org.obiba.onyx.marble.core.service.impl.DefaultActiveConsentServiceImpl.java Source code

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Here is the source code for org.obiba.onyx.marble.core.service.impl.DefaultActiveConsentServiceImpl.java

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/*******************************************************************************
 * Copyright 2008(c) The OBiBa Consortium. All rights reserved.
 * 
 * This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
package org.obiba.onyx.marble.core.service.impl;

import java.io.IOException;
import java.util.Collection;

import org.apache.wicket.util.string.Strings;
import org.obiba.core.service.impl.PersistenceManagerAwareService;
import org.obiba.onyx.core.domain.participant.Interview;
import org.obiba.onyx.core.service.ActiveInterviewService;
import org.obiba.onyx.marble.core.service.ActiveConsentService;
import org.obiba.onyx.marble.domain.consent.Consent;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.lowagie.text.pdf.AcroFields;
import com.lowagie.text.pdf.PdfReader;

public class DefaultActiveConsentServiceImpl extends PersistenceManagerAwareService
        implements ActiveConsentService {

    private static final Logger log = LoggerFactory.getLogger(DefaultActiveConsentServiceImpl.class);

    private ActiveInterviewService activeInterviewService;

    private Consent consent;

    public ActiveInterviewService getActiveInterviewService() {
        return activeInterviewService;
    }

    public void setActiveInterviewService(ActiveInterviewService activeInterviewService) {
        this.activeInterviewService = activeInterviewService;
    }

    public Consent getConsent() {
        return getConsent(false);
    }

    public Consent getConsent(boolean newInstance) {

        Interview currentInterview = activeInterviewService.getInterview();

        // Consent doesn't exist or new object requested.
        if (consent == null || newInstance) {
            consent = new Consent();
            consent.setInterview(currentInterview);
            consent.setDeleted(false);

            log.debug("Created new consent object for interview id = {}", currentInterview.getId());

        } else {
            log.debug("Returning consent object found in current session = {}", currentInterview.getId());
        }

        return consent;
    }

    @SuppressWarnings("unchecked")
    public boolean validateElectronicConsent() {

        byte[] pdfForm = consent.getPdfForm();
        if (pdfForm != null) {

            // Access PDF content with IText library.
            PdfReader reader;
            try {
                reader = new PdfReader(pdfForm);
            } catch (IOException ex) {
                log.error("Could not read PDF consent form", ex);
                throw new RuntimeException(ex);
            }

            // Get the PDF form fields.
            AcroFields form = reader.getAcroFields();

            // Make sure that all mandatory fields have been filled.
            Collection<String> fieldNameList = form.getFields().keySet();
            for (String fieldName : fieldNameList) {
                if (isMandatoryField(form, fieldName)) {
                    if (Strings.isEmpty(form.getField(fieldName))) {
                        log.debug("The following mandatory field was not filled in : {}", fieldName);
                        return false;
                    }
                }
            }

            return true;

            // Invalid if PDF form does not exist.
        } else {
            return false;
        }
    }

    private boolean isMandatoryField(AcroFields form, String fieldName) {
        int fieldType = form.getFieldType(fieldName);

        // Fields name ending with ".mandatoryFields" are required.
        return fieldName.contains("_mandatoryField") && fieldType != AcroFields.FIELD_TYPE_PUSHBUTTON;
    }

    public boolean isConsentFormSubmitted() {
        if (consent.isAccepted() != null) {
            return true;
        }
        return false;
    }
}