/*******************************************************************************
 *
 * Copyright (c) 2004-2012 Oracle Corporation.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *
 *    Kohsuke Kawaguchi, Winston Prakash
 *
 *******************************************************************************/ 

package hudson.model;

import com.thoughtworks.xstream.converters.basic.AbstractSingleValueConverter;
import hudson.Util;
import hudson.security.ACL;
import org.kohsuke.stapler.StaplerRequest;
import org.kohsuke.stapler.StaplerResponse;

import java.io.IOException;
import org.eclipse.hudson.security.HudsonSecurityEntitiesHolder;
import org.springframework.security.access.AccessDeniedException;

/**
 * Authorization token to allow projects to trigger themselves under the secured
 * environment.
 *
 * @author Kohsuke Kawaguchi
 * @see BuildableItem
 * @deprecated 2008-07-20 Use {@link ACL} and {@link AbstractProject#BUILD}.
 * This code is only here for the backward compatibility.
 */
public final class BuildAuthorizationToken {

    private final String token;

    public BuildAuthorizationToken(String token) {
        this.token = token;
    }

    public static BuildAuthorizationToken create(StaplerRequest req) {
        if (req.getParameter("pseudoRemoteTrigger") != null) {
            String token = Util.fixEmpty(req.getParameter("authToken"));
            if (token != null) {
                return new BuildAuthorizationToken(token);
            }
        }

        return null;
    }

    public static void checkPermission(AbstractProject project, BuildAuthorizationToken token, StaplerRequest req, StaplerResponse rsp) throws IOException {
        if (!HudsonSecurityEntitiesHolder.getHudsonSecurityManager().isUseSecurity()) {
            return;    // everyone is authorized
        }
        if (token != null && token.token != null) {
            //check the provided token
            String providedToken = req.getParameter("token");
            if (providedToken != null && providedToken.equals(token.token)) {
                return;
            }
            if (providedToken != null) {
                throw new AccessDeniedException(Messages.BuildAuthorizationToken_InvalidTokenProvided());
            }
        }

        project.checkPermission(AbstractProject.BUILD);
    }

    public String getToken() {
        return token;
    }

    public static final class ConverterImpl extends AbstractSingleValueConverter {

        public boolean canConvert(Class type) {
            return type == BuildAuthorizationToken.class;
        }

        public Object fromString(String str) {
            return new BuildAuthorizationToken(str);
        }

        @Override
        public String toString(Object obj) {
            return ((BuildAuthorizationToken) obj).token;
        }
    }
}