From a78a2bcef238ce8f6eca2f316c8884d003602069 Mon Sep 17 00:00:00 2001
From: stefan-niedermann <info@niedermann.it>
Date: Sun, 15 Sep 2019 15:19:28 +0200
Subject: Handle remote deletes for cards

---
 .../persistence/sync/adapters/db/DataBaseAdapter.java    |  4 ++++
 .../sync/helpers/providers/AbstractSyncDataProvider.java | 16 ++++++++++++++--
 .../sync/helpers/providers/CardDataProvider.java         |  9 +++++++++
 3 files changed, 27 insertions(+), 2 deletions(-)

(limited to 'app/src/main')

diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/DataBaseAdapter.java b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/DataBaseAdapter.java
index 2dd90ff35..2e7e46d15 100644
--- a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/DataBaseAdapter.java
+++ b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/DataBaseAdapter.java
@@ -123,6 +123,10 @@ public class DataBaseAdapter {
         return LiveDataHelper.interceptLiveData(db.getCardDao().getFullCardsForStack(accountId, localStackId), this::readRelationsForCard);
     }
 
+    public List<FullCard> getFullCardsForStackDirectly(long accountId, long localStackId) {
+        return db.getCardDao().getFullCardsForStackDirectly(accountId, localStackId);
+    }
+
     public User getUserByUidDirectly(long accountId, String uid) {
         return db.getUserDao().getUserByUidDirectly(accountId, uid);
     }
diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/helpers/providers/AbstractSyncDataProvider.java b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/helpers/providers/AbstractSyncDataProvider.java
index f70b50679..1a5fe7034 100644
--- a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/helpers/providers/AbstractSyncDataProvider.java
+++ b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/helpers/providers/AbstractSyncDataProvider.java
@@ -31,8 +31,20 @@ public abstract class AbstractSyncDataProvider<T extends IRemoteEntity> {
     }
 
     protected List<T> findDelta(List<T> entitiesFromServer, List<T> localEntities){
-        //TODO implement
-        return null;
+        List<T> delta = new ArrayList<>();
+        for (T localEntity : localEntities) {
+            boolean found = false;
+            for (T remoteEntity : entitiesFromServer) {
+                if (remoteEntity.getId().equals(localEntity.getId())) {
+                    found = true;
+                    break;
+                }
+            }
+            if (!found){
+                delta.add(localEntity);
+            }
+        }
+        return delta;
     }
 
     public void addChild(AbstractSyncDataProvider<?> child) {
diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/helpers/providers/CardDataProvider.java b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/helpers/providers/CardDataProvider.java
index 8eb4530bf..987f8f073 100644
--- a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/helpers/providers/CardDataProvider.java
+++ b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/helpers/providers/CardDataProvider.java
@@ -224,4 +224,13 @@ public class CardDataProvider extends AbstractSyncDataProvider<FullCard> {
         }
         callback.onResponse(Boolean.TRUE);
     }
+
+    @Override
+    public void handleDeletes(ServerAdapter serverAdapter, DataBaseAdapter dataBaseAdapter, long accountId, List<FullCard> entitiesFromServer) {
+        List<FullCard> localCards = dataBaseAdapter.getFullCardsForStackDirectly(accountId, stack.getLocalId());
+        List<FullCard> delta = findDelta(entitiesFromServer, localCards);
+        for (FullCard cardToDelete : delta) {
+            dataBaseAdapter.deleteCardPhysically(cardToDelete.getCard());
+        }
+    }
 }
-- 
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