src/com/android/contacts/ContactsUtils.java

/*
 * Copyright (C) 2009 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.android.contacts;

import android.content.Context;
import android.content.Intent;
import android.location.CountryDetector;
import android.provider.ContactsContract.CommonDataKinds.Im;
import android.provider.ContactsContract.CommonDataKinds.Phone;
import android.telephony.PhoneNumberUtils;
import android.text.TextUtils;

public class ContactsUtils {
    private static final String TAG = "ContactsUtils";
    private static final String WAIT_SYMBOL_AS_STRING = String.valueOf(PhoneNumberUtils.WAIT);


    // TODO find a proper place for the canonical version of these
    public interface ProviderNames {
        String YAHOO = "Yahoo";
        String GTALK = "GTalk";
        String MSN = "MSN";
        String ICQ = "ICQ";
        String AIM = "AIM";
        String XMPP = "XMPP";
        String JABBER = "JABBER";
        String SKYPE = "SKYPE";
        String QQ = "QQ";
    }

    /**
     * This looks up the provider name defined in
     * ProviderNames from the predefined IM protocol id.
     * This is used for interacting with the IM application.
     *
     * @param protocol the protocol ID
     * @return the provider name the IM app uses for the given protocol, or null if no
     * provider is defined for the given protocol
     * @hide
     */
    public static String lookupProviderNameFromId(int protocol) {
        switch (protocol) {
            case Im.PROTOCOL_GOOGLE_TALK:
                return ProviderNames.GTALK;
            case Im.PROTOCOL_AIM:
                return ProviderNames.AIM;
            case Im.PROTOCOL_MSN:
                return ProviderNames.MSN;
            case Im.PROTOCOL_YAHOO:
                return ProviderNames.YAHOO;
            case Im.PROTOCOL_ICQ:
                return ProviderNames.ICQ;
            case Im.PROTOCOL_JABBER:
                return ProviderNames.JABBER;
            case Im.PROTOCOL_SKYPE:
                return ProviderNames.SKYPE;
            case Im.PROTOCOL_QQ:
                return ProviderNames.QQ;
        }
        return null;
    }

    /**
     * Test if the given {@link CharSequence} contains any graphic characters,
     * first checking {@link TextUtils#isEmpty(CharSequence)} to handle null.
     */
    public static boolean isGraphic(CharSequence str) {
        return !TextUtils.isEmpty(str) && TextUtils.isGraphic(str);
    }

    /**
     * Returns true if two objects are considered equal.  Two null references are equal here.
     */
    public static boolean areObjectsEqual(Object a, Object b) {
        return a == b || (a != null && a.equals(b));
    }

    /**
     * Returns true if two data with mimetypes which represent values in contact entries are
     * considered equal for collapsing in the GUI. For caller-id, use
     * {@link PhoneNumberUtils#compare(Context, String, String)} instead
     */
    public static final boolean shouldCollapse(Context context, CharSequence mimetype1,
            CharSequence data1, CharSequence mimetype2, CharSequence data2) {
        if (TextUtils.equals(Phone.CONTENT_ITEM_TYPE, mimetype1)
                && TextUtils.equals(Phone.CONTENT_ITEM_TYPE, mimetype2)) {
            if (data1 == data2) {
                return true;
            }
            if (data1 == null || data2 == null) {
                return false;
            }

            // If the number contains semicolons, PhoneNumberUtils.compare
            // only checks the substring before that (which is fine for caller-id usually)
            // but not for collapsing numbers. so we check each segment indidually to be more strict
            // TODO: This should be replaced once we have a more robust phonenumber-library
            String[] dataParts1 = data1.toString().split(WAIT_SYMBOL_AS_STRING);
            String[] dataParts2 = data2.toString().split(WAIT_SYMBOL_AS_STRING);
            if (dataParts1.length != dataParts2.length) {
                return false;
            }
            for (int i = 0; i < dataParts1.length; i++) {
                if (!PhoneNumberUtils.compare(context, dataParts1[i], dataParts2[i])) {
                    return false;
                }
            }

            return true;
        } else {
            if (mimetype1 == mimetype2 && data1 == data2) {
                return true;
            }
            return TextUtils.equals(mimetype1, mimetype2) && TextUtils.equals(data1, data2);
        }
    }

    /**
     * Returns true if two {@link Intent}s are both null, or have the same action.
     */
    public static final boolean areIntentActionEqual(Intent a, Intent b) {
        if (a == b) {
            return true;
        }
        if (a == null || b == null) {
            return false;
        }
        return TextUtils.equals(a.getAction(), b.getAction());
    }

    /**
     * @return The ISO 3166-1 two letters country code of the country the user
     *         is in.
     */
    public static final String getCurrentCountryIso(Context context) {
        CountryDetector detector =
                (CountryDetector) context.getSystemService(Context.COUNTRY_DETECTOR);
        return detector.detectCountry().getCountryIso();
    }
}