Development: Implement InterviewSlot entity/repository (#1242)

Author: Abi107717

src/main/java/de/tum/cit/aet/interview/domain/InterviewSlot.java

@@ -0,0 +1,47 @@
+package de.tum.cit.aet.interview.domain;
+
+import de.tum.cit.aet.core.domain.AbstractAuditingEntity;
+import jakarta.persistence.*;
+import jakarta.validation.constraints.NotNull;
+import java.time.Instant;
+import java.util.UUID;
+import lombok.Getter;
+import lombok.Setter;
+
+/**
+ * Entity representing a time slot for an interview.
+ * Each slot can be booked by exactly one application.
+ */
+@Entity
+@Table(name = "interview_slots")
+@Getter
+@Setter
+public class InterviewSlot extends AbstractAuditingEntity {
+
+    @Id
+    @GeneratedValue
+    private UUID id;
+
+    @NotNull
+    @ManyToOne(fetch = FetchType.LAZY, optional = false)
+    @JoinColumn(name = "interview_process_id", nullable = false)
+    private InterviewProcess interviewProcess;
+
+    @NotNull
+    @Column(name = "start_date_time", nullable = false)
+    private Instant startDateTime;
+
+    @NotNull
+    @Column(name = "end_date_time", nullable = false)
+    private Instant endDateTime;
+
+    @NotNull
+    @Column(name = "location", nullable = false)
+    private String location;
+
+    @Column(name = "stream_link")
+    private String streamLink;
+
+    @Column(name = "is_booked", nullable = false)
+    private Boolean isBooked = false;
+}

src/main/java/de/tum/cit/aet/interview/repository/InterviewSlotRepository.java

@@ -0,0 +1,33 @@
+package de.tum.cit.aet.interview.repository;
+
+import de.tum.cit.aet.interview.domain.InterviewSlot;
+import java.util.List;
+import java.util.UUID;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+import org.springframework.stereotype.Repository;
+
+/**
+ * Repository for managing interview slots.
+ */
+@Repository
+public interface InterviewSlotRepository extends JpaRepository<InterviewSlot, UUID> {
+    /**
+     * Finds all interview slots for a given interview process, ordered by start time.
+     *
+     * @param processId the ID of the interview process
+     * @return a list of {@link InterviewSlot} entities associated with the given process,
+     *         ordered by start date and time
+     */
+    @Query("SELECT s FROM InterviewSlot s WHERE s.interviewProcess.id = :processId ORDER BY s.startDateTime")
+    List<InterviewSlot> findByInterviewProcessIdOrderByStartDateTime(@Param("processId") UUID processId);
+
+    /**
+     * Counts all interview slots associated with a specific interview process.
+     *
+     * @param processId the ID of the interview process
+     * @return the number of slots linked to the given process
+     */
+    long countByInterviewProcessId(UUID processId);
+}

src/main/resources/config/liquibase/changelog/00000000000013_create_interview_slot_table.xml

@@ -0,0 +1,60 @@
+<?xml version="1.0" encoding="utf-8"?>
+<databaseChangeLog
+  xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog
+                        http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-latest.xsd">
+
+  <changeSet id="create-interview-slots-table" author="abinayasivaguru">
+    <createTable tableName="interview_slots">
+      <column name="id" type="uuid">
+        <constraints primaryKey="true" nullable="false"/>
+      </column>
+
+      <column name="interview_process_id" type="uuid">
+        <constraints nullable="false"/>
+      </column>
+
+      <column name="start_date_time" type="timestamp">
+        <constraints nullable="false"/>
+      </column>
+
+      <column name="end_date_time" type="timestamp">
+        <constraints nullable="false"/>
+      </column>
+
+      <column name="location" type="varchar(255)">
+        <constraints nullable="false"/>
+      </column>
+
+      <column name="stream_link" type="varchar(500)"/>
+
+      <column name="is_booked" type="boolean" defaultValueBoolean="false">
+        <constraints nullable="false"/>
+      </column>
+
+      <!-- Audit fields from AbstractAuditingEntity -->
+      <column name="created_by" type="varchar(50)"/>
+      <column name="created_at" type="timestamp"/>
+      <column name="last_modified_by" type="varchar(50)"/>
+      <column name="last_modified_at" type="timestamp"/>
+    </createTable>
+
+    <addForeignKeyConstraint
+      baseTableName="interview_slots"
+      baseColumnNames="interview_process_id"
+      referencedTableName="interview_processes"
+      referencedColumnNames="id"
+      constraintName="fk_interview_slots_process"
+      onDelete="CASCADE"/>
+
+    <createIndex tableName="interview_slots" indexName="idx_slots_process_start_time">
+      <column name="interview_process_id"/>
+      <column name="start_date_time"/>
+    </createIndex>
+
+    <createIndex tableName="interview_slots" indexName="idx_slots_is_booked">
+      <column name="is_booked"/>
+    </createIndex>
+  </changeSet>
+</databaseChangeLog>

src/main/resources/config/liquibase/master.xml

@@ -22,6 +22,7 @@
   <include file="changelog/00000000000011_alter_application_add_applied_date.xml"
     relativeToChangelogFile="true" />
   <include file="changelog/00000000000012_create_interview_processes.xml" relativeToChangelogFile="true"/>
+  <include file="changelog/00000000000013_create_interview_slot_table.xml" relativeToChangelogFile="true"/>
 
   <!-- jhipster-needle-liquibase-add-changelog - JHipster will add liquibase changelogs here -->
   <!-- jhipster-needle-liquibase-add-constraints-changelog - JHipster will add liquibase constraints