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1676 ankur.sing 1 
package in.shop2020.support.controllers;
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import in.shop2020.support.services.RegisteredUsersGenerator;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import javax.servlet.ServletOutputStream;
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import org.apache.struts2.convention.annotation.InterceptorRef;
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import org.apache.struts2.convention.annotation.InterceptorRefs;
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import org.apache.struts2.convention.annotation.Result;
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@InterceptorRefs({
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    @InterceptorRef("myDefault"),
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    @InterceptorRef("login")
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})
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public class RegisteredUsersController extends ReportsController {
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    private final String authsuccess = "authsuccess";
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    private String message = "";
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    public RegisteredUsersController() {
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    }
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    public String index() {
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        if(!canAccessReport()) {
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            return "exception";
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        }
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        return authsuccess;
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    }
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    // Handles the POST request (Form Submission)
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    public String create() {
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        RegisteredUsersGenerator usersReportGenerator = new RegisteredUsersGenerator();
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        ByteArrayOutputStream baos = usersReportGenerator.generateRegisteredUsersReport();
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        if(baos == null) {
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            message = "No registered user exists.";;
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            return authsuccess;
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        }
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        // Preparing XLS file for output
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        getServletResponse().setContentType("application/vnd.ms-excel");
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        getServletResponse().setHeader("Content-disposition", "inline; filename=registered-users" + ".xls");
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        ServletOutputStream sos;
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        try {
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            sos = getServletResponse().getOutputStream();
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            baos.writeTo(sos);
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            sos.flush();
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        } catch (IOException e) {
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            e.printStackTrace();
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        }
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        return authsuccess;
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    }
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    public String getMessage() {
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        return message;
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    }
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}