/*
 * Copyright (c) 1997, 2023 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package jakarta.mail;

/**
 * This class represents a set of quotas for a given quota root.
 * Each quota root has a set of resources, represented by the
 * <code>Quota.Resource</code> class.  Each resource has a name
 * (for example, "STORAGE"), a current usage, and a usage limit.
 * See RFC 2087.
 *
 * @author Bill Shannon
 * @since JavaMail 1.4
 */

public class Quota {

    /**
     * An individual resource in a quota root.
     *
     * @since JavaMail 1.4
     */
    public static class Resource {
        /**
         * The name of the resource.
         */
        public String name;
        /**
         * The current usage of the resource.
         */
        public long usage;
        /**
         * The usage limit for the resource.
         */
        public long limit;

        /**
         * Construct a Resource object with the given name,
         * usage, and limit.
         *
         * @param name  the resource name
         * @param usage the current usage of the resource
         * @param limit the usage limit for the resource
         */
        public Resource(String name, long usage, long limit) {
            this.name = name;
            this.usage = usage;
            this.limit = limit;
        }
    }

    /**
     * The name of the quota root.
     */
    public String quotaRoot;

    /**
     * The set of resources associated with this quota root.
     */
    public Quota.Resource[] resources;

    /**
     * Create a Quota object for the named quotaroot with no associated
     * resources.
     *
     * @param quotaRoot the name of the quota root
     */
    public Quota(String quotaRoot) {
        this.quotaRoot = quotaRoot;
    }

    /**
     * Set a resource limit for this quota root.
     *
     * @param name  the name of the resource
     * @param limit the resource limit
     */
    public void setResourceLimit(String name, long limit) {
        if (resources == null) {
            resources = new Quota.Resource[1];
            resources[0] = new Quota.Resource(name, 0, limit);
            return;
        }
        for (int i = 0; i < resources.length; i++) {
            if (resources[i].name.equalsIgnoreCase(name)) {
                resources[i].limit = limit;
                return;
            }
        }
        Quota.Resource[] ra = new Quota.Resource[resources.length + 1];
        System.arraycopy(resources, 0, ra, 0, resources.length);
        ra[ra.length - 1] = new Quota.Resource(name, 0, limit);
        resources = ra;
    }
}
