Added time methods to Checkin, created CheckinListener

src/main/java/com/coderscampus/cp/domain/Checkin.java

@@ -2,9 +2,10 @@
 
 import jakarta.persistence.*;
 
+import java.math.BigInteger;
+import java.time.Duration;
 import java.time.Instant;
 import java.time.LocalDateTime;
-
 @Entity
 public class Checkin {
 	@Id
@@ -22,6 +23,8 @@ public class Checkin {
 	private Instant endTime;
 	private CodingType codingType;
 	private Integer issueNumber;
+	private BigInteger timeInClassInSeconds;
+
 	@ManyToOne(fetch = FetchType.LAZY, cascade = CascadeType.ALL)
 	@JoinColumn(name = "student_id")
 	private Student student;
@@ -138,12 +141,28 @@ public void setStudent(Student student) {
 		this.student = student;
 	}
 
+	public Boolean getSetUp() {
+		return isSetUp;
+	}
+
+	public void setSetUp(Boolean setUp) {
+		isSetUp = setUp;
+	}
+
+	public BigInteger getTimeInClassInSeconds() {
+		return timeInClassInSeconds;
+	}
+
+	public void setTimeInClassInSeconds(BigInteger timeInClassInSeconds) {
+		this.timeInClassInSeconds = timeInClassInSeconds;
+	}
+
 	// ENUMS
 	public enum CodingType{
 		FOUNDATIONS, CRUD, CODE_REVIEW, DESIGN, DOCUMENTATION
 	}
 	public enum Role{
-		FOUNDATIONS, OBSERVER,  CODER, GUIDE, SCRUM_MASTER, PRODUCT_OWNER
+		FOUNDATIONS, OBSERVER, CODER, GUIDE, SCRUM_MASTER, PRODUCT_OWNER
 	}
 
 	@Override
@@ -152,17 +171,26 @@ public String toString() {
 				"id=" + id +
 				", uid='" + uid + '\'' +
 				", date=" + date +
-				", assignment=" + nextAssignment +
+				", nextAssignment=" + nextAssignment +
 				", blockers=" + blockers +
 				", blockerDescription='" + blockerDescription + '\'' +
 				", isSetUp=" + isSetUp +
 				", available=" + available +
 				", role=" + role +
 				", startTime=" + startTime +
 				", endTime=" + endTime +
-				", issueNumber=" + issueNumber +
 				", codingType=" + codingType +
-				", student=" + student +
+				", issueNumber=" + issueNumber +
+				", timeInClassInSeconds=" + timeInClassInSeconds +
 				'}';
 	}
-}
+
+	public void calculateTimeInClass() {
+		if (startTime != null && endTime != null) {
+			long seconds = Duration.between(startTime, endTime).getSeconds();
+			setTimeInClassInSeconds(BigInteger.valueOf(seconds));
+		} else {
+			setTimeInClassInSeconds(BigInteger.ZERO);
+		}
+	}
+}

src/main/java/com/coderscampus/cp/domain/CheckinListener.java

@@ -0,0 +1,12 @@
+package com.coderscampus.cp.domain;
+
+import jakarta.persistence.PrePersist;
+import jakarta.persistence.PreUpdate;
+
+public class CheckinListener {
+    @PrePersist
+    @PreUpdate
+    public void beforeSave(Checkin checkin) {
+        checkin.calculateTimeInClass();
+    }
+}