ExportStructureService.java

/*
 * @(#)ExportStructureService.java
 *
 * Copyright 2011 Instituto Superior Tecnico
 * Founding Authors: Luis Cruz, Nuno Ochoa, Paulo Abrantes
 * 
 *      https://fenix-ashes.ist.utl.pt/
 * 
 *   This file is part of the Expenditure Tracking Module.
 *
 *   The Expenditure Tracking Module 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, either version 
 *   3 of the License, or (at your option) any later version.
 *
 *   The Expenditure Tracking Module 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 the Expenditure Tracking Module. If not, see <http://www.gnu.org/licenses/>.
 * 
 */
package module.webservice;

import java.util.HashSet;
import java.util.Set;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.Response;

import org.fenixedu.bennu.core.domain.User;

import pt.ist.expenditureTrackingSystem._development.ExpenditureConfiguration;
import pt.ist.expenditureTrackingSystem.domain.ExpenditureTrackingSystem;
import pt.ist.expenditureTrackingSystem.domain.authorizations.Authorization;
import pt.ist.expenditureTrackingSystem.domain.organization.AccountingUnit;
import pt.ist.expenditureTrackingSystem.domain.organization.CostCenter;
import pt.ist.expenditureTrackingSystem.domain.organization.Person;
import pt.ist.expenditureTrackingSystem.domain.organization.Unit;

@Path("/exportStructureService")
/**
 * 
 * @author Luis Cruz
 * 
 */
public class ExportStructureService {

    @GET
    @Path("{username}/{password}/listCostCenters.csv")
    @Produces("text/csv")
    public Response listCostCenters(@PathParam("username") final String username, @PathParam("password") final String password) {
        check(username, password);
        final String content = generateCostCenterList();
        return Response.ok(content, "text/csv").build();
    }

    @GET
    @Path("listCostCenters.csv")
    @Produces("text/csv")
    public Response listCostCentersParams(@QueryParam("username") final String username,
            @QueryParam("password") final String password) {
        return listCostCenters(username, password);
    }

    private String generateCostCenterList() {
        final StringBuilder stringBuilder = new StringBuilder();
        for (final Unit unit : ExpenditureTrackingSystem.getInstance().getUnitsSet()) {
            if (unit instanceof CostCenter) {
                final CostCenter costCenter = (CostCenter) unit;
                if (isActive(costCenter)) {
                    final Set<User> authorities = getActiveAuthorizationSet(costCenter);

                    if (authorities.isEmpty()) {
                        stringBuilder.append(costCenter.getCostCenter());
                        stringBuilder.append("\t");
                        stringBuilder.append(costCenter.getName());
                        stringBuilder.append("\t");
                        final AccountingUnit accountingUnit = costCenter.getAccountingUnit();
                        if (accountingUnit == null) {
                            stringBuilder.append(" ");
                        } else {
                            stringBuilder.append(accountingUnit.getName());
                        }
                        stringBuilder.append("\t");
                        final CostCenter parent = getParent(costCenter);
                        if (parent == null) {
                            stringBuilder.append(" ");
                        } else {
                            stringBuilder.append(parent.getCostCenter());
                        }
                        stringBuilder.append("\t");

                        // responsáveis
                        stringBuilder.append(" ");
                        stringBuilder.append("\t");

                        // e-mail
                        stringBuilder.append(" ");

                        stringBuilder.append("\n");

                    } else {
                        for (final User user : authorities) {
                            stringBuilder.append(costCenter.getCostCenter());
                            stringBuilder.append("\t");
                            stringBuilder.append(costCenter.getName());
                            stringBuilder.append("\t");
                            final AccountingUnit accountingUnit = costCenter.getAccountingUnit();
                            if (accountingUnit == null) {
                                stringBuilder.append(" ");
                            } else {
                                stringBuilder.append(accountingUnit.getName());
                            }
                            stringBuilder.append("\t");
                            final CostCenter parent = getParent(costCenter);
                            if (parent == null) {
                                stringBuilder.append(" ");
                            } else {
                                stringBuilder.append(parent.getCostCenter());
                            }
                            stringBuilder.append("\t");

                            // responsáveis
                            stringBuilder.append(user.getUsername());
                            stringBuilder.append("\t");

                            // e-mail
                            final String email = user.getEmail();
                            stringBuilder.append(email == null ? " " : email);

                            stringBuilder.append("\n");
                        }
                    }
                }
            }
        }
        return stringBuilder.toString();
    }

    private Set<User> getActiveAuthorizationSet(final Unit unit) {
        final Set<User> result = new HashSet<User>();
        for (final Authorization authorization : unit.getAuthorizationsSet()) {
            if (authorization.isValid()) {
                final Person person = authorization.getPerson();
                final User user = person.getUser();
                result.add(user);
            }
        }
        if (result.isEmpty()) {
            final Unit parentUnit = unit.getParentUnit();
            if (parentUnit != null) {
                return getActiveAuthorizationSet(parentUnit);
            }
        }
        return result;
    }

    private CostCenter getParent(final Unit unit) {
        final Unit parent = unit.getParentUnit();
        return parent == null || parent instanceof CostCenter ? (CostCenter) parent : getParent(parent);
    }

    private boolean isActive(final CostCenter costCenter) {
        return costCenter.isActive();
    }

    private void check(final String username, final String password) {
        final String eUsername = ExpenditureConfiguration.get().exportStructureServiceUsername();
        final String ePassword = ExpenditureConfiguration.get().exportStructureServicePassword();

        if (!match(username, eUsername) || !match(password, ePassword)) {
            throw new Error("unauthorized.access");
        }
    }

    private boolean match(final String s1, final String s2) {
        return s1 != null && s1.equals(s2);
    }

}