/*
 * Copyright (C) 2015 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 android.content.pm;

import android.content.ComponentName;
import android.content.Intent;
import android.content.pm.PackageManager.NameNotFoundException;
import android.util.SparseArray;

import java.util.List;

/**
 * Package manager local system service interface.
 *
 * @hide Only for use within the system server.
 */
public abstract class PackageManagerInternal {

    /**
     * Provider for package names.
     */
    public interface PackagesProvider {

        /**
         * Gets the packages for a given user.
         * @param userId The user id.
         * @return The package names.
         */
        public String[] getPackages(int userId);
    }

    /**
     * Provider for package names.
     */
    public interface SyncAdapterPackagesProvider {

        /**
         * Gets the sync adapter packages for given authority and user.
         * @param authority The authority.
         * @param userId The user id.
         * @return The package names.
         */
        public String[] getPackages(String authority, int userId);
    }

    /**
     * Sets the location provider packages provider.
     * @param provider The packages provider.
     */
    public abstract void setLocationPackagesProvider(PackagesProvider provider);

    /**
     * Sets the voice interaction packages provider.
     * @param provider The packages provider.
     */
    public abstract void setVoiceInteractionPackagesProvider(PackagesProvider provider);

    /**
     * Sets the SMS packages provider.
     * @param provider The packages provider.
     */
    public abstract void setSmsAppPackagesProvider(PackagesProvider provider);

    /**
     * Sets the dialer packages provider.
     * @param provider The packages provider.
     */
    public abstract void setDialerAppPackagesProvider(PackagesProvider provider);

    /**
     * Sets the sim call manager packages provider.
     * @param provider The packages provider.
     */
    public abstract void setSimCallManagerPackagesProvider(PackagesProvider provider);

    /**
     * Sets the sync adapter packages provider.
     * @param provider The provider.
     */
    public abstract void setSyncAdapterPackagesprovider(SyncAdapterPackagesProvider provider);

    /**
     * Requests granting of the default permissions to the current default SMS app.
     * @param packageName The default SMS package name.
     * @param userId The user for which to grant the permissions.
     */
    public abstract void grantDefaultPermissionsToDefaultSmsApp(String packageName, int userId);

    /**
     * Requests granting of the default permissions to the current default dialer app.
     * @param packageName The default dialer package name.
     * @param userId The user for which to grant the permissions.
     */
    public abstract void grantDefaultPermissionsToDefaultDialerApp(String packageName, int userId);

    /**
     * Requests granting of the default permissions to the current default sim call manager.
     * @param packageName The default sim call manager package name.
     * @param userId The user for which to grant the permissions.
     */
    public abstract void grantDefaultPermissionsToDefaultSimCallManager(String packageName,
            int userId);

    /**
     * Sets a list of apps to keep in PM's internal data structures and as APKs even if no user has
     * currently installed it. The apps are not preloaded.
     * @param packageList List of package names to keep cached.
     */
    public abstract void setKeepUninstalledPackages(List<String> packageList);

    /**
     * Gets whether some of the permissions used by this package require a user
     * review before any of the app components can run.
     * @param packageName The package name for which to check.
     * @param userId The user under which to check.
     * @return True a permissions review is required.
     */
    public abstract boolean isPermissionsReviewRequired(String packageName, int userId);

    /**
     * Gets all of the information we know about a particular package.
     *
     * @param packageName The package name to find.
     * @param userId The user under which to check.
     *
     * @return An {@link ApplicationInfo} containing information about the
     *         package, or {@code null} if no application exists with that
     *         package name.
     */
    public abstract ApplicationInfo getApplicationInfo(String packageName, int userId);

    /**
     * Interface to {@link com.android.server.pm.PackageManagerService#getHomeActivitiesAsUser}.
     */
    public abstract ComponentName getHomeActivitiesAsUser(List<ResolveInfo> allHomeCandidates,
            int userId);

    /**
     * Called by DeviceOwnerManagerService to set the package names of device owner and profile
     * owners.
     */
    public abstract void setDeviceAndProfileOwnerPackages(
            int deviceOwnerUserId, String deviceOwner, SparseArray<String> profileOwners);

    /**
     * Returns {@code true} if a given package can't be wiped. Otherwise, returns {@code false}.
     */
    public abstract boolean isPackageDataProtected(int userId, String packageName);

    /**
     * Returns {@code true} if a given package is installed as ephemeral. Otherwise, returns
     * {@code false}.
     */
    public abstract boolean isPackageEphemeral(int userId, String packageName);

    /**
     * Gets whether the package was ever launched.
     * @param packageName The package name.
     * @param userId The user for which to check.
     * @return Whether was launched.
     */
    public abstract boolean wasPackageEverLaunched(String packageName, int userId);

    /**
     * Grants a runtime permission
     * @param packageName The package name.
     * @param name The name of the permission.
     * @param userId The userId for which to grant the permission.
     * @param overridePolicy If true, grant this permission even if it is fixed by policy.
     */
    public abstract void grantRuntimePermission(String packageName, String name, int userId,
            boolean overridePolicy);

    /**
     * Revokes a runtime permission
     * @param packageName The package name.
     * @param name The name of the permission.
     * @param userId The userId for which to revoke the permission.
     * @param overridePolicy If true, revoke this permission even if it is fixed by policy.
     */
    public abstract void revokeRuntimePermission(String packageName, String name, int userId,
            boolean overridePolicy);

    /**
     * Retrieve the official name associated with a uid. This name is
     * guaranteed to never change, though it is possible for the underlying
     * uid to be changed. That is, if you are storing information about
     * uids in persistent storage, you should use the string returned
     * by this function instead of the raw uid.
     *
     * @param uid The uid for which you would like to retrieve a name.
     * @return Returns a unique name for the given uid, or null if the
     * uid is not currently assigned.
     */
    public abstract String getNameForUid(int uid);

    /**
     * Request to perform the second phase of ephemeral resolution.
     * @param responseObj The response of the first phase of ephemeral resolution
     * @param origIntent The original intent that triggered ephemeral resolution
     * @param resolvedType The resolved type of the intent
     * @param launchIntent The intent that would launch if there was no ephemeral application
     * @param callingPackage The name of the package requesting the ephemeral application
     * @param userId The ID of the user that triggered ephemeral resolution
     */
    public abstract void requestEphemeralResolutionPhaseTwo(EphemeralResponse responseObj,
            Intent origIntent, String resolvedType, Intent launchIntent, String callingPackage,
            int userId);

    /**
     * Grants access to the package metadata for an ephemeral application.
     * <p>
     * When an ephemeral application explicitly tries to interact with a full
     * install application [via an activity, service or provider that has been
     * exposed using the {@code visibleToInstantApp} attribute], the normal
     * application must be able to see metadata about the connecting ephemeral
     * app. If the ephemeral application uses an implicit intent [ie action VIEW,
     * category BROWSABLE], it remains hidden from the launched activity.
     * <p>
     * If the {@code sourceUid} is not for an ephemeral app or {@code targetUid}
     * is not for a fully installed app, this method will be a no-op.
     *
     * @param userId the user
     * @param intent the intent that triggered the grant
     * @param targetAppId The app ID of the fully installed application
     * @param ephemeralAppId The app ID of the ephemeral application
     */
    public abstract void grantEphemeralAccess(int userId, Intent intent,
            int targetAppId, int ephemeralAppId);

    /**
     * @return The SetupWizard package name.
     */
    public abstract String getSetupWizardPackageName();

    public interface ExternalSourcesPolicy {

        int USER_TRUSTED = 0;   // User has trusted the package to install apps
        int USER_BLOCKED = 1;   // User has blocked the package to install apps
        int USER_DEFAULT = 2;   // Default code to use when user response is unavailable

        /**
         * Checks the user preference for whether a package is trusted to request installs through
         * package installer
         *
         * @param packageName The package to check for
         * @param uid the uid in which the package is running
         * @return {@link USER_TRUSTED} if the user has trusted the package, {@link USER_BLOCKED}
         * if user has blocked requests from the package, {@link USER_DEFAULT} if the user response
         * is not yet available
         */
        int getPackageTrustedToInstallApps(String packageName, int uid);
    }

    public abstract void setExternalSourcesPolicy(ExternalSourcesPolicy policy);

    /**
     * Get all overlay packages for a user.
     * @param userId The user for which to get the overlays.
     * @return A list of overlay packages. An empty list is returned if the
     *         user has no installed overlay packages.
     */
    public abstract List<PackageInfo> getOverlayPackages(int userId);

    /**
     * Get the names of all target packages for a user.
     * @param userId The user for which to get the package names.
     * @return A list of target package names. This list includes the "android" package.
     */
    public abstract List<String> getTargetPackageNames(int userId);

    /**
     * Set which overlay to use for a package.
     * @param userId The user for which to update the overlays.
     * @param targetPackageName The package name of the package for which to update the overlays.
     * @param overlayPackageNames The complete list of overlay packages that should be enabled for
     *                            the target. Previously enabled overlays not specified in the list
     *                            will be disabled. Pass in null or an empty list to disable
     *                            all overlays. The order of the items is significant if several
     *                            overlays modify the same resource.
     * @return true if all packages names were known by the package manager, false otherwise
     */
    public abstract boolean setEnabledOverlayPackages(int userId, String targetPackageName,
            List<String> overlayPackageNames);
}