Obey rule instance limit.

Do not show a rule type in the 'Add rule' dialog if the number of
current instances of that rule equals the max number of instances 
allowed by that rule type.

Bug: 25563007
Change-Id: I18f2598c6d92aec93c27755bb6b04c460ee294d0

src/com/android/settings/notification/ServiceListing.java

@@ -35,6 +35,7 @@ import android.util.Slog;
 import com.android.settings.notification.ManagedServiceSettings.Config;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.HashSet;
 import java.util.List;
 
@@ -45,6 +46,7 @@ public class ServiceListing {
     private final HashSet<ComponentName> mEnabledServices = new HashSet<ComponentName>();
     private final List<ServiceInfo> mServices = new ArrayList<ServiceInfo>();
     private final List<Callback> mCallbacks = new ArrayList<Callback>();
+    private final List<ServiceInfo> mApprovedServices = new ArrayList<ServiceInfo>();
 
     private boolean mListening;
 
@@ -93,10 +95,9 @@ public class ServiceListing {
         return getServices(c, null, pm);
     }
 
-    public static ServiceInfo findService(Context context, Config config, final ComponentName cn) {
+    public ServiceInfo findService(Context context, Config config, final ComponentName cn) {
         final ServiceListing listing = new ServiceListing(context, config);
-        final List<ServiceInfo> services = listing.reload();
+        for (ServiceInfo service : mApprovedServices) {
-        for (ServiceInfo service : services) {
             final ComponentName serviceCN = new ComponentName(service.packageName, service.name);
             if (serviceCN.equals(cn)) {
                 return service;
@@ -173,6 +174,26 @@ public class ServiceListing {
         return mServices;
     }
 
+    public void reloadApprovedServices() {
+        mApprovedServices.clear();
+        final String flat = Settings.Secure.getString(mContentResolver, mConfig.setting);
+        if (flat != null && !"".equals(flat)) {
+            final List<String> names = Arrays.asList(flat.split(":"));
+            List<ServiceInfo> services = new ArrayList<>();
+            getServices(mConfig, services, mContext.getPackageManager());
+            for (ServiceInfo service : services) {
+                final ComponentName componentName = service.getComponentName();
+                String flatCn = service.getComponentName().flattenToString();
+                if (names.contains(flatCn) || names.contains(componentName.getPackageName())) {
+                    mApprovedServices.add(service);
+                }
+            }
+            for (Callback callback : mCallbacks) {
+                callback.onServicesReloaded(mApprovedServices);
+            }
+        }
+    }
+
     public boolean isEnabled(ComponentName cn) {
         return mEnabledServices.contains(cn);
     }

src/com/android/settings/notification/ZenModeAutomationSettings.java

@@ -60,14 +60,12 @@ public class ZenModeAutomationSettings extends ZenModeSettingsBase {
         addPreferencesFromResource(R.xml.zen_mode_automation_settings);
         mPm = mContext.getPackageManager();
         mServiceListing = new ServiceListing(mContext, CONFIG);
-        mServiceListing.reload();
+        mServiceListing.reloadApprovedServices();
-        mServiceListing.setListening(true);
     }
 
     @Override
     public void onDestroy() {
         super.onDestroy();
-        mServiceListing.setListening(false);
     }
 
     @Override
@@ -228,7 +226,8 @@ public class ZenModeAutomationSettings extends ZenModeSettingsBase {
             ri.packageName = si.packageName;
             ri.configurationActivity = getSettingsActivity(si);
             ri.packageLabel = si.applicationInfo.loadLabel(pm);
-
+            ri.ruleInstanceLimit =
+                    si.metaData.getInt(ConditionProviderService.META_DATA_RULE_INSTANCE_LIMIT, -1);
             return ri;
         }
         return null;

src/com/android/settings/notification/ZenRuleInfo.java

@@ -12,4 +12,5 @@ public class ZenRuleInfo {
     public ComponentName serviceComponent;
     public boolean isSystem;
     public CharSequence packageLabel;
+    public int ruleInstanceLimit = -1;
 }

src/com/android/settings/notification/ZenRuleSelectionDialog.java

@@ -67,7 +67,7 @@ public abstract class ZenRuleSelectionDialog {
             bindType(defaultNewEvent());
             bindType(defaultNewSchedule());
             mServiceListing.addCallback(mServiceListingCallback);
-            mServiceListing.reload();
+            mServiceListing.reloadApprovedServices();
         }
         mDialog = new AlertDialog.Builder(context)
                 .setTitle(R.string.zen_mode_choose_rule_type)
@@ -166,7 +166,9 @@ public abstract class ZenRuleSelectionDialog {
             for (int i = 0; i < services.size(); i++) {
                 final ZenRuleInfo ri = ZenModeAutomationSettings.getRuleInfo(mPm, services.get(i));
                 if (ri != null && ri.configurationActivity != null
-                        && mNm.isNotificationPolicyAccessGrantedForPackage(ri.packageName)) {
+                        && mNm.isNotificationPolicyAccessGrantedForPackage(ri.packageName)
+                        && (ri.ruleInstanceLimit <= 0 || ri.ruleInstanceLimit
+                        >= (mNm.getRuleInstanceCount(services.get(i).getComponentName()) + 1))) {
                     externalRuleTypes.add(ri);
                 }
             }