1 files changed, 51 insertions, 0 deletions
diff --git a/Firestore/Source/Local/FSTLocalViewChanges.h b/Firestore/Source/Local/FSTLocalViewChanges.h
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--- /dev/null
+++ b/Firestore/Source/Local/FSTLocalViewChanges.h
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+#import "FSTDocumentKeySet.h"
+
+@class FSTDocumentKey;
+@class FSTDocumentSet;
+@class FSTMutation;
+@class FSTQuery;
+@class FSTRemoteEvent;
+@class FSTViewSnapshot;
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * A set of changes to what documents are currently in view and out of view for a given query.
+ * These changes are sent to the LocalStore by the View (via the SyncEngine) and are used to pin /
+ * unpin documents as appropriate.
+ */
+@interface FSTLocalViewChanges : NSObject
+
++ (instancetype)changesForQuery:(FSTQuery *)query
+                      addedKeys:(FSTDocumentKeySet *)addedKeys
+                    removedKeys:(FSTDocumentKeySet *)removedKeys;
+
++ (instancetype)changesForViewSnapshot:(FSTViewSnapshot *)viewSnapshot;
+
+- (id)init NS_UNAVAILABLE;
+
+@property(nonatomic, strong, readonly) FSTQuery *query;
+@property(nonatomic, strong) FSTDocumentKeySet *addedKeys;
+@property(nonatomic, strong) FSTDocumentKeySet *removedKeys;
+
+@end
+
+NS_ASSUME_NONNULL_END