Add cache logic

src/main/java/ru/cathub/telegabot/model/BookCreationCache.java

@@ -7,8 +7,22 @@ import lombok.RequiredArgsConstructor;
 @RequiredArgsConstructor
 @Data
 public class BookCreationCache {
-
+    public enum CreationState {
+        ADDING_TITLE,
+        ADDING_AUTHOR, 
+        ADDING_RATING
+    }
+    
     private String title;
     private String author;
     private Integer rating;
+    private CreationState creationState = CreationState.ADDING_TITLE;
+    
+    public CreationState getCreationState() {
+        return creationState;
+    }
+    
+    public void setCreationState(CreationState creationState) {
+        this.creationState = creationState;
+    }
 }

src/test/java/ru/cathub/telegabot/TelegaBotApplicationTests.java

@@ -2,6 +2,7 @@ package ru.cathub.telegabot;
 
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.context.ApplicationContext;
 import org.springframework.test.context.TestPropertySource;