hostage/src/de/tudarmstadt/informatik/hostage/ui2/adapter/ServicesListAdapter.java

package de.tudarmstadt.informatik.hostage.ui2.adapter;

import java.util.List;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.os.Build;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.CompoundButton;
import android.widget.Switch;
import android.widget.TextView;
import de.tudarmstadt.informatik.hostage.R;
import de.tudarmstadt.informatik.hostage.commons.HelperUtils;
import de.tudarmstadt.informatik.hostage.ui2.activity.MainActivity;
import de.tudarmstadt.informatik.hostage.ui2.model.ServicesListItem;

/**
 * @author Daniel Lazar
 * @created 06.02.14.
 * a list adapter for loading switches and service information asynchronously
 */
public class ServicesListAdapter extends ArrayAdapter<ServicesListItem> {
    private final Context context;
    private final List<ServicesListItem> values;
    int sdk = Build.VERSION.SDK_INT;
    private Context mActivity;
    private Switch mServicesSwitch;
    private CompoundButton.OnCheckedChangeListener mListener;

    /**
     * constructor
     *
     * @param context Context of the current activity
     * @param objects List of ServicesListItem which contains all the protocols
     */
    public ServicesListAdapter(Context context, List<ServicesListItem> objects) {
        super(context, R.layout.services_list_item, objects);

        this.context = context;
        this.values = objects;
    }

    /**
     * method to save important information from parent fragment
     *
     * @param activity       activicty from parent fragment
     * @param servicesSwitch the switch from parent fragment
     * @param mainListener   Listener from parent fragment
     */
    public void setActivity(Context activity, Switch servicesSwitch, CompoundButton.OnCheckedChangeListener mainListener) {
        mActivity = activity;
        mServicesSwitch = servicesSwitch;
        mListener = mainListener;
    }

    /**
     * main method of ServicesListAdapter which initializes the holder if null
     * Also activates protocols and switches
     *
     * @param position    current position in list
     * @param convertView
     * @param parent
     * @return
     */
    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        LayoutInflater inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View rowView = convertView;

        ViewHolder holder;

        final ServicesListItem item = values.get(position);

        if (rowView == null) {
            rowView = inflater.inflate(R.layout.services_list_item, parent, false);

            holder = new ViewHolder();
            assert rowView != null;
            holder.protocolName = (TextView) rowView.findViewById(R.id.services_item_name);
            holder.recordedAttacks = (TextView) rowView.findViewById(R.id.services_item_rec_attacks);
            holder.activated = (Switch) rowView.findViewById(R.id.services_item_switch);
            holder.circle = rowView.findViewById(R.id.services_circle);
            rowView.setTag(holder);
        } else {
            holder = (ViewHolder) rowView.getTag();
        }

        holder.protocolName.setText(item.protocol);
        holder.activated.setTag(item);

        this.updateStatus(item, holder);

        holder.activated.setOnCheckedChangeListener(
                new CompoundButton.OnCheckedChangeListener() {
                    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                        ServicesListItem item = (ServicesListItem) buttonView.getTag();

                        if (!HelperUtils.isWifiConnected(mActivity)) {
                            new AlertDialog.Builder(mActivity)
                                    .setTitle(R.string.information)
                                    .setMessage(R.string.wifi_not_connected_msg)
                                    .setPositiveButton(android.R.string.ok,
                                            new DialogInterface.OnClickListener() {
                                                public void onClick(DialogInterface dialog,
                                                                    int which) {
                                                }
                                            }
                                    )
                                    .setIcon(android.R.drawable.ic_dialog_info).show();

                            buttonView.setChecked(false);
                        } else {
                            //check if switch is set to ON and start the concrete listener for the protocol
                            if (isChecked) {
                                if (!MainActivity.getInstance().getHostageService().isRunning(item.protocol)) {
                                    MainActivity.getInstance().getHostageService().startListener(item.protocol);

                                    //set the main switch to null, so that he won't react and starts all protocols
                                    mServicesSwitch.setOnCheckedChangeListener(null);
                                    mServicesSwitch.setChecked(true);
                                    mServicesSwitch.setOnCheckedChangeListener(mListener);
                                    buttonView.setChecked(true);
                                } else if (MainActivity.getInstance().getHostageService().isRunning(item.protocol)) {
                                    buttonView.setChecked(true);
                                }
                            } else {
                                if (MainActivity.getInstance().getHostageService().isRunning(item.protocol)) {
                                    MainActivity.getInstance().getHostageService().stopListener(item.protocol);
                                }
                                buttonView.setChecked(false);
                            }
                        }
                    }
                }
        );
        return rowView;
    }

    /**
     * method to update the current status, which includes changing the attack indication circle and the number of attacks
     *
     * @param item   ServiceListItem which has information about current item, e.g. protocol, activated, attacks
     * @param holder ViewHolder which represents the item in the View
     */
    private void updateStatus(ServicesListItem item, ViewHolder holder) {
        if (MainActivity.getInstance().getHostageService().isRunning(item.protocol)) {
            holder.activated.setChecked(true);
            if (!MainActivity.getInstance().getHostageService().hasProtocolActiveAttacks(item.protocol)) {
                if (item.attacks > 0) {
                    setBackground(holder, R.drawable.services_circle_yellow);
                } else {
                    setBackground(holder, R.drawable.services_circle_green);
                }

            } else {
                if (MainActivity.getInstance().getHostageService().hasProtocolActiveAttacks(item.protocol)) {
                    setBackground(holder, R.drawable.services_circle_red);
                }
            }
        } else if (item.attacks > 0) {
            holder.activated.setChecked(false);
            setBackground(holder, R.drawable.services_circle_yellow);
        } else {
            holder.activated.setChecked(false);
            setBackground(holder, R.drawable.services_circle);
        }
        holder.recordedAttacks
                .setText(String.format(MainActivity.getContext().getResources().getString(R.string.recorded_attacks) + "  %d", Integer.valueOf(item.attacks)));
    }

    /**
     * changes the indicator circle of a service
     *
     * @param holder   ViewHolder which represents the item in the View
     * @param drawable int which represents the ID of the drawable we want to display, e.g. on a present attack it should be R.drawable.services_circle_red
     */
    private void setBackground(ViewHolder holder, int drawable) {
        if (sdk < Build.VERSION_CODES.JELLY_BEAN) {
            holder.circle.setBackgroundDrawable(MainActivity.getInstance().getResources().getDrawable(drawable));
        } else {
            holder.circle.setBackground(MainActivity.getInstance().getResources().getDrawable(drawable));
        }
    }

    /**
     * ViewHolder stands for a row in the view
     */
    private class ViewHolder {

        public TextView protocolName;

        public TextView recordedAttacks;

        public Switch activated;

        public View circle;
    }
}