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/*
 * Copyright (C) 2013 Bahtiar 'kalkin' Gadimov
 * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
 *
 * 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 org.sufficientlysecure.keychain.ui;

import java.util.Date;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.spongycastle.openpgp.PGPPublicKey;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.pgp.PgpKeyHelper;
import org.sufficientlysecure.keychain.provider.KeychainContract.KeyRings;
import org.sufficientlysecure.keychain.provider.ProviderHelper;
import org.sufficientlysecure.keychain.util.Log;

import android.os.Bundle;
import android.text.format.DateFormat;
import android.widget.TextView;

import com.actionbarsherlock.app.SherlockActivity;

public class KeyDetailsActivity extends SherlockActivity {

    private PGPPublicKey publicKey;
    private TextView mAlgorithm;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        Bundle extras = getIntent().getExtras();
        setContentView(R.layout.key_view);
        if (extras == null) {
            return;
        }

        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setHomeButtonEnabled(true);

        long key = extras.getLong("key");

        KeyRings.buildPublicKeyRingsByMasterKeyIdUri(key + "");
        String[] projection = new String[] { "" };

        this.publicKey = ProviderHelper.getPGPPublicKeyByKeyId(getApplicationContext(), key);

        TextView fingerprint = (TextView) this.findViewById(R.id.fingerprint);
        fingerprint.setText(PgpKeyHelper.shortifyFingerprint(PgpKeyHelper.getFingerPrint(
                getApplicationContext(), key)));
        String[] mainUserId = splitUserId("");

        TextView expiry = (TextView) this.findViewById(R.id.expiry);
        Date expiryDate = PgpKeyHelper.getExpiryDate(publicKey);
        if (expiryDate == null) {
            expiry.setText("");
        } else {
            expiry.setText(DateFormat.getDateFormat(getApplicationContext()).format(expiryDate));
        }

        TextView creation = (TextView) this.findViewById(R.id.creation);
        creation.setText(DateFormat.getDateFormat(getApplicationContext()).format(
                PgpKeyHelper.getCreationDate(publicKey)));
        mAlgorithm = (TextView) this.findViewById(R.id.algorithm);
        mAlgorithm.setText(PgpKeyHelper.getAlgorithmInfo(publicKey));

    }

    private String[] splitUserId(String userId) {

        String[] result = new String[] { "", "", "" };
        Log.v("UserID", userId);

        Pattern withComment = Pattern.compile("^(.*) [(](.*)[)] <(.*)>$");
        Matcher matcher = withComment.matcher(userId);
        if (matcher.matches()) {
            result[0] = matcher.group(1);
            result[1] = matcher.group(2);
            result[2] = matcher.group(3);
            return result;
        }

        Pattern withoutComment = Pattern.compile("^(.*) <(.*)>$");
        matcher = withoutComment.matcher(userId);
        if (matcher.matches()) {
            result[0] = matcher.group(1);
            result[1] = matcher.group(2);
            return result;
        }
        return result;
    }
}