Use timestamp instead of boolean

src/main/java/org/openpodcastapi/opa/subscription/SubscriptionDTO.java

@@ -1,6 +1,7 @@
 package org.openpodcastapi.opa.subscription;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
+import jakarta.annotation.Nullable;
 import jakarta.validation.constraints.NotNull;
 import lombok.NonNull;
 import org.hibernate.validator.constraints.URL;
@@ -23,17 +24,17 @@ public record SubscriptionCreateDTO(
 
     /// A DTO representing a user's subscription to a given feed
     ///
-    /// @param uuid         the feed UUID
-    /// @param feedUrl      the feed URL
-    /// @param createdAt    the date at which the subscription link was created
-    /// @param updatedAt    the date at which the subscription link was last updated
-    /// @param isSubscribed whether the user is currently subscribed to the feed
+    /// @param uuid           the feed UUID
+    /// @param feedUrl        the feed URL
+    /// @param createdAt      the date at which the subscription link was created
+    /// @param updatedAt      the date at which the subscription link was last updated
+    /// @param unsubscribedAt the date at which the user unsubscribed from the feed
     public record UserSubscriptionDTO(
             @JsonProperty(required = true) @UUID java.util.UUID uuid,
             @JsonProperty(required = true) @URL String feedUrl,
             @JsonProperty(required = true) Instant createdAt,
             @JsonProperty(required = true) Instant updatedAt,
-            @JsonProperty(required = true) Boolean isSubscribed
+            @JsonProperty @Nullable Instant unsubscribedAt
     ) {
     }
 

src/main/java/org/openpodcastapi/opa/subscription/SubscriptionService.java

@@ -10,6 +10,7 @@
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
+import java.time.Instant;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.UUID;
@@ -73,7 +74,7 @@ public SubscriptionDTO.UserSubscriptionDTO getUserSubscriptionBySubscriptionUuid
     @Transactional(readOnly = true)
     public Page<SubscriptionDTO.@NonNull UserSubscriptionDTO> getAllActiveSubscriptionsForUser(Long userId, Pageable pageable) {
         log.debug("Fetching all active subscriptions for {}", userId);
-        return userSubscriptionRepository.findAllByUserIdAndIsSubscribedTrue(userId, pageable).map(userSubscriptionMapper::toDto);
+        return userSubscriptionRepository.findAllByUserIdAndUnsubscribedAtNotEmpty(userId, pageable).map(userSubscriptionMapper::toDto);
     }
 
     /// Persists a new user subscription to the database
@@ -91,13 +92,13 @@ protected SubscriptionDTO.UserSubscriptionDTO persistUserSubscription(Subscripti
         final var newSubscription = userSubscriptionRepository.findByUserIdAndSubscriptionUuid(userId, subscriptionEntity.getUuid()).orElseGet(() -> {
             log.debug("Creating new subscription for user {} and subscription {}", userId, subscriptionEntity.getUuid());
             final var createdSubscriptionEntity = new UserSubscriptionEntity();
-            createdSubscriptionEntity.setIsSubscribed(true);
+            createdSubscriptionEntity.setUnsubscribedAt(null);
             createdSubscriptionEntity.setUser(userEntity);
             createdSubscriptionEntity.setSubscription(subscriptionEntity);
             return userSubscriptionRepository.save(createdSubscriptionEntity);
         });
 
-        newSubscription.setIsSubscribed(true);
+        newSubscription.setUnsubscribedAt(null);
         return userSubscriptionMapper.toDto(userSubscriptionRepository.save(newSubscription));
     }
 
@@ -143,7 +144,7 @@ public SubscriptionDTO.UserSubscriptionDTO unsubscribeUserFromFeed(UUID feedUUID
         final var userSubscriptionEntity = userSubscriptionRepository.findByUserIdAndSubscriptionUuid(userId, feedUUID)
                 .orElseThrow(() -> new EntityNotFoundException("no subscription found"));
 
-        userSubscriptionEntity.setIsSubscribed(false);
+        userSubscriptionEntity.setUnsubscribedAt(Instant.now());
         return userSubscriptionMapper.toDto(userSubscriptionRepository.save(userSubscriptionEntity));
     }
 }

src/main/java/org/openpodcastapi/opa/subscription/UserSubscriptionEntity.java

@@ -31,15 +31,15 @@ public class UserSubscriptionEntity {
     @JoinColumn(name = "subscription_id")
     private SubscriptionEntity subscription;
 
-    @Column(columnDefinition = "boolean default true")
-    private Boolean isSubscribed;
-
     @Column(nullable = false, updatable = false)
     private Instant createdAt;
 
     @Column(nullable = false)
     private Instant updatedAt;
 
+    @Column
+    private Instant unsubscribedAt;
+
     @PrePersist
     public void prePersist() {
         this.setUuid(UUID.randomUUID());

src/main/java/org/openpodcastapi/opa/subscription/UserSubscriptionRepository.java

@@ -15,5 +15,5 @@ public interface UserSubscriptionRepository extends JpaRepository<@NonNull UserS
 
     Page<@NonNull UserSubscriptionEntity> findAllByUserId(Long userId, Pageable pageable);
 
-    Page<@NonNull UserSubscriptionEntity> findAllByUserIdAndIsSubscribedTrue(Long userId, Pageable pageable);
+    Page<@NonNull UserSubscriptionEntity> findAllByUserIdAndUnsubscribedAtNotEmpty(Long userId, Pageable pageable);
 }

src/main/resources/db/migration/V2__.sql

@@ -0,0 +1,5 @@
+ALTER TABLE user_subscription
+    ADD unsubscribed_at TIMESTAMP WITHOUT TIME ZONE;
+
+ALTER TABLE user_subscription
+    DROP COLUMN is_subscribed;