/*
Copyright © 2013-2014, Silent Circle, LLC.
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
    * Any redistribution, use, or modification is done solely for personal 
      benefit and not for any commercial purpose or for monetary gain
    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.
    * Neither the name Silent Circle nor the names of its contributors may 
      be used to endorse or promote products derived from this software 
      without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL SILENT CIRCLE, LLC BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

/*
 * This  implementation is an edited version of original Android sources.
 */

/*
 * 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.silentcircle.vcard;

import android.accounts.Account;

import java.util.ArrayList;
import java.util.List;

/**
 * <p>
 * The {@link VCardInterpreter} implementation which enables {@link VCardEntryHandler} objects
 * to easily handle each vCard entry.
 * </p>
 * <p>
 * This class understand details inside vCard and translates it to {@link VCardEntry}.
 * Then the class throw it to {@link VCardEntryHandler} registered via
 * {@link #addEntryHandler(VCardEntryHandler)}, so that all those registered objects
 * are able to handle the {@link VCardEntry} object.
 * </p>
 * <p>
 * If you want to know the detail inside vCard, it would be better to implement
 * {@link VCardInterpreter} directly, instead of relying on this class and
 * {@link VCardEntry} created by the object.
 * </p>
 */
public class VCardEntryConstructor implements VCardInterpreter {
    private static String LOG_TAG = VCardConstants.LOG_TAG;

    /**
     * Represents current stack of VCardEntry. Used to support nested vCard (vCard 2.1).
     */
    private final List<VCardEntry> mEntryStack = new ArrayList<VCardEntry>();
    private VCardEntry mCurrentEntry;

    private final int mVCardType;
    private final Account mAccount;

    private final List<VCardEntryHandler> mEntryHandlers = new ArrayList<VCardEntryHandler>();

    public VCardEntryConstructor() {
        this(VCardConfig.VCARD_TYPE_V21_GENERIC, null);
    }

    public VCardEntryConstructor(final int vcardType) {
        this(vcardType, null);
    }

    public VCardEntryConstructor(final int vcardType, final Account account) {
        mVCardType = vcardType;
        mAccount = account;
    }

    public void addEntryHandler(VCardEntryHandler entryHandler) {
        mEntryHandlers.add(entryHandler);
    }

    @Override
    public void onVCardStarted() {
        for (VCardEntryHandler entryHandler : mEntryHandlers) {
            entryHandler.onStart();
        }
    }

    @Override
    public void onVCardEnded() {
        for (VCardEntryHandler entryHandler : mEntryHandlers) {
            entryHandler.onEnd();
        }
    }

    public void clear() {
        mCurrentEntry = null;
        mEntryStack.clear();
    }

    @Override
    public void onEntryStarted() {
        mCurrentEntry = new VCardEntry(mVCardType, mAccount);
        mEntryStack.add(mCurrentEntry);
    }

    @Override
    public void onEntryEnded() {
        mCurrentEntry.consolidateFields();
        for (VCardEntryHandler entryHandler : mEntryHandlers) {
            entryHandler.onEntryCreated(mCurrentEntry);
        }

        final int size = mEntryStack.size();
        if (size > 1) {
            VCardEntry parent = mEntryStack.get(size - 2);
            parent.addChild(mCurrentEntry);
            mCurrentEntry = parent;
        } else {
            mCurrentEntry = null;
        }
        mEntryStack.remove(size - 1);
    }

    @Override
    public void onPropertyCreated(VCardProperty property) {
        mCurrentEntry.addProperty(property);
    }
}