[R9] Validator to check if the consultation date was scheduled at least 30 minutes in advance

src/main/java/com/mirna/hospitalmanagementapi/domain/validators/consultation/ConsultationDateScheduledInAdvanceValidator.java

@@ -0,0 +1,25 @@
+package com.mirna.hospitalmanagementapi.domain.validators.consultation;
+
+import java.time.Duration;
+import java.time.LocalDateTime;
+
+import com.mirna.hospitalmanagementapi.domain.validators.consultation.constraints.ConsultationDateScheduledInAdvance;
+
+import jakarta.validation.ConstraintValidator;
+import jakarta.validation.ConstraintValidatorContext;
+import jakarta.validation.constraints.Future;
+
+public class ConsultationDateScheduledInAdvanceValidator implements ConstraintValidator <ConsultationDateScheduledInAdvance, LocalDateTime> {
+
+	@Override
+	public boolean isValid(LocalDateTime value, ConstraintValidatorContext context) {
+		LocalDateTime now = LocalDateTime.now();
+		
+		long diff = Duration.between(now, value).toMinutes();
+		
+		if (diff < 30L) return false;
+		
+		return true;
+	}
+
+}

src/main/java/com/mirna/hospitalmanagementapi/domain/validators/consultation/constraints/ConsultationDateScheduledInAdvance.java

@@ -0,0 +1,23 @@
+package com.mirna.hospitalmanagementapi.domain.validators.consultation.constraints;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import com.mirna.hospitalmanagementapi.domain.validators.consultation.ConsultationDateScheduledInAdvanceValidator;
+
+import jakarta.validation.Constraint;
+import jakarta.validation.Payload;
+
+@Constraint(validatedBy = ConsultationDateScheduledInAdvanceValidator.class)
+@Target( { ElementType.METHOD, ElementType.FIELD })
+@Retention(RetentionPolicy.RUNTIME)
+@Documented
+public @interface ConsultationDateScheduledInAdvance {
+
+	String message() default "This consultation must be scheduled at least 30 minutes in advance";
+    Class<?>[] groups() default {};
+    Class<? extends Payload>[] payload() default {};
+}