PatientSearchProvider.java

/**
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
 * License for the specific language governing rights and limitations under
 * the License.
 *
 * The Original Code is OpenELIS code.
 *
 * Copyright (C) The Minnesota Department of Health.  All Rights Reserved.
 *
 * Contributor(s): CIRG, University of Washington, Seattle WA.
 */
package us.mn.state.health.lims.common.provider.query;

import org.apache.commons.validator.GenericValidator;
import us.mn.state.health.lims.common.action.IActionConstants;
import us.mn.state.health.lims.common.provider.query.workerObjects.PatientSearchLocalAndClinicWorker;
import us.mn.state.health.lims.common.provider.query.workerObjects.PatientSearchLocalWorker;
import us.mn.state.health.lims.common.provider.query.workerObjects.PatientSearchWorker;
import us.mn.state.health.lims.common.services.ObservationHistoryService;
import us.mn.state.health.lims.common.services.ObservationHistoryService.ObservationType;
import us.mn.state.health.lims.common.services.PatientService;
import us.mn.state.health.lims.common.servlet.validation.AjaxServlet;
import us.mn.state.health.lims.common.util.ConfigurationProperties;
import us.mn.state.health.lims.common.util.ConfigurationProperties.Property;
import us.mn.state.health.lims.login.valueholder.UserSessionData;
import us.mn.state.health.lims.patient.valueholder.Patient;
import us.mn.state.health.lims.sample.dao.SampleDAO;
import us.mn.state.health.lims.sample.daoimpl.SampleDAOImpl;
import us.mn.state.health.lims.sample.valueholder.Sample;
import us.mn.state.health.lims.samplehuman.dao.SampleHumanDAO;
import us.mn.state.health.lims.samplehuman.daoimpl.SampleHumanDAOImpl;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.math.BigDecimal;

public class PatientSearchProvider extends BaseQueryProvider{

	protected AjaxServlet ajaxServlet = null;

	@Override
	public void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{

		String lastName = request.getParameter("lastName");
		String firstName = request.getParameter("firstName");
		String STNumber = request.getParameter("STNumber");
        // N.B. This is a bad name, it is other than STnumber
		String subjectNumber = request.getParameter("subjectNumber");
		String nationalID = request.getParameter("nationalID");
		String labNumber = request.getParameter("labNumber");
		String guid = request.getParameter("guid");
		String suppressExternalSearch = request.getParameter("suppressExternalSearch");
		String patientID = null;

		String result = VALID;
		StringBuilder xml = new StringBuilder();
		// If we have a lab number then the patient is in the system and we just
		// have to get the patient and format the xml
		if(!GenericValidator.isBlankOrNull(labNumber)){
			Patient patient = getPatientForLabNumber(labNumber);
			if(patient == null || GenericValidator.isBlankOrNull(patient.getId())){
				result = IActionConstants.INVALID;
				xml.append("No results were found for search.  Check spelling or remove some of the fields");
			}else{
				PatientSearchResults searchResults = getSearchResultsForPatient(patient);
				PatientSearchWorker localWorker = new PatientSearchLocalWorker();
				localWorker.appendSearchResultRow(searchResults, xml);
			}
		}else{

			PatientSearchWorker worker = getAppropriateWorker(request, "true".equals(suppressExternalSearch));

			if(worker != null){
				result = worker.createSearchResultXML(lastName, firstName, STNumber, subjectNumber, nationalID, patientID, guid, xml);
			}else{
				result = INVALID;
				xml.append("System is not configured correctly for searching for patients. Contact Administrator");
			}
		}
		ajaxServlet.sendData(xml.toString(), result, request, response);

	}

	private PatientSearchResults getSearchResultsForPatient(Patient patient){
		PatientService service = new PatientService(patient);

		return new PatientSearchResults(BigDecimal.valueOf(Long.parseLong(patient.getId())),
				service.getFirstName(),
				service.getLastName(),
				service.getGender(),
				service.getEnteredDOB(),
				service.getNationalId(),
				patient.getExternalId(),
				service.getSTNumber(),
				service.getSubjectNumber(),
				service.getGUID(),
                ObservationHistoryService.getMostRecentValueForPatient( ObservationType.REFERRERS_PATIENT_ID, service.getPatientId() ));
	}

	private Patient getPatientForLabNumber(String labNumber){

		SampleDAO sampleDAO = new SampleDAOImpl();
		Sample sample = sampleDAO.getSampleByAccessionNumber(labNumber);

		if(sample != null && !GenericValidator.isBlankOrNull(sample.getId())){
			SampleHumanDAO sampleHumanDAO = new SampleHumanDAOImpl();
			return sampleHumanDAO.getPatientForSample(sample);
		}

		return new Patient();
	}

	private PatientSearchWorker getAppropriateWorker(HttpServletRequest request, boolean suppressExternalSearch){

		if(ConfigurationProperties.getInstance().isCaseInsensitivePropertyValueEqual(Property.UseExternalPatientInfo, "false")
				|| suppressExternalSearch){
			return new PatientSearchLocalWorker();
		}else{
			UserSessionData usd = (UserSessionData)request.getSession().getAttribute(USER_SESSION_DATA);

			return new PatientSearchLocalAndClinicWorker(String.valueOf(usd.getSystemUserId()));
		}
	}

	@Override
	public void setServlet(AjaxServlet as){
		this.ajaxServlet = as;
	}

	@Override
	public AjaxServlet getServlet(){
		return this.ajaxServlet;
	}

}