/**
 * Copyright (C) 2015 BonitaSoft S.A.
 * BonitaSoft, 32 rue Gustave Eiffel - 38000 Grenoble
 * This library is free software; you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation
 * version 2.1 of the License.
 * This library 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 Lesser General Public License for more details.
 * You should have received a copy of the GNU Lesser General Public License along with this
 * program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
 * Floor, Boston, MA 02110-1301, USA.
 **/
package org.bonitasoft.web.rest.server.api.bpm.flownode;

import org.bonitasoft.console.common.server.utils.ContractTypeConverter;
import org.bonitasoft.engine.api.ProcessAPI;
import org.bonitasoft.engine.bpm.contract.ContractDefinition;
import org.bonitasoft.engine.bpm.flownode.UserTaskNotFoundException;
import org.bonitasoft.web.rest.server.api.resource.CommonResource;
import org.bonitasoft.web.toolkit.client.common.exception.api.APIException;
import org.restlet.resource.Get;

/**
 * @author Emmanuel Duchastenier
 * @author Fabio Lombardi
 */
public class UserTaskContractResource extends CommonResource {

    static final String TASK_ID = "taskId";

    private final ProcessAPI processAPI;

    protected ContractTypeConverter typeConverterUtil = new ContractTypeConverter(ContractTypeConverter.ISO_8601_DATE_PATTERNS);

    public UserTaskContractResource(final ProcessAPI processAPI) {
        this.processAPI = processAPI;
    }

    @Get("json")
    public ContractDefinition getContract() throws UserTaskNotFoundException {
        ContractDefinition processContract = processAPI.getUserTaskContract(getTaskIdParameter());
        return typeConverterUtil.getAdaptedContractDefinition(processContract);
    }

    protected long getTaskIdParameter() {
        final String taskId = getAttribute(TASK_ID);
        if (taskId == null) {
            throw new APIException("Attribute '" + TASK_ID + "' is mandatory");
        }
        return Long.parseLong(taskId);
    }
}