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package in.shop2020.serving.controllers;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Random;
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import in.shop2020.model.v1.user.UserContextService.Client;
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import in.shop2020.serving.controllers.BaseController;
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import in.shop2020.serving.utils.DesEncrypter;
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import in.shop2020.thrift.clients.HelperClient;
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import in.shop2020.thrift.clients.UserClient;
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import in.shop2020.utils.Mail;
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import org.apache.log4j.Logger;
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import org.apache.struts2.convention.annotation.Result;
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import org.apache.struts2.convention.annotation.Results;
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import org.apache.struts2.rest.DefaultHttpHeaders;
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import org.apache.struts2.rest.HttpHeaders;
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@Results({
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    @Result(name="failure", type="redirectAction",
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    		params = {"actionName" , "forgot-password"})
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})
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public class ForgotPasswordController extends BaseController{
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	private static final long serialVersionUID = 1L;
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	private static final String chars = "abcdefghijklmonpqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
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    private static final Random random = new Random();
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    private static final int LENGTH = 10;
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	private static Logger log = Logger.getLogger(Class.class);
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	private DesEncrypter desEncrypter = new DesEncrypter("saholic");
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		public ForgotPasswordController(){
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			super();
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		}
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		 // GET /Forgot password page
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		 public HttpHeaders index() {
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			return new DefaultHttpHeaders("index").disableCaching();
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		 }
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		// POST /Forgot password
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		public String create() {
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	    	log.info("ForgotPasswordController.create");
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	    	String emailId = request.getParameter("emailId");
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	    	if(emailId != null && !emailId.isEmpty() && !emailId.contains(" ")){
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	    		UserClient userContextServiceClient;
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				try {
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					userContextServiceClient = new UserClient();
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		    		Client client = userContextServiceClient.getClient();
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		    		if(!client.userExists(emailId)){
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		    			addActionError("Email address is not registered with us.");
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		    			return "failure";
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		    		}
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		    		String newPassword = generateNewPassword();
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		    		String encryptedPassword =   desEncrypter.encrypt(newPassword);
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		    		if(client.forgotPassword(emailId, encryptedPassword)){
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		    			if(mailNewPassword(emailId, newPassword)){
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		    				return "success";
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		    			}else{
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		    				return "failure";
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		    			}
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		    		}else{
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		    			addActionError("Email address is not registered with us.");
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		    			return "failure";
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		    		}
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				} catch (Exception e) {
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					log.error("Unexpected error while processing forgot password request", e);
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					addActionError("Something went wrong. Try again.");
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				}
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	    	}
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	    	else{
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	    		addActionError("Please enter valid email Id...");
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	    	}
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	    	return "failure";
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	    }
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		private boolean mailNewPassword(String emailId, String newPassword) {
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			List<String> toList = new ArrayList<String>();
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			toList.add(emailId);
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			HelperClient helperServiceClient = null;
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			try {
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				helperServiceClient = new HelperClient();
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				in.shop2020.utils.HelperService.Client client = helperServiceClient.getClient();
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				client.saveUserEmailForSending(toList, "help@saholic.com", "Password reset request", "Your new password is: " + newPassword, "", "ForgotPassword", new ArrayList<String>(), new ArrayList<String>(), 1);
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			} catch (Exception e) {
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				log.error("Unexpected error while mailing the new password");
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				return false;
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			}
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			return true;
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		}
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		private static String generateNewPassword() {
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		    char[] buf = new char[LENGTH];
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	        for (int i = 0; i < buf.length; i++) {
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	            buf[i] = chars.charAt(random.nextInt(chars.length()));
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	        }
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	        return new String(buf);
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	    }
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}