1 files changed, 88 insertions, 0 deletions
diff --git a/Firestore/Source/Core/FSTEventManager.h b/Firestore/Source/Core/FSTEventManager.h
new file mode 100644
index 0000000..43ada66
--- /dev/null
+++ b/Firestore/Source/Core/FSTEventManager.h
@@ -0,0 +1,88 @@
+/*
+ * 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 "FSTRemoteStore.h"
+#import "FSTTypes.h"
+#import "FSTViewSnapshot.h"
+
+@class FSTQuery;
+@class FSTSyncEngine;
+
+NS_ASSUME_NONNULL_BEGIN
+
+#pragma mark - FSTListenOptions
+
+@interface FSTListenOptions : NSObject
+
++ (instancetype)defaultOptions;
+
+- (instancetype)initWithIncludeQueryMetadataChanges:(BOOL)includeQueryMetadataChanges
+                     includeDocumentMetadataChanges:(BOOL)includeDocumentMetadataChanges
+                              waitForSyncWhenOnline:(BOOL)waitForSyncWhenOnline
+    NS_DESIGNATED_INITIALIZER;
+
+- (instancetype)init NS_UNAVAILABLE;
+
+@property(nonatomic, assign, readonly) BOOL includeQueryMetadataChanges;
+
+@property(nonatomic, assign, readonly) BOOL includeDocumentMetadataChanges;
+
+@property(nonatomic, assign, readonly) BOOL waitForSyncWhenOnline;
+
+@end
+
+#pragma mark - FSTQueryListener
+
+/**
+ * FSTQueryListener takes a series of internal view snapshots and determines when to raise
+ * user-facing events.
+ */
+@interface FSTQueryListener : NSObject
+
+- (instancetype)initWithQuery:(FSTQuery *)query
+                      options:(FSTListenOptions *)options
+          viewSnapshotHandler:(FSTViewSnapshotHandler)viewSnapshotHandler NS_DESIGNATED_INITIALIZER;
+
+- (instancetype)init NS_UNAVAILABLE;
+
+- (void)queryDidChangeViewSnapshot:(FSTViewSnapshot *)snapshot;
+- (void)queryDidError:(NSError *)error;
+- (void)clientDidChangeOnlineState:(FSTOnlineState)onlineState;
+
+@property(nonatomic, strong, readonly) FSTQuery *query;
+
+@end
+
+#pragma mark - FSTEventManager
+
+/**
+ * EventManager is responsible for mapping queries to query event emitters. It handles "fan-out."
+ * (Identical queries will re-use the same watch on the backend.)
+ */
+@interface FSTEventManager : NSObject <FSTOnlineStateDelegate>
+
++ (instancetype)eventManagerWithSyncEngine:(FSTSyncEngine *)syncEngine;
+
+- (instancetype)init __attribute__((unavailable("Use static constructor method.")));
+
+- (FSTTargetID)addListener:(FSTQueryListener *)listener;
+- (void)removeListener:(FSTQueryListener *)listener;
+
+@end
+
+NS_ASSUME_NONNULL_END