APIChannelImpl.java

/*
* AMRIT – Accessible Medical Records via Integrated Technology 
* Integrated EHR (Electronic Health Records) Solution 
*
* Copyright (C) "Piramal Swasthya Management and Research Institute" 
*
* This file is part of AMRIT.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program.  If not, see https://www.gnu.org/licenses/.
*/
package com.wipro.fhir.service.api_channel;

import java.util.HashMap;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Service;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import com.wipro.fhir.data.request_handler.ResourceRequestHandler;
import com.wipro.fhir.data.request_handler.UserAuthAPIResponse;
import com.wipro.fhir.utils.CookieUtil;
import com.wipro.fhir.utils.RestTemplateUtil;
import com.wipro.fhir.utils.exception.FHIRException;
import com.wipro.fhir.utils.mapper.InputMapper;

import jakarta.servlet.http.HttpServletRequest;

@Service
public class APIChannelImpl implements APIChannel {
	static RestTemplate restTemplate;

	@Value("${benSearchByBenIDURL}")
	private String benSearchByBenIDURL;

	@Value("${userAuthURL}")
	private String userAuthURL;

	@Value("${fhirUserName}")
	private String fhirUserName;

	@Value("${fhirPassword}")
	private String fhirPassword;

	@Autowired
	private CookieUtil cookieUtil;

	/**
	 * search patient by beneficiary ID
	 */
	@Override
	public String benSearchByBenID(String Authorization, ResourceRequestHandler resourceRequestHandler)
			throws FHIRException {
		String responseBody = null;
		if (restTemplate == null)
			restTemplate = new RestTemplate();
		
		HttpEntity<Object> request = RestTemplateUtil.createRequestEntity(resourceRequestHandler, Authorization);
		ResponseEntity<String> response = restTemplate.exchange(benSearchByBenIDURL, HttpMethod.POST, request,
				String.class);

		if (response.getStatusCodeValue() == 200 && response.hasBody()) {
			responseBody = response.getBody();
		} else {
			throw new FHIRException("error in patient search");
		}

		return responseBody;

	}

	// Authentication mechanism
	@Override
	public String userAuthentication() throws FHIRException {
		String responseBody = null;
		String authKey = null;

		Map<String, Object> userDetails = new HashMap<String, Object>();
		String decryptUserName = fhirUserName;
		String decryptPassword = fhirPassword;

		userDetails.put("userName", decryptUserName);
		userDetails.put("password", decryptPassword);
		userDetails.put("doLogout", true);

		if (restTemplate == null)
			restTemplate = new RestTemplate();
		HttpServletRequest requestHeader = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes())
				.getRequest();
		
		HttpEntity<Object> urlRequestOBJ = RestTemplateUtil.createRequestEntity(userDetails, requestHeader.getHeader("Authorization"));
		ResponseEntity<String> response = restTemplate.exchange(userAuthURL, HttpMethod.POST, urlRequestOBJ,
				String.class);

		if (response != null && response.getStatusCodeValue() == 200) {
			responseBody = response.getBody();

			if (responseBody != null) {
				UserAuthAPIResponse psr = (InputMapper.gson().fromJson(responseBody, UserAuthAPIResponse.class));
				if (psr != null) {
					if (psr.getData().getIsAuthenticated() && psr.getData().getStatus().equalsIgnoreCase("Active"))
						authKey = psr.getData().getKey();
				}
			}
		}
		return authKey;
	}

	private MultiValueMap<String, String> getHttpHeader(String Authorization, String contentType) {
		MultiValueMap<String, String> headers = new LinkedMultiValueMap<String, String>();

		if (contentType != null)
			headers.add("Content-Type", contentType);
		else
			headers.add("Content-Type", "application/json");

		if (Authorization != null)
			headers.add("AUTHORIZATION", Authorization);
		return headers;
	}

}