUtils;
+import com.android.settings.network.telephony.NetworkProviderWorker;
+import com.android.settings.slices.CustomSliceable;
+import com.android.settings.slices.SliceBackgroundWorker;
+import com.android.settings.slices.SliceBuilderUtils;
+import com.android.settings.wifi.slice.WifiSlice;
+import com.android.settings.wifi.slice.WifiSliceItem;
+import com.android.wifitrackerlib.WifiEntry;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+/**
+ * {@link CustomSliceable} for Wi-Fi and mobile data connection, used by generic clients.
+ */
+// ToDo If the provider model become default design in the future, the code needs to refactor
+// the whole structure and use new "data object", and then split provider model out of old design.
+public class ProviderModelSlice extends WifiSlice {
+
+    private static final String TAG = "ProviderModelSlice";
+    private final ProviderModelSliceHelper mHelper;
+
+    public ProviderModelSlice(Context context) {
+        super(context);
+        mHelper = getHelper();
+    }
+
+    @Override
+    public Uri getUri() {
+        return PROVIDER_MODEL_SLICE_URI;
+    }
+
+    private static void log(String s) {
+        Log.d(TAG, s);
+    }
+
+    protected boolean isApRowCollapsed() {
+        return false;
+    }
+
+    @Override
+    public Slice getSlice() {
+        // The provider model slice step:
+        // First section:  Add a Wi-Fi item which state is connected.
+        // Second section:  Add a carrier item.
+        // Third section:  Add the Wi-Fi items which are not connected.
+        // Fourth section:  If device has connection problem, this row show the message for user.
+
+        if (mHelper.isAirplaneModeEnabled()) {
+            log("Airplane mode is enabled.");
+            // ToDo Next CL will add the Airplane mode Message.
+            return mHelper.createListBuilder(getUri()).build();
+        }
+
+        int maxListSize = 0;
+        List<WifiSliceItem> wifiList = null;
+        final NetworkProviderWorker worker = getWorker();
+        if (worker != null) {
+            // get Wi-Fi list.
+            wifiList = worker.getResults();
+            maxListSize = worker.getApRowCount();
+        } else {
+            log("network provider worker is null.");
+        }
+
+        final boolean hasCarrier = mHelper.hasCarrier();
+        log("hasCarrier: " + hasCarrier);
+
+
+        final ListBuilder listBuilder = mHelper.createListBuilder(getUri());
+
+        // First section:  Add a Wi-Fi item which state is connected.
+        final WifiSliceItem connectedWifiItem = mHelper.getConnectedWifiItem(wifiList);
+        if (connectedWifiItem != null) {
+            log("get Wi-Fi item witch is connected");
+            listBuilder.addRow(getWifiSliceItemRow(connectedWifiItem));
+            maxListSize--;
+        }
+
+        // Second section:  Add a carrier item.
+        if (hasCarrier) {
+            listBuilder.addRow(mHelper.createCarrierRow());
+            maxListSize--;
+        }
+
+        // Third section:  Add the Wi-Fi items which are not connected.
+        if (wifiList != null) {
+            log("get Wi-Fi items which are not connected");
+            final List<WifiSliceItem> disconnectedWifiList = wifiList.stream()
+                    .filter(wifiSliceItem -> wifiSliceItem.getConnectedState()
+                            != WifiEntry.CONNECTED_STATE_CONNECTED)
+                    .limit(maxListSize)
+                    .collect(Collectors.toList());
+            for (WifiSliceItem item : disconnectedWifiList) {
+                listBuilder.addRow(getWifiSliceItemRow(item));
+            }
+        }
+
+        // Fourth section:  If device has connection problem, this row show the message for user.
+        // 1) show non_carrier_network_unavailable:
+        //    - while no wifi item
+        // 2) show all_network_unavailable:
+        //    - while no wifi item + no carrier
+        //    - while no wifi item + no data capability
+        if (worker == null || wifiList == null) {
+            log("wifiList is null");
+            int resId = R.string.non_carrier_network_unavailable;
+            if (!hasCarrier || mHelper.isNoCarrierData()) {
+                log("No carrier item or no carrier data.");
+                resId = R.string.all_network_unavailable;
+            }
+
+            if (!hasCarrier) {
+                // If there is no item in ProviderModelItem, slice needs a header.
+                listBuilder.setHeader(mHelper.createHeader());
+            }
+            listBuilder.addGridRow(mHelper.createMessageGridRow(resId));
+        }
+
+        return listBuilder.build();
+    }
+
+    /**
+     * Update the current carrier's mobile data status.
+     */
+    @Override
+    public void onNotifyChange(Intent intent) {
+        final SubscriptionManager subscriptionManager = mHelper.getSubscriptionManager();
+        if (subscriptionManager == null) {
+            return;
+        }
+        final boolean newState = intent.getBooleanExtra(EXTRA_TOGGLE_STATE,
+                mHelper.isMobileDataEnabled());
+        final int defaultSubId = subscriptionManager.getDefaultDataSubscriptionId();
+        log("defaultSubId:" + defaultSubId);
+        if (!SubscriptionManager.isUsableSubscriptionId(defaultSubId)) {
+            return; // No subscription - do nothing.
+        }
+
+        MobileNetworkUtils.setMobileDataEnabled(mContext, defaultSubId, newState,
+                false /* disableOtherSubscriptions */);
+    }
+
+    @Override
+    public Intent getIntent() {
+        final String screenTitle = mContext.getText(R.string.provider_internet_settings).toString();
+        return SliceBuilderUtils.buildSearchResultPageIntent(mContext,
+                NetworkProviderSettings.class.getName(), "" /* key */, screenTitle,
+                SettingsEnums.SLICE)
+                .setClassName(mContext.getPackageName(), SubSettings.class.getName())
+                .setData(getUri());
+    }
+
+    @Override
+    public Class getBackgroundWorkerClass() {
+        return NetworkProviderWorker.class;
+    }
+
+    @VisibleForTesting
+    ProviderModelSliceHelper getHelper() {
+        return new ProviderModelSliceHelper(mContext, this);
+    }
+
+    @VisibleForTesting
+    NetworkProviderWorker getWorker() {
+        return SliceBackgroundWorker.getInstance(getUri());
+    }
+}