/*
 * Copyright (C) 2013, 2015 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS CONTRIBUTORS
 * 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.
 */

WI.DatabaseTreeElement = class DatabaseTreeElement extends WI.GeneralTreeElement
{
    constructor(representedObject)
    {
        console.assert(representedObject instanceof WI.DatabaseObject);

        const subtitle = null;
        super("database-icon", representedObject.name, subtitle, representedObject, {hasChildren: true});

        this.hasChildren = false;

        // Since we are initially telling the tree element we don't have any children, make sure that we try to populate
        // the tree element (which will get a list of tables) when the element is created.
        this.onpopulate();
    }

    // Overrides from TreeElement (Private)

    oncollapse()
    {
        this.shouldRefreshChildren = true;
    }

    onpopulate()
    {
        if (this.children.length && !this.shouldRefreshChildren)
            return;

        this.shouldRefreshChildren = false;

        this.removeChildren();

        function tableNamesCallback(tableNames)
        {
            for (var i = 0; i < tableNames.length; ++i) {
                var databaseTable = new WI.DatabaseTableObject(tableNames[i], this.representedObject);
                this.appendChild(new WI.DatabaseTableTreeElement(databaseTable));
            }

            this.hasChildren = tableNames.length;
        }

        this.representedObject.getTableNames(tableNamesCallback.bind(this));
    }
};