1 files changed, 72 insertions, 0 deletions
diff --git a/Firebase/Database/Core/View/FEventRaiser.m b/Firebase/Database/Core/View/FEventRaiser.m
new file mode 100644
index 0000000..94a0907
--- /dev/null
+++ b/Firebase/Database/Core/View/FEventRaiser.m
@@ -0,0 +1,72 @@
+/*
+ * 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 "FEventRaiser.h"
+#import "FDataEvent.h"
+#import "FTypedefs.h"
+#import "FUtilities.h"
+#import "FTupleUserCallback.h"
+#import "FRepo.h"
+#import "FRepoManager.h"
+
+@interface FEventRaiser ()
+
+@property (nonatomic, strong) dispatch_queue_t queue;
+
+@end
+
+/**
+* This class exists for symmetry with other clients, but since events are async, we don't need to do the complicated
+* stuff the JS client does to preserve event order.
+*/
+@implementation FEventRaiser
+
+- (id)init {
+    [NSException raise:NSInternalInconsistencyException format:@"Can't use default constructor"];
+    return nil;
+}
+
+- (id)initWithQueue:(dispatch_queue_t)queue {
+    self = [super init];
+    if (self != nil) {
+        self->_queue = queue;
+    }
+    return self;
+}
+
+- (void) raiseEvents:(NSArray *)eventDataList {
+    for (id<FEvent> event in eventDataList) {
+        [event fireEventOnQueue:self.queue];
+    }
+}
+
+- (void) raiseCallback:(fbt_void_void)callback {
+    dispatch_async(self.queue, callback);
+}
+
+- (void) raiseCallbacks:(NSArray *)callbackList {
+    for (fbt_void_void callback in callbackList) {
+        dispatch_async(self.queue, callback);
+    }
+}
+
++ (void) raiseCallbacks:(NSArray *)callbackList queue:(dispatch_queue_t)queue {
+    for (fbt_void_void callback in callbackList) {
+        dispatch_async(queue, callback);
+    }
+}
+
+@end