[ES-722]

signup-service/src/main/java/io/mosip/signup/dto/GenerateChallengeRequest.java

@@ -15,5 +15,6 @@ public class GenerateChallengeRequest {
     private String locale;
     private boolean regenerate;
 
+    @io.mosip.signup.validator.Purpose
     private Purpose purpose;
 }

signup-service/src/main/java/io/mosip/signup/util/ErrorConstants.java

@@ -8,6 +8,7 @@ public class ErrorConstants {
     public static final String INVALID_PASSWORD = "invalid_password";
     public static final String INVALID_USERINFO = "invalid_username";
     public static final String INVALID_CONSENT = "invalid_consent";
+    public static final String INVALID_PURPOSE ="invalid_purpose";
     public static final String IDENTIFIER_MISMATCH = "identifier_mismatch";
     public static final String CONSENT_REQUIRED = "consent_required";
     public static final String INVALID_TRANSACTION="invalid_transaction";

signup-service/src/main/java/io/mosip/signup/validator/Purpose.java

@@ -0,0 +1,23 @@
+package io.mosip.signup.validator;
+
+import io.mosip.signup.util.ErrorConstants;
+
+import javax.validation.Constraint;
+import javax.validation.Payload;
+import java.lang.annotation.Documented;
+import java.lang.annotation.Retention;
+import java.lang.annotation.Target;
+
+import static java.lang.annotation.ElementType.FIELD;
+import static java.lang.annotation.ElementType.TYPE_USE;
+import static java.lang.annotation.RetentionPolicy.RUNTIME;
+
+@Target({FIELD, TYPE_USE})
+@Retention(RUNTIME)
+@Constraint(validatedBy = PurposeValidator.class)
+@Documented
+public @interface Purpose {
+    String message() default ErrorConstants.INVALID_PURPOSE;
+    Class<?>[] groups() default {};
+    Class<? extends Payload>[] payload() default {};
+}

signup-service/src/main/java/io/mosip/signup/validator/PurposeValidator.java

@@ -0,0 +1,14 @@
+package io.mosip.signup.validator;
+
+import javax.validation.ConstraintValidator;
+import javax.validation.ConstraintValidatorContext;
+import io.mosip.signup.util.Purpose;
+
+public class PurposeValidator implements ConstraintValidator<io.mosip.signup.validator.Purpose, Purpose> {
+    @Override
+    public boolean isValid(Purpose value, ConstraintValidatorContext context) {
+        if(value == null)
+            return false;
+        return value.equals(Purpose.REGISTRATION) || value.equals(Purpose.RESET_PASSWORD);
+    }
+}

signup-service/src/test/java/io/mosip/signup/controllers/RegistrationControllerTest.java

@@ -519,6 +519,23 @@ public void doGenerateChallenge_withRegistrationPurpose_thenPass() throws Except
                 .andExpect(jsonPath("$.errors").isEmpty());
     }
 
+    @Test
+    public void doGenerateChallenge_withNullPurpose_returnErrorResponse() throws Exception {
+        String status = "SUCCESSFUL";
+        GenerateChallengeResponse generateChallengeResponse = new GenerateChallengeResponse(status);
+        generateChallengeRequest.setPurpose(null);
+        when(registrationService.generateChallenge(generateChallengeRequest, ""))
+                .thenReturn(generateChallengeResponse);
+
+        mockMvc.perform(post("/registration/generate-challenge")
+                        .content(objectMapper.writeValueAsString(wrapper))
+                        .contentType(MediaType.APPLICATION_JSON))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.response").isEmpty())
+                .andExpect(jsonPath("$.errors").isNotEmpty())
+                .andExpect(jsonPath("$.errors[0].errorCode").value(ErrorConstants.INVALID_PURPOSE));
+    }
+
     @Test
     public void doGenerateChallenge_withResetPasswordPurpose_thenPass() throws Exception {
         String status = "SUCCESSFUL";