/*

 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package propertiesparser.parser;

import java.util.ArrayList;

import java.util.List;

/**

 * A message within the message file.

 * A message is a series of lines containing a "name=value" property,

 * optionally preceded by a comment describing the use of placeholders

 * such as {0}, {1}, etc within the property value.

 */

public final class Message {

    final MessageLine firstLine;

    private MessageInfo messageInfo;

    Message(MessageLine l) {

        firstLine = l;

    }

    /**

     * Get the Info object for this message. It may be empty if there

     * if no comment preceding the property specification.

     */

    public MessageInfo getMessageInfo() {

        if (messageInfo == null) {

            MessageLine l = firstLine.prev;

            if (l != null && l.isInfo())

                messageInfo = new MessageInfo(l.text);

            else

                messageInfo = MessageInfo.dummyInfo;

        }

        return messageInfo;

    }

    /**

     * Get all the lines pertaining to this message.

     */

    public List<MessageLine> getLines(boolean includeAllPrecedingComments) {

        List<MessageLine> lines = new ArrayList<>();

        MessageLine l = firstLine;

        if (includeAllPrecedingComments) {

            // scan back to find end of prev message

            while (l.prev != null && l.prev.isEmptyOrComment())

                l = l.prev;

            // skip leading blank lines

            while (l.text.isEmpty())

                l = l.next;

        } else {

            if (l.prev != null && l.prev.isInfo())

                l = l.prev;

        }

        // include any preceding lines

        for ( ; l != firstLine; l = l.next)

            lines.add(l);

        // include message lines

        for (l = firstLine; l != null && l.hasContinuation(); l = l.next)

            lines.add(l);

        lines.add(l);

        // include trailing blank line if present

        l = l.next;

        if (l != null && l.text.isEmpty())

            lines.add(l);

        return lines;

    }

}