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26785 amit.gupta 1 
package com.spice.profitmandi.service;
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import java.nio.charset.StandardCharsets;
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import org.apache.commons.lang3.RandomStringUtils;
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import org.apache.logging.log4j.LogManager;
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import org.apache.logging.log4j.Logger;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.mail.javamail.JavaMailSender;
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import org.springframework.stereotype.Component;
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import com.google.common.hash.Hashing;
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import com.spice.profitmandi.common.exception.ProfitMandiBusinessException;
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import com.spice.profitmandi.dao.entity.fofo.Customer;
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import com.spice.profitmandi.dao.repository.fofo.CustomerRepository;
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@Component
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public class CustomerServiceImpl implements CustomerService {
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	// private static final String RESET_PASSWORD_BODY = "Dear %s, your password has
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	// been reset. Please click this <a href=\"%s\">link</a> to reset your
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	// password.\n\nRegards\nSmartdukaan";
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	private static final String RESET_PASSWORD_BODY = "Dear %s, your password has been reset to %s. Regards\nSmartdukaan";
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	private static final String RESET_PASSWORD_SUBJECT = "Password Reset request";
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	private static final Logger LOGGER = LogManager.getLogger(AuthServiceImpl.class);
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	@Autowired
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	CustomerRepository customerRepository;
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	@Autowired
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	JavaMailSender mailSender;
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	private String getHash256(String originalString) {
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		return Hashing.sha256().hashString(originalString, StandardCharsets.UTF_8).toString();
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	}
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	@Override
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	public boolean authenticate(String mobile, String password) {
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		return customerRepository.authenticate(mobile, getHash256(password));
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	}
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	@Override
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	public Customer addCustomer(Customer customer) {
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		try {
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			customer = customerRepository.selectByMobileNumber(customer.getMobileNumber());
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		} catch (ProfitMandiBusinessException pbse) {
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			if(customer.getPassword()!=null) {
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				customer.setPassword(getHash256(customer.getPassword()));
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			} else {
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				customer.setPassword(getHash256(getRandomString()));
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			}
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			try {
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				customerRepository.persist(customer);
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			} catch(Exception e) {
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				e.printStackTrace();
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			}
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		}
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		return customer;
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	}
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	private String getRandomString() {
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		int length = 10;
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		boolean useLetters = true;
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		boolean useNumbers = false;
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		String generatedString = RandomStringUtils.random(length, useLetters, useNumbers);
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		return generatedString;
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	}
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	@Override
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	public boolean changePassword(String mobileNumber, String oldPassword, String newPassword) throws ProfitMandiBusinessException {
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		if(newPassword==null || newPassword.isEmpty()) {
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			throw new ProfitMandiBusinessException("error","","Password cannot be empty");
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		}
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		if(oldPassword==null || oldPassword.isEmpty()) {
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			throw new ProfitMandiBusinessException("error", "", "Old Password cannot be empty");
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		}
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		if(mobileNumber==null || mobileNumber.isEmpty()) {
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			throw new ProfitMandiBusinessException("error", "", "Mobile number cannot be empty");
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		}
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		if(!customerRepository.authenticate(mobileNumber, getHash256(oldPassword))) {
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			throw new ProfitMandiBusinessException("error", "", "Old Password is not correct");
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		}
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		if(customerRepository.authenticate(mobileNumber, getHash256(newPassword))) {
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			throw new ProfitMandiBusinessException("error", "", "New Password cannot be same as old password");
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		}
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		Customer customer = customerRepository.selectByMobileNumber(mobileNumber);
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		if(customer==null) {
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			throw new ProfitMandiBusinessException("error", "", "Mobile number does not exist");
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		}
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		 if(customer.getPassword()==null) {
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			throw new ProfitMandiBusinessException("error", "", "Password cannot be empty");
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		}
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		LOGGER.info(customer+" customer data is fetched successfully");
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		if(customer.getPassword().equals(getHash256(oldPassword))) {
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			customer.setPassword(getHash256(newPassword));
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			LOGGER.info("Password changed successfully");
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			return true;
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		}
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		return false;
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    }
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	@Override
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	public void resetPassword(String mobileNumber, String newPassword)
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			throws ProfitMandiBusinessException {
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		Customer customer = customerRepository.selectByMobileNumber(mobileNumber);
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		customer.setPassword(getHash256(newPassword));
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	}
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}