piuk.blockchain.android.ui.dialogs.RequestIdentifierDialog.java Source code

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Here is the source code for piuk.blockchain.android.ui.dialogs.RequestIdentifierDialog.java

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/*
 * Copyright 2011-2012 the original author or authors.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package piuk.blockchain.android.ui.dialogs;

import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;

import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.Dialog;
import android.content.DialogInterface;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.view.ContextThemeWrapper;
import android.view.LayoutInflater;
import android.view.View;
import android.view.WindowManager;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import piuk.blockchain.android.R;
import piuk.blockchain.android.ui.InvalidGUIDException;

/**
 * @author Andreas Schildbach
 */
public final class RequestIdentifierDialog extends DialogFragment {
    private static final String FRAGMENT_TAG = RequestIdentifierDialog.class.getName();

    public interface SuccessCallback {
        public void onSuccess(String guid);

        public void onFail(String message);
    }

    private SuccessCallback callback = null;
    private static List<WeakReference<RequestIdentifierDialog>> fragmentRefs = new ArrayList<WeakReference<RequestIdentifierDialog>>();

    public static void hide() {
        for (WeakReference<RequestIdentifierDialog> fragmentRef : fragmentRefs) {
            if (fragmentRef != null && fragmentRef.get() != null) {
                try {
                    fragmentRef.get().dismissAllowingStateLoss();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
    }

    public static DialogFragment show(final FragmentManager fm, SuccessCallback callback) {

        final DialogFragment prev = (DialogFragment) fm.findFragmentById(R.layout.wallet_identifier_dialog);

        final FragmentTransaction ft = fm.beginTransaction();

        if (prev != null) {
            prev.dismiss();
            ft.remove(prev);
        }

        ft.addToBackStack(null);

        final RequestIdentifierDialog newFragment = instance();

        newFragment.show(ft, FRAGMENT_TAG);

        newFragment.callback = callback;

        return newFragment;
    }

    private static RequestIdentifierDialog instance() {
        final RequestIdentifierDialog fragment = new RequestIdentifierDialog();

        fragmentRefs.add(new WeakReference<RequestIdentifierDialog>(fragment));

        return fragment;
    }

    @Override
    public void onCancel(DialogInterface dialog) {
        callback.onFail("User Cancelled");
    }

    public static void validateGUIDorThrow(String input_guid) throws InvalidGUIDException {
        if (input_guid == null)
            throw new InvalidGUIDException();

        if (input_guid.length() != 36)
            throw new InvalidGUIDException();
        try {
            input_guid = UUID.fromString(input_guid).toString(); //Check is valid uuid format
        } catch (IllegalArgumentException e) {
            throw new InvalidGUIDException();
        }
    }

    @Override
    public Dialog onCreateDialog(final Bundle savedInstanceState) {
        final FragmentActivity activity = getActivity();
        final LayoutInflater inflater = LayoutInflater.from(activity);

        final Builder dialog = new AlertDialog.Builder(new ContextThemeWrapper(activity, R.style.Theme_Dialog));

        dialog.setTitle(R.string.wallet_identifier_title);

        final View view = inflater.inflate(R.layout.wallet_identifier_dialog, null);

        dialog.setView(view);

        final Button continueButton = (Button) view.findViewById(R.id.identifier_continue);

        continueButton.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {

                try {
                    final TextView identifierField = (TextView) view.findViewById(R.id.identifier_field);

                    final String guid = identifierField.getText().toString();

                    validateGUIDorThrow(guid);

                    callback.onSuccess(guid);

                    dismiss();
                } catch (Exception e) {
                    e.printStackTrace();

                    dismiss();

                    callback.onFail(e.getLocalizedMessage());
                }
            }
        });

        Dialog d = dialog.create();

        WindowManager.LayoutParams lp = new WindowManager.LayoutParams();

        lp.dimAmount = 0;
        lp.width = WindowManager.LayoutParams.FILL_PARENT;
        lp.height = WindowManager.LayoutParams.WRAP_CONTENT;

        d.show();

        d.getWindow().setAttributes(lp);

        d.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));

        return d;
    }
}