/*
* Copyright (C) 2017 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.googlecode.android_scripting;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.SharedPreferences;
import android.content.DialogInterface.OnCancelListener;
import android.os.AsyncTask;
import android.preference.PreferenceManager;
import com.googlecode.android_scripting.exception.Sl4aException;
import com.googlecode.android_scripting.interpreter.InterpreterConstants;
import com.googlecode.android_scripting.interpreter.InterpreterDescriptor;
import com.googlecode.android_scripting.interpreter.InterpreterUtils;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
/**
* AsyncTask for uninstalling interpreters.
*
*/
public abstract class InterpreterUninstaller extends AsyncTask<Void, Void, Boolean> {
protected final InterpreterDescriptor mDescriptor;
protected final Context mContext;
protected final ProgressDialog mDialog;
protected final AsyncTaskListener<Boolean> mListener;
protected final String mInterpreterRoot;
public InterpreterUninstaller(InterpreterDescriptor descriptor, Context context,
AsyncTaskListener<Boolean> listener) throws Sl4aException {
super();
mDescriptor = descriptor;
mContext = context;
mListener = listener;
String packageName = mDescriptor.getClass().getPackage().getName();
if (packageName.length() == 0) {
throw new Sl4aException("Interpreter package name is empty.");
}
mInterpreterRoot = InterpreterConstants.SDCARD_ROOT + packageName;
if (mDescriptor == null) {
throw new Sl4aException("Interpreter description not provided.");
}
if (mDescriptor.getName() == null) {
throw new Sl4aException("Interpreter not specified.");
}
if (!isInstalled()) {
throw new Sl4aException("Interpreter not installed.");
}
if (context != null) {
mDialog = new ProgressDialog(context);
} else {
mDialog = null;
}
}
public final void execute() {
execute(null, null, null);
}
@Override
protected void onPreExecute() {
if (mDialog != null) {
mDialog.setMessage("Uninstalling " + mDescriptor.getNiceName());
mDialog.setIndeterminate(true);
mDialog.setOnCancelListener(new OnCancelListener() {
@Override
public void onCancel(DialogInterface dialog) {
cancel(true);
}
});
mDialog.show();
}
}
@Override
protected void onPostExecute(Boolean result) {
if (mDialog != null && mDialog.isShowing()) {
mDialog.dismiss();
}
if (result) {
mListener.onTaskFinished(result, "Uninstallation successful.");
} else {
mListener.onTaskFinished(result, "Uninstallation failed.");
}
}
@Override
protected Boolean doInBackground(Void... params) {
List<File> directories = new ArrayList<File>();
directories.add(new File(mInterpreterRoot));
if (mDescriptor.hasInterpreterArchive()) {
directories.add(InterpreterUtils.getInterpreterRoot(mContext, mDescriptor.getName()));
}
for (File directory : directories) {
FileUtils.delete(directory);
}
return cleanup();
}
protected boolean isInstalled() {
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(mContext);
return preferences.getBoolean(InterpreterConstants.INSTALLED_PREFERENCE_KEY, false);
}
protected abstract boolean cleanup();
}